JP4619379B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator, and more particularly to a refrigerator having a humidity adjusting function.

In a household refrigerator (hereinafter referred to as “refrigerator”), keeping food in a high humidity environment is effective for maintaining freshness. For example, if cakes, side dishes, etc. are stored in a high humidity environment, the amount of water evaporated from the food can be suppressed, so that the taste and freshness can be maintained over a long period of time. At the same time, the trouble of packaging (wrapping or the like) or sealing in a sealed container (tapper or the like) can be saved, and consumables can be saved.
Moreover, also in the preservation | save of vegetables, since the transpiration | evaporation effect | action of the water | moisture content in vegetables can be suppressed in a high-humidity environment, the freshness of vegetables can be kept long.

Therefore, the vegetable room of the refrigerator is sealed to minimize convection, and a porous and hydrophilic moisture permeable plate is installed, and the vegetable room is further humidified by moisture radiation from the moisture permeable plate. Is disclosed (for example, see Patent Document 1).
Further, an invention is disclosed in which a tempered member made of porous silica (which releases moisture in a low-humidity atmosphere and absorbs moisture in a high-humidity atmosphere) is installed in the vegetable room to prevent condensation and maintain a high-humidity state. (For example, refer to Patent Document 2).
Furthermore, an ultrasonic humidifier is provided in the thawing chamber provided inside the vegetable case, and defrost water generated from the heat exchange cooler during defrosting during refrigerator operation is collected, and the defrost water is ultrasonically humidified. An invention is disclosed in which a device is discharged as fine water droplets to humidify a vegetable case (see, for example, Patent Document 3).

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

However, the invention disclosed in Patent Document 1 has a problem that the moisture moves to the cooler and the amount of moisture in the storage for storing the food decreases (same as dehumidification). Also in radiation cooling, there is a problem that moisture is removed by the cooler and the humidity is reduced (dehumidified).
Further, the invention disclosed in Patent Document 2 has a high moisture-releasing temperature in porous silica, so that moisture is hardly released when the vegetable case is cooled to a low temperature of 0 to 10 ° C. In addition, when actively humidifying, when moisture is released from the silica gel, the temperature of the ambient air can be raised and humidified by circulating it through the silica gel. Since this increases, there is a problem that it is difficult to employ humidification using this method.
Furthermore, since the invention disclosed in Patent Document 3 is a system that uses defrosted water, a water reservoir tank or the like for storing defrosted water must be provided. In addition, there is a problem that the odor of food has moved to the cold air in the freezer and the odor has also moved to the defrost water.

  The present invention has been made in order to solve the above-described problems, and provides a refrigerator having a simple configuration capable of adjusting the humidity of the air in the cabinet while suppressing the temperature rise inside the refrigerator.

A refrigerator according to the present invention is a refrigerator having a casing, a refrigerator compartment, a vegetable compartment, a cooler for cooling air, and an air circulation means for circulating air, which are respectively disposed in the casing. And
A moisture adjustment means that can absorb and desorb moisture due to the relative humidity difference is installed,
The moisture of the moisture adjusting means is desorbed by the air flowing from the refrigerator compartment to the vegetable compartment,
Moisture is adsorbed by the moisture adjusting means by air flowing from the vegetable compartment to the cooler.

  In the refrigerator according to the present invention, moisture generated from vegetables or the like in the vegetable room is adsorbed by the moisture adjusting means, and the adsorbed moisture is desorbed and returned to the vegetable room from the moisture adjusting means. The humidity of the vegetable room air can be adjusted.

[Embodiment 1]
1 to 5 illustrate a refrigerator according to Embodiment 1 of the present invention. FIG. 1 is a perspective view seen from the front, and FIG. 2 is a cross-sectional view taken along line AA shown in FIG. 3 is a cross-sectional view taken along line BB in FIG. 1, FIG. 4 is a cross-sectional view taken along line BB in FIG. 1 (same as FIG. 3), and FIG. 5 is an enlarged view of the desiccant rotor.
In FIG. 1, a refrigerator 1 includes a refrigerating room 100 arranged at the top, a switching room 400 and an ice making room 500 arranged in parallel below the refrigerating room 100, and a switching room 400 and an ice making room 500. It is comprised from the vegetable room 300 arrange | positioned, and the freezer compartment 200 arrange | positioned under the vegetable room 300 (same in the lowest part).
The switching chamber 400 can be switched from a freezing temperature zone (about −12 to −22 ° C.) to a refrigerated temperature zone (about 0 to 5 ° C.). In a refrigerator with a total capacity of 450 L, the capacity of each room is about 240 L in the refrigerator, 80 L in the freezer, and about 90 L in the vegetable room.

In FIG. 2, the refrigerating room 100 and the ice making room 500 and the refrigerating room 100 and the switching room 400 are separated by a partition 2 filled with a heat insulating material. A partition 3 separates the ice making chamber 500 and the vegetable chamber 300 and between the switching chamber 400 and the vegetable chamber 300. Similarly, the vegetable compartment 300 and the freezer compartment 200 are separated by a partition 4.
The heat insulating box of the refrigerator is formed of a steel plate outer box 5 (same as the casing), a synthetic resin inner box 6, and a heat insulating material 7 filled between the two.

  The refrigeration cycle of the refrigerator 1 includes a compressor 8 that compresses a refrigerant, a condenser 9 that condenses the refrigerant, a throttle device 10 that decompresses the refrigerant, and a cooler 11 that evaporates the refrigerant. The condenser 9, the expansion device 10, and the cooler 11 are connected in series in this order. And the cooler 11 is arrange | positioned at the back surface of the vegetable compartment 300. FIG.

In FIG. 2 (cross-sectional view taken along line AA shown in FIG. 1), a partition 12 formed of a heat insulating material is disposed on the back of the vegetable compartment 300, and a freezing wind is provided between the partition 12 and the cooler 11. A road partition 13 is disposed, and an inflow air path to the freezer compartment 200 is formed between the partition 12 and the partition 13. A fan 14 is disposed above the cooler 11.
Accordingly, the downward air of the air sent by the fan 14 passes through the air passage between the partition 12 and the partition 13 and enters the freezer compartment 200, and then the return air formed behind the freezer compartment 200. It flows to the cooler 11 via the path.

Moreover, the heat insulation partition 12 arrange | positioned at the back surface of the vegetable compartment 300 is extended to the back surface of the ice making room 500 and the switching room 400, and the clearance gap between the upper end edge of the heat insulation partition 12 and the partition 2 is the switching room 400 and the ice making room. An inflow air path to 500 is formed.
A refrigerating air passage partition 15 is provided on the back of the refrigerating chamber 100, and a through hole formed in the partition 15 forms a refrigerating inflow air passage. In order to control the wind, a refrigeration air passage opening / closing valve 16, a refrigeration air passage opening / closing valve 17, a switching air passage opening / closing valve 18, and an ice making air passage opening / closing valve (not shown) are installed in the air passage to each room. ing.
Therefore, the upward air of the air sent by the fan 14 is supplied to the refrigeration air passage opening / closing valve 16, the refrigeration air passage opening / closing valve 17, the switching air passage opening / closing valve 18, or the ice making air passage opening / closing valve (not shown). By opening / closing or adjusting the opening degree, an appropriate amount of time selectively flows into the refrigerating room 100, the switching room 400 or the ice making room 500.

  In FIG. 3 and FIG. 4 (cross-sectional view taken along line BB shown in FIG. 1), the air (return air) that has flowed out of the refrigerator compartment 100 descends through the back of the switching chamber 400 and passes through the vegetable compartment 300. (Refer to FIG. 3) or without going through (refer to FIG. 4), return to the cooler 11 through the return air passage on the back of the vegetable compartment 300. A desiccant rotor 19 that absorbs and desorbs moisture is provided at the inflow / outlet of the vegetable compartment 300, and a heater 24 is provided in the air path in front of the desiccant rotor 19.

In FIG. 5, the desiccant rotor 19 is provided with a first desiccant plate 20 and a second desiccant plate 21 facing the side surface of the rotating shaft 23, and facing the side surface of the rotating shaft 23 with a phase difference of 90 ° therebetween. Switching plates 22a and 22b (hereinafter collectively referred to as “switching plate 22”) are installed. The rotating shaft 23 is arranged in the center in the height direction of the inlet / outlet of the vegetable compartment 300 with the axis centered horizontally.
And the 1st desiccant board 20 and the 2nd desiccant board 21 (a plane is formed by both) can cover the substantially whole area of the inflow / outlet of the vegetable compartment 300, At this time, the switching board 22a or the switching board 22b Can block the return air path on the back of the vegetable room 300 (see FIG. 3).

Moreover, the switching plate 22a and the switching plate 22b (a plane is formed by both) can cover substantially the entire area of the inflow / outlet of the vegetable chamber 300, and at this time, the first desiccant plate 20 or the second desiccant plate 21 is covered. Can close the return air path on the back of the vegetable room 300 (see FIG. 4).
Furthermore, the amount of air flowing into the vegetable compartment 300 (same as the amount of air passing directly through the return air passage on the back of the vegetable compartment 300) can be adjusted according to the rotation angle of the rotary shaft 23, so that the first desiccant plate 20 and the second desiccant plate 20 The amount of air passing through the second desiccant plate 21 is also adjustable.

  The first desiccant plate 20 and the second desiccant plate 21 constituting the desiccant rotor 19 have a honeycomb structure having a height of 10 mm, a width of 90 mm, a depth of 10 mm, and having about 50 cells per square inch, Water is adsorbed and desorbed at a relative humidity of 30 to 40%, and a silicon material provided with a large number of pores having a hole diameter of 1.5 to 2.5 nanometers is supported on a substrate.

  Next, the humidifying operation will be described. Tables 1 to 3 show average values such as temperature and relative humidity in the absence of the desiccant rotor 19. The measurement conditions in Table 1 are the average value of the temperature of the internal air (hereinafter referred to as “air”) when the compressor 8 and the fan 14 are operating with the outside air temperature of 30 ° C. and the door closed. The case where the thing which discharge | releases a water | moisture content is not contained in the refrigerator compartment 100 or the vegetable compartment 300 is represented.

  The temperature of the air leaving the cooler 11 is −25 ° C. and the relative humidity is 100%, and the air entering the refrigerator compartment 100 is warmed by the heat from the outside of the refrigerator and the dry bulb temperature is 4.3 ° C. and the relative humidity is 17.9. %become. Since the cooler 11 is close to the air path flowing from the refrigerator compartment 100 to the vegetable compartment 300, the air is cooled to a dry bulb temperature of 0.5 ° C. and a relative humidity of 22.2%. And if it enters into the vegetable room 300, it will receive the heat from the outside of a warehouse, and the heat of a heater, and will become dry-bulb temperature 9.2 degreeC and relative humidity 17.3%.

Tables 2 and 3 show values when water corresponding to vegetables is released into the vegetable room 300. Although the dry bulb temperature is 0.6 ° C. and the relative humidity is 21.8% as in the case where there is no moisture at the entrance to the vegetable room, the dry bulb temperature is 9.7 ° C. and the relative humidity because moisture is released in the vegetable room 300. Increases to 37.4%.
When there is no desiccant rotor 19, air containing a large amount of water returns from the vegetable compartment 300 to the cooler 11. For this reason, the cooling performance deteriorates due to the frost adhering to the cooler 11, and the power consumption increases by extending the energization time of the heater for removing the frost. Moreover, when the heater for defrosting is operated for a long time (ON), the internal temperature is likely to rise, and the quality of the food may be deteriorated.

The desiccant rotor 19 is installed at the entrance / exit of the vegetable compartment 300 (see FIG. 3), desorbed at the portion entering the vegetable compartment 300 from the refrigerator compartment 100 (same as humidifying the inflowing air), and returns from the vegetable compartment 300 to the cooler 11. By adsorbing at the portion (same as dehumidifying outflowing air), the inside of the vegetable compartment 300 can be kept moist and frosting on the cooler 11 can be reduced.
By making it the wind path structure which flows in from the ceiling of the vegetable compartment 300 through the desiccant rotor 19, the whole vegetable compartment 300 inside can be humidified effectively.

Since the air at the entrance of the vegetable room 300 has a dry bulb temperature of 0.6 ° C. and a relative humidity of 21.8% and a low relative humidity, moisture is desorbed when passing through the desiccant rotor 19, and in an ideal state, dry bulb It enters the vegetable room 300 after being humidified to a temperature of −3 ° C. and a relative humidity of 60%.
When the vegetable room 300 is too cold, it is easy to remove it by energizing the heater 24 installed in the air passage in front of the desiccant rotor 19, raising the temperature of the air to lower the relative humidity, and passing it through the desiccant rotor 19. Efficiency is improved.

  Alternatively, if the desiccant rotor 19 is rotated 90 ° to the position shown in FIG. 4, the entrance / exit of the vegetable compartment 300 is blocked by the switching plate 22. Then, since the air that has exited the refrigerator compartment 100 returns to the cooler 11 through the desiccant rotor 19 without entering the vegetable compartment 300, the temperature of the vegetable compartment can be adjusted without the heater 24 (ie, the heater 24 may be removed).

When air having a high relative humidity returns from the vegetable compartment 300 through the desiccant rotor 19 to the cooler 11, moisture in the air is adsorbed by the desiccant rotor 19 and the air is dehumidified.
In the state without the desiccant rotor 19, the vegetable chamber 300 had a dry bulb temperature of 9.7 ° C. and a relative humidity of 37.4%, but when the air humidified by the desiccant rotor 19 flows into the vegetable chamber 300, Assuming that the vegetable compartment is gradually humidified to a dry bulb temperature of 5 ° C. and a relative humidity of 60%, the air passing through the desiccant rotor 19 from the vegetable compartment 300 is dehumidified to a dry bulb temperature of 8 ° C. and a relative humidity of 30%.

  The desiccant rotor 19 is saturated with time after the start of adsorption / desorption, and the adsorption / desorption performance is lowered. Therefore, the desiccant rotor 19 is rotated by 180 ° about the rotating shaft 23 before the performance is lowered. For example, the first desiccant plate 20 that is disposed on the adsorption side and contains a large amount of moisture is moved to the desorption side, and the second desiccant plate 21 that is disposed on the desorption side and releases moisture is moved to the adsorption side, and adsorption and desorption is performed. Sustain performance.

23 to 26 are characteristic diagrams showing the moisture adsorption / desorption characteristics of the desiccant rotor. The desiccant rotor 19 in FIGS. 23 to 25 is composed of a silicon material provided with a large number of pores having a hole diameter of 1.5 to 2.5 nanometers, and adsorbs and desorbs moisture at a relative humidity of 30 to 40%. The first desiccant plate 20 and the second desiccant plate 21 are provided. Moreover, it represents with the desorption amount ratio (g / g ') which is the moisture content (g) with respect to a silicon material (g').
FIGS. 23 to 26 show the amount of saturated adsorption when the relative humidity is 15% under the condition that the dry bulb temperature is 0 ° C. and the relative humidity is 15 and 25% passes through the desiccant rotor 19 simulating the entrance of the vegetable room 300. When the relative humidity is 25%, the saturated desorption amount is 0.26 g / g ′ and the time constant is 1300 seconds and 0.16 g / g ′.

FIG. 26 shows that the saturated adsorption amount is 0.45 g / g ′ and the time constant is 600 seconds under the condition that the air at the dry bulb temperature of 5 ° C. and the relative humidity of 60% passes through the desiccant rotor 19 simulating the outlet of the vegetable room 300. 0.27 g / g ′.
Since the desorption rate is slower than the adsorption rate, the specification of the desiccant rotor 19 is determined by the performance on the desorption side, so the time constant is about 20 minutes, so the inversion interval of the desiccant rotor 19 is also 20 minutes and the moisture released from the vegetable 1 The silicon material required to adsorb and desorb 2 g / h is
1.2 (g / h) /0.16 (g / g ′) / 3 (rotation / h) = 2.5 (g ′)
And Since the silicon material is necessary for both the first desiccant plate 20 and the second desiccant plate 21, the desiccant rotor 19 has a total loading amount (amount of silicon material) of 5.0 g ′.

The size of the desiccant rotor 19 is the same width and height as the inlet air passage of the vegetable room 300 so that the wind passes through the whole, and the cell density of the honeycomb structure and the depth of the desiccant plate are determined so that the pressure loss does not increase.
By providing the desiccant rotor 19 on the back of the ceiling, the air humidified from the ceiling air passage can uniformly moisten the room, and if the desiccant rotor 19 of 20 mm x 90 mm x 10 mm size is used, the interior volume of the vegetable storage is reduced. You do n’t have to.

  Table 4 shows the amount of water evaporated when the substrate is not carrying the adsorption / desorption material and when it is carried. Two cases of 500 milliliters of water are installed in the vegetable room 300, and the amount of water evaporated from a total of 1 liter of water is used as the amount of water evaporation. The evaporation amount was suppressed to 0.86 g / h with the adsorbing / desorbing material, compared to 1.51 g / h without the adsorbing / desorbing material.

The amount of air passing through the desiccant rotor 19 depends on the temperature conditions in the refrigerator. When the temperature of the freezer compartment 200 is too cold, the internal fan 14 stops, and when the refrigerator compartment 100 is too cold, the refrigerated air passage is opened and closed. Since the valve 16 is closed to stop the air blowing to the refrigerator compartment 100, the wind does not pass through the desiccant rotor 19.
The desiccant rotor 19 is controlled to stop the timer when the refrigerated air passage opening / closing valve 16 is closed or the internal fan 14 is stopped, in addition to the inversion control at intervals of 20 minutes. By performing the above, adsorption / desorption can be performed reliably.

  As described above, the low relative humidity air flowing out from the refrigerator compartment 100 and flowing into the vegetable compartment 300 is humidified by passing it through the desorption side of the desiccant rotor 19 (for example, the first desiccant plate 20). The vegetable chamber 300 can be moisturized by dehumidifying the air having a high relative humidity that flows out and returns to the cooler 11 through the adsorption side of the desiccant rotor 19 (for example, the first desiccant plate 21), and is cooled. The frosting of the vessel 11 can be reduced.

[Embodiment 2]
6 and 7 illustrate a refrigerator according to Embodiment 2 of the present invention. FIG. 6 is a perspective view seen from the front, and FIG. 7 (a) is a line BB shown in FIG. FIG. 7B is an enlarged view of the desiccant rotor. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.
In FIG. 7A, the refrigerator 1 b includes a cylindrical desiccant rotor 25 at the inlet / outlet of the vegetable compartment 300.
In FIG. 7B, the desiccant rotor 25 is provided with a rotation shaft 23 at the center axis of the cylinder, the second desiccant plate 21 on the upper side of the cylinder and the first desiccant plate 20 on the lower side, and 180 ° in 20 minutes. Rotate at a constant speed. When the substrate shape is a rectangular parallelepiped as in the desiccant rotor 19 (Embodiment 1), a large substrate cannot be used because it crosses the surrounding space when rotating, but it is cylindrical and the rotation shaft 23 is the center. Rotating to eliminates the need for extra space. Therefore, the size of the cylinder can be increased by the amount that is no longer needed, and the amount of adsorption / desorption can be increased. Moreover, since it should just rotate at a constant speed if it is a cylindrical shape, control is easy.

[Embodiment 3]
8 and 9 illustrate a refrigerator according to Embodiment 3 of the present invention. FIG. 8 is a perspective view seen from the front, and FIGS. 9 (a) and 9 (b) are FIG. It is sectional drawing in the BB line shown in FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.
9 (a) and 9 (b), the refrigerator 1c includes a desiccant rotor 19 and an air path switching means 26.
That is, a rectangular parallelepiped desiccant rotor 19 is installed horizontally on the back of the vegetable compartment 300, a desorption side flow path (on the left side in the figure with the rotation axis) on the left vegetable compartment 300 side, and an adsorption side on the cooler 11 side. Air path switching means that forms a flow path (right side across the rotating shaft in the figure) and can switch whether the air flowing out of the refrigerator compartment 100 is sent to the desorption side flow path or the adsorption side flow path 26 is provided on the upstream side of the desiccant rotor 19.

The air flowing out of the refrigerator compartment 100 has a dry bulb temperature of 0.6 ° C. and a relative humidity of 21.8%, but enters the desiccant rotor 19 and is humidified to a dry bulb temperature of −3 ° C. and a relative humidity of 60%. Enter room 300. Since the optimum temperature of the vegetable room 300 is about 5 to 8 ° C., the wind path switching means 26 can adjust the wind entering the vegetable room 300 although it may be too cold if the wind continues to enter. It becomes easy to make the most suitable environment for you.
When the air path switching function is also added to the desiccant rotor 19 as in the refrigerator 1 (Embodiment 1), it is not necessary to use the air path switching means 26 separately, but the positioning of the desiccant rotor 19 is ensured. In order to do this, a stopper mechanism and positioning control are required, which is complicated. That is, the refrigerator 1c can make the configuration of the desiccant rotor 19 simple and inexpensive by providing the air path switching means 26 separately.

The air path switching unit 26 includes a rotation shaft 28 and a shielding plate 27 installed on the rotation shaft 28. When the shielding plate 27 blocks the adsorption side flow path (in FIG. 8, it is horizontal on the right side of the rotation shaft 28), the return air from the refrigerator compartment 100 passes through the desorption side flow path and is desiccated by the desiccant rotor 19. It is humidified and enters the vegetable compartment 300, and further dehumidified by the desiccant rotor 19 through the adsorption side flow path from the vegetable compartment 300 and returns to the cooler 11 (see FIG. 9A).
On the other hand, when the temperature of the vegetable room 300 is too low, the return air of the refrigerator compartment 100 is passed through the adsorption side flow path with the shielding plate 27 of the air path switching means 26 vertically above the rotation shaft 28, and the cooler 11. Return directly to. If it does so, since the flow of the air which enters into the vegetable compartment 300 is stopped, it can prevent overcooling and temperature adjustment becomes possible (refer to (b) of Drawing 9).

[Embodiment 4]
10 illustrates a refrigerator according to Embodiment 4 of the present invention, FIG. 10 is a perspective view seen from the front, FIG. 11A is a cross-sectional view taken along the line AA shown in FIG. FIG. 11B is an enlarged cross-sectional view of the desiccant rotor. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.
In (a) of FIG. 11, the desiccant rotor 19 is installed in the refrigerator 1 d so as to penetrate the heat insulating partition 12 on the back of the vegetable compartment 300.

That is, the adsorption side (for example, the first desiccant plate 20) of the desiccant rotor 19 is provided in the air path from the fan 14 to the freezer compartment 200, and the desorption side (for example, the second desiccant plate 21) is at the entrance of the vegetable compartment 300. It is provided in the air passage.
When the inside of the refrigerator compartment 100 or the vegetable compartment 300 is dry and does not release moisture, the temperature and humidity of the vegetable compartment 300 are 9.2 ° C. dry bulb temperature and 17.3% relative humidity as shown in Table 1. The absolute humidity is 1.24 × 10 −3 kg / kgDA, and even if the desiccant rotor 19 is provided at the outlet of the vegetable room 300, the relative humidity is low and the adsorption may not be sufficiently performed.

On the other hand, the freezer compartment 200 has a dry bulb temperature of −17.1 ° C., a relative humidity of 55.2%, an absolute humidity of 4.82 × 10 −4 kg / kgDA, a moisture transfer amount of 14.1 g / h, and a low temperature. High relative humidity and easy adsorption. Although the freezing chamber 200 has a lower absolute humidity than the vegetable chamber 300 but has a larger air volume, the amount of moisture transferred can provide a more stable adsorption amount in the freezing chamber. The vegetable room 300 has a refrigerated air passage opening / closing valve 16 so that there is much time zone during which the air is not sent to the desiccant rotor 19, but the freezing room 200 takes longer time to cool than other rooms, so the air blowing time from the fan is longer and the adsorption time is longer. If easy.
When the desiccant rotor 19 is installed on the upstream side of the refrigerating air passage, the wind entering the desiccant rotor 19 has a dry bulb temperature of −25 ° C. and a relative humidity of nearly 100%, and the air that comes out by adsorbing moisture to the desiccant rotor 19 is -24.3 ° C and a relative humidity of about 30%. Since the air entering the freezer compartment 200 is dehumidified, the frozen food can be prevented from becoming frosted.

[Embodiment 5]
12 and 13 illustrate a refrigerator according to Embodiment 5 of the present invention. FIG. 12 is a perspective view seen from the front, and FIG. 13 (a) is taken along the line AA shown in FIG. FIG. 13B is an enlarged sectional view of the desiccant rotor. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.
In FIG. 13A, the desiccant rotor 19 is provided in the partition 4 between the vegetable compartment 300 and the freezer compartment 200 in the refrigerator 1e.

  That is, the rotating shaft 23 of the desiccant rotor 19 is provided in the partition 4 between the vegetable chamber 300 and the freezing chamber 200, and the desiccant rotor 19 is installed through the partition 4. For this reason, the half of the desiccant rotor 19 on the vegetable chamber 300 side (for example, the second desiccant plate 21) is the desorption side, and the half on the freezer compartment 200 side (for example, the first desiccant plate 20) is the adsorption side, An air passage connecting the outlet of the chamber 100 and the desorption side of the desiccant rotor 19 (in the vegetable compartment 300), and an air passage connecting the adsorption side 20 (in the freezer compartment 200) and the cooler 11 of the desiccant rotor 19 Yes.

  Then, the air in the freezer compartment 200 has a dry bulb temperature of −17.1 ° C. and a relative humidity of 55.2%, and the air dehumidified through the desiccant rotor 19 has a dry bulb temperature of −16.6 ° C. and a relative humidity of 30%. Become. By adsorbing at the outlet of the freezer compartment 200, even if moisture is released from food in the freezer compartment 200, air is dehumidified before entering the cooler 11, thereby reducing frost formation on the cooler 11. can do.

[Embodiment 6]
14 and 15 illustrate a refrigerator according to Embodiment 6 of the present invention. FIG. 14 is a perspective view seen from the front, and FIG. 15 (a) is taken along the line CC shown in FIG. FIG. 15B is a cross-sectional view taken along the line DD shown in FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.
14 to 15, the refrigerator 1 f has a vegetable room 300 in the lowermost room and a freezer room 200 in the upper room of the vegetable room 300.

15 (a) and 15 (b), the desiccant rotor 19 in the refrigerator 1f has a rotating shaft 23 provided in the partition 4 between the vegetable compartment 300 and the freezer compartment 200, and the desiccant rotor 19 passes through the partition 4. Installed. That is, a half of the desiccant rotor 19 on the vegetable chamber 300 side (for example, the second desiccant plate 21) is a desorption side, and a half of the freezing chamber 200 side (for example, the first desiccant plate 20) is an adsorption side, And an air passage connecting the desiccant rotor 19 to the attachment / detachment side, and an air passage connecting the adsorption side of the desiccant rotor 19 and the cooler 11.
And since the vegetable compartment 300 is in the lower stage of the freezer compartment 200, since the desiccant rotor 19 can be installed in the ceiling surface of the vegetable compartment 300 (same as the floor surface of the freezer compartment 200), it is humidified from the desiccant rotor 19. The air that comes out can be spread throughout the vegetable compartment 300.

[Embodiment 7]
16 to 18 illustrate a refrigerator according to Embodiment 7 of the present invention. FIG. 16 is a perspective view seen from the front, and FIG. 17 (a) is a line AA shown in FIG. FIG. 17B is a cross-sectional view taken along line B-B shown in FIG. 16, and FIG. 18 is a cross-sectional view in plan view showing the desiccant rotor (cross-sectional view taken along line E-E shown in FIG. 17). The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.
16 and 17, the refrigerator 1g has a desiccant roller 29 on the side where the desiccant roller 29 is removed (for example, the second desiccant plate 21) (see FIG. 17 (a)) in the inflow air path to the refrigerating room 100. The suction side of the desiccant roller 29 (for example, the first desiccant plate 20) is disposed in the outlet air passage from 100 (see FIG. 17B).

That is, in the refrigerator 1g, when the rectangular parallelepiped desiccant rotor 29 is installed horizontally on the back of the refrigerator compartment 100, the direction that passes when the fan 14 flows into the refrigerator compartment 100 from the fan 14 is the desorption side, and the refrigerator 1g exits the refrigerator compartment 100. The rotation shaft 23 is disposed between the desorption side and the suction side.
Therefore, by humidifying the wind entering the refrigerator compartment 100 on the desorption side, the food in the refrigerator compartment 100 is prevented from drying, and at the same time, the wind coming out of the refrigerator compartment 100 is dehumidified on the adsorption side, so Frost can be reduced.

When the outside air is 30 ° C. and the relative humidity is 70% and there is no food that releases moisture in the refrigerator compartment 100 and the door is closed, the dry bulb temperature of the refrigerator compartment 100 is 4.3 ° C. and the relative humidity is 17.9. However, if the refrigeration door is repeatedly opened and closed several times, moisture enters from the outside air, and the dry bulb temperature of the refrigeration room 100 is 4.9 ° C. and the relative humidity is 47.7%. Further, when food that releases moisture is placed in the refrigerator compartment 100, the humidity is similarly increased.
Therefore, in the absence of the desiccant rotor 29, the moisture that has entered the refrigerator compartment 100 forms frost on the cooler 11, and the inside of the refrigerator compartment 100 is dried again.

On the other hand, in the refrigerator 1g in which the desiccant rotor 29 is installed, the desiccant rotor 29 adsorbs moisture contained in the air flowing out of the refrigerator compartment 100 on the adsorption side (for example, the first desiccant plate 20), and then adsorbs the adsorbed moisture. It is discharged into the air flowing into the refrigerator compartment 100 on the desorption side (for example, the first desiccant plate 20 adsorbing moisture is rotated and moved to the desorption side).
That is, since the refrigerator 1g is desorbed by the air entering the refrigerating room 100 and releases moisture again to the refrigerating room 100, the inside of the refrigerating room 100 can maintain moisture, and at the same time, frost formation on the cooler 11 can also occur. Can be reduced. The same effect can be obtained when food that releases water is placed in the refrigerator compartment 100.
Therefore, by using the desiccant rotor 29 for the refrigeration room and the desiccant rotor 19 for the vegetable room in combination, the humidity can be adjusted in both the refrigeration room 100 and the vegetable room 300.

[ Reference form ]
19 and 20 illustrate the form of the refrigerator referred to by the present invention. FIG. 19 is a perspective view seen from the front, and FIG. 20 (a) is a cross section taken along the line AA shown in FIG. FIG. 20B is an enlarged partial sectional view showing the cooling unit. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.
In FIG. 19 and FIG. 20, the refrigerator 1 h includes a cooling unit 30 in the air path between the vegetable compartment 300 and the cooler 11. The cooling unit 30 includes a base 31 formed of copper having good thermal conductivity, and fins 32 (made of copper) that are integrally formed with the base 31 or installed so as to be able to transfer heat. is set up.

For this reason, the base 31 is cooled by the heat absorption of the cooler 11, and the fins 32 that are cooled at the same time are exposed to the air path, so that the temperature is higher than 0 ° C. and lower than the dew point temperature of the humid air. If it does so, the water | moisture content of the air which passes through the cooling unit 30 (to be exact, between the fins 32) will adhere to the cooling unit 30 as dew condensation water, and will be discharged | emitted outside the warehouse through the drain hose 33.
In addition, since the temperature of the cooler 11 is 0 ° C. or less, the moisture contained in the air usually adheres as frost, but is recovered as condensed water in the cooling unit 30. The latent heat due to condensation is energy saving.

[ Embodiment 8 ]
21 and 22 illustrate a refrigerator according to an eighth embodiment of the present invention. FIG. 21 is a perspective view seen from the front, and FIG. 22 is a cross-sectional view taken along line BB shown in FIG. . The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.
In FIG. 22, the desiccant rotor 19 is installed in the inflow / outlet of the vegetable compartment 300 of the refrigerator 1i, and the air passage between the vegetable compartment 300 and the cooler 11 is provided with a cooling unit 30.
Therefore, moisture in the air from the vegetable compartment 300 or the refrigerator compartment 100 toward the cooler 11 is collected by the desiccant rotor 19 and the cooling unit 30.

That is, the desiccant rotor 19 returns the moisture generated in the vegetable compartment 300 to the vegetable compartment 300 again, thereby reducing the moisture going to the cooler 11 and reducing frost formation. However, when a large amount of water enters the chamber by opening the door or adding food with a lot of water, the water that could not be adsorbed by the desiccant rotor 19 is collected by the cooling unit 30 and is drained by the drain hose 33. Discharge outside the warehouse.
By providing both the desiccant rotor 19 and the cooling unit 30, moisture retention in the vegetable room 300 and discharge of excess water can be performed. Since the moisture passing through the cooling unit 30 is reduced by the amount that the desiccant rotor 19 can hold moisture, the shape of the cooling unit 30 can be kept small.

[Other embodiments]
Although Embodiment 1-9 is a refrigerator which comprises a refrigerator compartment etc. other than a vegetable compartment, this invention is not limited to this, The refrigerator only for vegetables which comprises only a vegetable compartment may be sufficient. . In addition, what is stored in the vegetable compartment is not limited to vegetables literally, but may be anything as long as it is required to be stored at a predetermined humidity (not limited to cereals and foods). ). Furthermore, it does not limit about the magnitude | size etc. of a refrigerator, For example, a refrigerator warehouse or a refrigerator container (mounted in a vehicle or a ship) may be sufficient.

  Since the present invention has a simple configuration as described above and can adjust the humidity of the air in the cabinet while suppressing the temperature rise inside the refrigerator, it can be widely used as various refrigerators for home use or business use. .

The perspective view seen from the front explaining the refrigerator which concerns on Embodiment 1 of invention. Sectional drawing in the AA shown in FIG. Sectional drawing in the BB line in FIG. Sectional drawing in the BB line in FIG. The enlarged view of the desiccant rotor in the refrigerator shown in FIG. The perspective view seen from the front explaining the refrigerator which concerns on Embodiment 2 of this invention. Sectional drawing in the BB line shown in FIG. 6, and the enlarged view of a desiccant rotor. The perspective view seen from the front explaining the refrigerator which concerns on Embodiment 3 of this invention. Sectional drawing in the BB line shown in FIG. The perspective view seen from the front explaining the refrigerator which concerns on Embodiment 4 of this invention. Sectional drawing in the AA line shown in FIG. 10, and the expanded sectional view of a desiccant rotor. The perspective view seen from the front explaining the refrigerator which concerns on Embodiment 5 of this invention. Sectional drawing in the AA line shown in FIG. 12, and an expanded sectional view of a desiccant rotor. The perspective view seen from the front explaining the refrigerator which concerns on Embodiment 6 of this invention. Sectional drawing in the CC line and DD line shown in FIG. The perspective view seen from the front explaining the refrigerator which concerns on Embodiment 7. FIG. Sectional drawing in the AA line and BB line shown in FIG. Sectional drawing of the planar view which shows the desiccant rotor in the refrigerator shown in FIG. The perspective view seen from the front explaining the form of the refrigerator which this invention referred to . Sectional drawing in the AA line shown in FIG. 19, and the expanded sectional view of a cooling unit. The perspective view seen from the front explaining the refrigerator which concerns on Embodiment 8 of this invention. Sectional drawing in the BB line shown in FIG. The characteristic view which shows the moisture absorption-and-desorption characteristic of a desiccant rotor. The characteristic view which shows the moisture absorption-and-desorption characteristic of a desiccant rotor. The characteristic view which shows the moisture absorption-and-desorption characteristic of a desiccant rotor. The equilibrium adsorption diagram of a desiccant rotor.

Explanation of symbols

1: refrigerator (Embodiment 1), 1b: refrigerator (Embodiment 2), 1c: refrigerator (Embodiment 3), 1d: refrigerator (Embodiment 4), 1e: refrigerator (Embodiment 5), 1f: Refrigerator (Embodiment 6), 1g Refrigerator (Embodiment 7), 1h: Refrigerator ( Reference Embodiment ), 1i: Refrigerator ( Embodiment 8 ), 2: Partition (Refrigerator / Icemaker and Refrigerator / Switching room), 3: partition (ice making room / vegetable room and switching room / vegetable room), 4: partition (vegetable room / freezer room), 5: outer box, 6: inner box, 7: heat insulating material, 8: compression Machine: 9: condenser, 10: throttle device, 11: cooler, 12: heat insulation partition on the back of the vegetable room, 13: partition for freezing air path, 14: fan in the cabinet, 15: partition for cold air path, 16: Refrigerated air passage opening / closing valve, 17: Refrigeration air passage opening / closing valve, 18: Switching air passage opening / closing valve, 19: Desiccant rotor, 2 0: first desiccant plate (adsorption side), 21: second desiccant plate (desorption side), 22: switching plate, 23: rotating shaft, 24: heater, 25: cylindrical desiccant rotor, 26: air path switching means 27: Shield plate, 28: Rotating shaft of the shield plate, 29: Desiccant rotor for refrigeration room, 30: Cooling unit, 31: Base, 32: Fin, 33: Drain hose, 100: Refrigeration room, 200: Freezer room, 300: vegetable room, 400: switching room, 500: ice making room.

Claims (16)

A refrigerator having a housing, a refrigerator compartment, a vegetable compartment, a cooler that cools air, and an air circulation means that circulates air, each disposed in the housing,
A moisture adjustment means that can absorb and desorb moisture due to the relative humidity difference is installed,
The moisture of the moisture adjusting means is desorbed by the air flowing from the refrigerator compartment to the vegetable compartment,
The refrigerator is characterized in that moisture is adsorbed to the moisture adjusting means by air flowing from the vegetable compartment to the cooler. A refrigerator having a casing, a refrigerator compartment, a vegetable compartment, a freezer compartment, a cooler that cools air, and an air circulation means that circulates air, each disposed in the casing,
A moisture adjustment means that can absorb and desorb moisture due to the relative humidity difference is installed,
The moisture of the moisture adjusting means is desorbed by the air flowing from the refrigerator compartment to the vegetable compartment,
The refrigerator is characterized in that moisture is adsorbed by the moisture adjusting means by air flowing from the freezer compartment to the cooler. A refrigerator having a casing, a refrigerator compartment, a vegetable compartment, a freezer compartment, a cooler that cools air, and an air circulation means that circulates air, each disposed in the casing,
A moisture adjustment means that can absorb and desorb moisture due to the relative humidity difference is installed,
The moisture of the moisture adjusting means is desorbed by the air flowing from the refrigerator compartment to the vegetable compartment,
The refrigerator is characterized in that moisture is adsorbed to the moisture adjusting means by air flowing from the cooler to the freezer compartment.   The refrigerator according to claim 2 or 3, wherein the moisture adjusting means is disposed through a heat insulating partition that partitions the vegetable compartment and the freezer compartment.   The refrigerator according to claim 3, wherein a heat insulating wall is disposed on the back surface of the vegetable compartment, and moisture adjusting means is disposed through the heat insulating wall. An air inlet and moisture adjusting means are arranged at the upper back of the vegetable room,
A ceiling air passage is formed from the upper back of the vegetable compartment toward the front,
The refrigerator according to any one of claims 1 to 5 , wherein air flowing in from the inflow port passes through a desorption portion of the moisture adjusting means and the ceiling air passage and spreads into the vegetable compartment. A refrigerator having a housing, a refrigerator compartment, a vegetable compartment, a cooler that cools air, and an air circulation means that circulates air, each disposed in the housing,
A moisture adjustment means that can absorb and desorb moisture due to the relative humidity difference is installed,
The moisture of the moisture adjusting means is desorbed by the air flowing from the cooler to the refrigerator compartment,
A refrigerator in which moisture is adsorbed by the moisture adjusting means by air flowing from the refrigerator compartment to the cooler.   8. The moisture adjusting unit according to claim 1, wherein the equilibrium adsorption amount at a relative humidity of 30% to 40% is larger than the equilibrium adsorption amount at a relative humidity of less than 30% or a relative humidity of more than 40%. The refrigerator described.   The moisture adjusting means is formed of a rotating shaft, a pair of moisture adjusting plates installed facing each other across the rotating shaft, and a pair of switching plates installed facing each other across the rotating shaft. The refrigerator according to claim 8.   The moisture adjustment means rotates 180 ° about the rotation axis about every 20 minutes, and one moisture adjustment plate of the pair of moisture adjustment plates repeats adsorption and desorption, and in parallel to the pair of moisture adjustment plates The refrigerator according to claim 9, wherein the other moisture adjusting plate of the moisture adjusting plate repeats desorption and adsorption. An air path that returns directly to the cooler is formed near the back of the vegetable compartment,
When the pair of moisture adjustment plates cover the inlet and outlet of the vegetable compartment, one switching plate of the pair of switching plates shuts off the air path,
And when the pair of switching plates shuts off the inlet and the outlet of the vegetable compartment, one of the pair of moisture adjusting plates is disposed in the air passage. The refrigerator according to claim 10.   9. The moisture adjusting means is a desiccant rotor having a cylindrical shape, having a rotation shaft at the center of the cylinder, and having one semi-cylindrical part on the adsorption side and the other semi-cylindrical part on the desorption side. refrigerator.   The refrigerator according to claim 12, wherein the moisture adjusting means rotates at a constant speed so that the adsorption side and the desorption side are switched at predetermined time intervals.   While the wind flow passing through the moisture adjusting means is stopped, the rotation of the rotating shaft is stopped, and every time excluding the stopped time reaches a predetermined time, the adsorption side and the desorption side The refrigerator according to claim 10 or 13, characterized in that is replaced. Air path switching means for switching between the air path entering the vegetable compartment and the air path returning directly to the cooler;
The refrigerator according to claim 14, wherein the air path switching means is switched according to the temperature of the vegetable room.   9. The refrigerator according to claim 8, further comprising heating means for heating air to the windward side from the vegetable room.

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