Elevator Ventilation System

Abstract

To provide an elevator ventilation system capable of appropriately ventilating the inside of an elevator car and the inside of an elevator shaft.SOLUTION: An elevator ventilation system includes: a ventilation part 4 for a shaft for ventilating the inside of an elevator shaft 3 where an elevator car 2 moves up and down; and a ventilation part 5 for a car for ventilating the inside of the elevator car 2 in a form that air inside the elevator car 2 is discharged inside the elevator shaft 3. The ventilation part 5 for the car is configured so as to be switched to a car normal ventilation state and to a car increased ventilation state in which a ventilation volume is larger than that in the car normal ventilation state. The ventilation part 4 for the shaft is switched to a shaft normal ventilation state when the ventilation part 5 for the car is switched to the car normal ventilation state, and is switched to a shaft increased ventilation state in which a ventilation volume is larger than that in the shaft normal ventilation state when the ventilation part 5 for the car is switched to the car increased ventilation state.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an elevator ventilation system provided with a ventilation unit for a cage that ventilates the air inside an elevator cage by exhausting the air inside the elevator cage into the elevator shaft.

Background Art

[0002] Patent Document 1 discloses an elevator ventilation system including a ventilation unit for a shaft (such as an exhaust fan 14 with a HEPA filter) that ventilates the elevator shaft in which an elevator cage (cage 12) moves up and down, and a ventilation unit for a cage (FFU 9 and ventilation port 13) that ventilates the air inside the elevator cage by exhausting the air inside the elevator cage into the elevator shaft.

[0003] Further, Patent Document 2 discloses a cage purification system that circulates air inside an elevator cage (riding cage 10) by an air purification device 6 to purify the air inside the elevator cage. In this cage purification system, normally, the rotation speed of the fan of the air purification device 6 is set low (normal operation) to reduce the amount of circulated air, and when an infected person rides in the elevator cage, the rotation speed of the fan of the air purification device 6 is set high (purification operation) to increase the amount of circulated air.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, in the elevator ventilation system described in Patent Document 1, when there are air quality pollution factors in the elevator car (for example, when an infected person rides in the elevator car), etc., it may be necessary to quickly ventilate the elevator car. Therefore, referring to the system of Patent Document 2, in the elevator ventilation system described in Patent Document 1, usually, the rotation speed of the fan of the FFU is set low to reduce the ventilation volume, and when there are air quality pollution factors in the elevator car, it is conceivable to increase the rotation speed of the FFU to increase the ventilation volume. In this way, when rapid ventilation in the elevator car is required, such as when there are air quality pollution factors in the elevator car, it is conceivable to increase the ventilation volume by the cage ventilation unit to quickly ventilate the elevator car.

[0006] However, when the ventilation volume by the cage ventilation unit is increased as described above, the amount of air exhausted from the elevator car into the elevator shaft increases, and the ventilation in the elevator shaft cannot be sufficiently performed, resulting in a problem that the elevator shaft is easily contaminated.

[0007] In view of this situation, the main problem of the present invention is to provide an elevator ventilation system capable of appropriately ventilating both the elevator car and the elevator shaft.

Means for Solving the Problems

[0008] The first characteristic configuration of the present invention includes a shaft ventilation unit for ventilating the elevator shaft in which the elevator car moves up and down, Supply the air in the elevator shaft into the elevator car and, and a cage ventilation unit for ventilating the elevator car in a form of exhausting the air in the elevator car into the elevator shaft, the cage ventilation unit is configured to be switchable between a normal cage ventilation state and a cage increased ventilation state in which the ventilation volume is larger than that in the normal cage ventilation state, The ventilation section for the shaft is configured to switch to the normal ventilation state of the shaft as the ventilation section for the cage switches to the normal ventilation state of the cage, and to switch to an increased ventilation state of the shaft with a larger ventilation volume than the normal ventilation state of the shaft as the ventilation section for the cage switches to the increased ventilation state of the cage. 、 The ventilation unit for the car includes a first air supply unit that supplies air without passing through an air supply filter and a second air supply unit that supplies air through the air supply filter. In a state where the car is switched to the normal ventilation state, air is supplied through the first air supply unit, and in a state where the car is switched to the increased ventilation state, air is supplied through the second air supply unit. This is the point.

[0009] According to this configuration, when there is a risk of air pollution in the elevator car (such as when there are air quality pollution factors in the elevator car), the ventilation section for the cage is switched from the normal ventilation state of the cage to the increased ventilation state of the cage to increase the ventilation volume for the elevator car, so that the ventilation in the elevator car can be quickly performed. And by switching the ventilation section for the cage to the increased ventilation state in this way, the amount of air exhausted from the elevator car into the elevator shaft increases, and the elevator shaft is likely to be contaminated. However, in response to this switching of the ventilation section for the cage, the ventilation section for the shaft also switches from the normal ventilation state of the shaft to the increased ventilation state of the shaft, and the ventilation volume for the elevator shaft increases, so that the ventilation in the elevator shaft can be appropriately performed. Therefore, the ventilation in the elevator car and the elevator shaft can be appropriately performed. The second characteristic configuration of the present invention is a ventilation unit for the shaft that ventilates the elevator shaft in which the elevator car moves up and down, and a ventilation unit for the car that ventilates the air in the elevator car in a form of exhausting the air in the elevator car into the elevator shaft, The ventilation unit for the car is configured to be switchable between a normal ventilation state of the car and an increased ventilation state of the car in which the ventilation volume is larger than that in the normal ventilation state of the car. The ventilation unit for the shaft is configured to switch to a normal ventilation state of the shaft as the ventilation unit for the car switches to the normal ventilation state of the car, and to switch to an increased ventilation state of the shaft in which the ventilation volume is larger than that in the normal ventilation state of the shaft as the ventilation unit for the car switches to the increased ventilation state of the car. The ventilation unit for the car includes a first exhaust unit that exhausts air without passing through an exhaust filter and a second exhaust unit that exhausts air through the exhaust filter. In a state where the car is switched to the normal ventilation state, air is exhausted through the first exhaust unit, and in a state where the car is switched to the increased ventilation state of the car, air is exhausted through the second exhaust unit. According to this configuration, when there is a risk of contamination of the air inside the elevator car (such as when air quality pollution factors get into the elevator car), the ventilation section for the car is switched from the normal car ventilation state to the increased car ventilation state to increase the ventilation volume for the elevator car, so that ventilation inside the elevator car can be carried out quickly. And by switching the ventilation section for the car to the increased car ventilation state in this way, the amount of air exhausted from the elevator car into the elevator shaft increases, and the elevator shaft is more likely to be contaminated. However, in response to the switching of this ventilation section for the car, the ventilation section for the shaft also switches from the normal shaft ventilation state to the increased shaft ventilation state, and the ventilation volume for the elevator shaft increases, so that ventilation inside the elevator shaft can be carried out appropriately. Therefore, ventilation can be appropriately carried out both inside the elevator car and inside the elevator shaft. Also, according to this configuration, in a state where the ventilation section for the car is switched to the increased car ventilation state, since the second exhaust section exhausts air through the exhaust filter, contamination of the air inside the elevator shaft can be prevented. In a state where the ventilation section for the car is switched to the normal ventilation state, since the first exhaust section exhausts air without passing through the exhaust filter, it becomes difficult for the exhaust filter to be contaminated, and the replacement frequency of the exhaust filter can be reduced.

[0010] The 3 characteristic configuration of the present invention includes a detection unit that detects air quality pollution factors in the elevator car, and the ventilation section for the cage is configured to switch from the normal ventilation state of the cage to the increased ventilation state of the cage as the detection unit detects.

[0011] According to this configuration, when air quality pollution factors such as contaminants and pollution sources exist inside the elevator car, this is detected by the detection unit, the ventilation unit for the car switches to the car increased ventilation state, and the inside of the elevator car can be quickly ventilated. Therefore, it is possible to prevent contaminants from adhering to and spreading among the people or objects inside the elevator car, and to prevent contaminated air from leaking into shared areas such as the elevator hall.

[0012] According to the first aspect of the present invention 4 The characteristic configuration is that the ventilation unit for the car is configured to maintain the car increased ventilation state from when the detection unit detects until the set conditions are satisfied, and to switch from the car increased ventilation state to the car normal ventilation state when the set conditions are satisfied.

[0013] According to this configuration, as the set conditions, for example, by setting that the air quality pollution factor gets off the elevator car, or a set time has elapsed since the air quality pollution factor got off the elevator car, etc., the car increased ventilation state of the ventilation unit for the car is maintained while the air quality pollution factor is in the elevator or for a while after the air quality pollution factor gets off the elevator. Therefore, the inside of the elevator car with the air quality pollution factor or the inside of the elevator car after the air quality pollution factor has gotten off can be quickly ventilated. In this way, since the car increased ventilation state is maintained until a preset state is reached after the air quality pollution factor gets into the elevator car, it is possible to further prevent contaminants from adhering to and spreading among the people or objects that have gotten into the elevator car, and to further prevent contaminated air from leaking into shared areas such as the elevator hall.

[0014] According to the second aspect of the present invention 5 The characteristic configuration is that the detection unit is configured to detect that an infected person has gotten into the elevator car.

[0015] According to this configuration, when an infected person rides in the elevator car, there is a risk that the air quality in the elevator car will be contaminated by the pathogen. However, when an infected person rides in the elevator car, this is detected by the detection unit, and the car ventilation unit switches to the increased ventilation state of the car, and it is possible to quickly ventilate the elevator car in which the infected person, who is the source of contamination, is riding. Therefore, it is possible to prevent the spread of infection to the people riding in the same elevator car as the infected person.

[0016] The 6 characteristic configuration is that the car ventilation unit includes an air supply unit that supplies air into the elevator car through an air supply filter for the air in the elevator shaft, and an exhaust unit that exhausts the air in the elevator car into the elevator shaft through an exhaust filter. In the state where it is switched to the increased ventilation state of the car, it is configured to supply air through the air supply filter of the air supply unit and exhaust air through the exhaust filter of the exhaust unit.

[0017] According to this configuration, in the increased ventilation state of the car, air is supplied into the elevator car through the air supply filter, and at the same time, air is exhausted into the elevator shaft through the exhaust filter. Therefore, it is possible to improve the cleanliness of the air in the elevator car and in the elevator shaft, and for example, it is possible to prevent the spread of contamination from the air in the elevator car and the air exhausted into the elevator shaft.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0021] An embodiment of an elevator ventilation system according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the elevator ventilation system 1 includes a shaft ventilation unit 4 that ventilates the elevator shaft 3 in which the elevator car 2 moves up and down, and a car ventilation unit 5 that ventilates the elevator car 2 in a form of exhausting the air in the elevator car 2 into the elevator shaft 3. In the present embodiment, the elevator ventilation system 1 is provided in a building 7 such as a hospital where an infected person (an example of an air quality pollution factor and an example of a pollution source) is likely to ride in the elevator car 2. Note that the infected person is a person infected with an infectious disease in which the infection spreads by droplet infection or airborne infection, or a person suspected of being infected with such an infectious disease.

[0022] An elevator hall 8 provided on each floor of the building 7 is formed with a hall opening 9 for getting on and off the elevator car 2, and a landing door 10 is provided to be openable and closable with respect to the hall opening 9. Further, the elevator car 2 is formed with a car opening 11 for getting on and off, and a car door 12 is provided to be openable and closable with respect to the car opening 11.

[0023] 〔Shaft ventilation unit 4〕 The shaft ventilation unit 4 is provided with a shaft air supply unit 14 that supplies the air in the elevator hall 8 into the elevator shaft 3, and a shaft exhaust unit 15 that exhausts the air in the elevator shaft 3 to the outside. The shaft ventilation unit 4 is configured to ventilate the elevator shaft 3 in a form of supplying the air in the elevator hall 8 into the elevator shaft 3 by the shaft air supply unit 14 and exhausting the air in the elevator shaft 3 to the outside such as the outdoors by the shaft exhaust unit 15.

[0024] The exhaust section 15 for the shaft includes a blower 16 with a shaft fan installed inside and a shaft filter 17. The exhaust section 15 for the shaft is configured to suck the air in the elevator shaft 3 by the rotation of the shaft fan of the blower 16 and exhaust it to the outside through the shaft filter 17.

[0025] The air supply section 14 for the shaft is constituted by the hall opening 9. To add an explanation, although the hall opening 9 is normally closed by the landing door 10, it can be ventilated through a gap or the like formed between the landing door 10 and the wall of the elevator hall 8. By the operation of the blower 16 in the exhaust section 15 for the shaft, the air in the elevator shaft 3 is forcibly exhausted, and the inside of the elevator shaft 3 becomes negative pressure with respect to the elevator hall 8. Thus, the air in the elevator hall 8 is configured to be supplied into the elevator shaft 3 through the hall opening 9.

[0026] The ventilation section 4 for the shaft is configured to be switchable between a normal shaft ventilation state and a shaft increased ventilation state with a larger ventilation volume than the normal shaft ventilation state. In the present embodiment, the ventilation section 4 for the shaft is switched to the normal shaft ventilation state by setting the rotation speed of the shaft fan of the blower 16 to the normal rotation speed, and is switched to the shaft increased ventilation state by setting the rotation speed of the shaft fan of the blower 16 to an increased rotation speed faster than the normal rotation speed. For example, in the normal shaft ventilation state, the ventilation volume per hour is set to be approximately the same as the volume of the elevator shaft 3, and the ventilation volume is such that the inside of the elevator shaft 3 can be ventilated once per hour (1 time / h). Also, in the shaft increased ventilation state, the ventilation volume per hour is set to be approximately 12 times the volume of the elevator shaft 3, and the ventilation volume is such that the inside of the elevator shaft 3 can be ventilated 12 times per hour (12 times / h). Further, in the present embodiment, as the shaft filter 17, a filter having a collecting effect on viruses and bacteria is used, specifically, a HEPA filter is used.

[0027] The exhaust section 15 for the shaft is installed above the hall opening 9 on the top floor, for example, in a machine room or the like provided at the upper end of the elevator shaft 3. Since the ventilation section 4 for the shaft is configured to exhaust the air in the elevator shaft to the outside through the shaft filter 17, the outside is prevented from being contaminated by the air exhausted from the elevator shaft 3. Further, the ventilation section 4 for the shaft is configured such that the air in the elevator shaft 3 is made negative with respect to the elevator hall 8, so that the air in the elevator hall 8 is supplied into the elevator shaft 3. Therefore, it is difficult for the air to flow out from the elevator shaft 3 into the elevator hall 8, and the contamination of the elevator hall 8 by the air in the elevator shaft 3 is suppressed.

[0028] 〔Ventilation section 5 for the car〕 The ventilation section 5 for the car is provided in the elevator car 2. The ventilation section 5 for the car is provided with an air supply section 19 for the car that supplies the air in the elevator shaft 3 into the elevator car 2, and an exhaust section 20 for the car that exhausts the air from the elevator car 2 into the elevator shaft 3. The ventilation section 5 for the car is configured to ventilate the elevator car 2 in such a manner that the air in the elevator shaft 3 is supplied into the elevator car 2 by the air supply section 19 for the car and the air in the elevator car 2 is exhausted into the elevator shaft 3 by the exhaust section 20 for the car. In the present embodiment, the air supply section 19 for the car includes a first air supply section 19A and a second air supply section 19B, and the exhaust section 20 for the car includes a first exhaust section 20A and a second exhaust section 20B.

[0029] The first exhaust section 20A is equipped with the first exhaust fan 22 but does not have a filter. As shown in FIG. 1, the first exhaust section 20A is configured to suck the air in the elevator car 2 by the rotation of the first exhaust fan 22 and exhaust it into the elevator shaft 3 without passing through a filter. The first exhaust section 20A is installed in the elevator car 2 so as to directly suck the air in the elevator car 2 and directly exhaust it into the elevator shaft 3, and sucks the air in the elevator car 2 and exhausts it into the elevator shaft 3 without using a duct.

[0030] The first air supply section 19A is constituted by the car opening 11. Although the car opening 11 is normally closed by the car door 12, it can be ventilated through a gap or the like formed between the car door 12 and the wall of the elevator car 2. When the first exhaust fan 22 of the first exhaust section 20A operates, the air in the elevator car 2 is forcibly exhausted, and the inside of the elevator car 2 becomes negative pressure with respect to the elevator shaft 3, so that the air in the elevator shaft 3 is supplied into the elevator car 2 through the car opening 11. Incidentally, when the elevator car 2 is stopped with respect to the elevator hall 8 and the landing door 10 and the car door 12 are open, the air in the elevator hall 8 is naturally supplied into the elevator car 2 through the hall opening 9 and the car opening 11.

[0031] The second exhaust section 20B is provided with the second exhaust fan 23 and the exhaust filter 24 integrated. As shown in FIG. 2, the second exhaust section 20B is configured to suck the air in the elevator car 2 by the rotation of the second exhaust fan 23 and exhaust it into the elevator shaft 3 through the exhaust filter 24. Also, the second exhaust section 20B is installed in the elevator car 2 so as to directly suck the air in the elevator car 2 and directly exhaust it into the elevator shaft 3, and sucks the air in the elevator car 2 and exhausts it into the elevator shaft 3 without using a duct.

[0032] The second air supply section 19B is provided with an air supply fan 25 and an air supply filter 26 integrated therewith. The second air supply section 19B is configured to suck air in the elevator shaft 3 by the rotation of the air supply fan 25 and supply the air into the elevator car 2 through the air supply filter 26. Further, the second air supply section 19B is installed in the elevator car 2 so as to directly suck the air in the elevator shaft 3 and directly supply the air into the elevator car 2, and sucks the air in the elevator shaft 3 without using a duct and supplies the air into the elevator car 2.

[0033] As described above, the car ventilation section 5 includes a second air supply section 19B (air supply section) that supplies the air in the elevator shaft 3 into the elevator car 2 through the air supply filter 26, and a second exhaust section 20B (exhaust section) that exhausts the air in the elevator car 2 into the elevator shaft 3 through the exhaust filter 24. Further, the car ventilation section 5 includes a first exhaust section 20A that exhausts without passing through the exhaust filter 24 and a second exhaust section 20B that exhausts through the exhaust filter 24.

[0034] As shown in FIGS. 1 and 2, the car ventilation section 5 is configured to be switchable between a normal car ventilation state and a car increased ventilation state in which the ventilation volume is larger than that in the normal car ventilation state. As shown in FIG. 1, in the normal car ventilation state, the car ventilation section 5 is configured to ventilate the elevator car 2 in such a manner that the first air supply section 19A supplies the air in the elevator shaft 3 into the elevator car 2 and the first exhaust section 20A exhausts the air in the elevator car 2 into the elevator shaft 3. Since the first air supply section 19A and the first exhaust section 20A are not provided with filters, when the car ventilation section 5 is switched to the normal car ventilation state, it supplies air without passing through a filter and exhausts air without passing through a filter.

[0035] Also, as shown in FIG. 2, in the state of increased ventilation for the cage, the cage ventilation section 5 supplies the air in the elevator shaft 3 into the elevator car 2 by the second air supply section 19B, and exhausts the air in the elevator car 2 into the elevator shaft 3 by the second exhaust section 20B, and is configured to ventilate the inside of the elevator car 2. And, since the air supply filter 26 is provided in the second air supply section 19B and the exhaust filter 24 is provided in the second exhaust section 20B, the cage ventilation section 5 supplies air through the air supply filter 26 of the second air supply section 19B and exhausts air through the exhaust filter 24 of the second exhaust section 20B in the state where it is switched to the state of increased ventilation for the cage.

[0036] In the present embodiment, the forced air supply amount by the second air supply section 19B and the forced exhaust amount by the second exhaust section 20B are made larger than the forced exhaust amount by the first exhaust section 20A. Therefore, the cage ventilation section 5 is switched to the normal cage ventilation state by operating the first exhaust fan 22 of the first exhaust section 20A and ventilating by the first air supply section 19A and the first exhaust section 20A, and is configured to be switched to the state of increased ventilation for the cage by operating the air supply fan 25 of the second air supply section 19B and the second exhaust fan 23 of the second exhaust section 20B and ventilating by the second air supply section 19B and the second exhaust section 20B. Incidentally, the forced air supply amount by the second air supply section 19B and the forced exhaust amount by the second exhaust section 20B are set to be the same.

[0037] For example, in the normal cage ventilation state, the ventilation amount per hour is set to about twice the volume of the elevator car 2, and the ventilation amount is such that the inside of the elevator car 2 can be ventilated twice (2 times / h) in one hour. Also, in the state of increased ventilation for the cage, the ventilation amount per hour is set to about twelve times the volume of the elevator car 2, and the ventilation amount is such that the inside of the elevator car 2 can be ventilated twelve times (12 times / h) in one hour. Further, each of the second air supply section 19B, the first exhaust section 20A, and the second exhaust section 20B is provided with an on-off valve (not shown) capable of shutting off ventilation. In the normal ventilation state of the cage, the on-off valve of the first exhaust section 20A is opened, and the on-off valves of the second air supply section 19B and the second exhaust section 20B are closed. In the increased ventilation state of the cage, the on-off valve of the first exhaust section 20A is closed, and the on-off valves of the second air supply section 19B and the second exhaust section 20B are opened. Also, in the present embodiment, as the exhaust filter 24 and the air supply filter 26, filters having a collection effect on viruses and bacteria are used, and specifically, HEPA filters are used.

[0038] As shown in FIG. 2, the second air supply section 19B is installed in the upper part of the elevator cage 2 such as the ceiling of the elevator cage 2 or near the ceiling of the side wall, and the second exhaust section 20B is installed in the lower part of the elevator cage 2 such as the floor of the elevator cage 2 or near the floor of the side wall. In the present embodiment, the second air supply section 19B is installed on the ceiling of the elevator cage 2, and the second exhaust section 20B is installed at the lower end of the side wall of the elevator cage 2. Therefore, in a state where the cage ventilation section 5 is switched to the increased ventilation state of the cage, a downflow in which air flows from the ceiling to the floor is formed in the elevator cage 2, making it difficult for droplets generated by the coughs and sneezes of infected persons to scatter. Also, in a state where the cage ventilation section 5 is switched to the increased ventilation state of the cage, by supplying air from the elevator shaft 3 into the elevator cage 2 through the air supply filter 26, the air in the elevator shaft 3 is purified and supplied into the elevator cage 2. At the same time, by exhausting the air from the elevator cage 2 into the elevator shaft 3 through the exhaust filter 24, it is possible to prevent the elevator shaft 3 from being contaminated by the air exhausted from the elevator cage 2.

[0039] As shown in Fig. 1, the first exhaust part 20A is installed at the upper part of the elevator car 2, such as on the ceiling of the elevator car 2 or near the ceiling of the side wall of the elevator car 2. In the present embodiment, the first exhaust part 20A is installed on the ceiling of the elevator car 2. Therefore, in a state where the car ventilation part 5 is switched to the normal car ventilation state, it is easier to exhaust the hot air or the like accumulated in the upper part of the elevator car 2 into the elevator shaft 3.

[0040] As shown in Fig. 3, the elevator ventilation system 1 includes a detection part 28 for detecting factors causing air quality pollution in the elevator car 2. And the car ventilation part 5 is configured to switch from the normal car ventilation state to the increased car ventilation state as the detection part 28 detects. Further, the car ventilation part 5 is configured to maintain the increased car state until the set conditions are satisfied after the detection part 28 detects, and to switch from the increased car ventilation state to the normal car ventilation state when the set conditions are satisfied. Also, the shaft ventilation part 4 is configured to switch to the normal shaft ventilation state as the car ventilation part 5 switches to the normal car ventilation state, and to switch to the increased shaft ventilation state as the car ventilation part 5 switches to the increased car ventilation state. Note that Fig. 1 shows the normal ventilation state in which the shaft ventilation part 4 is in the normal shaft ventilation state and the car ventilation part 5 is in the normal car ventilation state. Fig. 2 shows the increased ventilation state in which the shaft ventilation part 4 is in the increased shaft ventilation state and the car ventilation part 5 is in the increased car ventilation state.

[0041] In the present embodiment, the factor causing air quality pollution in the elevator car 2 is regarded as an infected person who has boarded the elevator car 2, and the detection part 28 is configured to detect that the infected person has boarded the elevator car 2. Specifically, the detection part 28 is set as a boarding switch S that is operated by the infected person or a person who has boarded with the infected person when the infected person boards the elevator car 2. That is, it is considered that the detection part 28 has detected that the infected person has boarded the elevator car 2 when the boarding switch S is operated when the infected person boards the elevator car 2. Incidentally, as the boarding switch S, a non-contact switch that can be operated by holding a hand in front of it is used.

[0042] [Control Device H] Next, control for switching the ventilation state of the shaft ventilation section 4 and the ventilation state of the cage ventilation section 5 will be described. As shown in FIG. 3, the elevator ventilation system 1 includes a control device H that controls the shaft ventilation section 4 and the cage ventilation section 5.

[0043] The control device H executes normal operation control and increased operation control. In normal operation control, the control device H controls the shaft ventilation section 4 and the cage ventilation section 5 such that the shaft ventilation section 4 is in the normal shaft ventilation state and the cage ventilation section 5 is in the normal cage ventilation state. Further, in increased operation control, the control device H controls the shaft ventilation section 4 and the cage ventilation section 5 such that the shaft ventilation section 4 is in the increased shaft ventilation state and the cage ventilation section 5 is in the increased cage ventilation state.

[0044] Then, the control device H switches from normal operation control to increased operation control as the detection unit 28 detects that an infected person has boarded the elevator car 2. Further, the control device H maintains the increased operation control until the set conditions are satisfied after the detection unit 28 detects, and switches from the increased operation control to the normal operation control when the set conditions are satisfied.

[0045] In the present embodiment, the set condition is that a preset set time has elapsed after the detection unit 28 detects an infected person. The set time is the time obtained by adding the ventilation time required until the ventilation in the elevator car 2 is completed to the boarding time assumed that the infected person is in the elevator car 2. The boarding time can be, for example, the average time required for a person who has boarded the elevator car 2 to get off the elevator car 2, or the moving time required for the elevator car 2 to move from the lowest floor to the highest floor. The ventilation time is set based on the time required to ventilate the elevator car 2 a set number of times. For example, if ventilation is performed 12 times per hour, 5 minutes is set as the time required for one ventilation.

[0046] In addition, when the setting conditions are based on the passage of the set time as described above, it is conceivable that another infected person gets into elevator car 2 before the set time elapses after the infected person gets out of elevator car 2. Even in such a case, in order to ensure proper ventilation of elevator car 2, when the detection unit 28 detects that another infected person has gotten into elevator car 2 after the detection unit 28 detects that an infected person has gotten into elevator car 2 and before the setting conditions are satisfied, the control device H executes a reset process to reset the time elapsed since the previous detection by the detection unit 28.

[0047] Hereinafter, the control of the control device H will be further described based on the flowchart shown in FIG. 4. In a normal state where no infected person is in elevator car 2, the control device H executes normal operation control (step #1). Then, while the control device H is executing normal operation control, it maintains the normal operation control until the detection unit 28 detects that an infected person has gotten into elevator car 2 (in the case of No in step #2), and switches from the normal operation control to the increased operation control as the detection unit 28 detects that an infected person has gotten into elevator car 2 (in the case of Yes in step #2, step #3).

[0048] Also, when the control device H is executing the increased operation control and determines that the preset setting conditions are not satisfied and that an infected person is in elevator car 2 or that ventilation is in progress after the infected person has gotten out of elevator car 2, it maintains the increased operation control (in the case of No in step #4). When it determines that the preset setting conditions are satisfied, the infected person has gotten out of elevator car 2, and ventilation after the infected person has gotten out of elevator car 2 is complete, it switches from the increased operation control to the normal operation control (in the case of Yes in step #4, step #5). Furthermore, when the control device H is executing the increased operation control and the detection unit 28 detects that an infected person has gotten into elevator car 2 before the setting conditions are satisfied, it executes the reset process described above (in the case of No in step #4, Yes in step #6, step #7).

[0049] As described above, in the elevator ventilation system 1 of the present embodiment, when an infected person rides in the elevator car 2, the ventilation unit 5 for the car is switched from the normal ventilation state for the car to the increased ventilation state for the car to increase the ventilation volume for the elevator car 2. Therefore, ventilation in the elevator car 2 can be performed quickly. And by switching the ventilation unit 5 for the car to the increased ventilation state for the car, the amount of air exhausted from the elevator car 2 into the elevator shaft 3 increases, and the elevator shaft 3 is likely to be contaminated. However, in response to the switching of the ventilation unit 5 for the car, the ventilation unit 4 for the shaft is also switched from the normal ventilation state for the shaft to the increased ventilation state for the shaft to increase the ventilation volume for the elevator shaft 3. Therefore, ventilation in the elevator shaft 3 can also be appropriately performed.

[0050] 〔Alternative Embodiment〕 Another embodiment of the present invention will be described. Note that the configurations of each of the embodiments described below are not limited to being applied alone, and can also be applied in combination with the configurations of other embodiments.

[0051] (1) In the above embodiment, as an example of the detection unit 28 that detects an infected person who has boarded the elevator car 2, the configuration of using the boarding switch S operated by a person who has boarded the elevator car 2 has been described. However, it is not limited to such a configuration. For example, the detection unit 28 that detects an infected person who has boarded the elevator car 2 may be a thermometer that detects the body temperature of the infected person, or a receiving unit that receives a signal emitted by the infected person. Incidentally, when the detection unit 28 is a thermometer, the body temperature of a person who has boarded the elevator car 2 is measured by the thermometer, and it may be considered that an infected person who has boarded the elevator car 2 is detected when the thermometer measures a set body temperature (for example, 37 degrees) or higher. Also, when the detection unit 28 is a receiving unit, a signal emitting source such as an RFID tag is previously held by the infected person, and when the infected person boards the elevator car 2, the receiving unit receives the signal emitted by the signal emitting source, and it may be considered that an infected person who has boarded the elevator car 2 is detected when the receiving unit receives the signal.

[0052] (2) In the above embodiment, an example was described in which the air quality pollution factor in the elevator car 2 is an infected person (pollution source) who got into the elevator car 2. However, it is not limited to such a configuration. For example, the air quality pollution factor in the elevator car 2 may be pollutants such as pollen, odors, and carbon dioxide. Incidentally, when a detection unit 28 for detecting pollutants is provided as the detection unit 28, when the amount or concentration of the pollutants detected by the detection unit 28 becomes equal to or higher than the set value, it may be determined that the detection unit 28 has detected the pollutants.

[0053] (3) In the above embodiment, an example was described in which the set condition is that a set time has elapsed since the detection unit 28 detected an infected person. However, it is not limited to such a configuration. For example, when an infected person gets off the elevator car 2, the operation of the landing switch is made such that the set condition is that the ventilation time has elapsed since the landing switch was operated. Also, the set condition may be that the detection unit 28 has stopped detecting an infected person.

[0054] (4) In the above embodiment, a configuration in which both the second air supply unit 19B and the second exhaust unit 20B are provided with filters was described as an example. However, in some cases, a configuration in which only one of the second air supply unit 19B and the second exhaust unit 20B is provided with a filter may be used, or a configuration in which neither the second air supply unit 19B nor the second exhaust unit 20B is provided with a filter may be used.

[0055] (5) In the above embodiment, a configuration was described as an example in which ventilation is performed by the first air supply unit 19A and the first exhaust unit 20A in the normal car ventilation state, and ventilation is performed by the second air supply unit 19B and the second exhaust unit 20B in the increased car ventilation state. However, it is not limited to such a configuration. For example, by changing the forced air supply amount by the second air supply unit 19B and the forced exhaust amount by the second exhaust unit 20B, switching is made between the normal car ventilation state and the increased car ventilation state, and ventilation may be performed by the second air supply unit 19B and the second exhaust unit 20B in any of the normal car ventilation state and the increased car ventilation state.

[0056] (6) In the above embodiment, an example of installing the elevator ventilation system 1 in a hospital has been described. However, the location where the elevator ventilation system 1 is installed may be appropriately changed, such as installing the elevator ventilation system 1 in a manufacturing facility where the elevator hall 8 is part of a clean room.

Explanation of Signs

[0057] 1 Elevator ventilation system 2 Elevator car 3 Elevator shaft 4 Ventilation section for shaft 5 Ventilation section for car 19B Second air supply section (air supply section) 20A First exhaust section 20B Second exhaust section (exhaust section) 26 Air supply filter 28 Detection section

Claims

1. A shaft ventilation unit for ventilating an elevator shaft in which an elevator car moves up and down, and a car ventilation unit for ventilating the elevator car by supplying air in the elevator shaft into the elevator car and exhausting air in the elevator car into the elevator shaft, wherein the car ventilation unit is configured to be switchable between a normal car ventilation state and a car increased ventilation state in which the ventilation volume is larger than that in the normal car ventilation state, wherein the shaft ventilation unit is configured to switch to a normal shaft ventilation state as the car ventilation unit switches to the normal car ventilation state, and to switch to a shaft increased ventilation state in which the ventilation volume is larger than that in the normal shaft ventilation state as the car ventilation unit switches to the car increased ventilation state, wherein the car ventilation unit includes a first air supply unit that supplies air without passing through an air supply filter and a second air supply unit that supplies air through the air supply filter, and is configured to supply air through the first air supply unit in a state where it is switched to the normal car ventilation state and to supply air through the second air supply unit in a state where it is switched to the car increased ventilation state. An elevator ventilation system.

2. A shaft ventilation unit for ventilating an elevator shaft in which an elevator car moves up and down, and a car ventilation unit for ventilating the elevator car by exhausting air in the elevator car into the elevator shaft, wherein the car ventilation unit is configured to be switchable between a normal car ventilation state and a car increased ventilation state in which the ventilation volume is larger than that in the normal car ventilation state, wherein the shaft ventilation unit is configured to switch to a normal shaft ventilation state as the car ventilation unit switches to the normal car ventilation state, and to switch to a shaft increased ventilation state in which the ventilation volume is larger than that in the normal shaft ventilation state as the car ventilation unit switches to the car increased ventilation state, wherein the car ventilation unit includes a first exhaust unit that exhausts air without passing through an exhaust filter and a second exhaust unit that exhausts air through the exhaust filter, and is configured to exhaust air through the first exhaust unit in a state where it is switched to the normal car ventilation state and to exhaust air through the second exhaust unit in a state where it is switched to the car increased ventilation state. An elevator ventilation system.

3. Comprising a detection unit for detecting factors causing air quality pollution in the elevator car The elevator ventilation system according to claim 1 or 2, wherein the ventilation section for the car is configured to switch from the normal car ventilation state to the increased car ventilation state as the detection section detects.

4. The elevator ventilation system according to claim 3, wherein the ventilation section for the car is configured to maintain the increased car ventilation state until the set conditions are satisfied after the detection section detects, and to switch from the increased car ventilation state to the normal car ventilation state when the set conditions are satisfied.

5. The elevator ventilation system according to claim 3 or 4, wherein the detection section is configured to detect that an infected person has boarded the elevator car.

6. The elevator ventilation system according to any one of claims 1 to 5, wherein the ventilation section for the car includes an air supply section that supplies air in the elevator shaft into the elevator car through an air supply filter, and an exhaust section that exhausts air in the elevator car into the elevator shaft through an exhaust filter. In a state where it is switched to the increased car ventilation state, it is configured to supply air through the air supply filter of the air supply section and to exhaust air through the exhaust filter of the exhaust section.

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