Air duct assemblys, and fan heaters

Patent metadata

Field	Value
Publication number	US-11174871-B2
Application number	US-201816624846-A
Country	US
Kind code	B2
Filing date	Apr 20, 2018
Priority date	Jun 30, 2017
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

Disclosed are an air duct assembly and a fan heater applying in the air duct assembly, which includes a volute tongue positioned in the volute forms an air duct with the volute. The air duct is configured with an air inlet and an air outlet. A cross-flow wind turbine positioned in the air duct introduce the airflow into the air duct from the air inlet, and blow out the airflow in the air duct through the air outlet. The volute includes a first volute tongue member, the size of the angle between the line connecting the root portion M of the first volute tongue member to the axis O of the cross-flow wind turbine and the line connecting the root portion N of the second volute tongue member to the axis O of the cross-flow wind turbine on the same cross-section is from 110° to 170°.

First claim

What is claimed is:

1. An air duct assembly, applied to a fan heater, comprising:
a volute comprising a first volute tongue member;
a volute tongue positioned in the volute, cooperated with the volute to define an air duct having an air inlet and an air outlet, and comprising a second volute tongue member; and
a cross-flow wind turbine positioned in the air duct, and configured to introduce an airflow into the air duct through the air inlet, and blow the airflow in the air duct out through the air outlet;
wherein the first volute tongue member and the second volute tongue member are respectively located at two sides of the air inlet; and
wherein on a same cross section, an angle between a first line connecting a root portion M of the first volute tongue member to an axis O of the cross-flow wind turbine and a second line connecting a root portion N of the second volute tongue member to the axis O of the cross-flow wind turbine is in a range of 110° to 170°;
wherein the volute comprises: two ends disposed along an axial direction of the cross-flow wind turbine, and each of the two ends define a mounting hole, and
wherein the volute tongue comprises two mounting columns corresponding to the mounting holes, and each of the mounting columns is inserted into each corresponding mounting hole.

2. The air duct assembly according to claim 1 ,
wherein a minimum distance B between the first volute tongue member and the cross-flow wind turbine is in a range of 2 mm to 4 mm.

3. The air duct assembly according to claim 1 ,
wherein a minimum distance C between the second volute tongue member and the cross-flow wind turbine is in a range of 2 mm to 4 mm.

4. The air duct assembly according to claim 1 ,
wherein the volute further comprises:
a first air deflector extending towards the air outlet from the first volute tongue member and comprising:
a first end adjacent to the air outlet;
a second end away from the air outlet; and
a protrusion positioned between the first end and the second end, and facing the air duct.

5. The air duct assembly according to claim 4 ,
wherein the volute tongue further comprises:
a second air deflector extending towards the air outlet from the second volute tongue member;
wherein a surface of the first air deflector located outside the air duct or a surface of the second air deflector located outside the air duct is provided with a wire buckle.

6. The air duct assembly according to claim 4 ,
wherein the protrusion is at the first end of the first air deflector adjacent to the air outlet, and
wherein a distance D between the root portion N and the protrusion is the shortest distance between the root portion N of the second volute tongue member and any point on the first air deflector.

7. The air duct assembly according to claim 6 ,
wherein a ratio of the distance D to a width E of air outlet is 1:2 to 1:2.5.

8. The air duct assembly according to claim 7 ,
wherein the distance D is in a range of 18 mm to 30 mm.

9. A fan heater, comprising:
a housing; and
an air duct assembly, applied to the fan heater, comprising:
a volute comprising a first volute tongue member;
a volute tongue positioned in the volute, cooperated with the volute to define an air duct having an air inlet and an air outlet, and comprising a second volute tongue member; and
a cross-flow wind turbine positioned in the air duct, and configured to introduce an airflow into the air duct through the air inlet, and blow the airflow in the air duct out through the air outlet;
wherein the first volute tongue member and the second volute tongue member are respectively located at two sides of the air inlet; and
wherein on a same cross section, an angle between a first line connecting a root portion M of the first volute tongue member to an axis O of the cross-flow wind turbine and a second line connecting a root portion N of the second volute tongue member to the axis O of the cross-flow wind turbine is in a range of 110° to 170°, wherein the air duct assembly is in the housing;
wherein the volute comprises: two ends disposed along an axial direction of the cross-flow wind turbine, and each of the two ends define a mounting hole;
wherein the volute tongue comprises two mounting columns corresponding to the mounting holes, and each of the mounting columns is inserted into each corresponding mounting hole.

10. The fan heater according to claim 9 ,
wherein the volute or the volute tongue of the air duct assembly comprises a positioning lug having a first positioning hole; and the housing of the fan heater comprises a positioning column fitted into the first positioning hole.

11. The fan heater according to claim 9 ,
wherein the volute of the air duct assembly comprises a fixing column extended towards and fixed to the housing of the fan heater.

12. The fan heater according to claim 9 ,
wherein a minimum distance B between the first volute tongue member and the cross-flow wind turbine is in a range of 2 mm to 4 mm.

13. The fan heater according to claim 9 ,
wherein a minimum distance C between the second volute tongue member and the cross-flow wind turbine is in a range of 2 mm to 4 mm.

14. The fan heater according to claim 9 ,
wherein the volute further comprises:
a first air deflector extending towards the air outlet from the first volute tongue member and comprising:
a first end adjacent to the air outlet;
a second end away from the air outlet; and
a protrusion positioned between the first end and the second end, and facing the air duct.

15. The fan heater according to claim 14 ,
wherein the volute tongue further comprises:
a second air deflector extending towards the air outlet from the second volute tongue member;
wherein a wire buckle is arranged on a surface of the first air deflector located outside the air duct or on a surface of the second air deflector outside the air duct.

16. The fan heater according to claim 14 ,
wherein the protrusion is at the first end of the first air deflector adjacent to the air outlet, and
wherein a distance D between the root portion N and the protrusion is the shortest distance between the root portion N of the second volute tongue member and any point on the first air deflector.

17. The fan heater according to claim 16 ,
wherein a ratio of the distance D to a width E of air outlet is 1:2 to 1:2.5.

18. The fan heater according to claim 17 ,
wherein the distance D between the root portion N of the second volute tongue member and the protrusion is in a range of 18 mm to 30 mm.

Assignees

• Gd Midea Env Appliances Mfg Co Ltd
• Midea Group Co Ltd

Inventors

• Wang Qing
• Ma Lie
• Tan Chengbo

Classifications

• F24H3/0411

  for domestic or space-heating systems · CPC title

• F04D29/422 Primary

  Discharge tongues (F04D17/04 takes precedence) · CPC title

• F24D15/00 Primary

  Other domestic- or space-heating systems · CPC title

• F04D17/04

  of transverse-flow type · CPC title

• Y02B30/00

  Energy efficient heating, ventilation or air conditioning [HVAC] · CPC title