# US 10,865,798 B2 · Fan coil unit

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- Number: US 10,865,798 B2
- Document ID: US10865798B2
- Status: Granted
- Kind: B2
- Application number: 15/866,442
- Filed: 2018-01-09
- Published: 2018-05-10
- Granted: 2020-12-15
- Earliest claimed: 2016-05-30
- Assignees: Zhongshan Broad-Ocean Motor Co., Ltd.
- Applicants: Zhongshan Broad-Ocean Motor Co., Ltd.
- Inventors: Yanhu Lin; Caisheng Tan; Jinren Guan; Jianhui Li
- Web page: https://patentgrep.com/patent/US10865798B2

## CPC

- F04D 25/08: the working fluid being air, e.g. for ventilation
- F04D 25/16: Combinations of two or more pumps {; Producing two or more separate gas flows}
- F04D 25/166: {using fans}
- F04D 29/0413: {hydrostatic; hydrodynamic thrust bearings}
- F04D 29/263: {mounting fan or blower rotors on shafts}
- F04D 29/441: {especially adapted for elastic fluid pumps}
- F04D 29/582: {specially adapted for elastic fluid pumps}
- F04D 29/5826: {Cooling at least part of the working fluid in a heat exchanger}
- F04D 29/664: {by means of sound absorbing material}
- F24F 1/0022: Centrifugal or radial fans
- F24F 1/0033: having two or more fans
- F24F 13/24: Means for preventing or suppressing noise
- F04D 17/16: for displacing without appreciable compression
- F05D 2250/52: Outlet
- F24F 2013/242: {Sound-absorbing material}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A fan coil unit, including: a blower including a volute, a wind wheel, and a motor; a fan housing; a heat exchanger; and a hydrostatic plate. The volute includes a first chamber, a first air inlet, and a first air outlet. The wind wheel is disposed in the first chamber of the volute. The motor includes an output shaft which extends into the first chamber and is connected to the wind wheel. The fan housing includes a second chamber, a second air inlet, and a second air outlet. The heat exchanger is disposed in the second chamber and is located between the second air inlet and the second air outlet. The volute further includes a volute tongue which is close to the first air outlet. The hydrostatic plate is connected to the volute tongue. The hydrostatic plate includes an upper end and a lower end.

## Claims

### Claim 1

A fan coil unit, comprising:
a blower comprising a volute, a wind wheel, and a motor; the volute comprising a first chamber, a first air inlet, a first air outlet having two sides, and a volute tongue; and the motor comprising an output shaft;
a heat-exchanger housing comprising a top plate, a bottom plate, a rear plate having a second air inlet, two side plates, a second chamber, and a second air outlet;
a heat exchanger;
an air-guiding plate comprising an upper end, a lower end, and two side ends; and
two air-guiding side plates;
wherein:
the wind wheel is disposed in the first chamber of the volute;
the output shaft extends into the first chamber and is connected to the wind wheel;
a top of the first air outlet is connected to a top of the second air inlet;
the heat exchanger is disposed in the second chamber and is located between the second air inlet and the second air outlet;
the volute tongue is disposed adjacent to the first air outlet; and the air-guiding plate is connected to the volute tongue;
the air-guiding plate is disposed in an inclined way;
the upper end of the air-guiding plate is connected to the volute tongue, and the lower end of the air-guiding plate extends towards the heat exchanger;
the two air-guiding side plates are disposed at the two sides of the first air outlet, respectively; and the two air-guiding side plates are connected to the two side ends of the air-guiding plate, respectively;
the lower end of the air-guiding plate is connected to the bottom plate; and
the air-guiding plate is inclined with respect to the top plate at an angle a, and 75°>a>30°; parameters of the volute fulfill the following formula: Hscmax>(Hex1+Hex2); Hex1/D2≥0.112; Hex2/D2≤0.685, wherein Hscmax represents a vertical distance between a center of the wind wheel and a highest point of the volute; Hex2 represents a vertical distance between the top of the first air outlet and a top point of the volute tongue; Hex1 represents a vertical distance between the top point of the volute tongue and the center of the wind wheel; and D2 represents an outer diameter of the wind wheel.

### Claim 2 (depends on 1)

The fan coil unit of claim 1, wherein the parameters of the volute fulfill the following formula: 1.65≥2*b2/D2≥1.45, where b2 represents an effective width of the wind wheel, and D2 represents an outer diameter of the wind wheel.

### Claim 3 (depends on 2)

The fan coil unit of claim 2, wherein a relation between the effective width of the wind wheel and a width of the volute fulfills the following formula: 0.98≥2*b2/B2≥0.845, where B2 represents the width of the volute.

### Claim 4 (depends on 3)

The fan coil unit of claim 3, wherein a relation between an arc radius of the first air inlet of the volute and the outer diameter of the wind wheel fulfills the following formula: 0<r/D2≤0.069, where r represents the arc radius of the first air inlet.

### Claim 5 (depends on 4)

The fan coil unit of claim 4, wherein the air-guiding side plates are vertically disposed with regard to the top plate.

### Claim 6 (depends on 5)

The fan coil unit of claim 5, wherein the air-guiding side plates extend from the first air outlet to a middle section of the air-guiding plate, and the air-guiding side plates and the air-guiding plate are both disposed in the second chamber.

### Claim 7 (depends on 6)

The fan coil unit of claim 6, wherein the air-guiding plate comprises a flat surface for guiding air out from the first air outlet into the second chamber, the second air inlet is located at an upper part of the rear plate, and the second air outlet is located at an upper part of the heat-exchanger housing.

### Claim 8 (depends on 4)

The fan coil unit of claim 4, wherein the bottom plate comprises a baseplate and a guide plate connected to the baseplate; the guide plate inclines upwards; an upper end of the guide plate is connected to a bottom of the second air outlet; the top plate, the baseplate, the rear plate, and the two side plates form a rectangular structure; and the second air inlet is disposed at an upper part of the rear plate.

### Claim 9 (depends on 8)

The fan coil unit of claim 8, wherein the heat exchanger is disposed vertically or slantly in the second chamber; two ends of the heat exchanger are connected to the top plate and the bottom plate, respectively.

### Claim 10 (depends on 9)

The fan coil unit of claim 9, wherein the air-guiding plate comprises a plurality of through holes; a third chamber is confined by the rear plate, the two side plates, the air-guiding plate, and the bottom plate; and the third chamber is filled with the damping material.

### Claim 11 (depends on 4)

The fan coil unit of claim 4, wherein the second air inlet is disposed at an upper part of the rear plate; the bottom plate comprises a baseplate having a front portion, and a guide plate that is connected to the front portion of the baseplate; the lower end of the air-guiding plate is connected to the front portion of the baseplate; the guide plate inclines upwards; an upper end of the guide plate is connected to a bottom of the second air outlet; and the second air outlet is enclosed by the two side plates, the top plate, and the upper end of the guide plate.

### Claim 12 (depends on 11)

The fan coil unit of claim 11, wherein the front portion of the baseplate is parallel to the top plate; the heat exchanger is disposed vertically or slantly in the second chamber; two ends of the heat exchanger are connected to the top plate and the front portion of the baseplate, respectively.

### Claim 13 (depends on 12)

The fan coil unit of claim 12, wherein the air-guiding plate is made of a damping material.

### Claim 14 (depends on 8)

The fan coil unit of claim 8, wherein the blower comprises two volutes, two wind wheels, and one motor; two second air inlets are disposed at one side of the heat-exchanger housing; the two volutes are respectively disposed at two sides of the motor; the two wind wheels are disposed in the two volutes, respectively; two shaft extensions of the motor are connected to the two wind wheels, respectively; two first air outlets of the two volutes communicate with the two second air inlets of the heat-exchanger housing, respectively.

### Claim 15 (depends on 14)

The fan coil unit of claim 14, wherein the air-guiding plate comprises a curved surface for guiding air out from the two first air outlet into the second chamber, the heat exchanger is slantly disposed, and the air-guiding plate and the heat exchanger tilt towards a same direction.

### Claim 16 (depends on 1)

The fan coil unit of claim 1, wherein the parameters of the volute fulfill the following formula: 1.65≥2*b2/D2≥1.45, where b2 represents an effective width of the wind wheel, and D2 represents an outer diameter of the wind wheel.

### Claim 17 (depends on 16)

The fan coil unit of claim 16, wherein a relation between the effective width of the wind wheel and a width of the volute fulfills the following formula: 0.98≥2*b2/B2≥0.845, where B2 represents the width of the volute.

### Claim 18 (depends on 17)

The fan coil unit of claim 17, wherein a relation between an arc radius of the first air inlet of the volute and the outer diameter of the wind wheel fulfills the following formula: 0<r/D2≤0.069, where r represents the arc radius of the first air inlet.

### Claim 19 (depends on 18)

The fan coil unit of claim 18, wherein and the air-guiding side plates are vertically disposed with regard to the top plate.