JP2582737B2 - How to prevent clogging of water humidification nozzle for air conditioning - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a humidifying device for air conditioning, and more particularly to a water humidifying nozzle for air conditioning for preventing clogging of a nozzle in a water humidifying device using a nozzle for spraying water. And a method for preventing clogging.

(Prior art) Generally, humidifiers include (1) a method using boiler steam, (2) a water spray method, and (3) an electrothermal heating method. However, a method using (1) boiler steam requires a large investment in equipment. Therefore, only large systems can be adopted, and soaring oil prices have brought operating costs close to the limit of use. In addition, additional facilities are required from the point of pollution prevention,
In addition, it was necessary to pay attention to maintenance such as corrosion of piping and scale of the boiler, as well as costs.

(2) The water spray method is the most widely used because the equipment cost is low, but the spray particles are coarse because of the one-fluid nozzle, and the effective humidification rate does not exceed 20 to 25%. And a large amount of water wasted and discharged.

The electrothermal evaporation method (3), as typified by a so-called van-type humidifier, has a high operating cost, and salt in the water precipitates out and accumulates on equipment, and is disposed of within a few years. In many cases, humidification was not immediately effective.

Therefore, a water humidifier using a two-fluid nozzle has been proposed. As shown in FIGS. 3 to 5, this two-fluid nozzle sprays water from one nozzle and compressed air from the other nozzle, and collides in the air to generate dry fog. The humidification efficiency described above is obtained, and it has advantages such as water saving of tap water and downsizing of the blower without the need for a demister. Therefore, it is used in various fields as efficient humidification means.

(Problems to be Solved by the Invention) Conventionally, the humidification control of the two-fluid nozzle has been performed as follows.

The number of operating nozzles is controlled in accordance with a deviation between a target value and a humidity detection sensor provided on the outlet side of the air conditioner.
A plurality is formed as one group, and the humidity is adjusted by adjusting the number of the two-fluid nozzles for each unit of the group. When stopping the nozzle in response to a change in humidity, water and pressurized air supplied to the two-fluid nozzle were simultaneously stopped.

In general, the operation order of the nozzles is sequentially increased according to the humidification signal according to a predetermined order, so that the water spray nozzle that is frequently used stops stagnation of water in the nozzle flow path even if the nozzle spray is stopped. The water is always replaced because the water is short, but for those that have stopped nozzle spraying for a long time, the stagnation of the water is long, so that the remaining moisture dries out and substances such as magnesium and calcium contained therein precipitate out. There is a problem that the ink adheres to the tip of the nozzle or the flow path and clogs the nozzle.

In particular, since the two-fluid nozzle generates dry fog and increases the humidification efficiency, the hole diameter of the nozzle can be made small. When hard components contained in water adhere to the nozzle tip and the flow path, ultra fine particles are sprayed. Water humidification efficiency. In addition, when a large amount is attached, the nozzle may be closed, and the dry fog may not actually spray from the nozzle even though the humidification increase request signal is output.

Also, in this case, even if the coagulation component of water supplied to the nozzle is removed in advance by a filter or the like, it cannot be completely removed, so that the usable period of the nozzle is slightly extended, and this problem is fundamentally solved. Did not.

The present invention has been made in view of the above-described problems of the related art, and prevents water remaining in a nozzle for a long time by using the frequency of use of all the water humidifying nozzles on average. It is another object of the present invention to provide a method for preventing clogging of a water humidifying nozzle for air conditioning, in which water stays in a nozzle for a long time, and a hard component contained therein does not dry and adhere to block the nozzle.

(Means for Solving the Problems) An object of the present invention is to provide a humidifying device for an air conditioner in which a plurality of water humidifying nozzles are arranged in an air conditioner and the humidifying amount is adjusted by controlling the number of operating water humidifying nozzles. This is achieved by a method for preventing clogging of a water humidification nozzle for air conditioning, which is operated so that the frequency of use of all the water humidification nozzles is averaged.

As a specific method, one is achieved by allocating a corresponding number of water humidifying nozzles to be operated in response to the humidifying signal at random.

Another method is to operate the water humidification nozzles in accordance with the humidification signal in an operation sequence in a predetermined order, and when the humidification amount decreases, the water humidification nozzles are activated first among the activated water humidification nozzles. Stop the operation of the water humidification nozzles that have been used, and operate the water humidification nozzles by the number corresponding to the humidification signal, and when the humidification amount increases, add the corresponding number of subsequent new humidification nozzles and operate them. Can also be achieved by

(Operation) In the present invention, when the required number of water humidification nozzles are activated in response to the humidification signal, the operation order is randomly assigned without predetermined operation, so that all the water humidification nozzles are used on average. Is done. Therefore, since the water in the nozzle is constantly replaced, the water stays in the nozzle for a long period of time and dries, and magnesium and the like contained in the water precipitate and solidify, adhere to the nozzle hole and the like, and close the nozzle. Is prevented.

Also, in the method of operating the nozzles in a predetermined order, when the humidification amount is reduced, the water humidification nozzles that have been activated up to that point are stopped from the nozzle that was activated first, By operating the nozzles by the number corresponding to the humidification signal, the operating nozzles are sequentially shifted.

As a result, the usage frequency of all the water humidification nozzles is averaged, so that it is possible to prevent the nozzles from being blocked due to the accumulation of water in the nozzles.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 4 shows a piping and wiring diagram of a water humidifier (37) using a two-fluid nozzle (10). In the embodiment, five nozzles (10) are grouped into one group (two fluids). As a type nozzle group (4)), a water spray solenoid valve (3) and a compression electricity solenoid valve (2) are provided for each group unit, and the compressed air (6) and the water (5) whose pressures are adjusted respectively. Is supplied.

(8) indicates a pressure gauge for indicating the supply water pressure, and (7) indicates a pressure gauge for indicating the supply air pressure, and the pressure is adjusted so that a dry fog (having a particle diameter of 100 μ or less) with good humidification efficiency is obtained.

Each of the solenoid valves (2) and (3) is connected to the output side of the computer (1) and operates according to a deviation between an input signal of the air supply humidity sensor (50) and a preset target value. 2) Change the number of operations in (3) and control so that the required humidity is obtained.

FIG. 1 shows a first embodiment of a method of operating the water humidification nozzles of the corresponding humidity number while operating all the water humidification nozzles according to the deviation of the humidity.

In the first embodiment, the number of water humidification nozzles to be operated corresponding to the humidification signal is randomly assigned to a corresponding number, and as a result, the frequency of use of each nozzle can be averaged.

FIG. 1 shows the situation, in which the horizontal axis represents time, and the vertical axis represents the required humidification amount (deviation). When operating the number of nozzles corresponding to this humidification amount, a known random number is used. Nozzles are assigned based on the output signal of the generator, and if the deviation humidity changes, that is, if the number of nozzles to be operated changes, the nozzles are newly assigned and operated.

As a result, the nozzles can be used evenly, so that the water in the nozzles is constantly replaced, and the specific nozzles are not used for a long time as in the related art, thereby preventing the nozzles from being blocked.

FIG. 2 shows a second embodiment.
The operation order of the water humidification nozzles operated in response to the humidification signal is operated in a predetermined order, but when the humidification amount decreases, the water humidification nozzle which has been activated first among the water humidification nozzles which have been activated up to that time is used. By stopping the operation from the nozzles, the water humidification nozzles are operated by the number corresponding to the humidification signal, and when the humidification amount is increased, the subsequent corresponding number of new humidification nozzles are added and operated, whereby the water humidification is performed. The nozzles are sequentially rotated, and the frequency of use of each nozzle is averaged.

This prevents the nozzles from being blocked as described above, and allows each nozzle to always operate in a normal state.

 The way of viewing the drawing is the same as in the first embodiment.

FIG. 3 shows a third embodiment of the present invention, in which all nozzles are actuated in turn at short intervals at regular intervals to prevent the previously sprayed water from staying in the nozzles for a long time. For example, as shown in the figure, the nozzle of the nozzle block number 1 is first set to the time T '(for example, 1 to 5 seconds).
The nozzle block number 2 is sprayed after T time (for example, 5 to 10 minutes). This is done over all nozzles.

The reason why all the nozzles are not sprayed at the same time is to prevent the humidity from changing in order to prevent clogging of the nozzles, and only one block does not change the humidity for a short time. Because.

Further, the spraying performed at regular intervals is output as it is even if the nozzle to be sprayed is just in operation to prevent nozzle clogging.

That is, the output signal from the computer based on the humidity deviation and the output signal from the computer for preventing clogging are electrically OR-connected.

Next, FIG. 6 shows a spray state diagram of the ultrafine particles of the two-fluid nozzle used in this water humidifier, and its structure is, for example, as shown in FIG. 7 and FIG.
A nozzle housing (10) having a mounting hole (14) formed with an injection hole (19) at the tip, and inserted into the mounting hole (14);
Nozzle tip (23) with liquid supply holes (16) and pores (17)
The mounting hole (14) and the nozzle tip (23)
The inner and outer circumferences are provided with mutually tapered portions (27), and a plug (18) for pressing the nozzle tip (23) is screwed into the outer end of the mounting hole (14) so that the two tapered portions are fitted. At least two or more nozzles (12) having the nozzle tip (23) incorporated on the concentric axis with the mounting hole (14) are arranged at equal intervals from each other, and their opposing nozzles (12 ), (12)
Is set within the range of 70 to 160 °, and the distance H from the tip of each nozzle (12) to the intersection A of the axis of the other nozzle (12) is within the range of 3 to 15 mm. It is configured to be set to.

FIG. 5 is a schematic view of an apparatus using the water humidifier, in which (A) is an air conditioner and (B) is a drawing and twisting process of a synthetic fiber factory which is a controlled room. ing.

The air conditioner (A) and the control target room (B) are connected via an air supply duct (31) and a return air duct (30) to circulate the air supply (SA) and return air (RA). Is formed. In addition, a path for taking in the outside air (OA) and a path for exhausting the same amount of intake air (EA) are provided.

Inside the air conditioner (A), a filter (32), an air washer (33), a cooler (34),
Steam heater (35), steam spray (36), water humidifier (spray nozzle using compressed air) (37), blower (3
8) are sequentially arranged, and the air washer (33) is connected to a pump (40) for controlling the shower amount, while a pump motor (not shown) connected to the pump (40).
Is controlled by a motor variable speed control device (inverter) (41) according to an output signal of the computer (1).

Next, the two-fluid nozzle (10) generates dry fog by using water (5) having an appropriate pressure and compressed air (6). As described above, the solenoid valve (2) is used.
It is connected to the supply side (5) (6) via (3).

Further, the steam spray (36) is connected to a steam supply (43) via a steam control valve (42) and is controlled by a computer.

In the figure, reference numeral (38) denotes a blower, and the air whose temperature and humidity have been adjusted by the action of each device in the air conditioner (A) described above is used as the air supply (SA) as the control target room (B). The air is sent through the air duct (31).

Here, the computer (1) calculates the control output for humidity adjustment by comparing the humidity measured by the humidity sensor (50) with a preset target value. For example, the humidity is 0% or more. Divided into three areas of less than 35%, 35% or more and less than 70%, 70% or more (100% or less), and corresponding to each output area, use air washer, two-fluid nozzle for water humidification, steam humidification means Is switched. When the control output from the computer (1) is less than 35%, that is, when the required humidification amount is small, the humidity control method using the air washer (33) is selected, and the air washer (33) is set to the maximum. If the humidity is insufficient even if used (that is, the control output
If the water humidifier (37) is selected by using a water humidifier (37) that uses a two-fluid nozzle that is a spray nozzle that uses compressed air (if it exceeds 35%), and even if this water humidifier (37) is used to the maximum If the humidity is insufficient (that is, the control output is 70%
If this is the case, choose the humidity control method using steam spray (36).

The present invention is embodied by using the above-described apparatus, and its operation will be described below.

First, when the air in the controlled room (B) passes through the air duct (30) and returns to the air conditioner (A), it is shower-washed by an air washer (33) and humidified and adjusted to the saturation efficiency. .

At this time, the humidity sensor (50) detects the outlet air of the air conditioner (A), that is, the humidity of the air supply (SA), and in response, the computer (1) calculates a deviation from the target humidity, and calculates a deviation from the target humidity. Output a control signal.

The motor variable speed controller (41) controls the number of revolutions of the pump motor in response to the control signal from the computer (1), whereby the shower water amount of the air washer (33) is adjusted. It acts as

Next, when a higher humidification amount is required beyond the humidification range by the air washer (33) (the actual humidity does not reach the target humidity set value), the rotation speed of the pump motor is set to the upper limit. The humidity is controlled by the water humidifier (37), and the humidity is controlled by the number of sprays of the two-fluid nozzle (10). The two-fluid nozzle (10) keeps its feed water pressure (for example, 0.3 kg / cm ² ) and compressed air pressure (4.0 kg / cm ² ) constant so that the sprayed water has a particle size that evaporates easily. The compressed air (6) is separated from oil mist so as not to block the nozzle, and clean air from which fine dust and the like are removed with a filter or the like is used.

As the water (5) to be sprayed, it is preferable to use clean water with few impurities such as soft water or pure water from which hardness components such as calcium and magnesium dissolved in water are removed so as not to block the nozzle.

Here, the adjustment of the spray amount of water by the two-fluid nozzle (10) is possible by changing the feed water pressure and the compressed air pressure supplied to the two-fluid nozzle (10). ) Does not have the optimum particle size for easy evaporation, and the humidification efficiency is reduced.

Therefore, in the nozzle number control, the number of nozzles to be sprayed and the group in charge are determined for several predetermined stages in accordance with a control signal from the computer (1).

The two-fluid nozzle (10) is operated by solenoid valves (2) and (3) that open and close in response to the output signal of the computer (1), so that the number of actuations is adjusted and the humidity is adjusted stepwise with a certain humidification width. I do.

In this way, the increase or decrease of the humidification amount is realized by increasing or decreasing the use amount of the two-fluid nozzle (10), and the two-fluid nozzle (10) is continuously increased and decreased in a group unit consisting of one or more. The humidity is adjusted. And that 2
As described above, when the spraying of the fluid nozzle is stopped, the water in the nozzle is completely removed by turning off the compressed air later.

Furthermore, a high humidification amount is required even beyond the humidification range of the two-fluid nozzle (10) (that is, even if all the two-fluid nozzles (10) are used) (the target humidity set value is If the humidity does not reach), control is transferred to the steam spray (36), and the target humidity is obtained by adjusting the amount of steam sprayed from the steam spray (36) with a steam control valve.

By combining these control methods, even if the air conditioner (A) requires a considerably large humidification capacity,
It is possible to provide an energy-saving humidity adjustment method that does not cause a large fluctuation in the humidity of the control target room (B) and minimizes the operation cost.

The present invention is not limited to the above-described embodiment, but can be implemented with various modifications as follows.

First, in the above-described embodiment, a room requiring relatively high humidity, such as a textile factory, has been described as an example of the controlled room (B). However, the present invention is also applied to an air conditioner for humans such as a building air conditioning system. Applicable.

(Effects of the Invention) As described above in detail, the present invention operates such that the frequency of use of all the water humidification nozzles is averaged when controlling the number of water humidification nozzles to adjust the humidification amount. Therefore, the water in the nozzles is constantly replaced, and it is possible to prevent the specific nozzles from being used for a long time and closing the nozzles as in the related art.

Therefore, all the water humidification nozzles can always be operated in a normal state, and maintenance due to nozzle clogging is not required.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a state diagram of a humidifying amount and an operating nozzle showing a first embodiment of a method for preventing clogging of a humidifying nozzle, and FIG. 2 is a second embodiment of the same. FIG. 3 is a time chart of a nozzle clogging prevention control method according to a third embodiment, and FIG. 4 is a piping diagram of a water humidifier using a two-fluid nozzle. Wiring system diagram, FIG. 5 is a schematic diagram of an embodiment using a water humidifier, FIG. 6 is a spray state diagram of a two-fluid nozzle, FIG. 7 is a diagram of the two-fluid nozzle shown in FIG. Fig. 8 is an external view.
FIG. (1) Computer, (2) Solenoid valve for compressed air, (3) Solenoid valve for water spray, (4) Two-fluid nozzle group, (10) Two-fluid nozzle, (33) ... air washer, (34) ... cooler, (35) ... steam heater, (36) ... steam spray, (37) ... water humidification nozzle, (SA) ... air supply, ( RA) Return air (A) Air conditioner (B) Control target room.

Claims (3)

(57) [Claims] 1. A plurality of water humidification nozzles are arranged in an air conditioner,
An air conditioning humidifier for controlling the number of operating water humidifying nozzles to adjust the humidification amount, wherein the water humidifying nozzle for air conditioning is operated so that the frequency of use of all the water humidifying nozzles is averaged. To prevent clogging. 2. The method for preventing clogging of a water humidifying nozzle for air conditioning according to claim 1, wherein a corresponding number of water humidifying nozzles to be operated in response to the humidifying signal are randomly assigned. 3. A water humidifying nozzle to be operated in response to a humidifying signal is operated in a predetermined order, and when the humidification amount is reduced, the water humidifying nozzle is operated first among the operating water humidifying nozzles. Stop the operation from the water humidification nozzle, operate the water humidification nozzle by the number corresponding to the humidification signal, and when the humidification amount increases, add the corresponding number of subsequent humidification nozzles and activate it. The method for preventing clogging of a water humidification nozzle for air conditioning according to claim (1).