JP2007127410A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator having a storage chamber which is cooled uniformly with the cold released from a wide area uniformly, where temperature sensing means is not installed in the member, whereby allowing the member to be installed in a wide region, capable of enhancing the cooling efficiency, sensing the intra-chamber temperature still more accurately owing to unlikelihood of the temperature sensing means of being influenced by the cold of the member, and keeping inside the chamber at a still more proper temperature. <P>SOLUTION: The refrigerator is equipped with the storage chamber 11 to store objects to be stored, coolers 21 and 25 to produce the cold flowing into the storage chamber 11, cold air passages 23, 27, 28, 30 to lead the cold air to the storage chamber 11, the member 42 to release the cold owing to the cold air flowing through the cold air passages 23, 27, 28, 30 into the storage chamber 11, and the temperature sensing means 75 installed around the member 42. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a refrigerator that delivers cold air into a storage room.

  Conventionally, this kind of refrigerator is operated when an air circulation duct provided in the vertical direction in the back center of the refrigerator compartment and a compressor provided below the air circulation duct are stopped, as disclosed in Patent Document 1, for example. A blower for circulating air, and a discharge port for discharging cool air from the blower which is provided vertically at both ends at a predetermined interval from the air circulation duct and is operated by the compressor and cooled by the cooler. And a cold air discharge duct having temperature detection means for detecting the temperature of the refrigerator compartment.

Japanese Patent Laid-Open No. 10-54638

  In the refrigerator as described above, during the operation of the compressor, in the vicinity of the back center of the refrigerator compartment where the air circulation duct is located, it is difficult to cool because the cool air cooled by the cooler is difficult to rotate, and the cool air discharge duct of the cool air discharge duct There is a problem that only the vicinity tends to cool well, there is a problem that there is a lack of uniform cooling capacity in the warehouse, and many parts of the temperature detection means are the parts of the discharge ports in the same section partitioned by shelves. It is in the lower position, and when the compressor is operating, part of the temperature detection means is located along the path of the cold air in the warehouse, so there is a risk of cold air coming into contact with the temperature detection means, and accurate detection of the internal temperature There is a problem that the inside of the cabinet cannot be maintained at an appropriate temperature, and when the air circulation blower is operated, the area around the center of the air circulation duct at the center sandwiched between the right and left by the air inlet Is the circulating air flow Hardly around reservoir there is a problem that it is difficult to cool.

  The refrigerator of the present invention has solved the above-described problems, and the refrigerator of the present invention includes a storage chamber for storing stored items, a cooler for generating cold air flowing into the storage chamber, and a back surface of the storage chamber. A cool air passage through which cool air from the cooler flows, a member that is provided on the back side of the storage chamber and discharges cool heat into the storage chamber, and cool air from the cooler flows into the cool air passage A heat insulating member provided on the back surface of the storage chamber on the side, a discharge port that is arranged around the member and discharges cool air flowing through the cold air passage to the storage chamber, and is different from the discharge port around the member And a temperature detecting means arranged at a position for detecting the temperature of the storage chamber.

  The refrigerator according to the present invention is characterized in that the discharge port is arranged on a side of the member.

  The refrigerator of the present invention is characterized in that the discharge port is disposed above the member.

  The refrigerator of the present invention is characterized in that a return port for returning cool air to the cooler is provided in the storage chamber, and the temperature detecting means is arranged between the return port and the discharge port.

  According to the present invention, a part of the cold heat of the cold air passing through the cold air passage is transmitted to the member composed of the cold storage member and the heat conduction member, and is discharged from the entire surface into the storage chamber. Therefore, the storage chamber is uniformly cooled by the cold heat uniformly discharged from a large area. In addition, since there is no temperature detection means in the member, the member can be provided in a wide area, the cooling efficiency is improved, and the temperature detection means is not easily affected by the cold of the member, so that the storage can be performed more accurately. The internal temperature can be detected and the interior can be kept at a more appropriate temperature.

  Further, according to the present invention, part of the cold heat of the cold air passing through the cold air passage is transmitted to a member having a larger area including a cold storage member and a heat conduction member, and discharged from the entire surface into the storage chamber. Accordingly, the storage chamber is uniformly cooled by the cold heat that is uniformly discharged from a larger area. In addition, since the temperature detection means is located above the cold air discharge port around the member, the member can be provided in a wide area, and the cooling efficiency is further improved. Further, the temperature detection means is affected by the cold of the member or the discharged cold air. Because it is hard to receive, it can detect the more accurate inside temperature and keep the inside temperature more appropriate.

  Further, according to the present invention, the discharge port is provided in accordance with the conditions in the section divided into appropriate spaces on the shelf, and the temperature detection means is provided above the discharge port closer to the center in the vertical direction. Since the temperature detection means is not easily affected by the cold of the member or the exhaled cold air, it is possible to detect a more accurate average inside temperature, and there is a temperature detection means above the cold air outlet around the member. A member can be provided in the region, and the cooling efficiency is further improved. The storage chamber is further uniformly cooled to an appropriate temperature by the cold heat discharged from the entire surface of the member into the storage chamber and the cool air from the discharge port.

  Further, according to the present invention, the area in the vertical direction of the temperature detecting means can be reduced, the area where the discharge port is located can be widened, the discharge port is provided according to the conditions, and the internal temperature can be made uniform.

  In addition, according to the present invention, the upper side of the passage of the discharge port provided with the temperature detection means is inclined downward toward the front, so that the discharged cool air flows downward, and The influence of the cold air on the temperature detection means is eliminated, and the interior can be kept at an appropriate temperature.

  Hereinafter, embodiments of the refrigerator of the present invention will be described with reference to the drawings.

  1 is a side sectional view showing a refrigerator according to a first embodiment of the present invention, FIG. 2 is a front view of a refrigerator compartment of the refrigerator of FIG. 1, FIG. 3 is a detailed view of a main part of the refrigerator of FIG. 1, and FIG. 5 is a perspective view showing a member, FIG. 6 is a perspective view showing another member, FIG. 7 is a cross-sectional view of the main part in the vicinity of the member in FIG. 5, and FIG. 8 is in the vicinity of the member in FIG. FIG. 9 is a side sectional view of a refrigerator according to a second embodiment of the present invention, and FIG. 10 is a front view of a refrigerator compartment of the refrigerator of FIG.

  In FIG. 1, the refrigerator 1 has an inner box 2b disposed inside an outer box 2a that covers the outside, and a gap between the outer box 2a and the inner box 2b is filled with a heat insulating material 2c such as polyurethane foam. Reference numeral 1a denotes an electrical box including a control device 1b for controlling the operation of the refrigerator 1, and the control device 1b is electrically connected to each electrical component described later of the refrigerator 1. Moreover, the inside of the refrigerator 1 is divided into the refrigerator compartment 11, the vegetable compartment 12, and the freezer compartment 13 in order from the top.

  The vegetable compartment 12 and the freezer compartment 13 are partitioned by a partition frame 17 made of a heat insulating member and a partition plate 19 made of a heat insulating member, and the freezer compartment 13 is further partitioned into an upper part and a lower part by a partition frame 18 made of a heat insulating member. . The refrigerator compartment 11 and the vegetable compartment 12 are partitioned by a partition frame 16 made of a heat insulating member and partition plates 31 and 32 made of a resin molded product. The partition plate 32 is provided with a through hole 32a.

  An ice greenhouse 14, which is an isolation room partitioned by a partition plate 46, is provided at the lower part of the refrigerator compartment 11. The refrigerator compartment 11 is provided with a plurality of shelves 45, and the refrigerator compartment 11 is partitioned into a plurality of shelves 45 and partition plates 46. The front surface of the refrigerator compartment 11 can be opened and closed by a rotating heat insulating door 3. The upper part of the vegetable compartment 12, the freezer compartment 13, and the lower part of the freezer compartment 13 can be opened / closed by heat-insulating doors 4, 5 and 6, respectively, so that the storage containers 54, 55 and 56 can be pulled out. ing.

  A compressor 20 is disposed at the rear of the freezer compartment 13. A condenser (not shown) is connected to the compressor 20 via a discharge pipe 20a, and coolers 21 and 25 are connected in series via a suction pipe 20b. The condenser and the cooler 25 are connected via a first capillary tube (not shown). A second capillary tube (not shown) is disposed between the coolers 21 and 25.

  Thus, a refrigeration cycle is configured, and when the refrigeration cycle operation is performed, the coolers 21 and 25 are cooled. Defrost heaters 61 and 62 for defrosting the coolers 21 and 25 are provided below the coolers 21 and 25. 63 and 64 are drain receiving members.

  In addition, a refrigerant flow switching means is provided between the condenser and the first capillary tube, and the switching means and the cooler 21 are connected via a third capillary tube (not shown). And only the cooler 21 can be cooled by switching the switching means.

  The cooler 21 is disposed in the cool air passage 23, and the cool air passage 23 is formed by the inner box 2b and an evaporative cover 33 made of a resin molded product. A blower 22 is disposed above the cooler 21 in the cool air passage 23. The cold air passage 23 communicates with the freezer compartment 13 through a discharge port 13a and a return port 13b to the freezer compartment 13 provided in the back plate 33a.

  The cooler 25 is disposed in the cold air passage 27. The lower part of the cold air passage 27 is formed by the inner box 2 b and the back plate 34 of the vegetable compartment 12. The back plate 34 is made of a heat insulating member, and prevents overcooling of the vegetable compartment 12 that is provided close to the cooler 25. A blower 26 is disposed above the cooler 25 in the cool air passage 27. The cold air passage 27 communicates with the vegetable compartment 12 through the return port 12b.

  The upper part of the cold air passage 27 is formed by a heat insulating member 36 fixed to the back plate 35 of the ice greenhouse 14 and the inner box 2b. The heat insulating member 36 is provided with a discharge port 36a. When the front view of the refrigerator compartment 11 is shown in FIG. 2, the discharge port 35a is provided in the back plate 35 in the same position as the discharge port 36a. The refrigerator compartment 11 communicates with the cold air passage 27 through the discharge ports 35a and 36a.

  The cold air passage 27 communicates with the cold air passage 28 in the rear portion of the refrigerator compartment 11. In FIG. 2, the cool air passage 28 is branched by a rib 28d into a central passage 28a (second passage) disposed substantially at the center and side passages 28b (first passages) provided on both sides of the central passage 28a. Yes. The ribs 28d are formed integrally with a back plate 70 described later. The cold air passage 27 is also branched into branch passages 27 a and 27 b corresponding to the cold air passage 28.

  A blower 29 is disposed at the lower end of the central passage 28a. A blower cover 41 facing the refrigerator compartment 11 is attached to the front surface of the blower 29. A plurality of openings 41 a are formed in the blower cover 41.

  When the detailed view of the blower 29 is shown in FIG. 3, the central passage 28a circulates through the cold air passage 27 by the air taken in from the refrigerator compartment 11 by the blower 29 through the opening 41a and the blower 26 (see FIG. 1). Cold air is mixed. The cold air flowing through the cold air passage 27 collides with the wall surface 41b of the blower cover 41 and is guided toward the blower 29 by the guide portion 41c. When the blower cover 41 is made of metal, the guide portion 41c may be cut and raised and formed integrally.

  At this time, an appropriate heat insulating member may be provided on the inner surface of the blower cover 41 in the cold air flow area from the cold air passage 27 to prevent condensation. In addition, when the blower cover 41 is formed of metal or the like, cold heat of the cold air passing through the central passage 28 a is released from the blower cover 41 into the refrigerator compartment 11.

  The opening 41 a is formed above the guide portion 41 c and is arranged outside the course of the cold air flowing through the cold air passage 27. This prevents cold air flowing through the cold air passage 27 from entering the refrigerator compartment 11 from the opening 41a. As a result, it is possible to prevent local overcooling of the refrigerator compartment 11 due to cold air leakage.

  The cold air passage 28 is formed by a member 42 forming the inner wall of the refrigerating chamber 11 and a back plate 70 provided on the inner box 2b. The back plate 70 is formed integrally with the back plate 35. The member 42 is formed of a heat conductive member having a heat conductivity having a shape as shown in FIG. 5 (for example, aluminum having good workability and high antirust effect, an alloy thereof, stainless steel, or the like).

  This makes it possible to store cold and release cold. In addition, when the thickness of the said heat conductive member is thick, cold storage capacity goes up and intensity | strength also increases. When the thickness is small, the efficiency of releasing cold heat increases, which is advantageous for weight reduction. Therefore, a thin plate material or a thick plate material may be selected and provided at an appropriate place according to the purpose.

  The surface area can be increased by providing an uneven shape on the surface of the member 42 by pressing or the like. As a result, the amount of cold storage and the amount of released heat is increased, and the cooling efficiency can be improved. Furthermore, the intensity | strength of the member 42 can be reinforced by providing the recessed part or convex part which continues in a linear form.

  Moreover, the cross-sectional detailed drawing of the upper end of the member 42 and a lower end part is shown in FIG. 7, FIG. According to these drawings, the member 42 is locked by an upper mounting portion 71 provided on the back plate 70 and a lower mounting portion 72 provided on the back plate 35. When the lever portion 71a of the upper mounting portion 71 is pushed up with fingers, the engagement of the claw portion 71b is released.

  In this state, the member 42 can be detached from the lower mounting portion 72 by tilting the upper part of the member 42 forward and pulling it upward, so that the member 42 is detachable. As a result, the cold air passage 28 and the member 42 can be easily cleaned on the cold air passage 28 side. The lower part of the member 42 is hermetically sealed with a sealing material 73 fixed to the heat insulating member 36.

  Further, since the temperature detecting means 75 described later, which is electrically connected to the control device 1b, is not provided on the member 42 but is provided in the vicinity thereof, the member 42 is further easily attached and detached. Yes.

  When the top sectional view of the refrigerator compartment 11 is shown in FIG. 4, most of the cold heat of the cold air passing through the side passage 28 b is not transmitted to the member 42 on the surface on the side passage 28 b side of the member 42 covering the side passage 28 b. Thus, the heat insulating member 28c is arranged. A side wall of the side passage 28b is formed by a back plate 70, and a plurality of openings 70a are provided on the side wall.

  A wall surface portion 70 c that covers the outer periphery of the member 42 is formed on the back plate 70. A plurality of discharge portions 70b communicating with the opening 70a are recessed in the wall surface portion 70c. Accordingly, the side passage 28b communicates with the refrigerating chamber 11 through the discharge portion 70b and the opening 70a, and the cool air can be discharged into the refrigerating chamber 11.

  In FIG. 2, the wall surface portion 70 c is formed in the vicinity of the same height as the shelf 45 placed on the placement portion 74, so that food or the like placed on the shelf 45 does not fall onto the discharge portion 70 b. . The opening 70a has a slit shape so that the stored item does not fall into the side passage 28b. The back plate 70 is formed with ribs 70d that guide the cool air to the discharge part 70b. In addition, in this figure, the shelf 45 and the partition plate 46 are drawn with the dashed-two dotted line in order to make those backs intelligible.

  The refrigerator compartment 11 is divided into a plurality of shelves 45, and a temperature detecting means 75 is provided above the discharge part 70b in the compartment from the center in the vertical direction. The temperature detecting means 75 is made of, for example, a thermistor, and projects the wall surface portion 70c of the back plate 70 and a part of the wall surface portion 70c to the refrigerating chamber 11 side, and the back side of the opening 70e in which the portion is opened in a slit shape The temperature detection means 75 is attached near (inner box 2b side).

  Therefore, the cold air discharged from the discharge portion 70b through the opening 70a does not directly hit the temperature detecting means 75, and mixes with the air in the space partitioned by the shelves 45, 45, and enters the shelf 45. After the stored product is cooled, it is led to the through-hole 32a below the refrigerator compartment 11 and flows downward from the front of the shelf 45.

  At this time, the internal air mixed with the cool air discharged from the discharge section 70b of the space partitioned by the shelves 45, 45 also fills the temperature detection means 75 and the direct influence of the cold of the member 42 is also caused. Without being detected as the internal temperature of the refrigerator compartment 11. In addition, a shielding rib 70f is provided around the refrigerator compartment 11 side of the opening 70e as necessary so that the cold air discharged from the discharge portion 70b does not directly hit the temperature detecting means 75.

  The temperature detecting means 75 has a central portion at a position about 50 mm above the discharge portion 70 b and a position about 40 mm below the back surface of the horizontal surface of the shelf 45. The internal temperature is detected.

  The temperature detection means 75 is 10 mm or more above the discharge section 70b in the same section divided by the shelves 45, 45, and 20 mm or less below the rear surface of the horizontal surface of the shelf 45 located above the shelf 45. The inside temperature corresponding to the average room temperature of the refrigerator compartment 11 is detected without being influenced by the cold air flow from the discharge section 70b or the relatively warm air drifting on the back surface of the upper shelf 45.

  The cool air in the cabinet cooled by the cold heat of the member 42 flows downward in the vicinity of the refrigerator compartment 11 side of the member 42 and flows in the interior space while mixing with the cool air discharged from the discharge portion 70b. Therefore, the cool air by the cold heat does not directly hit the temperature detecting means 75, and the inside of the cabinet can be kept at a more appropriate temperature.

  In some cases, the discharge part 70b communicating with the opening part 70a does not need to be provided in each of the spaces partitioned into a plurality of sections by the shelf 45, and the discharge part 70b is provided in the space below the refrigerator compartment 11. 70b is not provided, and only the upper two shelves 45, 45 are provided with the discharge portion 70b communicating with the opening 70a on the left and right sides, and the rear end of the shelf 45 and the rear surface of the refrigerator compartment 11 (of the member 42). If a gap is provided between the front and rear of the refrigerating chamber 11, the cool air is lowered from the upper part of the refrigerator compartment 11, and the lower space is also cooled. The effect also works and the refrigerator compartment 11 is uniformly cooled.

  Further, since the temperature detecting means 75 has the left-right direction as the longitudinal direction, the area of the temperature detecting means 75 in the vertical direction can be reduced, and the area where the discharge port is located can be widened. 70b is provided, and the internal temperature is further uniformed.

  Further, if the upper wall surface portion communicating with the opening portion 70a of the discharge portion 70b is formed to be slightly inclined so as to go downward toward the discharge portion 70b, the discharged cold air flows out downward. Further, the influence of the cold air on the temperature detecting means 75 provided above is eliminated, and the interior of the refrigerator can be kept at a more appropriate temperature. Note that the same effect as described above can be obtained even if a protrusion corresponding to the shielding plate 70f is provided on the upper part of the discharge part 70b so as to be inclined downward as it goes forward.

  A ceiling duct 54 is formed on the ceiling portion of the refrigerator compartment 11 by an upper plate 43 made of a resin molded product and the inner box 2b. The ceiling duct 54 is arranged side by side and communicates with the central passage 28a. The cold air passing through the central passage 28 a is diffused left and right by ribs 70 g formed on the back plate 70 and guided to the ceiling duct 54.

  Then, a plurality of ceiling discharge ports 43 a provided in the front-rear direction of the upper surface plate 43 can be dispersed left and right to discharge cool air. Since the cold air passing through the central passage 28 a is diffused to the left and right before flowing into the ceiling duct 54, the cold air is sufficiently discharged also from the ceiling outlet 43 a provided near the back plate 70 of the refrigerator compartment 11.

  For this reason, cold air comes down from the entire ceiling of the refrigerator compartment 11, which helps to make the internal temperature uniform. An illumination lamp 51 covered with a transparent illumination cover 53 is provided between the left and right ceiling ducts 54.

  The member 42 covers many areas on the back surface of the refrigerator compartment 11 and serves as a reflector of the illumination lamp 51. The reflected light of the illumination lamp 51 by the member 42 is much of the refrigerator compartment 11. Illuminate the area. Since the temperature detecting means 75 is located at a place other than the member 42, the member 42 can be taken sufficiently wide without lacking, and the effect as the reflecting plate can be sufficiently obtained.

  If the ceiling duct 54 is formed of the same material as the member 42 (for example, a heat conducting member), cooling to the interior by the cooling effect is also performed from the entire area of the ceiling duct 54 on the refrigerator compartment 11 side. It is obvious that the temperature inside the chamber can be made more uniform and the effect as a light reflector can be obtained.

  In the refrigerator 1 having the above-described configuration, the internal temperature of the freezer compartment 13 rises, and the temperature detected by temperature detection means (not shown) provided in the freezer compartment 13 exceeds a predetermined temperature (for example, −18 ° C.). When the compressor 20 and the blower 22 are driven by the control device 1b, the air in the freezer compartment 13 is guided to the cold air passage 23 from the return port 13b. The air is cooled by exchanging heat with the cooler 21 and flows into the freezer compartment 13 from the discharge port 13a. Thereby, the inside of the freezer compartment 13 is cooled to a predetermined temperature.

  When the internal temperature of the refrigerator compartment 11 rises and the temperature detected by the temperature detecting means 75 provided on the back of the refrigerator compartment 11 exceeds a predetermined temperature (for example, 5 ° C.), the compressor 20 and When the blowers 26 and 29 are driven by the control device 1b, the air in the vegetable compartment 12 is guided to the cold air passage 27 from the return port 12b.

  The air is cooled by exchanging heat with the cooler 25 to generate cold air. A part of the cold air flows into the ice greenhouse 14 from the openings 35a and 36a. Thereby, the inside of the ice greenhouse 14 is cooled to −1 ° C., for example.

  The other cold air branches into the central passage 28a and the side passage 28b and proceeds. The cold air passing through the side passage 28b is guided by the rib 70d and discharged from the discharge portion 70b into the refrigerator compartment 11. The cold air passing through the central passage 28a is mixed with the air in the refrigerator compartment 11 guided from the opening 41a to the central passage 28a. And it passes through the ceiling duct 54 and is discharged from the ceiling discharge port 43a.

  A part of the cold heat generated by the cold air flowing through the central passage 28a is transmitted to the member 42, and is released as cold heat from the entire surface including the front surface of the side passage 28b. Therefore, the inside of the refrigerator compartment 11 is efficiently and uniformly cooled by the cold heat from the member 42 and the cold air discharged from the discharge part 70b and the ceiling discharge port 43a.

  The air in the refrigerator compartment 11 passes between the shelves 45 and the front of the shelves 45, circulates through the cold air passage 30 from below the ice greenhouse 14 through the opening 32 a, and flows into the front of the vegetable compartment 12. Furthermore, the inside of the vegetable compartment 12 is cooled through the lower side from the front surface of the storage container 54. Then, the cool air is circulated through the return port 12b to the lower part of the cooler 25.

  Then, based on the detection result of the temperature detecting means 75, the compressor 20 and the blower 26 are controlled by the control device 1b so as to operate and stop, and the temperatures of the refrigerator compartment 11 and the vegetable compartment 12 are maintained at a temperature of about 3 ° C., for example. It has come to be.

  When the temperature detected by the temperature detecting means 75 exceeds a predetermined temperature (for example, 5 ° C.), the compressor 20 and the blowers 26 and 29 are operated, and the cool air cooled by the cooler 25 When the refrigerator compartment 11 and the vegetable compartment 12 are cooled and the temperature detection means 75 reaches a predetermined detection temperature (for example, 1 ° C.), the compressor 20 and the blowers 26 and 29 are stopped.

  Thereafter, when the temperature detection means 75 reaches a predetermined detection temperature (for example, 3 ° C.), the control device 1b controls to operate one or both of the blowers 26 and 29 while the cooling by the cooler 25 is stopped. The cool air accumulated in the member 42 cools the cold air passing through the central passage 28a, and the cool air cools the inside of the refrigerating chamber 11. Therefore, the refrigerating chamber 11 is kept at a low temperature for a long time, and the compressor 20 is turned on. The number of OFF cycles is reduced, and a large amount of power consumption at the start of the compressor 20 can be reduced, leading to energy saving.

  Furthermore, by the operation of the blower 29, the air in the refrigerator compartment 11 is agitated, the cool air blowing to the storage is increased, the cooling efficiency is improved, and the cool air temperature in the refrigerator is further uniform. When the compressor 20 is stopped and the blower 26 is operated, the cooler 25 can be further defrosted to humidify the refrigerator compartment 11.

  In addition, according to this embodiment, it is possible to cool only the freezer compartment 13 by cooling only the cooler 21 by the refrigerant flow switching means (not shown), and when cooling the refrigerator compartment 11, The refrigerating room 11, the vegetable room 12, and the freezing room 13 are cooled by cooling the coolers 25 and 21 by the switching means.

  Further, according to the present embodiment, a part of the cold heat of the cold air passing through the central passage 28a conducts heat through the member 42 functioning as a heat conduction plate and is discharged into the refrigerator compartment 11 from the entire surface. Therefore, the refrigerator compartment 11 is uniformly cooled by the cold heat uniformly discharged from a large area covering the central passage 28a and the side passage 28b. And since the said temperature detection means 75 is not located in the said member 42, the temperature detection means 75 is hard to receive the influence by the said cold, and detects the temperature in the refrigerator compartment 11 more correctly.

  At this time, not much cold heat is transmitted to the member 42 from the cold air passing through the side passage 28b by the heat insulating member 28c. For this reason, when a lot of cool air flows through the cool air passage 27, the condensation of the member 42 and the discharge portion 70b can be prevented, and drying in the refrigerator compartment 11 can be prevented. And the cold air of desired temperature and flow volume can be distribute | circulated by changing the area which installs the heat insulation member 28c.

  Further, when the temperature of the cold air passing through the cold air passage 28 is lowered or the cooling capacity is increased by increasing the flow rate of the cold air, there is a possibility that dew condensation may occur on the refrigerating chamber 11 side of the member 42 near the central passage 28a. In order to reduce the cooling by the cool air of 42, a thin heat insulating member may be provided on the member 42 side of the central passage 28a.

  Moreover, since the discharge part 70b and the ceiling discharge port 43a are provided with two or more by the back surface and upper surface of the refrigerator compartment 11, cold air disperse | distributes and flows into the refrigerator compartment 11. FIG. For this reason, the refrigerator compartment 11 is cooled uniformly and rapidly.

  Although the discharge part 70b may be formed by opening the member 42, it is desirable to provide the discharge part 70b around the outside of the member 42 as in the present embodiment. That is, since it does not open to the front side, first, the cool air passage 28 is covered and the aesthetic appearance is improved. Secondly, since cold air is not discharged directly to the front surface, noise in the side passage 28b and sound of the discharge air at the opening 70a are not directly emitted to the front surface, and the noise is reduced.

  Thirdly, since the member 42 does not have an opening for discharging cold air or detecting temperature, the entire surface of the member 42 contributes to uniform discharge of cold heat, and the inside temperature is further uniformed. As a light reflecting surface, it can be used in a wide range without unevenness. Etc. can be obtained.

  In addition, the member 42 facing the central passage 28a is directly transmitted with cold by cold air, but the member 42 facing the side passage 28b is transmitted with cold from the central passage 28a portion. For this reason, the released cold heat is slightly reduced in the side passage 28b, and temperature variations in the refrigerator compartment 11 occur.

  For example, if the discharge portion 70b is arranged on the central passage 28a, the temperature variation becomes larger. In this embodiment, the discharge portion 70b is disposed between the rib 28d that forms the side wall of the central passage 28a and the side wall of the refrigerator compartment 11. Almost in the center. As a result, the region including the front of the side passage 28b and the vicinity of the side wall of the refrigerator compartment 11 is cooled by the cool air from the discharge section 70b, so that the temperature variation is reduced and cooling by more uniform cooling heat release is performed. be able to. Further, the member 42 can take the maximum size in consideration of the arrangement of the discharge portion 70b, and the inside of the refrigerator compartment 11 can be cooled more uniformly by discharging the cold air from both the discharge portions 70b and releasing the cold heat of the member 42. .

  Further, the member 42 may be a cold storage member in which a jelly-like or liquid cold insulating material 42a as shown in FIG. 6 is enclosed by packaging materials 42b and 42c. If it does in this way, the member 42 will be cold-stored more by the cold heat | fever of the cold air which distribute | circulates the inside of the cold passage 28, and it discharge | releases as cold heat according to the temperature distribution in the refrigerator compartment 11. Therefore, the refrigerator compartment 11 is cooled uniformly.

  Furthermore, the cool storage member can absorb heat and dissipate heat when the compressor 20 is stopped or the temperature of the cool air passage 28 fluctuates, so that the cool air temperature in the cool air passage 28 can be maintained. At this time, since the cold storage member forms the inner wall of the refrigerator compartment 11, the space of the refrigerator compartment 11 can be widened, and the space saving of the refrigerator 1 can be achieved. More preferably, the packaging materials 42b and 42c are made of an aluminum alloy or stainless steel having thermal conductivity.

  Further, the cold air generated at a low temperature by the cooler 25 is slightly heated by mixing with the air in the refrigerator compartment 11. Thereby, the dew condensation and icing which arise in the member 42 and the ceiling discharge opening 43a vicinity can be prevented more, and drying of the refrigerator compartment 11 and the vegetable compartment 12 can be prevented.

  Furthermore, by providing a cooler 25 that cools the refrigerator compartment 11 and the vegetable compartment 12 and a cooler 21 that cools the freezer compartment 13, the temperature of the cold air flowing through the cold air passages 27 and 28 is changed to the temperature of the cold air inside the cold air passage 23. It can be set higher. Thereby, the dew condensation and freezing which generate | occur | produce on the member 42 can be prevented more.

  Further, the member 42 is erected on the back surface of the refrigerator compartment 11 and extends in the vertical direction. For this reason, when the heat insulation door 3 is frequently opened and closed and the temperature and humidity in the refrigerator compartment 11 are extremely increased, even if condensation occurs on the member 42 and water droplets are generated, they are not directly dropped on the stored items. Therefore, a good preservation state can be maintained without damaging the stored product.

  At this time, when the blowing of the cold air in the cold air passage 28 cooled by the cooler 25 is stopped, the member 42 approaches the temperature in the refrigerator compartment 11 and the inside of the refrigerator compartment 11 is dried due to the temperature rise. Thereby, part of the water droplets evaporates while flowing down the member 42 and the back plate 35. Therefore, the humidity in the refrigerator compartment 11 can be raised again. Furthermore, if a fence-like protective wall having a porous shape (for example, an oval hole, a round hole, etc.) capable of air circulation is provided in front of the member 42, the member 42 can be further thinned. It also prevents sticking and breakage.

  Next, FIG. 9 is a side sectional view showing the refrigerator of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In the refrigerator 1, an inner box 2b is arranged inside an outer box 2a that covers the outside, and a gap between the outer box 2a and the inner box 2b is filled with a heat insulating material 2c such as urethane foam.

  Reference numeral 1a denotes an electrical box including a control device 1b for controlling the operation of the refrigerator 1, and the control device 1b is electrically connected to each electrical component described later of the refrigerator 1. Moreover, the inside of the refrigerator 1 is divided into the refrigerator compartment 11, the vegetable compartment 12, and the freezer compartment 13 in order from the top.

  The vegetable compartment 12 and the freezer compartment 13 are partitioned by a partition frame 17 made of a heat insulating member and a partition plate 19 made of a heat insulating member, and the freezer compartment 13 is further partitioned into an upper part and a lower part by a partition frame 18 made of a heat insulating member. . The refrigerator compartment 11 and the vegetable compartment 12 are partitioned by a partition frame 16 made of a heat insulating member and partition plates 31 and 32 made of a resin molded product. The partition plate 32 is provided with a through hole 32a.

  An ice greenhouse 14, which is an isolation room partitioned by a partition plate 46, is provided at the lower part of the refrigerator compartment 11. The refrigerator compartment 11 is provided with a plurality of shelves 45. The front surface of the refrigerator compartment 11 can be opened and closed by a rotating heat insulating door 3. The upper part of the vegetable compartment 12, the freezer compartment 13, and the lower part of the freezer compartment 13 can be opened / closed by heat-insulating doors 4, 5, 6 with sliding front surfaces, respectively, and the storage containers 54, 55, 56 can be drawn out. ing.

  A compressor 20 is disposed at the rear of the freezer compartment 13. A condenser (not shown) is connected to the compressor 20 via a discharge pipe 20a, and a cooler 21 is connected via a suction pipe 20b. The condenser and the cooler 21 are connected via a capillary tube (not shown).

  Thus, a refrigeration cycle is configured, and the cooler 21 is cooled when the refrigeration cycle operation is performed. A defrost heater 62 that defrosts the cooler 21 is provided below the cooler 21. Reference numeral 64 denotes a drain receiving member.

  The cooler 21 is disposed in the cool air passage 23, and the lower portion of the cool air passage 23 is formed by an inner box 2b and an evaporative cover 33 made of a resin molded product. A blower 22 is disposed above the cooler 21 in the cool air passage 23. The cold air passage 23 communicates with the freezer compartment 13 through discharge ports 13a and 13c provided in the back plate 33a and a return port 13b provided in the return port cover 33b.

  The back of the vegetable compartment 12 is covered with the aforementioned partition plate 19, and the pressure chamber 23 a above the cool air passage 23 is formed by the evaporation cover 33 and the partition plate 19. The partition plate 19 made of a heat insulating member prevents overcooling of the vegetable compartment 12 provided in the vicinity of the cooler 21.

  The cold air passage 23 communicates with a cold air passage 28 disposed above the blower 22 via a damper 65. The lower part of the cold air passage 28 is formed by a heat insulating member 36 fixed to the back plate 35 of the ice greenhouse 14 and the inner box 2b. As shown in FIG. 10, the back plate 35 and the heat insulating member 36 are provided with openings 35 a and 36 a at the same position. The ice greenhouse 14 communicates with the cold air passage 28 through the openings 35a and 36a.

  The cold air passage 28 is branched by a rib 28d into a central passage 28a disposed substantially at the center and side passages 28b provided on both sides of the central passage 28a. The ribs 28d are formed integrally with a back plate 70 described later.

  The upper portion of the cold air passage 28 is formed by a member 42 that forms the inner wall of the refrigerator compartment 11 and a back plate 70 provided on the inner box 2b. As in the first embodiment, the member 42 is formed of a heat conductive member having heat conductivity such as an aluminum alloy or stainless steel.

  In the refrigerator compartment 11, as in FIG. 4 described above, a heat insulating member 28 c is arranged on the inner surface of the member 42 covering the side passage 28 b so that most of the cold heat of the cold air passing through the side passage 28 b is not transmitted to the member 42. ing. A side wall of the side passage 28b is formed by a back plate 70, and a plurality of openings 70a are provided on the side wall.

  A wall surface portion 70 c that covers the outer periphery of the member 42 is formed on the back plate 70. A plurality of discharge portions 70b communicating with the opening 70a are recessed in the wall surface portion 70c. Accordingly, the side passage 28b communicates with the refrigerating chamber 11 by the discharge portion 70b and the opening 70a, and the cool air can be discharged into the refrigerating chamber 11.

  The wall surface portion 70c is formed in the vicinity of the same height as the shelf 45 placed on the placement portion 74, so that food or the like placed on the shelf 45 does not fall onto the discharge portion 70b. The back plate 70 is formed with ribs 70d that guide the cool air to the discharge part 70b. The opening 70a has a slit shape so that the stored item does not fall into the side passage 28b. In FIG. 10, the shelf 45 and the partition plate 46 are drawn by a two-dot chain line for easy understanding of the rear thereof.

  The refrigerator compartment 11 is divided into a plurality of shelves 45, and a temperature detecting means 75 is provided above the discharge part 70b in the compartment from the center in the vertical direction. The temperature detecting means 75 is made of, for example, a thermistor, and projects the wall surface portion 70c of the back plate 70 and a part of the wall surface portion 70c to the refrigerating chamber 11 side, and the back side of the opening 70e in which the portion is opened in a slit shape The temperature detection means 75 is attached near (inner box 2b side).

  A ceiling duct 54 is formed on the ceiling portion of the refrigerator compartment 11 by an upper plate 43 made of a resin molded product and the inner box 2b. The ceiling duct 54 is arranged side by side and communicates with the central passage 28a. The cold air passing through the central passage 28 a is diffused left and right by ribs 70 g formed on the back plate 70 and guided to the ceiling duct 54.

  And it can disperse | distribute left and right by the ceiling discharge port 43a provided in the upper surface board 43, and can discharge cold air | gas. An illumination lamp 51 covered with a transparent illumination cover 53 is provided between the left and right ceiling ducts 54.

  In the refrigerator 1 having the above-described configuration, the internal temperature of the freezer compartment 13 rises, and the temperature detected by temperature detection means (not shown) provided in the freezer compartment 13 exceeds a predetermined temperature (for example, −18 ° C.). When the compressor 20 and the blower 22 are driven by the control device 1b, the air in the freezer compartment 13 is guided to the cold air passage 23 from the return port 13b. The air is cooled by exchanging heat with the cooler 21 and flows into the freezer compartment 13 through the discharge ports 13a and 13c. Thereby, the inside of the freezer compartment 13 is cooled to a predetermined temperature.

  Further, when the internal temperature of the refrigerator compartment 11 rises and the temperature detected by the temperature detecting means 75 provided on the back surface of the refrigerator compartment 11 exceeds a predetermined temperature (for example, 5 ° C.), the controller 1b is informed. When the compressor 20 and the blower 22 are driven and the damper 65 is opened, the cold air exchanged with the cooler 21 flows through the cooling passage 28 via the damper 65, and a part of the cold air is an opening portion. It flows into the ice greenhouse 14 from 35a, 36a. Thereby, the inside of the ice greenhouse 14 is cooled to −1 ° C., for example.

  The other cold air branches into the central passage 28a and the side passage 28b and proceeds. The cold air passing through the side passage 28b is guided by the rib 70d and discharged from the discharge portion 70b into the refrigerator compartment. The cold air passing through the central passage 28a passes through the ceiling duct 54 and is discharged from the ceiling outlet 43a.

  A part of the cold heat generated by the cold air flowing through the central passage 28a is transmitted to the member 42, and is released as cold heat from the entire surface including the front surface of the side passage 28b. Therefore, the inside of the refrigerator compartment 11 is efficiently and uniformly cooled by the cold heat from the member 42 and the cold air dispersed and discharged from the discharge portion 70b and the ceiling discharge port 43a.

  The air in the refrigerator compartment 11 passes between the shelves 45 and the front of the shelves 45, circulates through the cold air passage 30 from below the ice greenhouse 14 through the opening 32 a, and flows into the front of the vegetable compartment 12. Furthermore, the inside of the vegetable compartment 12 is cooled through the lower side from the front surface of the storage container 54. Then, the cool air circulates from the outlet (not shown) through the duct (not shown) to the lower part of the cooler 21. The damper 65 opens and closes according to the temperature (in the refrigerator compartment 11) detected by the temperature detecting means 75 similar to that in FIG. 2, and the temperature of the refrigerator compartment 11 and the vegetable compartment 12 is maintained at 3 ° C., for example. .

  According to the present embodiment, as in the first embodiment, the member 42 functions as a heat conduction plate that conducts a part of the cold air passing through the central passage 28 a and releases it into the refrigerating chamber 11. Therefore, the refrigerator compartment 11 is uniformly cooled by the cold heat uniformly discharged from a large area.

  At this time, most of the cold heat is not transmitted to the member 42 from the cold air passing through the side passage 28b by the heat insulating member 28c. For this reason, even if a lot of cool air flows through the cool air passage 27, condensation does not occur in the member 42 and the discharge portion 70b. By changing the area where the heat insulating member 28c is installed, cold air having a desired temperature and flow rate can be circulated.

  Further, by providing the discharge portion 70b around the outside of the member 42, it is possible to improve aesthetics, prevent noise, emit uniform cold heat from the entire surface, and use the light widely as a light reflecting surface. And since the discharge part 70b is distribute | arranged to the approximate center between the rib 28d which comprises the side wall of the center channel | path 28a, and the side wall of the refrigerator compartment 11, temperature variation is reduced and more uniform cooling can be performed. The member 42 may be a cold storage member as shown in FIG.

  When the blower 29 shown in FIG. 3 is provided in the central passage 28a of the present embodiment, the cold air in the refrigerator compartment 11 and the cold air passing through the central passage 28a are mixed, and the same effect as in the first embodiment can be obtained. it can.

  Since the temperature detecting means 75 and the shielding rib 70f are provided above the discharge portion 70b around the member 42, the member 42 can be provided in a wide area without an opening for cold air discharge or temperature detection. The entire surface of the member 42 is useful for releasing uniform cold heat, the inside temperature is uniform, and the light reflecting surface can be used in a wide range. Further, with respect to the temperature detecting means 75, the temperature of the member 42 can be reduced. This makes it possible to detect the temperature inside the cabinet accurately, and to obtain a refrigerator that can keep the inside of the cabinet at a more appropriate temperature.

  Further, since the temperature detecting means 75 has the left-right direction as the longitudinal direction, the area of the temperature detecting means 75 in the vertical direction can be reduced, and the area where the discharge port is located can be widened. 70b is provided, and the inside temperature is made uniform, and the upper wall surface portion communicating with the opening portion 70a of the discharge portion 70b is slightly inclined so as to become lower toward the discharge portion 70b side. Accordingly, the discharged cool air flows downward, and further, the influence of the cool air on the temperature detecting means 75 provided above is eliminated, and the inside of the cabinet can be kept at a more appropriate temperature.

  The first and second embodiments are embodiments in which the cold air passage 28 is divided into three parts, that is, the central passage 28a and the two side passages 28b, but the cold air passage 28 is divided into four or more branch passages. The same effect can be obtained even when a heat insulating material is provided at an appropriate position according to the amount of cold air supplied. For example, the cold air passage 28 is divided into five parts, and a heat insulating member is provided in the same manner as described above in addition to the central part. And you may make it cool air which goes up through the channel | path of the center side among 2 channel | paths of right and left to descend | fall through the channel | path outside, and to discharge in the refrigerator compartment 11. FIG.

  Further, the ice greenhouse 14 may be an isolation room (for example: partial room = −3 ° C., vegetable room = 3 ° C.) in another temperature zone by adjusting the amount of cold air.

  In the present invention, when a part of the cold due to the cold air passing through the cold air passage is released into the storage chamber through the member, a part of the cold air passing through the cold air passage absorbs heat from the member to cool the member, It means that the member absorbs heat from the storage chamber and cools the storage chamber.

  Further, in the above, the left-right direction means the left-right direction when the refrigerator is viewed from the front, and the front-rear direction means the front-rear direction when the refrigerator is viewed from the front.

It is side surface sectional drawing of the refrigerator of 1st Embodiment of this invention. It is a front view of the refrigerator compartment of the refrigerator of 1st Embodiment of this invention. It is a principal part detail drawing of the refrigerator of 1st Embodiment of this invention. It is an upper surface sectional view of the refrigerator of a 1st embodiment of the present invention. It is a perspective view which shows the member of the refrigerator of 1st Embodiment of this invention. It is a perspective view which shows the other member of the refrigerator of 1st Embodiment of this invention. It is principal part sectional drawing of the member of the refrigerator of 1st Embodiment of this invention. It is principal part sectional drawing of the member of the refrigerator of 1st Embodiment of this invention. It is side surface sectional drawing of the refrigerator of 2nd Embodiment of this invention. It is a front view of the refrigerator compartment of the refrigerator of 2nd Embodiment of this invention.

Explanation of symbols

11 Refrigerated room (storage room)
21, 25 Cooler 23, 27, 28, 30 Cold air passage 42 Member 45 Shelf 70b Discharge part (discharge port)
75 Temperature detection means

Claims (4)

  A storage chamber for storing the storage; a cooler for generating cool air flowing into the storage chamber; a cool air passage extending to the back of the storage chamber and through which cool air from the cooler flows; and a back side of the storage chamber A heat release member provided on the back side of the storage chamber on the side where the cool air from the cooler flows into the cold air passage, and a member disposed around the member. A discharge port for discharging the cold air flowing through the cold air passage to the storage chamber; and a temperature detection means for detecting the temperature of the storage chamber arranged at a position different from the discharge port around the member. Features a refrigerator.   The refrigerator according to claim 1, wherein the discharge port is arranged on a side of the member.   The refrigerator according to claim 1, wherein the discharge port is disposed above the member.   4. A return port for returning cool air to the cooler is provided in the storage chamber, and the temperature detecting means is arranged between the return port and the discharge port. The refrigerator described.

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