JP2509389Y2 - Humidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a humidifying device capable of holding in low temperature and high humidity air suitable for an air conditioner for an environment testing device such as a house or a self-propelled vehicle.

[Prior Art and Its Deficiencies] In order to obtain low-temperature, high-humidity air in an environmental testing device for houses, automobiles, etc., a humidifying device by a steam humidifying method is used.

However, when humidifying cold air for low temperature environment testing with such a conventional humidifier, the humidifying vapor that could not evaporate becomes fine water droplets and mixes into the air, causing damage to the inner surface of the duct, dampers, vanes, etc. It adheres to objects and objects to be cooled, freezes and becomes frost, and changes the test environment, and the cooler causes clogging due to frost formation, affecting the environmental temperature and the amount of ventilation.

Further, if the amount of humidification steam is reduced to prevent the occurrence of the phenomenon as described above, unevenness occurs in the steam sprayed from the humidification device, and as a result, uneven humidification occurs in the humidified air and high humidity is generated. It cannot be realized.

Furthermore, since the humidifier itself is cooled to low temperature air, residual steam freezes while the humidification is suspended, etc.
In some cases, the spray nozzle may become clogged, making rehumidification difficult.

[Object of the Invention] The present invention can provide a humidifying device that can achieve high humidity humidification even in low temperature air and prevent the device itself from freezing.

[Means] In order to achieve the above object, the humidifier according to the present invention connects the open base ends of a plurality of branch pipes whose outer ends are closed to the side of the header to which steam is supplied, The branch pipe has a structure in which a plurality of small-diameter nozzles are provided on a side portion, an electric heater wound spirally around the outer circumference is provided, and the outer circumferences of the branch pipe and the nozzle are covered with a heat insulating material.

[Operation] The branch pipe is heated by the heating device provided on the outer peripheral surface of the branch pipe, and the heat loss of the humidifying steam is suppressed to prevent condensation. The transfer is limited to an extremely small amount.

[Embodiment] Next, the humidifying device according to the present invention will be described in detail with reference to FIGS.

Reference numeral 1 denotes a humidifying device, which is provided at an appropriate position in the ventilation passage 2a of the ventilation duct 2 having a rectangular cross section, for example.

In this humidifying device 1, vertical ejection pipes 3 each having an upper end opening are arranged, for example, in parallel so as to be orthogonal to four ventilation passages at equal intervals, and to the lower part of a horizontal header 4 made of a wide-diameter pipe whose both ends are closed. Attach the upper end to communicate with the inside,
Is connected to a steam supply pipe 5 having a regulating valve 6 in the middle.

The jet pipe 3 is formed by covering the outer periphery and the lower end of the branch pipe 7 having an upper end opening in which an electric heater 8 is spirally wound on the outer peripheral surface with a heat insulating material 9.

Further, for example, four nozzles 10 made of a small-diameter pipe slightly longer than the thickness of the heat insulating material 9 are attached to the downstream side of the peripheral surface of the branch pipe 7 so as to be parallel to the ventilation passage. And the ventilation passage 2a of the ventilation duct 2 are communicated with each other.

In the humidifier configured as described above, when the steam sent from a steam generation source (not shown) is supplied from the steam supply pipe 5 to the header 4 by opening the adjustment valve 6, the electric heater 8 and the heat insulating material 9 keep the humidifying heat. The steam having a uniform pressure is supplied to the branched pipe 7 in the ejected pipe 3.

When the internal pressure of the branch pipe 7 increases due to the steam that has not been condensed in the heated and heated jet pipe 3, steam is jetted from the nozzle 10.

The steam thus jetted easily mixes into the air flow passing through the ventilation passage 2a and humidifies the air flowing in the ventilation duct 2.

[Effect] As described above, in the humidifier according to the present invention, the branch pipe to which steam is supplied is heated by an electric heater or the like, and the periphery thereof is covered with a heat insulating material. Although the ejection pipe is cooled by, the vapor inside the pipe does not condense, and the thermal kinetic energy of the vapor is ejected from the nozzle in a high pressure state sufficient to overcome the intermolecular attractive force of the vapor. The vapor diffuses rapidly and mixes into the air stream, which can provide good humidification.

Furthermore, since most of the steam that is ejected is mixed in the air flow, it is possible to keep the surplus steam in the form of fine water droplets and to frost the ducts and dampers to a very small amount.

Further, since the steam is kept at a high temperature by heating and keeping the temperature of the branch pipe in the ejection pipe, clogging of the nozzle due to freezing of the steam can be prevented.

Since the periphery of the branch pipe to be heated is covered with a heat insulating material, the low temperature air flowing in the ventilation duct is not heated by the heating source of the branch pipe, and the temperature of the air flow is not changed. Can perform good humidification.

In the above embodiment, the nozzle in the ejection pipe is heated by the electric heater, but high temperature steam having a temperature higher than that of the humidifying steam is flown between the branch pipe and the heat insulating material around the branch pipe to heat the branch pipe. The same effect can be expected by such a method.

Also, if the nozzle diameter is, for example, 5φ (diameter 5 mm) or less, the spray pressure increases and promotes the diffusion of mist. In addition, if 9 or more nozzles are evenly arranged per 1 m ^{2 of} duct cross section, spraying is possible. The unevenness can be reduced, and more effective humidification can be achieved.

[Brief description of drawings]

FIG. 1 is a front view of a humidifying device according to the present invention arranged in a duct, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a partially enlarged sectional view of an ejection pipe. In the figure, 1 ... Humidifier, 2 ... Ventilation duct 2a ... Ventilation path, 3 ... Jet pipe, 4 ... Header, 5 ... Steam supply pipe, 6 ... Regulator valve, 7 ... Branch pipe, 8 ... Electric heat Heater, 9 ... Insulation material 10 ... Nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 50-43554 (JP, A) Actual Development 60-77945 (JP, U) Actual Public 42-17440 (JP, Y2) Actual Public 41- 2955 (JP, Y2)

Claims (1)

(57) [Scope of utility model registration request] 1. An open base end portion of a plurality of branch pipes whose outer ends are closed is connected to a side portion of a header to which steam is supplied, and the branch pipes are provided with a plurality of small diameter nozzles on their side portions. A humidifying device which is provided on the outer periphery of the branch pipe and the nozzle and is covered with a heat insulating material.