JP2006308232A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator having an odorless vegetable chamber while preventing the rise of temperature in the refrigerator and a decrease in the total moisture content by allowing discharge of moisture at a comparatively low temperature. <P>SOLUTION: A humidifier 800 enclosed in a box body 810 is installed. The box body 810 is partitioned by a partition wall 840 into an adsorption chamber 820 with an adsorption side fan 52 installed communicating with the outside of the refrigerator, and a desorption chamber 830 with a desorption side fan 53 installed communicating with the vegetable chamber 300, and a desiccant rotor 50 is installed to straddle them. Moisture in air outside the refrigerator adsorbed in the adsorption chamber 820 is desorbed by air in the refrigerator in the desorption chamber 830 to humidify the vegetable chamber 300. The desiccant rotor 50 is composed of a silicon material provided with a large number of pores with a pore diameter of 1.5-2.5 nm and shows a characteristic rapidly increased in the equilibrium amount of adsorption when relative humidity varies from 30% to 40%. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a refrigerator, and more particularly to a refrigerator having a function of adjusting the humidity of the air in the cabinet.

  In food storage in a home refrigerator, keeping the interior at high humidity is effective for maintaining freshness. For example, if cakes and side dishes are stored in a high-humidity environment, the amount of water evaporated from food can be suppressed, and it is easy to wrap or seal it in a tapper while maintaining deliciousness and freshness for a long time. Save and save consumables. Further, if vegetables are stored in a high humidity environment, the transpiration of moisture in the vegetables can be suppressed, so that the freshness of the vegetables can be maintained for a long time.

Therefore, as an invention for adjusting the humidity of a refrigerator room (hereinafter referred to as “vegetable room”) for storing cakes, side dishes or vegetables in a household refrigerator,
(I) A porous and hydrophilic moisture permeable plate is installed to absorb and release moisture (for example, see Patent Document 1),
(II) A tempered member made of porous silica is installed in a vegetable room to prevent condensation and maintain a high humidity state (for example, see Patent Document 2),
(III) Defrosted water generated from the heat exchange cooler during defrosting during refrigerator operation is collected, discharged as fine water droplets with an ultrasonic humidifier, and humidified in the vegetable case (for example, patents) Reference 3) is disclosed.

Japanese Patent Laying-Open No. 2003-28555 (5th page, FIG. 9) JP 2000-274924 A (page 3-4, FIG. 1) Japanese Patent Laid-Open No. 6-257933 (page 3, FIG. 1)

  (I) However, in the invention disclosed in Patent Document 1, since the cooling air passage and the interior are in communication even when the door is closed, the moisture moves to a portion other than the vegetable compartment or a cooler, and the moisture content of the vegetable compartment There was a problem that decreased. Furthermore, there is a problem that moisture may be diffused into an infinite space by opening and closing the door. Moreover, even if it called moisture release in a refrigerator, there was a problem that only the water | moisture content of vegetables itself was reused and the whole moisture content in a warehouse did not increase. Further, even in the radiation cooling used in recent years, there is a problem that there is a space connected to the cooler and moisture is reduced.

  (Ii) Further, in the invention disclosed in Patent Document 2, since the moisture release temperature is high in porous silica, there is a problem that moisture is hardly released when the vegetable compartment is cooled to a low temperature of 0 to 10 ° C. there were. For this reason, even when trying to actively humidify, it is necessary to raise the ambient air temperature, so the rise in ambient air temperature will cause the temperature inside the refrigerator to rise, and humidification using this method is adopted There was a problem that it was difficult to do.

  (Iii) Furthermore, in the invention disclosed in Patent Document 3, since it is a system that uses defrosted water, there has been a problem that it is necessary to provide a reservoir tank or the like for storing defrosted water. In addition, there is a problem that the odor of food or the like is transferred to the cold air in the freezer, and the odor is also transferred to defrosted water.

  The present invention has been made in view of the above, and by preventing the release of moisture at a relatively low temperature, it is possible to prevent an increase in internal temperature and a decrease in the total moisture content, and a vegetable without odor. It aims at providing the refrigerator which comprises a room.

  The refrigerator according to the present invention includes an air cooling means for cooling the internal air, a refrigerating room to which the internal air cooled by the air cooling means is supplied, a circulation air passage and a circulation blower for circulating the internal air, And a desiccant rotor that adsorbs moisture contained in outside air and desorbs the moisture into the refrigerator compartment.

  In the refrigerator according to the present invention, a desiccant rotor is installed in a refrigerating room, and the desiccant rotor adsorbs moisture contained in the outside air and releases the moisture into the refrigerating room (hereinafter referred to as “desorption”). Since the internal air is humidified, a reduction in the total amount of water in the refrigerator compartment is prevented, and a refrigerator compartment with no odor is obtained, so a refrigerator equipped with a refrigerator compartment suitable for long-term storage of foods such as vegetables is provided. Obtainable. In addition, the solid adsorbent included in the desiccant rotor has pores with a hole diameter of 1.5 to 2.5 nanometers, for example, with an equilibrium adsorption rate that fluctuates rapidly in a relative humidity range of 30% to 40%. If constituted by a large number of silicon materials, desorption can be performed at a relatively low temperature, so that an increase in the internal temperature of the refrigerator compartment can be prevented and an energy saving effect can be obtained.

[Embodiment 1]
FIG. 1 is an external perspective view illustrating a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view of the refrigerator shown in FIG. FIG. 3 is a cross-sectional view of the humidifier (desiccant rotor) installed in the refrigerator shown in FIG. FIG. 4 is an equilibrium adsorption diagram showing the adsorption characteristics of the desiccant rotor installed in the refrigerator shown in FIG. In the following description, the same or corresponding parts are denoted by the same reference numerals, and a part of the description is omitted.

(refrigerator)
1 and 2, the refrigerator 1000 is an example of a total capacity of 450 L (liters) class. The refrigerator 1000 and the switching room are arranged from the top to the bottom inside the casing surrounded by the heat insulating material. 400, ice making room 500, vegetable room 300, freezing room 200, and blower room 600 are arranged. Furthermore, an air cooling means 700 for cooling the air inside the casing (hereinafter referred to as “inside air”) and a humidifying device 800 for increasing the humidity of the vegetable room 300 are installed.

(Refrigerator room)
The refrigerator compartment 100 has a capacity of 240 L and stores food at about 0 to 10 ° C., and includes a refrigerator compartment opening / closing door 101.
The freezer compartment 200 has a capacity of 90 L, and stores food frozen in a freezing temperature zone (about −16 to −22 ° C.). A freezing case 210 is installed and a drawer door 201 is provided.
The vegetable room 300 has a capacity of about 90 L, is provided with a drawer door 301, is provided with a fruit case 310 and a vegetable case 320, and can arrange and store food such as vegetables. Moreover, the vegetable room humidity sensor 21 is installed, and it is adjusted to high humidity at about 3-10 degreeC (this is demonstrated in detail separately).

The switching chamber 400 has a freezing temperature range (about −16 to −22 ° C.), a chilled temperature range (about −2 to + 2 ° C.), a refrigeration temperature range (about 0 to 5 ° C.), and a vegetable temperature range (about 3 to 10 ° C.). ), Etc., a switching case 410 is installed, and a drawer door 401 is provided.
The ice making chamber 500 stores ice produced by producing ice, and includes a drawer door 501.

(Blower room)
The blower chamber 600 is a space on the rear side (right side in FIG. 2) of the casing partitioned by the partition wall 601, and the circulation fan 13 (hereinafter referred to as “circulation fan 13”) for circulating the internal air therein. ”), A cooler 12 constituting the air cooling means 700, and a defrosting heater 16 are arranged.

  A refrigerating room air passage 610 provided with a refrigerating room opening / closing valve 611 is provided between the air blowing room 600 and the refrigerating room 100, and a switching room opening / closing valve 641 is provided between the air blowing room 600 and the switching room 400. The switching chamber air passage 640 is divided into a freezer compartment air passage 620 between the blower chamber 600 and the freezer compartment 200, and an upper return air passage 604 is formed in the gap between the partition wall 601 and the rear surface 402 of the switching chamber 400. A middle return air passage 603 and a lower return air passage 612 communicating with the air passage 603 and reaching the cooler 12 are formed in the gap between the wall 601 and the back surface 302 of the vegetable compartment 300, respectively. A circulation air passage (indicated by a white arrow in the figure) is formed. Note that a flow rate adjusting valve may be installed in place of the refrigerating room opening / closing valve 611 and the switching room opening / closing valve 641.

(Air cooling means)
The air cooling means 700 executes a known refrigeration cycle, and includes a cooler 12 installed in the blower chamber 600 and a compressor 22 installed outside the casing. When frost adheres to the cooler 12, a defrosting heater 16 for removing the frost is provided in parallel with the cooler 12, and a drain pipe 18 for discharging the melted frost to the outside of the housing is installed. Yes.
Moreover, the heat radiating pipe 20 through which the refrigerant (about 35 ° C.) ° C. connected to the heat radiating means flows is arranged in the top surface 303 of the vegetable room 300.

(Refrigerator operation)
Next, the operation of the refrigerator will be described. Cooled internal air (hereinafter sometimes referred to as “cold air”) generated by the cooler 12 is circulated through a circulation air passage by a circulation fan 13. That is, the temperature of each room air is detected by temperature sensors (not shown) provided in the refrigerating room 100 and the switching room 400, and the refrigerating room opening / closing valve 611 and the switching room opening / closing valve are set so that the detected temperature becomes a set temperature. 641 is opened and closed.

  The cool air sent into the refrigerating room 100 by the circulation fan 13 cools the inside of the refrigerating room 100 and then flows into the upper return air passage 604 on the back side of the switching chamber 400, and passes through the middle return air passage 603 and the lower return air passage 612. Via, it returns to the cooler 12 again. At this time, a part of the circulated cold air enters the vegetable room 300 through the vegetable room air passage 304 provided on the top surface 303 and the back surface 302 of the vegetable room 300, cools the vegetable room 300, and is not shown in the drawing. 2 Flows out to the central return air passage 603 via the vegetable room air passage.

  When the cooler 12 cools the internal air, moisture contained in the air becomes frost and adheres to the cooler 12. If the cooler 12 is frosted, heat transfer between the internal air and the cooler 12 is hindered by the frost, and the internal air becomes difficult to cool. Therefore, the defrosting heater 16 is energized and the frost adhered to the cooler. Is removed. The melted frost is guided to the water collection container 19 outside the casing through the drain pipe 18 and is evaporated in the atmosphere in the water collection container 19.

(Humidifier)
FIG. 3 is a cross-sectional view of the humidifying device installed in the refrigerator shown in FIG. In FIG. 3, the humidifying device 800 is housed in a box 810 provided on the vegetable room top surface 303 of the vegetable room 300 and disposed in the recess 305, and the box 810 is divided into an adsorption chamber 820 and a desorption chamber 830. It is partitioned by 840. The desiccant rotor 50 is rotatably installed so as to straddle the adsorption chamber 820 and the desorption chamber 830. That is, the desiccant rotor 50 passes through the partition 840 and is rotated by the motor 51 with a rotating shaft substantially parallel to the partition 840.

  An adsorption side intake port 55 and an adsorption side exhaust port 56 are provided on the front surface 801 of the adsorption chamber 820, and the inside of the adsorption chamber 820 communicates from the adsorption side intake port 55 to the upper surface side of the desiccant rotor 50 by an adsorption chamber partition plate 850. Adsorption side intake air passage 821 (shown by solid line arrows in the figure) and adsorption side exhaust air passage 822 (shown by broken line arrows in the figure) from the lower surface side of the desiccant rotor 50 to the adsorption side exhaust port 56. ) Is formed. An adsorption-side fan 52 that intakes and exhausts outside air is installed in the adsorption-side intake air passage 821.

  Further, a desorption side intake port 57 and a desorption side exhaust port 58 are provided on the bottom surface 802 of the desorption chamber 830, and the inside of the desorption chamber 830 is desorbed from the desorption side intake port 57 by the desorption chamber partition plate 860, on the lower surface side of the desiccant rotor 50. And a desorption side exhaust air path 832 extending from the upper surface side of the desiccant rotor 50 to the desorption side exhaust port 58. In the desorption side intake air path 831 (indicated by a broken line arrow in the figure), an electric heater 54 for heating the internal air is attached to the desorption side exhaust air path 832 (indicated by a solid line arrow in the figure). Is provided with a desorption side fan 53 for sucking and exhausting air in the cabinet.

(Desiccant rotor)
FIG. 4 is an adsorption diagram showing the equilibrium adsorption characteristics of the desiccant rotor installed in the humidifier shown in FIG. In FIG. 4, the horizontal axis represents relative humidity, and the vertical axis represents the equilibrium adsorption amount. In addition, the ratio of the water vapor pressure detected with respect to the saturated water vapor pressure as the relative humidity, and the equilibrium adsorption amount indicate the water adsorption amount (kg) per unit weight (1 kg) of the solid adsorbent forming the desiccant rotor 50.
That is, the desiccant rotor 50 used in Embodiment 1 is made of a silicon material provided with a large number of pores having a hole diameter of 1.5 to 2.5 nanometers, and the relative humidity changes from 30% to 40%. In this case, the equilibrium adsorption amount shows a characteristic that increases rapidly from, for example, 0.1 kg / kg to 0.4 kg / kg. Although the value of the equilibrium adsorption amount can be changed by the manufacturing method of the desiccant rotor 50, the characteristic that the equilibrium adsorption amount greatly increases in the range of about 30% to about 40% relative humidity does not change.

(Operation of desiccant rotor)
FIG. 5 is a moist air diagram illustrating the operation of the desiccant rotor of FIG. In FIG. 5, the suction side fan 52 and the desorption side fan 53 are driven by the difference between the humidity detected by the vegetable room humidity sensor 21 installed in the vegetable room 300 and a preset humidity, and an electric heater is used. 54 is controlled to heat the internal air (more precisely, the air in the vegetable compartment 300).

(adsorption)
In the adsorption chamber 820 of the humidifier 800, the outside air at a temperature of 25 ° C. and a relative humidity of 60% (absolute humidity 0.012 kg / kg) is sucked into the adsorption side intake air passage 821 from the adsorption side intake port 55, and the desiccant rotor. Water is adsorbed by the isenthalpy change when passing through 50, and dehumidified to 32.0 ° C. and a relative humidity of 30% (absolute humidity 0.009 kg / kg). Then, the air is again exhausted from the suction side exhaust port 55 to the outside via the suction side exhaust air passage 822.
Since the desiccant rotor 50 is rotated at a rotational speed of about 5 to 20 rpm by the motor 51, the specific position of the desiccant rotor 50 alternates between the adsorption chamber 820 and the desorption chamber 830. That is, the specific position of the desiccant rotor 50 moves to the desorption chamber 830 while adsorbing moisture contained in the outside air while staying in the adsorption chamber 820.

(Desorption)
In the desorption chamber 830 of the humidifier 800, the internal air of 10 ° C., relative humidity of about 90% (absolute humidity 0.007 kg / kg), and enthalpy 27.3 kJ / kg is desorbed from the desorption side intake port 57. 831 and heated by the electric heater 54 to 27.5 ° C., about 30% (absolute humidity 0.007 kg / kg), and enthalpy 45.1 kJ / kg. Then, it flows into the desiccant rotor 50 in this state.
At this time, moisture stored in the desiccant rotor 50 (moisture adsorbed in the adsorption chamber 820) moves (desorbs) to the passing air side. That is, the air in the warehouse that has passed through the desiccant rotor 50 is humidified to 21 ° C. and about 60% (absolute humidity 0.009 kg / kg), and is connected to the vegetable compartment from the desorption side exhaust port 58 via the desorption side exhaust air passage 832. 300 is exhausted.

On the other hand, the part after the removal of the desiccant rotor 50 moves to the adsorption chamber 820 again.
When the flow rate of outside air passing through the desiccant rotor 50 in the adsorption chamber 820 is 0.0002 kg / second, the adsorption amount is 21 g / hour, and the flow rate of the internal air passing through the desiccant rotor 50 in the desorption chamber 830 is In the case of 0.0003 kg / second, the desorption amount (humidification amount) is 3.6 g / hour. The heater input on the detachable side is calculated with the heater efficiency as 100%. It is obtained by multiplying the air flow rate of 0.0003 kg / sec by the enthalpy difference of 17.8 kJ / kg (= 45.1 kJ / kg-27.3 kJ / kg), and is calculated to be about 5.3 W. Further, the passing air volume is adjusted so that the amount of moisture movement is the same on the adsorption side and the desorption side. Further, the humidification amount may be controlled by adjusting the ratio of the passing area or adjusting the rotational speed of the desiccant rotor.

In the refrigerator 1000 provided with the humidifying device 800 according to the first embodiment configured as described above, moisture is taken in from the air outside the refrigerator, and the moisture-containing air is released into the vegetable compartment 300. The interior of the chamber 300 can be high humidity. Therefore, since it is possible to prevent the transpiration of the vegetables when the humidity is kept high, there is an effect of enabling long-term preservation of the vegetables.
In addition, since the desiccant rotor 50 has a characteristic that enables desorption at a relative humidity of 30%, the desiccant rotor 50 is desorbed by relatively low temperature air. Therefore, even if the electric heater 54 is used for humidification, It hardly raises the air inside the vegetable compartment 300 and is suitable for energy saving.
In the above, moisture is taken into the vegetable compartment from outside the refrigerator with the desiccant rotor's adsorption side set to the vegetable compartment side and the desorption side outside the refrigerator. May be operated so as to be discharged out of the refrigerator.

[Embodiment 2]
FIG. 6 is a cross-sectional view of the humidifier (desiccant rotor) in the refrigerator according to Embodiment 2 of the present invention as seen from the top of the vegetable compartment. In addition, the same code | symbol is attached | subjected to this same part as Embodiment 1 (FIG. 3), and one part description is abbreviate | omitted. In FIG. 5, the humidifying device 900 is configured by disposing the heat radiating pipe 20 in the desorption side intake air passage 831 instead of the electric heater 54 in the humidifying device 800 of the first embodiment.

  Therefore, as in the refrigerator of the first embodiment, the vegetable room can be humidified, and the desiccant is obtained by utilizing the heat of the heat radiating pipe 20 that is a condenser constituting the air cooling means 700 (same as the refrigeration cycle). Since the internal air for removing and attaching the rotor 50 is heated, the energy saving effect by reducing the power consumption for heating the heater, the reduction of the manufacturing cost by reducing the number of members constituting the refrigerator, the simple structure An effect such as conversion can be obtained.

[Embodiment 3]
FIG. 7 is a longitudinal sectional view for explaining a refrigerator according to Embodiment 3 of the present invention. The same parts as those in Embodiment 1 (FIG. 2) are denoted by the same reference numerals, and a part of the description is omitted. In FIG. 7, a refrigerator 3000 has a humidifier 800 installed at the top of the vegetable compartment 300, the suction side intake port 55 and the suction side exhaust port 56 open to the humidity control air channel 308, and the humidity control air channel 308 is It communicates with the middle return air passage 603 (the gap between the partition wall 601 and the back surface 302 of the vegetable compartment 300). Accordingly, the air inside the refrigerator compartment 100 that has passed through the refrigerator compartment 100 is sucked into the adsorption chamber 820 of the humidifying device 800, and the moisture contained in the air inside the refrigerator is released to the vegetable compartment 300, thereby making the inside of the vegetable compartment 300 high humidity. it can.

(Refrigerator operation)
Next, the operation of the refrigerator will be described. Cooled internal air (hereinafter sometimes referred to as “cold air”) generated by the cooler 12 is circulated through a circulation air passage by a circulation fan 13. That is, the temperature of each room air is detected by temperature sensors (not shown) provided in the refrigerating room 100 and the switching room 400, and the refrigerating room opening / closing valve 611 and the switching room opening / closing valve are set so that the detected temperature becomes a set temperature. 641 is opened and closed.

  The cool air sent into the refrigerating room 100 by the circulation fan 13 cools the inside of the refrigerating room 100 and then flows into the upper return air passage 604 on the back side of the switching chamber 400, and passes through the middle return air passage 603 and the lower return air passage 612. Via, it returns to the cooler 12 again. At this time, since the humidity conditioning air passage 308 is not in communication with the vegetable compartment 300, the circulating cold air does not flow into the vegetable compartment 300 even if it flows into the humidity conditioning air passage 308. The air is cooled by radiation from the surroundings, and the moisture in the vegetable compartment 300 is adjusted by the desiccant rotor.

  When the cooler 12 cools the internal air, moisture contained in the air becomes frost and adheres to the cooler 12. If the cooler 12 is frosted, heat transfer between the internal air and the cooler 12 is hindered by the frost, and the internal air becomes difficult to cool. Therefore, the defrosting heater 16 is energized and the frost adhered to the cooler. Is removed. The melted frost is guided to the water collection container 19 outside the casing through the drain pipe 18 and is evaporated in the atmosphere in the water collection container 19.

(Operation of desiccant rotor)
Since the operation of the desiccant rotor 50 in the third embodiment is the same as that in the first embodiment, the description thereof is omitted. Further, since the refrigerator compartment 100 frequently opens and closes the refrigerator compartment opening / closing door 101, moisture from the outside air having humidity is always taken in, so that the vegetable compartment 300 can be continuously humidified.

(adsorption)
FIG. 8 is a moist air diagram illustrating the operation of the desiccant rotor of FIG. In FIG. 8, in the adsorption chamber 820 of the humidifier 800, the air in the middle return air passage 603 after passing through the refrigerator 100 is at a temperature of 5 ° C. and a relative humidity of 80% (absolute humidity 0.0047 kg / kg). Then, the moisture is adsorbed by the change in the enthalpy that is sucked into the adsorption side intake air passage 821 from the adsorption side intake port 55 via the humidity adjustment air passage 308 and passes through the desiccant rotor 50, and 6.2. Dehumidified to 0 ° C. and a relative humidity of 30% (absolute humidity 0.0017 kg / kg). Then, the air is again exhausted from the adsorption side exhaust port 55 to the middle return air path 603 via the adsorption side exhaust air path 822.
Since the desiccant rotor 50 is rotated at a rotational speed of about 5 to 20 rpm by the motor 51, the specific position of the desiccant rotor 50 alternates between the adsorption chamber 820 and the desorption chamber 830. That is, the specific position of the desiccant rotor 50 moves to the desorption chamber 830 by adsorbing moisture contained in the internal air while staying in the adsorption chamber 820.

(Desorption)
In the desorption chamber 830 of the humidifier 800, the internal air at 10 ° C. and a relative humidity of about 90% (absolute humidity 0.007 kg / kg) is sucked into the desorption side intake air passage 831 from the desorption side intake port 57, and the electric heater 54 is heated to 27.5 ° C. and about 30% (absolute humidity 0.007 kg / kg). Then, it flows into the desiccant rotor 50 in this state.
At this time, moisture stored in the desiccant rotor 50 (moisture adsorbed in the adsorption chamber 820) moves (desorbs) to the passing air side. In other words, the air in the cabinet that has passed through the desiccant rotor 50 is humidified to 17 ° C. and about 90% (absolute humidity 0.011 kg / kg), and is connected to the vegetable compartment from the desorption side exhaust port 58 via the desorption side exhaust air passage 832. 300 is exhausted.
In addition, when the flow rate of outside air passing through the desiccant rotor 50 in the adsorption chamber 820 is 0.0003 kg / second, the adsorption amount is 3.24 g / hour, and the amount of the internal air passing through the desiccant rotor 50 in the desorption chamber 830 is When the flow rate is 0.00025 kg / second, the desorption amount (humidification amount) is 3.24 g / hour.

(Defrosting)
Furthermore, the moisture of the air in the cabinet passing through the refrigerator compartment 100 is released to the vegetable compartment 300, and the moisture in the cabinet air returning to the cooler 12 via the lower return air passage 612 is reduced accordingly. For this reason, since the frost formation to the cooler 12 can be suppressed and the energization time to the heater 16 for defrosting can be reduced, it is possible to suppress the power consumption.

[Embodiment 4]
FIG. 9 is a longitudinal sectional view for explaining a refrigerator according to Embodiment 4 of the present invention. The same parts as those in Embodiment 1 (FIG. 2) are denoted by the same reference numerals, and a part of the description is omitted. In FIG. 9, the refrigerator 4000 is provided with a humidifier 800 on the refrigerator compartment opening / closing door 101 of the refrigerator compartment 100. That is, the suction side intake port 55 and the suction side exhaust port 56 of the humidifying device 800 communicate with the outside (outside of the refrigerator compartment) 101 of the refrigerator compartment opening / closing door 101, and the desorption side intake port 57 and the removal side exhaust port 58 are connected to the refrigerator compartment opening / closing door 101. It communicates with the inside (inside the cabinet).

  Therefore, similarly to the vegetable room 300 in the first embodiment, the refrigerator compartment 100 can be humidified, so that the stored foods can be prevented from being dried and the freshness can be maintained for a long time. Further, since the humidifying device 800 is installed in the refrigerator compartment opening / closing door 101, the suction side intake port 55 can be made large, and since it is installed in front of the refrigerator 4000, the outside air is surely introduced. It becomes possible to do.

[Embodiment 5]
FIG. 10 is a longitudinal sectional view for explaining a refrigerator according to Embodiment 5 of the present invention. The same parts as those in Embodiment 1 (FIG. 2) are denoted by the same reference numerals, and a part of the description is omitted. In FIG. 10, the refrigerator 5000 is provided with a humidifying device 800 on the top surface 103 of the refrigerator compartment 100. That is, the suction side intake port 55 and the suction side exhaust port 56 of the humidifier 800 communicate with the upper side (outside of the housing), and the desorption side intake port 57 and the desorption side exhaust port 58 are located inside the refrigerator compartment opening / closing door 101 ( Communicated with the inside).

  Therefore, similarly to the vegetable room 300 in the first embodiment, the refrigerator compartment 100 can be humidified, so that the stored foods can be prevented from being dried and the freshness can be maintained for a long time. Further, since the humidifier 800 is installed on the refrigerator compartment top surface 103, the humidifier 800 can be installed in the refrigerator compartment 100 without greatly changing the refrigerator layout.

[Other embodiments]
As described above, the present invention has been described by taking as an example a refrigerator having a capacity of 240 L in which the refrigerating room 100, the switching room 400, the ice making room 500, the vegetable room 300, and the freezing room 200 are arranged from top to bottom. However, the present invention is not limited to this, and the capacity, the number of rooms, the arrangement form of the rooms, and the like are not limited.
For example, the vegetable room 300 may be arranged directly under the refrigerator compartment 100. At this time, the suction side intake port 55 and the suction side exhaust port 56 of the humidifier 800 may be opened on the bottom surface of the refrigerator compartment 100. In addition, for example, one that does not include the freezing room 200, the switching room 400, or the ice making room 500, or one that includes only one of the refrigeration room 100 and the vegetable room 300 (one room refrigerator) may be used.

The external appearance perspective view explaining the refrigerator which concerns on Embodiment 1 of this invention. The longitudinal cross-sectional view of the refrigerator shown in FIG. Sectional drawing seen from the vegetable compartment upper part which shows the humidification apparatus installed in the refrigerator shown in FIG. The equilibrium adsorption diagram of the desiccant rotor installed in the refrigerator shown in FIG. The wet air line figure explaining the operation | movement of the desiccant rotor of FIG. Sectional drawing which shows the humidification apparatus in the refrigerator which concerns on Embodiment 2 of this invention. The longitudinal cross-sectional view explaining the refrigerator which concerns on Embodiment 3 of this invention. The humid air line figure explaining operation | movement of the desiccant rotor of FIG. The longitudinal cross-sectional view explaining the refrigerator which concerns on Embodiment 4 of this invention. The longitudinal cross-sectional view explaining the refrigerator which concerns on Embodiment 5 of this invention.

Explanation of symbols

 12: Cooler, 13: Circulation fan, 16: Defrosting heater, 18: Drain pipe, 19: Water collecting container, 20: Radiation pipe, 21: Vegetable room humidity sensor, 22: Compressor, 50: Desiccant rotor, 51 : Motor, 52: adsorption side fan, 53: desorption side fan, 54: electric heater, 55: adsorption side intake port, 56: adsorption side exhaust port, 57: desorption side intake port, 58: desorption side exhaust port, 100: Refrigerating room, 101: Refrigerating room opening / closing door, 103: Refrigerating room top surface, 200: Freezing room, 201: Door, 210: Freezing case, 300: Vegetable room, 301: Door, 302: Back surface, 303: Top surface, 303: Vegetable room top surface, 304: Vegetable room air path, 305: Recessed part, 308: Humidity adjustment air path, 310: Fruit case, 320: Vegetable case, 400: Switching room, 401: Door, 402: Back surface, 410 : Switching case, 500: Ice making chamber, 501: Door, 600: Blower chamber, 601: Finish Cut wall, 603: upper return air passage, 604: middle return air passage, 610: refrigerator compartment air passage, 611: refrigerator opening / closing valve, 612: lower return air passage, 620: freezer compartment air passage, 640 : Switching chamber air path, 641: switching chamber on-off valve, 700: air cooling means, 800: humidifier, 801: front surface, 802: bottom surface, 810: box, 820: adsorption chamber, 821: adsorption side intake air channel, 822: Adsorption side exhaust air path, 830: Desorption chamber, 831: Desorption side intake air path, 832: Desorption side exhaust air path, 840: Partition, 850: Adsorption chamber partition plate, 860: Desorption chamber partition plate, 900: Humidification Apparatus, 1000: refrigerator, 3000: refrigerator, 4000: refrigerator, 5000: refrigerator.

Claims (7)

  Included in the air cooling means for cooling the internal air, the refrigerating room to which the internal air cooled by the air cooling means is supplied, the circulation air passage and circulation fan for circulating the internal air, and the outside air A desiccant rotor that adsorbs moisture and desorbs the moisture into the refrigerator compartment.   Humidity detection means for detecting the relative humidity of the air inside the refrigerator is installed in the refrigerator compartment, and one or both of the moisture adsorption amount and the moisture desorption amount of the desiccant rotor are controlled based on the detection result of the humidity detection means. The refrigerator according to claim 1.   Air cooling means for cooling the internal air, a first refrigerating room to which the internal air cooled by the air cooling means is supplied, and a part of the internal air passing through the first refrigerating room is supplied. Moisture contained in the second refrigerator compartment, circulation air passage and circulation fan for circulating the compartment air, moisture contained in the compartment air inside the first refrigerator compartment, or moisture contained in the compartment air passing through the first refrigerator compartment A desiccant rotor that adsorbs and desorbs the moisture into the second refrigerator compartment.   Humidity detection means for detecting the relative humidity of the air in the cabinet is installed in one or both of the first cold storage room and the second cold storage room, and based on the detection result of the humidity detection means, the moisture adsorption amount of the desiccant rotor or 4. The refrigerator according to claim 3, wherein one or both of the moisture desorption amounts are controlled.   The refrigerator according to any one of claims 1 to 4, wherein the desiccant rotor includes a solid adsorbent in which the equilibrium adsorption rate of water rapidly changes in a relative humidity range of approximately 30 to 40%.   6. The refrigerator according to claim 5, wherein the solid adsorbent is made of a silicon material having a large number of pores having a hole diameter of 1.5 to 2.5 nanometers. The desiccant rotor is rotatably disposed across an adsorption air passage through which air for adsorbing moisture flows and a desorption air passage through which air for desorbing moisture flows,
The heat release pipe connected to the electric heater for heating air or the said air cooling means is installed in the upstream of the desiccant rotor in the said desorption wind path, The one in Claim 1 thru | or 6 characterized by the above-mentioned. Refrigerator.

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