CN112050296A - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- CN112050296A CN112050296A CN202010488874.1A CN202010488874A CN112050296A CN 112050296 A CN112050296 A CN 112050296A CN 202010488874 A CN202010488874 A CN 202010488874A CN 112050296 A CN112050296 A CN 112050296A
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- Prior art keywords
- distance
- fan
- air conditioner
- flow fan
- heat exchanger
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 238000004378 air conditioning Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 description 11
- 230000007423 decrease Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0025—Cross-flow or tangential fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Provided is an air conditioner which can efficiently increase the size of a heat exchanger and a cross flow fan. When the distance between the inner surface of the front component of the heat exchanger and the outer peripheral surface of a fan, i.e., a cross-flow fan, is La, the distance between the inner surface of the rear component and the outer peripheral surface of the fan is Lb, the average value of the distance La and the distance Lb is L, and the diameter of the fan is D, D is not less than 125mm, and 60 not less than L/(D/2) is not less than 0.45.
Description
Technical Field
The present invention relates to an air conditioner including a cross flow fan and a heat exchanger.
Background
A conventional air conditioner is known to include a cross-flow fan and a heat exchanger, as disclosed in, for example, japanese patent No. 6058242. Specifically, in this air conditioner, a heat exchanger is provided in front and rear of the cross flow fan, and has an air inlet on the upper surface and an air outlet at the lower portion of the front surface.
In recent years, the size of basic performance components such as a heat exchanger and a cross-flow fan has been increased due to energy saving of such an air conditioner.
Disclosure of Invention
Technical problem to be solved by the invention
However, if only the size of the cross flow fan is increased, the performance such as the required air volume and power consumption is degraded, and the characteristics such as static pressure and sound are also degraded, so that there is a problem that the size of the heat exchanger and the size of the cross flow fan cannot be increased efficiently.
In addition, the problem of static pressure and noise has been dealt with mainly by changing the shape of the air passage and adjusting the flow of air. However, this measure basically deteriorates the air volume and the power consumption efficiency required for the air conditioner.
An object of one embodiment of the present invention is to provide an air conditioner in which a heat exchanger and a cross-flow fan can be increased in size with high efficiency.
Means for solving the problems
In order to solve the above problem, an air conditioner according to one aspect of the present invention includes a heat exchanger having a front component and a rear component, the front component and the rear component being disposed in a mountain shape in an inclined state in which they are inclined in opposite directions; a fan that is a cross-flow fan disposed between the front component and the rear component; and a casing that houses the heat exchanger and the fan, and that has a suction port at a position above the heat exchanger and a discharge port at a position below the fan, wherein, when a distance between an inner surface of the front component and an outer peripheral surface of the fan is La, a distance between an inner surface of the rear component and an outer peripheral surface of the fan is Lb, an average of the distance La and the distance Lb is L, and a diameter of the fan is D, D is not less than 125mm, and 0.60 not less than L/(D/2) ≧ 0.45.
Advantageous effects
According to one aspect of the present invention, the heat exchanger and the cross-flow fan can be increased in size with high efficiency.
Drawings
Fig. 1 is a perspective view showing a configuration of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a schematic explanatory view showing an internal structure of the air conditioner shown in fig. 1 viewed from the side.
Fig. 3 is a schematic view showing an internal structure of the air conditioner shown in fig. 1 when viewed from the side.
Fig. 4 is a graph showing a relationship between the rotational speed of the cross-flow fan and the volume of blown air when the distance between the cross-flow fan and the heat exchanger is changed while the diameter of the cross-flow fan is fixed in the air conditioner shown in fig. 3.
Fig. 5 is a graph showing a relationship between power consumption and an amount of air blown out of the air conditioner shown in fig. 3, in which the distance between the cross-flow fan and the heat exchanger is changed while the diameter of the cross-flow fan is fixed.
Fig. 6 is a schematic view showing an internal structure of an air conditioner according to another embodiment of the present invention, as viewed from the side.
Fig. 7 is a graph showing changes in the amount of blown air when the distance between the cross-flow fan and the rear portion of the heat exchanger is changed in the air conditioner shown in fig. 6.
Fig. 8 is a schematic view showing an internal structure of an air conditioner according to another embodiment of the present invention, as viewed from the side.
Fig. 9 is an explanatory diagram of an angle formed by a chord line of a blade of a cross flow fan provided in an air conditioner according to an embodiment of the present invention and a line connecting a center of the cross flow fan and an outer edge of the blade.
Detailed Description
[ first embodiment ]
Hereinafter, an embodiment of the present invention will be described in detail. Fig. 1 is a perspective view showing a configuration of an air conditioner 1 according to the present embodiment. Fig. 2 and 3 are schematic explanatory views showing the internal structure of the air conditioner 1 viewed from the side. Fig. 3 is a schematic view showing the internal structure of the air conditioner 1 when viewed from the side.
(outline of constitution of air conditioner 1)
As shown in fig. 1 to 3, the air conditioner 1 includes a cross-flow fan 12 at a central position in the casing 11, and a heat exchanger 13 at a position before and after the cross-flow fan 12.
The casing 11 has an air inlet 21 at an upper position and an air outlet 22 at a lower position. The air is blown out forward from the air outlet 22.
The heat exchanger 13 includes a front component 31, a rear component 32, and a front attachment 33. The front component 31 and the rear component 32 are disposed in a mountain shape in an inclined state in which they are inclined in opposite directions, and the upper ends thereof are in contact with each other at a position above the cross flow fan 12. The front attachment portion 33 is disposed opposite the rear structural portion 32. Thus, the front component 31, the rear component 32, and the front attachment 33 are formed in a shape of japanese character "コ" around the cross flow fan 12.
In the air conditioner 1, when the cross-flow fan 12 rotates, air is sucked into the casing 11 through the suction port 21, and the air passes through the heat exchanger 13 and is blown out to the front of the air conditioner 1 from the discharge port 22. The air passing through the heat exchanger 13 is cooled by the heat exchanger 13 during the cooling operation and heated by the heat exchanger 13 during the heating operation.
(distance between the Heat exchanger 13 and the Cross flow Fan 12)
In the air conditioner 1 of the present embodiment, when the distance between the inner surface of the front component 31 and the outer peripheral surface of the cross flow fan 12 is La and the distance between the inner surface of the rear component 32 and the outer peripheral surface of the cross flow fan 12 is Lb, the distance La is the distance Lb. The diameter D of the cross-flow fan 12 is not less than 125 mm.
In the air conditioner 1, when the average of the distance La and the distance Lb is L and the diameter of the cross flow fan 12 is D, the lower limit of the distance between the heat exchanger 13 and the cross flow fan 12 is satisfied
L/(D/2)≧0.45。
By setting the distance between the heat exchanger 13 and the cross-flow fan 12 as described above, the air flow around the cross-flow fan 12 is stabilized, and the occurrence of turbulence can be suppressed. Accordingly, the air conditioner 1 can efficiently increase the size of the cross flow fan 12 and the heat exchanger 13 while suppressing the generation of loss and noise due to the change in static pressure.
The upper limit of L/(D/2) is determined by the size of the air conditioner 1, but is preferably set to 0.60. Therefore, an appropriate distance between the heat exchanger 13 and the cross-flow fan 12 is preferable
0.60≥L/(D/2)≥0.45……(1)。
(process of studying appropriate distance between the heat exchanger 13 and the cross-flow fan 12) when the size of the cross-flow fan 12 is increased, the volume of air blown out from the outlet 22 of the air conditioner 1 increases. On the other hand, the air volume and the static pressure have a trade-off relationship, and if the air volume increases, the static pressure decreases. When the static pressure is lowered, the efficiency of the air conditioner 1 is lowered and the quality is lowered.
As a countermeasure for suppressing the decrease in static pressure, consideration is given to
(A) Increase the area of the suction port 21
(B) Reducing the area of the outlet 22
(C) A larger range forms a space around the heat exchanger 13.
(A) The countermeasure (2) is limited in consideration of the product size of the air conditioner 1, that is, the size increase. (B) In the countermeasure (2), the volume of air blown out from the air outlet 22 is reduced, and therefore it is difficult to effectively cope with this. Here, the inventors of the present invention focused on the countermeasure of (C), and repeated studies to solve these problems.
As a result of the research, the inventors of the present invention found that, when the distance between the heat exchanger 13 and the cross-flow fan 12 is set in a fixed range with respect to the diameter of the cross-flow fan 12, it is possible to suppress deterioration of static pressure and suppress a decrease in efficiency of the air conditioner 1. The cross flow fan 12 has blades in the circumferential direction, and pressure changes are generated by the rotation of the blades. In this pressure change, the loss due to the pressure change is reduced in the wider space. If the loss due to the pressure change is improved, the air volume increases and the power consumption decreases. It is thus found that an appropriate distance between the heat exchanger 13 and the cross-flow fan 12 is the above formula (1).
[ Effect confirmation ]
Fig. 4 is a graph showing a relationship between the rotational speed of the cross flow fan 12 and the volume of blown air when the distance between the cross flow fan 12 and the heat exchanger 13 is changed while the diameter of the cross flow fan 12 is fixed in the air conditioner 1. Fig. 5 is a graph showing a relationship between power consumption and an amount of air blown out of the air-conditioning apparatus 1 when the distance between the cross-flow fan 12 and the heat exchanger 13 is changed while the diameter of the cross-flow fan 12 is fixed in the air-conditioning apparatus 1.
Here, in the air-conditioning apparatus 1, when D is 125mm and L/(D/2) is changed, the investigation results of the relationship between the rotational speed of the cross flow fan 12 and the air volume and the relationship between power consumption and the air volume will be described. In fig. 4 and 5, L/(D/2) is (a)0.69 (69%), (b)0.61 (61%), (c)0.52 (52%), (D)0.48 (48%), (e)0.45 (45%), (f)0.42 (42%), (G)0.38 (38%), (h)0.35 (35%).
From the results of fig. 4, it can be seen that the air volume is significantly increased for the same rotational speed when L/(D/2) is greater than 0.45 ((a) to (e)), as compared with when L/(D/2) is less than 0.45 ((f) to (h)). From the results of fig. 5, it is understood that when L/(D/2) is greater than 0.42 ((a) to (f)), the power consumption is significantly reduced compared to the same air volume when L/(D/2) is less than 0.42 ((g) to (h)). Therefore, as is clear from the results shown in FIGS. 4 and 5, L/(D/2) ≧ 0.45 is preferably employed.
[ second embodiment ]
Other embodiments of the present invention are described below. For convenience of explanation, members having the same functions as those described in the first embodiment are given the same reference numerals, and the explanation thereof will not be repeated.
(relationship between distance La and distance Lb)
Fig. 6 is a schematic view showing the internal structure of the air conditioner 2 of the present embodiment when viewed from the side. In the air conditioner 2 of the present embodiment, the relationship between the distance La between the inner surface of the front component 31 and the outer peripheral surface of the cross flow fan 12 and the distance Lb between the inner surface of the rear component 32 and the outer peripheral surface of the cross flow fan 12 is defined as distance La > distance Lb.
As in the air conditioner 1, in order to prevent a decrease in the volume of blown air, the distance La and the distance Lb are preferably set to have a relationship of the distance La to the distance Lb. However, the relationship between the distance La and the distance Lb may be set to be the distance La > the distance Lb. In the air conditioner 2, the arrangement space of the heat exchanger 13 is more easily secured on the front side than on the rear side in terms of structure. Therefore, if the distance La > the distance Lb, it is easy to secure the average value L of the distance La and the distance Lb so as to satisfy L/(D/2) ≧ 0.45 in the formula (1).
(distance La > air volume in case of distance Lb)
Fig. 7 is a graph showing changes in the blown air volume when the distance Lb between the cross flow fan 12 and the rear structure 32 is changed in the air-conditioning apparatus 2 shown in fig. 6.
Here, a change in the amount of blown air when the distance La between the cross flow fan 12 and the front component 31 is fixed and the distance Lb between the cross flow fan 12 and the rear component 32 is changed is examined. Further, the rotational speed of the cross flow fan 12 is fixed. In fig. 7, the horizontal axis represents a ratio of the distance Lb to the distance La (Lb/La), and the vertical axis represents an air volume ratio in the case where the distance La is equal to the distance Lb.
As is clear from fig. 7, in the blown air volume, Lb/La decreases from around 90%, the decrease width from Lb/La to around 80% decreases, and when Lb/La is less than 80%, the decrease width increases. From this result, although it is preferable that Lb/La be 90% or more, the allowable range is more than 80% in consideration of the air volume reduction width and the space efficiency. From this result, Lb/La is preferably 1> Lb/La.gtoreq.0.8.
[ third embodiment ]
The following description relates to other embodiments of the present invention. For convenience of explanation, members having the same functions as those described in the above embodiments are given the same reference numerals, and the explanation thereof will not be repeated.
Fig. 8 is a schematic diagram showing the internal structure of the air conditioner 3 of the present embodiment when viewed from the side. As shown in fig. 8, the air-conditioning apparatus 3 is configured such that the heat exchanger 13 includes a front component 31 and a rear component 32, and the front attachment 33 is not provided. The heat exchanger 13 preferably has the front attachment 33 in terms of performance, but may have a configuration for a heat exchanger 13 of a low-cost type, for example.
[ fourth embodiment ]
The following description relates to other embodiments of the present invention. For convenience of explanation, members having the same functions as those described in the above embodiments are given the same reference numerals, and the explanation thereof will not be repeated.
Fig. 9 is an explanatory diagram of an angle formed by a chord line 42 of a blade 41 of a cross flow fan 12 and a line 43 connecting a center O of the cross flow fan 12 and an outer edge of the blade 41, which are provided in an air conditioner according to an embodiment of the present invention. As shown in fig. 9, a chord line 42 of the blade 41 of the cross flow fan 12 is inclined with respect to a line 43 connecting the center O of the cross flow fan 12 and the outer edge portion of the blade 41, and an angle θ formed by the two lines is 26 ° ≧ θ ≧ 22 °.
In general, when the angle θ of the cross flow fan 12 is about 26 °, the flow rate efficiency of suction and blowing is optimal. On the other hand, the angle θ is preferably large from the viewpoint of preventing the static pressure from decreasing, and is preferably set to 28 ° to 30 °, for example. However, in this case, the flow rate efficiency is deteriorated.
On the other hand, in the air conditioner 1, since the reduction of the static pressure is suppressed as described above, the reduction of the static pressure can be suppressed and the reduction of the volume of the blown air can be prevented by setting the angle θ to 26 ° ≧ θ ≧ 22 °. The air conditioners 2 to 3 are also the same.
(conclusion)
An air conditioner according to mode 1 of the present invention includes a heat exchanger having a front component and a rear component, the front component and the rear component being disposed in a mountain shape in an inclined state in which they are inclined in opposite directions; a fan that is a cross-flow fan disposed between the front component and the rear component; and a casing that houses the heat exchanger and the fan, and that has a suction port at a position above the heat exchanger and a discharge port at a position below the fan, wherein, when a distance between an inner surface of the front component and an outer peripheral surface of the fan is La, a distance between an inner surface of the rear component and an outer peripheral surface of the fan is Lb, an average of the distance La and the distance Lb is L, and a diameter of the fan is D, D is not less than 125mm, and 0.60 not less than L/(D/2) ≧ 0.45.
In the air conditioner according to embodiment 2 of the present invention, in the first embodiment, the relationship between the distance La and the distance Lb may be La ═ Lb.
In the air conditioner according to embodiment 3 of the present invention, in the first embodiment, the relationship between the distance La and the distance Lb may be 1> La/Lb ≧ 0.8.
An air conditioner according to aspect 4 of the present invention may be arranged such that, in any one of aspects 1 to 3, an angle θ formed by a line connecting a center of the fan and an outer edge portion of the blade of the fan and a chord line of the blade of the fan is 26 ° or more and 22 ° or more.
The present invention is not limited to the above embodiments, and various modifications can be made within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention. Further, new technical features can be formed by combining the technical methods disclosed in the respective embodiments.
Claims (4)
1. An air conditioner is provided with:
a heat exchanger having a front component and a rear component, the front component and the rear component being disposed in a mountain shape in an inclined state in which they are inclined in opposite directions;
a fan that is a cross-flow fan disposed between the front component and the rear component;
a casing that houses the heat exchanger and the fan, and that has a suction port at a position above the heat exchanger and a discharge port at a position below the fan,
the air-conditioning apparatus is characterized in that,
when the distance between the inner surface of the front component and the outer peripheral surface of the fan is La, the distance between the inner surface of the rear component and the outer peripheral surface of the fan is Lb, the average value of the distance La and the distance Lb is L, and the diameter of the fan is D, D is not less than 125mm, and 0.60 not less than L/(D/2) ≧ 0.45.
2. The air conditioner according to claim 1,
the relationship between the distance La and the distance Lb is La ═ Lb.
3. The air conditioner according to claim 1,
the relationship between the distance La and the distance Lb is 1> Lb/La.gtoreq.0.8.
4. The air conditioner according to any one of claims 1 to 3,
an angle theta formed by a line connecting the center of the fan and the outer edge portion of the blade of the fan and a chord line of the blade of the fan is 26 DEG or more and 22 DEG or more.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019106310A JP7329969B2 (en) | 2019-06-06 | 2019-06-06 | air conditioner |
| JP2019-106310 | 2019-06-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112050296A true CN112050296A (en) | 2020-12-08 |
| CN112050296B CN112050296B (en) | 2024-02-06 |
Family
ID=73608867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010488874.1A Active CN112050296B (en) | 2019-06-06 | 2020-06-02 | Air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7329969B2 (en) |
| CN (1) | CN112050296B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022176074A (en) * | 2021-05-14 | 2022-11-25 | ダイキン工業株式会社 | indoor unit |
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| CN1151494A (en) * | 1995-09-13 | 1997-06-11 | 松下电器产业株式会社 | Indoor assembly of air conditioner |
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| JP2017166457A (en) * | 2016-03-18 | 2017-09-21 | パナソニックＩｐマネジメント株式会社 | Air conditioner |
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| WO2019065857A1 (en) * | 2017-09-27 | 2019-04-04 | ダイキン工業株式会社 | Air conditioner |
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| JP4799170B2 (en) * | 2005-12-22 | 2011-10-26 | シャープ株式会社 | Air conditioner indoor unit |
| JP2010230208A (en) * | 2009-03-26 | 2010-10-14 | Sharp Corp | Indoor unit for air conditioner |
| JP2011208934A (en) * | 2011-06-02 | 2011-10-20 | Mitsubishi Electric Corp | Air conditioner |
| JP6363033B2 (en) * | 2015-02-27 | 2018-07-25 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner indoor unit and air conditioner equipped with the same |
| CN105402821B (en) * | 2015-12-30 | 2018-06-12 | 海信（山东）空调有限公司 | A kind of air conditioner indoor unit |
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| CN1151494A (en) * | 1995-09-13 | 1997-06-11 | 松下电器产业株式会社 | Indoor assembly of air conditioner |
| CN1955564A (en) * | 2005-10-27 | 2007-05-02 | 乐金电子(天津)电器有限公司 | Indoor unit of split air conditioner |
| JP2007292405A (en) * | 2006-04-26 | 2007-11-08 | Mitsubishi Electric Corp | Air conditioner |
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| CN202937509U (en) * | 2012-11-20 | 2013-05-15 | 石狮市通达电机有限公司 | Centrifugal blower and air conditioner comprising same |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7329969B2 (en) | 2023-08-21 |
| CN112050296B (en) | 2024-02-06 |
| JP2020200969A (en) | 2020-12-17 |
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