JPS6219879Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a cooling-only air conditioner, more specifically, a cooling-only air conditioner that maintains a predetermined low temperature without dehumidifying an air-conditioned area that houses heat-generating machines such as telephone exchanges that do not require dehumidification. Regarding air conditioners that can be used.

In general, in an air conditioner, in order to cool the air-conditioned area without dehumidifying it, the heat exchange area of the evaporator must be made sufficiently large, the air volume to the evaporator must be increased, and the evaporation temperature in the evaporator must be raised. The temperature difference between the inflow air temperature and the outflow air temperature to the evaporator is made small.

As a result, conventional evaporators have become larger and the capacity of evaporator fans has become larger, resulting in larger external dimensions and higher costs, as well as increased noise due to increased air volume. Moreover, in order to raise the evaporation temperature, the temperature of the suction gas and the temperature of the discharged gas are too high, resulting in a problem of shortening the life of the compressor.

The air conditioner of this invention was devised in view of the above problems, and its purpose is to improve air conditioning without particularly increasing the heat exchange area of the evaporator, the air volume to the evaporator, or the capacity of the compressor. To provide an extremely economical air conditioner that can reliably maintain a target area at a predetermined low temperature without dehumidifying it, does not require drain piping, is compact overall, and has low initial and running costs. At the point.

That is, the present invention provides a cooling-only air conditioner in which a main body casing is provided with an inlet and an outlet, and an evaporator equipped with a drain pan is disposed in the air passage from the inlet to the outlet. An ultrasonic humidifier is provided on the windward side or in a parallel position with respect to the evaporator and below the drain pan, and the drain of the drain pan is electrically connected to the ultrasonic humidifier, so that the drain of the drain pan is passed through the drain pan. A detector detects the amount of dehumidification in the evaporator by detecting changes in the water level of drain water flowing into a saucer of the ultrasonic humidifier, and a humidification amount corresponding to the amount of dehumidification is determined based on an output signal from the detector. By installing a control unit that controls the ultrasonic humidifier so that the humidity is generated, the absolute humidity is made the same during suction and when blowing out, all of the above-mentioned conventional problems can be solved at once. This made it possible to maintain the temperature at a predetermined low temperature without dehumidifying it.

Embodiments of the air conditioner of the present invention will be described below based on the drawings.

In the figure, 1 is the casing, the inside of which is partitioned into a heat exchange chamber 3 and a machine room 4 by a partition plate 2, and the front part 1a of the casing 1 in the heat exchange chamber 3
A suction port 5 is provided at the top of the casing 1, an air outlet 6 is provided at the top of the casing 1, and a fan 7 is provided inside the air outlet 6.
is attached to form an air passage 8 between the suction port 5 and the blowout port 6. 9 is machine room 4
This is a compressor installed in

Reference numeral 10 denotes an evaporator installed in the air passage 8, and a drain pan 11 is attached to the lower part of the evaporator 10 to receive drain condensed by the evaporator 10. (not shown) and the evaporator 10 are connected by refrigerant piping (not shown).

Therefore, in the air conditioner configured as described above, the present invention provides an ultrasonic humidifier 12 in the air passage 8 at a position below the drain pan 11, and the humidifier 12 is connected to the drain pan 11. When indoor air flows through the evaporator 10, an amount corresponding to the drain that is dehumidified is surely evaporated from the humidifier 12 to successively supply moisture into the air passage 8.

The ultrasonic humidifier 12 is equipped with a detector (not shown) and a control section (not shown) to control the ultrasonic humidifier according to the amount of dehumidification. Humidification is performed in an appropriate amount of humidification.

That is, the detector detects the drain dish 11.
The amount of dehumidification in the evaporator 10 is detected by detecting the change in the water level of drain water flowing into the tray of the ultrasonic humidifier 12 through the above, and the output signal from the detection is used to humidify the amount corresponding to the amount of dehumidification. The ultrasonic humidifier is controlled to generate a certain amount of moisture.

The ultrasonic humidifier 12 is installed in the air passage 8 in parallel with the evaporator 10 in FIG.
1. When the absolute humidity is H1, the state of air with a suction amount Q1 is changed as shown in FIG. 2.

That is, when the compressor 9 is driven and the fan 7 is operated, a point P of temperature T1 and absolute humidity H1 of the air-conditioned area A flows from the suction port 5 into the casing 1.
The air in the state of 1 is drawn into the suction amount Q1, and a part of the air amount Q2 passes through the evaporator 10 and reaches the point P2.
In other words, the air is cooled to a predetermined temperature T2 and dehumidified to the absolute humidity H2, while the remaining air amount Q
3 passes through the ultrasonic humidifier 12 to re-evaporate the drain water in the humidifier 12 in an amount corresponding to the dehumidification amount, and the state at point P3, that is, the absolute humidity increases to H3, and due to the latent heat during re-evaporation. Cooled to temperature T3
becomes. The air at points P2 and P3 above passes through the evaporator 10 and the ultrasonic humidifier 12 and then merges to maintain the state at point P4, that is, the absolute humidity H4, which is the same value as the value H1 of the intake air. However, only the temperature is cooled down to T4 and the air is blown out from the air outlet 6.

Therefore, when storing mechanical equipment such as a telephone exchange in one room, it is possible to maintain the air at a predetermined low temperature while eliminating the amount of dehumidification from the air in the air-conditioned area. Since the latent heat of vaporization can be utilized during humidification in the container 12, an increase in cooling capacity can be expected.

i.e. (H1−H2)Q2=(H3−H1)Q3 Also, the sensible heat capacity to be processed by the evaporator q1=Cp×(T1−T2)×Q2 Sensible heat capacity in drain water re-evaporation q2=Cp×(T1−T3)×Q3 Sensible heat capacity of air conditioner q=q1+q2=Cp(T1−T4) ×(Q2+Q3)=Cp(T1−T4)×Q1 Here, Cp is the specific heat of air.

As mentioned above, the sensible heat capacity of the air conditioner increases by q2 minutes.

However, in the above explanation, the evaporator 10 and the ultrasonic humidifier 12 are provided in parallel with each other in the air passage 8, but they may be provided in series with each other, and similar effects can be achieved. It is.

That is, in the embodiment shown in FIG. 3, the evaporator 10 is installed across the entire width of the air conditioner, and the ultrasonic humidifier 12 is installed on the windward side of the evaporator 10. In this case, as shown in FIG. The suction air in the state of point P1 with temperature T1 and absolute humidity H1 first conveys the mist generated from the humidifier and reaches the state of point P5, that is, the absolute humidity rises to H5 due to re-evaporation of drain water. It is cooled by the latent heat during re-evaporation and the temperature reaches T.
5, and then the evaporator 10
The air flows to the state at point P6, that is, the humidity is dehumidified by an amount corresponding to the humidification amount, and the absolute humidity H6 decreases to the same value H1 as at the time of suction, and the temperature is cooled to T6, and the air flows out from the air outlet 6. It blows out.

By the way, in the case where there is no re-evaporation of drain water as described above, in FIG. H7
It is dehumidified until

Here, if we specifically compare the case with re-evaporation of drain water in the present invention and the case without re-evaporation, the former has an increased sensible heat capacity of about 3° C. compared to the latter.

In other words, when the humidification efficiency is 50% (50% of the sprayed water evaporates and the remaining 50% remains as water droplets), the above temperature T is approximately T1 = 27°C, T5 = 24°C, T6 = 15
℃, T7=18℃.

Therefore, the sensible heat capacity with re-evaporation is: T1-T6=27℃-15℃=12℃ The sensible heat capacity without re-evaporation is: T1-T7=27℃-18℃=9℃ Therefore, the difference in sensible heat capacity between the two is 3°C, which is equal to the difference between T1 (27°C) and T5 (24°C).

Note that since dirt may get mixed into the drain, it is preferable to install a strainer to remove dirt in the pipe leading from the drain tray 11 to the ultrasonic humidifier 12.

As described above, the present invention is to install an ultrasonic humidifier on the windward side of the air passage or in parallel with the evaporator.
The humidifier is installed at a position below the drain pan, and conducts the drain of the drain pan to the humidifier to detect changes in the level of drain water flowing into the tray of the ultrasonic humidifier through the drain pan and evaporate the humidifier. Absolute humidity is determined by providing a detector that detects the amount of dehumidification in the humidifier and a control unit that controls the ultrasonic humidifier to generate an amount of humidification corresponding to the amount of dehumidification based on the output signal from the detector. Since the cooling is made to a predetermined low temperature without changing between suction and blowout, the heat exchange area of the evaporator becomes large, the capacity of the evaporator fan becomes large, and the capacity of the compressor increases. It is possible to reliably maintain the air-conditioned area at a predetermined low temperature without dehumidifying the air conditioner area without increasing the air flow rate or increasing noise due to an increase in air volume.

That is, when the humidifier is provided on the windward side of the evaporator, the temperature of the air-conditioned area can be maintained at about 3° C. lower than when the drain water is not re-evaporated.

Moreover, since all of the drain is evaporated, there is no need for drain piping.Also, an ultrasonic humidifier can be placed upwind or in parallel with the air passage to the evaporator, so that high-temperature suction can be drawn into the humidifier. Since the humidifier actively uses the heat of the high-temperature intake air as the latent heat of evaporation of drain water, the temperature of the intake air can be lowered, resulting in less evaporation. Compared to draining the drain water in a container or evaporating the drain water using heating means such as a heater, the cooling effect can be improved, and the overall size can be made smaller and the initial cost is reduced. Both running costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional explanatory diagram showing an embodiment of the present invention, Fig. 2 is an psychrometric diagram thereof, Fig. 3 is a cross-sectional explanatory diagram showing another embodiment of the present invention, and Fig. 4 is an psychrometric diagram thereof. be. 1...Body casing, 5...Suction port, 6...
Air outlet, 8...Air passage, 10...Evaporator, 11
...Drain dish, 12...Ultrasonic humidifier.

Claims (1)

[Scope of utility model registration request] The casing 1 is provided with an inlet 5 and an outlet 6, and an air passage 8 leading from the inlet 5 to the outlet 6.
In a cooling-only air conditioner equipped with an evaporator 10 equipped with a drain pan 11, an ultrasonic humidifier 12 is placed upwind of or parallel to the air passage 8 with respect to the evaporator 10, and Said drain plate 1
1, the ultrasonic humidifier 12 and the drain tray 11 are electrically connected to each other, and changes in the level of drain water flowing through the drain tray 11 into the receiving tray of the ultrasonic humidifier 12 are controlled. A detector for detecting the amount of dehumidification in the evaporator 10 and a control section for controlling the ultrasonic humidifier 12 to generate an amount of humidification commensurate with the amount of dehumidification based on the output signal from the detector. An air conditioner characterized by: