JPS595819B2 - Evaporator heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger used as an evaporator in a cooling device installed in, for example, a refrigerator, a low-temperature showcase, etc., and its purpose is to be extremely compact and yet It is an object of the present invention to provide a structure that is easy to manufacture, can reliably maintain the spacing between refrigerant conduit tubes, and can easily adjust the spacing.

This invention will be explained below based on embodiments shown in the drawings.

Note that in this specification, a row of tongue-like fins means a row of tongue-like fins arranged in the width direction of the refrigerant passage pipe.

In the drawing, 1 is an aluminum heat exchanger body,
This is formed by bending a refrigerant conduit 2 having a large number of rising tongue-like fins 3 on both upper and lower surfaces into a spiral shape having straight portions on the upper and lower sides.

The refrigerant passage pipe 2 has one refrigerant passage 4 therein, and both ends thereof are connected to communication pipes (not shown), respectively, and communicated with a compressor and a condenser.

Reference numeral 5 denotes a defrosting heating tube in which a heater wire is inserted into an aluminum outer tube, which is bent in a meandering manner, and its straight portion is connected to the horizontal rows of the many tongue-shaped fins 3 of the refrigerant conduction tube 2. They are disposed within the upper and lower outer fin portions of the heat exchanger main body 1 while being fitted into the gaps.

Reference numeral 6 denotes a large number of security plates provided on one side of the defrosting heating tube 5 at predetermined intervals in the tube axis direction.

These security plates 6 are fitted between the respective refrigerant passage pipes 2 of the heat exchanger main body 1.

In the heat exchanger configured in this way, the refrigerant conduction tubes 2 are sandwiched between the defrosting heating tubes 5 disposed above and below, so that they are firmly fixed, and the refrigerant conduction tubes 2 are secured to each other by a security plate. 6 at a predetermined interval.

Also, by changing the length of these security plates 6,
The interval between the refrigerant conduit tubes 20 can be easily adjusted.

That is, in general, in this type of heat exchanger, frost is likely to form on the refrigerant conduction tubes 2 and fins 3 on the air introduction side, so the intervals between the refrigerant conduction tubes 2 on the air introduction side are widened. The distance between the refrigerant conduction tubes 2 on the air discharge side is reduced.

Therefore, in such a case, the length of the security plate 6 on the air introduction side of the heat exchanger should be made thicker (and the length on the air outlet side should be made thicker) in accordance with the predetermined spacing between the refrigerant conduit pipes 2. By reducing the length of the security plate 6 and attaching the heating tube 5 to the heat exchanger main body 1, the refrigerant conduction tubes 2 can be reliably adjusted and set at predetermined intervals.

In order to provide the security plate 6 on the defrosting heating tube 5, for example, when the aluminum outer tube constituting the heating tube 5 is produced by extrusion molding, a convex strip for the security plate is integrally formed on one side of the aluminum outer tube. This is done by forming the protrusions in advance and then sequentially cutting off the protrusions in sections corresponding to the width of the refrigerant passage tube 20, leaving the necessary length of the security plate 60.

Note that the present invention is not only applicable to a spiral heat exchanger such as a top-packed heat exchanger, but also to a refrigerant conduit 2 having a large number of tongue-like fins 3 on at least one side and having one or more refrigerant passages 4. It is also applicable to all types of heat exchangers constructed by

As mentioned above, the evaporator heat exchanger according to the present invention includes:
A heat exchanger main body 1 is composed of a refrigerant conduit 2 in which a large number of tongue-shaped fins 3 are provided at a predetermined interval on at least one side, and a plurality of security plates 6 are provided on one side at a predetermined interval. The defrosting heating pipe 5 is provided with a defrosting heating pipe 5 provided in the axial direction, and the defrosting heating pipe 5 connects its security plate 6 to the heat exchanger main body 1.
It is arranged in the width direction of the refrigerant conduction pipes 2 by being fitted into the gaps between the horizontal rows of the above-mentioned large number of tongue-shaped fins 3, and is used for defrosting. Since the heating tubes 5 are arranged in rows of a large number of tongue-like fins 3, the heat exchanger is very compact.

Furthermore, since the defrosting heating tube 5 can be easily fitted between the rows of tongue-like fins 3, the heat exchanger can be manufactured very easily.

Further, the refrigerant conduction tubes 2 are reliably held at a predetermined distance from each other by the security plate 6, and by changing the length of the security plate 6, the distance between the refrigerant conduction tubes 2 can be easily adjusted. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the invention, and FIG. 2 is a perspective view showing an embodiment of the invention.
FIG. DESCRIPTION OF SYMBOLS 1...Heat exchanger main body, 2...Refrigerant conduction pipe, 3...Tongue fin, 4...Refrigerant passage, 5...・Heating tube for defrosting, 6...-Guarantee plate.

Claims (1)

[Claims] 1 A heat exchanger main body 1 consisting of a refrigerant conduit 2 having a large number of tongue-like fins 3 spaced apart from each other on one side, and a plurality of security plates 6 spaced apart from each other at a certain distance from each other on one side. The defrosting heating tube 5 is provided with an opening and provided in the tube axis direction, and the defrosting heating tube 5 fits its security plate 6 between each refrigerant conduction tube 2 of the heat exchanger body 1. The evaporator heat exchanger 6 is fitted into the gap between the horizontal rows of the plurality of tongue-like fins 3 and arranged in the width direction of the refrigerant passage pipe 2.