JPH06159956A - Ceiling-recessed heat exchanger - Google Patents

Abstract

PURPOSE:To certainly prevent a heat exchange element from falling down when the heat exchange element is mounted, by providing an extension part on a fixing bracket to allow the closing motion of an element cover only when the fixing bracket is in fixing posture. CONSTITUTION:When a worker tries to shut an element cover 30 with a fixing bracket M1 in the releasing posture during setting work of a heat exchange element 20, an extension part 1c of the fixing bracket M1 is kept from passing through a relief of the element cover 30. As a result, the extension part 1c hinders the closing motion of the element cover 30, and the worker can not finish the setting work of the heat exchange element 20. In other words, the worker has to surely shift the fixing bracket M1 to the fixing posture prior to the closing action of the element cover 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted heat exchanger, and more particularly to a ceiling-mounted heat exchanger of a type having a heat exchange element detachably attached.

[0002]

2. Description of the Related Art Referring to FIG. 5, which is a cross-sectional view of a conventional ceiling-embedded heat exchanger, a ceiling-embedded heat exchanger 100 of this type generally supplies two types of air to be heat-exchanged. It is provided with a heat exchange element 101 that performs heat exchange by connecting to different flow paths, and a box-shaped housing 102 that accommodates the heat exchange element 101 (for example, Japanese Utility Model Laid-Open No. 1-60142, Japanese Utility Model Publication 3-). 54345).

The heat exchange element 101 has a rectangular end surface and is accommodated in the housing 102 in a state where its longitudinal direction extends substantially horizontally. On the other hand, the housing 102 is a box body arranged in the ceiling, and has a lower portion with an insertion / extraction opening 102a for communicating with the room from the ceiling and inserting / extracting functional components therein. The heat exchange element 101 is vertically inserted and removed through the insertion / extraction opening 102a in a state where the longitudinal direction extends substantially horizontally. The insertion / removal opening 102a is normally closed by an element lid 102b so that it can be opened and closed.

Here, in the conventional heat exchanger 100, the heat exchange element 10 is provided on the inner surface of the housing 102.
A pair of mounting plates 104, 105 facing both end surfaces of
And the dimension L1 between both mounting plates 104 and 105 is set to be equal to or less than the dimension L2 in the longitudinal direction of the heat exchange element 101, whereby the heat exchange element 101 is pinched in the longitudinal direction.

Particularly, in the structure disclosed in Japanese Utility Model Publication No. 59-2413, the mounting plates 104 and 105 are formed of an elastic body to prevent a gap.

[0006]

As described above, in the conventional heat exchanger 100, since the heat exchange element 101 is simply held by the elastic force of the mounting plates 104 and 105, the heat exchanger 100 is used for a long period of time. Each mounting plate 10
When the elastic force of 4, 105 decreases, each mounting plate 104,
The holding force of 105 also deteriorates, and there is a problem that the heat exchange element 101 drops downward when the element lid 102b is opened. In particular, the ceiling-embedded heat exchanger 10 having the above configuration
At 0, the heat exchange element 101 is constantly subjected to the action of gravity, and therefore prevention of falling is an important problem to be solved.

In order to prevent such a problem, it is conceivable to provide a fixing metal fitting to the housing 102. However, if the fixing metal fitting is simply provided, it may cause a human factor, that is, a cause such as forgetting to tighten. However, there is still a problem that the above problems cannot be solved. The present invention has been made in view of the above problems, and an object of the present invention is to provide a ceiling-embedded heat exchanger that can surely prevent falling when the heat exchange element is mounted.

[0008]

In order to solve the above-mentioned problems, the ceiling-embedded heat exchanger of the present invention is disposed in the ceiling, and communicates with the room from the ceiling to provide a functional component therein. A housing having an insertion / removal opening for insertion / removal at the bottom, a heat exchange element formed in a substantially polygonal columnar shape and inserted / extracted into / out of the housing from the insertion / extraction opening of the housing, and attached to the housing to open / close the insertion / extraction opening And an element fixing means arranged between the element lid and the heat exchange element, wherein the element fixing means fixes the heat exchange element housed in the housing to the housing side, and The fixing metal fitting that is displaceable from the fixed posture to the releasing posture that releases the fixed state, and the fixing metal fitting that is extended to the fixing metal fitting and that is in the fixed posture. It is characterized by and a extended portion to allow the closing operation of cement lid.

[0009]

According to the above construction, the heat exchange element is inserted into the housing through the insertion / removal opening, the fixing metal fitting of the element fixing means is displaced from the releasing posture to the fixing posture, and then the element lid is closed to heat exchange. The element insertion work can be completed. If the element lid is closed while the fixing metal fitting is in the releasing posture during the above-mentioned work, the extension portion of the fixing metal fitting impedes the closing operation of the element lid, so that the operator should finish the insertion work of the heat exchange element. I can't. Therefore, the operator must always displace the fixing member to the fixed posture prior to the closing operation of the element lid.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. First, referring to FIGS. 2 and 3 which are bottom views of the ceiling-embedded heat exchanger according to the embodiment of the present invention, the ceiling-embedded heat exchanger according to the embodiment is formed in a box shape. A housing 10 is provided.

The housing 10 is arranged in a ceiling space which is separated from the indoor space by a ceiling plate (not shown), and has an insertion / extraction opening for inserting / extracting functional components such as a heat exchange element 20 which will be described later. It has 10a at the bottom. The heat exchange element 20 is held by an element case (not shown), and is arranged in the housing 10 in a posture that extends substantially horizontally.

The heat exchange element 20 is formed by forming a sheet-shaped material having a good thermal conductivity such as Japanese paper in a predetermined shape and further stacking the material so that the air introduced into the indoor space can flow through the flow path and the outside. It is formed in a polygonal prism shape having a flow path for allowing the discharged air to flow therethrough. Then, on the side surface of the heat exchange element 20, a first circulation port 21 for circulating one of the air to be heat-exchanged and a second circulation port 22 for circulating the other air are formed. At the time of disposing the heat exchange element 20, the respective flow ports 21, 22
Are lined up and down. Although not specifically shown, a dust removal filter is detachably fixed to the flow passage on the upstream side of each flow path.

In order to dispose the heat exchange element 20 horizontally, a pair of mounting members 11 and 12 abutting against both end surfaces of the heat exchange element 20 are mounted in the housing 10. Each of the mounting members 11 and 12 is formed by bending a sheet metal member into a thin-walled box shape, and is fixed to the corresponding inner wall of the housing 10 while facing each other in one direction inside the housing 10. By setting the dimension L1 between the mounting members 11 and 12 (only FIG. 2 is shown) to be equal to or less than the length in the longitudinal direction of the heat exchange element 20, the heat exchange element 20 is sandwiched and held between them. It is for doing. The mounting member 11,
A screw hole 12a into which a fixing screw B of an element lid 30 described later is screwed is screwed into one of the 12 (the mounting member 12 in this embodiment).

As shown in FIG. 3, the heat exchange element 20.
An element lid 30 is disposed below the element. The element lid 30 is for closing the insertion / removal opening 10a of the housing 10 so as to be openable and closable.
And a lid portion 32 pivotally supported by a hinge H with respect to the fixed portion 31.

Although not specifically shown, a panel facing the indoor space is provided below the element lid 30, and the panel allows the outer peripheral portion of the opening of the housing 10 to be connected to the intake port and the exhaust port. The mouth is divided. Here, in this embodiment, the element fixing means M is provided between the element lid 30 and the heat exchange element 20. The element fixing means M firstly includes a fixing metal fitting M1 provided on the one mounting member 11.

As shown in FIG. 4, the fixing metal fitting M1 is
The main body 1a is formed in a substantially rectangular shape. An insertion hole 1b is formed at a predetermined position of the main body 1a, and a bolt M2 penetrates the insertion hole 1b. By screwing the bolt M2 onto the lower surface of the mounting member 11, The fixing bracket M1 is pivotally supported on the housing 10 side. Then, in this shaft support state, the fixing metal fitting M1
With the longitudinal direction of the main body portion 1a extending substantially parallel to the longitudinal direction of the heat exchange element 20, one end portion in the longitudinal direction projects from the mounting member 11 to the heat exchange element 20 side, and the heat contained in the housing 10 is accommodated. Exchange element 2
0 to the housing 10 side (Fig. 1
(A), FIG. 2 (A), and FIG. 3 (A)), and the body portion 1a rotates clockwise around the bolt M2 in the figure, and the heat exchange element 20 is rotated. The one end in the longitudinal direction moves from the side of the heat exchange element 20 to the side of the mounting member 11 by running along the direction orthogonal to the longitudinal direction of, and is released from the fixed posture to release the fixed state (FIG. 1 ( B), the position shown in FIG. 2B, and the position shown in FIG. 3B).

Next, at the other longitudinal end of the main body 1a,
An extending portion 1c extending downward in the axially supported state of the fixing fitting M1 is integrally formed. The extended portion 1c is formed in a rectangular plate shape, and has a length capable of preventing the closing operation of the element lid 30 by contacting the upper surface of the element lid 30 in the axially supported state of the fixing fitting M1. ing.

On the other hand, the element lid 30 is formed with a relief portion M3 for inserting the extended portion 1c. In the present embodiment, the relief portion M3 is the extension portion 1c.
And a hole facing the head of the bolt M2. Here, as shown in FIG. 3A, the escape portion M3 in the present embodiment is formed in a shape that allows the extension portion 1c to be inserted only when the fixing fitting M1 is displaced to the fixed posture. Has been done.

Next, the operation of this embodiment will be described with reference to FIG. According to the above configuration, by inserting the heat exchange element 20 into the housing 10 through the insertion / removal opening 10a, then displacing the fixing metal fitting M1 of the element fixing means M from the releasing posture to the fixing posture, and then closing the element lid 30. , As shown in FIG. 1 (A), the fixing bracket M
As a result of the extension portion 1c of No. 1 being inserted into the escape portion M3 of the element lid 30, the element lid 30 can end the closing operation without any hindrance. Therefore, in the above case, as shown in FIG.
The insertion work of the heat exchange element 20 can be completed by screwing the fixing screw B of the above into the screw hole 12a of the attachment member 12 from the lower surface side of the element lid 30.

On the other hand, during the above work, the fixing metal fitting M1
When the element lid 30 is to be closed in the releasing posture, the extending portion 1c of the fixing metal fitting M1 will be the escape portion M3 of the element lid 30 as shown in FIGS. 1 (B) and 3 (B).
It becomes impossible to insert the inside. As a result, the extension portion 1
The c hinders the closing operation of the element lid 30, and the operator cannot finish the insertion work of the heat exchange element 20. In other words, the operator always displaces the fixing metal fitting M1 to the fixed posture prior to the closing operation of the element lid 30. Therefore, according to the present embodiment, there is a remarkable effect that the fall prevention can be surely taken when the heat exchange element 20 is mounted.

The above-described embodiment is only a preferred example of the present invention, and various modifications are possible within the scope not changing the gist of the present invention, for example, the relief portion M3 is formed by a notch or a depression. It goes without saying that the design can be changed.

[0022]

As described above, according to the ceiling-embedded heat exchanger of the present invention, in the insertion work of the heat exchange element, the worker always holds the fixing metal fitting in a fixed posture before closing the element lid. As a result of displacing the heat exchange element, it is possible to reliably prevent the drop when the heat exchange element is mounted.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a ceiling-embedded heat exchanger according to an embodiment of the present invention, where (A) shows a case where a fixing metal piece is displaced to a fixed posture, and (B) shows a fixed state. The case where the metal fitting is displaced to the release position is shown.

FIG. 2 is a bottom view of the ceiling-embedded heat exchanger in the above-described embodiment, where (A) shows that the fixing fitting is displaced in the fixed posture, and (B) shows that the fixing fitting is displaced in the releasing posture. The case is shown.

FIG. 3 is a bottom view of the ceiling-embedded heat exchanger in the above-described embodiment, where (A) shows that the fixing metal piece is displaced to the fixed posture, and (B) shows that the fixing metal piece is displaced to the releasing posture. The case is shown.

FIG. 4 is an exploded perspective view of the fixing bracket and the bolt.

FIG. 5 is a cross-sectional view of a conventional ceiling-embedded heat exchanger,
(A) is a front sectional view and (B) is a side sectional view.

[Explanation of symbols]

 10 Housing 10a Insertion / Extraction Port 20 Heat Exchange Element 30 Element Lid M Element Fixing Means M1 Fixing Metal 1c Extension

Claims (1)

[Claims] 1. An insertion / removal opening (10a) which is disposed in a ceiling and which communicates with the room from the ceiling to insert / extract functional parts into / from the interior.
(10) having a lower part and a substantially polygonal columnar body, and an insertion / removal opening of the housing (10)
The heat exchange element (20) that is inserted into and removed from the housing (10) through the (10a), the element lid (30) that is attached to the housing (10) and opens and closes the insertion / extraction opening (10a), and the element lid (30 ) And the heat exchange element (20), the element fixing means (M) is provided between the heat exchange element (20) and the heat exchange element (20). A fixed metal fitting (M1) that is displaceable in a fixed posture for fixing to the housing (10) side, and a releasing posture that retracts from the fixed posture and releases the above-mentioned fixed state, and extends to the fixing metal fixture (M1). A ceiling-embedded heat exchanger, comprising: an extension portion (1c) that allows the closing operation of the element lid (30) only when (M1) is in a fixed posture.