JP4823019B2 - How to prevent frost from forming on humidified pan - Google Patents

Description

  The present invention relates to a method for preventing frosting on a humidifying pan that humidifies air below freezing point. More specifically, the present invention relates to a humidifying pan suitable for humidifying means for supplying low-temperature humidified air that is above ice saturation to a snow making part of an artificial snow making device. The present invention relates to a method for preventing frost formation.

  For water that requires low-temperature humidified air, such as a snow-making part of an artificial snow-making device, low-temperature water with a water temperature set to 40 ° C. or lower in the humidifying pan provided in the supply path to the air below the freezing point supplied to the snow-making part Is configured to supply moisture to the snow-making part as low-temperature moist air above ice saturation (see, for example, Patent Document 1).

  However, if the air below freezing point that passes around the humidifying pan contains moisture evaporated from the water in the humidifying pan and gets wet above ice saturation, frost forms on the edge located downstream of the air flow in the humidifying pan. Gradually grows and eventually comes into contact with the water in the humidifying pan, sucks up the humidifying water in the humidifying pan, leaks out of the humidifying pan, and the leaked water touches the air below freezing and freezes. There is a possibility that the device cannot be stably operated due to obstruction of ventilation.

  In addition, there are cases where humidifying pans are arranged in multiple stages in order to promote contact between the humidifying water and air. In this case, air that has been humidified above ice saturation including water evaporated from the water in the lower humidifying pan. However, there is also a possibility that the drainage pipe contacts with the drainage pipe in the upper humidification pan, and the frost formed on the drainage pipe gradually grows and comes into contact with the humidification water in the humidification pan.

  And in order to ensure the stable operation of the apparatus, the operation of the apparatus must be interrupted when removing the ice block that leaks out of the humidifying pan and freezes.

Japanese Patent No. 3397582 (pages 1-5, FIGS. 1-5)

  It is an object of the present invention to prevent frosting on a humidifying pan and to supply low-temperature humidified air continuously and stably to a device that requires low-temperature humidified air such as an artificial snow making device. .

  In order to solve the above-described problem, the method for preventing frosting of a humidifying pan according to the present invention is provided with the heat of the humidifying water in the humidifying pan at a required portion of the humidifying pan humidifying the air below freezing point flowing through the air passage. It is the structure which conducts.

  And the said required part is set as the base part of the drainage pipe connected to the edge part of the downstream of the air in the air path of a humidification pan, or a humidification pan bottom part.

  In addition, the outer surface of the humidifying pan is covered with a heat insulating material, but the required portion is a non-covering portion where no heat insulating material is provided, or a heat transfer material is provided to cover the required portion. The portion is provided so as to be in contact with the humidifying water in the humidifying pan.

  Furthermore, a heater is provided in the humidifying pan, and heating is performed only during the period when the temperature of the water for humidification falls below a predetermined temperature.

  According to the method of the present invention, the heat of the humidifying water is transmitted to the required parts such as the edge of the humidifying pan and the base of the drain pipe, which easily frost, and the frost is prevented by this heat.

  Therefore, the conventional problems of adhering frost sucking up the humidifying water and generating ice blocks or leaking water can be solved, stable operation of the device can be achieved, and operation of the device such as removal of ice blocks can be achieved. Therefore, it is possible to eliminate the necessity of interrupting the operation and to improve the reliability of the apparatus.

  In addition, although the heater is provided with a heater, the anti-frosting action can be achieved more reliably. However, since the heater is operated only when the temperature of the humidifying water is low, the temperature of the low-temperature humidified air can be increased unnecessarily. Thermal energy can be reduced as much as possible.

Hereinafter, embodiments of the method of the present invention will be described in detail based on specific examples of a humidifying pan shown in the accompanying drawings.
The humidifying pan 1 shown in FIG. 1 is provided with a heat insulating material 5 on almost the entire outer surface of the humidifying pan main body 2, but an uncovered portion that does not cover the heat insulating material 5 is provided on the outer surface near the opening edge 2a. Therefore, the heat of the internal humidifying water 7 is kept at a temperature at which the heat is transmitted to the non-covering portion of the heat insulating material in the humidifying pan body 2 to prevent freezing, thereby preventing the generation and growth of frost.

  Further, the humidifying pan 1 shown in FIG. 2 has an outer surface in the vicinity of the edge 2a that is a portion through which air humidified to a level higher than ice saturation including moisture evaporated from the humidifying water 7 in the humidifying pan 1 shown in FIG. It is a required part for preventing frost formation, and this required part is an uncovered part that does not cover the heat insulating material 5.

  And the non-covering part of the heat insulating material mentioned above is comprised from the edge part 2a to the position lower than the water surface of humidification water.

  In addition, the humidifying pan 1 shown in FIGS. 3 and 4 is provided with the heat transfer material 6 on the edge 2a on the downstream side of the air instead of providing the non-covering portion of the heat insulating material as described above.

  The heat transfer material 6 has a part, specifically, a lower end side of the inside of the humidifying pan body 2 facing the inside of the humidifying water 7, and extends from the edge 2 a to the outside of the heat insulating material 5. It is constructed so as to wrap the edge widely, and the temperature of the humidifying water 7 is maintained at a temperature at which the heat transfer material 6 is conducted and frost is not formed around the edge 2a.

  The humidifying pan 1 shown in the present embodiment is configured to circulate for the purpose of keeping the temperature of the humidifying water 7 constant, and includes a drain pipe 4a that overflows and discharges the humidifying water from the humidifying pan. Also in this drain pipe, as shown in FIGS. 1 and 2, an uncovered portion that does not cover the heat insulating material 5a is provided in the vicinity of the humidifying pan 1 of the drain pipe 4a, or is not covered as shown in FIGS. The periphery of the drainage pipe 4a at the wearing part is covered with the heat transfer material 6a, and the heat of the humidifying water 7 flowing down in the drainage pipe 4a is transmitted through the heat transfer material 6a and kept at a temperature at which frost formation is not possible. It is configured to lean.

  Therefore, as shown in FIG. 5, when the humidifying pan 1 is used in a humidifying chamber 8 that is an air passage for non-processed air arranged in multiple stages, the air humidified above the ice saturation in the lower humidifying pan 1 is Even if it passes around the drain pipe 4a that is covered with the heat transfer material 6a, the drain pipe 4a is kept at a temperature that does not form frost by the humidifying water, so that the drain pipe 4a (the outer surface of the heat transfer material 6a) Frost adhesion is prevented.

  FIG. 6 shows an example in which the humidifying pan 1 is provided with heaters 9 and 9. This heater is configured to be ON / OFF controlled according to the water temperature of the humidifying water 7, and the temperature of the humidifying water is shown. Is turned on when the temperature becomes lower than a preset temperature, and turned off when the temperature of the humidifying water rises above the set temperature due to heating by the heater or due to an external factor.

  Heating by this heater is not intended to heat the humidifying water, but to supplement this heat when the temperature of the humidifying water is low and the heat for preventing frosting obtained from the humidifying water is insufficient. It is.

  The heaters 9 and 9 may be electric heaters, or may use a heat medium such as a high-temperature refrigerant or brine from other refrigerators.

  Reference numeral 3 in each figure in the above-described embodiments is a water supply port of the humidifying water 7 circulated and supplied into the humidifying pan 1, and reference numeral 3 a indicates a water supply pipe of the humidifying water 7.

 Further, since the material of the humidifying pan main body 2 is always in contact with the humidifying water, it is preferable to use a stainless material excellent in rust prevention, and the heat transfer material 6 is preferably a copper material excellent in heat conduction.

The perspective view which shows an example of the humidification pan which concerns on this invention. The perspective view which shows an example of the humidification pan which concerns on this invention. The perspective view which shows an example of the humidification pan which concerns on this invention. FIG. 4 is a cross-sectional view taken along the line II in FIG. 3. The side view which shows arrangement | positioning of the humidification bread | pan in a humidification chamber. Sectional drawing which shows an example of the humidification pan provided with the heater.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Humidification pan 2 Humidification pan main body 2a Edge 3 Water supply port 3a Water supply pipe 4 Drainage port 4a Drainage pipe 5 Thermal insulation material 5a Thermal insulation material 6 Heat transfer material 6a Heat transfer material 7 Humidification water 8 Humidification chamber 9 Heater

Claims (3)

In the method of preventing frosting of a humidifying pan that conducts heat from the humidifying water in the humidifying pan that humidifies the sub-freezing air flowing through the air passage, the outer surface of the humidifying pan is covered with a heat insulating material. And the heat-transfer material which covers the said required part is provided, A part of the heat-transfer material is provided so that it may contact with the humidification water in the humidification pan, The frosting prevention method of the humidification pan characterized by the above-mentioned.   The humidification pan frosting prevention method according to claim 1, wherein the required portion is an edge portion on the downstream side of the air in the air passage of the humidification pan. The humidification pan frosting prevention method according to claim 1, wherein the required portion is used as a base of a drain pipe connected to a humidified pan bottom of a humidified pan arranged in multiple stages.

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