KR200413998Y1 - Heat exchanger with strain relief side plates - Google Patents

Abstract

The present invention relates to a heat exchanger having a side plate for preventing deformation due to thermal stress.

The present invention is a heat exchanger having a plurality of tubes coupled to communicate between the upper and lower tanks and the upper and lower tanks and heat dissipation fins installed between the tubes and side plates attached to the left and right sides of the upper and lower tanks. And a heat exchanger having a deformation preventing side plate, wherein the side plate has a cut hole formed therein, wherein the cut hole has a notch having corners at both sides of the cut hole, and the end of the notch faces. The direction is provided with a heat exchanger having a deformation preventing side plate, characterized in that the shape is perpendicular to the longitudinal direction of the side plate.

According to the present invention, by forming a cutting hole in the side plate of the heat exchanger to induce stress concentration and to form a vulnerable portion of the load, it is easy to deform the side plate to reduce the thermal stress generated in the other components of the heat exchanger and heat exchange It is effective to prevent deformation of the entire skeleton of the group, and the side plate is cut by itself due to stress concentration around the cutting hole and repetition of deformation according to the heat exchanger, thereby preventing thermal stress and skeleton deformation without a separate cutting process. By doing so, the work process can be reduced.

Heat exchanger, side plate, cutting hole, thermal expansion, stress concentration

Description

Heat Exchanger Provided with Side Plate for Preventing Deformation

1 is a conceptual diagram schematically showing a heat exchanger according to the prior art used in a vehicle cooling apparatus;

2 is a perspective view showing a heat exchanger having a side plate according to an embodiment of the present invention,

3a to 3c are simplified views showing the development of the side plate according to another embodiment of the present invention,

4 is a conceptual view briefly showing the thermal stress distribution curve of the side plate according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: upper tank 20: lower tank

30: tube 40: heat dissipation fin

50: side plate 51: cutting hole

The present invention relates to a heat exchanger having a side plate for preventing deformation. More specifically, by forming a cutting hole in the side plate of the heat exchanger to induce stress concentration and to form a vulnerable portion of the load to facilitate deformation of the side plate to prevent thermal stress and skeletal deformation of the heat exchanger, The invention relates to a heat exchanger having a side plate which prevents skeletal deformation of the heat exchanger by causing the side plate to be cut by itself due to repeated stress concentrations and deformations in the periphery of the cutting hole with use.

A heat exchanger is a device for exchanging heat between fluids having different temperatures. The heat exchanger is a device that transfers heat from a high temperature fluid to a low temperature fluid through a heat transfer wall, and is generally used in a heater, an air conditioner, an evaporator, a condenser, and the like.

The air conditioner used to cool the room using a cooling cycle is absorbed as the refrigerant gas, which has been compressed at high and high pressure in the compressor, is liquefied by heat exchange with the outside air in the condenser and vaporized by heat exchange with the bet in the evaporator through the expansion valve. It is an air conditioner that performs the cooling action by the heat of vaporization. For the cooling efficiency of the air conditioner, the efficiency of the condenser and evaporator in which heat exchange takes place must be high, and the heat exchanger is generally used in such condenser and evaporator.

1 is a conceptual diagram schematically showing a heat exchanger according to the prior art used in a vehicle cooling apparatus.

The heat exchanger according to the prior art comprises an upper and lower tank 1, 2, a tube 3, a heat dissipation fin 4 and a side plate 5.

The upper tank 1 and the lower tank 2 are parallel and vertically spaced apart at a predetermined interval, and a plurality of tubes 3 having a refrigerant path therein are formed between the upper tank 1 and the lower tank 2. It is installed spaced horizontally and both ends of the tube (3) are respectively coupled to the upper and lower tanks so that the upper tank (1) and the lower tank (2) communicate with each other, and promotes heat exchange of the refrigerant between each tube (3) The heat dissipation fin 4 is provided. On the left and right sides of the upper and lower tanks 1, 2, side plates 5 for protecting the heat dissipation fins 4 and maintaining the overall skeleton of the heat exchanger are arranged in parallel with the tube 3, respectively. 2) is combined.

Heat exchangers having this structure are typically bonded to each component by means of an adhesive (Clad) and then joined by brazing welding and fixed in their respective positions.

As an example of the heat exchanger used in the condenser, a process of heat exchange with the surroundings in the heat exchanger is carried out. The high-temperature and high-pressure refrigerant gas passing through the compressor flows into the upper tank 1 through a pipe, and then into the upper tank 1. The introduced refrigerant gas is introduced into the lower tank 2 through the tube 3 from the upper tank 1, and heat exchange between the refrigerant gas passing through the tube 3 and the outside air is performed. The heat of the refrigerant gas, which is a high temperature, is transferred to the outside air, and the refrigerant gas is deprived of heat, and the temperature decreases, so that condensation occurs. By increasing the contact area and the contact time of, more efficient heat exchange occurs.

In this process of heat exchange, a high temperature refrigerant gas passes through the inside of the tube 3 so that the heat exchanger undergoes thermal expansion according to temperature. Each of the components of the heat exchanger does not maintain the same temperature and Since they do not have a coefficient of thermal expansion, the thermal expansion amounts are different.

Thermal expansion is a property value that increases in proportion to the temperature, the tube 3 through which the high temperature refrigerant gas passes is maintained in a relatively high temperature state and is installed on the left and right sides of the heat exchanger so that the refrigerant gas does not pass. ) Maintains a relatively low temperature state, the thermal expansion amount of the tube 3 in the high temperature state and the side plate 5 in the low temperature state is different from each other.

Since the components of the heat exchanger are joined by brazing welding, as described above, when the thermal expansion amounts are different from each other, the entire skeleton of the heat exchanger is distorted, and each of the tubes 3 and the side plates 5 is subjected to the thermal expansion difference. Stress is generated. Therefore, the heat exchanger according to the prior art has a problem that the life is shortened and the performance falls.

As a conventional technique for solving this problem, a method for preventing skeletal deformation or thermal stress generation due to thermal expansion by cutting the interruption portion of the side plate 5 as a separate process after heat exchanger brazing welding has been used. In this case, there was a problem that the work process is complicated.

Therefore, the present invention has been devised to solve such a problem, and by forming a cutting hole in the side plate to induce stress concentration, the periphery of the cutting hole is vulnerable to the load so that the deformation of the side plate easily occurs and thus the heat exchanger To reduce the thermal stress on the other components of the heat exchanger to prevent deformation of the entire skeleton of the heat exchanger, and as the heat exchanger is used, stress concentrations and deformations are repeated around the cutting holes of the side plates, causing the side plates to be cut by themselves. It is an object to provide a heat exchanger in which skeletal deformation is prevented.

In order to achieve this object, the present invention, a plurality of tubes coupled to the upper and lower tanks and the upper and lower tanks and the heat dissipation fins installed between the tubes and the side attached to the left and right sides of the upper and lower tanks A heat exchanger having a plate, the heat exchanger having a side plate for preventing deformation, characterized in that the cutting hole is formed in the side plate, and the shape of the cutting hole is formed with notches having corners on both sides of the cutting hole, respectively. And the direction in which the end of the notch faces is a shape that is perpendicular to the longitudinal direction of the side plate.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 is a perspective view showing a heat exchanger having a side plate according to an embodiment of the present invention.

As described in FIG. 1, the heat exchanger includes a plurality of tubes 30 installed between the upper and lower tanks 10 and 20, the upper and lower tanks 10 and 20, and heat dissipation fins disposed between the tubes 30. 40 and side plates 50 installed on the left and right sides of the upper and lower tanks 10 and 20, and each component of the heat exchanger is coupled by brazing welding and fixed at each position.

The side plate 50 serves to support the entire heat exchanger skeleton and to protect the heat dissipation fin 40, and the shape of the side plate 50 is an open surface as a channel shape having a vertical cross section in the longitudinal direction of the shape of the letter "c". It is positioned to face the tube 30 and the heat dissipation fin 40, the longitudinal direction of the side plate 50 is located in parallel with the longitudinal direction of the tube 30, the both ends of the longitudinal direction is the upper and lower tanks (10, 20) Is attached by brazing welding.

Cutting hole 51 is formed in one side middle portion of the side plate 50 and the shape of the cutting hole 51 may be in the form of any closed curve in which the inclination of the tangent line continuously changes like a circle, which is preferable in the present invention. The shape of the cutting hole 51 according to the exemplary embodiment is a direction in which notches having corners (that is, portions in which the inclination of the tangent changes discontinuously) are formed on both sides of the cutting hole 51, and the notched ends of the corners face. It is preferable to make the shape become a perpendicular | vertical direction to the longitudinal direction of the side plate 50. FIG.

3a to 3c are simplified views showing the development of the side plate according to another embodiment of the present invention.

As shown in FIG. 3A, two or more, preferably two, cutting holes 51 having the same shape may be formed in the side plate 50 at a predetermined distance from the side plate 50 in the longitudinal direction. Also, as shown in FIG. 3B, two or more, preferably two, cutting holes 51 having the same shape are spaced apart a predetermined distance from the side plate 50 in a vertical direction in the longitudinal direction in accordance with an embodiment of the present invention. 2 and the center of each of the cutting holes 51 may be formed on the same vertical line with respect to the longitudinal direction of the side plate 50. In addition, as shown in FIG. 3C, four cutting holes 51 may be formed in the same shape by being spaced apart from each other by a predetermined distance in the longitudinal direction and the vertical direction of the side plate 50. In addition, the cutting holes 51 may be formed in other forms than the exemplary embodiment illustrated in FIGS. 3A to 3C.

4 is a conceptual view briefly showing the thermal stress distribution curve of the side plate according to an embodiment of the present invention.

When the tube 30 of the heat exchanger illustrated in FIG. 2 is in a high temperature state and the side plate 50 is in a low temperature state, the thermal expansion amount of the tube 30 is relatively higher than that of the side plate 50 and the side plate 50 is formed. The amount of thermal expansion of is relatively small. Therefore, the side plate 50 is subjected to a tensile force by the difference in the amount of thermal expansion between the tube 30 and the side plate 50.

The stress distribution curve of the side plate 50 subjected to the tensile force has a high density of stress around the cutting hole 51 as shown by the arrow in FIG. 4 and a stress concentration phenomenon occurs at the edge of the cutting hole 51. Therefore, since the stress is increased around the cutting hole 51, the AA vertical cross section shown in FIG. 4 passing through the center of the cutting hole 51 among the vertical cross sections of the side plate 50 becomes the most vulnerable to the tensile force. .

Therefore, when the tensile force generated by the difference in thermal expansion amount with the tube acts on the side plate 50, deformation occurs easily in the most vulnerable AA cross-section, so that the load due to thermal expansion and By reducing the deformation amount, it is possible to prevent deformation of the entire skeleton of the heat exchanger.

In addition, when the heat exchanger is used, if stress concentration is repeated in the A-A cross section and deformation according to the tensile force is repeated, cracks are generated in the A-A cross section so that the side plate 50 is broken around the A-A cross section. Therefore, the heat exchanger according to the exemplary embodiment of the present invention is configured to be cut into both sides by itself without using the side plate 50 by a separate process.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention belongs may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, heat is generated in other components of the heat exchanger by forming a cutting hole in the side plate of the heat exchanger to induce stress concentration and forming a vulnerable portion of the load, thereby easily deforming the side plate. It has the effect of reducing stress and preventing deformation of the entire skeleton of the heat exchanger. Also, as the heat exchanger is used, the side plate is cut by itself due to stress concentration around the cutting hole and repetition of deformation. And by preventing the skeleton deformation there is an effect that can reduce the work process.

Claims (4)

In a heat exchanger having a plurality of tubes coupled to the upper and lower tanks and the upper and lower tanks in communication with each other, and heat dissipation fins provided between the tubes and side plates attached to left and right sides of the upper and lower tanks, Heat exchanger having a side plate for preventing deformation, characterized in that the cutting hole is formed in the side plate. The method of claim 1, The shape of the cutting hole is formed with notches having edges on both sides of the cutting hole, respectively, and the direction toward which the end of the notch has a shape that is perpendicular to the longitudinal direction of the side plate is provided with a deformation preventing side plate heat transmitter. The method of claim 2, Two cutting holes are formed in the same shape spaced apart a predetermined distance in the vertical direction of the side plate longitudinal direction and the center of the cutting hole is located on the same vertical line with respect to the longitudinal direction of the side plate, respectively Heat exchanger with side plates. The method of claim 3, wherein Heat exchanger having a side plate for preventing deformation, characterized in that two cutting holes are formed in the same shape as the two cutting holes spaced apart from the two cutting holes in the longitudinal direction of the side plate.

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