CN212179046U

CN212179046U - Fan coil

Info

Publication number: CN212179046U
Application number: CN202020664798.0U
Authority: CN
Inventors: 智博文; 颜鲁华; 张震; 陈晓伟; 田伟
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-12-18
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses a fan coil, include: a housing in which an installation space is formed; the heat exchanger is arranged in the shell and is used for exchanging heat with air; the centrifugal fan is arranged in the installation space and used for blowing the air flow sucked by the external air to the heat exchanger and then blowing the air flow out, and the centrifugal fan comprises: the volute comprises a volute wall and is positioned above the air outlet part, a concave part is arranged on the side surface of the volute wall close to the air outlet part, and the concave part is arranged at the end part of the volute wall and can rectify and break vortex of air flow at the air outlet part; the volute tongue wall is positioned below the air outlet part and is opposite to the volute casing wall, and a puncture part which can crush the separation vortex at the edge of the end part of the volute tongue wall is arranged at the edge of the end part of the volute tongue wall. Through the utility model provides a there is the problem that trailing edge noise, user experience comfort level are poor in prior art fan coil pipe.

Description

Fan coil

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to a fan coil structure's improvement.

Background

The existing fan coil comprises a shell, a centrifugal fan is arranged in the shell and comprises a volute, the volute is provided with a fan air outlet and comprises a volute tongue wall and a volute wall, an impeller is arranged in the volute, and when airflow enters the volute, the impeller rotating at a high speed is used for accelerating the air and discharging the air through the fan outlet; when the air flow flows through the smooth outlet surface of the fan, the air flow forms a boundary layer on the outlet surface of the fan, so that the air flow at the outlet of the fan is separated to generate vortex shedding, and pressure pulsation is caused, so that noise, namely tail edge noise is generated, the sound is not soft, and the user experience comfort level is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of trailing edge noise and poor user experience comfort of the fan coil in the prior art, the invention provides the fan coil, wherein the volute is provided with the concave part and the puncture part, so that the trailing edge noise value at the air outlet of the centrifugal fan is reduced, and the integral noise level of the fan is reduced.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a fan coil, include: a housing in which an installation space is formed;

the heat exchanger is arranged in the shell and is used for exchanging heat with air;

it is characterized by also comprising:

the centrifugal fan is arranged in the installation space and used for blowing the air flow sucked by the external air to the heat exchanger and then blowing the air flow out, and the centrifugal fan comprises:

the spiral case, be formed with air-out portion on the spiral case, the spiral case including:

the volute wall is positioned above the air outlet part, a concave part is arranged on the side surface of the volute wall close to the air outlet part, and the concave part is arranged at the end part of the volute wall and can rectify and break vortex of air flow at the air outlet part;

the volute tongue wall is positioned below the air outlet part and is opposite to the volute casing wall, and a puncture part which can crush the separation vortex at the edge of the end part of the volute tongue wall is arranged at the edge of the end part of the volute tongue wall.

In some embodiments of the present application, the plurality of the concave portions are arranged along a width direction of the volute wall, and the plurality of the concave portions are arranged at equal intervals or at unequal intervals.

In some embodiments of the present application, the recess is a groove extending from inside to outside in the outflow direction of the airflow to the end of the volute tongue wall.

In some embodiments of the present application, the bottom wall of the groove is an inclined surface, and a distance between the bottom wall and a side surface of the volute casing wall close to the air outlet portion gradually increases along an airflow outflow direction.

In some embodiments of the present application, the groove has a depth d1 along the thickness of the volute wall, d1 is 0.2-0.8mm, a width w along the width of the volute wall, w is 1.2-3mm, and a length l along the length of the volute wall, l is 15-80 mm.

In some embodiments of the present application, the plurality of the puncturing parts are arranged along the width direction of the tongue wall, and a space is formed between adjacent puncturing parts.

In some embodiments of the present application, the piercing portion is a triangular serration or a quadrangular serration.

The technical scheme of the utility model prior art relatively has following technological effect:

the utility model provides a fan coil, the position department that punctures at snail tongue wall end position is provided with punctures, can impel the wall boundary layer to drop the vortex through punctures and break, makes big vortex change into little vortex, thereby has reduced the pulsating amplitude of air velocity along the flow direction;

and set up the depressed part on the volute wall, can play the broken effect in whirlpool of rectification through the depressed part for originally turbulent air current flows through the depressed part after the situation of flowing more smoothly, and the loss of flow can reduce, plays the effect of making an uproar.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a corresponding overall structure diagram in an embodiment of the fan coil of the present invention;

FIG. 2 is a schematic structural view of a centrifugal fan in the fan coil of the present invention;

FIG. 3 is a schematic view of a structure of a recess of a centrifugal fan in a fan coil according to the present invention;

FIG. 4 is a schematic structural view of a recessed portion in a fan coil according to the present invention;

FIG. 5 is a schematic structural view of a piercing portion of a centrifugal fan in a fan coil according to the present invention;

fig. 6 is a schematic structural view of a piercing part in the fan coil of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The utility model provides an embodiment of fan coil, include:

a cabinet 100 in which an installation space is formed in the cabinet 100;

and a heat exchanger (not shown) provided in the cabinet 100 for exchanging heat with air.

And a centrifugal fan 300 disposed in the installation space and configured to blow an airflow sucked by the external air toward the heat exchanger, wherein in some embodiments, the centrifugal fan 300 is a multi-blade centrifugal fan 300.

When the fan coil works, air fluid in the room is sucked in through the centrifugal fan 300 in a circulating mode, the air fluid is heated by absorbing heat or cooled by releasing heat on the surface area of fins of the heat exchanger 200, wherein the flow of cold water or hot water of the coil can be controlled by the electric valve, the treated air fluid is respectively sent to air outlets in each air-conditioning room through the air supply pipeline, the purpose of cooling or heating the air fluid in the room is achieved, and therefore the temperature of the air in the room can be kept within the set temperature range of the room temperature controller.

Meanwhile, the unit has three different gears of high, medium and low to adjust the flow of air fluid sucked by the fan, and the unit also introduces fresh air by being placed outside the room to keep certain fresh air quantity and ventilation times in the room, so that the comfort of the environment in the room is ensured. The cold water or hot water in the coil pipe is supplied together by a host machine or a heating boiler. The fan coil has the advantages of small volume structure, simple control, easy maintenance, easy installation and the like, and can be widely used in rooms with low requirements on temperature and humidity precision, more rooms in buildings, small inner area and independent air conditioning.

The centrifugal fan 300 in this application includes:

the volute 400 comprises a volute 400 body and a volute tongue, wherein an air outlet portion 410 is formed on the volute 400, the air outlet portion 410 is an air outlet formed on the volute 400, the volute 400 body comprises a volute wall 420, the volute tongue is correspondingly connected with the volute 400 body, the volute wall 420 is positioned above the air outlet portion 410, a concave portion 421 is arranged on the side surface of the volute wall 420 close to one side of the air outlet portion 410, and the concave portion 421 is arranged at a position close to the end portion of the volute wall 420 and can rectify and break vortex of air flow at the air outlet portion 410;

a volute tongue wall 430 located below the air outlet portion 410 and opposite to the volute casing wall 420, and a puncture portion 431 is provided at an end edge of the volute tongue wall 430.

When the centrifugal fan 300 works, the airflow is sucked into the volute 400, and is discharged from the air outlet after acting through the impeller. Due to the spiral structure of the volute 400, the airflow discharged from the air outlet and close to the side of the volute wall 420 is blown out in parallel and outwards parallel to the side surface of the volute wall 420, and when the airflow is blown out, a boundary layer is generated at the edge of the volute wall 420, and a shedding vortex is generated at the boundary layer. Since the concave portion 421 is provided at the end of the volute wall 420 in the present embodiment, and is perpendicular to the airflow flowing direction, the falling vortex generated at the boundary layer position is broken by the concave portion 421, and the larger vortex can be broken into the smaller vortex by the action of the concave portion 421, so as to realize the vortex breaking action.

Simultaneously, can also play the effect of direction rectification through depressed part 421 in this embodiment, the air current of air outlet is when outwards flowing out, and accessible depressed part 421 carries out the water conservancy diversion, and the water conservancy diversion effect through depressed part 421 can make originally disorderly air current flow situation more smooth and easy, and the loss of flow reduces, and then has also played the effect of making an uproar.

When the centrifugal fan 300 works, the airflow which is blown out from the air outlet and is close to the side of the volute tongue wall 430 is blown out spirally downwards, and shedding vortexes are also generated at the edge of the volute tongue wall 430.

In some embodiments of the present application, the plurality of the concave portions 421 are provided, and are provided along a width direction of the volute wall 420, where the width direction of the volute wall 420 is a direction perpendicular to a flow direction of the airflow at the air outlet, and the plurality of concave portions 421 may be arranged at equal intervals or at unequal intervals.

In some embodiments of the present application, the recess 421 is a groove, preferably an elongated groove, which is opened on the volute wall 420 near the air outlet, and the groove is arranged to extend from a position near the volute wall 420 to the end of the first volute tongue wall 430 along the air outflow direction.

That is, the groove in this application is a groove with a certain length opened along the airflow flowing direction, and extends from the opened position to the end position of the first volute tongue wall 430.

In some embodiments, the bottom wall of the groove is a slope, and the distance between the bottom wall and the side of the volute wall 420 close to the air outlet 410 is gradually larger along the air outflow direction. Through setting up the diapire into the inclined plane, can play certain guide effect to the air current, let the structure of recess more level and smooth for the air current can be more steady transition past.

In some embodiments of the present application, the specific structure of the groove is: the depth d1 along the thickness direction of the volute wall 420, d1 0.2-0.8mm, the width w along the width direction of the volute wall 420, w 1.2-3mm, the length l along the length direction of the volute wall 420, l 15-80mm, and the length direction of the volute wall 420 referred to herein refers to the direction parallel to the flow direction of the airflow.

In some embodiments of the present application, the plurality of the puncturing parts 431 are arranged along the width direction of the volute tongue wall 430, and adjacent puncturing parts 431 have a space therebetween. The width direction of the volute tongue wall 430 in this application refers to a direction perpendicular to the direction of airflow. After the vortex shedding at the end edge of the volute tongue wall 430 is broken by the puncture parts 431, the large vortex is broken into a plurality of small vortices, and the small vortex flows out through the gap between the two puncture parts 431.

In some embodiments of the present application, the plurality of puncturing parts 431 are disposed at equal intervals or at unequal intervals.

In some embodiments of the present application, the puncturing part 431 is a triangular saw tooth or a quadrangular saw tooth. The adoption of a sawtooth structure can realize the crushing of a larger vortex group.

The fan coil pipe provided by the utility model can promote the breaking of the falling vortex of the wall surface boundary layer through the puncturing part 431, so that the large vortex is converted into the small vortex, thereby reducing the amplitude of the airflow velocity pulsation along the flow direction,

the recess 421 of the volute wall 420 can achieve the function of rectifying and breaking vortex, so that the original turbulent airflow flows more smoothly after flowing through the recess 421, the flow loss is reduced, and the noise reduction effect is achieved.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A fan coil, comprising: a housing in which an installation space is formed;

it is characterized by also comprising:

2. A fan coil as set forth in claim 1 wherein said depressions are plural and are disposed along the width of said volute wall, and said depressions are equally or unequally spaced.

3. A fan coil as set forth in claim 2 wherein said depression is a groove extending from inside to outside in the direction of airflow outflow to the end of said volute tongue wall.

4. A fan coil as set forth in claim 3 wherein said groove has a sloped bottom wall, and wherein the distance between said bottom wall and the side of said volute wall adjacent said outlet portion increases in the direction of airflow.

5. The fan coil of claim 4, wherein the groove has a depth d1 along the thickness of the volute wall, a d1 of 0.2-0.8mm, a width w along the width of the volute wall, w of 1.2-3mm, and a length l along the length of the volute wall, l being 15-80 mm.

6. The fan coil of claim 1, wherein the plurality of punctures are disposed along the width of the tongue wall, and wherein adjacent punctures are spaced apart.

7. A fan coil as set forth in claim 6 wherein said puncturing portion is triangular or quadrilateral.