Thermal barrier coating for bearing journal surfaces of rotary shafts
US-9303688-B2 · Apr 5, 2016 · US
Fan device, and utilization unit and heat source unit of an air conditioner, hot water supplier, and air cleaner each including the fan device
US12072113B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12072113-B2 |
| Application number | US-202318222117-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 14, 2023 |
| Priority date | Jan 29, 2021 |
| Publication date | Aug 27, 2024 |
| Grant date | Aug 27, 2024 |
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- Title
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Abstract
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A fan device includes a motor and a control unit. The motor has a variable number of revolutions. The motor includes a shaft supported by a bearing enclosing lubricant. The control unit drives the motor. The control unit executes, when continuously driving the motor at a first number of revolutions or less for a first time period, driving the motor at a second number of revolutions more than the first number of revolutions for a second time period shorter than the first time period. The first number of revolutions causes poor oil film formation of the lubricant in the bearing if the motor is driven for more than the first time period. The second number of revolutions causes oil film formation of the lubricant in the bearing if the motor is driven for the second time period.
First claim
Opening claim text (preview).
The invention claimed is: 1. A fan device comprising: a motor having a variable number of revolutions, the motor including a shaft supported by a hermetically sealed bearing enclosing lubricant; and an electronic controller configured to drive the motor, the electronic controller being configured to execute, when continuously driving the motor at a first number of revolutions or less for a first time period, driving the motor at a second number of revolutions more than the first number of revolutions for a second time period shorter than the first time period, the first number of revolutions causing poor oil film formation of the lubricant in the bearing if the motor is driven for more than the first time period, and the second number of revolutions causing oil film formation of the lubricant in the bearing if the motor is driven for the second time period. 2. The fan device according to claim 1 , wherein the first number of revolution is 50 rpm or more and less than 300 rpm. 3. The fan device according to claim 2 , wherein the second number of revolution is 300 rpm or more. 4. The fan device according to claim 3 , wherein the first time period is ten minutes or more and five hours or less. 5. The fan device according to claim 4 , wherein the second time period is one second or more and two minutes or less. 6. The fan device according to claim 2 , wherein the first time period is ten minutes or more and five hours or less. 7. The fan device according to claim 2 , wherein the second time period is one second or more and two minutes or less. 8. The fan device according to claim 1 , wherein the second number of revolution is 300 rpm or more. 9. The fan device according to claim 8 , wherein the first time period is ten minutes or more and five hours or less. 10. The fan device according to claim 8 , wherein the second time period is one second or more and two minutes or less. 11. The fan device according to claim 1 , wherein the first time period is ten minutes or more and five hours or less. 12. The fan device according to claim 11 , wherein the second time period is one second or more and two minutes or less. 13. The fan device according to claim 1 , wherein the second time period is one second or more and two minutes or less. 14. A utilization unit of an air conditioner including the fan device according to claim 1 . 15. A heat source unit of an air conditioner including the fan device according to claim 1 . 16. A hot water supplier including the fan device according to claim 1 . 17. An air cleaner including the fan device according to claim 1 .
Assignees
Inventors
Classifications
Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings · CPC title
Centrifugal or radial fans · CPC title
Fans, e.g. ventilators · CPC title
with grease as lubricant · CPC title
by controlling the speed of ventilators · CPC title
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Frequently asked questions
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- What does patent US12072113B2 cover?
- A fan device includes a motor and a control unit. The motor has a variable number of revolutions. The motor includes a shaft supported by a bearing enclosing lubricant. The control unit drives the motor. The control unit executes, when continuously driving the motor at a first number of revolutions or less for a first time period, driving the motor at a second number of revolutions more than th…
- Who is the assignee on this patent?
- Daikin Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification F24F11/61. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Aug 27 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).