WO2017022072A1 - Indoor unit for air conditioning - Google Patents

Abstract

There is a demand for an indoor unit for air conditioning, the indoor unit being capable of reliably conducting condensate water to a drain pan without causing the condensate water to leak to the outside of the unit, the condensate water being that which has splashed from a heat exchanger and adhered to supports and the inner wall surface of panel bodies. This indoor unit for air conditioning is configured as follows: a box-shaped body is formed so as to comprise a base peripheral frame, supports raised from the upper side of the base peripheral frame, and panel bodies; the box-shaped body has arranged therein a heat exchanger, a drain pan, and a blower; inner peripheral plate sections extend from the upper sides of the base peripheral frame toward the inside thereof; hanging plate sections are provided to the inward facing front ends of the inner peripheral plate sections; the supports are raised from the inner peripheral plate sections at positions inside the base peripheral frame; and the drain pan is disposed so that the upper face opening edges of the drain pan will be located between and at a distance from the base peripheral frame and the hanging plate sections and below and at a distance from the inner peripheral plate sections.

Description

Indoor unit for air conditioning

The present invention relates to a floor-standing air conditioning indoor unit that is installed in an air-conditioned room and performs cooling and heating. More specifically, the present invention relates to an air conditioning indoor unit that can improve the water leakage resistance of a drain pan.

Conventionally, an air conditioner indoor unit of an air conditioner that is installed in an air-conditioned room for cooling or heating includes a frame, four columns installed at four corners of the frame, and between the columns and the top surface. A box-shaped main body configured from a panel body provided in the opening is provided. In the box-shaped main body, a heat exchanger of a refrigerant circuit, a blower, and a drain pan that receives condensed water from the heat exchanger are arranged. The drain pan prevents water from leaking outside the apparatus even when condensed water or the like falls in the lower part of the box-shaped main body. And the indoor unit for air conditioning installed on the floor blows out the cooling air cooled with the heat exchanger from the upper surface of a box-shaped main body, and makes the inside of an air-conditioned space comfortable.
By the way, the said drain pan needs the structure which does not leak the condensed water which arose on the outer surface of the heat exchanger outside the apparatus. In addition, a structure in which the drain pan can be replaced in the case where the paint peels off due to aging of the drain pan is required. Furthermore, the drainage direction of the condensed water in the drain pan is desired to be able to drain from either the left or right side of the air conditioning indoor unit.

In such a conventional air conditioning indoor unit, the drain pan is installed on the upper part of the underframe, and the drain pan is fixed in contact with the inner peripheral surface of the support column. In order to prevent the condensed water adhering to the panel body and the condensed water falling along the column from leaking out of the apparatus, a frame is installed at the lowermost end of the column. In other words, the support column is erected on a frame located below the drain pan. In addition, the front end of the panel body is bent into the drain pan in order to guide the condensed water adhering to the inner surfaces of the columns and the panel body to the drain pan.

JP 2009-243799 A JP 2013-19631 A

By the way, the indoor unit for air conditioning described in Patent Document 1 and Patent Document 2 described above has a structure in which the drain pan and the base frame are integrally formed by welding, so that the drain pan cannot be replaced. Moreover, since the drainage direction of the condensed water is determined by the structure of the drain pan, there is a problem that the drainage direction cannot be changed according to the local situation. Further, in the conventional configuration, the condensed water from the heat exchanger may enter between the panel body and the support column, get on the edge of the underframe, and leak out of the machine.

The present invention has been made to solve the above-described problems. The condensed water scattered from the heat exchanger and adhering to the inner wall surface of the column and the panel body is reliably transferred to the drain pan without leaking outside the apparatus. It aims at obtaining the indoor unit for air conditioning which can be led.

An indoor unit for air conditioning according to the present invention comprises a box-shaped frame including a base frame, at least three support columns standing above the base frame, and a panel body provided between the columns. A main body is configured, and a box-shaped main body includes a heat exchanger that constitutes a part of the refrigerant circuit, a drain pan that opens an upper surface that receives condensed water from the heat exchanger, and a blower that blows air to the heat exchanger And an inner peripheral plate portion extending inward from the upper side of the base peripheral frame is provided over the entire circumference of the upper side portion, and downward on the inward tip of the inner peripheral plate portion. An extending drooping plate portion is provided, a support column is erected on the inner circumferential plate portion at an inward position of the base frame, and an upper opening edge of the drain pan is disposed between the droop plate portion and the base frame. The drain pan is arranged so as to be at a position spaced apart from each other and at a position below the inner circumferential plate portion and separated from the inner circumferential plate portion. Than is.

The indoor unit for air conditioning according to the present invention has an inner peripheral plate portion and a hanging plate portion whose base frame is inclined inward, and since each support column is erected at the inner position of the base peripheral frame, Even if condensed water scatters from the heat exchanger due to the wind from the blower and adheres to the inner wall of the column or panel body, the condensate is dropped onto the inclined inner peripheral plate without leaking outside the machine. It can be reliably guided from the section into the drain pan.

It is a perspective view shown in the state where the front panel body of the indoor unit for air conditioning in Embodiment 1 of this invention was removed. 2A and 2B are views showing a frame and a drain pan of the air conditioning indoor unit, where FIG. 2A is a plan view and FIG. 2B is a cross-sectional view taken along line AA in FIG. It is a disassembled perspective view which shows the state which decomposed | disassembled the component part of the said frame and drain pan. It is a partial expansion perspective view which shows a part of said base frame, and a column support member. It is a figure which shows the said drain pan, Comprising: (a) is a perspective view, (b) is a partial expansion perspective view. It is a partial expanded longitudinal cross-sectional view which shows the principal part of the said frame and a drain pan. FIG. 3 is a view showing a drain pan arranged horizontally with the frame, wherein (a) is a front sectional view and (b) is a view taken along line BB in (a). It is a figure which shows the drain pan after giving the said base frame and a gradient, Comprising: (a) is a front sectional view, (b) is a BB arrow directional view in (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a perspective view showing a state in which a front panel body of an air conditioning indoor unit according to Embodiment 1 of the present invention is removed, and FIG. 2 is a view showing a frame and a drain pan of the air conditioning indoor unit. ) Is a plan view, (b) is a cross-sectional view taken along line AA in (a), FIG. 3 is an exploded perspective view showing a state in which the components of the frame and drain pan are disassembled, and FIG. It is a partial expansion perspective view which shows a part and column support member.
In each figure, the indoor unit for air conditioning which concerns on this embodiment is provided with the box-shaped main body 5 by which the inside becomes a ventilation path. The box-shaped main body 5 has an air inlet 20 on the front surface and an air outlet 21 on the upper surface. The box-shaped main body 5 includes a frame 15 placed on the floor surface, four support columns 12, 12, 12, 12 arranged at the four corners of the base frame 15 c in the frame 15, Left and right panel bodies 6, 7 provided between the columns 12, 12, front and rear panel bodies (not shown) provided between the left and right columns 12, 12, and a top panel body 8 covering the upper surface And is composed of.

The air outlet 21 is formed in the top panel body 8, and the air suction port 20 is formed in a front panel body (not shown) that covers the front of the heat exchanger 11. In the box-shaped main body 5, a heat exchanger 11 constituting a part of the refrigerant circuit, and a drain pan formed with an upper surface opened to receive the condensed water dropped on the outer surface of the heat exchanger 11. 14, a blower 9 for blowing air to the heat exchanger 11, and a motor 10 for driving the blower 9 are provided. In FIG. 1, reference numeral 13 denotes a control product box containing various control components, and reference numeral 16 denotes a refrigerant pipe of a refrigerant circuit connected to the heat exchanger 11.

The underframe 15 includes a base peripheral frame 15c made of a sheet metal on all sides and formed in a rectangular shape in plan view. The upper peripheral portion 15d of the base peripheral frame 15c is provided with an inner peripheral plate portion 15a extending inwardly in the frame over the entire periphery of the upper side portion 15d. A drooping plate portion 15b extending downward is provided at the inward tip portion 15e of the inner peripheral plate portion 15a. The inner peripheral plate portion 15a is formed with a gradient that falls inward in the frame. And the mounting surface part 17a of the column support member 17 supported on the inner peripheral board part 15a is formed with the same gradient as the inner peripheral board part 15a. With such a structure, each column 12 is erected in a vertical posture.

The column support member 17 is formed in an L shape in a plan view and a Z shape in a side view, and a mounting surface portion 17a that is mounted and supported on the inner peripheral plate portion 15a of the underframe 15; A support portion 17c extending vertically upward from the inclined lower end portion of the mounting surface portion 17a and fixing and supporting the column 12 with a screw or the like; and a frame 15 extending vertically downward from the inclined upper end portion of the mounting surface portion 17a. And a base plate portion 17d joined to the base peripheral frame 15c by welding or the like. The support portion 17c and the saddle plate portion 17d are arranged in a substantially parallel direction. The inclination angle of the mounting surface portion 17a with respect to the support portion 17c or the flange plate portion 17d is the same as the inclination angle of the inner peripheral plate portion 15a with respect to the base peripheral frame 15c. Each support column 12 is erected at a position inward of the base peripheral frame 15c via a column support member 17 attached on the inner peripheral plate portion 15a. When the column support member 17 is screwed to the support portion 17 c, the lower end surface of each column 12 is installed on the inner peripheral plate portion 15 a of the frame 15.
A through hole 17b is formed through the inside and outside at the lower end position of the inner corner of the support portion 17c. By providing such a through hole 17b, even when the condensed water from the heat exchanger 11 reaches the inner corner of the column support member 17, the condensed water does not accumulate there, and avoids the through hole 17b. Alternatively, after passing through the through hole 17b and reaching the inner peripheral plate portion 15a in the vicinity of the upper side portion 15d, it can flow down and be guided into the drain pan 14.

As shown in FIG. 5, the drain pan 14 is formed in the shape of a square dish, and drainage ports 26 are provided on the left and right bottoms. A pair of fixing metal plates 18, 18 constituting a part of the drain pan 4 are attached to the left and right sides of the drain pan 14 in order to fasten with the base peripheral frame 15 c. In addition, square hole-shaped heat transfer suppression holes 18 a and 18 a are formed through the upper and lower opening edge portions 14 a in the vicinity of the female screw portion 23 in each fixing sheet metal 18 so as to penetrate vertically. The fixing metal plate 18 and the inner wall 15f of the base peripheral frame 15c are fixed by point contact or line contact, not by surface contact, using a stepped screw 24. These serve the purpose of suppressing heat transfer. That is, by suppressing the conduction of cold heat from the drain pan 14 cooled by the condensed water of the heat exchanger 11, condensation on the surface of the base peripheral frame 15c connected by the stepped screw 24 is prevented.

Further, as shown in FIG. 6, the drain pan 14 has an upper surface opening edge portion 14 a at a position spaced apart from the hanging plate portion 15 b of the base frame 15 and the base peripheral frame 15 c with a gap S <b> 1 therebetween. And it arrange | positions so that it may exist in the position spaced apart from the lower surface below the lower surface of the inner peripheral board part 15a of the base frame 15 with the clearance gap S2. The upper surface opening edge portion 14a of the drain pan 14 is disposed with a gap S1 of 3 to 7 mm between it and the hanging plate portion 15b. When the gap S1 is less than 3 mm, the drooping plate portion 15b may remain in contact interference with the drooping plate portion 15 when the drain pan 14 is attached, or the dripping plate portion 15b may be easily subjected to heat transfer from the drain pan 14. On the other hand, if the gap S1 exceeds 7 mm, the entire frame 15 becomes too large, and there is a possibility that the material cost and other manufacturing costs increase. Further, the upper surface opening edge portion 14a of the drain pan 14 is arranged with a gap S2 of 2 to 5 mm between the lower surface of the inner peripheral plate portion 15a. Also here, when the gap S2 is less than 2 mm, the interference with the inner peripheral plate portion 15a remains at the time of attachment, or the vertical inner peripheral plate portion 15a is likely to receive heat transfer from the drain pan 14. When the gap S2 exceeds 5 mm, the entire frame 15 becomes too large.

The drain pan 14 is installed in the base peripheral frame 15 c with the gradient degree θ in the left-right direction made variable by the action of the gradient variable mechanism 25. The gradient varying mechanism 25 includes, for example, a pair of front and rear positioning holes 22A and 22A formed in the left and right base peripheral frames 15c and 15c of the base frame 15, and a pair of front and rear formed at positions below the positioning holes 22A and 22A. Positioning holes 22B, 22B, a pair of front and rear female screw portions 23, 23 formed in the fixing metal plate 18 at positions facing these positioning holes 22A, 22B, and positioning holes 22A or positioning holes in the base frame 15c And a stepped screw 24 that is inserted into 22B and screwed to the female screw portion 23 of the fixing metal plate 18.

After the drain pan 14 is screwed to the base peripheral frame 15 c, the condensed water of the heat exchanger 11 can be discharged from either the left or right side of the box-shaped main body 5 on site as shown in FIGS. First, remove the stepped screw 24 on the side (right side as viewed from the front in the illustrated example) of the drain pan 14 (see FIG. 7) in the horizontal posture from the positioning hole 22B. When the female screw portion 23 of the fixing metal plate 18 is screwed into the positioning hole 22A located at the upper position through the stepped screw 24, a gradient degree θ is applied so that the drain pan 14 on the right side portion becomes higher (see FIG. 8). ).

As described above, according to this indoor unit for air conditioning, the underframe 15 has the inner peripheral plate portion 15a and the hanging plate portion 15b inclined inward, and each column 12 is a column on the inner peripheral plate portion 15a. Since it is erected at the inner position of the base peripheral frame 15 c via the support member 17, the condensed water from the heat exchanger 11 is blown from the blower 9 to the inner wall surfaces of the columns 12 and the panel bodies 6 and 7. Even in the case of splashing, the condensed water can be dropped onto the inclined inner peripheral plate portion 15a and guided into the drain pan 14 from the drooping plate portion 15b.
Further, the drain pan 14 has a position in which the upper surface opening edge portion 14a is separated from the hanging plate portion 15b and the base peripheral frame 15c, and is located below the inner peripheral plate portion 15a and separated from the inner peripheral plate portion 15a. Therefore, it is possible to suppress the conduction of cold heat from the drain pan 14, thereby suppressing dew condensation on the outer surfaces of the columns 12, the panel bodies 6, 7, and the underframe 15.
And since the inner peripheral plate portion 15a of the underframe 15 is formed with a gradient that goes inwardly in the frame, the mounting surface portion 17a of the column support member 17 is also formed with the same gradient as the inner peripheral plate portion 15a. The column support member 17 can be firmly placed and supported on the inner peripheral plate portion 15a, and the verticality of each column 12 can be reliably maintained.

Further, the drain pan 14 is fixed to the inner wall 15f of the base peripheral frame 15c by a point contact or a line contact using a stepped screw 24, and the heat transfer suppression hole 18a is vertically connected to the upper surface opening edge portion 14a of the fixing sheet metal 18. Since it is formed so as to penetrate, it is possible to suppress conduction of cold heat from the drain pan 14 to the frame 15 as much as possible, thereby suppressing the occurrence of condensation on the surface of the frame 15.
Since the drain pan 14 is installed in the base peripheral frame 15c with the gradient degree θ in the left-right direction being variable by the action of the variable gradient mechanism 25, when the air conditioner indoor unit is installed on the site, Accordingly, the gradient degree θ of the drain pan 14 can be adjusted, and the condensed water in the drain pan 14 can be discharged from either the left or right side.

In the above-described embodiment, the rectangular box-shaped main body 5 and the four support columns 12 are illustrated in plan view, but the present invention is not limited thereto. For example, a box-shaped main body using a triangular box-shaped main body and three columns in a plan view, or a box-shaped main body using a pentagonal box-shaped main body and five or more columns in a plan view is also included in the present invention. Needless to say, it is included in

DESCRIPTION OF SYMBOLS 5 Box-shaped main body 6 Panel body 7 Panel body 8 Top panel body 9 Blower 11 Heat exchanger 12 Support | pillar 14 Drain pan 14a Upper surface opening edge part 15 Base frame 15a Inner peripheral board part 15b Hanging board part 15c Base peripheral frame 15d Upper side part 15e Inward tip portion 15f Inner wall 17 Column support member 17a Mounting surface portion 17b Through hole 17c Support portion 17d Edge plate portion 18 Sheet metal portion 18a Heat transfer suppression holes 22A and 22B Positioning hole 23 Female screw portion 24 Stepped screw 25 Gradient variable mechanism 26 Drain port θ Gradient degree S1 Gap S2 Gap

Claims (5)

1. A box-shaped body comprising a base peripheral frame, at least three support columns standing above the base peripheral frame, and a panel body provided between the support columns is configured, A heat exchanger constituting a part of the refrigerant circuit, a drain pan having an open top surface for receiving condensed water from the heat exchanger, and a blower for blowing air to the heat exchanger are provided in the main body. An inner peripheral plate portion extending inward from the upper side of the base peripheral frame is provided over the entire circumference of the upper side portion, and extends downward at the inward tip portion of the inner peripheral plate portion. A drooping plate portion is provided, the column is erected on the inner circumferential plate portion at an inward position of the base peripheral frame, and an upper opening edge of the drain pan is formed on the drooping plate portion and the base plate. Located at a position spaced apart from each other between the peripheral frames and at a position spaced apart from the inner peripheral plate portion below the inner peripheral plate portion. Sea urchin, air conditioning indoor unit, characterized in that said drain pan is arranged.
2. 2. The indoor unit for air conditioning according to claim 1, wherein the drain pan is installed in the base frame so that the gradient degree is variable.
3. The air-conditioning room according to claim 1 or 2, wherein a support column is erected at an inward position of the base peripheral frame via a column support member attached on the inner peripheral plate part. Machine.
4. The inner peripheral plate portion is formed with a gradient descending inward in the frame, and the mounting surface portion of the column support member supported on the inner peripheral plate portion is formed with the same gradient as the inner peripheral plate portion. The indoor unit for air conditioning of Claim 3 characterized by the above-mentioned.
5. The drain pan is fixed to the inner wall of the base peripheral frame by point contact or line contact, and a heat transfer suppression hole is formed through the top opening edge of the drain pan so as to penetrate vertically. The indoor unit for air conditioning as described in any one of Claim 4 to 5.

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