JP2005016879A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator with a condenser and a vacuum heat insulating material arranged in a urethane heat insulating material between an outer box and an inner box, increasing the heat radiating effect of the condenser and the heat absorbing amount reducing effect of the vacuum heat insulating material and improving the efficiency of assembling work. <P>SOLUTION: The condenser 18 is arranged between an outer box flat plate 16 and the vacuum heat insulating material 17 and pasted to each other with an adhesive member to form an integrated panel which is arranged on at least either side face of the outer box. Thus, the heat of the condenser 18 is efficiently transferred to outside air, improving heat radiating capability. The vacuum heat insulating material 17 is pasted at a maximum to the condenser 18 to partition the inside, greatly reducing the quantity of heat entering from the condenser 18. The outer box flat plate 16, the condenser 17 and the vacuum heat insulating material 18 are formed into the integrated panel, improving workability when assembling the outer box. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator including a heat insulating box formed of a foam heat insulating material.
[0002]
[Prior art]
In recent years, as the demand for increasing the capacity of a refrigerator and reducing the installation space increases, a vacuum heat insulating material is provided in the refrigerator heat insulating wall to improve heat insulating performance (see, for example, Patent Document 1).
[0003]
Hereinafter, the conventional refrigerator will be described with reference to the drawings.
[0004]
FIG. 9 shows a schematic cross-sectional view of a conventional refrigerator. As shown in FIG. 9, the conventional refrigerator 1 is foam-filled between the outer box 2 that forms the outer wall of the refrigerator 1, the inner box 3 that forms the inner wall of the refrigerator, and the outer box 2 and the inner box 3. A heat insulating box 6 comprising a vacuum heat insulating material 4, a vacuum heat insulating material 5 disposed in the urethane heat insulating material 4, and a refrigerator cooling device (not shown) condenser disposed in the urethane heat insulating material 4 of the heat insulating box 6. 7, and further, the heat insulating box 6 is vertically divided by a first partition wall 8 and a second partition wall 9 to form a refrigerator compartment 10, a freezer compartment 11, and a vegetable compartment 12, respectively.
[0005]
The vacuum heat insulating material 5 is composed of a jacket bag made of a film having a multi-layer laminate structure that prevents gas permeation, and a core material made of fine powder such as silica and pearlite or inorganic fibers. The gas (air) in the bag is evacuated, vacuumed and sealed with a heat seal. The heat conductivity of the vacuum heat insulating material 5 is 0.008 to 0.0025 W / m · K, which is very excellent in heat insulation performance. Even if the wall thickness of the box 6 is reduced, the amount of heat entering the interior can be effectively reduced. Moreover, the fixing place of the vacuum heat insulating material 5 is attached to the relatively flat inner surface of the outer box.
[0006]
Since the condenser 7 disposed in the urethane heat insulating material 4 becomes high temperature during operation of the cooling device, the condenser 7 is attached to the inner surface of the outer box in order to secure heat radiation capability and reduce the amount of heat entering the cabinet. Yes. Further, by attaching to the outer box side, the heat generated by the condenser 7 is transmitted to the surface of the outer box 2 and prevents the surface from being dewed.
[0007]
Thus, since both the vacuum heat insulating material 5 and the condenser 7 are arranged on the inner side of the outer box, a structure in which the condenser 7 is arranged around the vacuum heat insulating material so as not to disturb the mutual arrangement position as shown in FIG. Have taken.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-269177
[Problems to be solved by the invention]
However, in the conventional method, when the covering area of the vacuum heat insulating material 5 is expanded in order to reduce the heat absorption amount of the refrigerator 1, the arrangement of the condenser 7 is limited to the peripheral portion of the vacuum heat insulating material 5. The heat dissipation capacity of 7 cannot be secured sufficiently. As a result, it is difficult to lower the condensation temperature with the aim of increasing the efficiency of the refrigeration cycle.
[0010]
Further, in the conventional outer box assembling process, the side wall portion is bent and processed to form the outer box, and then the vacuum heat insulating material 5 is pasted. Since the material 5 is pasted, there is a problem that the pasting process becomes complicated and it is difficult to reduce the production cost.
[0011]
The present invention overcomes the conventional technical problems, enhances the effect of reducing the amount of heat absorbed by the vacuum heat insulating material while sufficiently securing the heat dissipation capability of the condenser, and further assembles the condenser and the vacuum heat insulating material. It aims at providing the refrigerator provided with the structure which can improve work efficiency.
[0012]
[Means for Solving the Problems]
According to the first aspect of the present invention, a condenser is disposed between a flat plate and a vacuum heat insulating material, and each of them is bonded to each other by an adhesive member, and the flat plate side of the integrated panel is set to the outside, and at least one plane is provided. And an outer box composed of the panel, an inner box forming an inner wall of the cabinet, and a heat insulating box made of urethane foam heat insulating material filled between the outer box and the inner box, and the entire panel surface The heat radiation capacity of the condenser can be ensured, and sufficient heat radiation capacity can be ensured, and the vacuum heat insulating material can be pasted in an effective size to greatly reduce the intrusion heat from the outside air and the condenser. Furthermore, it has the effect | action that the assembly work efficiency of a heat insulation box can be improved by comprising an outer box with the panel which integrated the said condenser and the said vacuum heat insulating material.
[0013]
According to a second aspect of the present invention, in the first aspect of the invention, at least one side surface of the condenser is planar, and the contact area between the condenser and the flat plate on the outside air side is increased. By doing so, it has the effect | action that the heat | fever of the said condenser can be efficiently tell | transmitted to outside air and heat dissipation capability can be improved.
[0014]
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the distance from the end face of the flat plate to the end face of the vacuum heat insulating material is within about 100 mm, and constitutes the outer box. Since the space for the joint portion of the panel can be secured and the vacuum heat insulating material can be arranged to cover the entire outer box with the maximum size, the heat absorption amount of the refrigerator can be greatly reduced. Have
[0015]
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, a connection portion between the inlet and outlet pipes of the condenser and other pipes is provided in the machine room provided at the lower back of the refrigerator. It is arranged and has an effect that the pipe joints increased by making the outer box into a panel can be aggregated and welding work can be performed efficiently.
[0016]
According to a fifth aspect of the present invention, in the invention of the fourth aspect, the compressor is arranged to be shifted left and right from the center of the machine room, and the condenser is arranged on the opposite side of the position where the compressor is arranged to be shifted. The connecting portion between the inlet and outlet pipes and other pipes is arranged, and has an effect that the working efficiency at the time of pipe welding can be improved by taking the distance between adjacent joint portions.
[0017]
According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the evaporating dish for receiving the defrost water of the refrigerator is arranged side by side with the compressor in the machine room, and a pipe connecting the compressor and the condenser is the evaporation. The high-temperature refrigerant discharged from the compressor is cooled with defrosted water before entering the condenser, so that the condensation temperature is prevented from becoming high. It has the effect | action that the evaporation of defrost water in can be accelerated | stimulated.
[0018]
The invention according to claim 7 is the invention according to claim 6, wherein both sides and the back of the outer box are constituted by the panel, and the condenser on the side far from the compressor from the discharge pipe of the compressor, the back The condenser is connected in order from the condenser to the condenser on the side of the compressor in order, and the piping arrangement in the machine room can be simplified, so the space in the machine room is saved and the pipe length is minimized. It has the effect that it can be made.
[0019]
The invention according to claim 8 is the invention according to claim 7, wherein a pipe welding portion in the machine room is arranged away from the panel, and heat at the time of welding is transmitted to the panel side through the pipe, It has the effect that the bag of vacuum heat insulating material becomes hot and can be prevented from deteriorating.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a refrigerator according to the present invention will be described with reference to the drawings.
[0021]
(Embodiment 1)
FIG. 1 is an exploded view of an outer box constituting a heat insulation box of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is an external inclination view of the refrigerator according to the embodiment, and FIG. 3 is heat insulation of the refrigerator according to the embodiment. 4 is a cross-sectional view of the box, FIG. 4 is a configuration diagram of the air path of the refrigerator according to the embodiment, FIG. 5 is a refrigeration cycle diagram of the refrigerator according to the embodiment, and FIG. 6 is a machine room at the lower back of the refrigerator according to the embodiment. FIG. 7 is a box cross-sectional view of a refrigerator using a condenser constituted by a thin tube according to the embodiment, and FIG. 8 is a diagram of a refrigerator using a condenser constituted by a corrugated plate according to the embodiment. It is box body sectional drawing.
[0022]
The refrigerator 15 according to the first embodiment includes an outer box panel 19 including an iron outer box flat plate 16, a vacuum heat insulating material 17, and a condenser 18, a hard resin inner box 20, and foaming between the outer box panel 19 and the inner box 20. A heat insulating box 22 made of filled urethane heat insulating material 21, a refrigerator compartment door 23 and a freezer compartment door 24, a gasket 25 for sealing the heat insulating box 22, and a refrigerator compartment 27 and a refrigerator separated by an internal partition wall 26. A refrigeration room sensor 29 for detecting the temperature of the refrigeration room, a freezing room sensor 30 for detecting the temperature of the freezing room, a refrigerating room damper 31 for adjusting the cooling air to the refrigerating room, A blower fan 32 to be sent, a cooler 33 arranged on the back of the freezer compartment constituting the refrigeration cycle of the refrigerator, a machine room 34 on the lower side of the refrigerator back, a compressor 35 arranged in the machine room 34, and a decompressor Capilla A tube 36, a dryer 37 for removing moisture in the refrigeration cycle, an evaporating dish 38 for receiving defrosted water, a return pipe 39 to the compressor, a discharge pipe 40 for the compressor, between the condenser 18 and the vacuum heat insulating material 17. The flexible form 41 is arranged.
[0023]
As shown in FIGS. 1 and 3, the outer box panel 19 has a flat pipe of the condenser 18 attached to the flat plate 16 with an adhesive member, and the condenser 18 and the vacuum heat insulating material 17 have air in the gap between them. The flexible foam 41 is spread and bonded so as not to mix.
[0024]
Further, the flat tube constituting the condenser 18 improves the heat transfer coefficient inside the tube by subjecting the inner surface of the tube to a groove or cutting (not shown) with a depth of 0.1 mm to 0.2 mm. Increases heat dissipation capability.
[0025]
Moreover, the vacuum heat insulating material 17 is affixed on the position within about 100 mm from the end surface of the outer box flat plate 16 so that the space of the junction part of outer box panels may be opened.
[0026]
About the refrigerator of this Embodiment comprised as mentioned above, the operation | movement is demonstrated below.
[0027]
The condition for starting the operation of the refrigerator is when the temperature of the refrigerator compartment sensor 29 or the freezer compartment sensor 30 is equal to or higher than the ON temperature, and the condition for stopping the operation is that both the refrigerator compartment sensor 29 and the freezer compartment sensor 30 are operated. This is the case of the off temperature or lower.
[0028]
First, cooling of the freezer compartment 28 will be described. When the freezer compartment 28 rises in temperature due to intrusion heat from outside air, door opening and closing, etc., and the freezer compartment sensor 30 reaches the on temperature or higher, the compressor 35 is activated and cooling is started. The high-temperature and high-pressure refrigerant discharged from the compressor 35 is primarily cooled by passing through the discharge pipe 40 immersed in the defrosted water in the evaporating dish 38, and further on the side surface of the condenser 18 in the outer box panel 19. It flows into the back surface and the other side surface in sequence, and is cooled and liquefied by heat exchange with the iron flat plate 16 exposed to the outside air therebetween. Furthermore, moisture is removed from the liquefied refrigerant by the dryer 37 and the pressure is reduced by the capillary tube 32 which is a capillary tube. The decompressed liquefied refrigerant flows into the cooler 33, gasifies by heat exchange with the internal air, passes through the return pipe 39, and returns to the compressor 31. When the inside of the refrigerator is cooled and the temperature of the freezer compartment sensor 30 becomes the off temperature or less and the temperature of the refrigerator compartment sensor 29 becomes the off temperature or less, the operation of the compressor 35 is stopped.
[0029]
Next, cooling of the refrigerator compartment 28 will be described. Similarly to the freezer compartment 27, when the internal temperature rises and the temperature of the refrigerator compartment sensor 29 becomes equal to or higher than the ON temperature, the refrigerator compartment damper 31 in the air path between the refrigerator compartment 27 and the cooler 33 opens. The operation of the compressor 35 is started. When the cool air from the cooler 33 flows into the warehouse by the blower fan 32 and the interior air is cooled, the temperature of the refrigerator compartment sensor 29 becomes lower than the off temperature, and the temperature of the freezer compartment sensor 30 falls below the off temperature. Then, the operation of the compressor 35 is stopped. The refrigerator compartment damper 31 is fully closed when the temperature of the refrigerator compartment sensor 29 is below the off temperature, and the compressor continues to operate when the temperature of the freezer compartment is above the off temperature when the temperature of the refrigerator compartment is below the off temperature. However, the food in the refrigerator compartment is prevented from freezing so that the temperature in the refrigerator compartment does not drop further.
[0030]
Next, the attachment process of the condenser 18 will be described.
[0031]
Conventionally, when arranging the pipes constituting the condenser 18 inside the heat insulating box, the pipes are temporarily fixed with aluminum tape and then fixed with urethane foam. However, the heat insulation capacity deteriorates because the urethane insulation wraps around between the pipe and the outer box due to the floating condition of the pipe, the way the aluminum tape is applied, etc. In some cases, heat was not sufficiently given to the surface, the surface temperature was lowered, and condensation was formed on the refrigerator surface.
[0032]
In the present embodiment, the condenser 18 configured by the outer box flat plate 16 and the flat pipe and the vacuum heat insulating material 17 are combined in advance to form the outer box panel 19, thereby improving the efficiency during the assembly work of the heat insulating box. be able to.
[0033]
Moreover, since the outer casing flat plate 16 and the flat piping of the condenser 18 have high adhesion, heat conduction from the refrigerant in the condenser 18 to the outer casing flat plate 16 is promoted, and the heat dissipation capability of the condenser 18 can be improved. it can.
[0034]
Further, as shown in FIG. 6, the inlet and outlet pipes of the condenser 18 are discharged into the machine chamber 34, and the compressor 35 is disposed at a position shifted left and right from the center, which is opposite to the position where the compressor 35 is disposed. By providing the pipe joint portion 42 in the direction space portion, the pipe joint portions increased by forming the outer box as a panel as in this embodiment are aggregated, and the distance between the adjacent connection portions is taken to weld the pipe Workability has been improved.
[0035]
Further, the discharge pipe 40 of the compressor 35 is soaked in the defrosted water in the evaporating dish so that the high-temperature refrigerant discharged from the compressor 35 is cooled and condensed with the defrosted water before entering the condenser. The temperature can be prevented from becoming high, and evaporation of defrost water can be promoted.
[0036]
Further, by connecting the condenser 18 in the outer box panel 19 in order from a position far from the compressor 35, the arrangement can be simplified so that the pipes in the machine chamber 34 do not overlap each other. The space of the chamber 34 can be saved and the piping length can be minimized.
[0037]
Further, the pipe welded portion 42 between the condensers 18 and other cycle components (for example, a dryer 37 and an electric valve such as a switching valve that switches a refrigerant flow path although not described in the present embodiment) are connected to the outer box panel 19. By disposing it at a position where the high heat at the time of welding does not affect it, the heat at the time of welding is transferred to the outer box panel 19 side through the piping, and the bag of the vacuum heat insulating material 17 becomes high temperature (about 100 ° C. or more). To prevent deterioration.
[0038]
Moreover, as shown in FIG. 1, the space required for the joining part at the time of the assembly of the outer box panel 19 which comprises an outer box by arrange | positioning the vacuum heat insulating material 17 in the part within about 100 mm from the end surface of the outer box flat plate 16 is carried out. It is possible to arrange the vacuum heat insulating material 17 so as to cover the entire outer box with the maximum size, while ensuring the workability, and to prevent the vacuum heat insulating material 17 from being scratched during assembly. The amount of heat can be greatly reduced.
[0039]
Furthermore, since the condenser 18 and the vacuum heat insulating material 17 are arranged so as to cover the inside of the heat insulating wall, the vacuum heat insulating material 17 is attached so as to partition the condenser 18 and the inside of the cabinet, so that the condenser 18 The amount of heat entering the cabinet has also been greatly reduced.
[0040]
Moreover, in the attachment of the vacuum heat insulating material 17, the flexible foam 41 is arranged on the inner box side of the condenser 18 as shown in FIG. 3, and the gap between the condenser 18 and the vacuum heat insulating material 17 is adhered without a gap. In this case, air remains and the air is prevented from expanding and contracting due to temperature fluctuations to deform the outer case.
[0041]
Instead of the flexible foam 41, an adhesive member may be applied and adhered between the condenser 18 and the vacuum heat insulating material 19 without any gap. In this case, since the condenser 18 and the vacuum heat insulating material 19 are more closely bonded, a urethane flow path in the heat insulating wall thickness is secured, and the urethane unfilled portion (void) can be reduced.
[0042]
The shape of the condenser 18 may be a specification using a thin tube 42 having an outer diameter of 2 to 3 mm and an inner diameter of 1 to 2 mm as shown in FIG. In that case, the wall thickness of the heat insulating box 22 can be reduced by reducing the thickness of the condenser 18 by using the small diameter tube 42. Furthermore, the adhesiveness between the vacuum heat insulating material 17 and the condenser 18 can be improved, and urethane or air can be prevented from coming around and peeling between them.
[0043]
In addition, about the shape of the condenser 18, as shown in FIG. 8, the specification which stuck the flat plate 16 and the plate 43 which processed the waveform, and made the clearance gap formed between the flat plates the refrigerant | coolant flow path may be sufficient. In that case, the heat radiation capacity can be improved by increasing the surface area of the refrigerant flow path, and the fixing can be facilitated by increasing the degree of adhesion between the vacuum heat insulating material 17 and the condenser 18.
[0044]
【The invention's effect】
As described above, the invention according to claim 1 is arranged such that the condenser is disposed between the flat plate and the vacuum heat insulating material, and the flat plate side of the panel integrated with each other is bonded by an adhesive member, It is composed of an outer box composed of at least one plane with the panel, an inner box that forms the inner wall of the cabinet, and a heat insulating box made of a urethane foam heat insulating material filled between the outer box and the inner box. Heat dissipation capability can be ensured, and intrusion heat from the outside air and the condenser can be greatly reduced. Furthermore, the assembly work efficiency of the heat insulation box can be improved.
[0045]
Further, the invention according to claim 2 is the invention according to claim 1, wherein at least one side surface of the condenser is planar, efficiently transferring heat of the condenser to the outside air, and providing heat dissipation capability. Can be improved.
[0046]
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the distance from the end face of the flat plate to the end face of the vacuum heat insulating material is within about 100 mm, and constitutes an outer box. The heat absorption amount of the refrigerator can be greatly reduced while securing the space of the joining portion of the panel.
[0047]
Further, the invention according to claim 4 is the machine according to any one of claims 1 to 3, wherein a connection portion between the condenser inlet and outlet pipes and the other pipes is provided in the lower part of the back of the refrigerator. It is arranged indoors, and the pipe joints that have been increased by making the outer box into a panel can be consolidated to perform the welding work efficiently.
[0048]
According to a fifth aspect of the present invention, in the invention of the fourth aspect, the compressor is shifted from the center of the machine room to the left and right, and condensed on the side opposite to the position where the compressor is shifted. The connection portion between the inlet and outlet pipes of the vessel and the other pipes is arranged, and the working efficiency at the time of pipe welding can be improved by taking the distance between adjacent joint portions.
[0049]
The invention according to claim 6 is the invention according to claim 5, wherein an evaporating dish for receiving defrosted water from the refrigerator is arranged side by side with the compressor in the machine room, and a pipe connecting the compressor and the condenser is provided. It is immersed in the evaporating dish, and it is possible to promote the lowering of the condensing temperature and the evaporation of defrost water in the evaporating dish.
[0050]
The invention according to claim 7 is the invention according to claim 6, wherein both sides and the rear surface of the outer box are constituted by the panel, and the condenser on the side surface far from the compressor is provided from the discharge pipe of the compressor. The condenser on the back and the condenser on the side near the compressor are connected in order, and the piping arrangement in the machine room can be simplified. Can be minimized.
[0051]
The invention according to claim 8 is the invention according to claim 7, in which a pipe welding portion in the machine room is arranged away from the panel, and heat during welding is directed to the panel side through the pipe. It has the effect of preventing the bag of vacuum heat insulating material from becoming hot and deteriorating.
[Brief description of the drawings]
FIG. 1 is an exploded view of an outer box constituting a heat insulation box body of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is an external inclination view of the refrigerator according to the embodiment. Cross-sectional view of heat insulation box [FIG. 4] Airflow path configuration diagram of refrigerator of the same embodiment [FIG. 5] Refrigeration cycle diagram of refrigerator according to the same embodiment [FIG. FIG. 7 is a box cross-sectional view of a refrigerator using a condenser configured with a thin tube according to the embodiment. FIG. 8 is a refrigerator using a condenser configured with a corrugated plate according to the embodiment. Sectional view of box [Fig. 9] Schematic sectional view of conventional refrigerator [Explanation of symbols]
15 refrigerator 16 outer box flat plate 17 vacuum heat insulating material 18 condenser 19 outer box panel 20 inner box 21 urethane heat insulating material 22 heat insulating box body 34 machine room 35 compressor 38 evaporating dish 39 return pipe 40 discharge pipe 41 flexible foam 42 pipe joint Part

Claims (8)

A condenser is disposed between the flat plate and the vacuum heat insulating material, and each unit is bonded and adhered by an adhesive member. And a heat insulating box made of a urethane foam heat insulating material filled between the outer box and the inner box. The refrigerator according to claim 1, wherein at least one side surface of the condenser is planar. The refrigerator according to claim 1 or 2, wherein a distance from an end surface of the flat plate to an end surface of the vacuum heat insulating material is within about 100 mm. The refrigerator according to any one of claims 1 to 3, wherein a connection portion between the inlet and outlet pipes of the condenser and other pipes is disposed in a machine room provided at a lower part of the back surface of the refrigerator. The compressor is arranged to be shifted left and right from the center of the machine room, and the connection portion between the inlet and outlet pipes of the condenser and other pipes is arranged on the opposite side to the position where the compressor is arranged to be shifted. The refrigerator according to claim 4. 6. The refrigerator according to claim 5, wherein an evaporating dish for receiving defrosted water from the refrigerator is disposed side by side with the compressor in a machine room, and a pipe connecting the compressor and the condenser is immersed in the evaporating dish. Both sides and the back of the outer box are made up of the above panels and connected in order from the discharge pipe of the compressor to the condenser on the side far from the compressor, the condenser on the back, and the condenser on the side close to the compressor. The refrigerator according to claim 6. The refrigerator according to claim 7, wherein a pipe welding portion in the machine room is arranged away from the panel.

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