JPH04214166A - Freezing refrigerator - Google Patents

Abstract

PURPOSE:To keep the inside of a chilled case at a high humidity by a method wherein the chilled case, sliding in a low-temperature chamber forwardly and backwardly, is provided in a refrigerating chamber while a lid body, common for the low-temperature chamber and the chilled case, and a top surface cooling plate, put on the chilled case, are provided to form a cooling air passage between the top surface cooling plate and the low-temperature chamber. CONSTITUTION:In a freezing refrigerator, in which cold air is sent into respective chambers by a fan 20, a low-temperature chamber 5 is provided in a refrigerating chamber 3 while a chilled case 7, received in the low-temperature chamber 5 and sliding therein forwardly and rearwardly, is provided. Further, a common lid body 8, opening and/or closing the front part of the low-temperature chamber 5 and the chilled case 7, a top surface cooling plate 16 blockading the upper part of the chilled case 7, and a cooling air passage 17, formed between the top surface cooling plate 16 and the low-temperature chamber 5, are provided. On the other hand, the title refrigerator is provided with a cold air passage 19, communicated with the cooling air passage 17 and formed on the outer peripheral surface of the chilled case 7 so as to be opened in the refrigerating chamber 3, and a cold air supplying passage 13, guiding one part of cold air produced in a cooler 18 into the cooling air passage 17. The chilled case is closed so as to be air-tight and, therefore, the inside of the chilled case 7 can be kept at a high humidity.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a chilled case in a low temperature chamber provided in a refrigerator.

0002

[Prior art] Figs. 29 and 30 are U.S. Pat. No. 60-5596
9 is a front view and a cross-sectional view of the main parts of a conventional refrigerator-freezer disclosed in Publication No. 9. In the figure, 1 is the refrigerator-freezer main body, 2 is a freezer compartment, and 3 is a refrigerator compartment, which is divided into heat-insulating compartments by a partition wall 4. has been done. 5 is a low temperature chamber formed at the top of the refrigerator compartment,
6 is a vegetable compartment; 7 is a chilled case detachably housed in the cold room 5; 8 is a lid provided in front of the chilled case 7; 9 is an open upper part forming the cold room 5. A low-temperature box, 10 is a bottom partition wall thereof, 11 is a cold air passage formed between this bottom partition wall 10 and the outer bottom surface of the chilled case 7, and 12 is communicated with this cold air passage to supply cold air into the refrigerator compartment 3. The communication port 13 is a cold air supply path from the cooler, and the amount of cold air supplied into the refrigerator compartment 3 is controlled by a damper thermostat 14 that automatically opens and closes the cold air discharge port 13a. Reference numeral 15 designates a branch cold air supply path for supplying a portion of the cold air controlled by the damper thermostat 14 into the cold room 5, and communicates with the cold air passage 11.

Next, the operation will be explained. The cold air cooled by the cooler (not shown) is sent to the refrigerator fan (not shown).
A part of the cold air passes through the cold air supply path 13 to the refrigerator compartment 3, and the damper thermostat 14 automatically opens and closes the cold air outlet 13a according to the internal temperature to control the amount of cold air and supply the refrigerator compartment 3. Cool to a predetermined temperature (3°C),
Also, a cold air passage 1 for cooling the cold room 5 with some cold air.
1, cools the cold room 5 to a predetermined temperature (0° C.), passes through the communication port 12, and flows into the refrigerator compartment 3.

0004

[Problems to be Solved by the Invention] As described above, in the conventional refrigerator-freezer, in order to cool the cold room, a large amount of cold air is passed through the inner bottom of the cold room, and then the cold air is released to the inside top of the cold room. There were problems such as freezing of the refrigerated food in the low-temperature chamber, and the inability to maintain high humidity because the low-temperature chamber was not airtight.

[0005] This invention was made to solve the above-mentioned problems, and the chilled case of the low temperature room installed in the refrigerator room does not freeze and is kept at high humidity to dry food. The temperature can be controlled independently regardless of the temperature of the refrigerator compartment, the chilled case and its top cooling plate can be accurately positioned, and the top cooling plate can be attached and removed without removing the lid or chilled case. , an attempt is made to provide a refrigerator-freezer in which excess moisture in the cold room is retained on the top cooling plate, no odor or mold is generated in the chilled case, and frost generated on the top cooling plate is easily removed. It is.

[0006]

[Means for solving the problem] Claim 1 of this invention
The refrigerator-freezer is a refrigerator-freezer that forcibly sends cold air generated by a cooler to a refrigerator compartment or other rooms using a blower, and includes a cold room provided in the refrigerator compartment and having an open front.
A chilled case that is housed in the low temperature chamber and has an open front and top that slides back and forth inside the cold chamber, a common lid that opens and closes the front of the cold chamber and the chilled case, and a lid that closes the top of the chilled case. a cooling air passage formed between the top cooling plate and the cold room; a cooling air passage communicating with the cooling air passage formed on the outer peripheral surface of the chilled case and opening into the cold storage room; and a cold air supply path that guides a portion of the cold air generated by the cooler to the cooling air path.

[0007] The refrigerator-freezer according to claim 2 of the present invention includes:
A refrigerator-freezer that forcibly sends cold air generated by a cooler to a refrigerator compartment or other compartments using a blower includes a low-temperature chamber provided in the refrigerator compartment with an open front, and a low-temperature chamber housed within the low-temperature chamber, the inside of which is a chilled case with an open front and top that slides back and forth; a common lid that opens and closes the front of the cold room and the chilled case; a top cooling plate that closes the top of the chilled case; a cooling air path formed between a surface cooling plate and the cold room; a cold air supply path that guides a portion of the cold air generated in the cooler to the cooling air path; and a cold air supply path that returns this cold air to the cooler. and a cold air return passage.

[0008] The refrigerator-freezer according to claim 3 of the present invention includes:
The refrigerator-freezer according to claim 1 or 2, further comprising: an upper frame that covers the upper opening of the chilled case and on which the top cooling plate is placed; and a cold air passage provided in series with the upper frame via a hinge portion. and a rear protruding frame that forms a part of the chilled case and has its rear end surface abutted and fixed to the rear inner wall surface of the cold room.

[0009] The refrigerator-freezer according to claim 4 of the present invention includes:
The refrigerator-freezer according to claim 1 or 2, further comprising a top cooling plate provided on the upper part of the chilled case and removably engaged with the wall of the cold room downward via an annular frame provided on the periphery thereof. .

[0010] The refrigerator-freezer according to claim 5 of the present invention comprises:
In the refrigerator-freezer according to claim 1, 2, 3, or 4, the top cooling plate is made of a porous material.

[0011] The refrigerator-freezer according to claim 6 of the present invention comprises:
In the refrigerator-freezer according to claim 5, the top cooling plate is provided with a hydrophilic porous material having a humidity control function on the cooling air path side, and a hydrophilic porous material having a water absorption function and a moisture retention function on the chilled case side.

[0012] The refrigerator-freezer according to claim 7 of the present invention comprises:
In the refrigerator-freezer according to claim 5, the top cooling plate is provided with a hydrophilic porous material having a small porosity on the cooling air path side and a hydrophilic porous material having a high porosity on the chilled case side.

[0013] The refrigerator-freezer according to claim 8 of the present invention comprises:
In the refrigerator-freezer according to claim 5, 6, or 7, the porous material contains a deodorizing catalyst and an antibacterial agent.

[0014] The refrigerator-freezer according to claim 9 of the present invention comprises:
In the refrigerator-freezer according to any one of claims 1, 2, 3, 4, 5, 6, 7, or 8, a heater is provided in the cooling air passage above the top cooling plate.

[0015] The refrigerator-freezer according to claim 10 of the present invention is the refrigerator-freezer according to claim 9, in which, when defrosting the frost attached to the top cooling plate, while the heater is energized, the refrigerator generates no frost. The cooling air supply device includes a control means for controlling to close a cold air supply path that guides a portion of the cool air to the cooling air path.

A refrigerator-freezer according to an eleventh aspect of the present invention is the refrigerator-freezer according to the tenth aspect, wherein the heater is provided with a temperature sensor, and has a control means for controlling the temperature of the heater to be kept constant while the heater is energized.

The refrigerator-freezer according to claim 12 of the present invention is the refrigerator-freezer according to claim 9, which includes a heater for defrosting the top cooling plate and controlling the temperature inside the chilled case, and changing the amount of heat generated by this heater. and means.

A thirteenth aspect of the present invention provides a refrigerator-freezer according to the twelfth aspect, wherein the means for changing the amount of heat generated by the heater changes the amount of heat generated in accordance with the cumulative operating time of the compressor.

[0019]

[Function] In the refrigerator-freezer according to claim 1 of the present invention, the inside of the chilled case is kept at high humidity by sealing the cold room.

[0020] In the refrigerator-freezer according to claim 2 of the present invention, the cold air flowing along the top cooling plate is returned to the cooling compartment without being released into the refrigerator compartment, so that the chilled case can be independently brought to a desired temperature. can.

[0021] In the refrigerator-freezer according to claim 3 of the present invention, the top cooling plate and the chilled case can be accurately positioned.

In the refrigerator-freezer according to claim 4 of the present invention, the top cooling plate can be attached and detached for cleaning without removing the lid and the chilled case.

[0023] In the refrigerator-freezer according to claim 5 of the present invention, excess moisture in the cold room is retained in the top cooling plate made of porous material.

[0024] In the refrigerator-freezer according to claim 6 of the present invention, the inside of the chilled case is kept at high humidity, so that drying of food is suppressed and food can be stored in high quality.

[0025] In the refrigerator-freezer according to claim 7 of the present invention, when the inside of the chilled case becomes low humidity, the absorbed moisture is controlled by a surface with a small porosity so as not to be released too much to the air path side. Can be saved.

[0026] In the refrigerator-freezer according to claim 8 of the present invention, mold and odor are not generated in the chilled case due to the action of the desorption catalyst and antibacterial agent contained in the top cooling plate.

In the refrigerator-freezer according to the ninth aspect of the present invention, even if the top cooling plate freezes, it is melted by the heater provided in the cooling air passage above the top cooling plate.

[0028] In the refrigerator-freezer according to claim 10 of the present invention, when defrosting the top cooling plate of the chilled case, the cold air supply path is closed, so that the defrosting time is shortened.

[0029] The refrigerator-freezer according to the eleventh aspect of the present invention can prevent the top cooling plate from being heated due to unnecessary heating of the heater, and can maintain high quality storage.

[0030] In the refrigerator-freezer according to the twelfth aspect of the present invention, one heater defrosts the top cooling plate and keeps the chilled case warm.

[0031] In the refrigerator-freezer according to the thirteenth aspect of the present invention, frost formation on the top cooling plate is determined from the compressor operating time, and defrosting is performed when the cumulative time has elapsed for a predetermined time.

[0032]

[Example] Example 1. Example 1 of the present invention will be described below. That is, in FIG. 1, the same parts as in the conventional one will be given the same reference numerals, and the redundant explanation will be omitted. A chilled case with an open front and top that is housed and slides back and forth in the case; 9 a cold box with an open top forming the hermetically sealed cold room 5 therein; 8 a front of this cold box; and a common lid for opening and closing the front part of the chilled case 7, and 16 is a top cooling plate that closes the upper part of the chilled case 7, and this top cooling plate 16 can retain moisture evaporated from the internal food. It is made of porous material. Reference numeral 17 denotes a cooling air passage for the chilled case, which is formed in the hermetic cold room 5 so as to be located between the top cooling plate 16 and the lower surface of the middle partition wall 4.
A part of the cold air controlled by the damper thermostat 14 provided at the cold air outlet 13a of the cold air supply path 13 passes through the diversion cold air supply path 15 and enters the cooling air path 17, cooling the top surface of the chilled case 7. flows along the plate 16, and then FIG.
The cold air is discharged from the outer peripheral surface of the chilled case 7 into the refrigerator compartment 3 through a cold air passage 19 on the outer bottom surface thereof. Further, 20 is an internal fan for forced circulation of cool air disposed at the top of the cooler chamber (A), and 21 is a defrosting heater for the cooler provided directly below the cooler 18.

The following operation will be explained. That is, the cold air cooled by the cooler 18 is sent by the internal fan 20 and blown into the freezer compartment 2 to cool the freezer compartment. A part of the cold air is guided to the cold air outlet 13a through the cold air supply path 13 to the refrigerator compartment 3, and the amount of cold air is controlled by the damper thermostat 14 provided here to bring the inside of the refrigerator compartment 3 to a predetermined temperature (3°C ).

On the other hand, a part of the cold air flows through the cold air supply path 15 for distribution to the upper surface of the top cooling plate 16 made of a porous material, and then flows through the outer peripheral surface of the chilled case 7 and the cold air passage 19 on the outer peripheral surface. After that, it is released into the refrigerator compartment 3.

[0035] Since the surface of the top cooling plate through which the supplied cold air flows first is configured to have the lowest temperature, the inner bottom surface and inner circumferential surface of the chilled case 7, which is the surface on which the built-in food is placed, The temperature is not very low, so the internal food will not freeze. In addition, the above closed cold room 5
The front opening of the chilled case 7 inside is a common lid body 8.
Since it has a sealed structure, the inside of the chilled case 7 is kept at high humidity due to the evaporation of some water from the food, and as shown in Figure 3, the evaporation of water from the food is suppressed, and the food Freshness is maintained. Furthermore, since the top cooling plate 16, which has the lowest temperature, is made of a porous material capable of retaining moisture, the moisture evaporated inside can be retained within itself, and dew condensation does not occur on other parts.

Example 2. FIG. 4 is a diagram corresponding to FIG. 1 showing a second embodiment of the present invention,
In this embodiment, a part of the cold air controlled by the damper thermostat 14 provided at the cold air discharge port 13a of the cold air supply path 13 from the cooler 18 into the refrigerator compartment 3 is transferred to the cold air supply path 15.
, enters the cooling air passage 17 mentioned above, flows along the top cooling plate 16 of the chilled case 7, passes through the cold air return passage 37 to the cooler 18, returns directly to the cooler chamber A, and thereby cools the chilled case 7. 7 is designed to be independently cooled from the top surface.

At this time, the front openings of the cold room 5 and the chilled case 7 are closed by the lid 8, and the upper part of the chilled case is closed by the top cooling plate 16, so that the cooling air passage 17 is closed.
The cold air passing through does not directly enter the chilled case 7, and the inside of the chilled case 7 is kept at high humidity.

Example 3. Furthermore, FIGS. 5 and 6 show a third embodiment of the present invention, which aims at uniform positioning of the chilled case 7 and its top cooling plate 16 housed in the closed cold room 5, and FIG. The same reference numerals will be given to the same or corresponding parts as in the above, and the duplicate explanation will be omitted. It is an upper frame that forms a cooling air passage 17 that communicates with the diversion cold air supply passage 15 between the top cooling plate 16 and the lower surface of the middle partition wall 4, and extends downward in the figure via the hinge part 31. A rear rib 32 is superimposed and fixed on the rear wall of the chilled case 7 at a predetermined height. 33
A cold air outlet 34 communicating with the cooling air passage 17 is formed between the rear rib 32 and the rear rib 32, the rear end surface of which is abutted and fixed to the inner surface of the rear wall of the low temperature box 9.
This is a rear protruding frame that is integrated with the rear projecting frame.

That is, the upper frame 30 and the rear projecting frame 33
is installed in the low-temperature box 9 and the top cooling plate 16 is placed on the upper frame 30, and an optimal cold air passageway is formed around the chilled case 7 and the top cooling plate 16 leading to the refrigerator compartment 3. 1
It is distinctive in that the number 9 is formed.

Example 4. Furthermore, FIGS. 7 and 8 show the top cooling plate 1 of the chilled case 7.
This figure shows Embodiment 5 of the present invention, which is adapted to facilitate attachment and detachment into the sealed low temperature chamber 5 of FIG. 6, and the same or equivalent parts as in FIG. Although omitted, in the case of this invention, the closed cold room 5
The size of the top cooling plate 16 of the chilled case 7 which is housed inside and passes the cool air supplied from the cooler 18 to the cooling air passage 17 thereon is kept within the size of the upper opening of the chilled case 7. In addition, a cold air passage 19 is formed between the chilled case 7 and the low temperature box 9 through the annular frame 35 fitted to the peripheral edge of the chilled case 7 and the cold air passage 19 after passing through the cooling air passage 17 to the refrigerator compartment 3. Then, the top cooling plate 16 is removably engaged with the upper opening of the low-temperature box 9, and the top cooling plate 16 is held down from above by a rib 36 protruding from the lower surface of the partition wall 4. Prevents it from coming off. Note that the top cooling plate 16 used in Examples 4 and 5 does not necessarily need to contain a deodorizing catalyst or an antibacterial agent.

Example 5. A seventh embodiment of the present invention will be described with reference to FIG. 9. In this embodiment, the top cooling plate 16 is treated at a higher temperature than the lower surface 16b on the side of the cold room 5 and the lower surface 16b during sintering, so that the materials are melted by heat, and the porosity is increased because the materials are brought closer together. Since it becomes smaller, the proportion of pores 16c (porosity)
It is formed of a hydrophilic porous sintered resin with an upper surface 16a on the air passage side having a small diameter. The top cooling plate 16, which has the lowest temperature, is made of a hydrophilic porous sintered resin material whose lower part absorbs water and has a moisturizing function and whose upper part has a humidity control function. Even in the case of humidity, the lower pores 16c absorb moisture and no condensation occurs. If the water absorption and moisturizing ability are set to a sufficient level when the amount of food stored is large, on the other hand, when the amount of food stored is small, too much water will be absorbed. Since the amount of water is reduced by processing at a high temperature during freezing, when the amount of storage is small, the release of water is reduced and the inside of the cold room 5 is kept at high humidity. Hydrophilic porous sintered resin material has the effect of retaining moisture in its pores. The cold room side, which is prone to high humidity, needs to be made easier to hold moisture to prevent condensation and water droplets from falling onto the food. However, if the load is low and high humidity does not easily occur, the pores will reduce the degree of sealing, leading to drying of the food. For this reason, the surface on the air path side is in contact with cold air, so in order to prevent moisture from being absorbed from the sintered resin that holds moisture, the surface with fewer pores is placed on the air path side to prevent moisture evaporation. I try to adjust the humidity. If moisture is not retained, there will be no difference in humidity from the cold air, making it difficult for moisture to evaporate, and if there is a lot of moisture, it will evaporate more easily (humidity control function).

Example 6. In the above embodiment, when the top cooling plate 16 is sintered, one side is set at a higher sintering temperature than the other, and the pores 16c on the upper and lower surfaces are
However, as shown in FIG. 10, a secondary processed surface 38 is formed on the upper surface of the upper cooling plate 16 by, for example, hot stamping, painting, or pasting a film to reduce the pores 16c on the upper surface. Good too.

Furthermore, if the temperature distribution of the upper cooling plate 16 causes a partial increase in water absorption, the secondary processing surface 3
By adjusting the processing range in step 8, it is also possible to partially increase the amount of water released.

Example 7. Next, FIGS. 11 and 12 show a seventh embodiment of the present invention.
This is a diagram corresponding to FIG. 2, and 22 in the figure is the defrosting heater for the top cooling plate installed overlappingly on the lower surface of the middle partition wall 4, and is connected in parallel with the defrosting heater 21 for the cooler as shown in FIG. is,
Each of the drive relay contacts 25 and 26 is connected to each drive relay contact 25 and 26 at fixed time intervals counted by timer devices 23 and 24.
When the defrosting completion temperature sensors 21a and 22a reach a certain temperature or higher, the drive relay contacts 25 and 26 are turned on.
is turned off, and defrosting of the cooler 18 and the top cooling plate 16 is completed. 27 in the figure indicates a power source.

In the above embodiment, defrosting of the top cooling plate is performed independently of defrosting of the cooler, but FIG. 14 shows the defrosting heater 22 for the top cooling plate and the defrosting heater for the cooler. 21, and relay contact 25 for driving the defrosting heater for the cooler.
This is an example in which one heater turns on both heaters 21 and 22, and turns off both heaters 21 and 22 when the defrost completion temperature sensor 21a for the cooler reaches a certain temperature or higher.

Furthermore, in FIG. 15, a bimetallic switch 28 of the temperature return type is provided around the top cooling plate 16, and when the temperature inside the top cooling plate 16 or the closed cold room 5 rises too much, the top cooling plate switch 28 is installed. This is another embodiment in which the frost heater 22 is turned off. Note that the defrosting heater 22 described above is particularly densely arranged near the outlet to the cooling air passage 17, so this area has the lowest temperature and is likely to freeze, but it can be defrosted uniformly without any problems. become.

Example 8. Further, in FIG. 11, the top cooling plate 16 is made of a porous material, and each of the deodorizing catalyst and antibacterial agent (T, B, Z, etc.) whose main components are lanthanum oxide, zirconium phosphate, and titanium oxide is the porous agent. The content should be at least 2% by weight. With this configuration, the deodorizing catalyst and antibacterial agent contained in the top cooling plate 16 are used for the cold air passing through the cooling air path 17, and the heater 22 that assists the action of this is used on the top cooling plate 16. The heater 22 is arranged to overlap the lower surface of the partition wall 4 so as to face the cooling plate 16, and the heater 22 is periodically energized from a power source 24 by a timer 23, as shown in FIG. .

Embodiment 8 is constructed as described above, so a part of the cold air passes through the cold air supply path 15 for diversion, and is made of a porous material and contains a deodorizing catalyst and an antibacterial agent. The air flows to the top surface of the plate 16 and is then discharged into the refrigerator compartment 3 through the cold air passage 19 on the outer peripheral surface of the chilled case 7 and its outer bottom surface, so that no mold or odor is generated in the closed cold room 5. Further, the decomposition reaction by the deodorizing catalyst in the top cooling plate 16 is promoted by the above-mentioned heater 22 installed opposite thereto, as shown in FIG. 17. On the other hand, there is a concern that mold will grow inside the closed cold room 5 due to high humidity, but this is due to the above-mentioned top cooling plate 16.
This problem can be solved by using an antibacterial agent contained in the antibacterial agent. In addition, since the heater 22 is periodically energized by the timer 23, the temperature inside the chilled case 7 and the closed cold room 5 does not rise.

Example 9. A ninth embodiment of the invention will be described with reference to FIG. In this embodiment, the opening/closing control of the damper thermostat 14, the ON/OFF control of the blower 20, the ON/OFF control of the defrosting heater 21 for the cooler, and the ON/OFF control of the defrosting heater 22 for the top cooling plate 16 are performed by a microcomputer. It is carried out by 39. Moisture condensed on the top cooling plate 16 is cooled by the cold air passing through the cooling air passage 17, and becomes frost and adheres to the top cooling plate 16. Therefore, the microcomputer 39 controls the power supply to the top cooling plate defrosting heater 22 at regular intervals to perform defrosting. At the same time, the microcomputer controls the damper thermostat 14 to forcibly close the damper, so that no cold air passes through the cooling air passage 17 during defrosting. Therefore, the heat emitted from the top cooling plate defrosting heater 22 is efficiently transmitted to the top cooling plate 16 without being taken away by cold air. After defrosting is completed, the forced closing command to the damper thermostat 14 is released and normal opening/closing control is resumed. A time chart showing the above control is shown in FIG. 19, and a flow chart is shown in FIG. 20. That is, in FIG. 19, at time t1, the microcomputer 39
In response to this command, the damper thermostat 14 closes, and energization to the defrosting heater 22 of the top cooling plate 16 is started, and during defrosting, efficient defrosting is performed in which cold air does not pass through the cooling air path 17. When defrosting is completed, the microcomputer 39 again sends a command to open the damper to the damper thermostat 14 at time t2, and normal opening/closing control is resumed. In addition, in FIG. 20, it is checked in step 60 whether the defrosting start condition is met, and if so, the next step 6 is performed.
At step 1, the top cooling plate heater 22 is turned ON, and at step 62, the damper thermostat 14 is forcibly closed to perform defrosting. Next step 63
In step 64, it is checked whether the defrosting end condition is met, and if so, in step 64 the top cooling plate heater 22 is turned off, and in step 65 the control of the damper thermostat 14 is returned to normal.

Example 10. FIG. 21 shows a tenth embodiment of the present invention.
0 is a temperature sensor that detects the temperature of the defrosting heater 22 for the top cooling plate, and its output is transmitted to the microcomputer 39. In Example 9, the defrosting heater 22 for the top cooling plate
Although the damper thermostat 14 is forcibly closed while the power is being applied to the 14 is forcibly opened, and the temperature of the defrosting heater 22 is lowered. Furthermore, when the temperature of the defrosting heater 22 reaches Tmin, the microcomputer 39 again controls the damper thermostat 14 to be forcibly closed. As a result, the temperature of the defrosting heater 22 becomes ΔT=Tmax−Tmi
Since the temperature is controlled within the range of n, it is possible to prevent the top cooling plate 16 from being overheated due to unnecessary overheating of the defrosting heater 22, thereby preventing the temperature of the food in the chilled case 7 from rising. Preservability can be improved. The timer chart for this control is shown in Figure 22, and the flowchart is shown in Figure 2.
Shown in 3. That is, in FIG. 23, it is checked in step 70 whether the defrosting start condition is met, and if so, in step 71 the top cooling plate heater 22 is turned on and the damper thermostat 14 is forcibly closed. Step 72
If not, the temperature of the top cooling plate 16 is compared with a predetermined tolerance temperature Tmax in step 73, and if it is greater than Tmax, the damper thermostat 14 is forced in step 74. The temperature of the top cooling plate 16 is lowered. In step 75, it is checked whether the defrosting end condition is met, and if not, in step 78, the temperature of the top cooling plate 16 is compared with the allowable minimum temperature Tmin, and if it is lower than Tmin, the damper thermostat is forcibly activated in step 79. close.

Example 11. Example 11 of the present invention will be described with reference to FIGS. 24 to 28. In FIG. 24, 41 is a control unit that controls the refrigerator-freezer, and 42 is an operation panel that can set the temperature inside the refrigerator compartment 3. FIG. 25 is a block diagram of the control unit, and in the figure, 39 is a CPU 39a, a RAM 39b,
A microcomputer includes a ROM 39c, an input section 39d, and an output section 39e; 43 is a thermistor for detecting the internal temperature of the freezer compartment 2; and 44 is a thermistor for detecting the internal temperature of the refrigerator compartment 3. Also, 45 is the microcomputer 3
A drive circuit for operating various actuators by the output signal from 9, 46 a phototriac (light receiving side) for controlling the amount of heat generated by the heater 22, 47 a compressor,
48 is a power supply, and 49 is a frequency detection section of the power supply 48.

Next, the operation will be explained with reference to the heater control flowchart shown in FIG. First, the set temperature of the freezer compartment 2 determined by the operation panel 42 is compared with the temperature detected by the thermistor 43 that detects the internal temperature of the freezer compartment 2 (step 100), and if the internal temperature of the freezer compartment 2 is high, , the compressor 47 and the internal fan 20 are operated (step 101).
, the refrigerant is sent to the cooler 18, and the cold air cooled by the cooler 18 is sent by the internal fan 20 and blown into the freezer compartment 2 to cool the freezer compartment 2. A part of the cold air is then sent to the cold air outlet 13a through the cold air supply path 13 to the refrigerator compartment 3, and the electric damper 14 provided here is used to adjust the refrigerator compartment set temperature to the refrigerator compartment 3.
compares the temperature detected by the thermistor 44 that detects the internal temperature of the refrigerator, controls the amount of cold air flowing in from the cold air outlet 13a (steps 102, 103, 104), and cools the inside of the refrigerator compartment 3 to the set temperature (3° C.) . On the other hand, a part of the cold air flows through the cold air supply path 15 for distribution to the upper surface of the top cooling plate 16 made of a porous material, and then flows through the cold air passage 19 on the outer peripheral surface of the chilled case 7 and the outer bottom surface of the refrigerator. It is released into 3. In this way, since the surface of the top cooling plate through which the supplied cold air flows first has the lowest temperature, the temperature of the inner bottom surface and inner peripheral surface of the chilled case 7, which is the surface on which the built-in food is placed, is The temperature will not be very low, so the internal food will not freeze. In addition, since the top cooling plate 16, which has the lowest temperature, is made of a porous material that can retain moisture, it is possible to retain the evaporated moisture from the food. Since the surface of the surface cooling plate 16 may freeze, the operating time of the compressor 47 is integrated as a means of detecting this ice formation (step 1).
05), if a certain amount of integrated time has elapsed (step 106), and if the temperature detected by the thermistor 40 that detects the temperature near the heater 22 is lower than temperature A (step 108), as shown in FIG. The heater 22 is energized under the following energization conditions (step 112), and the moisture retained by the top cooling plate 16 is evaporated into the cooling air passage 17, and the top cooling plate 1
6 is played. The heater 22 is shut off when the temperature detected by the thermistor 40 that detects the temperature near the heater 22 exceeds temperature A (steps 107, 108,
114). Next, operations other than the defrosting operation will be explained. A description of common items in the defrosting operation will be omitted, but depending on the temperature setting of the refrigerator compartment 3 and the state of the electric damper 14, the heater 22 is energized under the energization conditions shown in FIGS. 27 and 28, and the energization inside the chilled case 7 is constant. (steps 109, 110,
111).

In this embodiment, the case where the amount of heat generated by the heater 22 is varied by controlling the phase using the phototriac 46 has been explained. The amount of heat generated may be changed, and in this case, the same effect as in the above embodiment can be obtained even with a switching device such as a relay.

[0054]

[Effects of the Invention] The present invention provides the following effects. A refrigerator-freezer according to claim 1 is a refrigerator-freezer that forcibly sends cold air generated by a cooler to a refrigerator compartment or other compartments using a blower, and includes a cold room provided in the refrigerator compartment and having an open front part; a chilled case that is housed in a low-temperature chamber and has an open front and top that slides back and forth therein; a common lid that opens and closes the front of the low-temperature chamber and the chilled case;
a top cooling plate that closes the upper part of the chilled case; a cooling air passage formed between the top cooling plate and the cold room; and a cooling air passage formed on the outer peripheral surface of the chilled case that communicates with the cooling air passage. Since the cooling air passage is configured to include a cold air passage that opens into the refrigerator compartment and a cold air supply passage that guides a portion of the cold air generated by the cooler to the cooling air passage, by sealing the cold room, The inside of the chilled case is kept at high humidity.

A refrigerator-freezer according to a second aspect of the present invention is a refrigerator-freezer in which cold air generated by a cooler is forcibly sent to a refrigerator compartment or other compartments using a blower, and a cold room provided in the refrigerator compartment and having an open front part. a chilled case that is housed in the low temperature chamber and has an open front and top that slides back and forth in the low temperature chamber; a common lid that opens and closes the front of the cold chamber and the chilled case; and an upper part of the chilled case. a cooling air passage formed between the top cooling plate and the cold room; and a cold air supply that guides a portion of the cold air generated in the cooler to the cooling air passage. Since the structure includes a cold air return passage that returns this cold air to the cooler, the cold air that has flowed along the top cooling plate is not discharged into the refrigerator compartment.
Since it is returned to the cooling room, the chilled case can be brought to the desired temperature independently.

The refrigerator-freezer according to claim 3 is the refrigerator-freezer according to claim 1 or 2, which includes an upper frame that covers the upper opening of the chilled case and on which a top cooling plate is placed, and a hinge on the upper frame. The fixed frame of the chilled case is provided with a rear protruding frame that forms a part of the cold air passage and has its rear end surface abutted against and fixed to the rear inner wall surface of the cold room. The top cooling plate and chilled case can be positioned accurately.

The refrigerator-freezer according to claim 4 is the refrigerator-freezer according to claim 1 or 2, which is provided on the upper part of the chilled case and is removably attached to the wall of the cold room through an annular frame provided at the periphery of the case. Since the structure includes the engaged top cooling plate, the top cooling plate can be attached and removed without removing the lid and the chilled case.

[0058] The refrigerator-freezer according to claim 5 comprises claims 1, 2,
In the refrigerator-freezer according to item 3 or 4, since the top cooling plate is made of a porous material, excess moisture in the cold room is retained in the top cooling plate made of the porous material.

The refrigerator-freezer according to claim 6 is the refrigerator-freezer according to claim 5, in which the top cooling plate has a hydrophilic porous material having a humidity control function on the cooling air path side, and a water absorption function and a moisturizing function on the chilled case side. Since the structure includes a hydrophilic porous material having a hydrophilic porous material, the inside of the chilled case is kept at high humidity, and drying of the food is suppressed, allowing high-quality storage.

The refrigerator-freezer according to claim 7 is the refrigerator-freezer according to claim 5, in which the top cooling plate is made of a hydrophilic porous material with low porosity on the cooling air path side and a hydrophilic porous material with high porosity on the chilled case side. Since the structure is made with porous material, when the humidity inside the chilled case is low, high-quality storage can be achieved by controlling the absorbed moisture with a surface with low porosity to prevent it from being released too much to the air path side. .

The refrigerator-freezer according to claim 8 is the refrigerator-freezer according to claim 5, 6, or 7, in which the porous material contains a deodorizing catalyst and an antibacterial agent. Due to the action of the catalyst and antibacterial agent, there is no mold or odor inside the chilled case.

[0062] The refrigerator-freezer according to claim 9 comprises claims 1, 2,
In the refrigerator-freezer according to 3, 4, 5, 6, 7 or 8,
Since a heater is provided in the cooling air passage above the top cooling plate, even if ice forms on the top cooling plate, it is melted by the heater provided in the cooling air passage above the top cooling plate.

The refrigerator-freezer according to claim 10 is the refrigerator-freezer according to claim 9, when defrosting the frost attached to the top cooling plate,
While the heater is energized, the configuration has a control means that closes the cold air supply path that guides a portion of the cold air generated by the cooler to the cooling air path, so that it is possible to defrost the top cooling plate of the chilled case. When performing this, the defrosting time is shortened because the cold air supply path is closed.

The refrigerator-freezer according to claim 11 is the refrigerator-freezer according to claim 10, in which the heater is provided with a temperature sensor and has a control means for controlling the temperature of the heater to be kept constant while the heater is energized. This prevents the top cooling plate from overheating due to unnecessary heating, allowing for high-quality storage.

The refrigerator-freezer according to claim 12 is the refrigerator-freezer according to claim 9, further comprising a heater for defrosting the top cooling plate and controlling the temperature inside the chilled case, and means for changing the amount of heat generated by the heater. With this configuration, one heater can defrost the top cooling plate and keep the chilled case warm.

The refrigerator-freezer according to claim 13 is the refrigerator-freezer according to claim 12, in which the means for changing the calorific value of the heater is configured to change the calorific value in accordance with the cumulative operating time of the compressor. It is possible to maintain high humidity inside the chilled case without being affected by the set temperature of the room.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view showing a refrigerator-freezer according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a refrigerator-freezer according to a first embodiment of the present invention.

FIG. 3 is a diagram illustrating a state of moisture reduction in food stored in a refrigerator-freezer according to Example 1 of the present invention.

FIG. 4 is a partial vertical sectional view showing a refrigerator-freezer according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a main part of a refrigerator-freezer according to a third embodiment of the present invention.

FIG. 6 is an enlarged perspective view of main parts of a refrigerator-freezer according to a third embodiment of the present invention.

FIG. 7 is a front view of main parts of a refrigerator-freezer according to a fourth embodiment of the present invention.

FIG. 8 is a side sectional view of a main part of a refrigerator-freezer according to a fourth embodiment of the present invention.

FIG. 9 is a perspective view of a top cooling plate according to a fifth embodiment of the present invention.

FIG. 10 is a perspective view of a top cooling plate according to a sixth embodiment of the present invention.

FIG. 11 is a partial vertical sectional view showing a refrigerator-freezer according to a seventh embodiment of the present invention.

FIG. 12 is a sectional view of a main part of a refrigerator-freezer according to a seventh embodiment of the present invention.

FIG. 13 is a heater circuit diagram of a refrigerator-freezer according to a seventh embodiment of the present invention.

FIG. 14 is a heater circuit diagram of a refrigerator-freezer according to a seventh embodiment of the present invention.

FIG. 15 is a heater circuit diagram of a refrigerator-freezer according to a seventh embodiment of the present invention.

FIG. 16 is a heater circuit diagram of a refrigerator-freezer according to an eighth embodiment of the present invention.

FIG. 17 is a diagram showing the relationship between the deodorizing performance and the heater of a refrigerator-freezer according to Example 8 of the present invention.

FIG. 18 is a partial vertical sectional view showing a refrigerator-freezer according to a ninth embodiment of the present invention.

FIG. 19 is a time chart diagram of a refrigerator-freezer according to a ninth embodiment of the present invention.

FIG. 20 is a flowchart of a refrigerator-freezer according to a ninth embodiment of the present invention.

FIG. 21 is a sectional view of a main part of a refrigerator-freezer according to a tenth embodiment of the present invention.

FIG. 22 is a time chart diagram of a refrigerator-freezer according to Example 10 of the present invention.

FIG. 23 is a flowchart of a refrigerator-freezer according to a tenth embodiment of the present invention.

FIG. 24 is a sectional view of a main part of a refrigerator-freezer according to an eleventh embodiment of the present invention.

FIG. 25 is a control block diagram of a refrigerator-freezer according to an eleventh embodiment of the present invention.

FIG. 26 is a flowchart of a refrigerator-freezer according to an eleventh embodiment of the present invention.

FIG. 27 is a heater terminal voltage diagram of a refrigerator-freezer according to Example 11 of the present invention.

FIG. 28 is a diagram of the heater energization rate of the refrigerator-freezer according to Example 11 of the present invention.

FIG. 29 is a perspective view of a conventional refrigerator-freezer.

FIG. 30 is a vertical cross-sectional view of a main part of a conventional refrigerator-freezer.

[Explanation of symbols]

2 Freezer room (other rooms) 3 Refrigerator room 5. Low temperature chamber 7 Chilled case 8 Lid body 13, 15 Cold air supply path 16 Top cooling plate 16c　Stomata 17 Cooling air path 18 Cooler 19 Cold air passage 20　Blower 22 Heater 30 Upper frame 31 Hinge part 33 Rear protruding frame 35 Annular frame 37 Cold air return passage 39 Microcomputer 40 Temperature sensor 41 Control section

Claims (13)

[Claims] 1. A refrigerator-freezer that forcibly sends cold air generated by a cooler to a refrigerator compartment or other compartments using a blower, comprising: a cold room provided in the refrigerator compartment and having an open front;
A chilled case that is housed in the cold room and has an open front and top that slides back and forth inside the cold room, a common lid that opens and closes the front of the cold room and the chilled case, and a lid that closes the top of the chilled case. a cooling air passage formed between the top cooling plate and the cold room; a cooling air passage connected to the cooling air passage formed on the outer circumferential surface of the chilled case and opening into the refrigerating room; A refrigerator-freezer comprising: a cold air passageway for cooling air; and a cold air supply passageway for guiding part of the cold air generated by the cooler to the cooling air passageway. 2. A refrigerator-freezer that forcibly sends cold air generated by a cooler to a refrigerator compartment or other compartments using a blower, comprising: a cold room provided in the refrigerator compartment and having an open front;
A chilled case that is housed in the low temperature chamber and has an open front and top that slides back and forth inside the cold chamber, a common lid that opens and closes the front of the cold chamber and the chilled case, and a lid that closes the top of the chilled case. a cooling air path formed between the top cooling plate and the cold room; and a cold air supply path that guides a portion of the cold air generated in the cooler to the cooling air path. , and a cold air return passage that returns this cold air to the cooler. 3. An upper frame that covers the upper opening of the chilled case and on which the top cooling plate is placed, and a frame that is connected to the upper frame via a hinge part and forms a part of the cold air passage. Claim 1: A fixed frame for a chilled case, comprising a rear protruding frame whose rear end face is abutted and fixed to a rear inner wall surface of a cold room.
Or the refrigerator-freezer described in 2. 4. A top cooling plate provided on the upper part of the chilled case and removably engaged with the wall of the cold room downward via an annular frame provided on the periphery of the chilled case. The refrigerator/freezer listed. 5. The refrigerator-freezer according to claim 1, wherein the top cooling plate is made of a porous material. Claim 6: The top cooling plate is provided with a hydrophilic porous material having a humidity control function on the cooling air path side, and a hydrophilic porous material having a water absorption function and a moisture retention function on the chilled case side.
The refrigerator/freezer listed. 7. The refrigerator-freezer according to claim 5, wherein the top cooling plate is provided with a hydrophilic porous material having a small porosity on the cooling air passage side and a hydrophilic porous material having a large porosity on the chilled case side. 8. The refrigerator-freezer according to claim 5, wherein the porous material contains a deodorizing catalyst and an antibacterial agent. 9. The refrigerator-freezer according to claim 1, wherein a heater is provided in the cooling air passage above the top cooling plate. [Claim 10] When defrosting frost attached to the top cooling plate,
10. The refrigerator-freezer according to claim 9, further comprising a control means for controlling to close a cold air supply path that guides a part of the cold air generated by the cooler to the cooling air path while the heater is energized. 11. The refrigerator-freezer according to claim 10, further comprising a control means for controlling the temperature of the heater by providing a temperature sensor in the heater and keeping the temperature of the heater constant while the heater is energized. 12. The refrigerator-freezer according to claim 9, further comprising a heater for defrosting the top cooling plate and controlling the temperature inside the chilled case, and means for changing the amount of heat generated by the heater. 13. The means for changing the amount of heat generated by the heater comprises:
13. The refrigerator-freezer according to claim 12, wherein the calorific value is changed according to the cumulative operating time of the compressor.