JP5964702B2 - Refrigerator - Google Patents

Description

  The present invention relates to a refrigerator equipped with a refrigeration cycle.

  The refrigerator includes a cooling device that cools the interior of an internal space (freezer compartment, refrigerator compartment, etc.) that stores food at a low temperature in a space surrounded by a housing and a door. A cooling device used in a general refrigerator is a refrigerator using a refrigeration cycle, and includes a compressor, a condenser, a capillary tube, and an evaporator. And the said refrigerator connects these each apparatus with piping, and forms the closed circuit which enclosed the refrigerant | coolant.

  The compressor compresses a gaseous refrigerant. The compressed refrigerant is a high-temperature and high-pressure gas and flows into the condenser. In the condenser, the heat of the refrigerant flowing into the inside is released to the outside, the temperature of the refrigerant is lowered, and the refrigerant is liquefied (condensed). The liquefied refrigerant is squeezed with a capillary tube.

  The refrigerant is squeezed by the capillary tube, and the refrigerant whose flow rate is limited expands at once when it flows out of the capillary tube, changes into a mist, and flows into the evaporator. In the evaporator, the mist refrigerant takes heat from the outside (mainly air) of the evaporator and vaporizes. At this time, the air around the evaporator is deprived of heat of vaporization by the refrigerant, cooled, and becomes cold air. And the said refrigerator cools the inside of the said internal space by circulating this cold air inside the said internal space.

  In a conventional refrigerator, the casing is formed of a heat insulating box whose front is open, and the compressor is insulated from the internal space (partitioned by a heat insulating wall). Is arranged. By arranging the compressor in the machine room formed in this way, heat generated by driving the compressor is less likely to enter the internal space, and the temperature of the internal space is prevented from rising. Is possible.

  Moreover, in the said refrigerator, the wall condenser which has the refrigerant | coolant piping arrange | positioned in the inside of the both-sides faceplate and backplate of the said housing | casing in the vicinity of an outer surface is often used as the said condenser. And by flowing a high-temperature refrigerant | coolant to this wall surface condenser, the heat | fever of the said high-temperature refrigerant | coolant is discharge | released outside. In the wall condenser, the heat of the refrigerant flowing inside is released by natural heat dissipation, and the heat release amount (heat release amount of the refrigerant) may be small. In the refrigeration cycle, the cooling capacity is determined by the amount of heat released from the refrigerant. If the amount of heat released from the refrigerant is small, the cooling capacity is lowered.

  Therefore, the refrigerator is provided with a condenser different from the wall condenser, and the heat dissipation amount of the refrigerant is increased by using the condenser, thereby suppressing a decrease in the cooling capacity of the refrigeration cycle. In the refrigerator, the condenser is installed in a machine room. In order to ensure the heat radiation amount of the refrigerant, the fin-type heat exchanger is often provided with a plurality of fins arranged in parallel and provided with a pipe penetrating the plurality of fins.

  A blower for taking in air from the outside or for releasing it to the outside is arranged in the machine room. External air is taken into the machine room by driving the blower. At this time, when the air that has flowed into the machine chamber passes through the gaps between the fins of the condenser, heat exchange with the refrigerant flowing inside the condenser (pipe) (deprives heat), and the heat release amount of the refrigerant (See, for example, Japanese Patent Laid-Open No. 8-285439).

JP-A-8-285439

  In the condenser as shown in Japanese Patent Laid-Open No. 8-285439, etc., air outside the machine room is blown, so that foreign matters such as dust contained in the outside air easily adhere to the fins. . When the gaps between the plurality of fins are clogged with foreign matter, the air flow is hindered, making it difficult to secure the heat radiation amount of the refrigerant in the condenser, and the cooling capacity of the refrigeration cycle is reduced. To do.

  Although clogging of the condenser fins is resolved by regular cleaning, the cooler is always operated and is heavy and difficult to move. In addition, the equipment inside the machine room becomes hot and the danger is high. From the above, it is not easy to clean the inside of the machine room of the refrigerator.

  That is, in a refrigerator equipped with the fin-type heat exchanger as a condenser, the heat radiation amount of the refrigerant can be increased by the effect of the fins for a certain period after the operation is started. However, if the continuous operation time becomes longer, the plurality of fins are clogged by foreign matters such as dust, and the heat radiation amount of the refrigerant is reduced. Further, when the condenser is clogged, deterioration of the condenser and the blower is promoted.

  From the above, when viewed as the whole of the refrigerator, the lifetime performance of the refrigeration cycle may be reduced by adding a condenser including a fin-type heat exchanger, and cooling without the condenser It may be lower than the storage.

  Accordingly, the present invention solves the above-described problems, and an object of the present invention is to provide a refrigerator capable of efficiently cooling an internal space for storing articles at a low temperature for a long period of time with a simple configuration. And

  In order to achieve the above object, the present invention provides a refrigerator having a machine room insulated from an internal space for storing articles at a low temperature inside a housing, wherein a plurality of machine rooms are provided inside the machine room. A condenser, which is a fin-type heat exchanger in which fins are arranged, and a blower are arranged, the condenser is arranged on the discharge side of the blower, and the plurality of fins The refrigerator is arranged so that the gap between the fins in the region is narrower than the region in the lower part.

  According to this configuration, by reducing the gap between the fins in the upper region where the high-temperature refrigerant of the refrigerant pipe provided in the condenser is reduced, high heat exchange efficiency is achieved, and in the lower region, the fins By increasing the gap, adhesion of foreign matters such as dust and dirt is suppressed. Thus, by comprising, it is possible to cool internal space efficiently over a long period of time.

  The said structure WHEREIN: The said condenser is divided | segmented into the some area | region up and down, The said fin may be arranged so that a clearance gap may differ for every area | region.

  The said structure WHEREIN: The clearance gap between these fins may become large sequentially toward the downward direction.

  In the above-described configuration, the condenser has a structure in which a plurality of types of fins having different lengths are arranged in a horizontal direction, the upper portions of the plurality of fins are aligned, and the longest fins are not adjacent to each other. It may be arranged as follows.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator which can cool efficiently the internal space which carries out the low temperature preservation | save of goods with a simple structure for a long period of time can be provided.

It is sectional drawing of a refrigerator. It is a schematic piping diagram of a cooling device. It is a perspective view which shows the machine room of the refrigerator concerning this invention. It is the schematic which shows arrangement | positioning in the machine room shown in FIG. It is a figure which shows an example of the condenser used for the refrigerator concerning this invention. It is a figure which shows the other example of the condenser used for the refrigerator concerning this invention.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view of the refrigerator, FIG. 2 is a schematic piping diagram of the cooling device, FIG. 3 is a perspective view showing a machine room of the refrigerator according to the present invention, and FIG. 4 is a machine shown in FIG. It is the schematic which shows arrangement | positioning inside a chamber.

  As shown in FIG. 1, the refrigerator Rf includes a housing 1 that is a heat insulating box, a door 2 that is attached to the front of the housing 1 so as to be openable and closable, and a cooling device 3. The housing 1 is provided with three concave internal spaces (concave portions) whose front side is opened up and down. The upper space R1 is a refrigerator room for storing articles at a lower temperature than the outside, and the middle space R2 and the lower space R3 are freezer rooms for storing articles in a frozen state. The internal space is not limited to this, and in addition to these, an ice making room, a vegetable room, a greenhouse, and the like may be provided.

  The door 2 is attached to the front of the upper space R1, the middle space R2, and the lower space R3 so as to be opened and closed independently. The door 21 corresponding to the upper space R1 is a hinge door, and the doors 22 and 23 corresponding to the middle space R2 and the lower space R3 are sliding doors. Further, a packing Pk is attached to the door 2, and the casing 1 and the door 2 are hermetically sealed when the packing Pk contacts the casing 1.

  The housing 1 is a combination of a metal outer box 11, an inner box 12 serving as an inner wall of each internal space, an outer box 11 and an inner box 12, and is filled between the outer box 11 and the inner box 12. The heat insulating body 13 is provided.

  The outer box 11 is formed by bending a metal plate (for example, a steel plate) into a box. The outer box 11 has a box shape whose front side is open. The inner box 12 is attached to the opening of the outer box 11 and has a so-called dome shape when viewed from the outside when attached to the outer box 11. In the housing 1, the upper space R1, the middle space R2, and the lower space R3 are each formed by an independent inner box 12.

  Since the inner box 12 mainly includes a wall that surrounds a space for storing food, the inner box 12 is manufactured by vacuum molding of a resin such as ABS, PP, or PS.

  The heat insulator 13 is a heat insulating member that suppresses the movement of heat between the outside and the inside of the housing 1 and is also a strength member for maintaining the structural strength of the housing 1. The heat insulator 13 is made of polyurethane foam. In addition to the polyurethane foam, it is also possible to employ a foamed styrene resin, a foamed phenol resin, a foamed urea resin, or the like. The heat insulator 13 is formed by injecting a raw solution of foam heat insulating material into a space formed when the outer box 11 and the inner box 12 are combined to form a box, and filling the inside of the space with foam. .

  For molding the heat insulator 13 (foamed polyurethane), a stock solution in which cyclopentane is added as a foaming agent to a mixed solution of polyol and isocyanate is used. The heat insulator 13 is formed by injecting this stock solution into a space formed by the outer box 11 and the inner box 12 to cause a foaming reaction (dehydration reaction). Although not described in detail, the door 2 similarly has a structure in which a heat insulator is disposed between an inner box and an outer box of a box that combines an inner box and an outer box. In the refrigerator Rf, the housing 1 and the door 2 have the above-described configuration, so that the upper space R1, the middle space R2, and the lower space R3 are surrounded by the heat insulator 13, and the heat entry from the outside is suppressed. Yes.

  Moreover, the housing | casing 1 is provided with the machine room 14 by which a part of cooling device 3 is arrange | positioned in the lower part (back side of lower space R3) of a back surface. Here, the cooling device will be described with reference to the drawings. As shown in FIG. 2, the cooling device 3 includes a compressor 31, a condenser 4, a wall surface condenser 32, a dryer 33, a capillary tube 34, and an evaporator 35. And the cooling device 3 is connected cyclically | annularly in this order, and comprises the refrigerating cycle by enclosing a refrigerant | coolant inside.

  The cooling device 3 will be further described. The cooling device 3 is a heat pump for taking out cold heat by changing the phase of the enclosed refrigerant between gas and liquid. In the cooling device 3, the refrigerant that is a gas is compressed by the compressor 3, and is sent to the condenser 4 and the wall condenser 32 in a state of a high-temperature and high-pressure gas refrigerant (gas). Although the condenser 4 and the wall condenser 32 are different in installation location and structure, they are devices that release heat to the outside and change (condense) the refrigerant flowing inside from gas to liquid.

  The refrigerant absorbs heat in the internal space of the refrigerator Rf to cool the internal space, and the heat released from the wall condenser 32 is not easily transmitted to the internal space and is preferably released to the outside. . Therefore, in the refrigerator Rf, the condenser 4 is arranged inside the machine room 14 separated by the internal space and the heat insulator 13 (see FIGS. 3 and 4).

  As shown in FIG. 2, in the cooling device 3 used in the refrigerator Rf of the present invention, in order to improve the cooling capacity, in other words, between the compressor 31 and the wall condenser 32, in other words, the refrigerant is a high-temperature and high-pressure gas refrigerant. The condenser 4 is arranged in a region where In the vicinity of the condenser 4, a fan 5 (air blower) that generates an air flow is disposed (see FIGS. 3 and 4). As will be described later, the fan 5 is also used as a fan for taking outside air (low temperature air) into the machine room 14. Details of the condenser 4 and the fan 5 will be described later.

  The wall condenser 32 has a structure in which refrigerant piping is arranged at a position adjacent to the outer box 11 of the housing 1. More specifically, the wall condenser 32 is provided with piping so as to come into contact with both side surfaces of the housing 1 and the outer wall on the back surface. In the wall surface condenser 32, a right side condenser 32R, a back condenser 32B, and a left condenser 32L are connected by piping in this order. Although FIG. 1 shows the back condenser 32B, the right side condenser 32R and the left side condenser 32L are similarly arranged.

  The wall condenser 32 is in contact with the metal outer box 11, and heat from the wall condenser 32 is released to the outside through the outer box 11 when a high-temperature refrigerant flows through the wall condenser 32. Conversely, the heat insulator 13 is disposed between the wall condenser 32 and the internal spaces (R1, R2, R3), and heat from the wall condenser 32 is difficult to be transmitted to the internal space. The wall condenser 32 releases the heat of the high-temperature and high-pressure gas refrigerant to the outside of the cooling device 3. The refrigerant is cooled and liquefied (condensed) by the condenser 4 and the wall condenser 32.

  The refrigerant condensed in the condenser 4 and the wall surface condenser 32 is sent to the dryer 33. In the dryer 33, water, foreign matter, etc. mixed in the refrigerant are separated from the refrigerant. The refrigerant passes through the dryer 33 and is then sent to the capillary tube 34. The capillary tube 34 is a narrow tube and is a throttle that restricts the flow rate of the refrigerant. The refrigerant expands rapidly when it flows out of the outlet of the capillary tube 34. At this time, the refrigerant is cooled and changed into a mist (atomization). The atomized refrigerant is in a liquid phase. Then, the low-temperature mist refrigerant is sent to the evaporator 35.

  The refrigerant is vaporized by the evaporator 35. When the refrigerant evaporates, it takes heat of vaporization from the surroundings. The surface of the evaporator 35 is cooled by the heat of vaporization. The cooling device 3 cools the internal space of the refrigerator Rf with cold air generated around the evaporator 35 (air cooled by heat of vaporization absorbed by the refrigerant flowing through the evaporator).

  In the cooling device 3, the compressor 31, the condenser 4, and the wall surface condenser 32 are devices that release heat to the outside, and the evaporator 35 is a device that cools the internal space. Further, the compressor 31 requires a device for supplying power. Therefore, as shown in FIG. 1, the compressor 31 and the condenser 4 are disposed inside the machine room 14. Moreover, since the evaporator 35 is an apparatus which cools the internal space of the refrigerator Rf, it is arrange | positioned at the back of middle stage space R2.

  Note that a blower (not shown) is disposed in the refrigerator Rf in the vicinity of the evaporator 35 and blows air to the evaporator 35. The air blown to the evaporator 35 exchanges heat with the refrigerant inside the evaporator 35 and becomes low-temperature air (cold air). Then, the cold air circulates in the middle space R2, so that the middle space R2 is cooled, that is, the article stored in the middle space R2 is frozen.

  Further, the middle space R2 and the upper space R1 are connected via a duct (not shown), and the cool air slightly warmed by heat exchange when circulating in the middle space R2 is passed through the duct to the upper space R1. Flows in. Thereby, the article stored in the upper space R1 is cooled (refrigerated) to a temperature higher than the middle space R2 but lower than the outside air. Similarly, a duct communicating with the middle space R2 is formed between the lower space R3 and the lower space R3. Cold air flows into the lower space R3 through the duct, and the internal articles are cooled. With the above method, the cooling device 3 cools the air and the articles in the internal space of the refrigerator Rf.

(First embodiment)
Details of the machine room 14 and the condenser 4 of the refrigerator according to the present invention will be described below with reference to the drawings. FIG. 5 is a diagram showing a condenser used in the refrigerator according to the present invention.

  The machine room 14 is formed at the lower back of the housing 1. The machine room 14 is surrounded by a cover portion made of the same material (partially integrated) as the outer box 11. As shown in FIG. 3 and FIG. 4, the compressor room 31, the condenser 4 into which the refrigerant discharged from the compressor 31 flows, and the defrosting that occurs when the evaporator 35 is defrosted as shown in FIGS. 3 and 4. A drain pan 15 for storing water and a fan 5 which is a blower are arranged.

  The compressor 31 generates heat when driven. Moreover, the refrigerant | coolant compressed with the compressor 31 is also high temperature, and when it flows through the piping which connects the compressor 31 and the condenser 4, it thermally radiates outside. And the air inside the machine room 14 is warmed by such heat radiation. If the temperature of the air inside the machine room 14 rises, the temperature of the air blown to the condenser 4 will rise, and heat exchange efficiency will worsen.

  Therefore, the side wall of the machine room 14 is provided with an intake port 141 for taking in external cold air and an exhaust port 142 for discharging warmed air accumulated inside to the outside. As shown in FIG. 4, in the machine room 14, the intake port 141 is formed on the left side wall of the machine room 14 (right side because FIG. 4 is a rear view), and the discharge port 142 is opposite to the intake port 141. It is formed on the side, that is, the right side wall (left side in FIG. 4) of the machine room 14.

  As shown in FIGS. 3 and 4, the discharge port 142 is a rectangular (for example, square) through hole that penetrates the side wall of the machine room 14. A grill 140 is attached to the discharge port 142 to prevent foreign matter from entering through the through hole. The intake port 141 is also a through hole formed in the opposite surface, and a similar grill 140 (not shown) is attached. In FIG. 3, the grill 140 is a plate-like member having a plurality of small holes, but the grill 140 is not limited to this, and a wide variety of structures such as a mesh-like member that suppress the entry of foreign substances are used. It is possible to adopt.

  In the vicinity of the intake port 141 inside the machine room 14, a fan 5 that generates an air flow and promotes the inflow of air from the intake port 141 is attached. As shown in FIGS. 3 and 4, the condenser 4, the drain pan 15, and the compressor 31 are arranged in this order on the air discharge side of the fan 5.

  When the fan 5 is driven, air is forcibly taken in from the intake port 141. Since the grill 140 is attached to the intake port 141, large foreign matters are collected by the grill 140, but fine foreign matters such as dust and dust flow into the machine chamber 14 together with the air taken in. The air taken in from the intake port 141 is blown to the condenser 4 as a flow of air by the fan 5.

  Next, the condenser 4 will be described. As shown in FIG. 5, the condenser 4 includes a plurality of rectangular plate-like fins 41. And the condenser 4 is arranged side by side with a plurality of fins 41 with a gap in the vertical direction. And it has the refrigerant | coolant piping 42 folded back in the lower part of the fin 41 arrange | positioned at the upper part of the fin 41 arrange | positioned at the upper end and the lower end of the fin 41 which penetrates each fin 41 and is hold | maintained.

  In the condenser 4, when a high-temperature refrigerant flows through the refrigerant pipe 42, the heat of the refrigerant is transmitted to the refrigerant pipe 42, and the heat transmitted to the refrigerant pipe 42 is further transmitted to the fins 41. The heat transferred to the fin 41 is released from the surface of the fin 41 to the outside. In the condenser 4, since the fins 41 are provided, the heat radiation surface can be widened and the heat exchange efficiency is high as compared with the refrigerant pipe 42 alone.

  When the air from the fan 5 is blown onto the condenser 4, it passes through the gap between the fin 41 and the fin 41. At this time, the air passing through the gaps between the fins 41 removes heat from the surface of the fins 41. Further, when air flows through the gaps between the fins 41, foreign matters such as dust and dirt contained in the air adhere to the surface of the fins 41. When the adhesion of the foreign matter increases, the gap between the fins 41 is filled (clogged), the air flow to the fins 41 is deteriorated, and the heat exchange efficiency of the refrigerant in the condenser 4 is lowered.

  The clogging of the gap of the fin 41 is more likely to occur as the gap of the fin 41 is narrower. On the other hand, the heat exchange efficiency of the refrigerant in the condenser 4 becomes higher as the gap between the fins 41 is narrower, that is, the density of the fins 41 is higher. Inside the refrigerant pipe 42 of the condenser 4, the high-temperature refrigerant moves upward and the refrigerant cooled by heat exchange moves downward. Therefore, it is better that the heat exchange efficiency is higher in the upper part of the condenser 4. And in the lower part, the heat exchange efficiency may not be as high as the upper part.

  As shown in FIG. 5, the condenser 4 is divided into an upper region UL and a lower region DL, and the fins 41 in the upper region UL are arranged side by side at a pitch P1. Further, the fins 41 in the lower region DL of the condenser 4 are arranged side by side at a pitch P2 wider than the pitch P1.

  Thus, in the region UL at the top of the condenser 4, the heat exchange efficiency is high because the pitch P1 of the fins 41 is narrow. Conversely, in the region DL below the condenser 4, the pitch P <b> 2 of the fins 41 is wide, so that the air flow rate is large, and foreign matters such as dust and dust are less likely to adhere to the fins 41 (clogging is less likely to occur). Moreover, since the condenser 4 has a large flow rate of air passing through the lower region DL, the amount of air blown to the drain pan 15 increases, and evaporation of defrost water is promoted.

  From the above, the condenser 4 increases the heat exchange efficiency in the upper region UL where high-temperature refrigerant tends to accumulate, and in the lower region DL, the heat exchange efficiency is lower than that in the upper region UL. Clogging due to foreign matter is less likely to occur. By using such a condenser 4, it is possible to increase the heat release amount of the refrigerant and to suppress the reduction of the heat release amount of the refrigerant due to clogging over a long period of time.

  Moreover, since the load of the fan 5 does not need to be increased in order to increase the heat radiation amount of the refrigerant due to the pressure loss due to the clogging of the condenser 4, the deterioration of the fan 5 can be suppressed. From this, it is possible to suppress a decrease in the amount of air taken into the machine chamber 14 from the intake port 141 due to the deterioration of the fan 5, and to suppress a decrease in the heat release amount of the refrigerant in the condenser 4. Can do.

  From the above, by using the condenser 4, it is possible to suppress a decrease in the cooling capacity of the cooling device 3 over a long period of time.

  In the present embodiment, the condenser 4 is divided into two regions, an upper region UL and a lower region DL, and the pitch of the fins 41 in each region is set. However, the present invention is not limited to this. It is not a thing. For example, it may be divided into three or more regions, and the pitch of the fins 41 may be set for each region, or may be formed so that the pitch gradually increases from the upper part toward the lower part.

  In the present embodiment, the condenser 4 is disposed on the discharge side of the fan 5. However, the present invention is not limited to this, and the condenser 4 may be disposed on the suction side of the fan 5. However, since the density of air is high on the discharge side of the fan 5, even if foreign matter such as dust or dirt adheres to the fins 41, it is easily blown away by the air flow and is not easily clogged. 5 is preferably arranged on the discharge side. At this time, by allowing the air from the fan 5 to be blown over the entire surface of the condenser 4, it is possible to prevent foreign matters such as dust and dust from being blown off and attached to the portion where the air is not blown. It is.

  Furthermore, in this embodiment, the rectangular plate-shaped thing is used as the fin 41, However, It is not limited to this, For example, an elliptical and other polygonal plate-like thing may be sufficient.

(Second Embodiment)
Another example of the refrigerator according to the present invention will be described with reference to the drawings. FIG. 6 is a front view of a condenser used in another example of the refrigerator according to the present invention. The condenser 6 shown in FIG. 6 has a rectangular first fin 61 and a rectangular second fin 62 whose length in the longitudinal direction is shorter than the length of the first fin 61 in the longitudinal direction. The first fins 61 and the second fins 62 are alternately arranged with a gap in the horizontal direction in an upright state. And the 1st fin 61 and the 2nd fin 62 are arrange | positioned so that an upper end part may correspond. As shown in FIG. 6, in the condenser 6, the 1st fin 61 is arrange | positioned at both ends. In the condenser 6 shown in FIG. 6, the second fin 62 is half the length of the first fin 61.

  The condenser 6 includes a refrigerant pipe 63 that passes through the first fin 61 and the second fin 62 and holds the first fin 61 and the second fin 62. And the refrigerant | coolant piping 63 is return | folded in the outer side of the outermost 1st fin 61 among the 1st fin 61 and the 2nd fin 62 which were located in a line with the horizontal direction. The refrigerant pipe 63 penetrates only the first fin 61 in the lower region DL of the condenser 6 and penetrates both the first fin 61 and the second fin 62 in the upper region UL. Thereby, the first fin 61 and the second fin 62 are held by the refrigerant pipe 63.

  By providing the first fins 61 and the second fins 62 as described above, the fin pitch of the upper region UL is narrowed and the lower region DL is narrowed in the condenser 6 arranged in the horizontal direction with the fins standing upright. The fin pitch can be increased.

  From the above, the condenser 6 has a narrower fin interval in the upper region UL and a larger fin interval in the lower region DL, thereby improving the heat exchange efficiency in the upper part where the high-temperature refrigerant is accumulated. In the lower region DL, the heat exchange efficiency is lower than that in the upper region UL, but clogging due to foreign matters such as dust is less likely to occur. By using such a condenser 6, it is possible to increase the heat dissipation amount of the refrigerant and to suppress a decrease in the heat dissipation amount due to clogging.

  Further, the deterioration of the fan 5 is suppressed by the pressure loss due to the clogging of the condenser 6. For this reason, due to the deterioration of the fan 5, the amount of air taken into the machine room 14 from the intake port 141 is unlikely to decrease, and a reduction in the heat radiation amount of the refrigerant in the condenser 6 is suppressed.

  From the above, by using the condenser 6, it is possible to suppress a decrease in the cooling capacity of the cooling device 3 over a long period of time.

  In addition, since the part where the fin gap is wide and the part where the fin gap is narrow communicate with each other, the movement of the air flowing in the part where the fin gap is wide also acts on the narrow part. It is possible to suppress adhesion of dust and the like. Furthermore, since the fins are arranged to stand up, foreign matters such as dust may fall by weight, and the clogging of the fins hardly occurs from this point.

  In the condenser 6, the long first fins 61 and the short second fins 62 are alternately arranged. However, the present invention is not limited to this, and there is a portion where the second fins 62 are adjacent to each other. Also good. The arrangement of the second fins 62 is not limited as long as the first fins 61 are arranged so as not to be adjacent to each other in order to prevent the gap between the fins in the lower region from becoming narrow. Further, in the condenser 6, the two fins having the first fin 61 and the second fin 62 are used. However, three or more different length fins may be used.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. The embodiments of the present invention can be variously modified without departing from the spirit of the invention.

  The refrigerator of the present invention can reduce power consumption and suppress a decrease in cooling capacity.

Rf Cooler 1 Housing 11 Outer box 12 Inner box 13 Heat insulator 14 Machine room 141 Intake port 142 Outlet 15 Drain pan 16 Lid 2 Door 3 Cooling device 31 Compressor 32 Wall condenser 32R Right side condenser 32L Left side Condenser 32B Rear condenser 33 Dryer 34 Capillary tube 35 Evaporator 4 Condenser 41 Fin 42 Refrigerant piping 5 Fan 6 Condenser 61 First fin 62 Second fin 63 Refrigerant piping

Claims (4)

Inside the housing is a refrigerator having a machine room insulated against the internal space for storing articles at low temperature,
Inside the machine room,
A condenser which is a fin-type heat exchanger in which a plurality of fins are arranged;
A blower is arranged,
The plurality of fins are arranged so that the gap between the fins in the upper region is narrower than the lower region ,
Both the upper region fin and the lower region fin are arranged to face the discharge side of the blower,
The cooler , wherein air discharged from the blower directly flows into both the gap between the fins in the upper region and the gap between the fins in the lower region . The condenser is divided into a plurality of regions above and below,
The refrigerator according to claim 1, wherein the fins are arranged so that a gap is different for each region. The condenser has a structure in which a plurality of types of fins having different lengths are arranged in a horizontal direction in a standing state,
The refrigerator according to claim 1 , wherein the plurality of fins are aligned so that upper portions thereof are aligned and the longest fins are not continuous . A drain pan for storing defrosted water generated at the time of defrosting of an evaporator for cooling the internal space is provided on the downstream side after the air discharged from the blower has passed through the fins in the lower region. The refrigerator in any one of Claims 1-3.

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