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Disclosed is a refrigerator, comprising: a refrigerator body having a cooling chamber; a case comprising a case body having therein an accommodation space of which one side is open, and a transformation preventing member formed of a material having a higher strength than that of the case body, the t

Disclosed is a refrigerator, comprising: a refrigerator body having a cooling chamber; a case comprising a case body having therein an accommodation space of which one side is open, and a transformation preventing member formed of a material having a higher strength than that of the case body, the transformation preventing member provided at an open region of the case body and configured to prevent transformation of the case; a drawer accommodated in the case in a withdrawable manner; and a depressurizing device configured to depressurize inside of the drawer and the case to a pressure lower than an atmospheric pressure, when the drawer is accommodated in the case. Under such configuration, transformation of the case can be prevented, and the case can be easily fabricated.

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1. A refrigerator, comprising: a refrigerator body having a cooling chamber;a case comprising a case body having a guide rail and a transformation preventing member formed of a higher strength material than a material of the case body, wherein the transformation preventing member is provided at a fr

1. A refrigerator, comprising: a refrigerator body having a cooling chamber;a case comprising a case body having a guide rail and a transformation preventing member formed of a higher strength material than a material of the case body, wherein the transformation preventing member is provided at a front opening of the case body to prevent transformation of the case;a drawer that is withdrawably accommodated in the case; anda retainer attached in the case to allow a door of the drawer to contact the case at a front opening thereof by a backward pulling of the drawer into the case by the retainer when the drawer is introduced into the case,wherein the retainer comprises:a guiding member extending from an end of the guiderail and attached to ax inner wall of the case to guide a movement of the drawer, the guiding member having a guiding slot extending along a major axis of the guiding member and a locking slot extending from an end of the guiding slot;a sliding member coupled to the guiding member, the sliding member being slidable on the guiding member;an elastic member having one end attached to the guiding member, having and another end attached to the sliding member, and having an elastic restoration force to provide the backward pulling of the drawer by the sliding member; anda locking member attached to an outer wall of the drawer, to reciprocate with the drawer on the guide rail, the locking member having a locked state to lock the sliding member when the drawer is withdrawn from the case, and a released state in which the sliding member is released from the locked state when the drawer is introduced into the case,wherein the sliding member comprises:a sliding body which reciprocates on the guiding member;a sliding rib extending from the sliding body; anda guide rail to which the guiding member is attached between the sliding body and the sliding rib,wherein the sliding member performs a reciprocating sliding motion on the guiding member via the guiderail, andwherein the sliding member comprises:a through hole formed at the sliding body in a vertical direction thereof;a first protrusion protruding toward an upper side of the through hole, and selectively locked by the locking member;a third protrusion protruding toward a lower side of the through hole and insertable into the guiding slot, the third protrusion performing a reciprocating sliding motion and selectively locked by the locking slot,a second protrusion, the second protrusion being a hinge shaft of the first protrusion and the third protrusion, whereby the second protrusion is inserted into the guiding slot from the sliding body and performs a reciprocating motion therein, andwherein the first protrusion and the third protrusion extend in a vertical orientation in a state where the through hole is interposed therebetween. 2. The refrigerator of claim 1, wherein the drawer comprises a roller which performs a reciprocating sliding motion on the guiderail. 3. The refrigerator of claim 1, wherein the guiding member comprises a first elastic member fixing portion attached to one end of the elastic member, and wherein the sliding member comprises a second elastic member fixing portion attached to another end of the elastic member. 4. The refrigerator of claim 1, wherein the locking member comprises a horizontal slot having an open rear side where the first protrusion is inserted, and an inclined slot extending from the horizontal slot. 5. The refrigerator of claim 4, wherein upper and lower surfaces of the inclined slot comprise: a first protrusion locking portion to move the sliding member forward by locking the first protrusion, when the drawer is withdrawn from and inserted into the case, anda first protrusion lock state releasing portion to release a lock state of the third protrusion to the locking slit of the guiding member when a downward force is applied to the first protrusion, when the drawer is closed. 6. The refrigerator of claim 1, further comprising: a depressurizing device that depressurizes an inside pressure of the drawer and the case such that the inside pressure is lower than an outside pressure of the case when the drawer is accommodated in the case. 7. The refrigerator of claim 1, further comprising: a sealing member provided at a contact portion between the drawer and an open portion of the case body;a sealed state maintaining device comprising: a locking portion provided at the case, anda coupling member that is movable to engage with the locking portion in a sealing position in which the sealing member is compressed between the open portion of the case body and the drawer accommodated in the case, thereby sealing the inside of the drawer and the case,wherein the coupling member is movable to disengage with the locking portion in a releasing position to be released from the sealed position; andan adjusting member provided at the drawer to move the coupling member between the sealing position and the releasing position. 8. The refrigerator of claim 7, wherein the coupling member comprises: a hook which rotates about a rotation shaft; anda hook spring to provide an elastic force to the hook such that the hook rotates to engage the locking portion in the sealing position. 9. The refrigerator of claim 8, wherein the refrigerator further comprises an operation bar provided between the adjusting member and the hook, to transmit a driving force for disengaging the hook from the locking portion to the hook when the adjusting member is moved. 10. A refrigerator, comprising: a refrigerator body having a cooling chamber;a case comprising a case body having a guide rail and a transformation preventing member formed of a higher strength material than a material of the case body, wherein the transformation preventing member is provided at a front opening of the case body to prevent transformation of the case; a drawer that is withdrawably accommodated in the case;a depressurizing device that depressurizes an inside pressure of the drawer and the case such that the inside pressure is lower than an outside pressure of the case when the drawer is accommodated in the case; anda retainer attached to the case to allow a drawer of the door to contact the case at the front opening thereof by a backward pulling of the drawer into the case by the retainer when the drawer is introduced into the case,wherein the retainer comprises:a guiding member extending from an end of the guiderail and attached to an inner wall of the case to guide a movement of the drawer, the guiding member having a guiding slot extending along a major axis of the guiding member and a locking slot extending from an end of the guiding slot;a sliding member coupled to the guiding member, the sliding member being slidable on the guiding member;an elastic member having one end attached to the guiding member having and another end attached to the sliding member, and having an elastic restoration force to provide the backward pulling of the drawer by the sliding member; anda locking member attached to an outer wall of the drawer, to reciprocate with the drawer on the guide rail, the locking member having a locked state to lock the sliding member when the drawer is withdrawn from the case, and a released state in which the sliding member is released from the locked state when the drawer is introduced into the case,wherein the sliding member comprises:a sliding body which reciprocates on the guiding member;a sliding rib extending from the sliding body; anda guide rail to which the guiding member is attached between the sliding body and the sliding rib,wherein the sliding member performs a reciprocating sliding motion on the guiding member via the guiderail, andwherein the sliding member comprises:a through hole formed at the sliding body in a vertical direction thereof;a first protrusion protruding toward an upper side of the through hole, and selectively locked by the locking member;a third protrusion protruding toward a lower side of the through hole and insertable into the guiding slot, the third protrusion performing a reciprocating sliding motion and selectively locked by the locking slot,a second protrusion, the second protrusion being a hinge shaft of the first protrusion and the third protrusion, whereby the second protrusion is inserted into the guiding slot from the sliding body and performs a reciprocating motion therein, andwherein the first protrusion and the third protrusion extend in a vertical orientation in a state where the through hole is interposed therebetween. 11. The refrigerator of claim 10, wherein the depressurizing device comprises a vacuum pump. 12. A refrigerator, comprising: a refrigerator body having a cooling chamber;a case comprising a case body having therein a guide rail and a transformation preventing member formed of a higher strength material than a material of the case body, wherein the transformation preventing member is provided at a front opening of the case body to prevent transformation of the case;a drawer that is withdrawably accommodated in the case;a depressurizing device that depressurizes an inside pressure of the drawer and the case such that the inside pressure is lower than an outside pressure of the case when the drawer is accommodated in the case;a sealed state maintaining device comprising:a locking portion provided at the case, anda coupling member that is movable to engage with the locking portion in a sealing position in which a sealing member is compressed between an open portion of the case body and the drawer accommodated in the case, thereby sealing the inside of the drawer and the case,wherein the coupling member is movable to disengage with the locking portion in a releasing position to be released from the sealed position;an adjusting member provided at the drawer to move the coupling member between the sealing position and the releasing position; anda retainer attached in the case to allow a drawer door to contact the case at the front opening thereof by a backward pulling of the drawer into the case by the retainer when the drawer is introduced into the case,wherein the retainer comprises:guiding member extending from an end of the guiderail and attached to an inner wall of the case to guide a movement of the drawer, the guiding member having a guiding slot extending along a major axis of the guiding member and a locking slot extending from an end of the guiding slot;a sliding member coupled to the guiding member, the sliding member being slidable on the guiding member;an elastic member having one end attached to the guiding member, having and another end attached to the sliding member, and having an elastic restoration force to provide the backward pulling of the drawer by the sliding member; anda locking member attached to an outer wall of the drawer, to reciprocate with the drawer on the guide rail, the locking member having a locked state to lock the sliding member when the drawer is withdrawn from the case, and a released state in which the sliding member is released from the locked state when the drawer is introduced into the case,wherein the sliding member comprises:a sliding body which reciprocates on the guiding member;a sliding rib extending from the sliding body; anda guide rail to which the guiding member is attached between the sliding body and the sliding rib,wherein the sliding member performs a reciprocating sliding motion on the guiding member via the guiderail, andwherein the sliding member comprises:a through hole formed at the sliding body in a vertical direction thereof;a first protrusion protruding toward an upper side of the through hole, and selectively locked by the locking member;a third protrusion protruding toward a lower side of the through hole and insertable into the guiding slot, the third protrusion performing a reciprocating sliding motion and selectively locked by the locking slot,a second protrusion, the second protrusion being a hinge shaft of the first protrusion and the third protrusion, whereby the second protrusion is inserted into the guiding slot from the sliding body and performs a reciprocating sliding motion therein, andwherein the first protrusion and the third protrusion extend in a vertical orientation in a state where the through hole is interposed therebetween. 13. The refrigerator of claim 12, wherein the coupling member comprises: a hook which rotates about a rotation shaft; anda hook spring to provide an elastic force to the hook such that the hook rotates to engage the locking portion in the sealing position. 14. The refrigerator of claim 13, wherein the refrigerator further comprises an operation bar provided between the adjusting member and the hook, to transmit a driving force for disengaging the hook from the locking portion to the hook when the adjusting member moves.