JPS6330077Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved structure of a heat exchange unit equipped with an air filter.

In general, in order to removably position and place an air filter on the air suction side of a heat exchange unit, the conventional structure has been to create a complicated shape in which the unit body is folded and folded back, or to prepare mounting parts separately and fix it to the unit body. Because it was in the form of
The drawbacks were that the processing was troublesome and the cost was high.

In view of these points, this proposal uses the combined part of the unit main body and the heat exchanger to position and mount the air filter, and the gap created in this combined part acts as a suction part for the lower frame of the air filter. The purpose of this invention is to provide a heat exchange unit that prevents air from leaking from the gap and between the bottom frame of the air filter and the air filter stopper piece of the heat exchanger, and to achieve this purpose, the present invention has been developed. The rising wall on one side of the bottom box is bent into an L-shape to form a mounting piece for the air filter, and the lower tube plate of the heat exchanger erected on the bottom box is provided with the above-mentioned mounting piece. An air filter stopper piece having a gap is provided, and this gap is closed by the lower frame of the air filter.

An embodiment of the present invention will be described below based on the drawings. FIG. 1 is an exploded perspective view of the main parts of the heat exchange unit;
FIG. 2 is a cross-sectional view of the main part in this assembled state.
2 is an underframe plate of the unit main body, 2, 2 is a pair of horizontal support frames fixed to the side plates 3 of the underframe plate, and 4 is a rectangle placed astride the support frame. 5 is a mounting piece for an air filter 7 formed by bending the rising wall 6a on one side of the bottom box inward into an L shape; 8 is a mounting piece for an air filter 7; This is a plate fin type heat exchanger including a tube plate 13 into which fins 10 are horizontally fitted and a tube plate 13 having a pair of mounting pieces 11, 11 and a stopper piece 12 on the left and right sides and on the front side at the lower edge.

This heat exchanger 8 is installed upright on the bottom box 4, and the mounting pieces 11, 11 are connected to the left and right rising walls 6b,
6c, the mounting pieces 11, 11 are set high so that the U-bend 14 of the heat exchange pipe 9 does not come into contact with the inner bottom wall 15 of the bottom box 4, and the height of the stopper piece 12 is set high. The dimensions are such that when heating and brazing the connecting part 16 of the U-bend 14 from the front and rear directions along the longitudinal direction of the heat exchanger 8, the height is equal to that of the connecting part 16 so that the heating flame reaches the connecting part 16. It's summery.

The air filter 7 has a general structure in which a filter element 18 is wound around a rectangular outer peripheral frame 17 formed of a metal rod.

Therefore, the air filter 7 is inserted across the side plate 3 into the mounting portion of the air filter 7, which is formed with a gap 19 by the mounting piece 5 of a part of the bottom box 4 and the stopper piece 12 of the tube plate 13. When the unit is placed and a blower (not shown) inside the unit is operated, the filter element 18 is attracted to the heat exchanger 8 side, and the lower frame 20 of the outer frame 17 positioned so as to close the gap 19 is moved. Due to the difference in positive and negative pressures, it is brought into close contact with the gap 19, and a part of the suction air can be prevented from leaking into the unit body through this gap.

As described above, in this case, an air filter mounting piece is provided in the bottom box of the unit body, and an air filter stopper piece is provided on the lower tube plate of the heat exchanger, which has a gap with the above-mentioned mounting piece. The filter mounting part can be easily formed by simply bending, and the gap between the air filter mounting piece and the air filter stopper piece acts as a suction part for the bottom frame of the air filter. It is possible to reliably prevent air from leaking between the air filter stopper piece and the space below the lower tube plate of the heat exchanger.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the main part of the heat exchange unit of the present invention, and FIG. 2 is a sectional view of the main part in the assembled state. 4...Bottom box, 5...Placement piece, 6a...One side rising wall, 7...Air filter, 8...Heat exchanger, 19...Gap, 20...Bottom frame.

Claims (1)

[Scope of utility model registration request] One side rising wall of the bottom box is bent into an L-shape to form an air filter mounting piece, and the lower tube plate of the heat exchanger erected on the bottom box is provided with the above-mentioned mounting piece. 1. A heat exchange unit characterized in that a stopper piece for an air filter is provided with a gap between the air filter and the air filter, and the gap is closed by a lower frame of the air filter.