JP2610673B2 - How to treat condensed water in air conditioners - Google Patents

Description

The present invention relates to a treatment of condensed water of an air conditioner in an individual air conditioning system using a water-cooled air conditioner such as an office building or a hotel or a fan coil unit type air conditioner. About the method.

[Conventional technology]

Generally, in an office building or a hotel, an individual air-conditioning system using a water-cooled air conditioner or a fan coil unit type air conditioner is suitable. At that time, a method of treating condensed water generated in the air conditioner is preferable. There is a method in which a drain pan connected to a drain drain pipe is provided below a cooling coil in an air conditioner, condensed water generated in the cooling coil is received by the drain pan, and discharged by gravity through the drain drain pipe. Was.

However, in the apparatus according to this method, since the piping system is composed of three systems of cold water (cooling water) going and returning pipes and a drain drain pipe, these pipes require many members and man-hours, In particular, for air conditioners installed in the ceiling, there are various restrictions such as the slope of the drain drain pipe, the arrangement of piping space with other electrical pipes, and the height limitation of the ceiling space. However, there was an inconvenience that the piping was extremely difficult.

Under such circumstances, as a method of treating condensed water, which can alleviate the installation restriction on the drain pipe due to natural discharge due to gravity, for example, Japanese Patent Application Laid-Open No. 61-268928 has proposed. That is, in the publication,
The drain pan and the vacuum pump are connected via a drain pipe and a drain chamber, and a solenoid valve that can be opened and closed by a control device is interposed in the drain pipe. When condensed water accumulates in the drain pan, the control device turns off the solenoid valve. , And at the same time, the vacuum pump is operated to discharge the condensed water in the drain pan.

In this method, since the condensed water is forcibly discharged by the vacuum pump, it is not necessary to pay special attention to the gradient of the drain pipe, so that the arrangement of the pipe space with other pipes and the accommodation in the ceiling are facilitated. However, drain pipes still need to be installed throughout the building,
Many piping members and labor are required, and there is no great difference from the above-mentioned ones due to the relationship with the construction process of the building.

Therefore, as a method of simplifying the piping structure without providing a drain piping, there is a method disclosed in Japanese Utility Model Laid-Open No. 62-124418. In this conventional example, condensed water generated in an evaporator, which is a cooling coil, is received by a drain pan, stored in a storage tank via a connection pipe, and sprayed with condensed water from an upper part of the condenser via a sprayer by a pump. While evaporating with the heat of the condenser, the outside air is introduced by a fan through the outside air inlet, and the heat of the condenser and the evaporated water vapor are discharged outside from the outlet.

[Problems to be solved by the invention]

However, the method described in Japanese Utility Model Application Laid-open No. Sho 62-124418 can be applied only to air-cooled air conditioners, and cannot be mounted on water-cooled air conditioners and fan coil unit type air conditioners. was there. Further, in the method described in the publication, there is a case where all the condensed water cannot always be subjected to the evaporating treatment. In order to prepare for this, an overflow drain pipe is connected to the storage tank, so that the overflowed condensed water is discharged to the outside. Therefore, since the piping system is not always simplified, the above-mentioned problem of requiring many members and man-hours for the piping is hardly improved, and as a result, the piping structure around the air conditioner is enlarged. In addition, there is a problem that the installation cost is increased as well as a problem that the settlement is poor.

Therefore, the present invention has been made by paying attention to various problems of the related art, and is a method applicable to a water-cooled air conditioner and a fan coil unit type air conditioner. It is an object of the present invention to solve the problem that it is possible to prevent the swelling of the swelling and improve the convergence and to reduce the construction cost.

[Means for solving the problem]

The present invention is a method for treating condensed water of an air conditioner in an individual air conditioner using a water-cooled air conditioner or a fan coil unit air conditioner, wherein condensed water generated in the air conditioner is stored in a storage tank. When the water level detector detects that the inside of the storage tank has reached a predetermined water level, the pump conveys the condensed water in the storage tank to the nearest cooling water pipe and discharges the water. And when it is detected by the electric water level detector that the water level in the storage tank does not drop, it is determined that the pump has failed, and an alarm is issued when this determination is made and the water level reaches a predetermined dangerous water level. This is a method for treating condensed water in an air conditioner that automatically stops the operation of the air conditioner at the same time as the emission.

[Action]

Condensed water generated by a water-cooled air conditioner or a fan coil unit type air conditioner is stored in a storage tank. The accumulated condensed water is pumped by a pump and discharged through a nearest cooling water pipe or a cold water pipe. When the water level detector detects that the pump is in a driving state and the water level in the storage tank does not decrease, the pump is determined to be faulty, and if the determination is made and the water level reaches the dangerous water level, an alarm is issued. It is emitted and the operation of the air conditioner is automatically stopped.

〔Example〕

(First Embodiment) Next, a first embodiment of the present invention will be described with reference to FIG. 1 and FIG. The first embodiment shows a case of a horizontal fan coil unit type air conditioner installed in a ceiling or the like.

In these figures, 1 is a fan coil unit type air conditioner, 2A is a cold water supply pipe to the air conditioner 1, 2B is a cold water return pipe from the air conditioner 1, and 3 is a condensed water treatment device of the air conditioner 1. Show.

The condensed water treatment device 3 includes a storage tank 4 for storing condensed water, a water level detector 5 and a pump 6 installed in the tank 4, and pipes around the tank 4 (a connection pipe 7, a water pipe 8, Drain pipe 9), valves 10 and 11 for opening and closing water channels, and air conditioner 1
And a control device 12 for controlling the driving of the pump 6.

The storage tank 4 is attached to the side surface of the air conditioner 1 as shown in the figure, and communicates with the drain pan 1a of the air conditioner 1 through a short connection pipe 7. A pump 6 is attached to the upper part of the storage tank 4 so that a suction side communicates with the inside of the tank, and a discharge side of the pump 6 returns cold water through a water supply pipe 8 in which a valve 10 is inserted. It is connected to the nearest position of the tube 2B. A water level detector 5 is provided in the storage tank 4, and the detector 5 outputs a water level signal corresponding to the water level in the tank 4 to the control device 12.

Further, the drain pipe 9 is simply a short pipe, one end of which is connected to a lower position on the side surface of the storage tank 4, and the valve 11 is inserted in the middle thereof.

The control device 12 reads the water level signal to determine the water level,
It has a known configuration for performing on / off control of the pump drive having hysteresis characteristics according to the water level condition.
That is, when the water level has reached the predetermined high water level, the on / off control sends a drive signal to the pump 6 to start rotation, and continues this rotation state until the water level returns to the predetermined low water level. When the water level falls below the low water level, a rotation stop command is issued, and this rotation stop state is continued until a predetermined high water level is reached.

In addition to the function of adjusting the cooling state of the air conditioner 1, the control device 12 has a function of determining a failure of the pump 6 based on a state in which the pump 6 is driven and the water level does not decrease. When the pump-on failure is determined and the water level reaches a predetermined dangerous water level, an alarm is issued from at least one of the central monitoring room and the control panel of the air conditioner 1, and the air conditioner 1 is automatically stopped at the same time. It has become.

In the figure, 1b is a cooling coil of the air conditioner 1, 13 is a blower, 14 is an air inlet, and 15 is an air outlet.

 Next, the operation of the first embodiment will be described.

While the air conditioner 1 operates under the control of the control device 12,
The condensed water generated in the cooling coil 1b is dropped on the drain pan 1a. Then, the condensed water in the drain pan 1a flows into the storage tank 4 through the connection pipe 7 and is stored therein. The water level in the tank 4 is monitored by the water level detector 5 and the control device 12. Therefore, as described above, when the water level in the tank 4 rises and reaches a predetermined high water level, the pump 6 is automatically driven, whereby the condensed water in the tank 4 flows through the water supply pipe 8 and the cold water return pipe 2B. And is drained. Then, when the water level in the storage tank 4 falls to a predetermined low water level, the pump 6 stops, and thereafter, this operation is repeated as necessary to drain the water in the tank 4.

If the pump 6 breaks down for any reason, as a safety measure, an automatic issuance of an alarm and an automatic stop of the operation of the air conditioner 1 are performed as described above. For this reason, the operator can perform appropriate processing based on the alarm. At this time, the condensed water stored in the storage tank 4 can be easily drained from the drain pipe 9 by opening the valve 11 of the drain pipe 9, and may be received by an appropriate container or a rubber hose. Also, cleaning is performed with the valve 11 opened.

As described above, according to the first embodiment, the condensed water treatment device 3
Is compactly located near the air conditioner 1 and the conventional drain drain pipe is not required, so that the piping system is reduced from three conventional systems to two systems. For this reason, the trouble of paying attention to the gradient of the drain pipe is eliminated, and the work of beam, wall, and floor penetration is reduced, so that the pipe work and the dew-proof work are greatly simplified, and the material cost is also reduced. In addition, the space between other buildings, electrical piping systems, and embedded lighting is eased, making adjustments easy and making it possible to easily change the installation position after construction. It can be achieved, and the construction cost is remarkably advantageous.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same reference numerals are used for the same or equivalent components as in the first embodiment, and the description thereof is omitted or simplified (the same applies to a third embodiment described later).

This second embodiment shows a case of a floor-mounted fan coil unit type air conditioner 1 as shown in the figure, in which a storage tank 4 of a condensed water treatment device 3 is housed in a case of the air conditioner 1. . Then, the drain pan 1a and the storage tank 4 are integrally formed, and the condensed water generated in the cooling coil 1b drops onto the drain pan 1a and flows into the storage tank 4 as it is.

Since the other configuration of the condensed water treatment device 3 is the same as that of the above-described first embodiment, the same operation and effect as those described above can be obtained by the second embodiment.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG.

As shown in the drawing, the third embodiment shows a case of a water-cooled air conditioner 1, in which 17 is a condenser, and 18, 19 are condensers 17.
Cooling water supply pipe and cooling water return pipe.
The pump 6 and the return side cooling water pipe 19 are connected by the water supply pipe 8, and the condensed water in the storage tank 4 is cooled by the cooling water pipe 19.
And is joined to the cooling water in the pipe 19 to be drained.
In the figure, 16 is a compressor.

Since the configuration of the other condensed water treatment device 3 is the same as that of the first and second embodiments, the same operation and effect as those described above can be obtained by the third embodiment. On the other hand, in the present embodiment, since the condensed water to be drained is reused, the cooling water is saved, and the secondary effect of lowering the temperature is also obtained.

〔The invention's effect〕

As described above, according to the method of the present invention, the drainage treatment of condensed water can be performed in a space near the air conditioner. The installation of conventional drain drain pipes is no longer necessary, and with this unnecessary installation, piping materials and dew-proofing materials are reduced, and construction is simplified, thus lowering construction costs. , And the construction period is shortened. Further, it is possible to easily cope with a design change, a position change of the air conditioner after the construction, and the like. Further, in the case of a water-cooled air conditioner connected to a cooling water pipe, the temperature of the cooling water is lowered at the same time as the condensed water becomes replenishing water, so that there are beneficial effects such as an improvement in cooling efficiency. Further, according to the present invention, when the water level in the storage tank does not decrease even though the pump is driven, it is determined that the pump has failed, and the determination and the water level in the storage tank have reached the dangerous water level. Sometimes, an alarm is issued and the air conditioner is automatically stopped, so that the condensed water is prevented from overflowing from the storage tank, and there is an effect that the person concerned can be informed of this situation.

[Brief description of the drawings]

FIG. 1 is a view showing a horizontal fan coil unit type air conditioner according to a first embodiment of the present invention.
FIG. 2 is a schematic sectional view taken along the line A, FIG. 2 is a schematic side view showing a horizontal fan coil unit type air conditioner according to the first embodiment,
FIG. 3 is a front sectional view schematically showing a floor-mounted fan coil unit type air conditioner according to a second embodiment of the present invention.
The figure is a perspective view of the storage tank and its surroundings in FIG.
FIG. 5 is a front sectional view schematically showing a water-cooled air conditioner according to a third embodiment of the present invention. In the figure, 1 is an air conditioner, 2B is a cold water return pipe, 3 is a condensed water treatment device, 4 is a storage tank, 6 is a pump, and 19 is a cooling water return pipe.

Claims (1)

(57) [Claims] 1. A method for treating condensed water of an air conditioner in an individual air conditioner using a water-cooled air conditioner or a fan coil unit type air conditioner, wherein condensed water generated in the air conditioner is stored in a storage tank. When the water level detector detects that the inside of the storage tank has reached a predetermined water level, the pump conveys the condensed water in the storage tank to the nearest cooling water pipe and discharges the water. And when the water level detector detects that the water level in the storage tank does not drop, it is determined that the pump has failed, and an alarm is issued when the determination is made and the water level reaches a predetermined dangerous water level. A method for treating condensed water in an air conditioner, wherein the operation of the air conditioner is automatically stopped at the same time as the emission.