KR100518885B1 - Structure for fixing rexam heater of refrigerator - Google Patents

Abstract

The present invention relates to a planar heater fixing structure of the refrigerator, which is fixed to the front and rear of the evaporator through the combination of the heater fixing device formed on both front and rear ends of the evaporator and both ends of the planar heater, Defrosting of the planar heater is performed smoothly, such as removing frost formed on the evaporator by the heater heat transferred from the closely contacted planar heater to the evaporator, thereby improving the defrosting efficiency and heat transfer performance of the evaporator.

In addition, since the surface heater is fixed to the front / rear surface of the evaporator through the heater fixing device, since the heater heat generated from the surface heater is directly acted on the evaporator, the power consumption of the refrigerator according to the defrosting operation is greatly increased. In addition to the excellent effect that can be reduced, there is also an excellent effect to prevent the temperature rise inside the refrigerator.

Description

Structure for fixing rexam heater of refrigerator

The present invention relates to a refrigerator, and more particularly, a surface heater is tightly fixed to the front and rear surfaces of the evaporator through a combination of heater fixing devices formed at both ends of the front and rear surfaces of the evaporator and both ends of the surface heater. The surface heater fixing structure of the refrigerator to remove the frost formed on the evaporator by the heater heat transmitted to the.

In general, the refrigerator discharges cold air generated by a refrigeration cycle composed of a compressor, a condenser, an expansion valve, an evaporator, and lowers the temperature in the refrigerator to freeze or refrigerate food and the like. As shown in FIG. 1, the main body 100, a freezing chamber 110 and a refrigerating chamber 120 for freezing and refrigerating loads (food) by dividing up and down inside the main body 100, and the main body 100. The refrigerator compartment door 130 and the refrigerator compartment door 140, which are mounted at one side of the refrigerator, to open and close the freezer compartment 110 and the refrigerating compartment 120, and cold air necessary for cooling the freezer compartment 110 and the refrigerating compartment 120 may be generated. It consists of a refrigeration cycle equipment consisting of a compressor 150 and a condenser (not shown), an expansion valve (not shown), and an evaporator 160 forming a refrigeration cycle.

In addition, the cold air generated through the evaporator 160 to take the ambient heat of the elements of the refrigeration cycle equipment to evaporate the refrigerant in the gas phase state to each shelf 170 of the freezer compartment 110 and the refrigerating compartment 120. Cold air discharge ports 190 and 190a are formed in the inner wall 180 of the rear surface of the freezing chamber 110 and the refrigerating chamber 120 to be discharged.

In the refrigerator configured as described above, the refrigerant, which is phase-changed in a low temperature low pressure gas phase by the evaporator 160, flows to the compressor 150 and is compressed from the low temperature low pressure to the high temperature high pressure through the compressor 150, and the compressed high temperature high pressure The gas phase refrigerant is cooled and condensed in the course of passing through the condenser, and is phase-changed to a high-pressure liquid state. The refrigerant, which has been phase-changed into a high-pressure liquid state, is easily evaporated by heat exchange in the evaporator 160 while passing through an expansion valve. After decompression (heat expansion), the refrigerant flows to the evaporator 160 where the evaporation process is performed. As described above, the refrigerant introduced into the evaporator 160 absorbs heat inside the refrigerator and absorbs heat inside the refrigerator. After the phase change to the state to cool the air around it, it forms a refrigeration cycle flowing back into the compressor 150.

At this time, the air (chill) cooled while the heat is lost to the refrigerant through heat exchange with the evaporator 160 is driven by the blower fan 200 installed on the evaporator 160, the freezing chamber 110 and the refrigerating chamber 120. The temperature of the freezing compartment 110 and the refrigerating compartment 120 is lowered as the discharge air is circulated through the cold air discharge ports 190 and 190a formed in the rear inner wall 180.

On the other hand, in the case of the evaporator 160 to take the heat of the ambient air to evaporate the refrigerant in a gaseous state, as shown in Figure 2, the plurality of tubes 161 and the tube 161 through which the refrigerant flows A plurality of pins 162 fixed to a surface of the at a predetermined interval, a tube bracket 163 fixed to both ends of the tube 161 to prevent the flow of the tube 161, and the tube bracket 163. It is installed at the lower end, and consists of a defrost heater 164 for defrosting the frost formed on the tube 161 and the fin 162 by the temperature difference between the cold and the refrigerant recirculated through the inside of the furnace, the freezing chamber Each of the cold air whose temperature is increased by circulating the 110 and the refrigerating chamber 120 (cold and humid cold air mixed with external air during frequent opening and closing of the refrigerator door) is supplied to the evaporator 160 through the cold air duct 210 again. When re-cooled, the freezer compartment 110 and the refrigerating compartment 120 In this case, frost is formed on the tube 161 and the fin 162 by the temperature difference between the coolant flowing back into the evaporator 160 and the refrigerant flowing in the evaporator 160 tube 161. When frost is formed on the tube 161 and the fin 162 as described above, after stopping the refrigeration cycle of the refrigerator in operation, a defrost heater installed at the bottom of the evaporator 160, that is, the bottom of the tube bracket 163 ( By applying power to the 164, a defrosting operation is performed to remove frost formed on the evaporator 160 through an exothermic action of the defrost heater 164.

However, as described above, in the case of the defrost heater 164 used in the defrosting operation, that is, the sheath heater, the heater heat is not evenly applied to the entire evaporator 160 when the heat is generated, but only to the lower portion of the evaporator 160. Along with the big problem that the defrosting portion of the evaporator 160 is limited, such as a function, it takes a certain time before the heater heat is applied to the evaporator 160 as a whole, so that the power consumption of the refrigerator is greatly increased. There was a big problem.

Furthermore, since the power density (Watt Density) of the defrost heater 164 is high, the resulting surface temperature is raised to about 600 ℃ or more, the evaporator 160 tube 161 by the temperature of the defrost heater 164 There was also a big problem such as the risk of explosion of refrigerant (environmentally friendly alternative refrigerant R-600a: ignition temperature 494 ° C) in the air).

In order to solve this problem, a defrost heater of the refrigerator, which is published on September 15, 1999, Republic of Korea Utility Model Publication No. 1999-36171 has been provided, which is, as shown in Figure 3, evaporator 360 tube bracket ( Fixing means 364 each formed by bending both edges of the 363 and the lead line 366 to which the power of the refrigerator is applied are connected to one end, and the one side has high heat by power applied through the lead line 366. The heat generating unit 367 is formed to generate a heat insulating portion 368 is formed on the other side is composed of a planar heating element 365 is installed at predetermined intervals on the front and rear of the evaporator 360.

In the case of the planar heating element 365, the evaporator 360 is inserted to be spaced apart at predetermined intervals on the front and rear of the evaporator 360 through fixing means 364 formed at both corners of the tube bracket 363. In addition, the defrosting portion of the evaporator 160 is limited as in the conventional defrosting heater 164, whereas the defrosting efficiency of the evaporator 360 is increased as the defrosting portion is expanded to the entire evaporator 360. ), The surface temperature of the defrost heater 164 or the temperature of the conventional defrost heater 164 or internationally regulated only for about 80 to 100 ℃ lower than significantly lower than the temperature regulated for the ignition safety of the refrigerant, accordingly evaporator ( 360) The risk of refrigerant explosion in the tube 361 is removed, and thus the safety of the refrigerant according to the defrosting operation is greatly secured.

However, in the case of the planar heating element 365, the evaporator 360 is inserted through fixing means 364 formed at both corners of the tube bracket 363 and spaced apart at predetermined intervals on the front and rear surfaces of the evaporator 360. Since the heat conduction characteristics from the planar heating element 365 to the evaporator 360 are greatly lowered, the defrosting efficiency of the evaporator 360 is lowered, thereby fully utilizing the advantages of the planar heating element 365. There was a great problem of not being able to.

In addition, as described above, the plane heating element 365 is spaced apart on the front and rear of the evaporator 360, which is also a power consumption of the refrigerator according to the time it takes a certain time before the heat of the heater acts on the entire evaporator 360 There was also a huge problem of increasing.

In order to solve the above problems, the present invention, the front and rear of the evaporator through the combination of the heater fixing device formed on both ends of the surface heater, the surface heater on the front and rear of the evaporator in close contact with each other, The purpose of the present invention is to improve the defrosting efficiency and heat transfer performance of the evaporator as the defrosting operation of the surface heater is performed smoothly, as described above, by removing the frost formed on the evaporator by the heater heat transferred from the closely contacted heater to the evaporator. have.

In addition, since the surface heater is fixed to the front / rear surface of the evaporator through the heater fixing device, since the heater heat generated from the surface heater is directly acted on the evaporator, the power consumption of the refrigerator according to the defrosting operation is greatly increased. There is another purpose to be able to reduce it.

The object of the present invention is to form a heater fixing device at each end of the front and rear and the surface heater of the evaporator, so that the surface heater is tightly fixed to the front and rear of the evaporator through the combination of the heater fixing device. The bar can be solved by the heater fixing structure, it will be described in detail with reference to the accompanying drawings.

Figure 4 shows a schematic perspective view of the surface heater is fixed to the front / rear of the evaporator in close contact with the heater fixing device of the present invention, Figure 5 shows a side view and a front, rear view of the evaporator according to the present invention.

The planar heater fixing structure of the present invention, in the structure for fixing the planar heater 464 to the front / rear of the evaporator (460);

The heater heater 464 is formed by coupling the heater fixing device 467 by forming heater fixing devices 467 corresponding to both ends of the front and rear surfaces of the evaporator 460 and both ends of the surface heater 464. It is configured to be in close contact with the front and rear of the evaporator 460.

Hereinafter, the planar heater fixing structure of the present invention will be described in detail.

The planar heater fixing structure of the present invention smoothly removes frost formed on the evaporator 460 by heater heat transferred from the planar heaters 464 in close contact with each other, thereby defrosting the evaporator 460. In order to improve the efficiency and heat transfer performance, and to significantly reduce the power consumption of the refrigerator according to the defrosting operation, the heater fixing device at both ends of the front and rear and the surface heater 464 of the evaporator 460. By forming the 467 and the heater heater 464 in close contact with the front and rear of the evaporator 460 through the coupling of the heater fixing device 467, the present invention will be described in detail. The same reference numerals will be applied to the same configurations as those of the present invention and the conventional art described above.

In the case of the evaporator 460 to which the present invention is applied, an evaporator 160 having a fin-tube type having the same configuration as the conventional evaporator shown in FIG. 2 or an evaporator having a pre- filed as of March 19, 2003 of the applicant (application number 2003-17167) (460) can be used, and in the present invention, instead of the conventional evaporator 160 structure, the evaporator (application number 2003-17167) 460 applied by the applicant of the present application is applied, In particular, in order to be able to smoothly remove the frost formed on the evaporator 460 through the heat conduction property that the heat generated during the defrost operation of the evaporator 460 directly acts on the evaporator 460, the evaporator 460 A heater fixing device 467 corresponding to a predetermined position of the front / rear predetermined position of the planar heater 464 and the planar heater 464 are formed by coupling the heater fixing device 467 to the evaporator 460. As fixed to the front and back of the In contrast, the configuration thereof will be described with reference to FIG. 4.

As shown in FIG. 4, the evaporator 460 structure to which the present invention is applied comprises a plurality of tubes 461 through which a refrigerant flows, and a louver ring after being integrally extruded between the tubes 461 and 461. An evaporator 460 consisting of a fin 462 formed to have a predetermined angle through processing, and tube brackets 463 fixed to both ends of the tube 461 to prevent flow of the tube 461; A surface heater 464 that is tightly fixed to the front and rear surfaces of the evaporator 460 to defrost frost formed on the tube 461 and the fin 462 due to the temperature difference between the coolant and the refrigerant circulated again through the inside of the furnace. It consists of).

At this time, the fin 462 is inclined by about 70 to 75 degrees along the longitudinal direction of the tube 461 through louvering so that air can pass through the center of the fin forming portion of the tube 461. At the same time, they are formed continuously at predetermined intervals.

In addition, the planar heater 464 is composed of a heat generating surface 465 and a heat insulating surface 466 opposite to the heat generating surface 465 closely fixed to the front / rear of the evaporator 460, the heat generating surface ( The heat wire is arranged in a zigzag form to generate heat, and the heat insulating surface 466 is bonded or coated with a heat insulating material (not shown) having a large heat shield, so that the heater heat of the heat generating surface 465 is increased. This is to prevent the outside of the planar heater 464 and around the evaporator 460 through the insulating surface 466.

In addition, the coupling between the evaporator 460 and the planar heater 464 is through the fastening of the heater fixing device 467 formed to correspond to both ends of the front and rear of the evaporator 460 and both ends of the planar heater 464. Surface heater 464 is coupled to the front / rear of the evaporator 460 is fixed, the heater fixing device 467 for this is as follows.

As shown in FIGS. 4 and 5, the heater fixing device includes a front / back side of the evaporator 460 so that the heating surface 465 of the planar heater 464 can be accurately positioned before / after the evaporator 460. A coupling protrusion 468 formed at both ends of the rear surface to protrude to a predetermined length; It is composed of a coupling hole 469 formed through both ends of the planar heater 464 to be correspondingly coupled to the coupling protrusion 468.

In this case, the coupling protrusion 468 may be formed in various shapes such as a rectangular or trapezoid of a predetermined length, and in particular, the surface heater 464 fixed to the front / rear of the evaporator 460 above the coupling protrusion 468. The locking step 468a is formed so as to prevent the separation.

In addition, looking at the formation position of the engaging projection 468 protruding before / behind the evaporator 460, the coupling projection 468 is, as shown in Figure 5 (a), before the evaporator 460 It is formed on the same position on the rear / rear, in particular when the coupling of the planar heater 464, the planar heater 464 respectively installed on the front and rear of the evaporator so that the installation projections can be installed in the correct position without being inverted each other As shown in FIG. 5 (b), the formation position of the 468 is formed in a zigzag form only on the front side of the evaporator 460, or as shown in FIG. 5 (c), the evaporator 460 By forming the zigzag only on the rear surface, when the planar heater 464 is coupled, the planar heaters 464 respectively installed on the front and rear surfaces of the evaporator 460 may be installed at the correct positions without being reversed.

In addition, in the case of the coupling hole 469 formed through both ends of the planar heater 464, the coupling protrusion 468 protruding from the front / rear surface of the evaporator 460 as shown in FIG. The coupling protrusion 468 formed on the same position as each other, such as the coupling protrusion 468 formed on the same position on the front and rear surfaces of the evaporator 460, or illustrated in FIGS. 5B and 5C. The coupling hole 469 may be formed in a zigzag form only in the planar heater 464 installed at the front or rear of the evaporator 460 so as to be correspondingly coupled thereto.

As described above, the process of closely fixing the surface heater to the front / rear of the evaporator and the process of thermal conduction from the surface heater fixed to the front / rear of the evaporator to the evaporator are as follows.

Figure 6 is a state diagram showing the thermal conductivity of the planar heater fixed to the front / rear of the evaporator of the present invention.

First, a process for closely fixing the surface heater 464 to the front and rear of the evaporator 460, first, to prevent the flow of the tube 461 both front and rear of the evaporator 460, that is, the tube 461. E) the evaporator by correspondingly coupling the coupling holes 469 formed through both ends of the planar heater 464 to the coupling protrusions 468 protruding from both front and rear ends of the tube bracket 463 fixed at both ends, respectively. The planar heater 464 is tightly fixed to the front and rear surfaces of the 460. At this time, in the case of the planar heater 464, the engaging protrusion 468 protruding from the front and rear surfaces of the tube bracket 463 is caught. When the coupling hole 469 of the planar heater 464 is caught on the jaw 468a, even if an impact or vibration applied from the outside is applied, the jaw 468a is firmly fixed without being separated from the front and rear surfaces of the evaporator 460.

Next, the evaporator 460 is circulated by the temperature difference between the coolant flowing back into the evaporator 460 by circulating through the freezer compartment 110 and the refrigerating chamber 120 and the refrigerant flowing through the tube 461 of the evaporator 460. When the frost is formed on the tube 461 and the fin 462 of the), after stopping the refrigeration cycle operation during operation, the engaging projection 468 and the surface heater 464 before and after the evaporator 460 The heat is generated from the planar heater 464 by applying power to the planar heater 464 fixed to the front and rear of the evaporator 460 through the coupling with the coupling hole 469 of the planar heater. Heat generated from 464 is transferred directly to the evaporator 460 through conduction and convection, as shown in FIG. 6, and frost formed on the tubes 461 and fins 462 of the evaporator 460. Defrosting is done to remove the.

In particular, in the defrosting operation as described above, the heat of the surface heater 464 tightly fixed to the front and rear surfaces of the evaporator 460 has a risk of explosion in the refrigerant flowing in the tube 461 of the evaporator 460. Defrost work is done safely without giving.

Figure 7 shows another embodiment of the heater fixing device according to the present invention, which is, as shown in Figure 7, when the evaporator 560 and the planar heater 564, 564a, the combination of the evaporator 560 The front side coupling protrusions 568 and the rear side coupling protrusions 568a of the evaporator 560 are mutually installed so that the surface heaters 564 and 564a respectively installed on the front and rear sides are installed at the correct positions without being inverted. It is a configuration formed in a zigzag form.

In particular, the coupling holes 569 and 569a of the planar heater 564 may also be coupled to the coupling protrusions 568 and 568a so as to correspond to the coupling protrusions 568 and 568a. The surface heaters 564a are formed in a zigzag shape with each other.

Figure 8 shows another embodiment of the heater fixing device according to the present invention, it is configured by applying the adhesive member 470 on the heating surface 465 of the planar heater 464. By the above configuration, the surface heater 464 is adhesively fixed to the front and rear surfaces of the evaporator 460 by the adhesive member 470 applied on the heating surface 465 of the surface heater 464. In addition, the coupling protrusion 468 of the front / rear of the evaporator 460, which is the heater fixing device 467, and the coupling groove 469 of the planar heater 464, the front / rear of the evaporator 460. The surface heater 464 is fixed. Therefore, the coupling force of the planar heater 464 fixed to the front and rear of the evaporator 460 is increased.

The fixed structure of the planar heater configured as described above is not only a top-type refrigerator applied as an embodiment of the present invention but also a bottom-type refrigerator in which a refrigerating compartment is located at the top and a freezer compartment is at the bottom. Note that the refrigerator and the freezer and the refrigerating compartment may be applied to a side by side type refrigerator located at the left / right side of the main body.

The surface heater fixing structure of the present invention refrigerator, the surface heater in close contact with each other by fixing the surface heater to the front / rear of the evaporator through the combination of the heater fixing device formed on both ends of the front and rear and the surface heater of the evaporator. The defrosting of the planar heater is performed smoothly, such as removing frost formed on the evaporator by the heater heat transferred from the evaporator to the evaporator, thereby improving the defrosting efficiency and heat transfer performance of the evaporator.

In addition, since the surface heater is fixed to the front / rear surface of the evaporator through the heater fixing device, since the heater heat generated from the surface heater is directly acted on the evaporator, the power consumption of the refrigerator according to the defrosting operation is greatly increased. In addition to the excellent effect that can be reduced, there is also an excellent effect to prevent the temperature rise inside the refrigerator.

1 is a schematic cross-sectional view of a typical refrigerator.

Figure 2 is a schematic perspective view of the sheath heater is installed in the defrost heater at the bottom of the conventional evaporator.

Figure 3 is a schematic perspective view of the surface heater is installed in the defrost heater on the front and rear of the conventional evaporator.

Figure 4 is a schematic perspective view of the surface heater is tightly fixed to the front / rear of the evaporator through the heater fixing device of the present invention.

Figure 5 is a side view and a positive, rear view of the evaporator according to the present invention.

Figure 6 is a state diagram showing the thermal conductivity of the planar heater fixed to the front / rear of the evaporator through the heater fixing device of the present invention.

7 is another embodiment of a heater fixing device according to the present invention.

8 is yet another embodiment of a heater fixing device according to the present invention.

Explanation of symbols on main parts of drawing

160, 360, 460, 560. Evaporators 161, 361, 461. Tubes

162, 362, 462. Pins 163, 363, 463. Tube bracket

164. Defrost heater 364. Fixing means

365, 464, 564, 564a. Planar heater (flat heating element)

367, 465. Heating part (face) 368, 466. Heat insulation part (face)

467. Heater fixings 468, 568, 568a. Engaging protrusion

468a. Jaws 469, 569, 569a. Joining hole

470. Adhesive members

Claims (7)

In the structure for installing and fixing the surface heater on the front and rear of the evaporator; Forming a heater fixing device corresponding to both ends of the front and rear of the evaporator and the both ends of the surface heater, the surface heater is fixed to the front and rear of the evaporator by the coupling of the heater fixing device of the refrigerator Surface heater fixing structure. The apparatus of claim 1, wherein the heater fixing device comprises: a coupling protrusion protruding from both ends of the front and rear surfaces of the evaporator so that the heating surface of the planar heater is accurately positioned before and after the evaporator; The surface heater fixing structure of the refrigerator, characterized in that the coupling holes formed through the both ends of the surface heater so as to be correspondingly coupled with the coupling projection. The planar heater fixing structure according to claim 2, wherein a latching jaw is formed on the latching protrusion to prevent separation of the planar heater fixed to the front and rear surfaces of the evaporator. The evaporator according to claim 2 or 3, wherein the coupling protrusion is installed at the front or rear of the evaporator so that the heaters installed at the front and rear of the evaporator can be installed at the correct positions without being inverted. Surface heater fixing structure of the refrigerator, characterized in that formed only in a zigzag form. The front side coupling protrusion and the rear side coupling of the evaporator of claim 2 or 3, wherein the surface heaters respectively installed on the front and rear surfaces of the evaporator can be installed at the correct positions without inverting each other. Surface heater fixing structure of the refrigerator, characterized in that the projections are formed in a zigzag form. According to claim 2 or 3, wherein the coupling hole is formed in a zigzag form only in the surface heater that is installed on the front or rear of the evaporator to be correspondingly coupled with the engaging projection, or the front side surface heater and the rear side surface of the evaporator Surface heater fixing structure of the refrigerator, characterized in that formed between each other in a zigzag form. The planar heater fixing structure according to claim 1 or 2, wherein an adhesive member is coated on a heating surface of the planar heater to increase the bonding force of the planar heater fixed to the front and rear surfaces of the evaporator.