Air-conditioned space generating system
Patent Information
- Application Number
- CN202522449915.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-11-20
- Filing Date
- 2025-11-19
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-19
AI Technical Summary
[0013]根据本实用新型,能够在室外的环境或室内的开放空间等生成空气调节空间。
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Figure CN224905097U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an air conditioning space generation system. Background Technology
[0002] In order to effectively provide cooling and heating to various work areas in the factory, indoor units and human detection sensors are installed in each work area. When the presence of a person is detected by the human detection sensor, the indoor unit is activated in the detection sequence (for example, Patent Document 1).
[0003] Existing technical documents
[0004] Patent documents
[0005] Patent Document 1: Japanese Patent Application Publication No. 2008-175507 Utility Model Content
[0006] Problems to be solved by the utility model
[0007] When an air conditioner is running, air is blown out from it, so you can feel the air near the air conditioner. However, simply blowing air out of an air conditioner cannot create an air-conditioned space in an open area.
[0008] This utility model was developed to solve the above-mentioned problems. Its purpose is to provide a technology for generating air-conditioned spaces in outdoor environments or indoor open spaces.
[0009] Technical solutions for solving the problem
[0010] To address the aforementioned problems, one aspect of this utility model provides an air-conditioned space generation system, comprising: an air conditioner (air conditioning unit) capable of cooling operation; a hollow first housing housing the air conditioner; a hollow second housing connected to the first housing; a protruding plate disposed on the upper side of the second housing and protruding towards the front; and an extension plate extending downward from the front end of the protruding plate. The internal space of the first housing is connected to the internal space of the second housing. A cooling outlet is provided on the front side of the second housing, through which air blown from the air conditioner is directed forward. An intake port for drawing in external air is provided below the cooling outlet on the first housing. The air blown from the cooling outlet travels forward along the protruding plate and then downward along the extension plate. Given that the distance from the protruding plate to the upper end of the cooling outlet is h1, and the length from the upper end to the lower end of the cooling outlet is h2, h1 < h2.
[0011] Furthermore, any combination of the above-mentioned constituent elements and the expression of this utility model can be transformed into methods, devices, systems, recording media, computer programs, etc., and these can also be used as ways of presenting this utility model.
[0012] Utility Model Effect
[0013] According to this utility model, an air-conditioned space can be generated in outdoor environments or indoor open spaces. Attached Figure Description
[0014] Figure 1 This is a perspective view showing the appearance of the air-conditioned space generation system of this embodiment.
[0015] Figure 2 It means Figure 1 A three-dimensional view of the cross-section of the air conditioning space generation system.
[0016] Figure 3 It means Figure 1 A three-dimensional view of the cross-section of the air conditioning space generation system.
[0017] Figure 4 It means Figure 1 A three-dimensional view of the cross-section of the air conditioning space generation system.
[0018] Figure 5 It means Figure 1 A three-dimensional view of the cross-section of the air conditioning space generation system.
[0019] Figure 6 It means Figure 1 A three-dimensional view of the cross-section of the air conditioning space generation system.
[0020] Figure 7 This is a three-dimensional view showing a cross-section of the modified air conditioning space generation system.
[0021] Figure 8 It means Figure 1 A three-dimensional view of the cross-section of the air conditioning space generation system.
[0022] Figure 9 It means Figure 1 A three-dimensional view of the cross-section of the air conditioning space generation system. Detailed Implementation
[0023] The embodiments described below represent preferred examples of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, their arrangement and connection methods, as well as the steps (processes) and their order shown in the following embodiments are examples and are not intended to limit the present invention. Therefore, constituent elements not described in the independent claims representing the highest-level concept of the present invention are described as arbitrary constituent elements in the following embodiments. Furthermore, in the figures, identical structures are labeled with the same reference numerals, and repeated descriptions are omitted or simplified.
[0024] Hereinafter, this embodiment will be described in the following order: (1) appearance of air conditioning space generation system 1, (2) cooling operation of air conditioning space generation system 1, (3) heating operation of air conditioning space generation system 1, (4) modified example, and (5) dimensions of air conditioning space generation system 1.
[0025] (1) Appearance of the air conditioning space generation system 1
[0026] Figure 1 This is a perspective view showing the appearance of an air-conditioned space generation system 1. The air-conditioned space generation system 1 includes a back wall 3, a deflector plate 4, chairs 6, an air conditioning unit (air conditioning unit) 7, and a base 8. The back wall 3 is a rectangular plate. One or more chairs 6 are arranged in the space in front of the back wall 3, and the air conditioning unit 7 is arranged behind the chairs 6 and in front of the back wall 3. The base 8 is provided below the chairs 6 and below the air conditioning unit 7. The deflector plate 4 is further provided on the upper side of the back wall 3. The deflector plate 4, the air conditioning unit 7, and the base 8 form an air-conditioned space (hereinafter referred to as "air-conditioned space") in the space in front of the back wall 3. Here, air conditioning includes at least one of cooling and heating.
[0027] (2) Cooling operation of air conditioning space generation system 1
[0028] Figure 2 This is a three-dimensional view showing a cross-section of the air conditioning space generation system 1. Figure 1 A-A' sectional view. Figure 3 This is a three-dimensional view showing a cross-section of the air conditioning space generation system 1. Figure 1 The B-B' sectional view. Figure 4 This is a three-dimensional view showing a cross-section of the air conditioning space generation system 1. Figure 1 The C-C' sectional view.
[0029] In the air conditioning space generation system 1, a second housing 46, a first housing 40, and a third housing 48 are arranged sequentially from top to bottom. Furthermore, the first housing 40 has a central housing 42 in the center, a first side housing 44a on the left side of the central housing 42, and a second side housing 44b on the right side of the central housing 42. The first side housing 44a and the second side housing 44b are collectively referred to as side housings 44. Both the central housing 42 and the side housings 44 have a hollow, box-like shape. The lower part of the third housing 48 is the aforementioned base 8, which protrudes forward. The third housing 48 is also hollow.
[0030] An air conditioner 200 is housed inside the central casing 42. The air conditioner 200 has a box-shaped main body 200a and is capable of performing both cooling and heating operations. An air conditioning outlet 200b is disposed on the upper front side of the main body 200a for blowing out air that has been conditioned in the air conditioner 200, and air conditioning inlets 200c are disposed on both sides of the main body 200a for drawing in air that is used for conditioned air in the air conditioner 200.
[0031] A left partition 23a is sandwiched between the left side of the central housing 42 and the left side of the air conditioner 200, and a right partition 23b is sandwiched between the right side of the central housing 42 and the right side of the air conditioner 200. Furthermore, through holes extending in the left and right directions are provided in a portion of each of the left and right partitions 23a and 23b, exposing the air conditioner intake 200c through the through holes in each of the left and right partitions 23a and 23b. With this structure, the space communicating with the air conditioner outlet 200b (hereinafter referred to as "outlet space 52") and the two spaces communicating with the air conditioner intake 200c (hereinafter referred to as "intake spaces 54") within the internal space of the central housing 42 are separated. That is, the internal space of the central housing 42 is divided into the outlet space 52 and two intake spaces 54.
[0032] The central housing 42 is connected to the second housing 46, and the air outlet 52 of the central housing 42 communicates with the internal space 60 of the second housing 46 via the upper opening 31. Additionally, the central housing 42 is connected to the third housing 48, and the air outlet 52 of the central housing 42 communicates with the internal space 62 of the third housing 48 via the lower opening 32. The upper opening 31 is located between the air outlet 52 and the internal space 60 of the second housing, and the lower opening 32 is located between the air outlet 52 and the internal space 62 of the third housing. When the air conditioner 200 is in cooling operation, the lower opening 32 is closed by the lower panel 22. The lower panel 22 can be installed or removed manually by the user or automatically.
[0033] A cooling outlet 12 is provided on the front side of the second housing 46, through which air blown from the air conditioner 200 is directed forward. The cooling outlet 12 may include, for example, a central cooling outlet 12a, a left cooling outlet 12b, and a right cooling outlet 12c. The central cooling outlet 12a is located on the upper side of the central housing 42, the left cooling outlet 12b is located on the upper side of the first side housing 44a, and the right cooling outlet 12c is located on the upper side of the second side housing 44b. Alternatively, the left cooling outlet 12b and the right cooling outlet 12c may be provided, omitting the central cooling outlet 12a.
[0034] The deflector plate 4 includes a protruding plate 4a and an extension plate 4b. The protruding plate 4a is disposed on the upper side of the second housing 46 and protrudes forward. The extension plate 4b bends from the front end of the protruding plate 4a and extends downward. Alternatively, the extension plate 4b may extend downward without bending from the front end of the protruding plate 4a.
[0035] The transverse housing 44 is not connected to the second housing 46 and is disposed on the transverse side of the central housing 42. The internal space 56a of the first transverse housing 44a communicates with the left-side intake space 54 (not shown), which is connected to the left-side air conditioning intake 200c. The left-side intake space 54 (not shown) is an intake space 54 formed by the left-side partition 23a. The internal space 56b of the second transverse housing 44b communicates with the right-side intake space 54, which is connected to the right-side air conditioning intake 200c. The right-side intake space 54 is an intake space 54 formed by the right-side partition 23b.
[0036] A left-side air intake 13a is provided on the front side of the first side housing 44a for drawing in air from the outside. Similarly, a right-side air intake 13b is provided on the front side of the second side housing 44b. No intake is provided on the central housing 42.
[0037] The following describes the airflow in the air conditioning space generation system 1 of this structure. When the air conditioner 200 is in cooling operation, it blows cooled air from the air conditioning outlet 200b into the outlet space 52. The lower opening 32 between the outlet space 52 and the internal space 62 of the third housing is blocked by the lower plate 22. Therefore, the air blown from the air conditioning outlet 200b, as a cooling airflow 303a, enters the second housing 46 from the outlet space 52 through the upper opening 31. The cooling airflow 303a, as a cooling airflow 301, is blown out from the cooling outlet 12. The cooling airflow 301 travels forward along the protruding plate 4a and then downward along the extension plate 4b.
[0038] The cooling airflow 301 travels downwards, and a portion of the cooling airflow 301 is directed towards the intake 13. A portion of the cooling airflow 301 is drawn from the intake 13 into the transverse housing interior space 56, and from the transverse housing interior space 56 through the intake space 54, it is drawn into the air conditioning intake 200c. The air conditioner 200 cools the air drawn in from the air conditioning intake 200c. On the other hand, the remaining cooling airflow 301 that is not drawn into the intake 13 has a lower temperature than the surrounding outside air temperature, and therefore travels directly downwards. As a result, an air-conditioned space is formed around the chair 6.
[0039] (3) Heating operation performed by the air conditioning space generation system 1
[0040] Figure 5 This is a three-dimensional view showing a cross-section of the air conditioning space generation system 1. Figure 1 A-A' sectional view. Figure 6 This is a three-dimensional view showing a cross-section of the air conditioning space generation system 1. Figure 1 The C-C' sectional view. Figure 5 and Figure 2 Similarly, Figure 6 and Figure 4 Similarly, it is expressed.
[0041] When the air conditioner 200 is in heating operation, the upper opening 31 is blocked by the upper panel 21. The upper panel 21 can be installed or removed manually by the user or automatically. On the other hand, the lower panel 22 is not installed at the lower opening 32. The lower part of the third housing 48 protrudes forward as the base 8. A bottom surface 14 is provided at the bottom of the third housing 48. A heating air outlet 11 is provided at the front of the base 8, and the heating air outlet 11 blows the air blown from the air conditioner 200 forward. In addition, the chair 6 mentioned above is disposed between the intake 13 and the heating air outlet 11, and at the front of the first housing 40.
[0042] The following describes the airflow in the air conditioning space generation system 1 of this structure. When the air conditioner 200 is in heating operation, it blows heated air from the air conditioning outlet 200b into the outlet space 52. The upper opening 31 between the outlet space 52 and the inner space 60 of the second housing is blocked by the upper side plate 21. Therefore, the air blown from the air conditioning outlet 200b, as a heating airflow 303b, enters the third housing 48 from the outlet space 52 through the lower opening 32. The heating airflow 303b, as a heating airflow 302, is blown out from the heating outlet 11. The heating airflow 302 travels forward and, being at a temperature higher than the surrounding external air temperature, travels upward.
[0043] A portion of the heating airflow 302 is directed towards the intake 13. A portion of the heating airflow 302 is drawn from the intake 13 into the transverse housing interior space 56, and from there through the intake space 54, it is drawn into the air conditioning intake 200c. The air conditioner 200 heats the air drawn in from the air conditioning intake 200c. On the other hand, the remaining heating airflow 302 that is not drawn into the intake 13 travels directly upwards. As a result, an air-conditioned space is formed around the chair 6.
[0044] (4) Variations
[0045] Next, a modified example will be described, focusing on the differences from the conventional one. Conventionally, air is supplied only by the internal fan of the air conditioner 200. In the modified example, a new fan is added to the conventional structure to increase the airflow. Figure 7 This is a three-dimensional view showing a cross-section of the modified air conditioning space generation system 1. This is consistent with... Figure 4 Similarly, the air-conditioned space generation system 1 includes a first air supply fan 400a and a second air supply fan 400b, collectively referred to as air supply fans 400, and a first channel 410a and a second channel 410b, collectively referred to as channel 410. The first air supply fan 400a includes a first air supply fan inlet 402a and a first air supply fan outlet 404a, and the second air supply fan 400b includes a second air supply fan inlet 402b and a second air supply fan outlet 404b. The first air supply fan inlet 402a and the second air supply fan inlet 402b are collectively referred to as air supply fan inlet 402, and the first air supply fan outlet 404a and the second air supply fan outlet 404b are collectively referred to as air supply fan outlet 404.
[0046] A first blower 400a is disposed within the first transverse housing 44a. The first blower inlet 402a of the first blower 400a faces forward, opposite to the left-side inlet 13a (not shown) of the first transverse housing 44a. The first blower outlet 404a of the first blower 400a faces right, opposite to the left-side partition 23a. The first blower outlet 404a and the through-hole of the left-side partition 23a are connected by a tubular first channel 410a. The first blower 400a draws in airflow 304 from the first blower inlet 402a and blows the airflow 304 out from the first blower outlet 404a through the first channel 410a into the intake space 54 of the left-side partition 23a. The airflow 304 is drawn in from the air conditioning intake 200c on the left-side partition 23a side of the air conditioner 200.
[0047] A second blower 400b is disposed within the second side housing 44b. The second blower inlet 402b of the second blower 400b faces forward, opposite the right side inlet 13b (not shown) of the second side housing 44b. The second blower outlet 404b of the second blower 400b faces leftward, opposite the right side partition 23b. The through-holes of the second blower outlet 404b and the right side partition 23b are connected by a tubular second channel 410b. The second blower 400b draws in airflow 304 from the second blower inlet 402b and blows the airflow 304 out from the second blower outlet 404b through the second channel 410b into the intake space 54 of the right side partition 23b. The airflow 304 is drawn in from the air conditioning intake 200c on the right side partition 23b side of the air conditioner 200.
[0048] (5) Dimensions of the air conditioning space generation system 1
[0049] Figure 8 It is a three-dimensional view showing a cross-section of the air conditioning space generation system 1. Figure 9 This is a three-dimensional view showing a cross-section of the air conditioning space generation system 1. These are... Figure 2 A magnified partial 3D view of the vicinity of the central cooling outlet 12a (cooling outlet 12).
[0050] The distance from the protruding plate 4a to the upper end 500 of the cooling outlet 12 is defined as "h1", and the length from the upper end 500 to the lower end 502 of the cooling outlet 12 is defined as "h2". h2 can also be referred to as the length in the height direction of the cooling outlet 12. Based on these definitions, in this embodiment, it is assumed that h1 < h2. Preferably, it is assumed that 2 × h1 < h2. This is to ensure that the cooling airflow 301 (…) blown out from the cooling outlet 12… Figure 2 ) Along the protruding plate 4a.
[0051] h1 is 50 mm or less, and more preferably 30 mm or less. This is also to ensure that the cooling airflow 301 (blown from the cooling outlet 12) Figure 2 Along the protruding plate 4a. Furthermore, h2 is 20mm to 200mm, more preferably 100mm or less. This is because increasing the wind speed makes it easier for the cooling airflow 301 ( Figure 2 Along the protruding plate 4a, thus enhancing the cooling sensation at the location of the person's face.
[0052] The length from the upper end 510 to the lower end 512 of the extension plate 4b is defined as "h3". Based on these definitions, in this embodiment, it is set as h1 + h2 < h3. Preferably, it is set as 1.5 × (h1 + h2) < h3. This is to change the cooling airflow 301 along the protruding plate 4a downwards. As a result, the cooling airflow 301 can easily blow onto the face of the person sitting in the chair 6. h3 is 50 mm to 500 mm, preferably 100 to 300 mm. In addition, the length from the extension plate 4b to the cooling outlet 12 is defined as "d", and d is 200 mm to 600 mm, preferably 300 to 500 mm. Through these, it is also easy for the cooling airflow 301 to blow onto the face of the person sitting in the chair 6.
[0053] According to this embodiment, because the air blown from the cooling outlet 12 travels forward along the protruding plate 4a and then downward along the extension plate 4b, an air-conditioned space can be generated in an outdoor environment or an open indoor space. Furthermore, because the air blown from the cooling outlet 12 travels forward along the protruding plate 4a and then downward along the extension plate 4b, the distance between the position of the cooled air and the air-conditioned space can be shortened. Moreover, because the distance between the position of the cooled air and the air-conditioned space is shortened, air conditioning zoning based on cooling air can be effectively realized.
[0054] Furthermore, because the internal space 50 of the first housing is divided into an exhaust space 52 and an intake space 54, short circuits can be suppressed. Also, because the intake port 13 is not provided on the central housing 42 but is provided on the side housing 44, air blown from the cooling outlet 12 can be easily delivered downwards. Furthermore, because the heating outlet 11 is provided on the third housing 48, heating-based air conditioning zoning can be achieved. Additionally, because the heating outlet 11 is provided on the third housing 48, the upper part of the heating outlet 11 can be zoned in a way that it is surrounded by heating.
[0055] Furthermore, because the intake 13 is located above the heating outlet 11, it allows for zoning where the heating surrounds the person. Also, because the intake 13 is located between the heating outlet 11 and the cooling outlet 12, the distance from the heating outlet 11 to the intake 13 is shortened. Furthermore, by shortening the distance from the heating outlet 11 to the intake 13, effective zoning is achieved. Furthermore, because the intake 13 is located between the heating outlet 11 and the cooling outlet 12, the distance from the cooling outlet 12 to the intake 13 is shortened. Furthermore, by shortening the distance from the cooling outlet 12 to the intake 13, effective zoning is achieved.
[0056] Furthermore, because the intake 13 is not provided on the central housing 42, but on the side housing 44, the passage of air blown out from the heating outlet 11 is not obstructed. Additionally, because the opening is closed by the lower side plate 22 or the upper side plate 21, cooling and heating operations can be reliably switched. Furthermore, because the chair 6 is positioned between the intake 13 and the heating outlet 11, and at the front of the first housing 40, air conditioning zones can be effectively created around the chair 6.
[0057] Furthermore, because h1 < h2, the cooling airflow 301 blown from the cooling outlet 12 can be directed along the protruding plate 4a. Also, because the cooling airflow 301 blown from the cooling outlet 12 is directed along the protruding plate 4a, an air-conditioned space can be created in outdoor environments or indoor open spaces. Furthermore, because h1 + h2 < h3, the cooling airflow 301 along the protruding plate 4a can be redirected downwards.
[0058] The following is a summary of one aspect of this utility model.
[0059] (Project 1)
[0060] An air-conditioned space generation system (1) includes:
[0061] An air conditioner (200) capable of providing cooling.
[0062] A hollow first housing (40) for housing the air conditioner (200);
[0063] A hollow second housing (46) connected to the first housing (40);
[0064] A protruding plate (4a) disposed on the upper side of the second housing (46) and protruding towards the front; and
[0065] An extension plate (4b) extends downward from the front end of the protruding plate (4a), wherein...
[0066] The internal space of the first housing (40) is connected to the internal space of the second housing (46).
[0067] A cooling outlet (12) is provided on the front side of the second housing (46), and the cooling outlet (12) blows the air blown from the air conditioner (200) towards the front.
[0068] An intake port (13) for drawing in air from the outside is provided on the first housing (40) below the cooling outlet (12).
[0069] The air blown from the cooling outlet (12) travels forward along the protruding plate (4a) and then downward along the extension plate (4b).
[0070] When the distance from the protruding plate (4a) to the upper end (500) of the cooling outlet (12) is set as h1, and the length of the cooling outlet (12) from the upper end (500) to the lower end (502) is set as h2, h1 < h2 is satisfied.
[0071] (Project 2)
[0072] According to the air conditioning space generation system (1) described in Project 1, when the length from the upper end (510) to the lower end (512) of the extension plate (4b) is set to h3, h1 + h2 < h3 is satisfied.
[0073] The present invention has been described above based on embodiments. Those skilled in the art should understand that these embodiments are examples, and the combinations of these constituent elements or processing techniques can have various modifications; furthermore, such modifications are also included within the scope of the present invention.
[0074] In this embodiment, the air conditioner 200 of the air-conditioned space generation system 1 performs both heating and cooling operations. However, the present invention is not limited to this; for example, the air conditioner 200 may also perform only either heating or cooling operations. When the air conditioner 200 performs only heating operation, the cooling air outlet 12 and the upper opening 31 may be omitted; when the air conditioner 200 performs only cooling operation, the heating air outlet 11 and the lower opening 32 may be omitted. According to this modification, the structure of the air-conditioned space generation system 1 can be simplified.
[0075] The air-conditioned space generation system 1 in this embodiment includes a chair 6. However, the present invention is not limited to this; for example, the chair 6 may be omitted. According to this modification, the structure of the air-conditioned space generation system 1 can be simplified.
[0076] Alternatively, the first housing 40 and the second housing 46 can be combined and considered as a single housing.
[0077] Furthermore, although no intake port is provided on the central housing 42, the air conditioning space generation system 1 can still be realized even if the structure is configured such that an intake port is provided on the central housing 42. In this case, the intake port provided on the central housing 42 is connected to the left intake port 13a and / or the right intake port 13b. Alternatively, by providing a partition or the like in the blowout space 52, the structure can be configured such that the intake port provided on the central housing 42 is not connected to the blowout space 52.
[0078] Explanation of reference numerals in the attached figures
[0079] 1. Air-conditioned space generation system; 3. Back wall; 4. Deflector plate; 4a. Protruding plate; 4b. Extension plate; 6. Chair; 7. Air conditioning unit; 8. Base; 11. Heating outlet; 12. Cooling outlet; 12a. Central cooling outlet; 12b. Left cooling outlet; 12c. Right cooling outlet; 13. Inlet; 13a. Left intake; 13b. Right intake; 14. Bottom surface; 21. Upper side plate; 22. Lower side plate; 23a. Left partition; 23b. Right partition; 31. Upper opening; 32. Lower opening; 40. First shell; 42. Central shell; 44. Lateral shell; 46. Second shell; 48. Third shell; 50. Inside the first shell. 52. Exhaust space, 54. Intake space, 56. Internal space of the transverse shell, 60. Internal space of the second shell, 62. Internal space of the third shell, 200. Air conditioner, 200a. Main body, 200b. Air conditioner outlet, 200c. Air conditioner intake, 301. Cooling airflow, 302. Heating airflow, 303a. Cooling exhaust airflow, 303b. Heating exhaust airflow, 304. Intake airflow, 400. Blower, 402. Blower intake, 404. Blower outlet, 410. Channel, 500. Upper end, 502. Lower end, 510. Upper end, 512. Lower end.
Claims
1. An air-conditioned space generation system, characterized in that, include: An air conditioner capable of providing cooling; A hollow first housing for accommodating the air conditioner; A hollow second housing connected to the first housing; A protruding plate disposed on the upper side of the second housing and protruding forward; and An extension plate extending downward from the front end of the protruding plate. The internal space of the first housing is connected to the internal space of the second housing. A cooling outlet is provided on the front side of the second housing, which directs the air blown out of the air conditioner to the front. An intake port for drawing in air from the outside is provided on the first housing below the cooling outlet. The air blown out from the cooling outlet first travels forward along the protruding plate, and then downward along the extension plate. When the distance from the protruding plate to the upper end of the cooling outlet is set as h1 and the length from the upper end to the lower end of the cooling outlet is set as h2, h1 < h2 is satisfied.
2. The air-conditioned space generation system according to claim 1, characterized in that, If the length from the upper end to the lower end of the extension plate is set to h3, then h1 + h2 < h3.
Citation Information
Patent Citations
Spot air conditioning equipment in factory
JP2008175507A