US1937611A - Means for generating air currents and controlling temperature of same - Google Patents

Description

G. VAN DAAM Dec. 5, 1933.

MEANS FOR GENERATING AIR CURRENTS AND CONTROLLING TEMPERATURE OF SAME Filed Dec. 22. 1931 Mentor. Gerri? lrefiarn Patented Dec. 5, 1933 1 UNITED STATES MEANS FOR GENERATING AIR CURRENTS AND CONTROLLING TEMPERATURE OF SAME Gerrit Van Daam, Buflalo, N. Y.

Application December 22, 1931 Serial No. 582,534

3 Claims. (01. 219--39) The invention relates to improved means for creating a current of air at surrounding temperature and also arbitrarily controlled means for imparting thereto a temperature either above or below that of the surrounding atmosphere.

Referring to the drawing, which illustrates merely by way of example suitable means for effecting my invention:---

Fig. 1 is a side elevation.

Fig. 2 is a front elevation.

Fig. 3 is a front elevation on the plane of line 3 of Fig. 1.-

Fig. 4 is a detail in elevation on enlarged scale of the hand operated switch arrangement.

Fig. 5 is a diagram of the electric connections throughout the several views.

In Fig. 1 is shown the electric motor 10, on the shaft of which motor is mounted the fan 11, enclosed within the usual cage 12, in front of which is movably connected the frame or ring 13 carrying the electric resistance '14. The movable connection is shown by way of example, as the hinge 15. The frame or ring 13 may obviously be in sections, each movably connected to the cage 12, as by a hinge 15. Awire guard 16 is also provided, secured to the ring 13 in front of the resistance 14. At the opposite side of ring 13 from the hinge 15 is a spring contact element 17 in electrical connection with the resistance 14. This spring contact 17 is adapted to engage the cooperating contact 18 mounted on the cage 12. This contact 18 is adapted to be connected with the line. These cooperating spring contacts 17 and 18 serve the double purpose of an electric switch for the circuit of the heating element, and a latch or detent for normally holding the heating element in operative position.

Mounted at a convenient point-on the cage 12 is shown a plate 19 carrying contacts 20 and 21 adapted to be connected respectively with the heating resistance and with means associated with a source of cooling medium; A hand operated switch 22 is mounted on this plate 19 and is con-' nected with the line and adapted to contact either with contact 20 or 21 or to assume a neutral position out of engagement with either said contact.

A motor 23 adapted to operate in connection with the usual refrigerating means, is connected on one side of the line and adapted to be connected on the other side of the line through the switch 22.

The refrigerating mechanism may be of any suitable type, enclosed for example in the casing 24 which forms a support for the motor supporting frame 25.

A connecting channel 26 is provided in communication with the cooling chamber within the casing 24 and delivering to an annular channel 2'7 provided in the annular formation 28, which surrounds the housing of motor 10. This formation 28 is provided with a number of openings 29 directed toward the fan 11.

The circuit of the motor 10 is controlled by the switch 30.

In operation:-

When switch 30 is closed the fan 11 is operated, and unless the heating means or cooling means are brought into circuit at the same time, the surrounding atmosphere only is effected. That is the fan 11 is actuated to generate a current of air at the temperature of the surrounding atmosphere. To bring the heating element into action, the frame 13, supporting the resistance 14, must be brought into the closed position shown in Fig. 1, with the elements 17 and 18 in contact and also the switch 22 must engage the contact element 20. When these conditions prevail the major portion of the air current produced by fan 11 is heated by passing through the heating resistance 14.

When the elements 17 and 18 are separated the heating resistance becomes inoperative, and also when the switch 22 fails to engage contact 20, the heating element is out of commission. That is to say, both the contacts 17 and 18 and the contacts 20-and 22 must be in cooperation before the heating element can be effective.

When switch 22 is brought into engagement with contact 21, means become efiective for delivering a cooling medium to the air current produced by the fan 11.

In the example shown the motor 23 of a suitable refrigerating plant is brought into circuit,

95 and means connecting the cooling chamber with the chambered formation 28 enables the fan 11 to draw the cooled air from said formation through the ports 19.

It will of course be understood that other means controlled for example, by switch 22 or other suitable means, may be equally eflective for delivering a cooling medium to the current of air generated by fan 11.

What I claim is:-

1. The combination of an electric motor and fan adapted to be driven thereby, a cage for enclosing the fan, an electric heating element and a supporting frame therefor, said frame having a movable connection with the cage, and a device, and an electric circuit control including fixed and movable contact elements operating to close the circuit either of the heating element, or of the refrigerating device as may be desired.

; cults open.

3. The combination of a casing and a support, an electric motor and fan and a heating resistance associated with the support, an electric refrigerating device within the casing, and a common control for the heating element and the refrigerating device, comprising fixed contacts in the electric circuit and a cooperating movable contact element adapted to assume any one of three positions to closefthe circuit of the heating element, to close the circuit of the refrigerating device or to assume the position with both cir- GERRIT VAN DAAM.

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