JP4285402B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator that secures a stable heat radiating capacity regardless of changes in ambient conditions in a condenser provided at the top.

  Conventionally, this type of refrigerator is provided with a condenser on the top and covered with a cover from the top. At this time, there is an air vent that radiates heat from the condenser by providing an air intake hole for radiating heat from the condenser and exhausting it from the rear side of the cover. Thereby, even when the back surface of the refrigerator is installed exactly on the wall surface, it is possible to perform heat dissipation of the condenser satisfactorily (see, for example, Patent Document 1).

  FIG. 3 shows a configuration of a conventional refrigerator described in Patent Document 1. As shown in FIG.

In FIG. 3, the refrigerator has a configuration in which the compressor 4 is disposed on the lower back surface of the refrigerator, and the condenser 3 covers the refrigerant pipe that is circulated on the lower surface in the upper portion of the refrigerator main body with a metal flat heat radiation cover 7. The heat radiating cover 7 is provided with an air intake hole 7a on the front side, and a heat exhaust hole 7b is formed on the rear top surface so as to prevent air from being accumulated in the upper part of the refrigerator body. Facilitate. Further, the intake hole 7 a of the heat dissipation cover 7 is provided above the refrigerator compartment door 5.
JP 61-36678 A

  However, in the above conventional configuration, since the intake hole 7a of the condenser 3 is disposed at the upper part of the door of the refrigerator, there is a problem that the appearance of the refrigerator is not preferable. Moreover, since the condenser 3 and the heat radiating cover 7 protrude from the upper part of the refrigerator door, there is a problem that the substantial height of the refrigerator main body is increased. Further, since the heat radiation means of the condenser is only natural convection heat radiation through the upper heat radiation hole, there is a problem that the heat exchange amount with the air is small and the heat radiation capacity in the condenser is low.

  This invention solves the said conventional subject, and it aims at ensuring heat dissipation capability, without impairing the external appearance design of a refrigerator in the refrigerator which arrange | positions a condenser on a top | upper surface.

  In order to solve the above-described conventional problems, a refrigerator according to the present invention is provided with a heat insulating box having a front opening, and the heat insulating box that can be freely opened and closed, and has an upper end that is higher than the top surface of the heat insulating box. A door provided, a condenser provided on a top surface of the heat insulation box, a fan for forced air cooling of the condenser, and a cover covering at least the condenser, wherein the cover is the heat insulation box. A suction opening is provided on the front side of the door, and a notch is provided on the back side of the door opposite to the suction opening, and a suction air passage for forcibly air-cooling the condenser by the fan is provided from the notch. Passing through the condenser through the suction opening of the cover. This makes it possible to ensure the heat dissipation capability of the condenser without impairing the external design of the refrigerator.

  The refrigerator of this invention can ensure the stable heat dissipation capability in a condenser, without impairing the external appearance design of a refrigerator.

  The invention according to claim 1 is a heat insulating box having a front opening, a door that is provided in the heat insulating box so as to be openable and closable and whose upper end is disposed higher than the top surface of the heat insulating box, A condenser provided on a top surface of the heat insulation box; a fan for forced air cooling of the condenser; and a cover that covers at least the condenser; and the cover has a suction opening on a front surface side of the heat insulation box. And a notch is provided on the back side of the door facing the suction opening, and a suction air passage for forcibly air-cooling the condenser by the fan extends from the notch to the suction opening of the cover. By passing through the condenser, the heat dissipation capability of the condenser can be ensured without impairing the appearance design of the refrigerator. In addition, the flow direction of the wind is changed from the vertical direction to the front-rear direction immediately before inflow of the suction opening, and the flow is disturbed as compared with the case of flowing straight from the front to the suction opening. It becomes difficult for dust to adhere to the part. Furthermore, since the air in the upper part of the heat insulation box flows in, it is possible to prevent the user from feeling the flow of wind rather than the air flowing in from the front.

  Invention of Claim 2 is the state which closed the door of the refrigerator in the invention of Claim 1 because the condenser was arrange | positioned flatly so that it might be less than the height of the said door. Then, since the condenser cannot be seen from the front, the heat dissipation capability of the condenser can be secured without impairing the appearance design. Further, dust near the suction opening can be removed when air pushed by the door when the door is closed collides with the front surface of the cover.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a detachable filter is provided in the suction opening portion on the front surface of the cover, whereby dust from the suction opening portion into the cover is provided. It is possible to ensure the heat dissipation capability by preventing the inflow of the gas. Further, the filter can be removed and cleaned, and dust can be easily removed.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a display device that indicates the state of dust adhesion near the suction opening is disposed above the door. The display device can also be cooled by the air flowing into the cover, and overheating can be prevented. In addition, for example, by installing a sign or the like that informs the adhesion of dust on the upper part of the door, the sign can be displayed near the cleaning position, and the user can easily check the place to be cleaned.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to third aspects, a machine room for storing a compressor is provided on an upper portion of the heat insulating box, and the fan is provided in the machine room. At the same time, by cooling the condenser and the compressor together with the fan, the fan can be installed in the machine room, so a large fan with a large air volume can be provided, and heat dissipation of the condenser is further promoted. can do. In addition, heat exchange in the condenser and cooling of the compressor can be performed simultaneously by ventilation with a single fan, and efficiency can be improved by lowering the compressor temperature. Furthermore, since the number of fans can be reduced, the cost can be reduced.

(Embodiment 1)
FIG. 1 shows a schematic cross-sectional view of a refrigerator in Embodiment 1 of the present invention.

  In FIG. 1, a heat insulating box 101 is provided with a heat insulating wall by injecting a foam heat insulating body into a space formed by an inner box 102 and an outer box 103. The inner box 102 is vacuum-formed with a resin material such as ABS, and the outer box 103 is made of a steel plate. For example, hard urethane foam or styrene foam is used for the heat insulating wall. In addition, a high-performance heat insulating material such as a vacuum heat insulating material may be embedded in the heat insulating wall to reduce the amount of heat entering from the outside.

  In the heat insulating box, the refrigerator compartment 104 having a relatively high temperature is arranged at the top, the freezer compartment 106 having a low temperature is arranged at the bottom, and the vegetable compartment 105 is arranged between the refrigerator compartment and the freezer compartment.

  The refrigerator compartment 104 is closed by a rotary refrigerator compartment door 107, and a gasket is interposed between the flange surface 110 and the refrigerator compartment door 107 to enhance the sealing performance. The refrigerator compartment door 107 is provided with a plurality of pockets for storage, and the inside of the refrigerator compartment 104 is divided into a plurality of stages. The refrigerator compartment 104 is usually set at 1 to 5 ° C. for refrigerated storage, but may be set at a slightly lower temperature, for example, −3 to 0 ° C. for improving the freshness, and is used depending on the stored items. In some cases, a person can freely switch the temperature setting as described above. In addition, in order to preserve wine, root vegetables, etc., the temperature may be set slightly higher, for example, around 10 ° C.

  The freezer compartment 106 is closed by a drawer door that is drawn forward together with a support container that can be drawn in the front-rear direction with respect to the left and right rails provided in the freezer compartment. Moreover, although the freezer compartment 106 is normally set at -22--18 degreeC in order to preserve | save food frozen, it may be set at lower temperature, for example, -30--25 degreeC, for a freshness improvement. is there.

  Similar to the freezer compartment 106, the vegetable compartment 105 is also closed by a drawer door that is drawn forward together with a support container that can be pulled out in the front-rear direction with respect to the left and right rails provided in the vegetable compartment 105.

  Similarly to the refrigerator compartment 104, the freezer compartment 104 and the vegetable compartment 105 are provided with gaskets between the flange surfaces and the doors to enhance the sealing performance.

  The refrigeration cycle is configured by connecting a compressor 111, a condenser 112, an evaporator 116, and a capillary for pressure reduction (not shown) in an annular shape.

  The compressor 111 is elastically supported and fixed for vibration isolation in a machine room provided at the lower part of the heat insulating box. Further, the compressor 111 may be of a variable capacity type that can control the refrigerant circulation amount by changing the number of revolutions by an inverter and change the refrigeration capacity.

  The condenser 110 is disposed on the top surface of the heat insulating box 101, the fan 113 is disposed in front of or behind the condenser 112, and these are covered with a cover 114 from above to constitute an air path.

  The condenser 112 is, for example, a spiral fin tube type, and is fixed in a state of floating from the top surface of the heat insulation box body in a space between the top surface of the heat insulation box body and the top surface of the cover.

  For example, an axial fan is used as the fan, and is arranged in front of or behind the condenser 112. Further, the fan 113 may be fixed obliquely for space saving. Further, the fan 113 may change its rotational speed in accordance with the rotational speed of the compressor 111 or the heat dissipation capability of the condenser 112.

  The cover 114 is made of resin and is fixed to the flange surface 120 of the heat insulating box at a position where the front surface of the cover can be seen from the front. In addition, the cover 114 is provided with a suction opening 117 on the front side surface thereof, and an exhaust opening is provided on the rear side.

  The refrigerator door 107 is provided with a guider 118 which is a notch on the back side of the upper part thereof, and the depth distance H1 in the front-rear direction behind the guider 118 is wider than the suction opening height H2, so that the suction air volume is reduced. Can be secured. In addition, an electronic device 120 such as a display device is installed in the upper part of the door, and for example, a sensor for detecting and notifying dust may be provided.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the operation of the refrigeration cycle will be described. The refrigerant discharged by the operation of the compressor 111 dissipates heat in the condenser 112 and is liquefied, and is decompressed by a capillary (not shown) to become a low-temperature and low-pressure refrigerant to reach the evaporator 116. And the refrigerant evaporates. Heat exchange is performed, and the cooled air is distributed to each chamber through a duct (not shown) to cool the inside of the cabinet. The refrigerant exiting the evaporator 116 is sucked into the compressor 111. By performing the cycle operation in this way, the interior is cooled.

  Next, heat exchange in the condenser 112 during compressor operation will be described. With the operation of the compressor 111, the fan 113 on the top surface also starts to operate. As a result, the outside air passes through the front opening of the cover 114 covering the upper part of the refrigerator, exchanges heat with the condenser 112, and flows out to the outside.

  At this time, since no opening is provided on the top surface of the cover 114, dust does not adhere to the condenser 112 from the upper portion, and it is possible to prevent a decrease in heat radiation capacity due to dust accumulation on the condenser 112. It is also possible to prevent a decrease in heat radiation capability due to the heat radiation hole being blocked by placing a load on the top surface.

  In addition, since the front surface of the cover 114 is in a visible position, when dust adheres to the suction opening 117, the user immediately notices it, and because it is easily accessible, it is easy to clean and remove dust. Therefore, it is easy to prevent clogging at the suction opening 117, and it is possible to prevent a decrease in heat dissipation capability.

  Further, by providing the guider 118 at the upper part of the refrigerator compartment door 107, the air in the upper part of the heat insulating box 101 flows into the suction opening 117 in a shape that is bent at a right angle along the guider 118, and flows into the suction opening 117. Since the wind direction changes immediately before, the flow is disturbed, and the dust is less likely to adhere to the suction opening 117. Moreover, since the air ahead of the heat insulation box 101 is not inhaled, a user can be made not to feel the flow of a wind. Further, the air pushed by the guider 118 when the refrigerator compartment door 107 is closed can collide with the suction opening 117 to remove dust.

  Furthermore, by attaching a detachable filter 119 to the suction opening 117, the filter 119 can be removed to remove dust, making cleaning easier and easier to remove dust, ensuring stable heat dissipation capability. It becomes possible to do.

  Furthermore, by disposing the electronic device 120 such as a display device on the upper part of the refrigerator compartment door 107, the electronic device 120 can be cooled by the air flowing into the cover, and the electronic device 120 can be prevented from being overheated. In addition, for example, if a sign for detecting the adhesion of dust near the suction opening and notifying it is arranged as a display device at the upper part of the refrigerator door 107, the display device is arranged in the vicinity of the place to be cleaned, which requires cleaning. The location becomes easier for the user to understand.

  In addition, although the condenser 112 used the spiral fin tube type, the thickness of the condenser 112 can be made almost the same as the pipe diameter by using a wire condenser or a plate type, and further thinning is possible. Thus, the internal volume can be increased.

  In addition, although the fan 113 used the axial flow fan, height can be restrained by using a cross flow fan, for example, and expansion of the internal volume by thickness reduction can be aimed at.

(Embodiment 2)
FIG. 2 is a schematic view of the upper part of the refrigerator in the second embodiment of the present invention. In FIG. 2, the heat insulating box 201 is provided with a recess at the back of the top surface portion, and the first top surface 203 forming the heat insulating box body and the second ceiling disposed at a position lower than the first top surface 203. The condenser 207 is elastically supported on the first top surface 203 and the compressor 205 is elastically supported on the second top surface 204 for vibration isolation. Further, the fan 206 is disposed on the side of the compressor 205 so that the flow of air flows from the condenser 207 to the compressor 205 in order to prevent the heat generated from the compressor 205 from propagating to the condenser 207. ing. The cover 208 is disposed so as to cover the condenser 207, the compressor 205, and the fan 206 from above, and has a suction opening on the front surface and an exhaust opening 209 on the rear of the cover. Further, the cover can be used by dividing it into a back surface and a top surface, or a first top surface portion and a second top surface, which may improve workability.

  By providing a recess in the upper part of the heat insulating box 201, the distance from the top surface of the cover 208 to the second top surface 204 becomes longer, and a larger fan can be mounted. For example, when dust adheres to the suction opening However, a large air volume can be secured, and a decrease in heat dissipation capability can be prevented.

  Further, by disposing the compressor 205 on the upper side of the heat insulating box 201, heat exchange in the condenser 207 and cooling of the compressor 205 can be performed simultaneously by ventilation with a single fan. The efficiency improvement by can be aimed at. Furthermore, since the number of fans can be reduced, the cost can be reduced. In addition, if there is a sound source such as a compressor or a fan at the bottom, the sound is reflected between the bottom of the heat insulation box and the floor and echoes forward, but when installed at the top, the sound is distributed to the upper rear of the heat insulation box. In addition, it is possible to reduce the noise around the refrigerator, particularly in the front. In addition, by placing the high-pressure equipment behind the top of the refrigeration room where it is difficult to reach and the frequency of use is the lowest, and it has become a substantially invalid space, the depth of the lowest freezing room that is frequently used can be increased. The freezer compartment volume can be increased. In addition, the temperature difference between these devices and the inside of the cabinet is lower than when high temperature equipment such as compressors and condensers are installed at the bottom, reducing the amount of heat entering the cabinet and improving efficiency. Can be connected. In addition, by eliminating the machine room where the compressor and fan are placed from the bottom, the structure around the freezer compartment becomes simple, and the heat insulation wall can be placed up to the lower part of the freezer room. Can be increased, the amount of heat entering the freezer compartment having the largest temperature difference from the ambient temperature can be reduced, and power consumption can be reduced.

  As described above, in the refrigerator according to the present invention, when the condenser is installed on the upper part, it is possible to ensure the heat radiation capacity regardless of changes in ambient conditions such as dust accumulation, so that it is not only a household refrigerator but also a commercial one. It can be applied to a device such as a refrigerator where a condenser is installed at the top.

Schematic sectional view of the refrigerator in the first embodiment of the present invention. Schematic of the refrigerator upper part in Embodiment 2 of the present invention Schematic sectional view of a conventional refrigerator

Explanation of symbols

101, 201 Heat insulation box 107 Refrigeration room door (door)
110 Flange surface 111, 205 Compressor 112, 207 Condenser 113, 206 Fan 114, 208 Cover 117 Suction opening 118 Guider (notch)
119 Filter 120 Electronic equipment

Claims (5)

  A heat insulating box having a front opening, a door that is provided in the heat insulating box so as to be openable and closable, and has an upper end disposed higher than a top surface of the heat insulating box, and a top surface of the heat insulating box. A condenser forcibly cooling the condenser, and a cover that covers at least the condenser. The cover includes a suction opening on the front side of the heat insulating box, and the suction opening. A notch is provided on the back side of the facing door, and a suction air passage for forcibly air-cooling the condenser by the fan passes through the condenser from the notch through the suction opening of the cover. Is a refrigerator.   The refrigerator according to claim 1, wherein the condenser is arranged on a flat surface so as to fit within a height of the door.   The refrigerator according to claim 1 or 2, wherein a detachable filter is provided in the suction opening on the front surface of the cover.   The refrigerator as described in any one of Claim 1 to 3 which has arrange | positioned the display apparatus which shows the adhesion state of the dust of the said suction opening vicinity to the upper part of the said door.   4. The machine room according to claim 1, wherein a machine room for storing a compressor is provided in an upper part of the heat insulation box, the fan is provided in the machine room, and the condenser and the compressor are cooled together by the fan. The refrigerator according to one item.

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