JP5637948B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

  As a background art in this technical field, there is one disclosed in Japanese Patent Laid-Open No. 10-103849 (Patent Document 1). This refrigerator is equipped with a decompression storage room into which cooling air does not enter and a vacuum pump for decompressing the decompression storage room. Air pressure detection means and a maturation promoting gas (ethylene gas) generated from fruits and vegetables are contained in the storage room. Gas detection means for detection is installed, and pressure reduction control in the storage chamber is performed according to the pressure and gas concentration detected by the air pressure detection means and the gas detection means.

  Moreover, there exists Unexamined-Japanese-Patent No. 2009-36440 (patent document 2). This refrigerator has a low-pressure chamber, a vacuum pump that sucks and decompresses air in the low-pressure chamber, and a pressure detection means that determines whether the pressure in the low-pressure chamber is higher or lower than a predetermined pressure range, and operates the vacuum pump. Then, after it is determined that the pressure has fallen to the predetermined pressure range, it is determined that the depressurization target has been reached after elapse of a predetermined time after the accumulated operation time of the vacuum pump, and the vacuum pump is stopped. A pressure switch as pressure detecting means is built in the vacuum pump, and the pressure switch is connected to the low-pressure chamber through a conduit so that the pressure in the low-pressure chamber can be detected.

Japanese Patent Laid-Open No. 10-103849 JP 2009-36440 A

  However, the above-described conventional example has the following problems.

  In Patent Document 1, both the pressure detection means for detecting the air pressure in the storage chamber and the gas detection means for detecting the aging promoting gas are installed in the storage container, and the decompression means is controlled based on the output from these detection means. However, the decompression means is installed outside the storage room, and the connection method between the detection means and the decompression means is not clearly described. In order to connect the detection means in the storage chamber and the decompression device outside the storage chamber, a hole through which the connecting member is passed is necessary, and the decompression state in the storage chamber cannot be maintained by the hole. It is necessary to add a part to prevent this, and there is a concern that the cost increases and the reliability decreases.

  In Patent Document 2, a pressure switch, which is a pressure detection means for determining whether the pressure in the low pressure chamber is higher or lower than a predetermined pressure range, is built in the vacuum pump, and both the pressure detection means and the vacuum pump are located outside the low pressure chamber. It is not necessary to make a hole in the low-pressure chamber. However, since there is no detection means for detecting a gas state other than the pressure in the low pressure chamber, the type, concentration, temperature, etc. of the gas cannot be detected, and the type and temperature of the stored item in the low pressure chamber cannot be determined. It is difficult to keep the optimal storage state.

  Then, an object of this invention is to provide the refrigerator which detects the gas in the storage chamber decompressed and controls it to the preservation | save state suitable for a stored item.

In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems. For example, a refrigerator having a storage chamber and a decompression unit that decompresses the gas in the storage chamber by discharging the gas out of the storage chamber. And detecting means for detecting at least one of the type, concentration and temperature of the gas discharged from the storage chamber by the decompression means, the decompression means being housed in a container, and the detection means comprising the container It does not contact the pressure reducing means of the inner Ru installed in position.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator which detects the gas in the pressure-reduced storage chamber and controls it to the preservation | save state suitable for stored goods can be provided.

It is a center longitudinal cross-sectional view of the refrigerator of one embodiment of this invention. It is a cross-sectional perspective view of the lowermost space part of the refrigerator compartment shown in FIG. It is a front view of the back panel of the refrigerator compartment shown in FIG. It is a figure explaining the difference in the carbon dioxide generation amount by food. It is sectional drawing of the negative pressure pump shown in FIG. FIG. 6 is a cross-sectional view of another embodiment of the negative pressure pump shown in FIG. 2 different from FIG. 5. It is a control block diagram which shows the content of the control in the refrigerator of this Embodiment.

  The present invention is a refrigerator provided with a storage chamber and a decompression means for reducing the pressure by discharging the gas in the storage chamber to the outside of the storage chamber, the kind and concentration of the gas exhausted from the storage chamber by the decompression means , Provided with a detecting means for detecting at least one of the temperatures.

  Thereby, it is not necessary to provide an opening such as a hole through which wiring for connecting the detection means and the temperature control means is provided in the storage room, and an inexpensive and highly reliable refrigerator can be provided.

  Moreover, the control means which controls the temperature of the said storage chamber based on the information of at least any one of the kind of gas detected by the said detection means, density | concentration, and temperature is provided.

  Thereby, according to the foodstuff accommodated in the decompression storage room | chamber interior, it can be accurately maintained at predetermined temperature.

  The decompression means is housed in a container, and the detection means is installed at a position not in contact with the decompression means in the container. Thereby, the detection precision of a detection means can be improved, without preventing pressure reduction operation | movement.

  The decompression means is disposed in the container via a buffer member that absorbs vibration generated from the decompression means. Thereby, generation | occurrence | production of the noise of a refrigerator can be suppressed and appropriate pressure reduction operation | movement can be performed, and suitable detection can be performed with a detection means.

  Moreover, the temperature detection means which detects the temperature of gas among the said detection means is provided in the outer surface of the said storage chamber. Thereby, it is possible to detect the gas in the vacuum storage chamber while maintaining the hermeticity of the vacuum storage chamber, and to control the atmosphere suitable for the stored food based on the detected gas.

  Moreover, the means for detecting at least one of the type and concentration of gas among the detection means is a carbon dioxide sensor. Thereby, the case where the vegetable was accommodated can be detected and based on this, temperature control can be performed so as to prevent the vegetable from freezing.

  Hereinafter, a refrigerator according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  First, the configuration of the refrigerator according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a central longitudinal sectional view of the refrigerator of the present embodiment, and FIG. 2 is a sectional perspective view of a lowermost space portion of the refrigerator compartment shown in FIG.

  As is clear from these drawings, the refrigerator includes a refrigerator body 1 and a plurality of doors 6 to 10 provided on the front surface thereof. The refrigerator body 1 is composed of a steel plate outer box 11, a resin inner box 12, a urethane foam heat insulating material 13 and / or a vacuum heat insulating material (not shown) filled therebetween, A plurality of storage rooms are formed in the order of the refrigerator compartment 2, the freezer compartments 3 and 4, and the vegetable compartment 5 from the top of the figure. In other words, the refrigerator compartment 2 is arranged at the top and the vegetable compartment 5 is divided and arranged at the bottom, and both the compartments are provided between the refrigerator compartment 2 and the vegetable compartment 5. Freezer compartments 3 and 4 that are thermally partitioned from each other are disposed. The refrigerator compartment 2 and the vegetable compartment 5 are storage compartments in a refrigeration temperature zone, and the freezer compartments 3 and 4 are storage compartments in a freezing temperature zone of 0 ° C. or less (for example, a temperature zone of about −20 ° C. to −18 ° C.). It is. These storage chambers 2 to 5 are partitioned by partition walls 33, 34, and 35.

  As described above, doors 6 to 10 are provided on the front surface of the refrigerator body 1 in order to close the front opening portions of the plurality of storage chambers 2 to 5, respectively. The refrigerator compartment door 6 closes the front opening of the refrigerator compartment 2, the freezer compartment door 8 closes the front opening of the freezer compartment 3, and the freezer compartment door 9 closes the front opening of the freezer compartment 4. The vegetable compartment door 10 is a door that closes the front opening of the vegetable compartment 5. Moreover, the refrigerator compartment door 6 is constituted by a double door with double doors, and the freezer compartment door 8, the freezer compartment door 9, and the vegetable compartment door 10 are constituted by drawer type doors. The structure is drawn out.

  The refrigerator body 1 having the above-described structure is provided with a refrigeration cycle. The refrigeration cycle includes a compressor 14, a condenser (not shown), a capillary tube (not shown), an evaporator 15, and again a compressor 14 connected in that order. The compressor 14 and the condenser are installed in a machine room provided at the lower back of the refrigerator body 1. The evaporator 15 is installed in a cooler room provided behind the freezing rooms 3 and 4, and a blower fan 16 is installed above the evaporator 15 in the cooler room.

  The cold air cooled by the evaporator 15 is sent to each storage room such as the refrigerator compartment 2, the freezer compartments 3, 4 and the vegetable compartment 5 by the blower fan 16 through a cold air passage (not shown). Specifically, a part of the cold air sent by the blower fan 16 is sent to a storage room in the refrigeration temperature zone of the refrigeration room 2 and the vegetable room 5 via a damper that can be opened and closed. The section is sent to the storage room of the freezing temperature zone of the freezing rooms 3 and 4.

  The cold air sent to the respective storage rooms of the refrigerator compartment 2, the freezer compartments 3, 4 and the vegetable compartment 5 by the blower fan 16 is cooled to the respective storage compartments and then returned to the cooler compartment through the cold air return passage. . Thus, the refrigerator which becomes this Embodiment has the circulation structure of cold air, and maintains each store room 2-5 at a suitable temperature.

  Moreover, in the refrigerator compartment 2, the multistage shelf 17-20 comprised with a transparent resin board is installed so that removal is possible. The lowermost shelf 20 is installed so as to be in contact with the back surface and both side surfaces of the inner box 12 and divides a so-called lowermost space 21, which is a lower space, from the upper space. Further, a plurality of door pockets 25 to 27 are installed inside each refrigerator compartment door 6, and these door pockets 25 to 27 protrude into the refrigerator compartment 2 with the refrigerator compartment door 6 being closed. It is provided as follows. A back panel 30 that forms a passage through which the cool air supplied from the blower fan 16 passes is provided on the back of the refrigerator compartment 2.

  As is apparent from FIG. 2, the lowermost space 21 is, in order from the left, an ice-making water tank 22 for supplying ice-making water to the ice-making tray in the freezer compartment 3, and a storage case for storing food such as desserts. 23, low-pressure chambers 24 are provided for maintaining the freshness of food and storing it for a long period of time by reducing the pressure inside the chamber. The low-pressure chamber 24 has a width that is narrower than the width of the refrigerator compartment 2, and is disposed adjacent to the side surface of the refrigerator compartment 2. As is clear from the drawing, the low-pressure chamber 24 is surrounded by walls and doors so as to be airtight, so that the internal atmospheric pressure can be lowered from the outside.

  The ice making water tank 22 and the storage case 23 are arranged behind the refrigerator compartment door 6 (FIG. 1) on the left side of FIG. Thereby, the ice making water tank 22 and the storage case 23 can be pulled out only by opening the left refrigerator compartment door 6. Further, the low pressure chamber 24 is disposed behind the refrigerator compartment door 6 on the right side of the drawing. Thereby, the food tray 60 of the low pressure chamber 24 can be pulled out only by opening the right refrigerator compartment door 6. In FIG. 1, the ice making water tank 22 and the storage case 23 are located behind the door pocket 27 at the lowest stage of the refrigerator compartment door 6, and the low pressure chamber 24 is also provided in the refrigerator compartment door 6. It will be located behind the lowermost door pocket 27.

  Next, details of the rear panel 30 shown in FIG. 1 will be described with reference to FIG. The rear panel 30 includes a cold air discharge port (first cold air discharge port) 31 for supplying cold air to the refrigerating chamber 2 and a low pressure chamber cooling for supplying cold air to the lowermost space 21 of the refrigerating chamber 2. A cold air discharge port (second cold air discharge port) 32 and a cold air return port 33 are provided. The cold air return port 33 is provided on the back side of the low pressure chamber 24 on the side close to the side surface of the refrigerator compartment 2.

  The cool air discharge port 32 is provided toward the gap between the upper surface of the low-pressure chamber 24 and the lower surface of the shelf 20. The cold air discharged from the cold air discharge port 32 flows through the gap between the upper surface of the low-pressure chamber 24 and the lower surface of the shelf 20, and cools the low-pressure chamber 24 from the upper surface. Accordingly, the inside of the low pressure chamber 24 is indirectly cooled.

  Further, a damper device 41 for controlling the flow of cold air into the low pressure chamber 24 is provided upstream of the cold air discharge port 32. The opening and closing of the damper device 41 is controlled by a control device (not shown), and thereby the amount of cold air supplied to the low pressure chamber 24 is controlled.

  Furthermore, as shown in FIG. 1, in order to raise the temperature in the low pressure chamber 24, for example, a heater 43 is provided. The heater 43 is provided on the lower projection surface in the low-pressure chamber 24. In this example, the heater 43 has a substantially same area as the bottom surface in the low-pressure chamber 24.

  Here, the low pressure chamber 24 is disposed close to the right side surface of the refrigeration chamber 2 to eliminate the gap on the right side of the low pressure chamber 24, and a shelf (partition wall) (not shown) is provided at the left end of the upper surface of the low pressure chamber 24. Since the gap on the left side of the low pressure chamber 24 is eliminated, the cold air discharged from the cold air discharge port 32 flows on the upper surface of the low pressure chamber 24 without being diverted to the left and right sides of the low pressure chamber 24. Thus, the inside of the low pressure chamber 24 can be cooled quickly by increasing the amount of cool air that cools the upper surface of the low pressure chamber 24. The cool air that has cooled the upper surface of the low pressure chamber 24 is sucked into the cool air return port 33 from the front of the low pressure chamber 24 through the left side surface of the low pressure chamber 24, and returned to the cooler chamber through the cool air return passage. Since the cold air return port 33 is provided on the rear side of the low pressure chamber 24 and on the side close to the side surface of the refrigerator compartment 2, the cold air comes into contact with the rear surface and the left side surface of the low pressure chamber 24 to cool it.

  In this way, the low pressure chamber 24 is indirectly cooled by the cold air passing through the outside thereof. Therefore, by reducing the convection of the cold air by reducing the pressure, and by indirect cooling in the sealed container, against the effects of on / off of the compressor, and the temperature rise such as opening and closing of the refrigerator door and defrosting However, the adverse effect on the internal temperature can be suppressed, so that a constant temperature and high humidity state can be maintained. The cold air that has cooled the entire refrigerator compartment 2 is also sucked into the cold air return port 33.

  An ice making water pump 28 is installed behind the ice making water tank 22. A negative pressure pump 29, which is an example of a decompression device for decompressing the low pressure chamber 24, is disposed behind the storage case 23 and in a space behind the low pressure chamber 24. The negative pressure pump 29 is in contact with a pump connection portion provided on the side surface of the low pressure chamber 24 via a conduit.

  Further, as shown in FIG. 2, the low-pressure chamber 24 described above includes a box-shaped low-pressure chamber body 40 having an opening for taking in and out food (opening-out opening for food), and the food in and out of the low-pressure chamber main body 40 The low-pressure chamber door 50 that opens and closes the opening for food use, and the food tray 60 that accommodates food in the interior and passes the low-pressure chamber door 50 into and out of the low-pressure chamber. That is, in the low-pressure chamber main body 40, the space surrounded by the low-pressure chamber main body 40 and the low-pressure chamber door 50 is formed as a low-pressure space that is depressurized by closing the food loading / unloading opening of the low-pressure chamber door 50. The food tray 60 is attached to the back side of the low pressure chamber door 50 and can be moved back and forth as the low pressure chamber door 50 moves.

  The low pressure chamber 24 is placed in a closed state by placing food on the food tray 60 and closing the low pressure chamber door 50. Further, the door switch is turned on and the negative pressure pump 29 is driven, and the low pressure chamber 29 is driven. 24 is depressurized to a state lower than atmospheric pressure. Thereby, the oxygen concentration in the store room 13 can fall and deterioration of the nutrient component in a foodstuff can be prevented.

  Then, by pulling the low-pressure chamber door 50 forward, first, the pressure release valve provided in a part of the low-pressure chamber door 50 is operated to release the low-pressure chamber 24 from the reduced pressure state. The low pressure chamber door 50 can be opened due to the atmospheric pressure. As a result, the low pressure chamber door 50 can be easily opened and food can be taken in and out.

  In addition, a low-pressure chamber temperature sensor 38 for detecting the temperature of the low-pressure chamber 24 is attached to the outer surface of the low-pressure chamber 24, and the low-pressure chamber 24 is accurately maintained at a predetermined temperature by being combined with a temperature control device described later. Can do. Further, the back panel 30 is provided with a refrigerator temperature sensor 39, and the temperature in the refrigerator compartment 2 can be accurately controlled by detecting the temperature in the refrigerator compartment 2. Although not shown in the drawings, the freezer compartment 4 and the vegetable compartment 5 are similarly equipped with temperature sensors and used for accurate temperature control.

  Next, details of the food detection means in the present invention will be described with reference to FIGS. FIG. 4 shows a measurement of the change over time in the carbon dioxide concentration in the low-pressure chamber 24 shown in FIG. 2 using a carbon dioxide sensor. 201 shows a change in the carbon dioxide sensor value when 600 g of spinach is stored. 202 shows the change of the carbon dioxide sensor value when 200g of spinach is stored. Reference numeral 203 denotes a change in the carbon dioxide sensor value when three packs with three slices of salmon fillet are stored on a styrofoam tray sold in a supermarket. Under each condition, the empty state was measured until 1 minute passed from the measurement, and after 1 minute, the food was stored and the change in the carbon dioxide sensor was measured. As can be seen from FIG. 4, when the spinach is stored in the low-pressure chamber 24, the carbon dioxide concentration increases with time. On the other hand, salmon fillets show no increase in carbon dioxide. Vegetables are constantly exhaling carbon dioxide due to respiration, and there is no photosynthesis in a dark sealed space like the low-pressure chamber 24, and there is no diffusion outside the container, so the concentration of carbon dioxide increases with time. is there. On the other hand, foods other than vegetables such as salmon fillets do not produce carbon dioxide as indicated by 203 in FIG. Therefore, if this is utilized, the distinction between vegetables and meat fish can be made.

  Next, the location of the gas type / concentration detection means will be described with reference to FIG. FIG. 5 is a cross-sectional view of the negative pressure pump 29 shown in FIG.

  The main body of the negative pressure pump 29 is composed of an electric motor 61, a movable arm 62 with an eccentric cam, a diaphragm 63 connected to the movable arm 62 and moving up and down, a diaphragm case 64 for fixing the diaphragm 63, a diaphragm 63 and a diaphragm case 64. Pump chamber 65, and a pressure sensor 66 for detecting the pressure in the pump chamber 65. The diaphragm case 64 has an intake port (not shown) and an exhaust port 67, and has an intake valve (not shown) and an exhaust valve 68 for controlling the flow of air, respectively. An intake port (not shown) is connected to the low pressure chamber 24 by a tube 69. When the electric motor 61 is operated and the diaphragm 63 moves up and down via the movable arm 62, a low pressure is supplied from the intake port (not shown). The air in the chamber 24 is sucked and exhausted from the exhaust port 67.

  The storage case 70 for storing the negative pressure pump 29 is composed of an upper case 70a and a lower case 70b. The upper case 70a and the lower case 70b are fixed with screws so that the inside of the storage case 70 is substantially sealed. Yes.

  The anti-vibration rubber 71 is attached to the negative pressure pump 29, and the anti-vibration rubber 71 is sandwiched between the upper case 70a and the lower case 70b of the storage case 70 so that the anti-vibration rubber 71 holds the storage case. It is attached so as to be suspended from 70. As a result, it is possible to suppress the vibration generated when the electric motor 61 of the negative pressure pump 29 is operated from being propagated to the storage case 70 and the refrigerator main body 1 and to reduce the vibration and noise generated from the refrigerator to the outside. It is.

  Reference numeral 72 denotes a substrate on which gas detection means is mounted, and 73 denotes a gas detection means. As described above, since the substrate 72 is away from the negative pressure pump 29 and is not directly affected by vibration, the reliability of the substrate 72 and the carbon dioxide sensor 73 due to long-term use can be improved. Here, the gas detection means 73 will be described as a carbon dioxide sensor. In general, it is most easy to detect the gas detection means in the low pressure chamber 24 closest to the food, but the low pressure chamber 24 needs to maintain hermeticity to maintain a low pressure. In order to extend the wiring from the low-pressure chamber 24 to the outside of the low-pressure chamber 24, a hole through which the wiring passes is necessary, and the low-pressure state in the low-pressure chamber 24 cannot be maintained by the hole. It is necessary to add parts to prevent inflow, which may increase costs and decrease reliability. Therefore, the air in the low-pressure chamber exhausted from the negative pressure pump 29 is brought into contact with the gas detection means.

  As shown in FIG. 5, the exhaust port of the negative pressure pump 29 is in the storage case 70, and when the electric motor 61 is operated and air in the low pressure chamber 24 is sucked, the air in the low pressure chamber 24 is stored in the storage case 70. Will be released inside. The upper case 70a and the lower case 70b of the storage case 70 are fixed with screws, but a seal member such as rubber packing is not interposed between them, and a minute gap through which air escapes is opened. Therefore, when the air in the low pressure chamber 24 is released into the storage case 70, the air originally contained in the storage case 70 is discharged out of the storage case 70 through the gap, and the air in the low pressure chamber 24 is stored in the storage case. 70 will be filled. Accordingly, since the air in the low pressure chamber 24 comes into contact with the carbon dioxide sensor 73 installed in the storage case 70, it is possible to detect the carbon dioxide generated in the low pressure chamber 24.

  Since the carbon dioxide sensor 73 shown in FIGS. 5 and 6 has a cylindrical shape, the exhaust port of the negative pressure pump is processed to have a slightly larger inner diameter than the outer circumference of the carbon dioxide sensor as shown in FIG. By using a structure in which a part of the carbon dioxide sensor is placed in the exhaust port of the pressure pump, carbon dioxide can be detected more efficiently.

  Next, the temperature switching control means in the refrigerator of the present invention will be described with reference to FIG. FIG. 7 is a control block diagram showing a schematic configuration of the control means of the refrigerator in the present embodiment.

  In the figure, for example, a temperature control device 80 constituted by a microcomputer or the like determines the type of food detected by the carbon dioxide sensor 73 that detects the carbon dioxide concentration inside the low pressure chamber 24 and the temperature of the low pressure chamber 24. As an input, the temperature of the low-pressure chamber 24 detected by the low-pressure chamber temperature sensor 38 to be detected and the temperature set by the temperature adjustment unit 81 that can switch between the ice temperature temperature zone and the refrigerator temperature zone, That is, control signals to the damper device 41 and the heater 43 are output based on those temperatures.

  More specifically, when the value detected by the carbon dioxide sensor 73 is high, the amount of cold air is controlled (suppressed) by reducing the opening degree of the damper device 41 or by closing it completely. When the temperature becomes too low, the heater 43 is energized to increase the temperature. This is because when the detection value of the carbon dioxide sensor 73 is high, there is a high possibility that a large amount of vegetables are stored in the low pressure chamber 24, so that the temperature is raised and the vegetables are prevented from freezing. When the detection value of the carbon dioxide sensor 73 is low or not, the opening degree of the damper device 41 is increased, and thus cold air is supplied to the cold air circulation space in the low pressure chamber 24 to lower the temperature in the low pressure chamber 24. . If the detection value of the carbon dioxide sensor 73 is low or not, there is a high possibility that there are no vegetables in the low-pressure chamber 24 and a lot of meat fish are stored, so the temperature is lowered as is generally done. This is to keep the meat fish in good storage condition. The temperature control based on the detection value of the carbon dioxide sensor 73 is not limited to the two steps as described above. The intermediate region can be set or controlled steplessly according to the value of the detection value of the carbon dioxide sensor 73 Also good.

  Further, in the case of each temperature setting, it is possible to know the difference between the set temperature and the current low-pressure chamber 24 temperature by detecting the temperature of the low-pressure chamber 24 with the low-pressure chamber temperature sensor 38. By controlling the damper device 41 and the heater 43 so as to reduce the temperature, it is possible to perform temperature control with good accuracy and without delay.

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 21 Lowermost stage space 24 Low pressure chamber 28 Ice-making water pump 29 Negative pressure pump 38 Low pressure chamber temperature sensor 39 Cold room temperature sensor 40 Low pressure chamber main body 41 Damper device 43 Heater 44 Temperature control part 45 Control device 50 Low pressure chamber door 60 Food Tray 61 Electric motor 62 Movable arm 63 Diaphragm 64 Diaphragm case 65 Pump chamber 66 Pressure sensor 67 Exhaust port 68 Exhaust valve 69 Tube 70 Storage case 70a Upper case 70b Lower case 71 Anti-vibration rubber 72 Substrate 73 Gas detection means (carbon dioxide sensor)

Claims (5)

A refrigerator comprising a storage chamber and a decompression unit that decompresses the gas in the storage chamber by discharging the gas out of the storage chamber, wherein at least a kind, a concentration, and a temperature of the gas exhausted from the storage chamber by the decompression unit A detecting means for detecting either of them ;
The refrigerator is characterized in that the decompression means is housed in a container, and the detection means is installed at a position not in contact with the decompression means in the container .   2. The refrigerator according to claim 1, further comprising control means for controlling the temperature of the storage room based on at least one of the type, concentration and temperature of the gas detected by the detection means. It said pressure reducing means is characterized in that it is placed via a cushioning member that absorbs vibration generated from the decompression means to the container, refrigerator of claim 1, wherein. It said temperature detecting means for detecting the temperature of the gas out of the sensing means, characterized in that the provided et the outer surface of the storage compartment, the refrigerator according to claim 1, wherein. The refrigerator according to any one of claims 1 to 4 , wherein the means for detecting at least one of the type and concentration of gas among the detection means is a carbon dioxide sensor .