Thermostatically controlled portable electric space heater with automatic temperature setback for energy saving

• US 5,278,936 A
• Filed: 12/23/1991
• Issued: 01/11/1994
• Est. Priority Date: 12/23/1991
• Status: Expired due to Fees

• Current Assignee: Steve Shao
• Original Assignee: Steve Shao
• Inventors: Shao, Steve
• Primary Examiner(s): Bartis, Anthony
• Application Number:
  US07/812,158
• Time in Patent Office: 750 Days
• Field of Search: 219/360-369, 219/492, 219/493, 236/46 R, 236/47, 374/173
• US Class Current: 392/365
• CPC Class Codes: F24H 15/254 Room temperature
• CPC Class Codes: F24H 15/37 of electric heaters
• CPC Class Codes: F24H 3/0417 portable or mobile
• CPC Class Codes: F24H 9/2071 using electrical energy supply
• CPC Class Codes: G05D 23/1923 using thermal energy, the cost of which varies in function of time

Abstract

An electrically-powered portable space heater of the type having one or more vertically extending fin-tube heating elements disposed within an elongated housing has a selectively adjustable temperature controller responsive to a signal from an upwardly extending thermistor externally pivotally mounted on the rear of the heater housing for movement from a storage position behind the housing to an upraised operative position, thermistor also being used to supply a room temperature signal to an ambient temperature display device on the heater housing. Furthermore, the heater includes a selectively actuable energy saving feature which, when actuated, automatically reduces by 5 degrees F. after a period of one hour the temperature to which the heater has been pre-set by the operator.

Claims

1. An electrically-powered portable space heater comprising:

a. an elongated housing having at least one intake opening through which ambient air may be drawn and at least one exhaust opening through which heated air may be discharged, said elongated housing having a top portion;

b. electrically-powered fan means disposed within said elongated housing for drawing ambient air through said at least one intake opening and discharging heated air through said at least one exhaust opening;

c. at least one vertically extending fin-tube heating element disposed within said elongated housing for heating the air drawn through said at least one intake opening, each of said at least one vertically extending fin-tube heating element comprising at least one resistance-type heating coil;

d. means for supplying said fan means and said at least one vertically extending fin-tube heating element with electrical current;

e. means for measuring ambient room temperture, said measuring means comprising a sensor, said sensor being mounted on said top portion of said elongated housing for movement from a use portion where it is projecting upwardly above said top portion to a storage position where it is behind said top portion;

f. a control panel in said top portion of said elongated housing; and

g. a display in said control panel, said display being responsive to a signal generated by said sensor for displaying the ambient room temperature measured by said measuring means.

2. The electrically-powered portable space heater as claimed in claim 1 further comprising means disposed within said control panel in said elongated housing and responsive to a signal generated by said sensor for controlling the operation of said at least one vertically extending fin-tube heating element so that a sufficient amount of heat is discharged thereby to cause the ambient room temperature to be maintained at a pre-set temperature.

3. The electrically-powered portable space heater as claimed in claim 2 wherein said controlling means is selectively actuable.

4. The electrically-powered portable space heater as claimed in claim 2 further comprising selectively-actuable energy saver timer means for automatically reducing the pre-set temperature maintained by said thermostat means by a given number of degrees after a fixed period of time.

5. The electrically-powered portable space heater as claimed in claim 4 wherein said selectively-actuable energy saver timer means automatically reduces the pre-set temperature maintained by said thermostat means by 5 degrees F. after a period of one hour.

6. The electrically-powered portable space heater as claimed in claim 1 further comprising temperature responsive means responsive to an overheat condition in said housing for disabling said at least one resistance-type heating coil disposed within said at least one vertically extending fin-tube heating elements should an overheat condition occur.

7. The electrically-powered portable space heater as claimed in claim 1 wherein said sensor is pivotally adjustable relative to said elongated housing.

13. The electrically-powered portable space heater as claimed in claim 1 further comprising temperature responsive means responsive to an overheat condition in said housing for disabling said at least one electrically powered heating element should an overheat condition occur.

8. An electrically-powered portable space heater comprising:

a. a housing having at least one opening through which heated air may pass, said housing having a top portion;

b. at least one electrically-powered heating element disposed within said housing;

c. means for supplying said at least one electrically-powered heating element with electrical current;

d. means for measuring ambient room temperature, said measuring means comprising a sensor, said sensor being mounted on said top portion of said elongated housing for movement from a use portion where it is projecting upwardly above said top portion to a storage position where it is behind said top portion;

e. a control panel in said top portion of said elongated housing;

f. a display in said control panel, said display being responsive to a signal generated by said sensor for displaying the ambient room temperature measured by said measuring means; and

g. means disposed within said control panel and responsive to a signal generated by said sensor for controlling the operation of said at least one electrically powered heating element so that a sufficient amount of heat is discharged thereby to cause the ambient room temperature to be maintained at a pre-set temperature.

9. The electrically-powered portable space heater as claimed in claim 8 further comprising temperature responsive means responsive to an overheat condition in said housing for disabling said at least one electrically powered heating element should an overheat condition occur.

10. The electrically-powered portable space heater as claimed in claim 8 wherein said sensor is pivotally adjustable relative to said housing.

11. An electrically-powered portable space heater comprising:

a. a housing having at least one opening through which heated air may pass, said housing having a top portion, a control panel in said top portion;

b. at least one electrically-powered heating element disposed within said housing;

c. means to supply said electrically-powered heating element with electrical current;

d. means for measuring ambient room temperature, said measuring means comprising a sensor externally mounted on said top portion of elongated housing at a location remote from said at least one exhaust opening and movable from a use position wherein it is projecting upward above said top portion to a storage position where it is behind said top portion,

e. means disposed within said control panel in said housing and responsive to a signal generated by said sensor for controlling the operation of said at least one electrically-powered heating element so that a sufficient amount of heat is discharged thereby to cause the ambient room temperature to be maintained at a pre-set temperature; and

f. selectively-actuable energy saver timer means for automatically reducing the pre-set temperature maintained by said thermostat means by a given number of degrees after a fixed period of time.

12. The electrically-powered portable space heater as claimed in claim 11 wherein said selectively-actuable energy saver timer means automatically reduces the pre-set temperature maintained by said controlling means by 5 degrees F. after a period of one hour.

14. The electrically-powered portable space heater as claimed in claim 11 wherein said sensor is pivotally adjustable relative to said housing.