JP2780930B2 - Outside air treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outside air treatment facility for taking in and supplying outside air to an office or a kitchen.

[0002]

2. Description of the Related Art When supplying outside air to an office, a kitchen, or the like, a facility is adopted in which the taken in outside air is heated by a heating coil (or a hot water coil) in the middle of a duct.
Generally, a heat source for heating the entire building (for example, a boiler or the like, and generated hot water is supplied to the coil as a heating medium) is used as a heat source for heating the heating coil.
When the heat source device is stopped in winter, the outside air temperature enters through the outside air intake and comes into contact with the heating coil. As a result, the heating coil may be frozen and the heating coil may be ruptured. Therefore, in the related art, a motor damper is provided in a stage preceding the heating coil to prevent rupture, and a mechanism that opens the damper only when the heating coil is operated is adopted.

[0003] However, even with such a configuration, there are cases in which rupture cannot be avoided. Therefore, a tape-shaped electric heater is attached to the heating coil, or a heat source for supplying hot water to the heating coil for 24 hours is secured to prevent freezing.

[0004]

However, in the above-mentioned prior art, even a heat source device which uses only about 8 to 10 hours per day except winter is forced to operate for 24 hours in winter, thus reducing running costs. It increases energy consumption and wastes energy. Further, when the heat source is stopped, the heating coil is ruptured, resulting in serious damage.

Accordingly, an object of the present invention is to provide an outside air treatment facility which can prevent freezing of a heating coil in winter and can reduce running costs and save energy.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an air supply fan which is disposed in a duct, takes in outside air into the duct, and blows air to an air supply target area in a building. A heating coil provided in the duct to heat the taken-in outside air as necessary, and a pair of indoor units and outdoor units installed for heating and cooling the supply target area or other areas, A refrigerant pipe for connecting a pair of indoor units and an outdoor unit, wherein the heating coil is connected to the refrigerant pipe, and the duct has an air volume for adjusting an intake amount of outside air. The adjustment damper is provided so that the opening thereof can be manually adjusted, and the pair of indoor units and outdoor units are configured to be independently operable separately from driving the air supply fan.

[0007]

In the above invention, the heating coil provided in the middle of the duct for guiding the outside air to the air supply target area such as the kitchen of the building is connected to the refrigerant pipe connecting the pair of the indoor unit and the outdoor unit. Then, the refrigerant of the outdoor unit is supplied to the heating coil.
Therefore, the heating coil is not affected even in a low-temperature atmosphere, and freezing of the heating coil due to the outside air temperature is prevented. In addition, the refrigerant of the outdoor unit for heating and cooling is supplied to the heating coil, and the outside air is heated by using the heat exchange of the supplied refrigerant in the heating coil. Therefore, a heat exchange source dedicated to the heating coil is provided. No need. In addition, since the air flow adjusting damper is provided in the duct so that the opening thereof can be manually adjusted, the intake amount of the outside air can be arbitrarily set by manually adjusting the opening. Furthermore, since the pair of indoor units and outdoor units are installed so as to be able to operate independently of the driving of the air supply fans, the warming by the combination of the driving of the air supply fans and the operation of the pair of indoor units and outdoor units is performed. Cooling becomes possible, and independent operation of only a pair of indoor units and outdoor units becomes possible.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an outside air treatment facility according to the present invention.

A gallery 2 for taking in outside air is mounted on the outer wall of the ceiling of the building 1, and a chamber box 3 for an air supply duct is arranged in the ceiling in connection with the gallery 2. Further, an air supply duct 4, a motor damper 5 using a motor as a driving source, a heating coil 6, an air volume adjusting damper 7, and an air supply fan 8 are connected in series to the chamber box 3 in this order. Further, at the subsequent stage of the air supply fan 8, air outlets 9, 10, and 11 for guiding air supply to the room (the air supply target area) (the number is not limited to three, but the size of the room, etc.) Increase / decrease) are linked.

As the heating coil 6, an air-cooled heat pump type air-conditioning unit of a duct connection type is used. The reason for this is that a heating / cooling outdoor unit is used as a heat exchange medium source as described later. In addition, the air volume adjustment damper 7
The structure which can adjust a damper opening degree manually is adopted. Further, a lattice plate, a punched iron plate, or the like is provided on the ceiling surface of each of the air outlets 9 to 11 in consideration of decoration.

On the other hand, a piping 12 is connected to the heating coil 6, and a heating / cooling air conditioner (indoor unit) 13 and a heating / cooling outdoor unit (outdoor unit) 14 are connected in parallel to the other end through the piping. . The heating / cooling air conditioner 13 is provided near an indoor ceiling, and the heating / cooling outdoor unit 14 is provided on the ground facing an outdoor wall. The outdoor unit 14 for heating and cooling functions not only as a part of an air conditioner for heating and cooling in a kitchen or the like, but also as a refrigerant supply source for the heating coil 6. By using the heating / cooling outdoor unit 14, there is no need to provide a dedicated heat exchange source for the heating coil 6, and the equipment configuration can be simplified.

Next, a description will be given of a method of operating the outside air processing equipment having the above configuration. First, when the motor is stopped, the motor damper 5 is closed, so that the outside air is isolated from the heating coil 6 and thereafter. By closing the motor damper 5, it is possible to prevent the invasion of the outside air through the rattle 2 and to prevent the invasion of insects and the like.

When the air supply fan 8 is energized in a state where the motor damper 5 is closed, the motor damper 5 operates in conjunction with the supply of the air supply fan 8, and the opening of the damper 5 becomes 100%. In this state, when the air supply fan 8 is driven, the outside air is sucked through each of the galley 2, the chamber box 3, the air supply duct 4, the motor damper 5, the heating coil 6, and the air volume adjustment damper 7. At this time, the outside air intake amount is
It can be arbitrarily set by manually adjusting the opening of the air volume adjusting damper 7.

During this driving, if the outside air temperature is low and the wind blown from the outlets 9 to 11 feels cold as in winter, the switch of the air conditioning unit related to the heating coil 6 is manually or automatically (non-automatic). It is turned "on" by the operation of the illustrated temperature sensor). By this operation, the outdoor unit 14 for heating and cooling is driven, the refrigerant in the pipe 12 circulates in the heating coil 6, and the inside of the heating coil 6 is heated. Heat is exchanged when the outside air passes through the coil portion in the heating coil 6, and the outside air passing near the coil portion is heated. The heated air is blown out of the outlets 9 to 11 into the room.

The heating / cooling air conditioner 13 and the heating / cooling outdoor unit 14 can be driven irrespective of whether the motor damper 5 and the air supply fan 8 are stopped, and cooling / heating can be performed by a combination of both. In this case, the motor damper 5
If the air supply fan 8 is stopped, the outside air is not taken in, and the circulating air is heated, cooled, or dehumidified while circulating the indoor air.

As described above, according to this embodiment, since the medium supplied to the heating coil 6 is a refrigerant, the heating coil 6 is not affected even in a low-temperature atmosphere, and the heating coil 6 is cooled by outside air. No freezing occurs. Therefore, the heating coil 6
It does not lead to rupture.

Also, a motor damper 5 for treating outside air is provided.
Since the heating / cooling air conditioner 13 and the heating / cooling outdoor unit 14 can be independently operated independently of the air supply fan 8 and the like, as described above, the driving of the air supply fan 8 and the heating / cooling air conditioner In addition to heating and cooling the room by the combination with the heating and cooling outdoor unit 14, it is also possible to heat and cool the room by solely operating the heating and cooling air conditioner 13 and the heating and cooling outdoor unit 14 alone. In other words, heating and cooling that need to take in outside air,
Since it is possible to select heating and cooling that does not require intake of outside air, energy can be saved and running costs can be reduced.

Further, since the air flow adjusting damper 7 is provided so that the opening thereof can be manually adjusted, the amount of outside air to be taken can be arbitrarily set according to the type of room to be taken in, for example, an office or a kitchen. can do.

Further, the heating coil 6 is connected to the pipe 12 connecting the heating / cooling air conditioner 13 and the heating / cooling outdoor unit 14, and the heating / cooling outdoor unit 14 is diverted to the refrigerant supply source. 6. It is not necessary to provide a dedicated heat exchange source, and only one heating / cooling outdoor unit 14 is required. Therefore, the facility cost can be reduced by simplifying the facility configuration, and the heating coil 6 can be reduced in size.

In the above embodiment, the heating / cooling air conditioner 13 and the heating / cooling outdoor unit 14 are associated with the outside air processing equipment for the same room as the room in which they are installed. The outdoor unit for heating and cooling provided for the room may be used.

[0021]

As described above, according to the outside air processing equipment of the present invention, the heating coil provided in the middle of the duct for guiding the outside air to the air supply target area of the building has a pair of the indoor unit and the outdoor unit. The cooling coil is connected to the refrigerant pipe, and the refrigerant of the outdoor unit is supplied to the heating coil, so that the freezing of the heating coil due to the outside air temperature can be prevented. In addition, since the outdoor unit is diverted as the coolant supply source, it is not necessary to provide a heat exchange source dedicated to the heating coil, so that the size of the heating coil can be reduced. Further, since the air flow adjusting damper is provided in the duct so that the degree of opening thereof can be manually adjusted, the intake amount of the outside air can be arbitrarily set according to the supply target area for taking in the outside air. Further, since the pair of indoor units and the outdoor units are installed so as to be able to operate independently of the driving of the air supply fan, the outside air generated by the combination of the driving of the air supply fan and the operation of the pair of indoor units and outdoor units is provided. Can be selected between heating and cooling in which the air conditioner has been taken in, and single operation (interim operation) in which it is not necessary to take in outside air only in a pair of the indoor unit and the outdoor unit. Therefore, energy saving and running cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an outside air treatment facility according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Building 4 Air supply duct 6 Heating coil 7 Air volume adjustment damper 8 Air supply fan 12 Piping 13 Heating / cooling air conditioner 14 Heating / cooling outdoor unit

Claims (1)

(57) [Claims] 1. An air supply fan disposed in a duct to take in outside air into the duct and blow it to an air supply target area in a building, and heats the external air taken in provided in the duct as necessary. A heating coil, a pair of indoor units and outdoor units installed for heating and cooling the supply target area or another area, and a refrigerant pipe connecting the pair of indoor units and outdoor units, The outside air treatment equipment in which the heating coil is connected to the refrigerant pipe, wherein the duct is provided with a flow rate adjustment damper for adjusting an intake amount of outside air, the opening of which is manually adjustable. The outdoor air processing equipment, wherein the pair of indoor units and outdoor units are installed so as to be able to operate independently of the driving of the air supply fan.