JP2865351B2 - Ceiling-type cooling device - Google Patents

Description

The present invention relates to a ceiling-mounted cooling device, and more particularly to a ceiling-mounted cooling device provided with a defrost heater.

(B) Conventional technology As a conventional technology, for example, JP-A-53-80042 discloses a structure of an evaporator for a refrigerator with frost formation. In this evaporator, a hairpin-shaped refrigerant tube is inserted into the fin group, and a heater tube having a flexible heater provided therein is inserted in the center thereof, and the refrigerant tube and the heater tube between the fin groups are bent.
It is a meandering configuration.

(C) Problems to be Solved by the Invention In such a conventional technique, the evaporator section and the heater tube cannot be separated. For this reason, even when one of the evaporator and the defrost heater, which originally have different functions, breaks down, it is necessary to replace the normal one together with the normal one.

The present invention solves the problems of the prior art without impairing the mounting strength of the evaporator and the defrost heater, and is configured so that individual exchanges can be performed. In addition, heat exchange between the heat exchange tube of the evaporator and the defrost heater is performed. An object of the present invention is to provide a ceiling-mounted cooling device in consideration of performance.

(D) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a plurality of heat exchange tubes and a plurality of flat fins inserted into the heat exchange tubes at intervals. A plurality of the heat exchange tubes are provided in a long side direction of the fins, and an independent fin-type evaporator configured by bending the heat exchange tubes a plurality of times, and a meandering defrost heater are provided. In the cooling device, a pair of heater mounting plates provided with the meandering defrost heater and formed with a plurality of fitting grooves to be fitted to the lowermost heat exchange tubes, and both end portions of each of the heater mounting plates The mounting surface formed on the ceiling has a mounting surface to be detachably attached, and a receiving portion for supporting a heat exchange tube positioned higher than the lowermost heat exchange tube is formed, and the mounting portion is detachably attached to the ceiling wall. Providing the only fitting a ceiling suspension type cooling device according to claim.

(E) Function In the present invention, since the mounting plate for the defrost heater is mounted on the mounting bracket for receiving the evaporator, by removing the heater mounting plate from the mounting bracket, the defrost heater can be easily removed alone. The fitting groove formed in the heater mounting plate can prevent the evaporator from bending. Furthermore, the heat exchange performance between the heater and the heat exchange tube can be improved by fitting the heater attachment plate and the heat exchange tube and supporting the heat exchange tube with the fitting.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a longitudinal sectional side view of a cooling storage provided with the ceiling-mounted cooling device of the present invention.
A storage main body having a heat insulating structure comprising:
Has a removable refrigeration unit mounting base 3 which closes an opening formed in the top wall and forms a part of the top wall. An electric compressor 4, a condenser 5, and a condenser air-cooling blower 6 constituting a refrigerating device are mounted on the upper surface of the gantry 3, and the electric compressor 4, the condenser 5
A ceiling-mounted cooling device 7 of the present invention, which constitutes the refrigerating device together with the condenser air-cooling blower 6, is detachably mounted. Although not shown in detail, a unit cover 8 is provided below the cooling device 7, the front end of which is detachably attached to the inner surface of the top wall and the rear end of which is detachably attached to the inner surface of the rear wall. A cool air circulation fan 9 is attached to the cover 8 in front of the cooling device 7. Furthermore,
A suction port 10 is formed at the front of the unit cover 8 facing the cooling circulation fan 9, and a blow port is formed at the rear.
11 are formed.

The ceiling-mounted cooling device 7 is an exploded perspective view of FIG. 1, a plan view of the evaporator of FIG. 3 in the middle of assembling, and a front view showing an attached state of the cooling device of FIGS. As shown in detail in the drawing and the vertical side view, the evaporator 12 is constituted by an evaporator 12, a defrost heater 13, and some attachment members.

Among them, the evaporator 7 is a so-called well-known independent fin evaporator, and in the embodiment shown in FIG.
5, 16 and a plurality of flat rectangular fins, leaving a plurality of intervals for the meandering bending of the heat exchange tubes 14, 15, 16
17 are inserted at intervals. In this case, the heat exchange tube 14,
A plurality of 15 and 16 are provided in the long side direction of the rectangular fin 17. One end of the heat exchange tube 14 is used as a refrigerant inlet, the other end of the heat exchange tube 16 is used as a refrigerant outlet, and the header 18 is connected to the outlet side. Further, one ends of the heat exchange tubes 15 and 16 are connected by a U-shaped heat exchange tube 19, and the other ends of the heat exchange tubes 14 and 15 are connected by a U-shaped heat exchange tube 20. As a result, the heat exchange tubes 14, 15, 16 are continuous from the inlet to the outlet. Then, heat exchange tube 1
The bent portions 14A, 15A, 16A of 4, 15, 16 are bent in an arc shape to form the heat exchange tubes 14, 15, 16 in a meandering shape, thereby completing the assembly of the independent fin type evaporator 7. Note that the rectangular fin 17 has a notch 17A formed by diagonally notching each corner.

Next, the defrost heater 13 is formed in a meandering shape, and is attached to a pair of heater attachment plates 21. Specifically, a straight portion near the bent portion 21B of the heater 13 is swaged and coupled below the heater mounting plate 21. Thus, the defrost heater 13 is firmly fixed to the heater mounting plate 21. On the upper side of both heater mounting plates 21, a plurality of fitting grooves 22 are formed to be fitted to the base of the bent portion 16A of the lowest heat exchange tube 16, and this fitting groove 22 is provided with a defrost heater.
It is formed between the 13 straight portions. Furthermore,
At both ends of both heater mounting plates 21, mounting surfaces 21A facing outward are formed.

Next, members for attaching the evaporator 12 and the defrost heater 13 to the lower surface of the gantry 3 will be described. In the embodiment, the mounting member is constituted by a total of four mounting brackets 23, 23, 24, 24 each having the same shape. As shown in FIG. 1, the mounting bracket 23 and the mounting bracket 24 are different from each other only in the width L and the length of M, and have a relationship of L> M. On both sides of the lower ends of these mounting brackets 23 and 24, mounting surfaces 21 of the heater mounting plate 21 are provided.
Forming horizontal mounting surfaces 23A and 24A on which A is mounted, and bending the mounting surfaces 23A and 24A in the opposite direction to the mounting surfaces 23A and 24A at the upper ends of the mounting brackets 23 and 24, and mounting surfaces on the lower surface of the gantry 3. 23B, 24B are formed, and further, a side plate is protrudingly provided on both upper sides of the mounting bracket 23 and the mounting bracket 24, and the uppermost heat exchange tubes 14 located in the front row and the last row are arranged outside the rectangular fins 17. The upper receiving portions 23C, 24C and the lowermost receiving portions 23D, 24D that support the middle heat exchange tubes 15 located in the first and last rows and the middle heat exchange tubes 15 outside the rectangular fins 17 are formed, and the front and last rows are formed. Top heat exchange tube located in
Clamping portions 23E and 24E for clamping 14 outside the rectangular fin 17
Is formed.

In the above configuration, the assembly and mounting structure of the ceiling-mounted cooling device 7 will be described below. The assembling and mounting method generally adopted in a factory is such that the lower surface of the gantry 3 faces upward, and one mounting bracket 23
The mounting surface 23B of the mounting bracket 24 and the mounting surface 24B of the mounting bracket 24 are fixed with screws 25. Next, after the evaporator 12 is supported by the mounting hardware 23, 24, the mounting surface 23B of the other mounting hardware 23 and the mounting surface 24B of the mounting hardware 24 are fixed to the lower surface of the gantry 3 by screws 25. Thus, the middle heat exchange tubes 15 located in the front row and the rear row are supported by the lower receiving portions 23D and 24D of the mounting brackets 23 and 24.
Thereafter, the mounting surface 21A of the heater mounting plate 21 is fixed to the mounting surface 23A of the mounting bracket 23 and the mounting surface 24A of the mounting bracket 24 by screws 26. As a result, the fitting groove 22 formed on the upper portion of the heater mounting plate 21 is fitted to the base of the bent portion 16A of the lowermost heat exchange tube 16. At the same time, the defrost heater 13 is positioned in a space formed between the notches 17A of the adjacent rectangular fins 17, and is placed in contact with or in proximity to the rectangular fins 17. by this,
Defrosting of the evaporator 12 can be performed efficiently.

The two mounting brackets 23 and the two mounting brackets 24
Can be used before and after. This is because the mounting bracket 23 has two mounting surfaces 23A, and the mounting bracket 24 has two mounting surfaces 23A.
This is because there is one mounting surface 24A.

As described above, the assembly and installation of the ceiling-mounted cooling device 7 are completed. After that, the gantry 3 to which the ceiling suspension type cooling device 7 is attached is brought into a normal state, and then the electric compressor 4, the condenser 5 and the condenser air cooling blower 6 are attached to the upper surface of the gantry 3. The load during this time is received by the four mounting members 23 and 24.

After the installation of the refrigerating device on the upper surface and the lower surface of the gantry 3 is completed in this way, the gantry 3 is attached to the opening formed in the top wall of the storage main body 1, and the refrigeration unit 7 is inserted into the refrigerator. Complete assembly and installation. As a result, the uppermost heat exchange tubes 14 located in the front row and the last row are supported by the upper receiving portions 23C and 24C of the mounting brackets 23 and 24, and the total load of the evaporator 12 is reduced to four sheets. It is supported by the mounting brackets 23 and 24. With this alone, the front, rear, left and right positions of the evaporator 12 are substantially determined. However, the bending of the center portion of the evaporator 12 and the expansion and contraction in the front and rear direction are caused by the fitting grooves 22 formed in the upper portion of the heater mounting plate 21.
Is reliably prevented by fitting to the base of the bent portion 16A of the lowest heat exchange tube 16.

By the way, when the evaporator 12 and the defrost heater 13 are out of order, the defrost heater 13 can be easily removed and replaced alone by removing the heater mounting plate 21 from the mounting brackets 23 and 24. If it is, the defrost heater 13 can be replaced alone without replacing it together.

FIG. 7 shows another embodiment of the present invention, and the description of the same components as the embodiment is omitted. Further, the same names as those of the embodiment are assigned the same numbers as those of the embodiment. In another embodiment, the mounting surface 21A of the heater mounting plate 21 is mounted on the mounting surfaces 23A and 24A of the mounting brackets 23 and 24, and is fixed with screws 25. In the case of other embodiments, the evaporator 12 and the defrost heater 13 can be easily replaced independently.

(G) Effect of the Invention As described above, when the ceiling-mounted cooling device is configured by using the independent fin-type evaporator, the present invention relates to the fitting groove formed on the mounting plate of the defrost heater. By the action, it can be mounted very strongly.

In addition, when one of the evaporator and the defrost heater breaks down, it is not necessary to replace the heater with a normal one, the replacement can be easily performed independently, and the economic effect is extremely large.

Further, the heat exchange performance between the heater and the heat exchange tube can be improved by fitting the heater attachment plate and the heat exchange tube and supporting the heat exchange with the fitting.

[Brief description of the drawings]

1 to 7 relate to the ceiling-mounted cooling device of the present invention, FIG. 1 is an exploded perspective view of the ceiling-mounted cooling device, and FIG. 2 is a longitudinal section of a cooling storage provided with the ceiling-mounted cooling device. FIG. 3 is a side view, FIG. 3 is a plan view in the middle of assembling the evaporator, FIG. 4 is a front view showing an attached state of the cooling device, and FIG. 5 is AA in FIG.
FIG. 6 is a cross-sectional view, FIG. 6 is a vertical sectional side view showing a mounted state of a cooling device, and FIG. 7 is a view showing another embodiment of the present invention corresponding to FIG. 3 ... stand, 7 ... ceiling-mounted cooling device, 12 ... evaporator, 13
... defrost heater, 14 ... top heat exchange tube, 16 ... bottom heat exchange tube, 17 ... fin, 21 ... heater mounting plate, 21A ... mounting surface, 22 ... fitting groove, 23, 24… Mounting bracket, 23A, 23A… Mounting surface, 23C, 24C… Receiving part.

Claims (1)

(57) [Claims] 1. A heat exchanger comprising a plurality of heat exchange tubes and a plurality of flat fins inserted into the heat exchange tubes at intervals.
A plurality of the heat exchange tubes are provided in a long side direction of the fins, and an independent fin evaporator configured by the heat exchange tubes meandering a plurality of times, and a ceiling suspension including a meandering defrost heater In the mold cooling device, a pair of heater mounting plates provided with the meandering defrost heater and formed with a plurality of fitting grooves to be fitted in the lowermost heat exchange tubes, and both ends of each of the heater mounting plates The mounting surface formed on the portion has a mounting surface to which it can be detachably attached, and a receiving portion for supporting a heat exchange tube positioned higher than the lowest heat exchange tube is formed, and the mounting surface is detachably attached to the ceiling wall. A ceiling-mounted cooling device comprising metal fittings.