JPH01314831A - Humidity regulation type atmospheric air conditioner - Google Patents

Abstract

PURPOSE:To improve dehumidifying effect in a simple structure, to eliminate reheating energy and excess low temperature air feeding and to prevent unpleasant feeling by providing a cooler for cooling to dehumidify the atmospheric air, and a mixture chamber for mixing the atmospheric air with the air from the cooler. CONSTITUTION:The atmospheric air is sucked into a sucking chamber 3 as designated by an arrow 1, and then arrived at an atmospheric air regulating damper 5 and a cooling regulating damper 6 through a filter 4. The air arrived at a cooler 7 through the damper 6 is cooled and dehumidified, and then fed toward a mixture chamber 10 as designated by an arrow M. The air from the damper 5 is fed toward the chamber 10 as it is as designated by an arrow N. A partition plate 8 isolates the atmospheric air stream of the arrow N from the cooler 7. The openings of the dampers 5, 6 are regulated to control the mixture ratio of the cooled and dehumidified air from the cooler 7 with the atmospheric air.

Description

[Detailed Description of the Invention] The present invention relates to a humidity-adjustable outside air conditioner, and more particularly to a method for adjusting humidity by mixing outside air with air that has been subjected to cooling and dehumidification treatment on a portion of the outside air. This invention relates to a humidity-controlled outdoor air conditioner.

From the perspective of air conditioning the entire building, the method of installing an air conditioner (hereinafter referred to as air conditioning) indoors that processes both the heat load inside the building and the heat load of the outside air is expensive and reduces air transportation. This is disadvantageous in terms of duct space, etc. For this reason, a small air conditioner such as a fan coil is installed indoors to handle the indoor load.
An air conditioning system is used in which an outside air-only air conditioner, that is, an outside air conditioner is separately provided to handle the outside air load.

Referring to FIG. 1, in the conventional outside air conditioner 1, outside air is sucked in by a blower 9 as shown by arrow I, cooled by a cooler 7, and then sent into the room as shown by arrow F.

However, the conventional outside air conditioner 1, which sends the output of the cooler 7 directly into the room, has little dehumidification effect.

For this reason, when the outside air becomes hot and humid in the summer, it is impossible to avoid an increase in indoor humidity, which has the disadvantage that discomfort cannot be prevented. For example, by using the cooler 7 having the characteristics shown in FIG.
0% outside air along the line PI to the desired room temperature, e.g. 26°C
When the air is cooled to
The relative humidity increases to 85% as shown at point B, causing discomfort.

In order to avoid this drawback, the temperature of the air at the outlet of the outside air conditioner 1 is set several degrees lower than the required room temperature, but this results in the inconvenience that the indoor temperature drops too much and causes discomfort.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an outdoor air conditioner that can highly control the dehumidification effect, thereby solving the above-mentioned drawbacks and inconveniences of the prior art.

11+. Referring to the embodiment shown in FIG. 1, the humidity-controlled outdoor air conditioner 1 according to the present invention includes a cooler 7 that cools and dehumidifies outside air, and a cooler 7 that cools and dehumidifies outside air. A configuration including a mixing chamber 10 for mixing is used.

The operation of the above embodiment will be explained with reference to FIG. For example, the air from the cooler 7 and the outside air are mixed in a mixing chamber lO at a ratio of 1:2.
When mixing at point A, the cooler 7 lowers the temperature 3 at point A.
3°C1 relative humidity) (REiO%) If outside air is cooled along line P2 to a point C with a temperature of 12°C and a humidity of 95%, the state of the air at the outlet of the outside air conditioner 1 is indicated by a dot. The temperature is 26°C and the humidity is 73%. Therefore, the amount of dehumidification in this case is 4 per kg of air.
g (-19-15 g/kg'), and a dehumidification rate four times that of the conventional example shown in FIG. 2 can be obtained. If a cooler 7 capable of cooling to a lower temperature is used, it becomes possible to dehumidify the − layer.

Therefore, the objective of the present invention, which is to provide an outdoor air conditioner that can highly control the dehumidification effect, is achieved.

[Mitate] FIG. 1 shows the configuration of an embodiment of the present invention. After the outside air is sucked into the intake chamber 3 as shown by arrow I, it is passed through the filter part 4 to the outside air adjustment damper 5 and the cooling adjustment damper 6.
reach. The air that has passed through the cooling adjustment damper 6 and reached the cooler 7 is subjected to cooling and dehumidification treatment from the cooler 7, and then flows toward the mixing chamber 10 as shown by arrow M. The outside air from the outside air adjustment damper 5 flows directly toward the mixing chamber 10 as shown by arrow N. Partition plate 8 separates the outside air flow indicated by arrow N from cooler 7 . By adjusting the opening degree of the outside air adjustment damper 5 and the opening degree of the cooling adjustment damper 6, the mixing ratio of the cooled and dehumidified air from the cooler 7 and the outside air can be controlled.

Although the cooler 7 in the illustrated embodiment is a cooling coil through which a refrigerant flows, the cooler 7 of the present invention is not limited to a cooling coil.

In the mixing chamber 10, air from the cooler 7 is mixed with outside air, and the mixed air is sent into the room as shown by arrow F by the blower 9.

In the illustrated example of the outside air conditioner 1, a thermometer 11, a hygrometer 11a, and an air volume meter 13 are attached to the air flow path on the outlet side of the air blower 4519, and both instruments 11, lla, 13 are installed.
The output of is connected to the control device 15. A control signal from the control device 15 is applied to the refrigerant control valve 18 on the refrigerant supply pipe 17a of the cooler 7. The refrigerant from the cooler 7 is discharged via the refrigerant discharge pipe 17b.

When the outside air conditioner 1 is provided with the heater 18, the control device 15 can include a heater control signal generation function. The heater control signal in that case may be applied to the heat medium control valve 21 on the heat medium supply pipe 20a of the heater 19. The heat medium from the heater 19 is discharged via the heat medium discharge pipe 20b. Furthermore, a humidifier 23 may be included in the outside air conditioner 1 if necessary. In this case, the hygrometer 11a is connected to the control device 15, and the control device 15 includes a humidity control function.
The humidifier 23 may be controlled by the control device 15.

The operation of the illustrated example of the control device 15 will be explained with reference to FIG.

When the control is started, the control device 15 receives information on the temperature T and humidity RH of the air blown, and information on the amount of air blown from the thermometer 11, the hygrometer 11a, and the air volume meter 13 in step (3). Here, the above-mentioned air temperature T, humidity RH, and air flow rate are the temperature and flow rate of air blown out from the outside air conditioner 1. Next, in step ①, the temperature T of the blown air,
The opening degree V of the refrigerant control valve 18, the heat medium control valve 21, and/or the humidifier 23 is calculated based on the humidity RH and the amount of air blown.

FIG. 5 shows an example of proportional control during cooling operation by the cooler 7. In this case, a proportional relationship is maintained between the blast temperature T and the opening degree V of the refrigerant control valve 1B for the cooler 7. , T
The above valve opening degree V when =26°C is 50%. Control of the outside air conditioner 1 of the present invention is not limited to the proportional control described above, and for example, the temperature T of the blown air is
, high-level control such as <PID control based on temperature/humidity H and air flow rate is also possible.

In step (2), a control signal corresponding to the valve opening degree V calculated as described above is sent to the refrigerant control valve 18, the heat medium control valve 21 and/or the humidifier 23, and Operate the valve 21 and/or the humidifier 23. It is determined in step (2) whether or not the air conditioning is being controlled, and if it is being controlled, the process returns to step (2) to continue the above control, and if it is not being controlled, the control is ended.

As explained in detail above, the humidity-controlled outdoor air conditioner according to the present invention includes a cooler that cools and dehumidifies outside air, and a mixing chamber that mixes the outside air with the air from the cooler. By using , the following remarkable effects can be achieved.

(b) The dehumidification effect can be improved with a simple structure.

(b) Compared to conventional technology that controls humidity by reheating, there is an energy saving effect because reheating energy is not required.

(c) It is possible to eliminate the need for excessively low-temperature air blowing for dehumidification, and prevent discomfort caused by excessively low-temperature air.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of one embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of the dehumidifying effect, FIG. 4 is a flowchart of control, and FIG. 5 is an explanatory diagram of proportional control. 1...Outside air conditioner, 3...Intake chamber, 4.
... part of the filter, 5 ... outside air adjustment damper,
6... Cooling adjustment damper, 7... Cooler,
8... Partition plate, 9... Air blower, 10... Mixing chamber, 11... Thermometer, 13... Air flow meter, 15
...control device, 18...refrigerant control valve, 19...
- Heater, 21... Heat medium control valve, 23... Humidifier.

Claims (1)

[Claims] A humidity-adjustable outside air conditioner comprising a cooler that cools and dehumidifies outside air, and a mixing chamber that mixes the outside air with the air from the cooler.