JPH06239540A - Cooling equipment for elevator cage - Google Patents

Abstract

PURPOSE:To provide an inexpensive cooling equipment which is designed not to lower elevator service even when an air-conditioner is brought to a stop because of a drain tank being filled with drain. CONSTITUTION:Through cooling operation, cold air is fed to an elevator cage 10 and simultaneously with cooling of the interior of the elevator cage 10, the interior of the elevator cage 10 can be ventilated. Further, when a water level in a drain tank 15 is raised to a given value, or when the temperature of the interior of the elevator cage 10 is reduced to a value lower than a given temperature, cooling operation is stopped and the interior of the elevator cage 10 is ventilated, so that the interior of the small elevator cage 10 is not full of a smell, such as a boy smell, to give the passengers an unpleasant feeling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car cooling device provided in an elevator car for cooling the inside of the elevator car, and more particularly to an elevator car cooling device having a drain tank for storing condensed water. It is about.

[0002]

2. Description of the Related Art As a technique relating to an elevator car cooling device for cooling the inside of an elevator car provided in a conventional elevator car, there is a technique disclosed in Japanese Patent Laid-Open No. 3-195686.

That is, an air conditioner provided in an elevator car, which is operated when the drain tank is not full, and which is stopped when a power failure or when the drain tank is full, and an air conditioner provided in the elevator car, which is operated by turning on a ventilation switch. It is equipped with a suction type ventilation fan. As a result, when the air conditioner is stopped at the time of a power failure and the drain tank is full of water, or when the air conditioner is stopped due to a failure, the intake switch is operated by turning on the ventilation switch. .

[0004]

However, the air conditioner for elevator car disclosed in the above publication is stopped when the drain tank of the air conditioner is full and the intake switch is operated by turning on the ventilation switch. Therefore, a person who knows that the inhalation type ventilation fan operates when the elevator car is not cooled is operated by operating the ventilation switch to operate the ventilation fan. However, people who do not know the operation receive service by the elevator without cooling the elevator car, which leads to deterioration of service. Further, it is necessary to prepare a ventilation fan separate from the air conditioner, it is necessary to secure an installation area for the air conditioner and the ventilation fan, and the cost becomes expensive.

Therefore, an object of the present invention is to provide an air conditioner cooling system for an elevator car, which does not deteriorate the service of the elevator even if the air conditioner is stopped due to full water in the drain tank, and which is inexpensive. It is a thing. Further, another object of the present invention is to provide a cooling device for an elevator car which has a good efficiency of the air conditioner.

[0006]

An elevator car air conditioner according to a first aspect of the present invention performs heat exchange with a cooling operation in which a refrigerant from an outdoor unit is heat-exchanged and the cooled outside air is sent into the elevator car. Detects the indoor unit installed in an elevator car that can ventilate the outside air directly into the elevator car without any action, a drain tank that stores condensed water discharged from the indoor unit, and the water level in the drain tank A float switch is provided, and when the float switch detects a predetermined water level, the cooling operation of the indoor unit is denied and the operation is switched to the ventilation operation.

According to a second aspect of the present invention, there is provided a cooling system for an elevator car, wherein the cooling operation is performed by receiving the refrigerant from the outdoor unit and exchanging heat to cool the outside air and sending the cooled outside air into the elevator car. An indoor unit that can be ventilated and sent into the car, a duct that guides the elevator car from the indoor unit, a drain tank that stores condensed water discharged from the indoor unit, and condensed water discharged from the drain tank. In order to reduce the water level, there is provided humidifying means arranged at the exhaust port of the outdoor unit for humidifying the outside air, and the indoor unit is mounted above the outdoor unit.

[0008]

In the first aspect of the present invention, in the cooling operation state, the outside air cooled by receiving the refrigerant from the outdoor unit and exchanging heat is sent into the elevator car to cool the inside of the elevator car. At this time, when the float switch that detects the water level in the drain tank that stores the condensed water discharged from the indoor unit detects a predetermined water level, the cooling operation of the indoor unit is stopped, and the ventilation operation is switched to the direct outside air. Is sent to the inside of the elevator car without heat exchange, and the ventilation operation inside the elevator car is performed.Even if the cooling operation is stopped, the ventilation operation can be performed, the inside of the elevator car is ventilated, and Gives a refreshing feeling.

According to the second aspect of the present invention, the condensed water is collected in the drain tank discharged from the indoor unit by the cooling operation in which the outside air cooled by receiving the refrigerant from the outdoor unit and exchanging heat is sent into the elevator car. The condensed water collected in the drain tank humidifies the outside air by the humidifying means arranged at the exhaust port of the outdoor unit. At this time,
Since the indoor unit is mounted above the outdoor unit that humidifies the outside air, the probability that humidified air will be sucked into the indoor unit and enter the elevator car can be reduced.

[0010]

EXAMPLES Examples of the present invention will be described below. FIG. 1 is an explanatory diagram showing a main configuration of a cooling system for an elevator car according to an embodiment of the present invention. FIG. 2 is a circuit diagram for switching the cooling operation and the blowing operation of the elevator car cooling apparatus according to the first embodiment of the present invention.

In FIG. 1, 20 is an elevator car 10.
Installed in the upper part of the elevator, a refrigerant coil as an evaporator, air is taken in from the outside during cooling operation, and the taken air is cooled by heat exchange, and the elevator car 1
A well-known indoor unit having a blower that blows air into 0 and blows air during a blowing operation, 11 is located close to the indoor unit 20 and at a position lower than the indoor unit 20, and is attached to the upper part of the elevator car 10. , Compressor,
This is a known outdoor unit that includes a condenser and a blower 11a that guides outside air to the condenser. The indoor unit 20 and the outdoor unit 11 are attached to an elevator frame 21 to which the elevator car 10 is attached.

Reference numeral 12 is a duct that guides the cold air generated in the indoor unit 20 or the air blown from the outside air into the elevator car 10, and 13 is a refrigerant pipe for connecting the indoor unit 20 and the outdoor unit 11. 15 is an outdoor unit 2
The drain tank 16 stores the condensed water generated at 0, and 16 is a hose that guides the condensed water to the drain tank 15. Also,
Reference numeral 14 is a humidifying element for reducing the water level of the condensed water discharged from the drain tank 15 so as to increase the saturated steam pressure of the outside air. The humidifying element 14 is a humidifying hose formed of a flat porous cloth. It is attached so as to face the front surface of the exhaust port of the outdoor unit 11 and is vaporized or atomized by the blower 11a that guides the outside air to the condenser. Reference numeral 17 is a hose that guides the condensed water stored in the drain tank 15 to the humidification element 14.
Further, 18 is a float switch arranged in the drain tank 15 to detect a predetermined water level, and 19 is a temperature sensor installed in the elevator car 10.

In FIG. 2, reference numeral 1 denotes a contact of the temperature sensor 19, which is a normally open contact which is closed when the temperature inside the elevator car 10 exceeds a set temperature. 2 is float switch 1
8 is a normally closed contact that is closed when the water level in the drain tank 15 is below a predetermined level. These temperature sensors 19
The normally open contact 1 and the normally closed contact 2 of the float switch 18 are connected in series. Further, 8 is a control means including a microcomputer or the like which constitutes a known air conditioner. The normally open contact 1 of the temperature sensor 19 and the normally closed contact 2 of the float switch 18 constitute the operation switching means of this embodiment.

Next, the operation of the elevator car cooling apparatus having the above-described structure will be described. Since the control means 8 constituting the operation switching means is known as an elevator car cooling device, detailed description thereof will be omitted here. First, in the cooling operation state, the refrigerant from the outdoor unit 11 is received by the indoor unit 20 via the pipe 13, and heat is exchanged there to cool the air obtained from the outside, and the cooled outside air is passed through the duct 12 to the elevator. Send it into the basket 10,
The inside of the elevator car 10 is cooled and the inside of the elevator car 10 is ventilated. This gives the passenger a refreshing feeling. At this time, the output of the temperature sensor 19 inputs an ON / OFF signal to the control means 8 including a microcomputer or the like so as to maintain the inside of the elevator car 10 at a predetermined temperature.

In this cooling operation state, the indoor unit 2
The condensed water discharged from 0 is stored in the drain tank 15 via the hose 16. The water level of the condensed water stored in the drain tank 15 is detected by the float switch 18. Condensed water stored in the drain tank 15 is stored in the hose 1
7 to the humidification element 14. In the humidifying element 14 formed by flattening the porous cloth, the outside air that is vaporized or atomized by the blower 11a that guides the outside air to the condenser, and the saturated vapor pressure is increased by vaporization or atomization,
It is delivered outward from the humidification element 14. But,
The outside air whose saturated water vapor pressure is increased by vaporization or atomization falls downward due to its weight, and is not caught in the outside air intake port direction of the indoor unit 20.

Further, in the cooling operation state, the water level of the condensed water discharged from the indoor unit 20 and stored in the drain tank 15 reaches a predetermined height, and when the float switch 18 for detecting the predetermined water level operates, The operation switching means of the embodiment is turned off by the normally closed contact 2 of the float switch 18 without depending on the on / off state of the normally open contact 1 of the temperature sensor 19, and the indoor unit 20 suspends the cooling operation and performs ventilation. The operation is started, and the outside air is directly sent to the elevator car 10 without heat exchange, and the elevator car 10
Ventilate the inside. Of course, immediately after the float switch 18 operates, even if the cooling operation is stopped, the cooling operation can be performed for a while due to the capacity of the refrigerant and the heat exchanger.

Therefore, when the float switch 18 is operated in the cooling operation state, the operation switching means stops the cooling operation and the ventilation operation can be performed. Therefore, in the elevator car cooling device of the present embodiment, the cooling air is sent into the elevator car 10 by the cooling operation, and the inside of the elevator car 10 can be ventilated together with the cooling inside the elevator car 10. When the inside of the drain tank 15 reaches a predetermined water level, or when the elevator car 1
When the temperature in 0 becomes equal to or lower than the predetermined temperature, the cooling operation is stopped, ventilation in the elevator car 10 is performed, and a odor such as body odor is contained in the narrow elevator car 10 to make passengers uncomfortable. There is nothing to give.

Further, the operation switching means can be configured as a circuit as shown in FIG. FIG. 3 is a circuit diagram for switching the cooling operation and the blowing operation of the elevator car cooling apparatus according to the second embodiment of the present invention. In FIG. 3, reference numeral 1 denotes a contact point of the temperature sensor 19, which is a normally open contact point that is closed when the temperature inside the elevator car 10 exceeds a set temperature. Reference numeral 2 denotes a contact of the float switch 18, which is a normally closed contact that is closed when the water level in the drain tank 15 is below a predetermined level. Reference numeral 3 denotes a relay, which has a normally open contact 5 for issuing a command for cooling operation and a normally closed contact 6 for issuing a command for blowing operation. The normally open contact 1 of the temperature sensor 19 and the normally closed contact 2 of the float switch 18 are connected in series with a relay 3 and a power supply 4. Further, 8 is a control means including a microcomputer or the like which constitutes a known air conditioner. The normally open contact 1 of the temperature sensor 19, the normally closed contact 2 of the float switch 18, the relay 3 and the normally open contact 5 for instructing the cooling operation, and the normally closed contact 6 for instructing the blow operation are the present embodiment. It constitutes the operation switching means.

In the operation switching means of the present embodiment thus constructed, the normally open contact 1 is closed when the temperature in the elevator car 10 is equal to or higher than a predetermined temperature, and the drain tank 15 is also provided.
When the water level inside is below a predetermined water level, the normally closed contact 2 is closed, and by the operation of the normally open contact 5 that issues a command for cooling operation,
The relay 3 gives an instruction for cooling operation by a signal from the normally open contact 5 input to the control means 8. When the water level in the drain tank 15 reaches a predetermined level, the normally closed contact 2 is opened, and ventilation is performed by the signal from the normally closed contact 6 input to the control means 8 regardless of the operation of the normally open contact 5 that issues a command for cooling operation. Gives driving commands. Therefore, the operation is similar to that of the first embodiment.

The elevator car air conditioner of this embodiment is
An outdoor unit 11 mounted on the elevator car 10,
A cooling operation in which the refrigerant from the outdoor unit 11 is received and heat exchanged, and the cooled outside air is sent into the elevator car 10.
An indoor unit 20 mounted on the elevator car 10 capable of performing ventilation operation to directly send outside air into the elevator car 10 without heat exchange, a drain tank 15 for storing condensed water discharged from the indoor unit 20, and a drain tank Float switch 18 for detecting the water level in 15, and when the float switch 18 detects a predetermined water level, the normally open contact 1 and the float switch 18 of the temperature sensor 19 for denying the cooling operation of the indoor unit 20 and switching to the ventilation operation. The operation switching means including the normally-closed contact 2 is provided, which can be the invention of claim 1.

Therefore, by the cooling operation, the cool air is sent into the elevator car 10 and the inside of the elevator car 10 can be ventilated together with the cooling inside the elevator car 10. Further, when the drain tank 15 reaches a predetermined water level, or when the temperature inside the elevator car 10 becomes below a predetermined temperature, the cooling operation is stopped and the elevator car 10 is ventilated. Narrow elevator car 1
There will be no odor such as body odor within 0, which will not give passengers any discomfort. In addition, even if the cooling temperature cannot be maintained in the elevator car 10, the temperature is suppressed to the outside temperature,
It is possible to prevent heat from staying inside the elevator car.

The elevator car air conditioner of this embodiment is the outdoor unit 1 mounted on the elevator car 10.
1, heat exchange with the refrigerant from the outdoor unit 11,
Cooling operation in which cooled outside air is sent into the elevator car 10, and outside air is directly sent to the elevator car 1 without heat exchange.
The indoor unit 20 mounted on the upper part of the elevator car 10 than the indoor unit 20 capable of ventilating operation to be sent to 0, and the indoor unit 2 during cooling operation or ventilation operation
The duct 12 that guides the outside air taken in by the 0 from the outside to the elevator car 10 from the indoor unit 20 and the indoor unit 2
A drain tank 15 for storing condensed water discharged from 0,
The outdoor unit 1 that humidifies the outside air in order to reduce the water level of the condensed water discharged from the drain tank 15.
And a humidifying means arranged at the exhaust port of No. 1, which can be the invention of claim 2.

Therefore, in the cooling operation state, the condensed water discharged from the indoor unit 20 and stored in the drain tank 15 is guided to the humidification element 14, where it is vaporized or atomized by the blower 11a for guiding the outside air to the condenser. The outside air, which has been vaporized and whose saturated vapor pressure has been increased by vaporization or atomization, is sent outward from the humidification element 14.
At this time, the outside air whose saturated vapor pressure has been increased by vaporization or atomization falls downward from its weight and is not caught in the direction of the outside air intake port of the indoor unit 20, so that the cooling efficiency is high and the elevator car is high. The outside air does not enter the inside of the humidifying element 14 from the humidifying element 14 in the outward direction.

By the way, in the embodiment of the above-mentioned claim 1, the outdoor unit 11 mounted on the elevator car 10 and the refrigerant from the outdoor unit 11 are exchanged for heat and the cooled outside air is sent into the elevator car 10. An embodiment in which an indoor unit 20 mounted in the elevator car 10 capable of performing a cooling operation and a ventilation operation of directly sending the outside air into the elevator car 10 without heat exchange, the indoor unit 20 and the outdoor unit 11 are separated from each other However, when the present invention is carried out, the present invention is not limited to this embodiment, and both may be integrated, so long as it has a function as an air conditioner. Good.

In each of the above embodiments, when the float switch 18 detects a predetermined water level, the indoor unit 20
The operation switching means for denying the cooling operation and switching to the ventilation operation is implemented as the operation switching means including the normally open contact 1 of the temperature sensor 19 and the normally closed contact 2 of the float switch 18, but the present invention is implemented. In this case, when the float switch 18 detects a predetermined water level, it may have a function of, as a result, denying the cooling operation of the indoor unit 20 and switching to the ventilation operation.

[0026]

As described above, in the elevator car air conditioner according to the first aspect of the present invention, the float switch for detecting the water level in the drain tank for accumulating the condensed water discharged from the indoor unit sets the predetermined water level. When it detects it, it stops the cooling operation of the indoor unit, switches to ventilation operation, and sends the outside air directly into the elevator car without heat exchange, and the ventilation operation inside the elevator car can be performed, so the cooling operation stops. Even so, the ventilation operation can ventilate the inside of the elevator car to give passengers a refreshing feeling. Also,
Specially for ventilating the inside of the elevator car as before,
Since it is not necessary to prepare a dedicated ventilation fan, the device is inexpensive.

According to the second aspect of the present invention, the condensed water is collected in the drain tank discharged from the indoor unit by the cooling operation in which the outside air cooled by receiving the refrigerant from the outdoor unit and exchanging heat is sent to the inside of the elevator car. The condensed water accumulated in the tank humidifies the outside air by the humidifying means arranged at the exhaust port of the outdoor unit. At this time,
Since the indoor unit is installed above the outdoor unit that humidifies the outside air, it is possible to reduce the probability that humidified air will be sucked into the indoor unit and enter the elevator car, thus improving the efficiency of the air conditioner. Can be

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a main configuration of an air conditioner for an elevator car according to an embodiment of the present invention.

FIG. 2 is a circuit diagram for switching between a cooling operation and a blowing operation of the elevator car cooling apparatus according to the first embodiment of the present invention.

FIG. 3 is a circuit diagram for switching between a cooling operation and a blowing operation of the elevator car cooling device according to the second embodiment of the present invention.

[Explanation of symbols]

 1 Normally open contact of temperature sensor 2 Normally closed contact of float switch 10 Elevator car 11 Outdoor unit 12 Duct 14 Humidifying element (humidifying means) 15 Drain tank 18 Float switch 19 Temperature sensor 20 Indoor unit

Claims (2)

[Claims] 1. An outdoor unit mounted in an elevator car, a cooling operation in which heat is exchanged by receiving a refrigerant from the outdoor unit and the cooled outdoor air is sent into the elevator car, and an outdoor air is directly supplied without heat exchange. An indoor unit mounted on an elevator car capable of ventilating operation to be sent into an elevator car, a drain tank for storing condensed water discharged from the indoor unit, a float switch for detecting a water level in the drain tank, and An elevator car air conditioner, comprising: an operation switching means for denying a cooling operation of the indoor unit and switching to a ventilation operation when the float switch detects a predetermined water level. 2. An outdoor unit mounted in an elevator car, a cooling operation in which heat is exchanged by receiving a refrigerant from the outdoor unit and the cooled outdoor air is sent into the elevator car, and the outdoor air is directly exchanged without heat exchange. An indoor unit mounted on the upper part of the elevator car than the indoor unit capable of ventilating operation to be sent into the elevator car, and outside air taken in from the outside by the indoor unit during the cooling operation or the ventilation operation, A duct that guides the elevator car from the unit, a drain tank that stores condensed water discharged from the indoor unit, and an outdoor unit that humidifies the outside air to reduce the water level of the condensed water discharged from the drain tank And a humidifying means arranged at the exhaust port of the elevator car.