JP6490221B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with a cooler that cools the air inside the room (indoor). In particular, it relates to measures against dew in the freezer.

  Conventionally, in a refrigerator, for example, a refrigerant circuit is configured using a refrigeration cycle, and air in the refrigerator is circulated to cool an object to be cooled such as food. The refrigerant circuit includes a cooler that cools the air in each room of the refrigerator by using, for example, evaporation of the refrigerant. Here, the cooler is, for example, a heat exchanger having a plurality of heat transfer tubes through which a refrigerant passes and a plurality of plate-like fins for expanding the heat transfer area.

  Conventionally, in a refrigerator, a cooler that is a heat exchanger is partitioned by a wall of a freezer compartment and a refrigerator compartment, and is installed on the back side (back side). Then, a fan provided in the air path is driven to circulate air between each room and the cooler. For air circulation, cool air from the cooler flows into each room. In addition, the air whose temperature has increased due to the heat load in each room is caused to flow out and returned to the cooler again.

  The freezer return opening that opens to return air from the freezer side to the cooler is located in the front direction with respect to the cooler, and is arranged so that the lower edge of the opening is above the lower end of the cooler. ing. Moreover, the refrigerator compartment return port opened in order to return air from a refrigerator compartment to a cooler is arrange | positioned so that it may become below the lower edge of an opening part.

JP 2014-238182 A

  In the refrigerator as described above, since the freezer return port is arranged in the front direction with respect to the cooler, when the freezer door is opened, frost attached to the cooler surface can be visually observed, and the appearance is poor. . Further, when defrosting, the amount of heat transferred from the freezer return port to the freezer compartment increases, increasing the temperature in the freezer compartment, resulting in an increase in power consumption. At this time, even if dew that has melted frost adheres to the freezer return port, there is an adverse effect such as poor appearance.

  This invention solves the above subjects, and it aims at obtaining the refrigerator which prescribes | regulates the positional relationship of a cooler and a freezer compartment return port, and takes the countermeasure against the dew produced by defrosting.

The refrigerator according to the present invention includes a freezer compartment that stores a freezing object, a cooler that cools the air in the freezer compartment, and an air flow that passes the air returning from the freezer compartment through the cooler and sends it to the outlet of the freezer compartment. The freezer compartment has a freezer compartment return port through which the air from the freezer compartment returns, and the cooler is disposed on the wall rear side of the refrigerator. The return port is arranged at a position where the lower edge of the wall formed by the opening portion and the wall on the back side is above the lower end of the cooler in the height direction, and is installed at the opening portion of the freezer return port. , the freezing chamber side have a upward and cooler side louver which is inclined downward, is arranged below the cooler, a drip tray having a drain hole, installed in the freezing chamber, a communication hole for drip tray and communicating, Water on the wall that cuts off the freezer and cooler Those comprising a rib for guiding the passing hole.

  According to the refrigerator of the present invention, the wind direction plate installed at the freezer return opening is generated at the time of defrosting by inclining so that the end on the cooler side faces downward from the end on the freezer compartment side. Drain water and other dew will not stay on the wind direction plate.

It is a figure which shows the external appearance of the refrigerator 100 which concerns on Embodiment 1 of this invention. It is a figure explaining the outline | summary in the refrigerator in the refrigerator 100 which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the refrigerant circuit in the refrigerator 100 which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the cooler room 10 which concerns on Embodiment 1 of this invention. It is a figure explaining the cooler 11 which concerns on Embodiment 1 of this invention. It is a figure which shows the arrangement | positioning relationship of the apparatus etc. in the cooler room 10 which concerns on Embodiment 1 of this invention. It is a figure explaining the function of the wind direction board 33 in the refrigerator 100 which concerns on Embodiment 1 of this invention. It is a figure (the 1) showing the freezer compartment return 41 part of the refrigerator 100 which concerns on Embodiment 2 of this invention. It is FIG. (2) showing the freezer compartment return 41 part of the refrigerator 100 which concerns on Embodiment 2 of this invention. It is a figure (the 1) showing the freezer compartment return 41 part of the refrigerator 100 which concerns on Embodiment 3 of this invention. It is a figure (the 2) showing the freezer compartment return 41 part of the refrigerator 100 which concerns on Embodiment 3 of this invention.

  Hereinafter, a vacuum heat insulating material according to an embodiment of the invention will be described with reference to the drawings. In the following drawings, the same reference numerals denote the same or corresponding parts, and are common to the whole text of the embodiments described below. And the form of the component represented by the whole specification is an illustration to the last, Comprising: It does not limit to the form described in the specification. In particular, the combination of the components is not limited to the combination in each embodiment, and the components described in the other embodiments can be applied to another embodiment. Further, in the following description, the upper side in the figure is described as “upper side” and the lower side is described as “lower side”. Furthermore, in order to facilitate understanding, terms representing directions (eg, “right”, “left”, “front”, “rear”, etc.) are used as appropriate. The terms do not limit the invention according to the present application. In addition, the vertical direction when the refrigerator is viewed from the front side is the height direction, and the horizontal direction is the width direction. In the drawings, the relationship between the sizes of the constituent members may be different from the actual one.

Embodiment 1 FIG.
<Overall configuration of refrigerator>
FIG. 1 is a view showing an appearance of a refrigerator 100 according to Embodiment 1 of the present invention. A refrigerator 100 shown in FIG. 1 has a room for storing stored items such as food and refrigerated or frozen. In the refrigerator 100 of the present embodiment, the first refrigerator compartment 1 is located at the top and the second refrigerator compartment 5 serving as a vegetable compartment is located at the bottom. A freezer compartment 4 is located above the second refrigerator compartment 5. And between the freezer compartment 4 and the 1st refrigerator compartment 1, the switching room 2 is located in the right side in FIG. 1, and the ice making room 3 is located in the left side. The 1st refrigerator compartment 1 and the 2nd refrigerator compartment 5 become a room which cools. Further, the ice making room 3 and the freezing room 4 are rooms for freezing. The switching room 2 is a room that can be switched between refrigeration and freezing. Each room has an opening on the front side, and covers each opening so that the door 6 can be opened and closed. Here, although the door 6 which opens and closes the 1st refrigerator compartment 1 is shown with the double door structure of double-opening type (Kannon type), it does not specifically limit. For example, a single door type single door configuration may be used. In the following description, the first refrigeration room 1, the switching room 2, the ice making room 3, the freezer room 4, and the second refrigeration room 5 will be described as storage rooms unless particularly distinguished. A representative room for refrigerated storage will be referred to as a first refrigerating room 1, and a representative room for freezing will be described as a freezing room 4.

<Outline of storage>
FIG. 2 is a diagram illustrating an outline of the interior of the refrigerator 100 according to Embodiment 1 of the present invention. In the refrigerator 100, spaces serving as storage rooms are formed. Each storage room is thermally insulated from the outside by the door 6 and the heat insulating wall. In addition, as shown in FIG. 2, the refrigerator 100 according to the present embodiment includes a cooler room 10 and a machine that are partitioned by a barrier wall 40 serving as a back wall of each storage room and each storage room and the barrier wall 40. A chamber 20 is provided.

  FIG. 3 is a diagram showing the configuration of the refrigerant circuit in the refrigerator 100 according to Embodiment 1 of the present invention. The machine room 20 is a room in which devices such as a compressor 21 constituting a refrigerant circuit are installed, for example. Refrigerator 100 of the present embodiment constitutes a refrigerant circuit that circulates refrigerant by connecting compressor 21, condenser 22, capillary tube 23, precooler 12 and cooler 11 with refrigerant piping, for example. For example, in this embodiment, isobutane (R600a) is used as the refrigerant.

  The compressor 21 compresses the gas-phase refrigerant sucked from the suction side to high pressure and high temperature, and sends it out from the discharge side. The condenser 22 condenses the high-temperature and high-pressure refrigerant from the compressor 21 by heat exchange with the air outside the refrigerator 100. Here, you may comprise the condenser 22 with a heat exchanger. Alternatively, a refrigerant pipe may be attached to the outer wall of the refrigerator 100 to condense the heat of the refrigerant passing through the refrigerant pipe by dissipating the heat to the outside of the refrigerator 100. The capillary tube 23 serving as a decompression device decompresses the liquid-phase refrigerant flowing from the condenser 22 to a low-temperature and low-pressure gas-liquid two-phase state.

<Outline of structure of cooler chamber 10>
FIG. 4 is a diagram showing the configuration of the cooler chamber 10 according to Embodiment 1 of the present invention. The cooler room 10 is a room in which, for example, equipment that circulates air between each storage room and sends the cooled air to each storage room to maintain the temperature in each storage room is installed. The cooler chamber 10 of the present embodiment includes a cooling fan 15, a cooler 11, a precooler 12, a click heater 30, a drip tray 31, and the like.

<Cooler 11>
FIG. 5 is a diagram for explaining the cooler 11 according to Embodiment 1 of the present invention. During the normal operation of the refrigerator 100, the cooler 11 cools the air in each storage chamber by exchanging heat with the refrigerant passing through the inside. The refrigerant evaporates and returns to the compressor 21 described above. Here, as shown in FIG. 5, the cooler 11 of the present embodiment is assumed to have a fin tube structure having, for example, a heat transfer tube 14 through which a refrigerant passes and fins 13 for increasing the heat transfer area. For example, the fins 13 have plate-like surfaces arranged in parallel at regular intervals (hereinafter referred to as fin pitch). Further, the heat transfer tube 14 passes through the fins 13 in the direction in which the fins 13 are arranged. The fin pitch is determined in consideration of clogging between the fins 13 due to frost formation (increased air path resistance) and the like. For example, a range of 5 mm to 10 mm is desirable. Here, for example, as the air travels downstream in the air flow direction, the amount of moisture in the air decreases due to heat exchange. For this reason, compared with the downstream side of the cooler 11, the upstream side tends to form frost. Therefore, the fin pitch of the fins 13 located on the downstream side may be 5 mm, the fin pitch of the fins 13 located on the upstream side may be 7.5 mm to 10 mm, and the upstream fin pitch may be set wider. Here, the fin pitch in the fin 13 of the cooler 11 is not particularly limited. For example, the upstream and downstream fin pitches may be uniformly 5 mm. Further, the shape of the fin 13 is not particularly limited. Examples of the fin shape include a plate fin, a corrugated fin, a louver fin, and a slit fin. In addition, in the cooler 11 of FIG. 5, a click heater 30 is installed as will be described later.

<Pre-cooler 12>
Similarly to the cooler 11, the precooler 12 also has fins 13 and heat transfer tubes 14 arranged at a constant interval. The pre-cooler 12 is disposed upstream of the cooler 11 in the air flow direction. For this reason, frost formation increases more than the cooler 11. Accordingly, for example, the fin pitch of the pre-cooler 12 is desirably configured in a range of 10 mm to 15 mm, which is larger than the fin pitch (5 mm to 10 mm) of the cooler 11 described above. Here, the fin pitch in the fin 13 of the precooler 12 is not particularly limited. For example, the upstream and downstream fin pitches may be uniformly 5 mm. Further, the shape of the fin 13 is not particularly limited as in the case of the cooler 11.

<Defrosting device>
FIG. 6 is a diagram showing an arrangement relationship of devices and the like in the cooler chamber 10 according to Embodiment 1 of the present invention. In the present embodiment, as a defrosting device that removes frost attached to the cooler 11 and the precooler 12, a knitting heater 30 and a radiant heater 34 are provided. As shown in FIGS. 5 and 6, the click heater 30 is disposed in close contact with the fins 13 of the cooler 11. Moreover, the radiant heater 34 is arrange | positioned at the lower part of the cooler 11, as shown in FIG. In the present embodiment, the knuckle heater 30 and the radiant heater 34 are caused to generate heat at the same time, and the frost attached to the cooler 11 and the precooler 12 is melted. The heater roof 35 is disposed above the radiant heater 34. For example, at the time of defrosting, the heater roof 35 prevents water (drain water) dripping from the cooler 11 from frost melting and directly hitting the radiant heater 34. The drip tray 31 is disposed below the cooler 11. The drip tray 31 receives water dropped from the cooler 11 and the precooler 12. The drain groove 32 discharges the water received by the drip tray 31 from the cooler chamber 10. The water discharged from the cooler chamber 10 is evaporated by the heat of the compressor 21 in the machine chamber 20, for example, and discharged outside the warehouse.

<Arrangement of freezer compartment return port 41 and refrigerator compartment return port 42>
The freezer compartment return port 41 communicates, for example, the freezer compartment 4, the ice making chamber 3, and the cooler compartment 10, and the opening portion of the blocking wall 40 through which air flows from the freezer compartment 4, the ice making compartment 3, etc. to the cooler compartment 10. It is. As shown in FIG. 6, in the refrigerator 100 of the present embodiment, the lower edge of the opening portion of the freezer return port 41 is the cooler 11 with respect to the height direction relationship between the freezer return port 41 and the cooler 11. The positional relationship in the height direction between the cooler 11 and the freezer compartment return port 41 is defined so as to be located above the lower end of. Therefore, a part of the blocking wall 40 that blocks the freezer compartment 4 and the cooler compartment 10 is opened. In FIG. 6, the flow of air passing through the freezer compartment return port 41 is indicated by solid arrows.

  The refrigerating room return port 42 is a part that communicates with the first refrigerating room 1, the second refrigerating room 5, etc., and air flows from the first refrigerating room 1, the second refrigerating room 5, etc. to the cooler room 10. In the figure, the refrigerator compartment return port 42 communicating with the second refrigerator compartment 5 is shown. The refrigerator compartment return port 42 defines the positional relationship in the height direction between the refrigerator compartment return port 42 and the freezer compartment return port 41 so that it is below the lower edge of the opening portion of the freezer compartment return port 41. In FIG. 6, the flow of air passing through the refrigerator compartment return port 42 is indicated by a dotted arrow.

  Here, as described above, in the present embodiment, the lower edge of the opening portion of the freezer return port 41 is above the lower end of the cooler 11. For this reason, the cooler 11 can be seen from the freezer return port 41 provided in the freezer compartment 4. Therefore, in the present embodiment, the airflow direction plate 33 is provided in the freezer compartment return port 41 so that the cooler 11 cannot be seen from the freezer compartment 4 and hands, fingers, etc. are prevented from touching the cooler 11.

  FIG. 7 is a diagram illustrating the function of the wind direction plate 33 in the refrigerator 100 according to Embodiment 1 of the present invention. As shown in FIGS. 6 and 7, in the refrigerator 100 according to the present embodiment, the wind direction plate 33 is inclined so that the end on the freezer compartment 4 side is located above the end on the cooler compartment 10 side. It is installed in the direction of the board. For example, in the case where the cooler 11 is visible from the freezer return port 41 as in the present embodiment, if the direction of the wind direction plate 33 is horizontal, the drain water dripped during defrosting is the wind direction. There is a possibility of staying on the plate 33. When the refrigerator 100 is normally operated in this state, there is a possibility that the wind direction plate 33 freezes and the freezer compartment return port 41 is blocked. Further, the wind direction plate 33 is attached with frost, ice, etc., and the appearance is poor. Therefore, in order to allow the drain water not to stay on the wind direction plate 33 but to flow to the drip tray 31, the wind direction plate 33 is inclined in the present embodiment.

  As described above, according to the refrigerator 100 of the first embodiment, with respect to the wind direction plate 33 installed at the freezer compartment return port 41, the end on the cooler 11 side faces downward from the end on the freezer compartment 4 side. By inclining in this way, the drain water generated at the time of defrosting can be guided to the drip tray 31 without remaining on the wind direction plate 33. For this reason, it can prevent that drain water becomes frost, ice, etc., and obstruct | occludes the freezer compartment return port 41. FIG.

Embodiment 2. FIG.
8 and 9 are views showing the freezer compartment return port 41 portion of the refrigerator 100 according to Embodiment 2 of the present invention. In the first embodiment, the freezer compartment return port 41 is formed by opening a part of the blocking wall 40 at a portion that becomes the freezer compartment return port 41. In the present embodiment, a part of the blocking wall 40 is a rib 40a, and the rib 40a is formed in a lattice shape at the freezer return port 41. Even when drain water flows out from the freezer return port 41 to the freezer compartment 4, the drain water is transmitted through the rib 40 a. Then, a communication hole 43 that guides the drain water to the drip tray 31 is provided so that the drain water transmitted through the rib 40 a flows to the drip tray 31.

  As described above, according to the refrigerator 100 of the second embodiment, by forming the rib 40a in the portion that becomes the freezer return port 41 for the blocking wall 40 that shuts off the freezer room 4 and the cooler room 10, For example, even when dew flows into the freezer compartment from the freezer return port 41, it can be guided to the drip tray 31 through the communication hole 43 through the rib 40 a. For this reason, the appearance of the freezer compartment 4 can be improved. Moreover, the quality of the refrigerator 100 can be improved.

Embodiment 3 FIG.
10 and 11 are views showing the freezer compartment return port 41 portion of the refrigerator 100 according to Embodiment 3 of the present invention. In the present embodiment, a rib 40 a is formed in the freezer compartment return port 41, and a cover 44 is attached at a position closer to the air inflow side than the wind direction plate 33. The cover 44 is formed with a slit 45 serving as a ventilation hole through which air passes.

  By attaching the cover 44 to the freezer compartment return port 41, frost formation of the cooler 11 can be hidden. For this reason, the freezer compartment 4 can be looked good. Further, the heat of the heater can be prevented from entering the freezer compartment 4 during defrosting. For this reason, energy efficiency can be improved.

  DESCRIPTION OF SYMBOLS 1 1st refrigerator compartment, 2 switching room, 3 ice-making room, 4 freezer compartment, 5 2nd refrigerator compartment, 6 doors, 10 cooler compartment, 11 cooler, 12 precooler, 13 fin, 14 heat exchanger tube, 15 cooling Fan, 20 Machine room, 21 Compressor, 22 Condenser, 23 Capillary tube, 30 Kakikomi heater, 31 Drip tray, 32 Drainage groove, 33 Wind direction plate, 34 Radian heater, 35 Heater roof, 40 Barrier wall, 40a Rib, 41 Refrigeration Chamber return port, 42 refrigerator compartment return port, 43 communication hole, 44 cover, 45 slit, 100 refrigerator.

Claims (3)

A freezer room for storing objects to be frozen;
A cooler for cooling the freezer air;
A circulation fan that forms an air flow, passing the air returning from the freezer compartment through the cooler and sending it to the outlet of the freezer compartment,
The freezer compartment has a freezer compartment return port to which air from the freezer compartment returns, on the back wall,
The cooler is disposed on the refrigerator back side of the wall,
The freezer compartment return port is arranged at a position where the lower edge of the wall formed by the opening portion and the wall on the back side is above the lower end of the cooler in the height direction.
Wherein is installed in an opening portion of the freezer compartment return port, have a wind direction plate, wherein the freezing chamber side up and the cooler side is inclined downward,
A drip tray disposed below the cooler and having a drain hole;
A communication hole installed in the freezer and communicating with the drip tray;
A refrigerator comprising a rib for guiding water attached to the wall that cuts off between the freezer and the cooler to the communication hole . From below the opening portion of the freezing compartment return port refrigerator according to claim 1 having a refrigerating compartment return port for returning air from the refrigerating compartment for storing refrigerated target. The refrigerator according to claim 1 or 2 , further comprising a cover having a vent hole and covering the freezer compartment return port.

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