CN112050296B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- CN112050296B CN112050296B CN202010488874.1A CN202010488874A CN112050296B CN 112050296 B CN112050296 B CN 112050296B CN 202010488874 A CN202010488874 A CN 202010488874A CN 112050296 B CN112050296 B CN 112050296B
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- China
- Prior art keywords
- distance
- fan
- air conditioner
- heat exchanger
- flow fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000470 constituent Substances 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 abstract description 10
- 230000007423 decrease Effects 0.000 description 15
- 230000003068 static effect Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 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
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
Abstract
The efficiency is improved to enlarge the heat exchanger and the cross flow fan. When the distance between the inner surface of the front constituent part of the heat exchanger and the outer peripheral surface of the cross flow fan is La, the distance between the inner surface of the rear constituent part 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 is not less than L/(D/2) is not less than 0.45.
Description
Technical Field
The present invention relates to an air conditioner provided with a cross flow fan and a heat exchanger.
Background
In the conventional air conditioner, for example, as disclosed in japanese patent No. 6058242, a configuration including a cross flow fan and a heat exchanger is known. Specifically, in this air conditioner, a heat exchanger is provided at a front-rear position of the cross flow fan, an air intake port is provided at an upper surface thereof, and an air outlet is provided at a lower portion of a front surface thereof.
In recent years, the performance base member such as a heat exchanger and a cross-flow fan has been increased in size due to energy saving of such an air conditioner.
Disclosure of Invention
The invention aims to solve the technical problems
However, if only the cross flow fan is enlarged, there is a problem that the heat exchanger and the cross flow fan cannot be enlarged efficiently because characteristics such as static pressure and sound are changed in a direction of deterioration in addition to the performance such as the air volume and the power consumption that are required.
In addition, in order to solve the problems of static pressure and sound, the flow of air has been mainly adjusted by changing the shape of the air passage. However, such a countermeasure basically deteriorates the air volume and the power consumption efficiency required for the air conditioner.
In one aspect of the present invention, an object is to provide an air conditioner capable of effectively enlarging a heat exchanger and a cross-flow fan.
Solution to the problem
In order to solve the above problems, an air conditioner according to an aspect of the present invention includes a heat exchanger having a front constituent portion and a rear constituent portion, the front constituent portion and the rear constituent portion being disposed in a mountain-shaped manner in an inclined state in which the front constituent portion and the rear constituent portion are inclined in opposite directions; a fan that is a cross-flow fan disposed between the front constituent portion and the rear constituent portion; and a casing that accommodates the heat exchanger and the fan, and has a suction port at an upper position of the heat exchanger and a discharge port at a lower position of the fan, wherein the distance between an inner surface of the front structure and an outer peripheral surface of the fan is La, the distance between an inner surface of the rear structure and the outer peripheral surface of the fan is Lb, an average value of the distance La and the distance Lb is L, D is 125mm, and 0.60 is L/(D/2) is 0.45 or more, when the diameter of the fan is D.
Advantageous effects
According to one aspect of the present invention, the heat exchanger and the cross-flow fan can be efficiently increased in size.
Drawings
Fig. 1 is a perspective view showing the structure of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a schematic explanatory diagram showing an internal structure of the air conditioner shown in fig. 1 when viewed from the side.
Fig. 3 is a schematic diagram 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 blowout air volume when the distance between the cross flow fan and the heat exchanger is changed by fixing the diameter of the cross flow fan in the air conditioner shown in fig. 3.
Fig. 5 is a graph showing a relationship between power consumption and air volume blown out from the air conditioner in the case where the distance between the cross flow fan and the heat exchanger is changed by fixing the diameter of the cross flow fan in the air conditioner shown in fig. 3.
Fig. 6 is a schematic diagram showing an internal structure of an air conditioner according to another embodiment of the present invention when viewed from the side.
Fig. 7 is a graph showing a change in the amount of blown air when the distance between the cross flow fan and the rear of the heat exchanger is changed in the air conditioner shown in fig. 6.
Fig. 8 is a schematic diagram showing an internal structure of an air conditioner according to another embodiment of the present invention when viewed from the side.
Fig. 9 is an explanatory view of an angle formed by a chord line of a blade of a cross flow fan and a line connecting a center of the cross flow fan and an outer edge portion of the blade, which is provided in the air conditioner according to the embodiment of the present invention.
Detailed Description
[ first embodiment ]
An embodiment of the present invention is described in detail below. Fig. 1 is a perspective view showing the structure of an air conditioner 1 according to the present embodiment. Fig. 2 and 3 are schematic explanatory diagrams showing an internal structure of the air conditioner 1 when viewed from the side. Fig. 3 is a schematic diagram showing an internal configuration of the air conditioner 1 when viewed from the side.
(outline of the constitution of air conditioner 1)
As shown in fig. 1 to 3, the air conditioner 1 includes a cross flow fan 12 at a position in the center of the interior of a casing 11, and a heat exchanger 13 at a position in front of and behind the cross flow fan 12.
The housing 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 has a front configuration portion 31, a rear configuration portion 32, and a front additional portion 33. The front structure portion 31 and the rear structure portion 32 are arranged so as to form a mountain shape in an inclined state where they are inclined in opposite directions, and the upper end portions thereof are in contact with each other at positions above the cross flow fan 12. The front additional portion 33 is disposed opposite to the rear constituent portion 32. Thus, the front constituent portion 31, the rear constituent portion 32, and the front additional portion 33 are formed in a letter 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 from the suction port 21, passes through the heat exchanger 13, and is blown out from the air outlet 22 toward the front of the air conditioner 1. The air passing through the heat exchanger 13 is cooled by the heat exchanger 13 during the cooling operation, and is heated by the heat exchanger 13 during the heating operation.
(distance between the heat exchanger 13 and the crossflow fan 12)
In the air conditioner 1 of the present embodiment, when the distance between the inner surface of the front constituent unit 31 and the outer peripheral surface of the cross flow fan 12 is La and the distance between the inner surface of the rear constituent unit 32 and the outer peripheral surface of the cross flow fan 12 is Lb, the distance la=distance Lb is set. The diameter D of the cross flow fan 12 is D125 mm or more.
In the air conditioner 1, when the average value 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 set to be 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 occurrence of turbulence can be suppressed. Accordingly, the air conditioner 1 can efficiently enlarge the cross flow fan 12 and the heat exchanger 13 while suppressing the occurrence of loss or sound due to the change in the 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. Accordingly, an appropriate distance between the heat exchanger 13 and the cross flow fan 12 is preferably
0.60≥L/(D/2)≥0.45……(1)。
(a study procedure about an appropriate distance between the heat exchanger 13 and the cross flow fan 12) when the cross flow fan 12 is enlarged, the amount of air blown out from the air 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 decreases, the air conditioner 1 efficiency decreases, and the quality decreases.
As a countermeasure against the static pressure decrease, consider
(A) Increase the area of the suction port 21
(B) Reducing the area of the blow-out port 22
(C) The larger area forms the space around the heat exchanger 13.
(A) In the countermeasure of (2), there is a limit in taking account of the product size of the air conditioner 1, that is, the size of the air conditioner is directly related to the size increase. (B) In the countermeasure of (2), the air volume blown out from the air outlet 22 is reduced, so that it is difficult to effectively cope with the problem. Here, the inventors of the present invention focused on the countermeasure of (C), and repeated the study to solve these problems.
As a result of the study, the inventors of the present invention found that, with respect to the diameter of the cross flow fan 12, when the distance between the heat exchanger 13 and the cross flow fan 12 is set in a fixed range, it is possible to suppress deterioration of static pressure and to 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 on the wider side of the space. If the loss due to pressure change is improved, the air volume increases and the power consumption decreases. From this, it was found that an appropriate distance between the heat exchanger 13 and the cross flow fan 12 is the above formula (1).
[ confirmation of Effect ]
Fig. 4 is a graph showing a relationship between the rotational speed of the cross flow fan 12 and the blowout air volume when the diameter of the cross flow fan 12 is fixed and the distance between the cross flow fan 12 and the heat exchanger 13 is changed in the air conditioner 1. Fig. 5 is a graph showing a relationship between power consumption and air volume blown out from the air conditioner 1 when the distance between the cross flow fan 12 and the heat exchanger 13 is changed by fixing the diameter of the cross flow fan 12 in the air conditioner 1.
Here, in the air conditioner 1, when L/(D/2) is changed with D being 125mm, the results of investigation of the relationship between the rotation speed of the cross flow fan 12 and the air volume blown out and the relationship between the power consumption and the air volume blown out will be described. In fig. 4 and 5, L/(D/2) is set to (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, when L/(D/2) is greater than 0.45 ((a) to (e)), it can be seen that the air volume is significantly greater than the same rotational speed, as compared with the case where L is less than 0.45 ((f) to (h)). From the results of fig. 5, when L/(D/2) is greater than 0.42 ((a) to (f)), the power consumption can be significantly reduced from the same air volume, compared with the case where L/(g) to (h)) is less than 0.42. Therefore, as can be seen from the results of FIGS. 4 and 5, L/(D/2) > 0.45 is preferable.
[ 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 is not repeated.
(relationship between distance La and distance Lb)
Fig. 6 is a schematic diagram showing an internal structure of the air conditioner 2 according to 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 constituent unit 31 and the outer peripheral surface of the cross flow fan 12 and the distance Lb between the inner surface of the rear constituent unit 32 and the outer peripheral surface of the cross flow fan 12 is defined as La > Lb.
In order to prevent a decrease in the blown air volume, the relationship between the distance La and the distance Lb is preferably set to be la=distance Lb as in the air conditioner 1. However, the relationship between the distance La and the distance Lb may be set to be that La > Lb. In the air conditioner 2, the front side is easier to ensure a space for disposing the heat exchanger 13 than the rear side in terms of construction. Therefore, if the distance La > the distance Lb, it is easy to ensure that the average value L of the distance La and the distance Lb satisfies L/(D/2) > 0.45 of the formula (1).
(air volume in the case of distance La > distance Lb)
Fig. 7 is a graph showing a change in the blown-out air volume when the distance Lb between the cross flow fan 12 and the rear structure portion 32 is changed in the air conditioner 2 shown in fig. 6.
Here, the change in the blown-out air volume when the distance La between the cross flow fan 12 and the front structure portion 31 is fixed and the distance Lb between the cross flow fan 12 and the rear structure portion 32 is changed is examined. Further, the rotation speed of the cross flow fan 12 is fixed. In fig. 7, the horizontal axis represents the ratio (Lb/La) of the distance Lb to the distance La, and the vertical axis represents the air volume ratio for the case of the distance la=the distance Lb.
As is clear from fig. 7, in the blown-out air volume, lb/La decreases from around 90%, and the decrease range from around 80% to around Lb/La decreases, and when Lb/La is smaller than 80%, the decrease range increases. From this result, it is preferable that Lb/La is 90% or more, but the design target is more than 80% in consideration of the air volume reduction range and the space efficiency. As a result, lb/La is preferably 1 > Lb/La.gtoreq.0.8.
[ third embodiment ]
The following description is directed 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 is not repeated.
Fig. 8 is a schematic diagram showing the internal structure of the air conditioner 3 according to the present embodiment when viewed from the side. As shown in fig. 8, the air conditioner 3 is configured such that the heat exchanger 13 has a front configuration portion 31 and a rear configuration portion 32, and the front additional portion 33 is not provided. The heat exchanger 13 preferably has the front attachment portion 33 in terms of performance, but may have a configuration for a low-cost type heat exchanger 13, for example.
[ fourth embodiment ]
The following description is directed 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 is not repeated.
Fig. 9 is an explanatory view of an angle formed by a chord line 42 of a blade 41 of the cross flow fan 12 and a line 43 connecting a center O of the cross flow fan 12 and an outer edge portion of the blade 41, which is provided in the air conditioner according to the 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 both lines is 26 ° or more and θ is or more than 22 °.
In general, the cross flow fan 12 has an optimum flow rate efficiency for suction and blowing when the angle θ is about 26 °. On the other hand, from the viewpoint of preventing the static pressure from decreasing, the angle θ is preferably large, and for example, it is preferably set to 28 ° to 30 °. However, in this case, the flow rate efficiency is deteriorated.
On the other hand, in the air conditioner 1, since the decrease in static pressure is suppressed as described above, by setting the angle θ to 26 ° or more and θ to 22 ° or more, it is possible to prevent the decrease in the blown-out air volume while suppressing the decrease in static pressure. In this respect, the same applies to the air conditioners 2 to 3.
(summary)
An air conditioner according to aspect 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-like shape in an inclined state in which the front component and the rear component are inclined in opposite directions; a fan that is a cross-flow fan disposed between the front constituent portion and the rear constituent portion; and a casing that accommodates the heat exchanger and the fan, and has a suction port at an upper position of the heat exchanger and a discharge port at a lower position of the fan, wherein the distance between an inner surface of the front structure and an outer peripheral surface of the fan is La, the distance between an inner surface of the rear structure and the outer peripheral surface of the fan is Lb, an average value of the distance La and the distance Lb is L, D is 125mm, and 0.60 is L/(D/2) is 0.45 or more, when the diameter of the fan is D.
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 or more.
In the air conditioner according to aspect 4 of the present invention, 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 may be 26 ° or more and equal to or more than 22 °.
The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the claims, and embodiments in which the technical means disclosed in the different embodiments are appropriately combined are also included in the technical scope of the present invention. Further, new features can be formed by combining the technical means disclosed in the respective embodiments.
Claims (2)
1. An air conditioner is provided with:
a heat exchanger having a front configuration portion and a rear configuration portion, the front configuration portion and the rear configuration portion being arranged so as to form a mountain shape in an inclined state in which the front configuration portion and the rear configuration portion are inclined in opposite directions;
a fan that is a cross-flow fan disposed between the front constituent portion and the rear constituent portion;
a housing that houses the heat exchanger and the fan, has a suction port at an upper position of the heat exchanger, has a blow-out port at a lower position of the fan,
the air conditioner is characterized in that,
assuming that a distance between an inner surface of the front constituent and an outer circumferential surface of the fan is La, a distance between an inner surface of the rear constituent and an outer circumferential surface of the fan is Lb, an average value 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 is not less than L/(D/2) is not less than 0.48;
the relation between the distance La and the distance Lb is 1-0.8.
2. The air conditioner according to claim 1, wherein,
an angle θ formed by a line connecting a center of the fan and an outer edge portion of a blade of the fan and a chord line of the blade of the fan is 26 ° or more than or equal to 22 °.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-106310 | 2019-06-06 | ||
| JP2019106310A JP7329969B2 (en) | 2019-06-06 | 2019-06-06 | air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112050296A CN112050296A (en) | 2020-12-08 |
| CN112050296B true 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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| 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 |
|---|---|
| JP2020200969A (en) | 2020-12-17 |
| JP7329969B2 (en) | 2023-08-21 |
| CN112050296A (en) | 2020-12-08 |
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