WO2018029878A1

WO2018029878A1 - Indoor unit and air-conditioning device

Info

Publication number: WO2018029878A1
Application number: PCT/JP2017/005854
Authority: WO
Inventors: 佐藤　大和; 一浩土橋; 尾原　秀司
Original assignee: 日立ジョンソンコントロールズ空調株式会社
Priority date: 2016-08-10
Filing date: 2017-02-17
Publication date: 2018-02-15
Also published as: CN109477645A; JP2018025357A; KR20190021419A

Abstract

The purpose of the present invention is to divide the downstream side of a heat exchanger in an indoor unit of an air-conditioning device when viewed in a vertical cross section with regard to the rotational axis of a centrifugal fan, into a first region between the heat exchanger and a blowing port, and a second region encompassing the remaining area, deflecting the airflow in the vicinity of a louvre generated by the airflow that flows into the blowing port after passing through the second region, and thereby improving the performance of the air-conditioning device. In order to achieve this purpose, this indoor unit comprises a housing, a motor that generates rotational driving force, a centrifugal fan which is mounted to the motor and which blows out air sucked in from beneath, in a circumferential direction, a heat exchanger that surrounds the blowing direction of the centrifugal fan, and a blowing port that blows out air that has passed through the heat exchanger. Defining the part of the downstream part of the heat exchanger which is between the heat exchanger and the blowing port as a first region and the remaining area as a second region, a partition member which at least partially blocks the airflow which flows from the second region to the blowing port is provided.

Description

Indoor unit and air conditioner

The present invention relates to an indoor unit and an air conditioner.

In the abstract of Patent Document 1, FIG. 1, etc., a case having a top plate and side plates, a panel having a suction port at the center side on the lower side of the case and a blowout port at the outer periphery of the suction port, A motor disposed inside the body, a centrifugal blower fastened to a rotary shaft of the motor, a heat exchanger disposed on the outer peripheral side of the centrifugal blower, and a water receiver disposed below the heat exchanger; An air conditioner provided with a partition plate for dividing the flow path formed between the outer peripheral side of the heat exchanger and the side plate at the position corresponding to the outlet and along the short direction of the outlet. Indoor unit is disclosed.

JP, 2015-158318, A

In the indoor unit of the air conditioner disclosed in Patent Document 1, the air blown by the centrifugal fan passes through a substantially polygonal heat exchanger disposed so as to surround it, and a flat portion of the heat exchanger It flows into the room from the distributed outlets arranged along the. Below, the downwind side area of the heat exchanger when the indoor unit is viewed from above is divided into a first area between the heat exchanger and the outlet and a second area other than that. .

The air flow that has flowed from the heat exchanger into the first region flows into the outlet while maintaining the flow direction. On the other hand, the air flow that has flowed from the heat exchanger into the second region collides with the wall surface of the casing, changes the flow direction to the circumferential direction of the heat exchanger, and flows into the blowout port. Therefore, the air outlet has an air flow substantially perpendicular to the heat exchanger through the first area, an air flow directed circumferentially to the heat exchanger through the second area, and a second area. However, there are three types of air flow, that is, an oblique air flow in which the flow direction is not completely directed in the circumferential direction.

Since the air passage area of the outlet is small compared to the outlet area of the heat exchanger, contraction occurs when air flows into the outlet. Therefore, the air flow passing through the second region separates at the heat exchanger circumferential end of the blowout port to form a vortex. Due to this separation, an air passage area (hereinafter, referred to as an effective air passage area) that can effectively use the inside of the air passage of the blowout port is reduced, and a problem occurs that an increase in pressure loss causes an increase in power consumption. Further, during cooling, dew condensation occurs due to the hot and humid air taken in by the room coming in contact with the cooled louver due to the vortex generated in the vicinity of the louver, causing a problem that the dew condensation water falls into the room.

In patent document 1, the dew condensation which is the 2nd problem is prevented by providing the partition plate which divides along the short direction of a blower outlet in the air path of a blower outlet.

However, the vortices generated at the heat exchanger circumferential end of the outlet are due to the air flow passing through the second region and flowing into the outlet. Installing a partition plate in the air path of the outlet does not improve the air flow causing the vortex, and it is insufficient to rectify the flow near the louver and solve the first problem. there were.

Therefore, the indoor unit of the present invention suppresses the vortices generated at the heat exchanger circumferential end of the blowout port, rectifies the flow field in the vicinity of the louver, thereby reducing pressure loss and suppressing power consumption. The purpose is to provide a machine.

In order to solve the above problems, the indoor unit according to the present invention comprises a housing, a motor for generating a rotational driving force, a centrifugal fan attached to the motor and discharging air sucked from below in the circumferential direction, and the centrifugal fan A heat exchanger for surrounding the blowout direction of the heat exchanger, and a blowoff port for blowing out the air having passed through the heat exchanger, in the downwind area of the heat exchanger, the area between the heat exchanger and the blowout port When it is set as a 1st area | region and the other area | region is made into a 2nd area | region, the partition member which interrupts | blocks at least one part of the airflow which flows in into the said blower outlet from this 2nd area | region was provided.

According to the present invention, in the indoor unit of the air conditioner, the vortices generated at the end of the heat exchanger in the circumferential direction of the blowout are suppressed, and the flow near the louver is rectified to reduce pressure loss. It is possible to reduce power consumption.

It is a perspective view which shows the external appearance of the indoor unit of a common air conditioner. It is a top view when it sees from the top in the state which removed the panel from the indoor unit of FIG. FIG. 3 is a cross-sectional view showing a cross section AA of FIG. 2; It is a perspective view of the state which removed the housing | casing, the panel, and the louver from the indoor unit. It is the figure which showed the wind speed distribution in the air path of the blower outlet in the BB cross section of FIG. It is the wind speed distribution in the CC cross section shown in FIG. FIG. 5 is a plan view showing the internal configuration of the indoor unit of the first embodiment. FIG. 5 is a perspective view showing the internal configuration of the indoor unit of the first embodiment. It is the figure which showed the speed distribution in the air path of the blower outlet when Example 1 is applied. It is the figure which showed the wind speed distribution in the DD cross section shown in FIG. FIG. 14 is a perspective view showing the inside of the indoor unit of the second embodiment. FIG. 16 is a perspective view showing the inside of the indoor unit of the third embodiment. FIG. 18 is a perspective view showing the inside of the indoor unit of the fourth embodiment. FIG. 21 is a top view showing the inside of the indoor unit of the fourth embodiment. FIG. 18 is a perspective view showing the inside of the indoor unit of the fifth embodiment. FIG. 20 is a perspective view showing the inside of the indoor unit of the sixth embodiment.

First, a conventional air conditioner indoor unit will be described using FIGS. 1 to 5.

FIG. 1 is a perspective view showing the appearance of a conventional air conditioner indoor unit. The indoor unit is connected to an outdoor unit (not shown) via a refrigerant pipe to form an air conditioner. A compressor is built in the outdoor unit, and the refrigerant is compressed by the compressor, and a refrigerant cycle is formed by circulating in the refrigerant pipe.

As shown in FIG. 1, the indoor unit includes a housing 1 disposed in a ceiling and a panel 2 mounted on the indoor side of the housing 1. The panel 2 is provided with a grill 3 for taking in air and an outlet 4 for blowing out the air sucked from the grill 3 into the room. A louver 5 is attached to each of the outlets 4 to adjust the blowing direction of air.

FIG. 2 is a plan view when viewed from above with the housing 1 and the panel 2 removed from the indoor unit. FIG. 3 is a cross-sectional view taken along the line AA of FIG.

As shown in FIGS. 2 and 3, a motor 40 for generating a rotational driving force and a motor 40 attached to the interior of a housing 1 of the indoor unit, and air sucked from below through the grille 3 and the filter 9 And a heat exchanger 8 disposed so as to surround the centrifugal fan 6 in the blowing direction of the centrifugal fan 6. The heat exchanger 8 exchanges heat between the air from the centrifugal fan 6 and the refrigerant. Below the heat exchanger 8 is attached a drain pan 7 for holding water so that the condensed water condensed by the heat exchanger 8 does not fall into the room during the cooling operation. Hereinafter, the flow of air by the centrifugal fan 6 will be referred to as an air flow 50, and a straight line serving as an axis of rotation of the centrifugal fan will be referred to as a rotational axis Z.

As shown in FIG. 2, when viewed in a cross section perpendicular to the rotation axis Z of the centrifugal fan 6, the leeward region of the substantially polygonal heat exchanger 8 is between the heat exchanger 8 and the outlet 4. The first region 20 is referred to as the first region 20, and the second region 21 is referred to as the second region. The air flow 50a passing through the first area 20 flows into the outlet 4 in a direction substantially perpendicular to the heat exchanger 8, and the air flow passing through the second area 21 is an air flow 50b in the circumferential direction of the heat exchanger 8. And the air flow 50 c between the first area 20 and the air flow 50 c in the oblique direction flows into the air outlet 4.

FIG. 4 is a perspective view of a state in which the housing 1, the panel 2 and the louver 5 are removed from the indoor unit, and the vicinity of the curved surface portion of the outflow surface of the heat exchanger 8 is enlarged. As apparent from FIG. 2, since the air passage area of the outlet 4 is smaller than the outlet area of the heat exchanger 8, contraction of air occurs when the air flows into the outlet 4. Therefore, as shown in FIG. 4, the air flows 50 b and 50 c passing through the second region 21 are exfoliated at the end of the heat exchanger 8 in the circumferential direction of the blowout port 4, and a vortex 60 is generated.

FIG. 5 is a view showing the wind speed distribution in the air path of the blowout port 4 in the BB cross section of FIG. 3, and shows the wind speed distribution with the maximum wind speed being 1. The wind speed distributions shown below are all the same. As shown here, due to the separation occurring at the heat exchanger 8 circumferential direction end of the outlet 4, a low speed area shown in dark tone is formed at the corner of the outlet 4. This low speed region causes a decrease in the effective air passage area of the blowout port 4 and causes an increase in pressure loss.

FIG. 6 is a wind speed distribution on the cross section CC shown in FIG. As shown here, it can be seen that the color tone is thin on the left side of the louver 5 and the speed is large. Also, it can be seen that the color tone is dark on the right side of the louver 5 where the vortex 60 is generated, and the air hardly flows. Furthermore, the air within the room is entrained by the vortex 60, and an air flow 52 is generated which collides with the right side of the louver 5.

Since the louver 5 is cooled by the air flow 50 during the cooling operation, dew condensation occurs in the louver 5 when the high-temperature and high-humidity air flow 52 contacts the louver 5. As a result, it is conceivable that the condensed water condensed by the louver 5 may fall into the room during a long cooling operation.

As described above, the vortices 60 caused by the air flows 50 b and 50 c from the second region 21 cause a problem of an increase in pressure loss of the blowout port 4 and condensation of the louver 5.

Hereinafter, an embodiment of the present invention will be described as a configuration that solves this problem.

The internal structure of the indoor unit of the air conditioner of Example 1 is shown using FIGS. 7-10. Note that the description in common with the explanation of FIGS. 1 to 6 is omitted.

FIG. 7 is a plan view when the housing 1 is removed from the indoor unit of the present embodiment as viewed from above. As shown here, in the present embodiment, the partition member 10 for blocking at least a part of the air flows 50 b and 50 c flowing from the second region 21 into the blowout port 4 is provided above the drain pan 7. In FIG. 7, as an example, the partition members 10 are provided at both ends of all the second regions 21, but some partition members are taken into consideration in terms of the cost required for manufacturing and the method thereof, and the flow field of each outlet. Only the number 10 may be provided.

FIG. 8 is a perspective view in the vicinity of the curved surface portion of the outflow surface of the heat exchanger 8, and shows the shape of the partition member 10, the mounting position, and the like. As shown here, the flat partition member 10 of height L is attached to the end of the outlet 4 which is the upper part of the drain pan 7 and which is the boundary between the first area 20 and the second area 21. Thereby, the

airflows

50b and 50c passing through the second area 21 change, and the surface of the partition member 10 on the second area 21 side, the space between the partition member 10 and the top plate of the housing 1, the first region of the partition member 10 Since the air flows into the air outlet 4 through the flow path sequentially passing through the surface on the 20 side, the generation of the vortex 60 caused by the

air flow

50b and 50c at the air outlet 4 can be prevented, and the flow around the louver 5 is rectified more effectively can do.

At this time, assuming that the height of the partition member 10 is L and the height of the heat exchanger 8 is H, the flow in the vicinity of the louver 5 is more effectively performed by setting 0.2 ≦ L / H ≦ 0.8. It becomes possible to rectify. In the case where a plurality of partition members 10 are provided, the heights of the partition members 10 may not all be aligned.

FIG. 9 is a view showing the velocity distribution in the air passage of the outlet 4 of the present embodiment. The wind speed distribution shown here is on the cross section BB shown in FIG. From the comparison between FIG. 5 and FIG. 9, it can be confirmed that the low speed region largely present at the corner of the outlet 4 in FIG. 5 corresponding to the conventional configuration is significantly reduced by providing the partition member 10.

FIG. 10 is a view showing the wind velocity distribution in the DD cross section shown in FIG. 9, and it can be understood that the color tone is thin and the speed is large even on the right side of the louver 5 by providing the partition member 10. . That is, it can be seen that the flow near the louver 5 is rectified and the generation of the vortex 60 is suppressed. As a result of the vortex 60 not being generated, the hot and humid air flow 52 does not collide with the cooled louver 5, so that the occurrence of condensation at the end of the louver 5 can be avoided.

As described above, according to the present embodiment, by providing the partition member 10, the flow around the louver 5 can be rectified, and the pressure loss of the outlet 4 due to the expansion of the effective air passage area can be reduced. It is possible to suppress condensation.

In the present embodiment, the partition member 10 is illustrated as a flat plate, but if at least a part of the air flows 50b and 50c passing through the second region 21 can be blocked, the thickness and height partially change. It may be a member constituted by such a member or a curved surface. In this case, if the partition member 10 is a thin plate, the area in which the partition member blocks the outflow surface of the heat exchanger 8 can be reduced, and the pressure loss of the partition member itself can be reduced. Although the partition member 10 is attached to the drain pan 7 in FIG. 8, the partition member 10 may be attached to the housing 1 or integrally formed with the housing 1.

Although the partition member 10 is attached to the drain pan 7 in FIG. 8, the partition member 10 may be attached to the heat exchanger 8 or may be integrally formed with the fins of the heat exchanger 8. In that case, since the heat transfer area of the heat exchanger 8 is expanded, it is possible to improve the heat exchange performance in addition to the effects described above.

In the above, an indoor unit provided with the centrifugal fan 6, the heat exchanger 8, the drain pan 7 provided at the lower part of the heat exchanger 8, the blowout port 4, and the louver 5 for determining the blowing direction of air The centrifugal fan 6, the heat exchanger 8 and the drain pan 7 are disposed, and when viewed in a cross section perpendicular to the rotational axis of the centrifugal fan 6, the heat exchanger 8 and the blowout region in the leeward region of the heat exchanger 8. An indoor unit having a first region 20 between the outlet 4 and the other region as the second region 21, and the air flow passing through the second region 21 causes the heat exchanger 8 of the outlet 4 to rotate The present invention can be applied to any indoor unit having a structure in which the end of the direction ends exfoliates to generate a vortex 60, thereby causing disturbance in the air flow flowing around the louver 5. Further, the partition member does not necessarily have to be integrally molded, and may be a member obtained by combining a plurality of parts as long as the same effect can be obtained.

FIG. 11 is a view showing the inside of the indoor unit when the second embodiment is applied. Although the flat partition member 10 is used in the first embodiment, the curved partition member 11 is used in the present embodiment. The description of the points common to the first embodiment will be omitted.

As shown in FIG. 11, it is possible to rectify the flow around the louver 5 more effectively by inclining the surface of the partition member 11 facing the outlet 4 side in the direction away from the first region 20. . In addition, it becomes possible to control the exfoliation which occurs on partition member 11 upper part, and it becomes possible to reduce the pressure loss by partition member 11.

By changing the shape of the inclined surface according to the flow field of each outlet, it is possible to rectify the flow around the louver 5 more effectively.

FIG. 12 is a view showing the inside of the indoor unit when the third embodiment is applied. In the first embodiment, the partition member 10 is provided at the boundary between the first region 20 and the second region 21. However, in the present embodiment, the partition member 12 is provided closer to the second region 21 and the end of the outlet 4 is chamfered. The corner portion 71 is provided. Note that the description in common with the above-described embodiment will be omitted.

Even if the partition member 12 is attached to the inside of the indoor unit and the partition member 12 is attached at a position where the high temperature and humid air in the room is not in direct contact, the temperature of the air passing through the heat exchanger 8 is uneven. Condensation may occur on the

Therefore, as shown in FIG. 12, by moving the mounting position of the partition member 12 toward the second area 21, it is possible to prevent the condensed water produced by the partition member 12 from falling into the room. In addition, by chamfering the corner 71 of the outlet 4, the air flows 50b and 50c can be more smoothly flowed.

The configuration described here may be used in combination with the second embodiment.

FIG. 13 is a perspective view showing the inside of the indoor unit when the fourth embodiment is applied, and FIG. 14 is a plan view of the present embodiment. Although the partition member 10 is provided only above the drain pan 7 in the first embodiment, the partition member 13 extended also in the drain pan 7 is provided in the present embodiment. Note that the description in common with the above-described embodiment will be omitted.

As in the third embodiment, in order to prevent the condensed water condensed on the partition member from falling into the room, in the present embodiment, as shown in FIG. 14, the mounting position of the partition member 13 is the second region 21. I moved to. Further, in order to prevent the air flow 50 b from leaking from below the partition member 13, the partition member 13 was extended until it reached the bottom surface of the drain pan 7.

If at least a part of the air flows 50 b and 50 c can be blocked by such a partition member 13, the flow around the louver 5 can be rectified even if it moves further toward the second region 21.

Further, by providing the partition member 13 at a predetermined distance from the inner wall of the side surface portion of the drain pan 7, the condensed water falls to the drain pan 7 even if dew condensation occurs on the partition member 13. It can prevent falling.

The configuration of the present embodiment may be used in combination with the configuration of the above-described embodiment.

FIG. 15 is a view showing the inside of the indoor unit when the fifth embodiment is applied. Although the flat partition member 10 is used in the first embodiment, the partition member 14 having a through hole is used in the present embodiment. The description of the points common to the first embodiment will be omitted.

As shown in FIG. 15, the pressure loss due to the partition member 14 can be reduced by providing the partition member 14 with a hole through which air of a predetermined flow rate can pass. In FIG. 15, the holes are three rectangular slits per partition member, but the shape, number, and position of the holes may be any as long as air having a predetermined flow rate can pass therethrough. As a result, the flow resistance of the air flow 50b and the like is reduced, so that the pressure loss can be further suppressed.

FIG. 16 is a view showing the inside of the indoor unit when the sixth embodiment is applied. Although the flat partition member 10 is used in the first embodiment, the partition member 15 of the mesh material is used in the present embodiment. The description of the points common to the first embodiment will be omitted.

As shown in FIG. 16, the pressure loss due to the partition member 15 can be reduced by making the partition member 15 a mesh material through which air of a predetermined flow rate can pass. Moreover, when the

airflows

50 b and 50 c pass over the partition member 15, it is possible to suppress the peeling that occurs above the partition member 15, and it is possible to more effectively reduce the pressure loss. In FIG. 16, although all the partition members 15 are comprised by the mesh raw material, it does not matter as a mesh raw material partially.

Reference Signs List 1 housing, 2 panels, 3 grills, 4 outlets, 5 louvers 6 centrifugal fans, 7 drain pans, 8 heat exchangers, 9 filters, 10, 11, 12, 13, 14, 15 partition members, 20 first area, 21 second region, 40

motors

50, 50a, 50b, 50c, 52 airflow, 60 vortices 71 corner portion Z rotation axis

Claims

And
A motor that generates a rotational driving force,
A centrifugal fan attached to the motor and discharging air drawn from below in the circumferential direction;
A heat exchanger for surrounding the blowing direction of the centrifugal fan;
An outlet for blowing out the air that has passed through the heat exchanger;
Equipped with
In the downwind region of the heat exchanger, when the region between the heat exchanger and the outlet is a first region, and the other region is a second region,
An indoor unit comprising a partition member for blocking at least a part of the air flow flowing into the outlet from the second region.
In the indoor unit according to claim 1,
The indoor unit according to claim 1, wherein the partition member is provided at an end of the outlet which is a boundary between the first area and the second area.
In the indoor unit according to claim 1,
And a drain pan disposed below the heat exchanger,
The indoor unit characterized in that the partition member is fixed to any one of the housing, the heat exchanger, and the drain pan.
In the indoor unit according to claim 1,
An indoor unit having a space between the partition member and a top plate of the housing.
In the indoor unit according to claim 1,
An indoor unit characterized in that a surface of the partition member facing the outlet side is inclined in a direction away from the first region.
In the indoor unit according to claim 1,
And a drain pan disposed below the heat exchanger,
The drain pan has a bottom surface portion and a side surface portion to hold drain water of the heat exchanger, and the outer wall surface of the side surface portion constitutes the outlet.
The indoor unit characterized in that the partition member is provided at a predetermined distance from an inner wall surface of the side surface portion at an end portion of the outlet.
In the indoor unit according to claim 1,
The indoor unit characterized in that the partition member is a thin plate.
In the indoor unit according to claim 1,
An indoor unit provided with a through hole in the partition member.
In the indoor unit according to claim 1,
The indoor unit characterized in that the partition member is made of a mesh material.
An air conditioner comprising: the indoor unit according to any one of claims 1 to 9; and an outdoor unit connected to each other.