JPS61282734A - Air conditioning unit - Google Patents

Abstract

PURPOSE:To provide a positive seal between an outer circumferential surface and an inner circumferential surface of an outer frame as well as an outer circumferential surface of an outer wall and to prevent a leakage of air by a method wherein cooling air if flowed in air outlet passage and air discharging outlet and the outer frame is cooled and shrinked and closely contacted with the outer wall. CONSTITUTION:An air conditioning unit is fixed at its main body 1 to a rear part of the ceiling S of a room requiring an air conditioning operation. Then, it is fixed to the fixing part 15 of the main body 1 with an engaging fitting for the opening 2. In this case, the outer frame 221 of the opening 2 and the inner frame 211 are pushed upwardly to be engaged to each other at the outer circumferences of the outer wall 111 and the inner wall 12 of the main body 1. The outer wall 111 and the inner wall 12 are of solid material and in turn the outer frame 221 and the inner frame 211 are of a semi-solid material, so that in case of an engaging operation, the outer frame 221 and the inner frame 211 are deformed and a positive engagement between them can be assured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an air conditioning unit installed on the ceiling of a room or the like. The air conditioning unit of the present invention can be used in heating and cooling air conditioners.

[Prior Art] An air conditioning unit installed on the ceiling of a room is mainly composed of a main body provided above the ceiling and an opening provided below the ceiling.

In many cases, an air inlet is formed at the center of the opening, and an air outlet is formed at the outer periphery. In addition, the main body is equipped with a heat exchanger to heat or cool the air and a blower to flow the air.In conventional air conditioning units, both the main body and the opening are made of metal or hard plastic. It consisted of

[Problem 1 to be solved by the present invention] In a conventional air conditioning unit, both the main body and the opening were made of rigid bodies such as metal or hard plastic. For this reason, it is difficult to seal the joint between the main body and the opening, and the seal breaks and the cooled air flows out into the ceiling. Sometimes there were problems with water leaking from the back. Particularly when the air conditioning unit is large, it is difficult to seal the main body and the opening.

Means for Solving Problem E] The air conditioning unit of the present invention includes a housing that has a rigid cylindrical outer wall that extends downward and covers the top; An inner wall section with iJ installed,
A heat exchanger and a feed lit installed in the housing.
an air inlet passage surrounded by the inner wall;
A cylindrical semi-rigid foam body having an inner peripheral surface forming an air outlet passage between the inner wall and the outer wall, and an inner circumferential surface that is removable from the main body and abuts at least the outer circumferential surface of the outer wall. It has an outer frame made of polyurethane and an inner frame that is integrally formed with the outer frame and comes into contact with the inner wall, and an air inlet is provided inside the inner frame. and an opening that forms an air outlet between the air outlet passages and the air outlet, and when cooling air is flowed through the air outlet passage and the air outlet, the outer frame is cooled and contracted by the cooling air, and the outer frame is cooled and contracted. It is characterized in that the frame portion is brought into close contact with the outer wall portion.

The main body of the air conditioning unit of the present invention is basically the same as the main body of a conventional air conditioning unit. In addition,
Preferably, the downwardly opening rigid outer wall of the main body is cylindrical, more preferably cylindrical. In addition, this main body section has a -4= heat exchanger and a feeder ff1 like the conventional main body section, and also has an inner wall section that partitions an air inlet passage and an air outlet passage.

Note that the inner wall portion preferably has a cylindrical shape provided coaxially with the outer wall portion. Further, it is preferable that the main body portion has a fixing portion for holding the curved opening portion. This fixing part is preferably provided within the air inlet passage. Further, it is preferable that the housing constituting the main body portion is entirely made of a heat insulating member, or is covered with a heat insulating member.

The opening that characterizes the present invention has an outer frame portion and an inner frame portion. The outer frame must be made of semi-rigid polyurethane foam. The inner frame is also preferably made of semi-rigid polyurethane foam. Note that foamed polyurethane is divided into flexible foamed polyurethane, semi-rigid foamed polyurethane, and rigid foamed polyurethane. Soft polyurethane foam deforms freely in response to an external load, returns to its original shape when the load is removed, and has toughness. It is a rigid polyurethane foam. A hard version of flexible polyurethane foam is called semi-rigid polyurethane, and has a density of 0.03 to 0.
．． 5 (1/cnu), it is similar to flexible polyurethane foam in that it recovers to its original shape when the load is removed. The semi-rigid polyurethane foam of the present invention has a flexural modulus of elasticity of 2.0 to 2000 kO/am" ( Distance between fulcrums 100
3-point bending). Note that soft urethane having a lower bending modulus than the above has poor shape retention. Conversely, hard urethane with a higher elastic modulus has poor recovery properties. The outer frame of the opening has an inner peripheral surface that comes into contact with the outer peripheral surface of the outer wall of the main body. More preferably, an engagement groove is provided at the center of the open end of the outer frame. The side surface of the engagement groove on the outer peripheral surface side corresponds to the inner peripheral surface of the present invention. The lower end of the outer wall of the main body is inserted into and engaged with this engagement groove. The engagement groove is preferably deep enough to ensure sufficient engagement even if the relative distance between the main body and the opening changes slightly. During the opening, the thickness of the outer wall is 0°7~0.
．． About 9 times is good. It is preferable that the inner frame part has a shape similar to the outer frame part, such that it has an inner circumferential surface that comes into contact with the outer circumferential surface of the inner wall part. Further, it is preferable that the opening portion is provided with a mounting portion for attachment to the main body portion.

This attachment part is preferably provided within the air inlet. Note that the air discharge port may be provided with a wing portion such as an air guide vane. The overall shape of the outlet portion may be cylindrical or angular such as a square. It is preferable that the entire outlet portion be made of semi-rigid urethane foam. In addition, in the case of a large size, it is necessary to use a metal insert to ensure sufficient strength.

[Operations and Effects of the Invention] In the air conditioning unit of the present invention, the outer frame portion on the outlet side is made of semi-rigid polyurethane foam. For this reason, when cooled air flows through the air outlet and the air outlet passage, the outer frame is cooled by the cooled air. This cooling causes the outer frame made of semi-rigid polyurethane foam to shrink significantly. Due to this contraction, the outer frame portion strongly tightens the outer wall portion of the main body portion, and the outer circumferential surface and inner circumferential surface of the outer frame portion and the outer circumferential surface of the outer wall portion are uniformly and reliably sealed. Therefore, there is no possibility that the cooled air will leak out from the engagement surface between the main body and the opening. Note that when heated air flows through the air outlet passage and the air discharge port, the outer frame expands and opens, which may create a gap between the outer frame and the outer wall. Even if it flows out through the gap, it does not pose a particular problem. Note that an engagement groove is provided in the center of the upper end surface of the outer frame, and when the lower end surface of the outer wall is inserted and engaged with this engagement groove, cooled or heated air flows into the air outlet passage and the air discharge port. No matter which type of air is sent, the sealing properties between the outer wall and outer frame are maintained.
There is no risk of air leaking out.

Furthermore, since at least the outer frame portion of the opening of the air conditioning unit of the present invention is formed of semi-rigid polyurethane foam, it has sufficient shape retention and restorability. Therefore, it exhibits sufficient sealing properties even during long-term use. Also,
Semi-rigid polyurethane foam has strong water absorption (and has semi-continuous cells. Therefore, it can absorb a large amount of water that aggregates at the outlet.

Note that condensation of water vapor at the outlet occurs at the initial stage when uncooled air is sent to the cooled outlet.

In other words, when an air conditioning unit cools indoor air, the air temperature is controlled by either cooling the air with the air conditioning unit or letting the air flow without cooling. Water condensation tends to occur when switching from cooled air to regular air. That is, when uncooled air containing a large amount of water vapor comes into contact with the outlet section cooled by the cooling air, water condensation occurs. This condensed water is absorbed by the outlet part that constitutes the present invention. Note that when the outlet section is heated with air to a certain temperature, water stops condensing and, on the contrary, water evaporates. In this way, the outlet part has a breathing effect of absorbing water and dissipating it. Therefore, there is no inconvenience such as condensed water accumulating and falling into the room.

[Example] Representative examples of the air conditioning unit of the present invention are shown in FIGS. 1 to 5. FIG. 1 is an overall schematic sectional view of the air conditioning unit. 2 is a plan view of the opening, FIG. 3 is a side view of the opening, FIG. 4 is a sectional view of the center of the opening, and FIG. 5 is an enlarged sectional view of the end.

This air conditioning unit is composed of a main body part 1 and an opening part 2. The main body part 1 includes a housing 11 made of metal and having an opening at the lower end, an inner wall part 12 made of a composite material of styrofoam and a metal plate fixed to the lower end opening of the housing 11, and a space between the inner wall part 12 and the inner bottom surface of the housing 11. The heat exchanger 13, fan 141, and this fan 14 provided in
The air blower 14 is composed of an electric motor 142 that drives the air blower 14. Note that the outer peripheral end portion of the housing 11 constitutes the cylindrical outer wall portion 111 of the present invention. Further, a metal fixing part 15 is integrally attached to the inside of the inner wall part 12.

As seen in FIG. 4, the opening 2 is composed of a base 21 and an upper end 22 fixed to the base 21 with adhesive.

The base 21 has an inflow hole 21a in the center and discharge ports 21b that open along each of the four sides of the outer edge.
It has a square shape with a cylindrical inner frame portion 211 forming a through hole communicating with a.

As shown in FIGS. 2 and 5, this base 21 has a metal insert (not shown) on the inside thereof, and four inserts (not shown) that extend radially outward from the four corners of this insert. , Furthermore, there is a square-shaped 2 piece connecting the tips of each of these four inserts and the part slightly closer to the center than the tip.
It has a pair of inserts 222, 223 and is integrally formed of semi-rigid polyurethane foam. Note that a skin material made of vinyl chloride film is attached to the lower surface of the base 21. Also, engagement fittings 215 are integrally attached to each corner of the inner square insert.

The upper end part 22 has a square outer peripheral shape like the base part 21, and has an outer frame part 221 forming a circular opening in the center, and is made of semi-rigid polyurethane foam.

The upper end portion 22 is integrally joined to the upper side of the base portion 21 with an adhesive. And the inner frame part 211 and the upper end part 22 of the base part 21
The outer frame portion 221 constitutes the upper end portion of the discharge port 21b.

The semi-rigid polyurethane foam constituting the opening 2 of this example has a bulk density of 0.15o/cm3 and a tensile strength of 17,0
kq/cm2 (according to the regulations of J Is K6301), bending elastic modulus: 250 kQ/cm2 (distance between fulcrums 1
00mm, 3-point bending test), thermal conductivity: 0.03kca
l/mhr℃, recovery rate at 50% compression: 90% or more,
25% compression load: 3°OkQ/cm2.5Q% compression load near OkO/cm2.

The air conditioning unit of this embodiment has the above configuration.

This air conditioning unit has its main body 1 fixed to the back of the ceiling S of a room requiring air conditioning. At this time, it is necessary to install an air conditioning heat medium pipe (not shown) to be attached to the heat exchanger 13, a drain pipe (not shown) to dispose of condensed water, and electrical wiring work for power distribution. Next, the engaging fitting 215 of the opening 2
is used to fix it to the fixing part 15 of the main body part 1. At this time, the outer frame 221 and inner frame 211 of the opening 2 are pushed upward so as to engage with the outer circumferential sides of the outer wall 111 and inner wall 12 of the main body 1 . In addition, the outer wall portion 111 and the inner wall portion 1
2 is a rigid body, whereas the outer frame portion 221 and the inner frame portion 211 are semi-rigid, so the outer frame portion 221
Then, the inner frame portion 211 is deformed and engaged securely. Also,
Since the opening 2 is made of polyurethane foam, it is lightweight;
In the case of this embodiment, the opening 2 has a length, width, and height of 8.
Despite being large, measuring 5 cm, 85 cm, and 11 CR+, its weight is only 7 kg.

Note that the outer frame portion of the opening in this embodiment can be configured as shown in FIG. Outer frame 321 of this opening 3
has a deep engagement groove 321a on its upper end surface. The other configurations of the opening 3 are the same as the configuration of the opening 2 in the embodiment.

The width of this groove 321a is slightly smaller than the thickness of the outer wall of the main body. When fixing the opening 3 to the main body, the outer wall of the main body is inserted into and engaged with the groove 321a of the outer frame 321 of the opening 3. In this case, the outer frame 321 and the outer wall are reliably sealed whether the outer frame 321 of the opening 3 is heated or cooled.

[Brief explanation of drawings]

Figures 1 to 5 show the air conditioning unit of this embodiment,
Figure 1 is a schematic sectional view of the entire structure, Figure 2 is a plan view of the opening, Figure 3 is a side view of the opening, Figure 4 is a sectional view of the center of the opening, and Figure 5 is an enlarged view of the end. FIG. FIG. 6 is an enlarged sectional view of the end of another modification. 1... Main body 2.3... Opening 221...
・Outer frame part 211... Inner frame part Patent applicant Tokai Kasei Kogyo Co., Ltd. Agent Patent attorney Hirodo Okawa Patent attorney Shudo Fujitani Patent attorney Akio Maruyama

Claims (4)

[Claims] (1) A housing that has a rigid cylindrical outer wall that opens downward and covers the top, an inner wall that is held by the housing and is provided inside the outer wall, and a heat sink that is provided within the housing. a main body having an exchanger and a blower, an air inlet passage formed inside the inner wall surrounded by the inner wall, and an air outlet passage between the inner wall and the outer wall; , a cylindrical semi-rigid polyurethane foam outer frame having an inner circumferential surface abutting at least the outer circumferential surface of the outer wall, and an inner frame integrally constructed with the outer frame and abutting the inner wall. The inner frame has an air inlet inside the inner frame and an opening between the inner frame and the outer frame that forms an air outlet, and the air outlet passage and the air outlet are provided with cooling. 1. An air conditioning unit characterized in that when air is caused to flow, the outer frame portion is cooled and contracted by the cooling air, so that the outer frame portion is brought into close contact with the outer wall portion. (2) The air conditioning unit according to claim 1, wherein the entire opening is mainly formed of semi-rigid foamed urethane. (3) The density of semi-rigid urethane foam is 0.03-0.5g
/cm^3. The air conditioning unit according to claim 1. (4) The air conditioning unit according to claim 1, wherein the upper end surface of the outer frame is provided with an engagement groove at its center, and the lower end of the outer wall is inserted and held in the engagement groove.