JP2020016394A - Air conditioner - Google Patents

Abstract

To provide an air conditioner that can readily adjust static pressure even after installation.SOLUTION: An air conditioner includes: an indoor unit body 1; and a box 3 installed by being fixed to the indoor unit body 1 on an outside of the indoor unit body 1. The box 3 includes: a first ventilation port 35 connected to an air suction port 15 of the indoor unit body 1; and a second ventilation port 36 communicated to the first ventilation port 35. The box 3 further includes a plate-like static pressure adjustment member 4 that is inserted between the first ventilation port 35 and the second ventilation port 36 inside the box 3 so as to be capable of being removed and inserted from the outside of the box 3.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an air conditioner.

  At the site where the duct type indoor unit is installed, if the external static pressure in the actual installation state is lower than the designed value, or if there is almost no external static pressure itself due to ductless construction without using ducts There is. In this case, while the blower motor operates at a rotational speed corresponding to the design value of the external static pressure, the air volume is actually excessive because the external static pressure in the installed state is low. Therefore, not only the efficiency of the blower motor becomes poor, but also the operation noise becomes unnecessarily large, which may lead to a complaint.

  Patent Literature 1 discloses an air conditioner in which a shielding plate for adjusting the air volume is attached between a filter and an evaporator at an air suction port of a high static pressure type indoor unit of a separate type air conditioner. Thus, an appropriate air volume is obtained regardless of the magnitude of the ventilation resistance of the duct connected to the indoor unit.

JP-A-7-280333

  In the air conditioner described in Patent Literature 1, the indoor unit has a space for attaching a shielding plate for adjusting the air volume inside the indoor unit. Since it is difficult to attach the air volume adjustment shielding plate after installing the indoor unit, such as removing the panels that make up the housing, the air volume adjustment shielding plate must be installed inside before installing the indoor unit. Is performed. For this reason, when the static pressure assumed in advance on site does not match the actual static pressure, or when the contents of duct construction are changed in the middle, etc., it is necessary to adjust the static pressure after installing the air conditioner There is a need. In this case, the cost and time required for the construction are greatly lost.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an air conditioner capable of easily adjusting a static pressure even after installation.

  An air conditioner according to the present invention for solving the above-mentioned problems is provided with an indoor unit main body including a heat exchanger and a blower, and fixed to the indoor unit main body outside the indoor unit main body. And a box. The box has a first ventilation port connected to an air suction port or an air blowing port of the indoor unit main body, and a second ventilation port communicating with the first ventilation port. The box may further include a plate-shaped static pressure adjusting member for adjusting a static pressure inserted between the first ventilation port and the second ventilation port in the box so that the static pressure can be inserted and removed from outside the box. Have.

  ADVANTAGE OF THE INVENTION According to this invention, the air conditioner which can adjust a static pressure easily even after installation can be provided.

It is a figure showing appearance composition of an air conditioner concerning a 1st embodiment of the present invention. FIG. 2 is a bottom cross-sectional view of the vicinity of the indoor unit main body shown in FIG. FIG. 2 is an enlarged perspective view around a box shown in FIG. 1. FIG. 9 is a perspective view showing another static pressure adjusting member having a different static pressure adjusting amount. It is a perspective view showing still another static pressure adjustment member from which a static pressure adjustment amount differs. It is a block diagram regarding control of the blower in an air conditioner. It is a perspective view which shows the filter with the filter main body for foreign substance capture of the same area as the opening part of a static pressure adjustment member with a static pressure adjustment member. FIG. 13 is a perspective view showing a static pressure adjusting member according to another modification. It is a perspective view which shows the static-pressure adjustment member which concerns on another modification. It is a figure showing the appearance composition of the air conditioner concerning a 2nd embodiment of the present invention.

An embodiment of the present invention will be described in detail with reference to the drawings as appropriate.
In each of the drawings shown below, common constituent elements and similar constituent elements are denoted by the same reference numerals, and redundant description thereof will be omitted as appropriate.

(1st Embodiment)
FIG. 1 is a diagram illustrating an external configuration of an air conditioner 100 according to the first embodiment of the present invention. FIG. 2 is a bottom sectional view of the vicinity of the indoor unit main body 1 shown in FIG.
In the following description, for convenience of description, the terms “front and rear”, “left and right”, and “up and down” are based on the directions shown in FIGS. 1 and 2.
Although FIG. 1 illustrates the ceiling-mounted (ceiling-mounted) air conditioner 100 as an example, it is not intended to limit the type of the air conditioner to which the present invention is applied.

  As shown in FIG. 1, an air conditioner 100 according to the present embodiment includes an indoor unit main body 1 suspended and arranged in a ceiling space between a ceiling 7 and a ceiling plate 8 of a building. . Further, the air conditioner 100 includes a blow grill 61, a blow duct 62, a box 3, a suction duct 63, a suction grill 64, and the like.

  The indoor unit main body 1 includes a housing 11 forming an outer frame of the indoor unit main body 1, and a heat exchanger 21 and a blower 22 are housed in the housing 11. That is, the indoor unit main body 1 incorporates the heat exchanger 21 and the blower 22. The housing 11 includes four side plates 12 (a front side plate 12F, a right side plate 12R, a left side plate 12L (see FIG. 2), and a rear side plate 12B), a top plate 13, and a bottom plate 14, which are arranged to face each other. It is configured.

  An air inlet 15 (see FIG. 2) for sucking air into the housing 11 is formed in the rear side plate 12B of the housing 11, and air for blowing air out of the housing 11 is formed in the front side plate 12F. An outlet 16 (see FIG. 2) is formed. The air outlet 16 is connected to the outlet duct 62. Further, a hanging metal member 72 is fixed to the side plate 12 of the housing 11, and the hanging metal member 72 is fixed to a hanging bolt 71 hanging down from the ceiling 7 of the building.

  As shown in FIG. 2, the heat exchanger 21 cools or heats the air passing through the heat exchanger 21 by heat exchange. The blower 22 includes a fan 23, a blower motor 24 that rotationally drives the fan 23, and a fan casing 25 that houses the fan 23. The fan casing 25 has an air inlet 26 for taking in air and an air outlet 27 for blowing out air. Here, a plurality of (three in FIG. 2) fans 23 are used as the blower 22, but the present invention is not limited to this. For example, one or two fans 23 may be used. .

  Inside the housing 11, a partition wall 19 that partitions an upstream space 17 and a downstream space 18 is provided. A blower 22 is arranged in the upstream space 17, and a heat exchanger 21 is arranged in the downstream space 18. The fan casing 25 is provided through the partition wall 19 so that the air outlet 27 faces the downstream space 18.

FIG. 3 is an enlarged perspective view around the box 3 shown in FIG.
As shown in FIGS. 2 and 3, the box 3 is provided outside the indoor unit main body 1 and fixed to the indoor unit main body 1 by, for example, screw fastening means. The box 3 has a casing 31 having a rectangular parallelepiped outer shape. The casing 31 includes four side plates 32 (a front side plate 32F, a right side plate 32R, a left side plate 32L, and a rear side plate 32B), a top plate 33, and a bottom plate 34, which are arranged to face each other.

  In this embodiment, the box 3 has a first ventilation port 35 connected to the air suction port 15 of the indoor unit main body 1, and a second ventilation port 36 communicating with the first ventilation port 35. The first ventilation port 35 is formed in the front side plate 32F, and the second ventilation port 36 is formed in the rear side plate 32B. A ventilation path 37 is formed between the first ventilation port 35 and the second ventilation port 36. The second ventilation port 36 is connected to the suction duct 63.

  The box 3 has a plate-shaped static pressure adjusting member 4 for adjusting the static pressure inserted between the first ventilation port 35 and the second ventilation port 36 inside the box 3 so as to be able to be inserted and removed from outside the box 3. have. In FIG. 2, the illustration of the static pressure adjusting member 4 is omitted.

  In the present embodiment, insertion holes 38 for inserting the static pressure adjustment member 4 into the box 3 are formed in the right side plate 32R and the left side plate 32L, respectively. However, the insertion port 38 may be formed on one of the right side plate 32R and the left side plate 32L, or may be formed on at least one of the top plate 33 and the bottom plate 34.

  The static pressure adjusting member 4 includes a metal plate 41 having an opening 42 through which air can flow, and a rectangular support frame 43 that supports the metal plate 41. However, when the static pressure adjusting member 4 is supported in the casing 31 without rattling, the support frame 43 may be omitted. The static pressure can be adjusted by reducing the effective cross-sectional area of the ventilation path 37 by the metal plate 41 having the opening 42.

  4 and 5 are perspective views showing other static pressure adjusting members 4a and 4b having different static pressure adjusting amounts. The opening 42a of the static pressure adjusting member 4a shown in FIG. 4 has a smaller opening area than the opening 42 of the static pressure adjusting member 4 shown in FIG. The opening 42b of the static pressure adjusting member 4b shown in FIG. 5 has a smaller opening area than the opening 42a of the static pressure adjusting member 4a shown in FIG. Therefore, the use of the static pressure adjustment member 4a shown in FIG. 4 and the use of the static pressure adjustment member 4b shown in FIG. 5 sequentially increase the ventilation resistance rather than the use of the static pressure adjustment member 4 shown in FIG. Static pressure can be increased.

  As illustrated in FIG. 3, the box 3 includes a filter 5 that captures foreign matter in the air inserted between the first ventilation port 35 and the second ventilation port 36 inside the box 3 so as to be able to be inserted and removed from outside the box 3. Have. In FIG. 2, the illustration of the filter 5 is omitted.

  The filter 5 has a filter main body 51 for capturing foreign matter and a rectangular support frame 52 that supports the filter main body 51. Although one type of filter is used as the filter 5 in FIG. 3, for example, two types of filters may be overlapped and used at the same time.

  The box 3 has a cover 39 that opens and closes an insertion port 38 formed in the casing 31. By closing the cover 39, the static pressure adjusting member 4 and the filter 5 can be securely held in the box 3 and air leakage can be further suppressed.

  Returning to FIG. 1, the air outlet duct 62 usually extends from the indoor unit main body 1. One end of the blow-out duct 62 is fitted and connected to an air blow-out opening 16 (see FIG. 2) formed in the front side plate 12F of the indoor unit main body 1, and a blow-out grill 61 is attached to the other end. The blowout grill 61 is installed at an appropriate position on the ceiling plate 8. Due to the rotation of the fan 23 in the indoor unit main body 1, the indoor air is sucked into the indoor unit main body 1, and the air heat exchanged by the heat exchanger 21 is blown into the room from the blow grill 61 through the blow duct 62. .

  Normally, one suction duct 63 is connected via the box 3 to the air suction port 15 (see FIG. 2) formed in the rear side plate 12B of the indoor unit main body 1. A suction grill 64 is fitted to one end of the suction duct 63, and the suction grill 64 is installed at an appropriate position on the ceiling plate 8. Indoor air is taken in from the suction grill 64, passes through the suction duct 63, and is sucked into the indoor unit main body 1 via the box 3. The lower opening of the indoor unit main body 1 is closed by a main body cover 20. In addition, the ceiling plate 8 is provided with an inspection port 81, and the inspection port 81 is closed by an inspection port lid 82.

FIG. 6 is a block diagram related to control of blower 22 in air conditioner 100.
As shown in FIG. 6, the air conditioner 100 includes a control unit 91 that controls each unit such as the blower 22. The power supplied from the power supply 92 is input to the blower motor 24 through the input frequency converter 93. The blower motor 24 is connected to the fan 23 so as to be able to transmit a rotational force, and is controlled by the controller 91.

  An operation unit 95 is connected to the control unit 91. The operation unit 95 gives instructions such as setting of driving conditions, starting and stopping of driving, etc., based on a user operation. Through the operation unit 95, one of the standardly set rotational speeds of the fan 23 (for example, H blast, blast, strong wind, and weak wind in four levels) can be selected and designated. . In addition, the control unit 91 sets the rotation speed of each level to a speed equal to or higher than the standard rotation speed set as a standard in correspondence with each level set as a standard (for example, H blast, H storm, in order). Wind, steep winds, and strong winds).

  When the operation of the air conditioner 100 is started, as shown in FIG. 2, indoor air is sucked into the indoor unit main body 1 via the suction duct 63, the box 3, and the box 3 by a blowing operation by the blower 22. Then, the air sucked into the indoor unit main body 1 is cooled or heated by the heat exchanger 21 and then blown into the room from the air outlet 16 through the blow duct 62.

  Here, by arranging the static pressure adjusting member 4 in the box 3, the ventilation resistance when air passes through the box 3 increases, and the static pressure increases. When the static pressure detected by the pressure sensor 94 is higher than a predetermined value, the control unit 91 switches the rotation speed of the fan 23 from the standard setting to the speed increase setting.

  As described above, the air conditioner 100 according to the present embodiment includes the indoor unit main body 1 and the box 3 provided outside the indoor unit main body 1 and fixed to the indoor unit main body 1. The box 3 has a first ventilation port 35 connected to the air suction port 15 of the indoor unit main body 1, and a second ventilation port 36 communicating with the first ventilation port 35. Further, the box 3 has a plate-shaped static pressure adjusting member 4 inserted between the first ventilation port 35 and the second ventilation port 36 in the box 3 so as to be removable from the outside of the box 3.

According to such a configuration, when the external static pressure at the site is lower than a pre-designed value or in a ductless case, the static pressure can be easily increased by inserting the static pressure adjusting member 4 into the box 3. can do. As a result, it is possible to prevent the air volume from becoming excessive, and it is possible to suppress an unnecessary increase in the operation noise and a deterioration in the efficiency of the blower motor 24. In addition, by adding or changing the static pressure adjusting member 4 after construction at the site, the static pressure adjustment after the installation of the air conditioner 100 is facilitated.
That is, according to the present embodiment, it is possible to provide the air conditioner 100 capable of easily adjusting the static pressure even after installation.

  Further, in the present embodiment, the first ventilation port 35 is connected to the air suction port 15. The box 3 has a filter 5 that captures foreign matter in the air inserted between the first ventilation port 35 and the second ventilation port 36 inside the box 3 so as to be removable from the outside of the box 3. According to such a configuration, a filter box which is often used by being connected to the air suction port 15 of the indoor unit main body 1 is used, and not only the filter 5 but also the static pressure adjusting member 4 is provided in the box. It becomes possible to insert and arrange.

  Further, in the present embodiment, the static pressure adjusting member 4 is arranged on the upstream side of the air flow from the filter 5. In such a configuration, as shown in FIG. 7, the filter 5 a in which a filter main body 51 for capturing foreign matter having the same area as the opening 42 exists in the portion of the filter 5 a corresponding to the opening 42 of the static pressure adjusting member 4. Can be used. In this case, the air that has passed through the opening 42 of the static pressure adjusting member 4 can flow straight and pass through the filter body 51. Therefore, the area occupied by the filter main body 51 in the filter 5a can be reduced. This leads to a reduction in the size of the filter body 51 and a reduction in cost.

  Further, the filter 5a and the static pressure adjusting member 4 arranged on the upstream side of the filter 5a may be fixed and integrally formed. By doing so, the area of the filter main body 51 of the filter 5a and the area of the opening 42 of the static pressure adjusting member 4 match, and it is possible to prevent use in an incorrect combination.

  Further, in the present embodiment, when the static pressure is higher than a predetermined value, a speed increase setting for setting the rotation speed of the fan 23 of the blower 22 to a speed equal to or higher than a standard rotation speed set as a standard is performed. Here, it is conceivable that the installation of the static pressure adjusting member 4 increases the static pressure more than necessary, and as a result, the air volume is reduced and the required performance is not obtained. However, according to the above-described configuration, performance reduction can be prevented by performing the speed increase setting.

  Further, in the present embodiment, the static pressure adjusting member 4 has a metal plate 41 having an opening 42 through which air can flow. According to such a configuration, the area and arrangement of the openings 42 in the static pressure adjusting member 4 can be easily set and implemented. This makes it easier to adjust the aperture ratio and adjusts the flow of air. However, a resin plate may be used instead of the metal plate 41.

FIG. 8 is a perspective view showing a static pressure adjusting member 4c according to another modification. Hereinafter, points different from the above-described embodiment will be mainly described, and description of common points will be omitted.
The static pressure adjusting member 4c shown in FIG. 8 is configured such that the amount of adjustment of the static pressure adjusted by the static pressure adjusting member 4c can be changed. This is different from the above-described embodiment which is fixed.

  As shown in FIG. 8, the static pressure adjusting member 4c includes a metal plate 41 having an opening 42 through which air can flow, and a slide plate 44 capable of shielding a part of the opening 42. The slide plate 44 can be moved and adjusted, for example, in the direction perpendicular to the air flow direction (the left-right direction in FIG. 8) on the upstream side of the opening 42, for example. That is, the effective opening area of the opening 42 through which the air actually passes can be adjusted.

According to such a configuration, the adjustment of the static pressure can be performed more accurately. Further, since it is not necessary to prepare a large number of static pressure adjusting members 4c in accordance with the adjustment amount of the static pressure, storage of the static pressure adjusting members 4c is facilitated and cost is reduced.
The mechanism for changing the adjustment amount of the static pressure is not limited to the mechanism using the slide plate 44 as shown in FIG. 8, and for example, the diaphragm blade is moved by rotating a dial to open the diaphragm. A mechanism or the like for adjusting the area may be used.

FIG. 9 is a perspective view showing a static pressure adjusting member 4d according to still another modification. Hereinafter, points different from the above-described embodiment will be mainly described, and description of common points will be omitted.
The static pressure adjusting member 4d shown in FIG. 9 has a metal plate 41 having an opening portion 42c through which air can pass, and the opening portion 42c is formed by the fan 23 of the blower 22 (see FIG. 2). Is formed at a position that flows evenly with respect to.

  By closing a part of the ventilation path 37 formed between the first ventilation port 35 and the second ventilation port 36 with the static pressure adjusting member 4d, the wind is disturbed, and as a result, the load applied to the fan 23 of the blower 22 is increased. Abnormal noise may occur. However, in the above-described static pressure adjusting member 4d, since the air that has passed through the opening 42c flows evenly to the downstream fan 23, the flow of the air becomes smooth and the load applied to the fan 23 becomes uniform. Generation of abnormal noise can be suppressed.

9, a plurality of openings 42c are formed at positions corresponding to the respective positions of the plurality of fans 23 (see FIG. 2). That is, a straight line in the front-rear direction passing through the center of the opening 42c passes through the center of the fan 23. According to such a configuration, even when the blower 22 has a plurality of fans 23, the air that has passed through the opening 42c of the static pressure adjusting member 4d can be uniformly flown to each of the plurality of fans 23. Become.
When the blower 22 has, for example, one fan 23, the opening 42 c is desirably formed at a position corresponding to the position of the fan 23.

(2nd Embodiment)
FIG. 10 is a diagram illustrating an external configuration of an air conditioner 100a according to the second embodiment of the present invention. Hereinafter, points different from the first embodiment will be mainly described, and descriptions of common points will be omitted. The air conditioner 100a shown in FIG. 10 is a built-in type air conditioner.

  As shown in FIG. 10, the air conditioner 100 a includes an indoor unit main body 1, an outlet grill 61, an outlet duct 62, a box 3, a ceiling panel 65, and the like, which are suspended from a ceiling space. In the built-in type air conditioner 100a, a ceiling panel 65 is connected via a box 3 to a lower opening serving as an air suction port of the indoor unit main body 1. The air conditioner 100a draws indoor air from the ceiling panel 65, and introduces the indoor air into the indoor unit main body 1 via the box 3.

  In the second embodiment, the static pressure adjusting member 4 (see FIG. 3) can be inserted into the box 3 from the outside of the box 3 so as to be able to be inserted and removed in the horizontal direction. According to the second embodiment, similarly to the first embodiment, it is possible to easily adjust the static pressure even after the installation of the air conditioner 100a.

  As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described above. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of one embodiment can be added to the configuration of another embodiment. Further, for a part of the configuration of the above-described embodiment, it is possible to add, delete, or replace another configuration.

For example, in the above-described embodiment, the static pressure adjusting member 4 is configured to have the metal plate 41 having the opening 42 through which air can be ventilated, but the present invention is not limited to this. For example, the static pressure adjusting member may be configured to have a functional member made of a wind-permeable material having sound absorbing performance or oil resistance performance. According to such a configuration, in addition to the ability to adjust the static pressure by the static pressure adjusting member, a function of sound absorption performance or oil resistance performance can also be obtained. Thus, the air conditioners 100 and 100a can be applied to a quiet environment requiring sound absorption performance, or an oily environment such as a kitchen requiring oil resistance performance.
In this case, it is desirable to prepare a plurality of static pressure adjusting members having different static pressure adjusting amounts by changing the roughness (density), material, thickness, and the like of the functional member.

  In the above-described embodiment, the first ventilation port 35 of the box 3 is connected to the air suction port 15 of the indoor unit main body 1. However, the present invention is not limited to this. It may be connected to the outlet 16. In this case, the second ventilation port 36 is connected to the outlet duct 62. The box 3 is prepared separately from the filter box. With such a configuration, the same operation and effect as those of the above-described embodiment can be obtained.

  In the above-described embodiment, for example, the air conditioner 100 includes the blowout duct 62 and the suction duct 63, but is not limited thereto. That is, the air conditioner 100 may be used in a configuration that does not include at least one of the blowing duct 62 and the suction duct 63.

DESCRIPTION OF SYMBOLS 1 Indoor unit main body 15 Air inlet 16 Air outlet 21 Heat exchanger 22 Blower 23 Fan 3 Box 35 First ventilation port 36 Second ventilation port 4, 4a-4d Static pressure adjusting member 41 Metal plate 42, 42a-42c Opening Part 5,5a Filter 100,100a Air conditioner

Claims (9)

An indoor unit body with a built-in heat exchanger and blower,
A box provided outside the indoor unit main body and fixed to the indoor unit main body,
With
The box is
A first ventilation port connected to an air inlet or an air outlet of the indoor unit main body;
A second ventilation port communicating with the first ventilation port,
A plate-shaped static pressure adjustment member for adjusting a static pressure inserted between the first ventilation port and the second ventilation port in the box so as to be able to be inserted and removed from outside the box,
An air conditioner comprising: The first ventilation port is connected to the air suction port,
The said box has a filter which catches the foreign substance in the air inserted in the box between the said 1st ventilation port and the said 2nd ventilation port so that it can be inserted and removed from the outside of the box. 2. The air conditioner according to 1.   The air conditioner according to claim 2, wherein the static pressure adjusting member is arranged on an upstream side of an air flow from the filter. The static pressure adjusting member has a plate having an opening through which air can pass,
3. The air conditioner according to claim 2, wherein the opening is formed at a position where air passing through the opening flows evenly with respect to a fan of the blower. 4. The blower has a plurality of the fans,
The air conditioner according to claim 4, wherein a plurality of the openings are formed at positions corresponding to respective positions of the plurality of fans.   When the static pressure is higher than a predetermined value, a speed increase setting for setting a rotation speed of the fan of the blower to a speed equal to or higher than a standard rotation speed set as a standard is performed. The air conditioner as described.   The air conditioner according to claim 1, wherein the static pressure adjusting member has a metal plate having an opening through which air can flow.   2. The air conditioner according to claim 1, wherein the static pressure adjusting member has a functional member made of a ventilation material having sound absorption performance or oil resistance performance. 3.   The air conditioner according to claim 1, wherein the static pressure adjusting member is configured to be able to change an adjustment amount of a static pressure adjusted by the static pressure adjusting member.

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