JPH0216155Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a stacked evaporator, and particularly to a reinforcing structure for an end plate attached to the outermost end of the stacked evaporator.

(Prior art and its problems) Since a stacked evaporator is composed of tube elements consisting of a pair of thin plate-like molded plates and corrugated fins, which are stacked alternately, the strength in the stacking direction is low, especially when the tube elements of the outermost end plate are stacked. Because internal pressure is concentrated and strongly applied to the part of the end plate that corresponds to the communication hole formed in the tank part of the element, conventionally an oval-shaped plate was brazed from the outside to the part of the end plate that corresponds to the tank part of the tube element to reinforce it. was. However, in such conventional examples, when the solder for brazing the plate does not flow over the entire surface and a pinhole is formed, that is, when the solder breaks, moisture such as condensed water intrudes into the broken part. However, due to the freezing and expansion of this moisture, the plate is pushed outward, so that a gap is created between the plate and the end plate, and a communication hole is formed from this gap to the tank part of the tube element. The refrigerant gas in the evaporator tends to leak outward through the holes, and the machining and brazing of the plates is troublesome.

(Purpose of the invention) The present invention was made in view of the above circumstances, and it increases the reinforcement strength of the end plate without using a reinforcing plate, eliminates the risk of refrigerant gas leakage, and makes assembly easier. The present invention provides a multilayer evaporator.

(Means for solving the problem) In order to achieve the above purpose, in this invention,
A laminated structure consisting of a tube element having a tank section at both ends and a passage section communicating between the tank sections, and corrugated fins stacked in multiple stages alternately, with an end plate arranged on the outside of the outermost tube element. In the mold evaporator, a portion of the end plate corresponding to the communication hole formed in the tank portion of the tube element is bent inward so that a protruding protrusion is fitted into the communication hole of the tube element adjacent to the end plate. By doing so, the end plate is reinforced.

(Embodiment of the invention) An embodiment of the invention will be described below based on the attached drawings.

First, to explain the configuration, the stacked evaporator 1
consists of a tube element A, a bellows-shaped corrugated fin 2, and end plates 3 and 4. As shown in Fig. 1, the tube element A is made up of a pair of dish-shaped molded plates 5, 5 joined together facing each other, and there are tank parts 6, 7 above and below between the opposing surfaces, and spaces between these tank parts 6, 7. It has a passage section 8 that communicates these. The tube elements A and the corrugated fins 2 are alternately stacked in multiple stages, and the end plates 3 and 4 are attached to the outermost tube element A via the corrugated fins 2, and the upper and lower tank parts 6 and 7
through the communication hole groups 9, 10 bored at predetermined locations of the molded plates 5, 5 of the adjacent tube element A.
By connecting the inflow pipe 12 to the lower tank part 7 of the tube element A located at one end and connecting the outflow pipe 11 to the upper tank part 6 of the tube element A located at the other end. The entire evaporator 1 is configured. The refrigerant is introduced into the lower tank part 7 from the inflow pipe 12, and vaporizes while passing through the passage part 8. The heat of vaporization generated at this time exchanges heat with a fluid such as air passing through the corrugated fin chamber 13, and the fluid is After being cooled, it is discharged from an outflow pipe 11 via an upper tank section 6.

The molded plate 5 constituting the tube element A has a substantially elongated rectangular shape as shown in FIG. 2, and is brazed with continuous annular surfaces of the peripheral edges 5a abutting against each other. For example, three communicating holes 9 are provided at the upper and lower ends of the molding plate 5 at predetermined locations.
a, 9b, 9c and 10a, 10b, 10c are drilled in parallel to form the aforementioned communicating hole groups 9, 10, respectively, and these communicating holes 9a-9c, 10a-10
Adjacent tank portions 6 and 7 are connected to each other via c, so that refrigerant gas can freely circulate.

As shown in FIGS. 3 and 4, the end plates 3 and 4 have approximately the same external shape as the molded plate 5, but the above-mentioned communication hole groups 9 and 10 are not bored, and one end plate 3 An inflow pipe 12 and an outflow pipe 11 are protruded from approximately the center of the lower end portion of the other end plate 4, respectively. Communication holes 9a, 9b, 9c at the upper part of the molded plate 5 of the tube element A adjacent to the end plate 3 of one end plate 3 and communication holes 10 at both ends of the lower part.
As shown in FIG. 5, protrusions 3a protruding toward the tube element A side are bent and protruded from portions corresponding to a total of five communication holes a and 10c, and these protrusions 3a communication holes 9a
9c, 10a, and 10c, respectively, to close these communication holes from the outside to prevent the refrigerant gas in the upper and lower tank portions 6, 7 from flowing outward. By providing the protrusion 3a in this way, the section modulus of the protrusion 3a portion of the end plate 3 increases and becomes strong against internal pressure. It is possible to resist the pressure exerted outwardly, that is, on the end plate 3 side. In addition, the communication hole 10 in the lower part of the molded plate 5 of the tube element A adjacent to the other end plate 4
a, 10b, 10c and communication holes 9a at both ends of the upper part,
A projection 4a protruding toward the tube element A side is provided at a portion corresponding to a total of five communication holes 9c.
are bent and protruded in the same manner as the protrusion 3a of the one end plate 3 described above, and the five communicating holes 10a,
10c, 9a, and 9c, respectively, to close these communication holes from the outside, so that the refrigerant gas in the upper and lower tank portions 6, 7 does not leak outward. Similar to the case of the one end plate 3, the other end plate 4
By providing the protrusion 4a in the upper and lower tank parts 6 and 7, the section modulus of the protrusion 4a becomes large.
It is possible to resist the pressure exerted outward, that is, on the end plate 4 side, by the refrigerant gas that fills the area.

(Function) Next, the function of the evaporator having the above structure will be briefly explained.

The refrigerant introduced into the lower tank part 7 by a compressor (not shown) from the inflow pipe 12 inserted and connected to the refrigerant circuit of the refrigerant cycle flows into the passage part 8,
While passing through (rising) inside the passage section 8, heat is exchanged with a fluid such as air passing through the corrugated fin chamber 13 in a direction perpendicular to the corrugated fin chamber 13 while colliding with the corrugated fin 2, and the upper tank section 6 After reaching , it returns to the compressor through the outlet pipe 11.

In the above embodiment, the present invention is applied to an example in which three upper and lower communication holes are provided, but the present invention is not limited to this, and the present invention is not limited to this, but may be applied to cases where the number of communication holes is three or more, The purpose remains unchanged in any of the following cases.

(Effects of the invention) As detailed above, according to the invention, a tube element having a tank portion at both ends and a passage portion communicating between the tank portions and a corrugated fin are alternately stacked in multiple stages, In a stacked evaporator in which an end plate is arranged outside an outermost tube element, a portion of the end plate corresponding to a communication hole formed in a tank portion of the tube element is bent inward to protrude. Since the end plate is reinforced by fitting the protrusion into the communication hole of the tube element adjacent to the end plate, the section modulus of the protrusion part of the end plate, that is, the part that corresponds to the communication hole formed in the tank part becomes large. The strength of the end plate against internal pressure is increased, and there is no need to install reinforcing plates etc. from a processing perspective, which reduces the number of parts and processing man-hours, reducing the burden in terms of ease of assembly and economy. be done. Furthermore, when a reinforcing plate is attached to an end plate by brazing as in the conventional case, there is no risk of leakage of refrigerant due to peeling of the plate due to freezing of condensed water caused by breakage of the solder or the like.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of a laminated evaporator according to the present invention, Fig. 2 is a front view of a molded plate, and Fig. 3 is a front sectional view of a laminated evaporator according to the present invention.
The drawings are a left side view of FIG. 1, FIG. 4 is a right side view of the same, and FIG. 5 is a view showing a state in which the end plate according to the present invention is fitted to the molded plate. 1... Laminated evaporator, 2... Corrugated fin, 3, 4... End plate, 6, 7... Tank part,
8... Passage section, 9a to 9c, 10a to 10c...
Communication hole, A...Tube element.

Claims (1)

[Scope of utility model registration request] A tube element having a tank portion at both ends and a passage portion communicating between the tank portions and corrugated fins are alternately stacked in multiple stages,
In a stacked evaporator in which an end plate is arranged outside an outermost tube element, a portion of the end plate that corresponds to a refrigerant passage communication hole formed in a tank portion of the outermost tube element is bent inward. By doing so, the protrusion is fitted into the refrigerant passage communication hole of the outermost tube element adjacent to the end plate, thereby reinforcing the end plate and closing the communication hole. Stacked evaporator.