JPH0422187Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a heat exchange unit suitable for outdoor units of separate air conditioners, condensing units of refrigerators, etc.

(b) Conventional technology Conventionally, the outdoor unit has been equipped with a temperature sensor that detects the outside temperature as a signal to start defrosting, and the condensing unit has a temperature sensor that detects the outside temperature as a signal to control the rotation speed of the condenser fan. . Currently, for this purpose, a synthetic resin holding piece that is inserted between the fins of a plate-fin type heat exchanger and a holding tube that is welded to the return bend of the heat exchange pipe are separately used as installation-specific parts. It was hot.

(c) Purpose of the invention This proposal does not use special parts to install the temperature sensor.
To provide a heat exchange unit in which a mounting cover for fixing plate fin type heat exchangers together and protecting the plate fins can be used for both purposes, thereby reducing the number of parts.

(d) Structure of the invention This invention is a heat exchange unit in which multiple rows of plate-fin type heat exchangers are arranged side by side on a bottom plate, and a mounting cover that is attached to the upper edge of the end face of the heat exchanger is installed in multiple ways. By comprising a covering part that straddles the plate fin type heat exchanger and simultaneously clamps the upper edge of the plate fin from above, and a mounting part for the temperature sensing element extending from this covering part, the covering part The temperature sensing element is attached using a mounting cover that secures the heat exchangers together and prevents the upper edges of the fins from being crushed.

(e) Embodiment An embodiment of the present invention will be explained based on the drawings. Fig. 1 is a perspective view of an outdoor heat exchange unit in a separate air conditioner, and this unit has a bottom plate 1, a top plate 2,
The exterior case 5 can be overturned from the front panel 3 and the side panels 4, and outdoor air can be taken in from the intake grills 8 on the side surfaces 6 and the back surface 7, and the auxiliary intake ports 9 on the side surfaces 6, and the exhaust grille 1 can be installed.
The structure is such that it is ejected from zero to the front.

Fig. 2 is a perspective view of the main parts of the heat exchange unit with the exterior case 5 removed, and Fig. 3 is an exploded perspective view of the heat exchange unit. Exchangers 11 and 12, support legs 15 of the drive motor 14 of the axial fan 13,
A compressor (not shown) is installed.

Therefore, plate fin type heat exchangers 11, 12
is the end face portion 16, 1 where the compressor and refrigerant pipe are connected.
7 are connected by a common tube plate 18, and the other end face portions 19 and 20 are connected to a plate fin 21.
A tube plateless type is used, which is formed by the heat exchangers 11 and 22a.For this reason, the upper edges of the central parts 23 and 24 of the plate fins 21 and 22 are Upper plate 2 of support leg 15
The upper edge portions of the end surfaces 19 and 20 are held between the covering portion 29 of the mounting cover 28 by the bent pieces 26 of No. 5 and the cut and raised pieces 27, 27, respectively.

This mounting cover 28 covers the inner and outer upper edges 3 of the plate fins 21a and 22a of the heat exchangers 11 and 12.
0 and 31 are held between the side pieces 32 and 32, and the mounting part 33 is bent downward and extended. The temperature sensing element 34 that detects the outside temperature is in band 3.
5 and is secured with 36 screws.

37 is a styrene foam shield fitted into the return bend portion 38 of the inner heat exchanger 11.

The structure is as described above, and the heat exchangers 11, 1
2 have the same length, when placed on the bottom plate 1, the end surfaces 19 and 20 shift to form a stepped portion 39, so that the return bend portion 40 of the outer heat exchanger 12 is accommodated within this stepped portion. become. Next, the temperature sensing element 34 is fixed to the mounting cover 28 with screws 36 in advance, and the mounting part 33 is attached to the end face part 19 of the inner heat exchanger 11.
The mounting part 33 is partially overlapped with the heat exchanger 11, 12 so that the mounting cover 28 can be covered from above, and the covering part 29 can simultaneously hold the inner and outer upper edges 30, 31 of the plate fins 21, 22. . Then, in the completed state of the heat exchange unit with the exterior case 5 assembled, the outer heat exchanger 12 is connected to the intake grille 8, and this return bend part 40 is connected to the auxiliary intake port 9, as shown in the cross-sectional view of the main part shown in FIG. and confront each other. Therefore,
Outdoor air sucked in from the intake grille 8 by the operation of the axial fan 13 passes through the outer heat exchanger 12 to the inner heat exchanger 11, and outdoor air sucked in from the auxiliary suction port 9 passes between the return bend portions 40. The heat exchangers 11 and 12 then flow into the inner heat exchanger 11 to exchange heat with the outdoor air, and a part of the outdoor air taken in from the auxiliary suction port 9 is shielded while coming into contact with the temperature sensing element 34. When the air is sucked into the axial flow fan 13 through the gap 41 above the tool 37, the temperature sensing element 34 detects the outside temperature.

Moreover, in this completed state, the plate fins 21 and 22 receive the load from above by the covering portion 29 of the mounting cover 28 and the upper plate 25 of the support leg 15, so that the plate fins 21 and 22 are not crushed. The upper end of the end face part 20 of the outer heat exchanger 12 is housed in the mounting cover 28, and a part of the upper end of the end face part 19 of the inner heat exchanger 11 is housed in the mounting part 33.
Since the plate fins 21a and 2 overlap,
Since the heat exchanger 2a does not have a tube plate, there is no possibility that the heat exchanger 2a will peel off and the heat exchange rate will be reduced, and that the temperature sensing element 34 will be covered with frost, which may cause residual frost especially during heating in winter.

(f) Effects of the invention The heat exchange unit of the present invention has a mounting part for the temperature sensing element on the mounting cover, which holds multiple rows of plate-fin type heat exchangers in the covering part and prevents the upper edges of the fins from being crushed. Therefore, unlike conventional heat exchange units, there is no need to separately prepare special parts for mounting the temperature sensitive body, and the number of parts can be reduced.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view of a heat exchange unit, Fig. 2 is a perspective view of main parts of the heat exchange unit, Fig. 3 is an exploded perspective view of Fig. 2, and Fig. 4 is an exploded perspective view of the heat exchange unit. FIG. 2 is a cross-sectional view of the main parts of the heat exchange unit. 1... Bottom plate, 11, 12... Plate fin type heat exchanger, 19, 20... End face portion, 21, 22...
...Plate fin, 28...Mounting cover, 29...
...Covering portion, 30, 31... Upper edge of plate fin, 33... Mounting portion, 34... Temperature sensing element.

Claims (1)

[Scope of utility model registration request] It is equipped with a plurality of rows of plate-fin type heat exchangers arranged side by side on the bottom plate, and a mounting cover attached to the upper edge of the end face of the heat exchanger. 1. A heat exchange unit comprising: a covering part that straddles the vessel and simultaneously clamps the upper edge of the plate fin from above; and a mounting part for a temperature sensing element extending from the covering part.