JPH06249543A - Evaporator - Google Patents

Abstract

PURPOSE:To provide an evaporator for use with freezing and air conditioning equipments, which is inexpensive and in which refrigerant sounds generated from an outlet of a capillary tube is easily suppressed by a simple part. CONSTITUTION:An evaporator comprises a group of heat transfer pipes 13, in which a refrigerant flows, a plurality of fins 14 provided with heat transfer pipe insertion holes which are conformed to an arrangement of the group of heat transfer pipes 13 and to which the group of heat transfer pipes 13 are joined, end plates 15 attached to both ends of the group of fins and provided with heat transfer pipe insertion holes which are conformed to an arrangement of the group of heat transfer pipes in a similar manner to the fins and to which the group of heat transfer pipes are joined, and a damping material 16 inserted into and mounted to those portions of the fins, to which the heat transfer pipes are joined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an evaporator for refrigerating and air conditioning equipment.

[0002]

2. Description of the Related Art In recent years, refrigeration and air-conditioning equipment has been undertaken to reduce noise from the viewpoint of improving comfort. Under such circumstances, at the same time as the development and improvement of the noise reduction of the blower and the compressor, the sound when the refrigerant flows (hereinafter, refrigerant sound) has been studied. The parts where the refrigerant noise is large are
There are many places where the flow of the refrigerant changes, and it is necessary to take measures against the noise of the refrigerant even in the portion that flows out from the capillary tube to the evaporator.

A conventional evaporator will be described below with reference to JP-A-4-80576.

FIG. 5 shows an evaporator and a capillary tube connected to a refrigerant inlet of the evaporator. In FIG. 5, 1 is an evaporator, 2 is a capillary tube, and the evaporator 1
In the drawing, 3 is a heat transfer tube, 4 is a fin in which the heat transfer tube 3 is joined to a heat transfer tube insertion hole (not shown) provided in accordance with the arrangement of the heat transfer tube group 3, and 5 is attached to both ends of the fin and the fin 4 Similarly, an end plate in which the heat transfer tubes are joined to the heat transfer tube insertion holes 9 provided in accordance with the arrangement of the heat transfer tube group 3 is shown. In Japanese Patent Laid-Open No. 4-80576, as shown in FIG. 6 showing a section A of FIG. 5, a connecting pipe 5 having a thick wall thickness between the evaporator 1 and the capillary tube 2 and a middle portion of the pipeline is gradually enlarged. Are connected.

The operation of the evaporator 1 having the above structure will be described below. First, the refrigerant flowing in the refrigeration system is supplied from the capillary tube 2 to the connection pipe 5
Flow into the evaporator. Originally, when the refrigerant flows from the capillary tube having a small tube inner diameter to the evaporator having a relatively large tube inner diameter, the pressure drop becomes sharp and abnormal noise (refrigerant noise) is generated from the refrigerant. However, in this conventional example, a sharp pressure drop of the refrigerant is alleviated by gradually expanding the flow path in the connection pipe 5, and the connection pipe 5 is thickened and made thicker so that vibration is prevented and abnormal noise of the refrigerant ( Refrigerant noise) is not generated.

[0006]

However, in the above-mentioned conventional structure, the connecting pipe 5 must be made of a thick material having a high material cost and a thick wall, and the man-hours for gently expanding the inner shape of the pipe. Therefore, there is a problem in that the cost of the evaporator 1 itself increases.

In order to solve the above-mentioned conventional problems, it is an object of the present invention to provide an evaporator which suppresses the generation of refrigerant noise and suppresses the increase in cost associated therewith.

[0008]

To achieve this object, the evaporator of the present invention transfers heat to a heat transfer tube group through which a refrigerant flows and a heat transfer tube insertion hole provided in accordance with the arrangement of the heat transfer tube group. Consisting of a plurality of fins joined to the heat tube group, and end plates joined to the heat transfer tube insertion holes provided at both ends of the plurality of fins and aligned with the arrangement of the heat transfer tube group like the fins, A damping material is attached to a portion where the heat transfer tube and the fin are joined.

Further, the evaporator of the present invention includes a heat transfer tube group in which a refrigerant flows, and a plurality of fins in which the heat transfer tube group is joined to the heat transfer tube insertion holes provided in accordance with the arrangement of the heat transfer tube group. End plates for heat transfer tubes, which are attached to both ends of a plurality of fins and which are joined to heat transfer tube insertion holes provided in accordance with the arrangement of heat transfer tube groups like fins, and which serve as a refrigerant inlet port. A burring portion is provided in the insertion hole, and the end of the capillary tube connected to the refrigerant inlet is located in the burring portion.

[0010]

With this configuration, the heat transfer tube at the outlet of the capillary tube where the pressure drop is large and the refrigerant noise is likely to occur
By attaching a damping material, it is possible to prevent vibration and suppress the generation of refrigerant noise.

Further, by fixing the heat transfer tube at the outlet of the capillary tube at the burring portion of the end plate, vibration is prevented and the generation of refrigerant noise can be suppressed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 11 is an evaporator, 12 is a capillary tube, 13 is a heat transfer tube, and 14 is a heat transfer tube insertion hole (not shown) provided according to the arrangement of the heat transfer tube group 13.
It is a plurality of fins in which the heat transfer tubes 13 are joined to each other. Reference numeral 15 is an end plate attached to both ends of the fin 14 and having heat transfer tubes joined to the heat transfer tube insertion holes 19 provided in accordance with the arrangement of the heat transfer tube group 13 like the fins 14. Reference numeral 16 denotes a damping material attached to the heat transfer tube connecting the capillary tube from the fin joint portion. The damping material 16 can be easily processed by integral molding and can be easily attached to the evaporator 11 by inserting it between the fins 14. Further, the end portion 17 of the capillary tube is connected to the heat transfer tube 13
The damping material 16 is located in the part where it is attached.

Regarding the evaporator configured as described above,
The operation will be described. The refrigerant flowing through the refrigeration system flows into the evaporator 11 from the capillary tube 12. When the refrigerant flows from the capillary tube 12 having a small tube inner diameter to the heat transfer tube 13 of the evaporator 11 having a relatively large tube inner diameter, the pressure drop becomes sharp and an abnormal noise (refrigerant sound) is generated from the refrigerant. Since the heat transfer tube 13 to which the damping material 16 is attached is isolated from vibrations, the generation of refrigerant noise is suppressed.

As described above, according to this embodiment, the fin 1
By inserting the damping material 15 from between 4 and fixing it to the heat transfer tube 13, it is possible to suppress the generation of the refrigerant noise by an inexpensive method without using an expensive component for suppressing the refrigerant noise.

Next, a second embodiment of the present invention will be described with reference to the drawings. In FIG. 3, 21 is an evaporator, 22 is a capillary tube, 23 is a heat transfer tube,
Reference numeral 24 is a fin in which the heat transfer tubes 23 are joined to heat transfer tube insertion holes (not shown) provided in accordance with the arrangement of the heat transfer tube group 23.
25 are attached to both ends of the fin 24 and the fin 24
Similarly, an end plate in which the heat transfer tubes are joined to the heat transfer tube insertion holes 29 provided in accordance with the arrangement of the heat transfer tube group 23 is shown. Of the heat transfer tube insertion holes 29 of the end plate 25, the burring portion 26 is provided in the end plate insertion hole of the heat transfer tube 23 that serves as the refrigerant inlet port, and FIG. 4 (FIG. 4 is a cross-sectional view showing details of the C portion of FIG. 3). ), The end portion 27 of the capillary tube 22 connected to the refrigerant inlet is located in the burring portion 26. Further, the heat transfer tube 23 and the fins 24 mechanically expand and join the heat transfer tube 23, but the burring portion 26 is also joined to the heat transfer tube 23 at the same time.

Regarding the evaporator configured as described above,
The operation will be described. The refrigerant flowing through the refrigeration system flows into the evaporator 21 from the capillary tube 22. When the refrigerant flows from the capillary tube 22 having a small tube inner diameter to the heat transfer tube 23 of the evaporator 21 having a relatively large tube inner diameter, the pressure drop becomes sharp and an abnormal noise (refrigerant sound) is generated from the refrigerant. Since the end portion 27 of the capillary tube 22 is located inside the burring portion 26 of the end plate 25, the heat transfer tube 23 is prevented from being vibrated by the burring portion 26 and the generation of refrigerant noise is suppressed.

As described above, according to this embodiment, the end plate 25
Of the heat transfer tube insertion hole 29 of the heat transfer tube 2 serving as a refrigerant inlet port
By providing the burring portion 26 in the end plate insertion hole of No. 3 and locating the capillary tube end portion 27 in the burring portion 26, the refrigerant noise can be produced by an inexpensive method without using an expensive component for suppressing the refrigerant noise. Occurrence can be suppressed.

[0019]

As described above, according to the present invention, the heat transfer tube group in which the refrigerant flows, and the plurality of fins in which the heat transfer tube group is joined to the heat transfer tube insertion hole provided in accordance with the arrangement of the heat transfer tube group are provided. And an end plate attached to both ends of the plurality of fins and joining the heat transfer tube group to a heat transfer tube insertion hole provided in accordance with the arrangement of the heat transfer tube group similarly to the fin, and the heat transfer tube and the fin are By attaching the damping material to the joined portion, it is possible to realize an excellent evaporator capable of suppressing the generation of the refrigerant noise by an inexpensive method without using an expensive component for suppressing the refrigerant noise.

Further, according to the present invention, a heat transfer tube group in which a refrigerant flows, a plurality of fins in which the heat transfer tube group is joined to heat transfer tube insertion holes provided in accordance with the arrangement of the heat transfer tube group, and the plurality of fins The heat transfer tube group is attached to both ends of a sheet of fins, and is composed of end plates in which the heat transfer tube groups are joined to the heat transfer tube group insertion holes provided in accordance with the arrangement of the heat transfer tube groups like the fins. A burring portion is provided in the insertion hole for the heat transfer tube that serves as the refrigerant inlet port, and the end portion of the capillary tube connected to the refrigerant inlet port is located in the burring portion, which is expensive for suppressing refrigerant noise. It is possible to realize an excellent evaporator capable of suppressing the generation of refrigerant noise by an inexpensive method without using any parts.

[Brief description of drawings]

FIG. 1 is a perspective view of an evaporator according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing details of part B in FIG.

FIG. 3 is a perspective view of an evaporator according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing details of a C portion of FIG.

FIG. 5 is a perspective view of a conventional evaporator.

FIG. 6 is a cross-sectional view showing details of part A of FIG.

[Simple explanation of symbols]

 11, 21 Evaporator 22 Capillary tube 13, 23 Heat transfer tube 14, 24 Fins 15, 25 End plate 16 Damping material 26 Burring part 19, 29 Heat transfer tube insertion hole (end plate)

Claims (2)

[Claims] 1. A heat transfer tube group in which a refrigerant flows, a plurality of fins in which the heat transfer tube group is joined to a heat transfer tube insertion hole provided in accordance with the arrangement of the heat transfer tube group, and a plurality of fins of the plurality of fins. The heat transfer tube insertion holes provided at both ends and arranged in accordance with the arrangement of the heat transfer tube groups, which are provided in accordance with the arrangement of the heat transfer tube groups, are composed of end plates, and a damping material is provided at a portion where the heat transfer tubes and the fins are joined. Evaporator attached. 2. A heat transfer tube group in which a refrigerant flows, a plurality of fins in which the heat transfer tube group is joined to a heat transfer tube insertion hole provided in accordance with the arrangement of the heat transfer tube group, and a plurality of the fins. A heat transfer tube insertion hole provided at both ends and provided in accordance with the arrangement of the heat transfer tube group, as in the case of the fins, and an end plate joined to the heat transfer tube group.The heat transfer tube insertion hole of the end plate serves as a refrigerant inlet. An evaporator in which a burring portion is provided in the insertion hole of the heat pipe, and the end of the capillary tube connected to the refrigerant inlet is located inside the burring portion.