JP4967510B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator that can reduce ambient noise.

  This type of conventional refrigerator has a condenser in the space formed by the top plate and the upper wall of the heat insulating wall for the purpose of increasing the volume in the cabinet that can be used effectively without increasing the external dimensions. A method has been adopted in which the compressor is disposed in a space formed by the top plate, the rear upper outer surface of the heat insulating wall, and the back plate in communication with the space (for example, see Patent Document 1).

  4 and 5 show the configuration of a conventional refrigerator described in Patent Document 1. FIG.

  As shown in FIG. 4, the refrigerator main body 1 has a top plate 2 having functions such as a cooking table and a work table, and a condenser 5 is provided in a space formed by the top plate 2 and the upper wall 4 of the heat insulating wall 3. Is arranged. A compressor 8 is disposed in a space communicating with this space and formed by the top plate 2, the rear upper outer surface 6 of the heat insulating wall 3, and the back plate 7 (hereinafter, the two spaces are combined to form a machine room). 9).

  An air inlet 11 for cooling the condenser 5 and the compressor 8 is provided at the front end of the machine room 9, that is, above the door 10, and the compressor 8 in the machine room 9 is provided as shown in FIG. An exhaust port 12 for discharging this air into the atmosphere is provided above. The air heated by the condenser 5 and the compressor 8 in the machine room 9 is lightened, and an airflow flowing from the intake port 11 to the exhaust port 12 is generated, and the condenser 5 and the compressor 8 are naturally cooled by this airflow. It is also possible to perform forced cooling by attaching a cooling fan at an appropriate position in the machine room 9.

  Further, in order to obtain the rising airflow, it is desirable that the exhaust port 12 be formed by appropriately projecting the machine chamber 9 from the upper portion of the compressor 8 and providing an opening on the upper surface of the projecting portion.

Since the machine room was placed in a part that was not used effectively in a conventional refrigerator, the part of the conventional machine room can be used as a refrigeration and freezing space, so it is effective without increasing the external dimensions. The volume in the warehouse that can be used in an effective manner can be increased.
Japanese Utility Model Publication No. 60-156378

  However, in the configuration described in Patent Document 1 above, since heat exchange with the condenser and cooling of the compressor are performed by a single fan, high-temperature air after heat exchange with the condenser is performed. Thus, the compressor was cooled, and a large air volume and a large opening area were required for sufficient cooling. Therefore, noise around the refrigerator due to the propagation of the compressor sound accompanying the increase in fan noise and the increase in the opening area to the outside of the refrigerator has been a problem.

  This invention solves the said conventional subject, and it aims at reducing the noise around a refrigerator.

  In order to solve the conventional problems, the present invention provides a heat insulating box, a refrigeration cycle including at least a compressor and a condenser provided in the heat insulating box, and a compression provided in the vicinity of the compressor. A compressor cooling fan, a cooling air air passage for the compressor, a condenser, a condenser cooling fan provided near the condenser, and a condenser cooling air air passage, the compressor cooling air air passage and the condenser The cooling air flow paths are independent of each other.

  As a result, firstly, low-temperature air outside the refrigerator can be used for cooling the compressor. As a result, the air volume of the cooling air can be reduced, the opening area of the suction and discharge openings can be reduced, the fan noise can be reduced by reducing the fan air volume, and the compressor and fan noise can be reduced by reducing the opening area. Since propagation to the refrigerator periphery can be reduced, noise around the refrigerator can be reduced.

  The refrigerator of the present invention can provide a refrigerator that achieves low noise.

The present invention relates to a heat insulating box, a refrigeration cycle including at least a compressor and a condenser provided in the heat insulating box, a compressor cooling fan provided in the vicinity of the compressor, A compressor cooling air air passage, a condenser, a condenser cooling fan provided near the condenser, and a condenser cooling air air passage, the compressor cooling air air passage and the condenser cooling air air passage are They are independent of each other.

  This makes it possible to cool the compressor with low-temperature air outside the chamber, unlike the conventional case, and the air volume of the compressor cooling air can be reduced. It is possible to reduce the propagation of compressor sound to the refrigerator by reducing the sound and the intake area of the cooling air and the area of the opening for discharge, and the noise around the refrigerator can be reduced.

In addition, the present invention provides more suction and discharge openings in the air passage for cooling the compressor on the back side of the heat insulating box so that the forward propagation of sound from the sound source such as the compressor and fan is reduced. It is possible to reduce noise around the refrigerator, particularly in front.

In the present invention, a compressor and a compressor cooling fan are disposed in a recess provided in the upper part of the heat insulating box, and a condenser and a condenser cooling fan are disposed in the lower part of the heat insulating box. In addition, the presence of the compressor at the top makes it difficult for heat to accumulate around the compressor, and the cooling efficiency of the compressor is further improved, so that it is possible to further reduce the fan noise and reduce the ambient noise accompanying the reduction of the suction and discharge opening area It becomes. Furthermore, by disposing the condenser in the lower part, heat exchange with the lower temperature air at the lower part becomes possible, so that the condensation capacity can be increased.

(Embodiment 1)
1 is a schematic cross-sectional view of a refrigerator according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view of the refrigerator according to Embodiment 1 as viewed from the back.

  In FIG. 1, a heat insulating box body 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, a refrigeration room 104 having a relatively high temperature is arranged at the top, a freezing room 106 having a low temperature is arranged at the bottom, and a vegetable room 105 is arranged between the refrigeration room 104 and the freezing room 106.

  The refrigerator compartment 104 is closed by a rotary refrigerator compartment door 107, and a gasket is interposed between the flange surface of the heat insulating box 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 as described above. In some cases, a slightly higher temperature, for example, around 10 ° C., may be used for the preservation of wine and root vegetables.

  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 opened and 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 106 and the vegetable compartment 105 are provided with gaskets between the flange surfaces and the doors to enhance the sealing performance.

  The refrigeration cycle includes a compressor 111, a condenser 114, a capillary (not shown), and an evaporator 116.

  The compressor 111 is elastically supported inside a machine room 113 provided at the lower back of the heat insulating box. Note that the compressor 111 may be of a variable capacity type that can control the refrigerant circulation amount by, for example, controlling the rotation speed by an inverter and change the refrigeration capacity.

  The compressor cooling fan 112 is disposed on a side surface of the compressor 111 and uses, for example, an axial fan. Note that the compressor cooling fan 112 may have a specification that changes the rotational speed in accordance with the ambient temperature or the rotational speed of the compressor.

  The compressor 111 and the compressor cooling fan 112 are covered with a cover 117 from the back to form a cooling air passage. Note that a space in which the compressor 111 and the fan 112 configured by the cover and the heat insulating box are disposed is referred to as a machine room 113.

  The cover 117 is formed of a metal material for promoting heat radiation from the machine chamber 113, and a ventilation opening for intake and discharge of compressor cooling air is provided on the cover 117 on the rear surface.

  The condenser 114 is disposed on the top surface of the heat insulating box 101, a condenser cooling fan 115 is disposed in front of or behind the condenser 114, and these are covered with a cover 118 from above, and the condenser cooling air passage is provided. Is configured.

  The condenser 114 is, for example, a spiral fin tube type, and is fixed in a state where it floats from the top surface of the heat insulation box body in the space between the top surface of the heat insulation box body and the cover.

  Similarly to the compressor cooling fan 112, the condenser fan 115 also uses, for example, an axial fan, and may be used to change the rotational speed in accordance with the heat dissipation capability of the condenser and the ambient temperature. Further, the condenser fan 115 may be directed obliquely to save space.

  The cover 118 is made of a resin such as ABS, and has a ventilation opening for suction and discharge on the side surface.

  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 is radiated and liquefied by the condenser 114, depressurized by a capillary (not shown), becomes a low-temperature and low-pressure refrigerant, reaches the evaporator 116, and the air inside the evaporator is inside the evaporator. 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 is sucked into the compressor 111. By performing the cycle operation in this way, the interior is cooled.

  Along with the compressor operation, the fan 112 also starts to cool the compressor that becomes high temperature. As a result, the outside air flows in from the suction ventilation opening provided in the back cover 117, and after cooling the compressor, the air is discharged from the discharge ventilation opening provided in the back cover 117 to the outside. leak.

  Similarly, the condenser cooling fan 115 is also started to operate in accordance with the compressor operation, whereby outside air flows from the ventilation opening provided in the condenser cover 118 and exchanges heat with the condenser. Then, the air flows out from the vent opening for discharge.

  At this time, since the compressor cooling air passage and the condenser cooling air passage are provided independently, low-temperature air outside the refrigerator can be used for cooling the compressor 111, The compressor can be cooled by the air volume. This makes it possible to reduce the number of rotations of the compressor cooling fan 112 and to reduce the area of the ventilation opening 119 provided in the back cover 117, to reduce fan noise by reducing the number of rotations, and to reduce the compressor 111 by reducing the opening area. Propagation of sound to the outside of the warehouse can be reduced, and noise reduction around the refrigerator can be achieved.

  Further, as shown in FIG. 2, by providing the suction and discharge ventilation openings only in the cover on the back of the machine room, sound propagation from the compressor 111 is only in the rear, so that the refrigerator surroundings, in particular, Sound in the front can be reduced.

  In addition, although the condenser 114 used the spiral fin tube, since the thickness of a condenser can be made almost equivalent to a pipe by using a wire condenser and a plate condenser, the increase in the internal volume accompanying the condenser thinning Can be measured.

  Although the condenser fan 115 uses an axial fan, for example, by using a cross flow fan, it is possible to further reduce the thickness and increase the internal volume.

(Embodiment 2)
FIG. 3 is a schematic cross-sectional view of the refrigerator in the second embodiment of the present invention.

  In FIG. 3, the compressor 202 is elastically supported in a recess provided in the upper part of the heat insulating box 201, and the compressor cooling fan 203 is arranged on the side surface of the compressor, and these are covered with the cover 205 from the upper part and the rear face. The cooling air passage is configured.

  The condenser 206 is disposed in the lower part of the heat insulating box 201, and a condenser cooling fan 207 is provided in front or rear of the condenser 206, and is covered with a cover 208 from below to constitute a cooling air air passage.

  By arranging the compressor 202 at the top of the heat insulating box 201, first, a space is created at the top of the compressor 202, and the cooling efficiency of the compressor 202 is increased because heat does not easily accumulate around the machine room 204. It is possible to further reduce the air volume, and it is possible to reduce the noise around the refrigerator by reducing the fan rotation speed and the area of the ventilation opening.

  In addition, the compressor 202 is disposed from the lower part of the heat-insulating box 201 at the lower rear side of the refrigerator compartment 209, which has been used less frequently and is substantially ineffective space. Can be increased, and the volume of the freezer compartment can be increased. In addition, the temperature difference between these devices and the inside of the cabinet (refrigeration room) is lower than when high-temperature equipment such as a compressor is installed at the bottom, reducing the amount of heat entering the cabinet and improving efficiency. It can lead to improvement. 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 211 having the largest temperature difference from the ambient temperature can be reduced, and power consumption can be reduced.

  As described above, the refrigerator according to the present invention can reduce noise around the refrigerator by making the air passages for cooling the compressor and the condenser independent of each other. It can also be applied to refrigeration equipment.

Schematic sectional view of the refrigerator in the first embodiment of the present invention. The perspective view seen from the back of the refrigerator in Embodiment 1 of this invention Schematic sectional view of the refrigerator in the second embodiment of the present invention. Schematic sectional view of a conventional refrigerator Main part perspective view of a conventional refrigerator

Explanation of symbols

101, 201 Heat insulation box 111, 202 Compressor 112, 203 Compressor cooling fan 114, 206 Condenser 115, 207 Condenser cooling fan 117, 205 Cover 118, 208 Cover

Claims (1)

A heat insulating box, a refrigeration cycle including at least a compressor and a condenser provided in the heat insulating box, a compressor cooling fan provided in the vicinity of the compressor, and a cooling air air passage for the compressor A condenser, a condenser cooling fan provided in the vicinity of the condenser, and a condenser cooling air air passage, wherein the compressor cooling air air passage and the condenser cooling air air passage are independent of each other, and the compression A compressor and a compressor cooling fan provided in a recess provided in the upper back of the heat insulating box, and a suction chamber opening and a discharge opening in the compressor cooling air duct are provided in a machine room for storing the compressor. A refrigerator characterized by being provided only on the back side of the covering cover .

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