KR20020043852A - Vacuum refrigerator - Google Patents

Abstract

PURPOSE: A vacuum refrigerator is provided to prevent oxidation of stored food by discharging air to keep a food storage chamber in vacuum. CONSTITUTION: A vacuum refrigerator includes a vacuum chamber(30); a vacuum pump(40); and a control device. The vacuum chamber is placed on a cold air passage(1) and has a space part to place food therein. The vacuum pump discharges air in the vacuum chamber. The control device controls the vacuum pump to keep vacuum of the vacuum chamber fixed. The control device includes a low pressure recognizing pressure switch(51); and a high pressure recognizing pressure switch(52). The low pressure recognizing pressure switch stops the vacuum pump when vacuum in the vacuum chamber is lower than preset minimum pressure. The high pressure recognizing pressure switch drives the vacuum pump when vacuum in the vacuum chamber is higher than preset maximum pressure.

Description

Vacuum refrigerator {Vacuum refrigerator}

The present invention relates to a vacuum refrigerator, and more particularly, it is possible to store food for a long time by evacuating the air in the food storage chamber so that the food stored in the air is not oxidized by oxygen in the air to keep the food storage chamber in a vacuum state. .

Conventional refrigerators are generally divided into a freezer compartment and a refrigerating compartment to store food in a low temperature state by blowing cold air cooled in an evaporator into a freezer compartment and a refrigerating compartment by driving a fan installed at the back of the freezer compartment. Due to the oxidation of the stored food is promoted there was a problem that can not be stored for a long time due to the food being stored.

The present invention is to solve the problems of the prior art, the purpose of preventing the oxidation of the food stored by the oxygen in the air by evacuating the air to keep the food storage chamber in a vacuum state.

1 is a perspective view showing a schematic appearance of a vacuum refrigerator according to the present invention.

2 is a schematic cross-sectional view showing a vacuum chamber and its accompanying components in accordance with the present invention.

Figure 3a is a block diagram showing the operating state of the control means for maintaining the vacuum degree of the vacuum chamber according to the present invention.

Figure 3b is a graph maintaining the vacuum degree by the control means according to the present invention.

Figure 4 is a cross-sectional view showing a close contact means for close contact with the vacuum chamber and the door according to the present invention.

Figure 5 is a detail view "A" part of Figure 2 showing a vacuum releasing means according to the present invention.

6 is a cross-sectional view showing a compartment control means according to the present invention.

Figure 7 is a cross-sectional view showing the air inlet blocking means according to the invention.

Explanation of symbols for main parts of the drawings

1: cold air path 4: evaporator

5: drain pipe 10: refrigerating chamber

20: freezing chamber 30: vacuum chamber

30a: opening 31: door

32: sealing member 33: valve body

34: elastomer 35: handle

36: link member 40: vacuum pump

41: Connection hose 51: Low pressure detection pressure switch

52: high pressure recognition pressure switch 61: cold air inlet hose

62: temperature sensor 63: cold air shutoff valve

71: pin 72: auxiliary pin

81: check valve 82: air inlet hose

83: outside air inlet valve 84: oxygen permeation filter

91: exhaust hose 92: discharge port

93: nozzle 110: partition

110a: through-hole 121: valve body

122: elastic body 131: first valve

132: defrost water storage chamber 133: second valve

In order to achieve the above object, the present invention provides a refrigerator compartment and a freezing compartment on the cold air flow path to refrigerated or frozen food, comprising: a vacuum chamber provided on the cold air flow path and formed with a space to accommodate the food; It provides a vacuum refrigerator comprising a vacuum pump for discharging the air in the vacuum chamber to the outside, and a control means for controlling the vacuum pump to maintain a constant degree of vacuum in the vacuum chamber.

Referring to the drawings to describe the above content in more detail as follows.

1 is a perspective view showing a schematic appearance of a vacuum refrigerator according to the present invention, Figure 2 is a schematic cross-sectional view showing a vacuum chamber according to the present invention and its components, Figure 3a is a vacuum degree of the vacuum chamber according to the present invention Figure 3b is a block diagram showing the operating state of the control means for, Figure 3b is a vacuum degree maintenance graph by the control means according to the present invention.

4 is a cross-sectional view showing a close contact means for closely contacting the vacuum chamber and the door according to the present invention, and FIG. 5 is a detailed view of part "A" of FIG.

6 is a cross-sectional view showing the kankan control means according to the present invention, Figure 7 is a cross-sectional view showing the outside air blocking means according to the present invention.

1 and 2, in the vacuum refrigerator according to the present invention, the refrigerator compartment 10 and the freezer compartment 20 are provided on the cold air flow path 1 so as to store or refrigerated food, the cold air The vacuum chamber 30 provided on the flow path and formed with a space to accommodate the food, the vacuum pump 40 for discharging air in the vacuum chamber to the outside, and the vacuum pump to control the degree of vacuum in the vacuum chamber Control means for maintaining a constant is included.

At this time, the vacuum chamber is provided in the refrigerating chamber 10, as shown in Figure 1 and 2, may be formed integrally with the inner wall of the refrigerating chamber, or may be detachably provided with the inner wall of the refrigerating chamber. . In addition, as shown in FIG. 6, the entire refrigerating compartment 10 may be a vacuum chamber 30, and as illustrated in FIG. 7, the cold air passage including the freezing compartment 20 and the refrigerating compartment 10 ( 1) The whole may be a vacuum chamber 30.

And, the control means, as shown in Figure 2 to 3b when the vacuum pressure in the vacuum range 30 is maintained at the minimum pressure (L) or less of the pressure range (S) to maintain the driving of the vacuum pump 40 A low pressure recognition pressure switch 51 for stopping and a high pressure recognition pressure switch 52 for driving the vacuum pump when the maximum pressure H is greater than or equal to the pressure range S in which the degree of vacuum in the vacuum chamber is maintained are included.

The vacuum refrigerator according to the present invention made as described above performs the following operation.

After opening the door 31 provided in the opening of the vacuum chamber 30 to put food, and closing the door, the vacuum pump 40 is driven to exhaust the air in the vacuum chamber to the outside. At this time, the control means for maintaining a constant degree of vacuum in the vacuum chamber performs the following operation.

As shown in FIG. 3A, when the pressure in the vacuum chamber 30 is equal to or higher than the maximum pressure H in the pressure range S in which the degree of vacuum is maintained, the high pressure recognition pressure switch 52 is closed and the vacuum pump 40 Start to drive. Thereafter, as the pressure in the vacuum chamber decreases, the high pressure recognition pressure switch is opened but the vacuum pump continues to be driven.

When the pressure in the vacuum chamber 30 falls below the minimum pressure L in the pressure range S in which the degree of vacuum is maintained, the low pressure recognition pressure switch 51 is closed and the driving of the vacuum pump 40 is stopped. Afterwards, when the micro leakage occurs in the vacuum chamber, the pressure in the vacuum chamber rises and the pressure in the vacuum chamber becomes higher than the maximum pressure H in the pressure range S in which the degree of vacuum is maintained. The operation is repeated while closing.

In addition, when the door 31 provided in the vacuum chamber 30 is opened, the operation of the vacuum pump 40 is stopped, and when the door is closed again, the vacuum pump is driven to repeat the above operation.

Therefore, the control means can maintain the degree of vacuum in the vacuum chamber 30 in a predetermined range S rather than one value, as shown in FIG. 3B, thereby preventing overcharge of the vacuum pump in advance. have.

On the other hand, in order to implement the above-mentioned vacuum refrigerator preferably can be made including the following various embodiments.

First, the vacuum refrigerator according to the present invention, when the door 31 for opening and closing the vacuum chamber 30 is closed, it is preferred that the vacuum chamber and the door is in close contact is made to further include a sealing means.

At this time, the contact means, as shown in Figure 4, the opening of the vacuum chamber 30 is formed to be inclined, the door 31 is provided rotatably on the upper end of the opening, the opening and the The sealing member 32 is installed between the doors so that the door and the opening are in close contact with each other by the weight of the door.

Second, the vacuum refrigerator according to the present invention preferably further comprises a rapid cooling means for lowering the temperature of the food to an appropriate temperature before the food is placed in the vacuum chamber 30 is stored in a vacuum.

At this time, the rapid cooling means according to an embodiment, as shown in Figure 2, the vacuum chamber 30 and the cold air flow path (1) to communicate with each other so that the cold air flow into the vacuum chamber to the cold air flow path A cold air inlet hose 61, a cold air inlet valve 63 provided in the cold air inlet hose to open and close the cold air inlet hose, a temperature sensor 62 provided in the vacuum chamber to measure the temperature of the food; Open the cold air inlet valve 61 so that cold air flows into the vacuum chamber before the food is vacuumed, and closes the cold air inlet valve when the temperature of the food measured by the temperature sensor 62 is lower than the set temperature. It consists of micom (not shown).

The rapid cooling means according to the temporary date made as described above performs the following operation.

By the microcomputer, the cold air inlet valve 63 continues to be opened by the microcomputer until the temperature of the food reaches a preset temperature for the microcomputer that is suitable for storing the food. When the cold air is introduced and the food temperature in the vacuum chamber 30 reaches the set temperature, the vacuum pump 40 is operated after the cold air inlet valve 63 is closed by the microcomputer to exhaust the air in the vacuum chamber. . Therefore, the amount of air in the vacuum chamber 30 during the vacuum is reduced, it is possible to prevent the problem that the mutual heat transfer between the food in the vacuum chamber and the cold air flow path 1 is difficult.

In addition, the rapid cooling means according to another embodiment, although not shown, cold air inlet hole (not shown) on one side of the vacuum chamber so that cold air of the cold air flow path 1 flows into the vacuum chamber 30. Is formed, a damper (not shown) for opening the cold air inlet is provided on the cold air inlet side, a temperature sensor 62 for measuring the temperature of the food is provided in the vacuum chamber, and the food is stored in a vacuum. A microcomputer (not shown) is provided to open the damper so that cold air flows into the vacuum chamber and close the damper when the temperature of the food measured by the temperature sensor is lower than the set temperature before the cold air.

In addition, the rapid cooling means may be further provided on the inner side of the vacuum chamber fan (not shown) for forced convection of the cold air in the vacuum chamber (30).

Rapid cooling means according to another embodiment made as described above performs the following operation.

The damper (not shown) is kept open by the microcomputer until the temperature of the food reaches a predetermined temperature for storing the food, and the cold air flow path into the vacuum chamber 30 is maintained. The cold air of 1) is introduced, and the fan (not shown) is also driven so that the cold air is rapidly introduced into the vacuum chamber. After that, when the food temperature in the vacuum chamber reaches the set temperature, the vacuum pump 40 is operated after the damper is closed by the microcomputer to exhaust the air in the vacuum chamber.

Even after the damper is closed, when the food temperature in the vacuum chamber 30 becomes higher than the set temperature, the fan (not shown) is driven by the microcomputer to force convection of cold air in the vacuum chamber, and the food temperature in the vacuum chamber is set to the set temperature. When it becomes below, the drive of the fan is stopped by the microcomputer. Therefore, the amount of air in the vacuum chamber 30 during the vacuum is reduced, it is possible to prevent the problem that the mutual heat transfer between the food in the vacuum chamber and the cold air flow path 1 is difficult.

Third, the vacuum refrigerator according to the present invention preferably further comprises heat exchange promoting means for promoting heat exchange between the cold air passage 1 and the food in the vacuum chamber 30.

At this time, the heat exchange promoting means, as shown in Figure 2 is provided in the vacuum chamber 30, the plurality of fins 71 provided to be exposed to the inside / outside of the vacuum chamber, respectively, between each fin It consists of a plurality of auxiliary pins 72 provided.

Fourth, in the vacuum refrigerator according to the present invention, as shown in Figure 2, when the operation of the vacuum pump 40 stops the outside of the vacuum chamber and the vacuum pump so as not to flow into the vacuum chamber 30 It is preferable that the check valve 81 is further included in the connection hose 41 to be connected.

In addition, the vacuum refrigerator according to the present invention, the initial operation of the vacuum pump 40 or the reprocessing initial after the operation is stopped, the vacuum pump by the stopping force of the check valve 81 and the vacuum force of the vacuum chamber In order to prevent overloading in advance, it is preferable that an external air inflow means for introducing external air into the vacuum pump 40 is further included.

At this time, the external air inlet means, as shown in Figure 2 is provided with one end in communication with the connection hose 41 between the check valve 81 and the vacuum pump 40, the other end is in communication with the outside The inlet hose 82, the external air inlet valve 83 provided in the external air inlet hose to open and close the external air inlet hose, and the initial air inlet valve of the vacuum pump 40 after the operation is started or stopped again. It is made of a microcomputer (not shown) that opens and closes the outside air inlet valve after a predetermined time.

The check valve 81 and the outside air inflow means made as described above perform the following operation.

When the operation of the vacuum pump 40 is stopped, the inflow of external air into the vacuum chamber 30 is blocked by the check valve 81. In addition, the check valve 81 is closed at the beginning of the operation of the vacuum pump or after the operation is stopped, and the air inlet valve 83 is opened by the microcomputer to allow the external air to flow into the vacuum pump 40 while the vacuum pump is opened. It starts running. If the operation of the vacuum pump 40 becomes smooth after a predetermined time, the outside air inlet valve 83 is closed by the microcomputer, and the check valve 81 is opened by the pumping force of the vacuum pump to exhaust the air in the vacuum chamber 30. do.

Fifth, the vacuum refrigerator according to the present invention preferably further includes oxygen removing means for discharging only oxygen in the vacuum chamber 30 to the outside when the vacuum pump 40 is operated.

As shown in FIG. 2, the oxygen removing means is provided in a connection hose 41 that interconnects the vacuum chamber 30 and the vacuum pump 40 to transmit oxygen only in the vacuum chamber. 84 and a fixing bracket (not shown) provided in the connection hose to fix the oxygen permeation filter.

Sixth, in the vacuum refrigerator according to the present invention, it is preferable that the oil backflow prevention means is further included so that oil generated in the vacuum pump 40 does not flow back into the vacuum chamber 30 due to a density difference.

At this time, the oil backflow prevention means, although not shown is provided in the connection hose 41 for interconnecting the vacuum chamber 30 and the vacuum pump 40, the oil adsorbs the oil generated in the vacuum pump Adsorption filter (not shown) and a fixed bracket (not shown) provided in the connection hose to fix the oil adsorption filter.

Seventh, the vacuum refrigerator according to the present invention, the compressor (2) or condenser (3) in which the cold air discharged from the vacuum pump 40 emits a lot of heat among the components of the refrigeration cycle (compressor, condenser, capillary tube, evaporator) It is preferable to further comprise a cooling exhaust means for cooling the compressor or the condenser to be discharged to).

At this time, the exhaust means for cooling, the exhaust hose 91 for guiding the cold air discharged from the vacuum pump 40 to the components (2, 3) of the refrigeration cycle, as shown in FIG. It is provided at the end of the exhaust hose and consists of a discharge port 92 for discharging cold air to the components (2, 3) of the refrigeration cycle.

In addition, the exhaust means for cooling may further include a nozzle 93 at the end of the discharge port 92 so that the cold air is injected toward the compressor 2 or the condenser 3.

Eighth, the vacuum refrigerator according to the present invention, as shown in Figure 2 and 4, when opening the vacuum chamber 30, the door 31 is not opened well due to the pressure difference inside / outside the vacuum chamber. In order to prevent in advance, it is preferable that the vacuum release means for releasing the vacuum in the vacuum chamber is further included.

At this time, the vacuum release means, as shown in Figure 5, the opening 30a is formed in the vacuum chamber so that the inside / outside of the vacuum chamber 30, the valve body 33 for opening and closing the opening is It is provided in the opening part, and the elastic body 34 is provided between the valve body and the said opening part so that a valve body may return to original after the said valve body opens.

In addition, the vacuum releasing means may be provided in the door 31 that opens and closes the vacuum chamber 30.

At this time, the handle 35 provided on the door 31 is further provided with a link member 36 whose one end is linked and the other end is in contact with the valve body 33. When the handle is pulled, the link member is a valve. The door can be opened after the sieve is opened to open the opening.

The vacuum release means made as above is operated as follows.

In order to release the vacuum in the vacuum chamber 30, the valve body 33 installed in the door 31 is simply pressed in the direction of the arrow in FIG. 5. At this time, when the user pulls the handle 35, it is linked with the handle. Since the opening 30a is opened by the valve member 33 being retracted in the direction of the arrow by the link member 36, outside air flows into the vacuum chamber 30 through the opening, and the vacuum in the vacuum chamber is released and the door ( 31 is easily opened. After the external force applied to the valve body is removed, the valve body returns to its original position by the restoring force of the elastic body 34.

As described above, the operation of the vacuum refrigerator according to the present invention and various embodiments accompanying the present invention will be described as follows.

First, when the door 31 provided in the opening of the vacuum chamber 30 is opened to put food in and then the door is closed, the door 31 rotates in the direction of the arrow as shown in FIG. The door and the opening are tightly sealed by the sealing member 32 while the opening is pressed by the load of the door itself while being seated on the photo opening.

Then, cold air is introduced into the vacuum chamber 30 through the cold air inlet hose 61 communicating with the cold air flow path 1, and if the temperature of the food is approximately equal to the temperature of the cold air flow path, the cold air inflow valve is made by the microcomputer. 63 is closed. On the other hand, the food 71 and the cold air in the cold air flow path 1 in the vacuum chamber 30 by the pin 71 or the auxiliary pin 72, etc. are continuously exchanged with each other during the refrigeration cycle.

After that, when the operation of the vacuum pump 40 starts, the outside air inlet valve 83 is opened by the microcomputer at the beginning of operation, and the outside air is introduced through the outdoor air inlet hose 82, and the vacuum pump 40 passes after a predetermined time. When the air starts to operate smoothly, the outside air inlet valve is closed by the microcomputer and the check valve 81 is opened by the pressure difference, and the air of the vacuum chamber starts to be exhausted to the outside. At this time, only oxygen in the air in the vacuum chamber is exhausted to the outside by the oxygen permeation filter 84. In addition, the oil of the vacuum pump 40 flowing back to the vacuum chamber due to the density difference is adsorbed to the oil adsorption filter.

At the same time, the cold air discharged to the exhaust hose 91 through the vacuum pump 40 cools the compressor 2 or the condenser 3.

Thereafter, when the pressure in the vacuum chamber 40 becomes less than or equal to the minimum pressure L of the preset pressure range S, the low pressure recognition pressure switch 51 is closed and the driving of the vacuum pump 40 is stopped. On the other hand, when the door 31 is opened or micro leakage of the vacuum chamber 30 occurs, the pressure in the vacuum chamber rises, the low pressure recognition pressure switch is opened, and the high pressure recognition pressure switch 52 is closed to drive the vacuum pump. .

Finally, in order to take out the food from the vacuum chamber 30, when the handle 35 of the door 31 is pulled, the link member 36 pushes the vacuum release valve body 33, thereby opening the opening 30a. The vacuum in the vacuum chamber is released. At the same time the door is opened by the handle.

On the other hand, the vacuum refrigerator according to the present invention, the partition 110 for partitioning the vacuum chamber 30 into a plurality of small vacuum chamber, and discharge the air of the small vacuum chamber, but discharges the air sequentially for each compartment vacuum Kankan control means for maintaining a state may be further included.

At this time, the compartment control means, as shown in Figure 6, the through holes 110a are formed in each partition 110, the valve body 121 for opening and closing the through holes in accordance with the vacuum degree of the small vacuum chamber Is provided in each of the through holes, and an elastic body 122 having a predetermined modulus of elasticity is provided between the through part and the valve body so that the valve body opens and closes due to the pressure difference.

Khan compartment control means made as described above performs the following operations.

The vacuum pump 40 first discharges the air in the small vacuum chamber positioned below the vacuum chamber 30 to lower the pressure in the small vacuum chamber. Thereafter, the elastic body 122 is compressed by the pressure difference between the pressure of the small vacuum chamber and the pressure of the small vacuum chamber located above the partition 110, and the valve body 121 is pressed and the through hole 110a is opened. Thus, the operation of the vacuum pump 40 is continued while the air inside the upper small vacuum chamber is moved to the lower small vacuum chamber.

When the pressure of the small vacuum chamber located at the top reaches a predetermined pressure while the operation is continuously performed, the degree of vacuum in the vacuum chamber 30 is turned on / off by driving the vacuum pump 40 by the aforementioned control means. Will be maintained.

On the other hand, when the vacuum chamber 30 according to the present invention forms the refrigerating chamber 10 including the cold air flow path 1 and the freezing chamber 20 as a whole, the first generation of the evaporator 4 provided on one side of the freezing chamber When water is discharged along the drain pipe 5, a problem may arise in which external air flows into the vacuum chamber along the drain pipe.

Therefore, in order to prevent this in advance, it is preferable that the air inlet blocking means is further included in defrosting.

At this time, the defrosting air inlet blocking means at the time of defrosting, as shown in Figure 7, the first valve 131 which is provided on the upper portion of the drain pipe 5 to open and close the upper portion of the drain pipe, 1 is provided between the valve and the end of the drain pipe is provided between the defrost water storage chamber 132 for storing the defrost water introduced through the first valve, and between the defrost water storage chamber and the end of the drain pipe to provide a lower portion of the drain pipe. When opening and closing the second valve 133, the first valve so that the defrost water is moved to the lower portion of the drain pipe, and normally closes the second valve so that external air does not flow into the vacuum chamber, when the defrost water discharge And a microcomputer (not shown) which opens the second valve to discharge the defrost water to the outside and closes the first valve to prevent external air from flowing into the vacuum chamber.

The defrosting air inlet blocking means made as described above performs the following operation.

First, when the vacuum chamber 30 maintains the vacuum state, the first valve 131 is opened by the microcomputer to move the defrost water generated in the evaporator 4 to the defrost water storage chamber 132. At the same time, the second valve 133 is closed by the microcomputer to block external air from entering the vacuum chamber 30.

When the defrost water is discharged to the outside, the first valve 131 is closed by the microcomputer to block external air from flowing into the vacuum chamber 30, and at the same time, the second valve 133 by the microcomputer. ) Is opened so that the defrost water in the defrost water storage chamber 132 is drained to the outside.

So far, the present invention has been described with reference to the preferred embodiments, and those skilled in the art to which the present invention pertains to the detailed description of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be implemented. Herein the essential technical scope of the present invention is shown in the claims.

As described above, the present invention maintains a vacuum state by evacuating the air in the vacuum chamber for storing the food, thereby preventing the oxidation of the food stored by the oxygen in the air, which can be stored for a long time. have.

In addition, various components added to the present invention can maximize the effect of the present invention and the effects are as follows.

First, when the door is closed, as the opening of the door and the vacuum chamber is tightly sealed, it is possible to improve the reliability of the device by blocking the inflow of external air between the door and the opening of the vacuum chamber during vacuum.

Second, before the food is stored in a vacuum, as the food is rapidly cooled, the problem of weak heat transfer generated during the vacuum can be overcome, and the food can be stored for a long time while maintaining the freshness of the food.

Third, even while the food is stored in a vacuum, heat exchange with the cold air flow path is possible, thereby increasing the freshness of the food.

Fourth, it is possible to prevent the overload of the vacuum pump generated by the initial pressure difference of the driving of the vacuum pump, thereby improving the reliability of the device.

Fifth, since nitrogen that exhausts only oxygen, which is a cause of food oxidation in the air in the vacuum chamber, and doubles the food storage effect remains, the food can be stored for a long time while preventing oxidation of the food.

Sixth, it is possible to prevent the foreign matter introduced into the vacuum chamber by the density difference, it is possible to improve the reliability of the device.

Seventh, as the compressor or the condenser of the components of the refrigeration cycle is cooled by the cold air discharged from the vacuum pump, it is possible to improve the efficiency of the device.

Eighth, when the door is opened, as the vacuum in the vacuum chamber is released, the door can be easily opened to improve the reliability of the device.

Claims (33)

In the refrigerator compartment and the freezer compartment are provided on the cold air flow path for refrigeration or freezing of food, A vacuum chamber provided on the cold air flow path and formed with a space to accommodate the food; A vacuum pump for discharging air in the vacuum chamber to the outside; And a control means for controlling the vacuum pump to maintain a constant degree of vacuum in the vacuum chamber. The method of claim 1, And the vacuum chamber is provided in the refrigerating chamber. The method of claim 2, And the vacuum chamber is integrally formed with the inner wall of the refrigerating chamber. The method of claim 2, The vacuum chamber is a vacuum refrigerator, characterized in that detachable with the inner wall of the refrigerating chamber. The method of claim 1, And the refrigerator compartment is the vacuum chamber. The method of claim 1, And the refrigerator compartment and the freezer compartment including the cold air flow path are the vacuum chambers. The method of claim 1, The control means; A low pressure detecting pressure switch for stopping the driving of the vacuum pump if the vacuum pressure in the vacuum chamber is lower than or equal to the minimum pressure; And a high pressure recognition pressure switch for stopping the driving of the vacuum pump when the vacuum pressure in the vacuum chamber is equal to or higher than a maximum pressure range. The method of claim 1, And a close contact means for tightly sealing the vacuum chamber and the door when the door for opening and closing the vacuum chamber is closed. The method of claim 8, The contact means is; The opening of the vacuum chamber is inclined, The door is rotatably provided at the upper end of the opening, Sealing member is mounted between the opening and the door, And the door and the opening are in close contact with each other by the weight of the door. The method according to claim 2 or 5, And a rapid cooling means for lowering the temperature of the food to an appropriate temperature before the food seated in the vacuum chamber is vacuum-stored. The method of claim 10, The rapid cooling means; A cold air inlet hose which communicates the vacuum chamber with the cold air passage to allow cold air to flow into the vacuum chamber; A cold air inlet valve provided in the cold air inlet hose to open and close the cold air inlet hose; A temperature sensor provided in the vacuum chamber and measuring a temperature of the food; Before the food is stored in a vacuum, the cold air inlet valve is opened so that cold air flows into the vacuum chamber, and if the temperature of the food measured by the temperature sensor is lower than the set temperature, a microcomputer is included to close the cold air inlet valve. Vacuum refrigerator characterized in that. The method of claim 10, The rapid cooling means; Cold air inlet hole is formed on one side of the vacuum chamber so that cold air into the cold air flow path into the vacuum chamber, A damper for opening and closing the cold air inlet is provided on the cold air inlet side, A temperature sensor for measuring the temperature of the food is provided in the vacuum chamber, Before the food is stored in a vacuum, opening the damper so that cold air flows into the vacuum chamber, and if the temperature of the food measured by the temperature sensor is lower than the set temperature, a microcomputer is provided to close the damper. Vacuum refrigerator. The method according to claim 1 or 12, And a fan is further provided on an inner wall of the vacuum chamber so that cold air in the vacuum chamber is forced convection. The method according to claim 2 or 5, And a heat exchange promoting means is further included to facilitate heat exchange between the cold air flow path and the food in the vacuum chamber. The method of claim 14, The heat exchange promoting means; A plurality of pins provided in the vacuum chamber, the pins being respectively exposed to the inside / outside of the vacuum chamber; Vacuum refrigerator, characterized in that consisting of a plurality of auxiliary pins provided between each pin. The method of claim 1, And a check valve provided in a connection hose interconnecting the vacuum chamber and the vacuum pump to prevent external air from entering the vacuum chamber when the vacuum pump is stopped. The method of claim 16, The initial operation of the vacuum pump or restarting after the operation is stopped, the vacuum refrigerator, characterized in that further comprises an external air inlet means for introducing external air into the vacuum pump. The method of claim 17, The outside air inlet means; An external air inlet hose having one end connected to the check hose between the check valve and the vacuum pump and the other end communicating with the outside; An external air inlet valve provided in the external air inlet hose to open and close the external air inlet hose; The initial stage of the operation of the vacuum pump or restarting after the operation is stopped, the vacuum inlet comprises opening the outside air inlet valve and closing the outside air inlet valve after a predetermined time. The method of claim 1, And an oxygen removing means for exhausting only the oxygen in the vacuum chamber to the outside when the vacuum pump is operated. The method of claim 19, The oxygen removing means is; An oxygen permeation filter provided in a connection hose connecting the vacuum chamber and the vacuum pump to each other to transmit only oxygen in the vacuum chamber; And a fixing bracket provided on the connection hose to fix the oxygen permeation filter. The method of claim 1, And an oil backflow preventing means for preventing the oil generated in the vacuum pump from flowing back into the vacuum chamber by the density difference. The method of claim 21, The oil backflow prevention means; An oil adsorption filter provided at a connection hose interconnecting the vacuum chamber and the vacuum pump to adsorb oil generated by the vacuum pump; And a fixing bracket provided on the connection hose to fix the oil adsorption filter. The method of claim 1, And a cooling exhaust means for cooling the compressor or the condenser by allowing the cold air discharged from the vacuum pump to be discharged to a compressor or a condenser that is a component of a refrigeration cycle. The method of claim 23, The cooling exhaust means; An exhaust hose for guiding the cold air discharged from the vacuum pump to the compressor or the condenser; And a discharge port provided at an end of the exhaust hose to discharge cold air to the compressor or condenser. The method of claim 24, And a nozzle is further provided at an end of the discharge port so that the cold air is injected. The method of claim 1, And a vacuum release means for releasing the vacuum in the vacuum chamber when the vacuum chamber is opened. The method of claim 26, The vacuum release means; An opening is formed in the vacuum chamber so that the inside / outside of the vacuum chamber passes, A valve body for opening and closing the opening is provided in the opening, And an elastic body is provided between the valve body and the opening so that the valve body returns to its original position after the valve body is opened. The method of claim 27, The vacuum refrigerator, characterized in that the vacuum release means is provided in the door that opens and closes the vacuum chamber. The method of claim 28, And a link member having one end linked to the handle provided at the door and the other end contacting the valve body, and when the handle is pulled, the link member presses the valve body to open the opening and then the door is opened. Vacuum refrigerator made with. The method of claim 1, A partition for partitioning the vacuum chamber into a plurality of small vacuum chambers; And a compartment control means for discharging the air of the small vacuum chamber, but the compartment control means for discharging air sequentially for each compartment to maintain a vacuum state. The method of claim 30, The compartment control means; Through-holes are formed in each partition, The valve body for opening and closing the through hole is provided in each of the through parts, And an elastic body having a predetermined modulus of elasticity between the through-hole and the valve body to open and close the valve body by a pressure difference between the small vacuum chambers. The method of claim 6, When the defrost water generated from the evaporator provided on one side of the freezer compartment is discharged to the drain pipe, the external air inlet blocking means for blocking the outside air flowing into the vacuum chamber along the drain pipe further comprises. The method of claim 32, The external air inlet blocking means; A first valve provided at an upper portion of the drain pipe to open and close an upper portion of the volleyball pipe; A defrost water storage chamber provided in the drain pipe and provided between the first valve and an end of the drain pipe to store defrost water introduced through the first valve; A second valve provided between the defrost water storage chamber and an end of the drain pipe to open and close a lower portion of the drain pipe; Normally, opening the first valve to move the defrost water to the lower portion of the drain pipe and closing the second valve to prevent external air from flowing into the vacuum chamber, and when the defrost water is discharged, And a microcomputer that opens the second valve and closes the first valve to prevent external air from flowing into the vacuum chamber.