Fan control for dehumidifier

Patent metadata

Field	Value
Publication number	US-11035580-B2
Application number	US-201916255149-A
Country	US
Kind code	B2
Filing date	Jan 23, 2019
Priority date	Jan 26, 2018
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A method for controlling a fan of a dehumidifier includes performing a first step of obtaining an ambient temperature, an exhaust temperature, and a delta temperature that is a difference between the ambient temperature and the exhaust temperature. The method further include determining, after performing the first step, whether the delta temperature is within a delta temperature range. If the delta temperature is within the delta temperature range, the method proceeds back to the first step. If the delta temperature is not within the delta temperature range, the method performs a second step of determining an adjusted fan speed using the delta temperature. The method further includes performing, after performing the second step, a third step of setting the fan speed to the determined adjusted fan speed.

First claim

What is claimed is:

1. A method for controlling a fan of a dehumidifier, the method comprising:
transitioning a compressor from off to on;
setting a fan speed to a default value;
waiting a first predetermined amount of time;
after waiting the predetermined amount of time, performing a first step of obtaining:
an ambient temperature;
an exhaust temperature; and
a delta temperature comprising a difference between the ambient temperature and the exhaust temperature;

after performing the first step, determining whether the delta temperature is within a delta temperature range;
if the delta temperature is within the delta temperature range:
waiting a second predetermined amount of time; and
after waiting the second predetermined amount of time, proceeding back to the first step;

if the delta temperature is not within the delta temperature range, proceeding to a second step, the second step comprising determining an adjusted fan speed using the delta temperature;
determining whether an evaporator temperature is less than a predetermined temperature;
if the evaporator temperature is not less than the predetermined temperature, proceeding to a third step, the third step comprising setting the fan speed to the determined adjusted fan speed;
if the evaporator temperature is less than the predetermined temperature:
proceeding back to the first step if the determined adjusted fan speed is negative with respect to a current fan speed; and
proceeding to the third step if the determined adjusted fan speed is positive with respect to the current fan speed; and

after performing the third step, proceeding back to the first step after waiting the second predetermined amount of time.

2. The method for controlling the fan of the dehumidifier of claim 1 , wherein the first predetermined amount of time is:
zero seconds;
greater than zero seconds but less than or equal to five minutes; or
greater than five minutes but less than or equal to ten minutes.

3. The method for controlling the fan of the dehumidifier of claim 1 , wherein the default value of the fan speed is:
a maximum fan speed; or
a quiet-mode fan speed.

4. The method for controlling the fan of the dehumidifier of claim 1 , wherein determining whether the delta temperature is within the delta temperature range comprises determining whether the delta temperature is greater than or equal to 20 degrees Fahrenheit and less than or equal to 23 degrees Fahrenheit.

5. The method for controlling the fan of the dehumidifier of claim 1 , wherein the delta temperature range comprises:
a constant range; or
a variable range based on the ambient temperature.

6. The method for controlling the fan of the dehumidifier of claim 1 , wherein the second predetermined amount of time is:
zero seconds;
greater than zero seconds but less than or equal to one minute; or
greater than one minute but less than or equal to five minutes.

7. The method for controlling the fan of the dehumidifier of claim 1 , wherein the predetermined temperature comprises 32 degrees Fahrenheit.

8. The method for controlling the fan of the dehumidifier of claim 1 , wherein determining the adjusted fan speed using the delta temperature comprises:
calculating an adjusted delta by subtracting a target delta constant from the delta temperature; and
calculating the adjusted fan speed by multiplying the adjusted delta by a fan unit constant, the fan unit constant comprising a number of fan units per degree Fahrenheit.

9. A method for controlling a fan of a dehumidifier, the method comprising:
performing a first step of obtaining:
an ambient temperature;
an exhaust temperature; and
a delta temperature comprising a difference between the ambient temperature and the exhaust temperature;

after performing the first step, determining whether the delta temperature is within a delta temperature range;
if the delta temperature is within the delta temperature range, proceeding back to the first step after waiting a predetermined amount of time; and
if the delta temperature is not within the delta temperature range, performing a second step of determining an adjusted fan speed using the delta temperature;
after performing the second step, performing a third step of setting the fan speed to the determined adjusted fan speed; and
after performing the third step, proceeding back to the first step after waiting the predetermined amount of time.

10. The method for controlling the fan of the dehumidifier of claim 9 , wherein the predetermined amount of time is:
zero seconds;
greater than zero seconds but less than or equal to five minutes; or
greater than five minutes but less than or equal to ten minutes.

11. The method for controlling the fan of the dehumidifier of claim 9 , wherein determining whether the delta temperature is within the delta temperature range comprises determining whether the delta temperature is greater than or equal to 20 degrees Fahrenheit and less than or equal to 23 degrees Fahrenheit.

12. The method for controlling the fan of the dehumidifier of claim 9 , wherein the delta temperature range comprises:
a constant range; or
a variable range based on the ambient temperature.

13. The method for controlling the fan of the dehumidifier of claim 9 , wherein the predetermined temperature comprises 32 degrees Fahrenheit.

14. The method for controlling the fan of the dehumidifier of claim 9 , wherein determining the adjusted fan speed using the delta temperature comprises:
calculating an adjusted delta by subtracting a target delta constant from the delta temperature; and
calculating the adjusted fan, speed by multiplying the adjusted delta by a fan unit constant, the fan unit constant comprising a number of fan units per degree Fahrenheit.

15. A method comprising:
performing a first step of obtaining:
an ambient temperature;
an exhaust temperature; and
a delta temperature comprising a difference between the ambient temperature and the exhaust temperature;

after performing the first step, determining whether the delta temperature is within a delta temperature range;
if the delta temperature is within the delta temperature range, proceeding back to the first step;
if the delta temperature is not within the delta temperature range, performing a second step of determining an adjusted fan speed using the delta temperature; and
after performing the second step, performing a third step of setting the fan speed to the determined adjusted fan speed.

16. The method of claim 15 , wherein determining whether the delta temperature is within the delta temperature range comprises determining whether the delta temperature is greater than or equal to 20 degrees Fahrenheit and less than or equal to 23 degrees Fahrenheit.

17. The method of claim 15 , wherein the delta temperature range comprises a constant range.

18. The method of claim 15 , wherein the delta temperature range comprises a variable range based on the ambient temperature.

19. The method of claim 15 , wherein the predetermined temperature comprises 32 degrees Fahrenheit.

20. The method of claim 15 , wherein determining the adjusted fan speed using the delta temperature comprises:
calculating an adjusted delta by subtracting a target delta constant from the delta temperature; and
calculating the adjusted fan speed by multiplying the adjusted delta by a fan unit constant, the fan unit constant comprising a number of fan units per degree Fahrenheit.

Assignees

• Therma Stor Llc

Inventors

• Verhoeven Jerome
• Stearns Jared M
• Dubois Conor
• Demonte Todd R

Classifications

• F24F3/1405 Primary

  in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit · CPC title

• F24F2221/125

  mounted on wheels · CPC title

• F24F11/30

  for purposes related to the operation of the system, e.g. for safety or monitoring · CPC title

• F24F1/0358

  with dehumidification means · CPC title

• F24F13/30

  Arrangement or mounting of heat-exchangers · CPC title