JP2020070944A - refrigerator - Google Patents

Abstract

To restrain frost formation on a cooler by restraining entry of humidity from outside air when a door is closed, and restrain a decrease in cooling efficiency caused by defrosting while securing cooling capacity.SOLUTION: A refrigerator comprises a discharge air passage for discharging cool air of a cooling fan 15 to a storage chamber 31, and a return air passage 46 for returning the cool air having cooled the storage chamber 31 to a cooler 14, and also comprises pressure adjustment means 45 for ensuring that a pressure in the storage chamber 31 is equal to or higher than a pressure outside the refrigerator when a door 34 is closed.SELECTED DRAWING: Figure 3

Description

本発明は冷蔵庫の冷却器への着霜抑制に関するものである。   The present invention relates to suppression of frost formation on a cooler of a refrigerator.

従来の冷蔵庫としては、扉が開いた時に庫外への冷気の漏れを防ぐために、扉近傍にエアカーテン機能を備えたものがある（例えば、特許文献１参照）。   Some conventional refrigerators have an air curtain function in the vicinity of the door in order to prevent leakage of cold air to the outside of the refrigerator when the door is opened (see, for example, Patent Document 1).

図５は、従来の冷蔵庫を示す断面図である。図６は、従来の冷蔵庫の冷蔵室の縦断面図である。図７は、従来の冷蔵庫の運転中の圧力変化を表す図である。   FIG. 5: is sectional drawing which shows the conventional refrigerator. FIG. 6 is a vertical sectional view of a refrigerating compartment of a conventional refrigerator. FIG. 7: is a figure showing the pressure change during operation of the conventional refrigerator.

図５及び図６に示すように、従来の冷蔵庫１は、前面を開口した断熱箱体２から構成されている。断熱箱体２は、上仕切部材３、中仕切り４及び下仕切部材５により上下４室に仕切られており、上仕切部材３の上方を、室内を約４度の冷蔵温度帯に維持した冷蔵室６、上仕切部材３と中仕切り４の間を、室内を約−１８度の冷凍温度帯に維持した第一冷凍室７、中仕切り４と下仕切部材５の間を、室内を約−１８度の冷凍温度帯に維持した第二冷凍室８、下仕切部材５の下方を、室内を冷蔵室より若干高い温度帯に維持した野菜室９としている。   As shown in FIGS. 5 and 6, the conventional refrigerator 1 is composed of a heat insulating box 2 having a front opening. The heat-insulating box 2 is partitioned into upper and lower four chambers by an upper partition member 3, a middle partition 4 and a lower partition member 5, and the refrigerating chamber in which the room above the upper partition member 3 is maintained at a refrigerating temperature range of about 4 degrees. Chamber 6, between the upper partition member 3 and the middle partition 4, the first freezing chamber 7, which maintains the inside of the room in a refrigeration temperature range of about -18 degrees, and between the middle partition 4 and the lower partition member 5, the inside of the room- Below the second freezing chamber 8 and the lower partitioning member 5 which are maintained in the freezing temperature range of 18 degrees, there is a vegetable chamber 9 in which the room is maintained in a slightly higher temperature range than the refrigerating room.

そして冷蔵室６の前面開口部は回動自在の断熱扉１０によって、第一冷凍室７、第二冷凍室８及び野菜室９は引き出し式の断熱扉１１、１２、１３によってそれぞれ開閉自在に閉塞されている。   The front opening of the refrigerating compartment 6 is closed by a rotatable heat insulating door 10, and the first freezing compartment 7, the second freezing compartment 8 and the vegetable compartment 9 are closed by openable heat insulating doors 11, 12, 13 respectively. Has been done.

また第一冷凍室７と第二冷凍室８の背面には、下部に図示しない冷却システムの一部である冷却器１４と、上部に冷却器１４で生成した冷気を冷蔵庫１内に循環させる冷却ファン１５を備えており、冷凍室ダクト１６により第一冷凍室７及び第二冷凍室８と仕切られた冷却室１７を形成していると共に、冷凍室ダクト１６下部には冷凍室吸込口（図示せず）が、上部には冷凍室吐出口１８が形成されている。   Further, on the back surfaces of the first freezing compartment 7 and the second freezing compartment 8, a cooler 14 that is a part of a cooling system (not shown) is provided at the bottom, and a cool air generated by the cooler 14 is circulated at the top in the refrigerator 1. The cooling chamber 17 is provided with a fan 15 and is partitioned from the first freezing chamber 7 and the second freezing chamber 8 by the freezing chamber duct 16, and the freezing chamber suction port (see FIG. Although not shown), a freezer outlet 18 is formed in the upper part.

さらに冷凍室ダクト１６背面の冷却ファン１５上方には、冷却ファン１５の冷気を各室に選択的に流すことができるダンパ１９を備えている。このダンパ１９には図示しない冷蔵室バッフル、野菜室バッフルが開閉自在に取り付けられており、それぞれ冷蔵室バッフルには冷蔵室６に冷却風を導く冷蔵室吐出風路２０が、野菜室バッフルにはそれぞれ冷却風を第一冷凍室７及び野菜室９に導く、図示しない野菜室吐出風路が形成されている。   Further, above the cooling fan 15 on the rear surface of the freezer compartment duct 16, there is provided a damper 19 capable of selectively flowing the cool air of the cooling fan 15 into each chamber. A refrigerating compartment baffle and a vegetable compartment baffle (not shown) are openably and closably attached to the damper 19. The refrigerating compartment baffle has a refrigerating compartment discharge air passage 20 for guiding cooling air to the refrigerating compartment 6 and the vegetable compartment baffle. A vegetable compartment discharge air passage (not shown) that guides cooling air to the first freezing compartment 7 and the vegetable compartment 9 is formed.

冷蔵室７の背面略中央には上下に延在する冷蔵室ダクト２１が形成されている。そして冷蔵室ダクト２１左右及び前面には、複数の図示しない冷蔵室吐出口が形成されている。また、冷蔵室６背面の冷蔵室ダクト２１の右下隅部には、冷蔵室吸込口２２が形成されており、図示しない冷蔵室吸込風路と連通しており、冷蔵室吐出口から吐出され冷蔵室６を冷却した冷却風は、冷蔵室吸込風路から冷却室１７に戻される。   A refrigerating compartment duct 21 that extends vertically is formed in the center of the rear surface of the refrigerating compartment 7. A plurality of refrigerating compartment discharge ports (not shown) are formed on the left and right sides and front surface of the refrigerating compartment duct 21. Further, a refrigerating compartment suction port 22 is formed in the lower right corner of the refrigerating compartment duct 21 on the back of the refrigerating compartment 6 and communicates with a refrigerating compartment suction air passage (not shown) and is discharged from the refrigerating compartment discharge port. The cooling air that has cooled the chamber 6 is returned to the cooling chamber 17 from the cooling chamber suction air passage.

野菜室９には野菜室吐出風路を流れてきた冷却風を野菜室９内に吐出する図示しない野菜室吐出口及び野菜室９を冷却した冷却風を冷却室１７に戻す図示しない野菜室吸込風路を備えている。   In the vegetable compartment 9, the cooling air flowing through the vegetable compartment discharge air passage is discharged into the vegetable compartment 9 and the vegetable compartment discharge port (not shown) and the cooling air that has cooled the vegetable compartment 9 are returned to the cooling chamber 17 Equipped with a wind path.

ここで、冷蔵室ダクト２１の中央部には上下に渡ってエアカーテン用背面ダクト２３が形成されており、エアカーテン用背面ダクト２３の最下部には冷蔵室吐出風路２０を流れてきた冷気をエアカーテン用背面ダクト２３に流すエアカーテン用ファン２４を備えている。また、冷蔵室６天面には前後に渡ってエアカーテン用天面ダクト２５を備えており、背面をエアカーテン用背面ダクトの上端に連通していると共に、前面を冷蔵室６の前面開口部近傍に開口している。   Here, a rear duct 23 for the air curtain is formed vertically in the center of the refrigerating compartment duct 21, and the cool air flowing through the refrigerating compartment discharge air passage 20 is formed at the lowermost part of the rear duct 23 for the air curtain. An air curtain fan 24 is provided for flowing the air into the air duct rear duct 23. Further, the top surface of the refrigerating compartment 6 is provided with a front surface duct 25 for the air curtain in the front and rear, the rear surface communicates with the upper end of the rear duct for the air curtain, and the front surface is the front opening of the refrigerating compartment 6. It opens in the vicinity.

また上仕切部材３の上面には前後に渡ってエアカーテン用底面ダクト２６を備えており、前面を冷蔵室６の前面開口部近傍に開口していると共に、背面をエアカーテン用背面ダクトの下端と連通している。   Further, a bottom duct 26 for the air curtain is provided on the upper surface of the upper partition member 3 in the front-rear direction, the front surface is opened in the vicinity of the front opening of the refrigerating chamber 6, and the rear surface is the lower end of the rear duct for the air curtain. Is in communication with.

以上の構成において、冷却システムが運転すると、冷却器１４で生成された冷気は、冷却ファン１５により上方に吐出され、冷凍室吐出口１８より第二冷凍室１８内に吐出され、第二冷凍室８内を冷却し、冷凍室が所定の温度に維持される。   In the above configuration, when the cooling system operates, the cool air generated in the cooler 14 is discharged upward by the cooling fan 15 and discharged into the second freezing chamber 18 from the freezing chamber discharge port 18, and the second freezing chamber is discharged. The inside of 8 is cooled and the freezer compartment is maintained at a predetermined temperature.

その際に、図示しない冷蔵室センサによって、冷蔵室６が所定の温度以上となった時には、冷蔵室バッフルが開き、冷気を冷蔵室６内に循環させ、冷蔵室６内を冷却する。そして、冷蔵室６が所定の温度以下になった時に、冷蔵室バッフルを閉じることにより、冷蔵室６の冷却を停止し、冷蔵室が所定の温度に維持される。同様の動作により、野菜室９も所定の温度に維持される。   At this time, when the refrigerating compartment 6 has a predetermined temperature or higher by a refrigerating compartment sensor (not shown), the refrigerating compartment baffle is opened, and cold air is circulated in the refrigerating compartment 6 to cool the refrigerating compartment 6. Then, when the temperature of the refrigerating compartment 6 becomes equal to or lower than a predetermined temperature, the refrigerating compartment baffle is closed to stop the cooling of the refrigerating compartment 6 and maintain the refrigerating compartment at a predetermined temperature. By the same operation, the vegetable compartment 9 is also maintained at a predetermined temperature.

ここで、冷蔵室６の断熱扉１０か開放されると、エアカーテン用ファン２４が運転される。エアカーテン用ファン２４が運転されると、冷蔵室６内の冷気は、エアカーテン用底面ダクト２６前面から吸い込まれ、エアカーテン用背面ダクト２３及びエアカーテン用天面ダクト２５を流れ、エアカーテン用天面ダクト２５の前面より吐出され、冷蔵室６の開口部を上から下に流れ、再度エアカーテン用底面ダクト２６前面から吸い込まれる。   Here, when the heat insulation door 10 of the refrigerating compartment 6 is opened, the air curtain fan 24 is operated. When the air curtain fan 24 is operated, cool air in the refrigerating chamber 6 is sucked from the front surface of the air curtain bottom duct 26, flows through the air curtain rear duct 23 and the air curtain top duct 25, and is used for the air curtain. It is discharged from the front surface of the ceiling duct 25, flows through the opening of the refrigerating chamber 6 from top to bottom, and is sucked again from the front surface of the air curtain bottom duct 26.

これによって、冷蔵室６の前面には冷気のエアカーテンが形成されるので、冷蔵室６の断熱扉１０を開いている状態でも、冷蔵室６内の冷気は庫外に漏洩することが無く、庫外の空気も冷蔵室６内に侵入することは無い。   As a result, an air curtain of cold air is formed on the front surface of the refrigerating compartment 6, so that even when the heat insulating door 10 of the refrigerating compartment 6 is opened, the cool air in the refrigerating compartment 6 does not leak to the outside of the refrigerator. The air outside the refrigerator does not enter the refrigerator compartment 6.

これにより、断熱扉１０を開いている状態で、庫外の湿度が冷蔵室６内に侵入することを抑制でき、冷却器が湿度の高いと熱交換することにより発生する着霜を抑制することができる。   Thereby, with the heat insulation door 10 opened, it is possible to suppress the humidity outside the refrigerator from entering the refrigerating chamber 6, and suppress the frost formation caused by heat exchange when the cooler has high humidity. You can

特開２０００−１０５０５２号公報JP, 2000-105052, A

しかしながら、上記従来の構成は、断熱扉１０が開いている時の庫外の湿度侵入は抑制できるが、断熱扉１０が閉じている時にはエアカーテン効果は無く、冷却ファン１５が運転している状態で冷蔵室バッフルが閉じていると、冷却ファン１５が冷蔵室吸込風路から冷気を吸い込もうとするため、冷蔵室６内が外気に比べて圧力が低くなり（静圧がマイナスの値となり）、断熱扉１０と断熱箱体２の隙間から冷蔵室６内に高温高湿の外気を吸い込んでしまうという課題があった。   However, the above-described conventional configuration can suppress the humidity invasion outside the refrigerator when the heat insulating door 10 is opened, but when the heat insulating door 10 is closed, there is no air curtain effect and the cooling fan 15 is operating. When the refrigerating compartment baffle is closed, the cooling fan 15 tries to suck the cool air from the refrigerating compartment suction air passage, so that the pressure inside the refrigerating compartment 6 becomes lower than the outside air (the static pressure becomes a negative value), There is a problem that high-temperature and high-humidity outside air is sucked into the refrigerating chamber 6 through the gap between the heat insulating door 10 and the heat insulating box 2.

また、野菜室９においても同様に、断熱扉１３が閉じている時に、冷却ファン１５が運転している状態で野菜室バッフルが閉じていると、冷却ファン１５が野菜室吸込風路から冷気を吸い込もうとするため、野菜室９内が外気に比べて圧力が低くなり（静圧がマイナスの値となり）、断熱扉１３と断熱箱体の隙間から野菜室９内に高温高湿の外気を吸い込んでしまうという課題があった。   Similarly, in the vegetable compartment 9, if the vegetable compartment baffle is closed while the cooling fan 15 is operating when the heat insulating door 13 is closed, the cooling fan 15 cools the vegetable compartment suction air passage. Since it tries to suck, the pressure in the vegetable compartment 9 becomes lower than the outside air (the static pressure becomes a negative value), and the outside air of high temperature and high humidity is sucked into the vegetable compartment 9 through the gap between the heat insulating door 13 and the heat insulating box. There was a problem of getting out.

本発明は、上記従来の課題を解決するものであり、断熱扉が閉じている時に庫内の圧力を外気と同等にすることにより、庫外の湿度の庫内への侵入を抑制することができる。   The present invention is to solve the above-described conventional problems, and by making the pressure inside the refrigerator equal to the outside air when the heat insulating door is closed, it is possible to suppress the entry of humidity outside the refrigerator into the refrigerator. it can.

上記従来の課題を解決するために、本発明の冷蔵庫は、冷却器と、前面に開口した複数の貯蔵室を備えた断熱箱体と、冷却器で生成した冷気を複数の貯蔵室に流す冷却ファンと、冷却ファンの冷気を各貯蔵室に吐出する吐出風路と、各貯蔵室を冷却した冷気を冷却器に戻す戻り風路と、貯蔵室を閉塞する複数の扉を備えた冷蔵庫において、扉が閉じている時に貯蔵室内の圧力を冷蔵庫外の圧力と同等またはそれ以上にする圧力調整手段とから構成したものである。   In order to solve the above-mentioned conventional problems, the refrigerator of the present invention includes a cooler, an insulating box body having a plurality of storage chambers opened to the front, and a cooling air flow generated by the cooler to the plurality of storage chambers. In a refrigerator provided with a fan, a discharge air passage for discharging the cool air of the cooling fan to each storage chamber, a return air passage for returning the cool air that has cooled each storage chamber to the cooler, and a plurality of doors for closing the storage chamber, The pressure adjusting means makes the pressure inside the storage chamber equal to or higher than the pressure outside the refrigerator when the door is closed.

これによって、貯蔵室内と外気の圧力差により、貯蔵室内に高温高湿の外気が侵入することを防止でき、冷却器への着霜を抑制することで、除霜電力を削減することができる。   With this, it is possible to prevent the high-temperature and high-humidity outside air from entering the storage chamber due to the pressure difference between the storage chamber and the outside air, and it is possible to reduce the defrosting power by suppressing the frost formation on the cooler.

本発明の冷蔵庫は、上記構成により、冷却器への着霜を抑制することができ、消費電力量を低減することができる。   With the above configuration, the refrigerator of the present invention can suppress frost formation on the cooler and reduce power consumption.

本発明の実施の形態１の冷蔵庫の冷凍室ダクトを除く正面図The front view except the freezer compartment duct of the refrigerator of Embodiment 1 of the present invention 実施の形態１の冷蔵庫の運転中の庫内の圧力変化を表す図The figure showing the pressure change in the refrigerator during operation of the refrigerator of Embodiment 1. 本発明の実施の形態２の冷蔵庫の縦断面図Vertical sectional view of a refrigerator according to a second embodiment of the present invention 実施の形態２の冷蔵庫の運転中の庫内の圧力変化を表す図The figure showing the pressure change in the refrigerator during operation of the refrigerator of Embodiment 2. 従来の冷蔵庫の断面図Cross section of conventional refrigerator 従来の冷蔵庫の冷蔵室の縦断面図Longitudinal sectional view of the refrigerator compartment of a conventional refrigerator 従来の冷蔵庫の運転中の圧力変化を表す図Diagram showing pressure change during operation of conventional refrigerator

請求項１に記載の発明は、冷却器と、前面に開口した複数の貯蔵室を備えた断熱箱体と、冷却器で生成した冷気を複数の貯蔵室に流す冷却ファンと、冷却ファンの冷気を各貯蔵室に吐出する吐出風路と、各貯蔵室を冷却した冷気を冷却器に戻す戻り風路と、貯蔵室を閉塞する複数の扉を備えた冷蔵庫において、扉が閉じている時に貯蔵室内の圧力を冷蔵庫外の圧力と同等またはそれ以上にする圧力調整手段を備えた構成としたので、高温高湿の外気が貯蔵室内へ侵入することを防止でき、冷却器への着霜を抑制できる。   The invention according to claim 1 is a cooler, an insulating box body provided with a plurality of storage chambers opened to the front, a cooling fan for flowing the cool air generated by the cooler to the plurality of storage chambers, and a cool air of the cooling fan. In a refrigerator equipped with a discharge air passage for discharging each of the storage chambers, a return air passage for returning the cool air that has cooled each storage chamber to the cooler, and a plurality of doors that close the storage chambers, the storage is performed when the doors are closed. Since it is equipped with a pressure adjusting means that makes the pressure inside the refrigerator equal to or higher than the pressure outside the refrigerator, it is possible to prevent outside air with high temperature and high humidity from entering the storage chamber and suppress frost formation on the cooler. it can.

請求項２に記載の発明は、圧力調整手段は、貯蔵室を循環した冷気が冷却室へ戻る戻り風路に備えられ、前記戻り風路内の冷気量を調節する吸込みダンパであるので、簡単な構成で高温高湿の外気が貯蔵室内へ侵入することを防止でき、冷却器への着霜を抑制できる。   In the invention according to claim 2, the pressure adjusting means is a suction damper provided in a return air passage for returning the cool air circulating in the storage chamber to the cooling chamber, and is a suction damper for adjusting the amount of cool air in the return air passage. With such a configuration, it is possible to prevent outside air of high temperature and high humidity from entering the storage chamber, and suppress frost formation on the cooler.

請求項３に記載の発明は、圧力調整手段は、複数の貯蔵室の間の仕切部材に設け、貯蔵室へ吐出する冷気量を調節する吐出ダンパであるので、高温高湿の外気が全ての貯蔵室内へ侵入することを防止でき、冷却器への着霜を抑制できる。   In the invention according to claim 3, the pressure adjusting means is a discharge damper that is provided in the partition member between the plurality of storage chambers and adjusts the amount of cool air discharged to the storage chambers. It is possible to prevent it from entering the storage chamber and suppress frost formation on the cooler.

請求項４に記載の発明は、前記冷却ファンが運転中で前記貯蔵室の前記吐出ダンパが閉塞した場合、前記貯蔵室の前記吸込みダンパも閉塞する構成としたので、簡単な構成で、高温高湿の外気が貯蔵室内へ侵入することを防止でき、冷却器への着霜を抑制できる。   In the invention according to claim 4, when the cooling fan is in operation and the discharge damper of the storage chamber is closed, the suction damper of the storage chamber is also closed. It is possible to prevent humid outside air from entering the storage chamber, and to prevent frost formation on the cooler.

請求項５に記載の発明は、前記冷却ファンが運転中で、前記貯蔵室が適温となった場合に、前記貯蔵室の前記吐出ダンパを半開状態で維持する構成としたので、吸込みダンパがない場合でも、外気が貯蔵室内へ侵入することを防止できる。   In the invention according to claim 5, since the discharge damper of the storage chamber is maintained in a half-opened state when the cooling fan is in operation and the storage chamber reaches an appropriate temperature, there is no suction damper. Even in this case, outside air can be prevented from entering the storage chamber.

（実施の形態１）
図１は、本発明の実施の形態１における冷蔵庫の冷凍室ダクトを除く正面図である。図２は同冷蔵庫の運転中の庫内の圧力変化を表す図である。 (Embodiment 1)
1 is a front view excluding a freezer compartment duct of a refrigerator according to a first embodiment of the present invention. FIG. 2 is a diagram showing a pressure change in the refrigerator during operation of the refrigerator.

図１及び図２において、冷蔵庫２７は、前面を開口した断熱箱体２８から構成されている。断熱箱体２８は、上仕切部材２９及び下仕切部材３０により上下３室に仕切られており、上仕切部材２９の上方を、室内を約４度の冷蔵温度帯に維持した冷蔵室３１、上仕切部材２９と下仕切部材３０の間を、室内を約−１８度の冷凍温度帯に維持した冷凍室３２、下仕切部材３０の下方を、室内を冷蔵室より若干高い温度帯に維持した野菜室３３としている。   1 and 2, the refrigerator 27 is composed of a heat insulating box 28 having a front opening. The heat-insulating box 28 is partitioned into upper and lower three chambers by an upper partition member 29 and a lower partition member 30. Between the partition member 29 and the lower partition member 30, a freezer compartment 32 in which the room is maintained at a refrigeration temperature range of about -18 degrees, and below the lower partition member 30 is a vegetable in which the room is maintained in a temperature zone slightly higher than the refrigeration room. It is set as chamber 33.

そして冷蔵室３１の前面開口部は回動自在の断熱扉３４によって、冷凍室３２及び野菜室３３は引き出し式の断熱扉３５及び３６によってそれぞれ開閉自在に閉塞されている。   The front opening of the refrigerating compartment 31 is closed by a rotatable heat insulating door 34, and the freezing compartment 32 and the vegetable compartment 33 are closed by openable heat insulating doors 35 and 36, respectively.

また冷凍室３２の背面には、下部に図示しない冷却システムの一部である冷却器１４と、上部に冷却器１４で生成した冷気を冷蔵庫２７内に循環させる冷却ファン１５を備えており、冷凍室ダクト（図示せず）により冷凍室３２と仕切られた冷却室３７を形成している。   On the back surface of the freezer compartment 32, a cooler 14 which is a part of a cooling system (not shown) is provided in the lower part, and a cooling fan 15 for circulating the cool air generated by the cooler 14 in the refrigerator 27 is provided in the upper part. A cooling chamber 37 which is partitioned from the freezing chamber 32 is formed by a chamber duct (not shown).

上仕切部材２９には、冷却室３７内の冷却ファン１５の吐出側と冷蔵室３１を選択的に連通、閉塞し、冷気量を調節する冷蔵吐出ダンパ３８を備えていると共に、冷蔵室３１と冷却室３７を選択的に連通、閉塞し、冷気量を調節する冷蔵吸込ダンパ３９を備えており、さらに冷却室３７には冷蔵吸込ダンパ３９から吸い込まれた空気を冷却器１４に導く冷蔵吸込風路４０が形成されている。
The upper partition member 29 is provided with a refrigerating and discharging damper 38 that selectively connects and closes the discharge side of the cooling fan 15 in the cooling chamber 37 and the refrigerating chamber 31 to adjust the amount of cool air, and at the same time as the refrigerating chamber 31. The cooling chamber 37 is provided with a refrigeration suction damper 39 that selectively communicates and blocks the refrigeration chamber 37, and adjusts the amount of cold air. Further, the cooling chamber 37 guides the air sucked from the refrigeration suction damper 39 to the cooler 14. A passage 40 is formed.

同様に、下仕切部材３０内には野菜室３３と冷却室３７内の冷却器下方を選択的に連通、閉塞し冷気量を調節する野菜吸込ダンパ４１と、冷却ファン１５の吐出側と野菜室３３を選択的に連通、閉塞し、冷気量を調節する野菜吐出ダンパ４２を備えており、さらに冷凍室ダクト内には冷却ファン１５の吐出側と野菜吐出ダンパ４２とを連通する野菜吐出風路（図示せず）が形成されている。   Similarly, in the lower partition member 30, the vegetable compartment 33 and the lower portion of the cooler in the cooling compartment 37 are selectively communicated with each other to close and close the vegetable suction damper 41 for adjusting the amount of cool air, the discharge side of the cooling fan 15 and the vegetable compartment. 33 is provided with a vegetable discharge damper 42 that selectively communicates and blocks 33 to regulate the amount of cool air, and further, a vegetable discharge air passage that connects the discharge side of the cooling fan 15 and the vegetable discharge damper 42 in the freezer compartment duct. (Not shown) is formed.

また、冷却器１４の下部には冷却器１４に付着した霜を定期的に融かすために例えばラジアントヒータなどの除霜ヒータ４４を備えている。   Further, a defrosting heater 44 such as a radiant heater is provided below the cooler 14 in order to periodically melt the frost adhering to the cooler 14.

以上のように構成された冷蔵庫について、以下その動作を説明する。   The operation of the refrigerator configured as described above will be described below.

冷蔵庫の通常運転時、図示しない冷却システムの一部である圧縮機（図示せず）が運転することにより冷却器１４を冷却し、冷気を生成する。生成された冷気は、冷却ファン１５から吐出され、冷凍室ダクトにより冷凍室内を冷却すると共に、冷蔵室３１及び野菜室３３を所定の温度に冷却すべく冷蔵吐出ダンパ３８、野菜吐出ダンパ４２のバッフル（図示せず）を開くことにより冷蔵室３１及び野菜室３３へと流れ、各室を冷却する。この時、冷蔵吸込ダンパ３９及び野菜吸込ダンパ４１のバッフルは開いており、冷蔵室３１及び野菜室３３を冷却した空気は再び冷却器１４へと吸い込まれる。   During normal operation of the refrigerator, a compressor (not shown) that is a part of a cooling system (not shown) operates to cool the cooler 14 and generate cool air. The generated cool air is discharged from the cooling fan 15, cools the freezer compartment by the freezer compartment duct, and baffles the refrigerator discharge damper 38 and the vegetable discharge damper 42 to cool the refrigerator compartment 31 and the vegetable compartment 33 to a predetermined temperature. By opening (not shown), it flows into the refrigerator compartment 31 and the vegetable compartment 33, and cools each compartment. At this time, the baffles of the refrigerating suction damper 39 and the vegetable suction damper 41 are open, and the air that has cooled the refrigerating compartment 31 and the vegetable compartment 33 is sucked into the cooler 14 again.

そして、冷蔵室３１が所定の温度まで低下すると、冷蔵吐出ダンパ３８と冷蔵吸込ダンパ３９が同時に閉塞し、冷蔵室３１の冷却を停止する。   Then, when the temperature of the refrigerating chamber 31 is lowered to a predetermined temperature, the refrigerating discharge damper 38 and the refrigerating suction damper 39 are simultaneously closed, and the cooling of the refrigerating chamber 31 is stopped.

同様に、野菜室３３が所定の温度まで低下すると、野菜吐出ダンパ４２と野菜吸込ダンパ４１が同時に閉塞し、野菜室３３の冷却を停止する。   Similarly, when the temperature of the vegetable compartment 33 drops to a predetermined temperature, the vegetable discharge damper 42 and the vegetable suction damper 41 simultaneously close, and the cooling of the vegetable compartment 33 is stopped.

さらに、冷凍室３２が所定の温度まで低下すると、圧縮機及び冷却ファン１５を停止させ、冷却運転を停止する。   Further, when the freezing room 32 has dropped to a predetermined temperature, the compressor and the cooling fan 15 are stopped and the cooling operation is stopped.

また、冷蔵庫が長時間運転すると、扉開閉などにより外部から侵入した湿度が冷却器１４に霜として付着する。この霜が増加していくと、冷却ファン１５の通風抵抗となり、冷却性能が低下するため、定期的に除霜ヒータ４４を運転させて霜を融かす除霜運転を設けている。   Further, when the refrigerator is operated for a long time, the humidity that has entered from the outside due to the opening and closing of the door or the like adheres to the cooler 14 as frost. As this frost increases, it becomes ventilation resistance of the cooling fan 15 and the cooling performance deteriorates. Therefore, the defrosting operation is performed by periodically operating the defrosting heater 44 to melt the frost.

従来の冷蔵庫では、冷蔵吸込ダンパ３９及び野菜吸込ダンパ４１を備えていないため、冷却ファン１５が冷蔵室３１及び野菜室３３から空気を吸い込もうとすることで、冷蔵室３１及び野菜室３３内の圧力が低下し、外気との圧力差である静圧がマイナスの値となり、扉開閉が無くても高温高湿の外気を室内に吸い込んでしまう。   Since the conventional refrigerator does not include the refrigerating suction damper 39 and the vegetable sucking damper 41, the cooling fan 15 tries to suck air from the refrigerating compartment 31 and the vegetable compartment 33, so that the pressure inside the refrigerating compartment 31 and the vegetable compartment 33 is reduced. And the static pressure, which is the pressure difference from the outside air, becomes a negative value, and the outside air of high temperature and high humidity is sucked into the room without opening and closing the door.

しかしながら、本発明の冷蔵庫２７は、冷蔵吸込ダンパ３９及び野菜吸込ダンパ４１を備えており、冷蔵室３１または野菜室３３を冷却しない時には冷蔵吸込ダンパ３９または野菜吸込ダンパ４１を閉塞するため、冷蔵室３１、野菜室３３の圧力が低下して静圧がマイナスの値になることは無く、外気を室内に吸い込むことは無い。   However, the refrigerator 27 of the present invention includes the refrigeration suction damper 39 and the vegetable suction damper 41, and closes the refrigeration suction damper 39 or the vegetable suction damper 41 when the refrigeration chamber 31 or the vegetable compartment 33 is not cooled. 31, the static pressure does not become a negative value due to the pressure drop in the vegetable compartment 33, and the outside air is not sucked into the room.

これにより、冷却器１４に付着する霜の量を低減することができ、除霜運転時間を短縮することができる。   Thereby, the amount of frost adhering to the cooler 14 can be reduced, and the defrosting operation time can be shortened.

従って、除霜電力を削減し、消費電力量の低い冷蔵庫とすることができる。   Therefore, the defrosting power can be reduced and the refrigerator can consume less power.

（実施の形態２）
図３は、本発明の実施の形態２における冷蔵庫の縦断面図である。図４は、同冷蔵庫の運転中の庫内の圧力変化を表す図である
図３及び図４において、冷蔵庫２７は、前面を開口した断熱箱体２８から構成されている。断熱箱体２８は、上仕切部材２９及び下仕切部材３０により上下３室に仕切られており、上仕切部材２９の上方を、室内を約４度の冷蔵温度帯に維持した冷蔵室３１、上仕切部材２９と下仕切部材３０の間を、室内を約−１８度の冷凍温度帯に維持した冷凍室３２、下仕切部材３０の下方を、室内を冷蔵室より若干高い温度帯に維持した野菜室３３としている。 (Embodiment 2)
FIG. 3 is a vertical cross-sectional view of the refrigerator according to the second embodiment of the present invention. FIG. 4 is a diagram showing a pressure change in the refrigerator during operation of the refrigerator. In FIGS. 3 and 4, the refrigerator 27 is composed of a heat insulating box 28 having a front opening. The heat-insulating box 28 is partitioned into upper and lower three chambers by an upper partition member 29 and a lower partition member 30, and an upper part of the upper partition member 29 is a refrigerating room 31 in which the room is maintained in a refrigerating temperature zone of about 4 degrees. Between the partition member 29 and the lower partition member 30, a freezer compartment 32 in which the room is maintained at a refrigeration temperature range of about -18 degrees, and below the lower partition member 30 is a vegetable in which the room is maintained in a temperature zone slightly higher than the refrigeration room. It is set as chamber 33.

そして冷蔵室３１の前面開口部は回動自在の断熱扉３４によって、冷凍室３２及び野菜室３３は引き出し式の断熱扉３５及び３６によってそれぞれ開閉自在に閉塞されている。   The front opening of the refrigerating compartment 31 is closed by a rotatable heat insulating door 34, and the freezing compartment 32 and the vegetable compartment 33 are closed by openable heat insulating doors 35 and 36, respectively.

また冷凍室３２の背面には、下部に図示しない冷却システムの一部である冷却器１４と、上部に冷却器１４で生成した冷気を冷蔵庫２７内に循環させる冷却ファン１５を備えており、冷凍室ダクト（図示せず）により冷凍室３２と仕切られた冷却室３７を形成している。   On the back surface of the freezer compartment 32, a cooler 14 which is a part of a cooling system (not shown) is provided in the lower part, and a cooling fan 15 for circulating the cool air generated by the cooler 14 in the refrigerator 27 is provided in the upper part. A cooling chamber 37 which is partitioned from the freezing chamber 32 is formed by a chamber duct (not shown).

上仕切部材２９には、冷却室３７内の冷却ファン１５の吐出側と冷蔵室３１を選択的に連通、閉塞する冷蔵吐出ダンパ４５を備えていると共に、冷蔵室３１と冷却室３７を連通する冷蔵吸込口４６を備えており、さらに冷却室３７には冷蔵吸込口４６から吸い込まれた空気を冷却器１４に導く冷蔵吸込風路４０が形成されている。   The upper partition member 29 is provided with a refrigeration discharge damper 45 that selectively connects and closes the discharge side of the cooling fan 15 in the cooling chamber 37 and the refrigerating chamber 31, and also connects the refrigerating chamber 31 and the cooling chamber 37. The cooling chamber 37 is provided with a refrigerating suction port 46, and a refrigerating suction air passage 40 for guiding the air sucked from the refrigerating suction port 46 to the cooler 14 is formed in the cooling chamber 37.

同様に、下仕切部材３０内には野菜室３３と冷却室３７内の冷却器下方を連通する野菜吸込口４７と、冷却ファン１５の吐出側と野菜室３３を選択的に連通、閉塞する野菜吐出ダンパ４８を備えており、さらに冷凍室ダクト内には冷却ファン１５の吐出側と野菜吐出ダンパ４８とを連通する野菜吐出風路（図示せず）が形成されている。   Similarly, in the lower partition member 30, a vegetable suction port 47 that communicates the vegetable compartment 33 and the lower side of the cooler in the cooling chamber 37, and a vegetable that selectively communicates and closes the discharge side of the cooling fan 15 and the vegetable compartment 33. A discharge damper 48 is provided, and a vegetable discharge air passage (not shown) that connects the discharge side of the cooling fan 15 and the vegetable discharge damper 48 is formed in the freezer compartment duct.

また、冷却器１４の下部には冷却器１４に付着した霜を定期的に融かすために例えばラジアントヒータなどの除霜ヒータ４４を備えている。   Further, a defrosting heater 44 such as a radiant heater is provided below the cooler 14 in order to periodically melt the frost adhering to the cooler 14.

以上のように構成された冷蔵庫について、以下その動作を説明する。   The operation of the refrigerator configured as described above will be described below.

冷蔵庫の通常運転時、図示しない冷却システムの一部である圧縮機（図示せず）が運転することにより冷却器１４を冷却し、冷気を生成する。生成された冷気は、冷却ファン１５から吐出され、冷凍室ダクトにより冷凍室内を冷却すると共に、冷蔵室３１及び野菜室３３を所定の温度に冷却すべく冷蔵吐出ダンパ４５、野菜吐出ダンパ４８のバッフル（図示せず）を開くことにより冷蔵室３１及び野菜室３３へと流れ、各室を冷却する。この時、冷蔵室３１及び野菜室３３を冷却した空気は冷蔵吸込口４６及び野菜吸込口４７から再び冷却器１４へと吸い込まれる。   During normal operation of the refrigerator, a compressor (not shown) that is a part of a cooling system (not shown) operates to cool the cooler 14 and generate cool air. The generated cool air is discharged from the cooling fan 15, cools the freezer compartment by the freezer compartment duct, and baffles the refrigerator discharge damper 45 and the vegetable discharge damper 48 to cool the refrigerator compartment 31 and the vegetable compartment 33 to a predetermined temperature. By opening (not shown), it flows into the refrigerator compartment 31 and the vegetable compartment 33, and cools each compartment. At this time, the air that has cooled the refrigerator compartment 31 and the vegetable compartment 33 is again sucked into the cooler 14 through the refrigerator inlet 46 and the vegetable inlet 47.

そして、冷蔵室３１が所定の温度まで低下すると、冷蔵吐出ダンパ４５のバッフルを半開状態とし、冷蔵室３１の冷却を停止する。   Then, when the temperature of the refrigerating chamber 31 is lowered to a predetermined temperature, the baffle of the refrigerating and discharging damper 45 is opened halfway, and the cooling of the refrigerating chamber 31 is stopped.

同様に、野菜室３３が所定の温度まで低下すると、野菜吐出ダンパ４７のバッフルを半開状態とし、野菜室３３の冷却を停止する。   Similarly, when the temperature of the vegetable compartment 33 drops to a predetermined temperature, the baffle of the vegetable discharge damper 47 is opened halfway, and the cooling of the vegetable compartment 33 is stopped.

さらに、冷凍室３２が所定の温度まで低下すると、圧縮機及び冷却ファン１５を停止させ、冷却運転を停止する。   Further, when the freezing room 32 has dropped to a predetermined temperature, the compressor and the cooling fan 15 are stopped and the cooling operation is stopped.

また、冷蔵庫が長時間運転すると、扉開閉などにより外部から侵入した湿度が冷却器１４に霜として付着する。この霜が増加していくと、冷却ファン１５の通風抵抗となり、冷却性能が低下するため、定期的に除霜ヒータ４４を運転させて霜を融かす除霜運転を設けている。   Further, when the refrigerator is operated for a long time, the humidity that has entered from the outside due to the opening and closing of the door or the like adheres to the cooler 14 as frost. As this frost increases, it becomes ventilation resistance of the cooling fan 15 and the cooling performance deteriorates. Therefore, the defrosting operation is performed by periodically operating the defrosting heater 44 to melt the frost.

従来の冷蔵庫では、冷凍室３２を冷却中で冷却ファン１５が運転している状態で、冷蔵室３１及び野菜室３３の冷却を停止する際には、冷蔵吐出ダンパ４５及び野菜吐出ダンパ４８を閉塞してしまうため、冷蔵室戻り風路および野菜室戻り風路からそれぞれ冷蔵室３１および野菜室３３内の空気を吸う。冷却ファン１５が冷蔵室３１及び野菜室３３から空気を吸い込もうとすることで、冷蔵室３１及び野菜室３３内の圧力が低下し、外気との圧力差である静圧がマイナスの値となり、扉開閉が無くても高温高湿の外気を室内に吸い込んでしまう。   In the conventional refrigerator, when the cooling of the refrigerating compartment 31 and the vegetable compartment 33 is stopped while the freezing compartment 32 is being cooled and the cooling fan 15 is operating, the refrigerating compartment damper 45 and the vegetable compartment damper 48 are closed. Therefore, the air in the refrigerating compartment 31 and the vegetable compartment 33 is sucked from the refrigerating compartment return air passage and the vegetable compartment return air passage, respectively. When the cooling fan 15 tries to suck air from the refrigerator compartment 31 and the vegetable compartment 33, the pressure inside the refrigerator compartment 31 and the vegetable compartment 33 decreases, and the static pressure, which is the pressure difference from the outside air, becomes a negative value, and the door Even if there is no opening and closing, it will inhale high temperature and high humidity outside air into the room.

しかしながら、冷凍室３２を冷却中で冷却ファン１５が運転している状態で、冷蔵室３１および野菜室３３が適温で冷却を停止する際に、本発明の冷蔵庫２７は、冷蔵吐出ダンパ４５のバッフル及び野菜吐出ダンパ４８のバッフルは図４のように半開状態となって冷却ファン１５から吐出される冷気が冷蔵室３１および野菜室３３にわずかに導入されるように風路が連通するため、冷蔵室３１及び野菜室３３内の圧力は冷蔵吐出ダンパ４５及び野菜吐出ダンパ４８から漏れ出る冷気によって室内が負圧になることは無く、外気を室内に吸い込むことは無い。   However, when the refrigerating compartment 31 and the vegetable compartment 33 stop cooling at an appropriate temperature while the refrigerating compartment 32 is being cooled and the cooling fan 15 is operating, the refrigerator 27 of the present invention uses the baffle of the refrigerating discharge damper 45. The baffle of the vegetable discharge damper 48 is in a half-open state as shown in FIG. 4, and the air passage communicates so that the cool air discharged from the cooling fan 15 is slightly introduced into the refrigerating compartment 31 and the vegetable compartment 33. The pressure in the chamber 31 and the vegetable chamber 33 does not become negative pressure in the chamber due to the cold air leaking from the refrigerating discharge damper 45 and the vegetable discharge damper 48, and the outside air is not sucked into the room.

また、冷蔵吐出ダンパ４５を閉塞した場合、一定時間後に冷蔵吐出ダンパ４５を一時的に開放する動作を所定時間ごとに繰り返し、冷蔵室３１内が負圧になるのを抑制しても良い。   Further, when the refrigerating and discharging damper 45 is closed, the operation of temporarily opening the refrigerating and discharging damper 45 after a certain period of time may be repeated every predetermined time to suppress the negative pressure in the refrigerating chamber 31.

野菜室吐出ダンパ４８も上記と同様に制御してもよい。   The vegetable compartment discharge damper 48 may be controlled in the same manner as above.

これにより、実施の形態１に対して簡単な構成で、冷却器１４に付着する霜の量を低減することができ、除霜運転時間を短縮することができる。   This makes it possible to reduce the amount of frost adhering to the cooler 14 and reduce the defrosting operation time with a simple configuration compared to the first embodiment.

従って、除霜電力を削減し、消費電力量の低い冷蔵庫とすることができる。   Therefore, the defrosting power can be reduced and the refrigerator can consume less power.

尚、本実施の形態において、冷蔵吐出ダンパ４５及び野菜吐出ダンパ４８は半開とするとしたが、バッフルの開度は冷蔵室３１及び野菜室３３の静圧が負圧にならない最小の開度とすることにより、効率よく各室を冷却することができる。   In the present embodiment, the refrigeration discharge damper 45 and the vegetable discharge damper 48 are assumed to be half-open, but the opening of the baffle is set to the minimum opening at which the static pressure of the refrigerating compartment 31 and the vegetable compartment 33 does not become negative pressure. As a result, each chamber can be efficiently cooled.

また、圧力調整手段として、ダンパの開度を閉塞または開度制御するとしたが、例えば冷蔵吸込ダンパ３９の代わりに冷蔵吸込ファンを配置し、冷蔵室３１の冷蔵吐出ダンパ４５を閉塞した場合、冷蔵吸込ファンを運転して、冷蔵室の吸込み冷気が冷蔵室３１へ流れるように冷気を逆流させてもよい。   Further, although the opening of the damper is closed or controlled as the pressure adjusting means, for example, when a refrigeration suction fan is arranged instead of the refrigeration suction damper 39 and the refrigeration discharge damper 45 of the refrigeration chamber 31 is closed, refrigeration is performed. The suction fan may be operated so that the cold air sucked into the refrigerating chamber is allowed to flow back to the refrigerating chamber 31.

本発明は、冷却器への着霜を抑制し、除霜する際のロスを低減することができるので、家庭用および業務用など様々な種類および大きさの間冷式の冷蔵庫に適用することができる。   INDUSTRIAL APPLICABILITY Since the present invention can suppress frost formation on a cooler and reduce loss at the time of defrosting, it can be applied to refrigerators of various types and sizes such as household and commercial types. You can

１４ 冷却器
１５ 冷却ファン
２７ 冷蔵庫
２８ 断熱箱体
３１ 冷蔵室
３２ 冷凍室
３３ 野菜室
３４ 断熱扉
３５ 断熱扉
３６ 断熱扉
３８ 冷蔵吐出ダンパ
３９ 冷蔵吸込ダンパ
４１ 野菜吸込ダンパ
４２ 野菜吐出ダンパ
４５ 冷蔵吐出ダンパ
４６ 冷蔵吸込口
４７ 野菜吸込口
４８ 野菜吐出ダンパ 14 Cooler 15 Cooling Fan 27 Refrigerator 28 Insulation Box 31 Refrigerator 32 Freezer 33 Vegetable Room 34 Insulation Door 35 Insulation Door 36 Insulation Door 38 Refrigeration Discharge Damper 39 Refrigeration Suction Damper 41 Vegetable Suction Damper 42 Vegetable Discharge Damper 45 Refrigeration Discharge Damper 46 Refrigerator Suction Port 47 Vegetable Suction Port 48 Vegetable Discharge Damper

Claims (5)

冷却器と、前面に開口した複数の貯蔵室を備えた断熱箱体と、前記冷却器で生成した冷気を前記複数の貯蔵室に流す冷却ファンと、前記冷却ファンの冷気を各貯蔵室に吐出する吐出風路と、各貯蔵室を冷却した冷気を前記冷却器に戻す戻り風路と、前記貯蔵室を閉塞する複数の扉を備えた冷蔵庫において、扉が閉じている時に貯蔵室内の圧力を冷蔵庫外の圧力と同等またはそれ以上にする圧力調整手段を備えた冷蔵庫。 A cooler, an adiabatic box having a plurality of storage chambers open to the front, a cooling fan for flowing the cool air generated by the cooler to the plurality of storage chambers, and discharging the cool air of the cooling fan to each storage chamber. In the refrigerator provided with a discharge air passage, a return air passage for returning the cool air that has cooled each storage chamber to the cooler, and a plurality of doors that close the storage chamber, the pressure inside the storage chamber when the door is closed. Refrigerator equipped with pressure adjusting means to make the pressure equal to or higher than the pressure outside the refrigerator. 圧力調整手段は、貯蔵室を循環した冷気が冷却室へ戻る戻り風路に備えられ、前記戻り風路内の冷気量を調節する吸込みダンパである請求項１に記載の冷蔵庫。 The refrigerator according to claim 1, wherein the pressure adjusting means is a suction damper that is provided in a return air passage for returning the cool air that has circulated in the storage chamber to the cooling chamber and that adjusts the amount of cool air in the return air passage. 圧力調整手段は、複数の貯蔵室の間の仕切部材に設け、貯蔵室へ吐出する冷気量を調節する吐出ダンパである請求項１または２に記載の冷蔵庫。 The refrigerator according to claim 1 or 2, wherein the pressure adjusting means is a discharge damper that is provided in a partition member between the plurality of storage chambers and that adjusts the amount of cold air discharged to the storage chambers. 前記冷却ファンが運転中で前記貯蔵室の前記吐出ダンパが閉塞した場合、前記貯蔵室の前記吸込みダンパも閉塞することを特徴とする請求項１から３のいずれかに記載の冷蔵庫。 4. The refrigerator according to claim 1, wherein when the cooling fan is operating and the discharge damper of the storage chamber is closed, the suction damper of the storage chamber is also closed. 前記冷却ファンが運転中で、前記貯蔵室が適温となった場合に、前記貯蔵室の前記吐出ダンパを半開状態で維持することを特徴とする請求項１の冷蔵庫。 The refrigerator according to claim 1, wherein the discharge damper of the storage chamber is maintained in a half-open state when the storage fan reaches an appropriate temperature while the cooling fan is in operation.

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