JP2018119742A - Indoor equipment of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce variations in wind speed distribution of an indoor heat exchanger.SOLUTION: Indoor equipment 2 of an air conditioner includes: a housing 5 in which an air inlet 6 for suctioning indoor air through filters 9a, 9b and an air outlet 7 for blowing air to an indoor space are formed; a blower 8 disposed in the housing; and an indoor heat exchanger 10 which is disposed between the air inlet and the blower so as to enclose the blower. The indoor heat exchanger has: a front heat exchanger 101 disposed at the front side relative to the blower; and a rear heat exchanger 102 disposed at the rear side relative to the front heat exchanger. A projection part 17t is provided at a top Pt1 of the front heat exchanger or a top part Pt2 of the rear heat exchanger.SELECTED DRAWING: Figure 2

Description

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

  An indoor unit of an air conditioner sucks indoor air as inflow air and passes the inflow air through an indoor heat exchanger to obtain conditioned air that has been subjected to any treatment of heating, cooling, and dehumidification. This is a device for air conditioning the room by blowing out the conditioned air thus obtained.

  An indoor unit of an air conditioner is required to obtain high heat exchange efficiency with low power consumption. Therefore, in the indoor unit, for example, the built-in indoor heat exchanger has a multistage bent shape or an arc shape, and the indoor heat exchanger surrounds the blower, Some have increased area to obtain high heat exchange efficiency.

  However, the indoor unit configured as described above has a limit in obtaining high heat exchange efficiency without increasing the size of the casing because the casing becomes larger when the area of the indoor heat exchanger is enlarged. . Therefore, some indoor units obtain high heat exchange efficiency by, for example, reducing the air ventilation resistance of the indoor heat exchanger (see, for example, Patent Document 1).

  Patent Document 1 describes an indoor unit in which an indoor heat exchanger having the following configuration is built. That is, the indoor heat exchanger includes a large number of long plate-like fins (heat exchange plates) for exchanging heat between the refrigerant and the inflow air, and a plurality of refrigerant tubes for flowing the refrigerant. And have. Each side of each fin is linear. Each fin is arranged in a plurality of rows (for example, two rows) parallel to the depth direction along the side in the longitudinal direction. Moreover, each fin is arrange | positioned in parallel with the horizontal direction. The refrigerant tube is a flat tube. Each flat tube is attached so as to be orthogonal to the fin. The indoor heat exchanger has a configuration in which a plurality of rows of fins are set as one set, and each set of fins is arranged in a substantially “Λ” shape so as to surround the blower. And between adjacent rows, the flat tubes of the leeward fins and the flat tubes of the leeward fins are arranged in a staggered arrangement. In the indoor heat exchanger having this configuration, the refrigerant pipe is a flat pipe, and the flat pipes are arranged in parallel, so that the air ventilation resistance can be reduced.

Japanese Patent No. 4845943 (FIG. 9A)

  However, as described below, the conventional indoor unit described in Patent Document 1 has a problem that the wind speed distribution characteristic of the indoor heat exchanger changes at a location where the flat tube arrangement direction changes. It was.

  That is, in a conventional indoor unit, a location where the arrangement direction of the flat tube changes (for example, a location where fins arranged in a substantially “Λ” shape intersect each other) is between the flat tube and the flat tube. There is a gap (FIG. 9A in Patent Document 1). This point will be described in detail below. For example, the flat tubes provided on the individual fins are arranged in parallel. Therefore, the space | interval of the flat tubes provided in each fin is a fixed arrangement | positioning pitch, and the clearance gap larger than the arrangement | positioning pitch is not produced. However, at a location where the arrangement direction of the flat tube changes (for example, a location where fins arranged in a substantially “Λ” shape intersect with each other), the flat tube provided on one fin (one flat tube) And the flat tube provided with the other fin (the other flat tube) are not parallel to each other. Specifically, one flat tube and the other flat tube have an arrangement relationship in which the distance between the flat tubes increases on the windward side and the distance between the flat tubes decreases on the leeward side. Therefore, in the place where the arrangement direction of the flat tube changes, the interval between the one flat tube and the other flat tube is not a constant arrangement pitch, and the arrangement is between the one flat tube and the other flat tube. There is a gap larger than the pitch.

  In such a conventional indoor unit, a gap larger than the arrangement pitch of the flat tubes is generated at a location where the arrangement direction of the flat tubes is changed, and thus the wind speed distribution of the indoor heat exchanger is varied. And in the location where the arrangement direction of a flat tube changes, inflow air (room air suck | inhaled inside the indoor unit) may pass without fully contacting a flat tube. In other words, the inflowing air may pass through without sufficiently exchanging heat with the refrigerant flowing inside the flat tube. Therefore, the conventional indoor unit has a possibility that the heat exchange efficiency is lowered.

  The present invention has been made to solve the above-described problems, and has as its main object to provide an indoor unit of an air conditioner that reduces variations in the wind speed distribution of the indoor heat exchanger.

In order to achieve the above object, the present invention provides an indoor unit of an air conditioner, wherein a housing formed with a suction port for sucking room air through a filter and a blow-out port for blowing air into the room, and the housing A blower disposed inside a body, and an indoor heat exchanger disposed so as to surround the blower at a position between the suction port and the blower, and the indoor heat exchanger includes the blower A front heat exchanger disposed in front of the front heat exchanger, and a rear heat exchanger disposed rearward of the front heat exchanger, the top of the front heat exchanger or the rear heat. It is set as the structure by which the projection part is provided in the top part of the exchanger.
Other means will be described later.

  According to the present invention, variation in the wind speed distribution of the indoor heat exchanger can be reduced.

1 is an overall configuration diagram of an air conditioner according to an embodiment. It is an internal block diagram of the indoor unit of the air conditioner according to the embodiment. It is an internal block diagram of the flat tube of the indoor heat exchanger built in the indoor unit which concerns on embodiment. It is a block diagram of the top part of the indoor heat exchanger built in the indoor unit which concerns on embodiment. It is a block diagram of the bending part of the front side indoor heat exchanger used for the indoor heat exchanger incorporated in the indoor unit which concerns on embodiment. It is supplementary explanatory drawing (1) of the front side indoor heat exchanger used for the indoor heat exchanger incorporated in the indoor unit which concerns on embodiment. It is supplementary explanatory drawing (2) of the front side indoor heat exchanger used for the indoor heat exchanger incorporated in the indoor unit which concerns on embodiment. It is an internal block diagram of the indoor unit of the air conditioner which concerns on a modification.

  Hereinafter, an embodiment of the present invention (hereinafter referred to as “the present embodiment”) will be described in detail with reference to the drawings. Each figure is only schematically shown so that the present invention can be fully understood. Therefore, the present invention is not limited to the illustrated example. Moreover, in each figure, the same code | symbol is attached | subjected about the common component and the same component, and those overlapping description is abbreviate | omitted.

[Embodiment]
This embodiment is also intended to solve the following problems of conventional indoor units. That is, in the conventional indoor unit, the indoor heat exchanger is formed in a substantially “Λ” shape so as to surround the blower with the indoor heat exchanger. However, the indoor heat exchanger may not only have a substantially “Λ” shape but also an arc shape, a “<” shape, or the like. In such a conventional indoor unit, the wind speed distribution of the indoor heat exchanger is not uniform. Therefore, in the present embodiment, a protrusion is provided at a location where the wind speed distribution of the indoor heat exchanger becomes non-uniform so that the air ventilation resistance of the indoor heat exchanger is made uniform, and the wind speed distribution of the indoor heat exchanger is made uniform. An indoor unit is provided. In addition, this embodiment easily assembles and manufactures the indoor heat exchanger by providing pilot holes necessary for improving the workability of the fins inside the protrusions and optimizing the arrangement positions of the protrusions. An indoor unit that can be provided is provided.

<Configuration of indoor unit of air conditioner>
Hereinafter, with reference to FIG. 1 thru | or FIG. 7, it demonstrates per structure of the indoor unit 2 of the air conditioner 1 which concerns on this embodiment. FIG. 1 is an overall configuration diagram of an air conditioner 1 according to the present embodiment. FIG. 2 is an internal configuration diagram of the indoor unit 2 of the air conditioner 1. FIG. 3 is an internal configuration diagram of the flat tube 16 of the indoor heat exchanger 10 built in the indoor unit 2. FIG. 4 is a configuration diagram of the top portion Pt of the indoor heat exchanger 10. FIG. 5 is a configuration diagram of the bent portion Pf of the front indoor heat exchanger 101 used in the indoor heat exchanger 10. 6 and 7 are supplementary explanatory views of the front indoor heat exchanger 101, respectively.

  As shown in FIG. 1, the air conditioner 1 according to this embodiment includes an indoor unit 2 disposed indoors and an outdoor unit 3 disposed outdoors (outdoors).

  The indoor unit 2 sucks room air into the interior as inflow air, passes the inflow air through the indoor heat exchanger 10 (see FIG. 2), and has been subjected to any processing of heating, cooling, and dehumidification. The indoor air is conditioned by blowing out the obtained conditioned air into the room. The indoor unit 2 is connected to the outdoor unit 3 via the connection pipe 4, and the refrigerant is circulated with the outdoor unit 3. The outdoor unit 3 performs heat exchange between the refrigerant and the outdoor air. An electrical wiring (not shown) is disposed inside the connection pipe 4.

  The indoor unit 2 includes a housing 5 in which a resin is molded and processed into a horizontally long substantially box-shaped outer shape. The indoor unit 2 covers the upper surface, side surfaces, and lower surface of the housing 5 with a decorative frame 11, and covers the front surface of the housing 5 with a front panel 12 that can be opened and closed at the top. The housing 5 is formed with a suction port 6 for sucking room air and a blowout port 7 for blowing out air whose temperature and humidity are harmonized by heat exchange.

  The suction port 6 includes a suction port 6 a (see FIG. 2) disposed on the upper surface side of the housing 5 and a suction port 6 b (see FIG. 2) disposed on the front surface side of the housing 5. A top filter 9a (see FIG. 2) and a front filter 9b (see FIG. 2) for removing dust from room air sucked into the interior of the housing 5 are arranged in the suction ports 6a and 6b, respectively. Yes.

  The front panel 12 is pivotally supported by the decorative frame 11 (or the housing 5) in the vicinity of the lower end, and the upper part is configured to open and close by being rotated in the front-rear direction by a drive unit (not shown). The indoor unit 2 opens the front inlet 12b (see FIG. 2) by opening the front panel 12.

As shown in FIG. 2, the indoor unit 2 includes a blower 8, an indoor heat exchanger 10, a front dew tray 13a, and a rear dew tray 13b inside.
The blower 8 is a once-through fan that sends air from the inlet 6 side to the outlet 7 side.
The indoor heat exchanger 10 is a unit that performs heat exchange between the refrigerant and the inflow air (room air sucked into the interior of the indoor unit 2).
The front dew tray 13a is a dew pan that is disposed below the front heat exchanger 101 described later.
The rear dew tray 13b is a dew tray that is disposed below the rear heat exchanger 102 described later.

  The blower 8 is disposed at the approximate center inside the indoor unit 2. The diameter and the width of the blower 8 are large enough to be accommodated inside the housing 5 of the indoor unit 2. When the blower 8 rotates, room air is sucked into the indoor unit 2 as inflow air from the suction port 6, and blown out from the blowout port 7 through the filters 9 a and 9 b, the indoor heat exchanger 10, and the blower 8. The The indoor unit 2 includes a left and right wind direction plate (not shown) in the middle of the air outlet 7, and can deflect the air blown from the air outlet 7 in the left and right direction. Further, the indoor unit 2 includes a vertical wind direction plate 14 that is rotatable in the vertical direction in the vicinity of the outlet of the blowout port 7, and can deflect the air blown from the blowout port 7 in the vertical direction.

  The indoor heat exchanger 10 is disposed so as to surround the blower 8 at a position between the suction port 6 and the blower 8. The indoor heat exchanger 10 has a front heat exchanger 101 disposed in front of the blower 8 (front of the housing 5) and a rear heat disposed in the rear of the front heat exchanger 101 (rear of the housing 5). And an exchanger 102.

  In the present embodiment, description will be made assuming that the front heat exchanger 101 includes two exchangers 101a and 101b. Further, the description will be made assuming that the rear heat exchanger 102 includes two exchangers 102a and 102b. The two exchangers 101a and 101b are arranged so as to overlap in the depth direction. Similarly, the two exchangers 102a and 102b are also arranged so as to overlap in the depth direction.

  The front heat exchanger 101 has a size that surrounds (closes) the front of the blower 8 as a single unit, and has a shape in which a substantially central portion in the height direction is bent as a bent portion Pf. Such a front heat exchanger 101 can be disposed along the outer periphery of the blower 8 so as to be orthogonal to the air flow (see the white arrow) flowing toward the blower 8 as much as possible. The width of the front heat exchanger 101 is the same as the width of the blower 8. A portion above the bent portion Pf of the front heat exchanger 101 (upper part of the front heat exchanger 101) has a shape extending substantially linearly. Moreover, the site | part (lower part of the front side heat exchanger 101) below the bending part Pf of the front side heat exchanger 101 is also exhibiting the shape extended substantially linearly.

  The rear heat exchanger 102 has a size that surrounds (closes) the upper and rear sides of the blower 8 and extends substantially linearly. The lateral width of the rear heat exchanger 102 is equal to the lateral width of the blower 8.

  In the present embodiment, the front heat exchanger 101 and the rear heat exchanger 102 are individually manufactured in consideration of the handleability of the indoor heat exchanger 10 at the time of manufacture. At the time of manufacture, the front heat exchanger 101 and the rear heat exchanger 102 are substantially in the “Λ” shape so that the top Pt1 of the front heat exchanger 101 and the top Pt2 of the rear heat exchanger 102 come into contact with each other. The indoor heat exchanger 10 is manufactured by being arranged and joined. Such an indoor heat exchanger 10 has a shape in which the top portion Pt has an outer shape of approximately “Λ”.

  The upper surface of the top portion Pt of the indoor heat exchanger 10 has a substantially linear shape so as to be in a substantially parallel arrangement relationship with the upper surface filter 9a. The top portion Pt1 of the front heat exchanger 101 and the top portion Pt2 of the rear heat exchanger 102 are formed such that the top portion Pt of the indoor heat exchanger 10 has such a shape. Specifically, in the top portion Pt1 of the windward side exchanger 101a in the front heat exchanger 101, the length of the outer wall portion O101a and the length of the inner wall portion I101a at the upper portion of the exchanger 101a are substantially the same (strictly speaking, The outer wall portion O101a has a shape cut obliquely so that the length of the outer wall portion O101a is slightly shorter than the length of the inner wall portion I101a. Further, the top portion Pt1 of the leeward side exchanger 101b in the front heat exchanger 101 is cut obliquely so that the length of the outer wall portion O101b and the length of the inner wall portion I101b at the upper portion of the exchanger 101b are substantially the same. It has a shape. Further, the windward-side exchanger 102b in the rear heat exchanger 102 has a shape cut obliquely so that the length of the outer wall portion O102b of the exchanger 102b and the length of the inner wall portion I102b are substantially the same. Yes. Further, the leeward exchanger 102a in the rear heat exchanger 102 has a shape cut obliquely so that the upper surface of the exchanger 102a is along the inner wall portion I101b of the exchanger 101b of the front heat exchanger 101. Yes. The indoor unit 2 has a structure in which the upper surface of the exchanger 102a of the rear heat exchanger 102 is in contact with the side surface of the exchanger 101b of the front heat exchanger 101.

The shape of the top portion Pt of the indoor heat exchanger 10 is intended for the following points.
That is, the indoor heat exchanger 10 is disposed so as to surround the blower 8 located at the approximate center of the indoor unit 2. The indoor air is sucked into the indoor unit 2 as inflow air when the blower 8 is driven. The inflow air passes through the indoor heat exchanger 10 through the top filter 9a and the front filter 9b. In general, in the indoor heat exchanger 10, in order to improve heat exchange efficiency, the heat transfer area is expanded as much as possible, or the number of refrigerant tubes 16 is increased. However, the height of the indoor unit 2 is limited to a size smaller than the specified size by the standard. Therefore, the indoor unit 2 needs to keep the height within the specified dimensions. Therefore, in the present embodiment, the shape of the top portion Pt of the indoor heat exchanger 10 is to maximize the heat transfer area while ensuring a gap of a desired distance or more between the top portion Pt and the upper surface filter 9a. So that it is substantially linear. Moreover, the shape of the top portion Pt of the indoor heat exchanger 10 is substantially parallel to the upper surface filter 9a.

  The indoor heat exchanger 10 has a large number of long plate-like fins (heat exchange plates) 15a, 15b, 15c, and 15d for exchanging heat between the refrigerant and the inflowing air, and for flowing the refrigerant. And a large number of refrigerant pipes 16. Each fin 15a, 15b, 15c, 15d is comprised by the thin board made from aluminum, for example. The refrigerant pipe 16 is made of, for example, copper or aluminum. Each fin 15a, 15b, 15c, 15d is formed with a hole (or notch) (not shown), and the refrigerant pipe 16 is inserted into the hole (or notch). Each side of each fin 15a, 15b, 15c, 15d is substantially linear.

  The fins 15a and 15b constitute main parts of the exchangers 101a and 101b of the front heat exchanger 101, respectively. The fins 15c and 15d constitute main parts of the exchangers 102a and 102b of the rear heat exchanger 102, respectively. Each of the exchangers 101a and 101b of the front heat exchanger 101 has a configuration in which a large number of fins 15a and 15b are arranged in parallel at a constant arrangement pitch in the lateral direction. Each of the exchangers 102a and 102b of the rear heat exchanger 102 has a configuration in which a large number of fins 15c and 15d are arranged in parallel in the horizontal direction at intervals of a constant arrangement pitch.

  Accordingly, the fins 15a, 15b, 15c, and 15d are arranged in a plurality of rows (two rows in this embodiment) in parallel with the depth direction along the side in the longitudinal direction. Moreover, each fin 15a, 15b, 15c, 15d is arrange | positioned in parallel with the horizontal direction. Hereinafter, the fins 15a, 15b, 15c, and 15d are collectively referred to as “fin 15”.

  In the present embodiment, among the exchangers 101a and 101b and the exchangers 102a and 102b, the exchanger far from the blower 8 is the windward exchanger, and the exchanger close to the blower 8 is the leeward exchanger. That is, the exchangers 101a and 102b are leeward exchangers, and the exchangers 101b and 102a are leeward exchangers. Of the fins 15a, 15b, 15c and 15d, the fins 15a and 15d are leeward fins, and the fins 15b and 15c are leeward fins.

  The refrigerant tube 16 is a flat tube. Hereinafter, the refrigerant pipe 16 may be referred to as a “flat pipe 16”. As shown in FIG. 3, a large number of refrigerant channels 116b are formed in the flat tube 16 by partition walls 116a. Thereby, the indoor heat exchanger 10 has a configuration in which the heat transfer area inside the flat tube 16 that is a refrigerant tube is expanded. Therefore, the indoor unit 2 can improve the heat transfer performance of the indoor heat exchanger 10. In the example shown in FIG. 3, five partition walls 116 a are formed inside the flat tube 16. However, the present invention is not limited to this, and the number of partition walls 116a can be arbitrarily determined in consideration of heat transfer performance and productivity.

  Returning to FIG. 2, each flat tube 16 is attached so as to be orthogonal to the fin 15. In the individual fins 15, the flat tubes 16 are arranged in parallel at intervals of a constant arrangement pitch. Further, each flat tube 16 is arranged at a right angle to the longitudinal side of the fin 15. Inflow air (room air sucked into the interior of the indoor unit 2) flows between the flat tube 16 and the flat tube 16. Thereby, the indoor unit 2 exchanges heat between the refrigerant flowing in the refrigerant pipe 16 and the inflowing air.

  The indoor heat exchanger 10 is configured to surround the blower 8 with a front heat exchanger 101 configured with the exchangers 101a and 101b and a rear heat exchanger 102 configured with the exchangers 102a and 102b. The flat tubes 16 of the fins 15a on the windward side are arranged between adjacent rows of exchangers (between the exchangers 101a and 101b and between the exchangers 102a and 102b in this embodiment). And the flat tubes 16 of the leeward fins 15b are arranged in a staggered arrangement, and the flat tubes 16 of the leeward fins 15d and the flat tubes 16 of the leeward fins 15c are arranged in a staggered arrangement. Is arranged.

  In such an indoor heat exchanger 10, the refrigerant pipe 16 is a flat pipe, and the flat pipes 16 are arranged in parallel, so that the air draft resistance can be reduced. Moreover, since the indoor heat exchanger 10 is arranged so that the flat tubes 16 of the fins 15a and 15d on the leeward side and the flat tubes 16 of the fins 15b and 15c on the leeward side are arranged in a staggered manner, It can be efficiently applied to the flat tube 16, and as a result, the heat transfer performance can be improved.

  The top portion Pt1 of the front heat exchanger 101 or the top portion Pt2 of the rear heat exchanger 102 (in this embodiment, the top portion Pt1 of the front heat exchanger 101) is provided with a protrusion 17t for diffusing the inflowing air to the surroundings. It has been. Further, the bent portion Pf of the front heat exchanger 101 is also provided with a protrusion 17f for diffusing the inflowing air to the surroundings. In the example shown in FIG. 2, the protrusions 17t and 17f are circular in a side view, but the shape is not limited to a circular shape. The protrusions 17t and 17f can be formed in an elliptical shape or a flat shape, for example, in a side view.

  As shown in FIG. 4, in the indoor unit 2, the inflowing air passes through the upper part of the indoor heat exchanger 10 along the air flow indicated by the white arrows Af1, At, Ar, for example. A white arrow Af1 indicates the airflow of the inflowing air that passes through the upper part of the front heat exchanger 101 from the front side toward the rear side. The white arrow At indicates the airflow of the inflowing air passing through the top portion Pt of the indoor heat exchanger 10 from the upper surface side toward the lower surface side. A white arrow Ar indicates an air flow of the inflowing air passing through the rear heat exchanger 102 from the rear surface side toward the front surface side.

  The top portion Pt of the indoor heat exchanger 10 is a place where the arrangement direction of the flat tubes 16 is changed because the front heat exchanger 101 and the rear heat exchanger 102 are arranged in a substantially “Λ” shape and joined. ing. That is, the top portion Pt of the indoor heat exchanger 10 is a place where the arrangement direction of the flat tubes 16a and 16b of the front heat exchanger 101 and the flat tubes 16c and 16d of the rear heat exchanger 102 changes. Therefore, at the top portion Pt, the flat tubes 16a and 16b and the flat tubes 16c and 16d are arranged in such a relationship that the distance between the flat tubes 16a and 16b and the flat tubes 16c and 16d is widened on the windward side. Thereby, in the top part Pt, it arrange | positions in the uppermost position between the adjacent flat tubes 16b and the flat tubes 16c (specifically, among the many flat tubes 16b and the many flat tubes 16c. A gap larger than the arrangement pitch of the flat tubes 16 is generated between the uppermost flat tube 16b1 and the flat tube 16c1.

  In the conventional indoor unit, the protrusion 17t is not provided on the top Pt of the indoor heat exchanger 10. Therefore, the conventional indoor unit could not diffuse the inflow air flow (see the white arrow At) passing through the top Pt from the upper surface side toward the lower surface side. In the conventional indoor unit, since there is a gap between the uppermost flat tube 16b1 and the flat tube 16c1, the air ventilation resistance is reduced at the top portion Pt, and the wind speed of the inflow air is higher at the top portion Pt than at other locations. It was getting faster. Moreover, the width L1 of the top portion Pt is shorter than the width W1 of the front heat exchanger 101 and the width W2 of the rear heat exchanger 102. Therefore, the inflow air has passed through the top Pt in a shorter time than other parts. As a result, the conventional indoor unit has a variation in the wind speed distribution of the indoor heat exchanger 10. And in the top part Pt, there exists a possibility that inflow air may pass, without fully contacting the flat tubes 16b1 and 16c1 of the uppermost part. That is, the inflowing air may pass through without sufficiently exchanging heat with the refrigerant flowing in the uppermost flat tubes 16b1 and 16c1. Therefore, the conventional indoor unit has a possibility that the heat exchange efficiency is lowered.

  On the other hand, the indoor unit 2 according to the present embodiment is provided with a protrusion 17t on the top Pt of the indoor heat exchanger 10. Therefore, the indoor unit 2 can diffuse the airflow of the inflowing air (see the white arrow At) passing through the top portion Pt from the upper surface side toward the lower surface side around the protrusion portion 17t.

  Such an indoor unit 2 is configured so that the inflow air does not pass through the indoor heat exchanger 10 without sufficiently exchanging heat with the refrigerant flowing in the uppermost flat tubes 16b1 and 16c1. Can be guided toward the uppermost flat tubes 16b1 and 16c1. Moreover, the indoor unit 2 can reduce the wind speed of the inflowing air at the top portion Pt so that the inflowing air does not pass through the top portion Pt in a shorter time than other portions by applying the inflowing air to the protrusions 17t. . That is, the indoor unit 2 can make the air ventilation resistance of the entire indoor heat exchanger 10 uniform. As a result, the indoor unit 2 can reduce variation in the wind speed distribution of the indoor heat exchanger 10. Such an indoor unit 2 can improve heat exchange efficiency, and can obtain high heat exchange efficiency with less power consumption. As a result, the indoor unit 2 can realize the air conditioner 1 having excellent energy saving performance.

Moreover, the indoor unit 2 can also obtain the following effects by providing the protrusion 17t at the top Pt1 of the front heat exchanger 101.
For example, suppose that the front heat exchanger 101 is not provided with the protrusion 17t. In other words, it is assumed that the front heat exchanger 101 has a configuration in which the protrusion 17t is excluded from the configuration illustrated in FIG. Then, it is assumed that the wind speed distribution of the indoor heat exchanger 10 is made uniform using the front heat exchanger 101 having this configuration. Then, in the front side heat exchanger 101 having this configuration, the flat tubes 16b1 and 16c1 of the top portion Pt1 protrude from the fins 15b and 15c. Here, it is assumed that the portions where the flat tubes 16b1 and 16c1 protrude are covered with the fins 15a and 15d adjacent to the fins 15b and 15c. Then, the clearance gap between the top part Pt1 of the front side heat exchanger 101 and the upper surface filter 9a will become narrow. As a result, there is a possibility that the top portion Pt1 of the front heat exchanger 101 may come into contact with the upper surface filter 9a due to variations in assembling and manufacturing. If the top portion Pt1 of the front heat exchanger 101 is in contact with the upper surface filter 9a, the condensed water generated by condensation on the indoor heat exchanger 10 adheres to the upper surface filter 9a from the indoor heat exchanger 10, As a result, problems such as dripping may occur.

  On the other hand, the indoor unit 2 according to the present embodiment includes a protrusion 17t at the top Pt1 of the front heat exchanger 101. Therefore, the indoor unit 2 according to the present embodiment makes the wind speed distribution of the indoor heat exchanger 10 uniform by the protrusions 17t without the configuration in which the flat tubes 16b1 and 16c1 of the top portion Pt1 protrude from the fins 15b and 15c. Can be made. As a result, the indoor unit 2 according to the present embodiment can suppress the condensed water generated in the indoor heat exchanger 10 from adhering to the upper filter 9a from the indoor heat exchanger 10. Therefore, the indoor unit 2 according to the present embodiment can suppress the occurrence of a phenomenon such as water dripping.

  As shown in FIGS. 2 and 5, the front heat exchanger 101 of the indoor unit 2 has its substantially central portion bent as a bent portion Pf so as to be orthogonal to the air flow flowing toward the blower 8 as much as possible. It has a shape. The bent portion Pf is not a portion where the front heat exchanger 101 and the rear heat exchanger 102 are joined like the top portion Pt of the indoor heat exchanger 10, but a portion constituted by a single unit of the front heat exchanger 101. It has become. Therefore, the indoor unit 2 configures the front heat exchanger 101 so that the width L2 (see FIG. 5) of the bent portion Pf of the front heat exchanger 101 is longer than the width W1 (see FIG. 5) of other portions. can do.

  As shown in FIG. 5, in the indoor unit 2, the inflow air passes through the front heat exchanger 101 along the air flow indicated by the white arrows Af, Af 1, Af 2, for example. A white arrow Af indicates the airflow of the inflowing air that passes through the bent portion Pf of the front heat exchanger 101 from the front side toward the rear side. The white arrow Af1 indicates the airflow of the inflowing air that passes through the upper part of the front heat exchanger 101 from the front side toward the rear side. A white arrow Af2 indicates the airflow of the inflowing air that passes through the lower part of the front heat exchanger 101 from the front side toward the rear side.

  As shown in FIG. 4, the width L1 of the top portion Pt of the indoor heat exchanger 10 is very short compared to the widths W1 and W2 of other portions. Therefore, the inflowing air flowing along the air flow At passes through the top portion Pt in a much shorter time than other parts. On the other hand, as shown in FIG. 5, the width L2 of the bent portion Pf of the front heat exchanger 101 is a length that does not change much compared to the width W1 of other portions. Therefore, the inflowing air that flows along the airflow Af passes through the bent portion Pf in a time that is not much different from other parts.

  However, the bent portion Pf of the front heat exchanger 101 is a place where the arrangement direction of the flat tubes 16 changes between the upper side and the lower side. That is, the bent portion Pf of the front heat exchanger 101 is a place where the arrangement direction of the upper flat tube 16a1 and the lower flat tube 16a2 changes. Therefore, in the bent part Pf, the flat tube 16a1 and the flat tube 16a2 are arranged so that the distance between the flat tube 16a1 and the flat tube 16a2 is widened on the windward side and the space between each other is narrowed on the leeward side. Thereby, in the bending part Pf, it arrange | positions closest to the bending part Pf in the approximate center part of the exchanger 101a between two adjacent flat tubes 16a (specifically, among many flat tubes 16a. A gap larger than the arrangement pitch of the flat tubes 16 is formed between the flat tube 16a1 and the flat tube 16a2 in the substantially central portion.

  In the conventional indoor unit, the protruding portion 17 f is not provided on the bent portion Pf of the front heat exchanger 101. Therefore, the conventional indoor unit cannot diffuse the airflow of the inflowing air (see the white arrow Af) passing through the bent portion Pf from the front side toward the rear side. And since the conventional indoor unit has a gap between the flat tube 16a1 and the flat tube 16a2 at the substantially central portion, the air ventilation resistance becomes smaller at the bent portion Pf, and the inflow air at the bent portion Pf than other portions. The wind speed was getting faster. As a result, the conventional indoor unit also has a variation in the wind speed distribution of the indoor heat exchanger 10 due to this. Then, in the bent portion Pf, there is a possibility that the inflowing air may pass through the flat tube 16a1 and the flat tube 16a2 at the substantially central portion without sufficiently contacting. That is, there is a possibility that the inflowing air may pass through without sufficiently exchanging heat between the flat tube 16a1 and the refrigerant flowing through the flat tube 16a2 in the substantially central portion. Therefore, the conventional indoor unit may also reduce the heat exchange efficiency.

  On the other hand, in the indoor unit 2 according to the present embodiment, the protrusion 17f is provided on the bent portion Pf of the front heat exchanger 101. Therefore, the indoor unit 2 can diffuse the airflow of the inflowing air (see the white arrow Af) passing through the bent portion Pf of the front heat exchanger 101 from the front side toward the rear side around the protrusion 17f. it can.

  Such an indoor unit 2 has an inflow so that the inflow air does not pass through the indoor heat exchanger 10 without sufficiently exchanging heat with the refrigerant flowing through the flat tubes 16a1 and 16a2 in the substantially central portion. Air can be guided toward the flat tubes 16a1 and 16a2 at the substantially central portion. In addition, the indoor unit 2 reduces the wind speed of the inflowing air at the bent portion Pf so that the inflowing air does not pass through the bent portion Pf in a shorter time than other portions by applying the inflowing air to the protrusion 17f. Can do. That is, the indoor unit 2 can make the air ventilation resistance of the entire indoor heat exchanger 10 uniform. As a result, the indoor unit 2 can also reduce variation in the wind speed distribution of the indoor heat exchanger 10. Such an indoor unit 2 can improve heat exchange efficiency, and can obtain high heat exchange efficiency with less power consumption. As a result, the indoor unit 2 can realize the air conditioner 1 having excellent energy saving performance.

  As shown in FIGS. 4 and 5, pilot holes 18 are formed in the protrusions 17 t and 17 f as through holes penetrating in the left-right direction. In the present embodiment, the pilot hole 18 is used, for example, when the fin 15 is collected and processed by a robot arm or the like. Since indoor unit 2 can process fin 15 using pilot hole 18 provided in projection parts 17t and 17f at the time of manufacture, indoor heat exchanger 10 can be easily assembled and manufactured.

  As shown in FIG. 4, in this embodiment, the angle (inner angle) α between the upper portion of the front heat exchanger 101 and the vertical direction is set to be less than 40 ° (α <40 °). Further, the angle (inner angle) β between the upper portion of the rear heat exchanger 102 and the vertical direction is also set to less than 40 ° (β <40 °). Therefore, the indoor unit 2 uses the front dew tray 13a (see FIG. 2) and the rear dew tray 13b (see FIG. 2) for the condensed water that is condensed and dropped on the front heat exchanger 101 and the rear heat exchanger 102. And can be guided reliably.

  As shown in FIG. 6, in the present embodiment, a protrusion 17t is disposed on the top Pt of the front indoor heat exchanger 101 at a distance Wt from the front end with respect to the width W in the depth direction. In addition, a protrusion 17f is disposed at the bent portion Pf of the front indoor heat exchanger 101 at a distance Wf from the front end with respect to the width W in the depth direction. The protrusion 17f of the bent portion Pf of the front heat exchanger 101 is disposed at a position on the windward side of the intermediate position in the width W in the depth direction of the front heat exchanger 101. Thereby, since the indoor unit 2 can efficiently apply the inflow air to the flat tubes 16a1 and 16a2 (see FIG. 5) at the substantially central portion, high heat exchange efficiency can be obtained.

  The front indoor heat exchanger 101 is configured by a pair of exchangers 101a and 101b. The fins 15a constituting the main part of the exchanger 101a and the fins 15b constituting the main part of the exchanger 101b have shapes that can be brought into contact with each other inside and outside. As shown in FIG. 7, such a front indoor heat exchanger 101 can produce a large number of fins 15 a and fins 15 b used in the front heat exchanger 101 from a single plate member 100. At that time, since the fins 15a and the fins 15b are in close contact with each other, they can be manufactured with almost no unnecessary end material. Although not shown, a large number of fins 15c and fins 15d used in the rear heat exchanger 102 can be similarly manufactured from one plate member 100.

<Main features of indoor unit>
(1) As shown in FIG. 2, the indoor unit 2 according to the present embodiment is formed with suction ports 6a and 6b for sucking room air through the filters 9a and 9b and a blowing port 7 for blowing air into the room. A housing 5, a blower 8 disposed inside the housing 5, and an indoor heat exchanger 10 disposed so as to surround the blower 8 at a position between the suction ports 6 a and 6 b and the blower 8. I have. The indoor heat exchanger 10 includes a front heat exchanger 101 disposed in front of the blower 8 and a rear heat exchanger 102 disposed in the rear of the front heat exchanger 101. The top portion Pt1 of the front heat exchanger 101 is provided with a protrusion 17t for diffusing room air sucked from the suction port 6a to the surroundings.

  Such an indoor unit 2 can reliably apply the inflow air to the uppermost flat tubes 16b1 and 16c1 (see FIG. 4) and can reduce variations in the wind speed distribution of the indoor heat exchanger 10. High heat exchange efficiency can be obtained.

  (2) As shown in FIG. 2, the front heat exchanger 101 has a size that surrounds the front of the blower 8 as a single unit, and has a shape in which a substantially central portion is bent as a bent portion Pf. The bent portion Pf is provided with a projection 17f for diffusing room air sucked from the suction port 6b to the surroundings.

  Such an indoor unit 2 can reliably apply the inflow air to the flat tubes 16a1 and 16a2 (see FIG. 5) in the substantially central portion, and can reduce variations in the wind speed distribution of the indoor heat exchanger 10. Therefore, high heat exchange efficiency can be obtained.

  (3) As shown in FIG. 2, the top surface of the top portion Pt of the indoor heat exchanger has a substantially linear shape so as to be in a substantially parallel arrangement relationship with the top surface filter 9a.

  Such an indoor unit 2 can be provided with a protrusion 17t on the top Pt of the indoor heat exchanger 10. Moreover, the indoor unit 2 suppresses the condensed water generated in the indoor heat exchanger 10 from adhering to the upper surface filter 9a by providing the protrusion 17t on the top portion Pt1 of the front heat exchanger 101. Therefore, occurrence of a phenomenon such as dripping can be suppressed. Further, the indoor unit 2 may prevent the top filter 9a from being damaged by the top Pt of the indoor heat exchanger 10 even if the top Pt of the indoor heat exchanger 10 contacts the top filter 9a. it can.

  (4) As shown in FIG. 2, the outer wall portion O101a and the inner wall portion I101b of the front heat exchanger 101 are formed substantially in parallel. Further, the outer wall portion O102b and the inner wall portion I102a of the rear heat exchanger 102 are formed substantially in parallel.

  As shown in FIG. 7, such an indoor unit 2 can manufacture a large number of fins 15 a and fins 15 b used in the front heat exchanger 101 from a single plate member 100. At that time, since the fins 15a and the fins 15b are in close contact with each other, they can be manufactured with almost no unnecessary end material. Similarly, a large number of fins 15 c and fins 15 d used for the rear heat exchanger 102 can be manufactured from one plate member 100.

(5) As shown in FIGS. 4 and 5, pilot holes 18 are formed inside the protrusions 17 t and 17 f.
Since the indoor unit 2 can process the fins 15 using the pilot holes 18 provided in the protrusions 17t and 17f at the time of manufacture, the indoor unit 2 can be easily used in the indoor unit 2. Can be assembled and manufactured.

(6) As shown in FIG. 6, the protrusion 17 f of the bent portion Pf of the front heat exchanger 101 is arranged at a position on the windward side of the intermediate position in the width W in the depth direction of the front heat exchanger 101. Yes.
Such an indoor unit 2 can efficiently apply the inflow air to the flat tubes 16a1 and 16a2 (see FIG. 5) in the substantially central portion, so that high heat exchange efficiency can be obtained.

(7) As shown in FIG. 6, the protrusion 17t of the top portion Pt of the front heat exchanger 101 and the protrusion 17f of the bent portion Pf are shifted from the width W of the front heat exchanger 101 in the depth direction. It is arranged at Wt.
Since such an indoor unit 2 can efficiently apply inflow air to the uppermost flat tubes 16b1 and 16c1 (see FIG. 4) and the flat tubes 16a1 and 16a2 (see FIG. 5) in the substantially central portion, it is high. Heat exchange efficiency can be obtained.

  As described above, according to the indoor unit 2 of the air conditioner 1 according to the present embodiment, variation in the wind speed distribution of the indoor heat exchanger 10 can be reduced.

  The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  Moreover, the indoor unit 2 can be deformed as shown in FIG. FIG. 8 is an internal configuration diagram of an indoor unit 2A according to a modification. As shown in FIG. 8, in the indoor unit 2A, the upper surface of the exchanger 101b of the front heat exchanger 101 is replaced with the rear heat exchanger 102 in comparison with the indoor unit 2 (see FIG. 4) according to the above-described embodiment. The protrusion 17t is provided not on the top Pt1 of the front heat exchanger 101 but on the top Pt2 of the exchanger 102a of the rear heat exchanger 102. It is different in point. Similar to the indoor unit 2 (see FIG. 4) according to the above-described embodiment, the indoor unit 2A according to such a modification can reduce variation in the wind speed distribution of the indoor heat exchanger 10.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2,2A Indoor unit 3 Outdoor unit 4 Connection piping 5 Case 6 Suction port 7 Outlet 8 Blower 9a Top surface filter 9b Front filter 10 Indoor heat exchanger 11 Cosmetic frame 12 Front panel 13a Front dew tray 13b Rear side Dew tray 14 Vertical wind direction plate 15 (15a, 15b, 15c, 15d) Fin (heat exchange plate)
16 (16a, 16a1, 16a2, 16b, 16c, 16d) Refrigerant tube (flat tube)
116a Refrigerant tube partition 116b Refrigerant flow path 17 (17f, 17t) Protrusion 18 Pilot hole (through hole)
100 Plate material 101 Front heat exchanger 102 Rear heat exchanger 101a, 101b, 102a, 102b Exchanger I101a, I101b, I102a, I102b Inner wall portion L1, Wf, Wt Distance O101a, O101b, O102a, O102b Outer wall portion Pf Bending portion Pt1 , Pt2 Top W Width in the depth direction of the front heat exchanger W1 Width of the front heat exchanger W2 Width of the rear heat exchanger α Angle between the upper part of the front heat exchanger and the vertical direction (inner angle)
β Angle between the upper part of the rear heat exchanger and the vertical direction (inner angle)

Claims (9)

A housing formed with a suction port for sucking room air through the filter and a blow-out port for blowing air into the room;
A blower disposed inside the housing;
An indoor heat exchanger disposed so as to surround the blower at a position between the suction port and the blower,
The indoor heat exchanger has a front heat exchanger disposed in front of the blower and a rear heat exchanger disposed rearward of the front heat exchanger,
An indoor unit of an air conditioner, wherein a protrusion is provided on the top of the front heat exchanger or the top of the rear heat exchanger. A housing formed with a suction port for sucking room air through the filter and a blow-out port for blowing air into the room;
A blower disposed inside the housing;
An indoor heat exchanger disposed so as to surround the blower at a position between the suction port and the blower,
The indoor heat exchanger has a front heat exchanger disposed in front of the blower and a rear heat exchanger disposed rearward of the front heat exchanger,
The front heat exchanger has a size that surrounds the front of the blower as a single unit, and has a shape in which a substantially central portion is bent as a bent portion,
An indoor unit of an air conditioner, wherein the bent portion is provided with a protrusion. In the indoor unit of the air conditioner according to claim 1 or 2,
The indoor unit of an air conditioner, wherein the protrusion diffuses indoor air sucked from the suction port. In the indoor unit of the air conditioner according to any one of claims 1 to 3,
In each of the front heat exchanger and the rear heat exchanger, a plurality of flat tubes are arranged in parallel as refrigerant tubes for flowing the refrigerant,
The indoor unit of an air conditioner, wherein the protrusion is provided at a location where the arrangement direction of the flat tube changes. In the indoor unit of the air conditioner according to any one of claims 1 to 4,
The top surface of the indoor heat exchanger has a substantially linear shape so that the top surface of the indoor heat exchanger is substantially parallel to a top filter disposed on the top surface of the housing. The indoor unit of the harmony machine. In the indoor unit of the air conditioner according to claim 5,
The outer wall portion and the inner wall portion of the front heat exchanger are formed substantially in parallel,
An indoor unit of an air conditioner, wherein an outer wall portion and an inner wall portion of the rear heat exchanger are formed substantially in parallel. In the indoor unit of the air conditioner according to any one of claims 1 to 6,
An indoor unit of an air conditioner, wherein a hole is formed inside the protrusion. The indoor unit of the air conditioner according to claim 2,
The air conditioner indoor unit, wherein the protruding portion of the bent portion is disposed at a position on the windward side of the intermediate position in the width in the depth direction of the front heat exchanger. In the indoor unit of the air conditioner according to any one of claims 1 to 8,
The front heat exchanger includes at least one or more protrusions on each of a top portion and a bent portion,
The indoor unit of an air conditioner, wherein the projection part of the top part and the projection part of the bent part are arranged at positions shifted with respect to the width in the depth direction of the front heat exchanger.

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