WO2008026472A1

WO2008026472A1 - Cooling box and cooling device mounted thereon

Info

Publication number: WO2008026472A1
Application number: PCT/JP2007/066142
Authority: WO
Inventors: Masuo Kawabata; Kiyoaki Tanaka
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2006-08-29
Filing date: 2007-08-21
Publication date: 2008-03-06

Abstract

A machine chamber is formed at a position on the right side or left side of the upper part of the back side of a heat-insulated housing of a cooling box, and a part of a cooling device is disposed in the machine chamber. Cool air from a cooling section of the cooling device is supplied to a receiving chamber in the heat- insulated housing through a cool air passage. At least a part of the cool air passage is provided in a section for partitioning the receiving chamber into a predetermined state. The cooling device includes a Stirling refrigerating machine as a constituting element. A high temperature side circulation circuit for taking out hot heat is connected to the high temperature head of the Stirling refrigerating machine, a low temperature side circulation circuit for taking out cold heat is connected to the low temperature head, and the attitude of the Stirling refrigerating machine is set such that the high temperature head is on the top side and the low temperature head is on the bottom side.

Description

Specification

Refrigerator and cooling device mounted on it

Technical field

The present invention relates to a refrigerator and a cooling device mounted on the refrigerator. The term “refrigerator” is used in this specification to mean any device that lowers the temperature of food or other items that are to be cooled. It is called “refrigerator”, “freezer”, “freezer refrigerator”. The name of the product such as “showcase” or “vending machine” may be used.

Background art

[0002] In a refrigerator, for example, a refrigerator, a configuration in which an interior is divided into a plurality of compartments and used separately for a refrigerator compartment and a freezer compartment has become common. In some cases, a chilled room or an ice greenhouse may be provided with a temperature zone between the normal refrigeration and freezing temperatures. In forming a plurality of compartments, a method of dividing the refrigerator body into left and right is also adopted. An example of this can be seen in Patent Document 1.

[0003] In some refrigerators, as in the example described in Patent Document 2, for example, a compressor of a refrigeration cycle is arranged on the top surface of the main body.

[0004] Furthermore, a refrigerator in which a cooling device is configured not by a normal compressor but by a Stirling refrigerator has come to be seen. The refrigerants used in ordinary compressors are specific fluorocarbons (Cr C: chlorofluorocarbon) and prosthetic chlorofluorocarbons (HCrC: hydrochlorofluorocarbon, HF: hydrofluorocarbon). As such, it leads to the destruction of the ozone layer, so its production and use is subject to international regulations. HFCs that do not destroy the ozone layer also have the problem of promoting global warming.

[0005] In view of this, Stirling refrigerators that do not use ozone-depleting substances as refrigerants are in the spotlight. Stirling refrigerators use an inert gas such as helium as the working medium, and the piston and displacer are operated by external power to repeatedly compress and expand the working medium, increasing the temperature of the high-temperature head (heat dissipating part) and the low-temperature head. Lower the temperature of the (heat-absorbing part). And heat is dissipated to the surrounding environment with a high-temperature head, and heat is absorbed from the inside with a low-temperature head. is there. Stirling refrigerators also have the characteristics that they can obtain lower refrigeration temperatures than ordinary compressors. An example of a refrigerator equipped with a cooling device using a Stirling refrigerator can be seen in Patent Document 3. A structural example of a Stirling refrigerator can be seen in Patent Document 4.

[0006] Patent Document 3 describes embodiments of the invention from 1 to 3. In Embodiments 1 and 2, the Stirling refrigerator is arranged with its axis line horizontal, that is, in a horizontal state. In the third embodiment, in addition to the horizontal installation state described in FIGS. 8 and 11 of the same document, a configuration in which the axis of the Stirling refrigerator is vertical, that is, in a vertical installation state as shown in FIG. 10 of the same document. Is also disclosed. In the case of vertical installation, the arrangement is such that the low temperature part is on top and the high temperature part is on the bottom.

Patent Document 1: Japanese Patent Laid-Open No. 9 61050

Patent Document 2: Japanese Unexamined Patent Publication No. 2006-105575

Patent Document 3: Japanese Unexamined Patent Publication No. 2005-3351

Patent Document 4: Japanese Patent Laid-Open No. 2005-345009

Disclosure of the invention

Problems to be solved by the invention

[0007] In the refrigerator, the cold air cooled by the cooling unit of the cooling device is supplied to each section through the cold air passage to obtain a desired temperature. The cold air passage is usually provided on the front side of the heat insulating wall at the back of the heat insulating casing of the refrigerator. As a result, the depth of the internal space of the heat-insulating housing was narrowed toward the front side, preventing effective use of the space. Moreover, in the configuration in which the compressor is arranged on the top surface portion of the heat insulating casing, the arrangement portion protrudes into the internal space, and the internal volume is reduced. None of the refrigerators described in the above patent documents has found a solution to this problem.

[0008] In the apparatus described in Patent Document 3, in a configuration in which the Stirling refrigerator is placed horizontally, the horizontal direction of the Stirling cooling system is used to allow the outside air to smoothly flow to the condenser that radiates heat from the high-temperature part. It is necessary to expand the space occupied by In addition, sufficient heat insulation space or heat insulation structure is necessary so that heat in the high temperature part is not transmitted to the low temperature part. In a configuration in which a Stirling refrigerator is installed vertically, the cold in the upper low-temperature part is cooled with a refrigerant at the bottom of the device. Since it is transported to the cooler and the heat of the lower high-temperature part is transported to the condenser above the device by the refrigerant, the refrigerant pipes are interlaced and the piping work is difficult. Insulating the low-temperature part and the piping in the vicinity of it requires complicated combinations of heat-insulating materials, which takes time. Furthermore, the device described in Patent Document 3 is sufficiently considered for the vibration and noise generated by the Stirling refrigerator! /!

[0009] The present invention has been made in view of the above points, and an object of the present invention is to provide a refrigerator that can improve the utilization of the internal space of the heat insulating casing. In addition, by devising the flow of cold air, it is possible to diversify the storage temperature range and to provide a refrigerator with less energy loss.

[0010] Further, an object of the present invention is a cooling device including a Stirling refrigerator as a component, in which heat insulation between the low temperature part and the high temperature part is easy, and the refrigerant pipe is also attached. It is to provide what becomes. It is also intended to make it easier to control the force, vibration and noise of the cooling system. By installing such a cooling device, it is to provide a refrigerator having a large effective internal volume.

Means for solving the problem

In order to achieve the above object, the present invention is characterized in that a part of the cooling device is arranged in a machine room formed in the cooler in the left or right side of the upper part of the back surface of the heat insulating housing.

[0012] According to this configuration, the machine room is provided at a position on the left side or on the right side of the rear upper portion of the heat-insulating housing. Therefore, it is possible to reduce the protrusion into the warehouse and increase the effective internal volume. it can.

[0013] The present invention provides the cooler configured as described above, wherein the heat insulating casing includes a storage chamber for storing an object to be cooled, and the cool air cooled by the cooling unit of the cooling device is stored in the cooler via the cool air passage. The cool air passage is provided in a partition portion that partitions the storage chamber into a predetermined state.

[0014] According to this configuration, by providing the cool air passage in the partition portion, the cool air passage can be arranged using the space that does not contribute to the storage of the object to be cooled, and the space utilization rate of the refrigerator is improved. . Further, the work for forming the cold air passage is facilitated. [0015] In the refrigerator having the above-described configuration, the partition portion that partitions the storage chamber into a predetermined state includes a vertical partition portion that partitions the storage chamber into a first partition and a second partition, and the vertical direction At least a part of the cold air passage is formed in the partition portion.

[0016] According to this configuration, since the cool air passage is moved from the inner wall of the storage chamber to the vertical partition that separates the first compartment and the second compartment, the force that has been neglected so far, the vertical direction The partition can be used effectively to increase the depth of the storage room. This makes it possible to reduce the thickness of the refrigerator.

[0017] According to the present invention, in the cooler configured as described above, at least a part of the cooling unit of the cooling device is disposed at a level below the lower part of the partition part, and the cool air passage of the partition part is cooled by the cooling part. An up-cooling air passage for raising the cooled air and a down-cooling air passage for lowering the raised cold air are formed, and cold air is supplied from the up-cooling air passage to one of the partitions, and the down-cooling air is supplied to the other. It is characterized by supplying cold air from the passage!

[0018] According to this configuration, the cold air supplied from the descending cold air passage is closer to the cooling device! /, And the temperature is higher than the cold air supplied from the upstream cold air passage! /, So it is stored on both sides of the partition portion. The storage temperature range can be diversified by varying the room temperature.

[0019] The present invention provides the cooler configured as described above, wherein the cool air discharge port located in the upper part of the storage chamber and the cool air discharge port located in the middle part in the vertical direction of the partitioning part with respect to the cool air passage. It is characterized by being provided!

[0020] According to this configuration, the storage chamber is uniformly cooled by the cool air supplied from the upper part and the cool air supplied from the cutting unit at a lower position.

[0021] The present invention is characterized in that, in the cooler having the above-described configuration, at least a part of the cold air discharge ports has a horizontal shape and a slit shape in the horizontal direction.

According to this configuration, the storage chamber is uniformly cooled by the cold air supplied from the horizontally long slit-like cold air discharge port.

[0023] The present invention is characterized in that, in the cooler configured as described above, at least a part of the heat generating portion of the cooling device is disposed in the machine room.

[0024] According to this configuration, since the heat generating part of the cooling device is located above the outside of the storage room, the cooling efficiency with less heat transmitted to the storage room is lower than when the heat generating part is on the lower side. Hard to be damaged.

[0025] The present invention is characterized in that, in the cooler having the above-described configuration, the machine room is disposed outside the compartment on the side to which the cold air is supplied from the descending cold air passage.

[0026] According to this configuration, the heating unit of the cooling device is adjacent to the compartment where the temperature can be higher in comparison with the other compartment, and there is no contradiction in the setting of the cooling temperature of each compartment.

[0027] In the refrigerator having the above-described configuration, the present invention includes a horizontal partition that divides the heat-insulating housing into upper and lower parts, the cooling device includes a Stirling refrigerator as a component, and the Stirling refrigerator A high temperature side condenser is provided above the cooling section, and the cooling section that cools the air with the cold heat of the Stirling refrigerator is positioned below the horizontal partition section.

[0028] According to this configuration, the natural circulation of the refrigerant is performed more stably. Also, since the position of the heat dissipating part and the cooling part of the Stirling refrigerator are largely separated from each other, the heat dissipated is transferred to the cooling part, preventing the realization of the ultra-low temperature cooling expected for Stirling refrigerators. Can be prevented.

[0029] The present invention is a cooling device mounted in the refrigerator having the above-described configuration, and includes a Stirling refrigerator having a high-temperature head and a low-temperature head as constituent elements, and the high-temperature head is provided for the Stirling refrigerator. Is connected to a high temperature side circulation circuit for extracting heat, and the low temperature head is connected to a low temperature side circulation circuit for extracting heat, so that the high temperature head is on and the low temperature head is on the Stirling refrigerator. It is characterized by having set the attitude of.

[0030] According to this configuration, the heat release cycle including the high temperature head and the high temperature side circulation circuit and the cooling cycle including the low temperature head and the low temperature side circulation circuit can be separated without difficulty. Piping work is also easy. In addition, since the structure near the low-temperature head is not complicated, it is easy to form a heat insulation structure.

[0031] In the cooling device having the above-described configuration, the secondary refrigerant pipe of the high-temperature side circulation circuit extends upward after being led out from the high-temperature side evaporator thermally connected to the high-temperature head, The secondary refrigerant piping of the circulation circuit is derived from a low-temperature side condenser thermally connected to the low-temperature head and then extends downward. [0032] According to this configuration, the heat release cycle and the cooling cycle are completely separated, and a sufficient heat insulating space can be secured between them.

[0033] The present invention provides the cooling device having the above-described configuration, wherein the high-temperature side circulation circuit includes a high-temperature side evaporator thermally connected to the high-temperature head and a high-temperature side condenser for heat dissipation by a secondary refrigerant pipe. The secondary refrigerant is connected to allow natural circulation of the secondary refrigerant, and a power unit of the Stirling refrigerator is arranged between the high temperature side evaporator and the high temperature side condenser.

[0034] According to this configuration, the difference in height between the high-temperature side evaporator and the high-temperature side condenser can be ensured large enough to naturally circulate the secondary refrigerant. As a result, the heat dissipation efficiency is improved, and the space between the high temperature side evaporator and the high temperature side condenser is used for the arrangement of the power unit of the Stirling refrigerator, so that the space can be used effectively.

[0035] In the cooling apparatus having the above-described configuration, the present invention is configured such that the high-temperature side condenser and the heat-dissipating fan for forcibly cooling the support support the mounting legs of the Stirling refrigerator or the Stirling refrigerator itself. It is characterized by being held in space.

[0036] According to this configuration, since the high-temperature side condenser and the blower are supported together with the Stirling refrigerator, when the Stirling refrigerator is operated, they integrally vibrate, and it is easy to take measures against vibration. .

[0037] According to the present invention, in the cooling device having the above-described configuration, the high-temperature side condenser and the heat-dissipating fan that forcibly cools the high-temperature side condenser are held in the space with the mounting legs of the Stirling refrigerator as a support, It is characterized in that vibration absorbing means is interposed between the mounting leg and a support member that supports the mounting leg.

[0038] According to this configuration, the action of the vibration absorbing means on the Stirling refrigerator can be exerted on the high-temperature side condenser and the heat dissipating fan, and the force S can be reduced by reducing the vibration level of these components all at once.

In the present invention, the Stirling refrigerator of the cooling device having the above-described configuration is disposed in a recess at the upper back of the heat insulating housing, and the heat insulating housing is positioned below the Stirling refrigerator. It is a refrigerator having a heat exchanger for cooling.

[0040] According to this configuration, the Stirling refrigerator is disposed in the recess at the upper back of the heat insulating casing, while the cooling heat exchanger is positioned below the Stirling refrigerator in the heat insulating casing. Therefore, it is possible to provide a cooler with a rational structure in which the heat release cycle and the cooling cycle are separated easily. The piping configuration is also easy to assemble, making assembly work easier.

[0041] In the refrigerator according to the present invention, the machine room in which a part of the cooling device is arranged is formed at the left side or the right side above the rear surface of the heat insulating housing, so that the protrusion into the chamber is small and effective. The internal volume can be increased.

[0042] In addition, since the cooler according to the present invention has the cool air passage in the partition that partitions the storage chamber into a predetermined state, the space utilization rate of the cooler can be improved, and the interior of the storage chamber of the refrigerator can be covered. It can be used effectively for storing cooling objects. For example, a cool air passage is provided in the partition that partitions the storage chamber, that at least a part of the cool air passage is formed in the vertical partition, and a cooling device at the left or right corner above the back of the heat insulating housing. The inside of the storage chamber can be used effectively for storing the object to be cooled, for example, by forming a recess for arranging a part of the storage space. In addition, it is possible to obtain an easy-to-use thin refrigerator by reducing the external dimensions of the refrigerator in the depth direction without compromising the internal volume.

[0043] Furthermore, the cool air passage of the partition is not a straight line but is continuous from the up cool air passage to the down cool air passage, and is separated from the up cool air passage by the partition portion, and from the down cool air passage to the other Since the cool air is supplied to each, the storage temperature is varied on both sides of the partition using the temperature difference of the cool air that naturally occurs in the ascending cool air passage and the descending cool air passage. In addition, since the compartments are on both sides of the partition, and the cold heat is released to each compartment, a refrigerator with less energy loss can be obtained.

[0044] Further, the cooling device according to the present invention is connected to a high-temperature head, a high-temperature side circulation circuit for extracting heat, and the low-temperature head is connected to a Stirling refrigerator equipped with a high-temperature head and a low-temperature head. By connecting the low temperature side circulation circuit and setting the attitude of the Stirling refrigerator so that the high temperature head is up and the low temperature head is down, the heat dissipation cycle including the high temperature head and the high temperature side circulation circuit, the low temperature head and The cooling cycle including the low-temperature side circulation circuit can be separated without waste. Piping work is also easy. In addition, the structure near the low-temperature head is complicated! /, So it is easy to form a heat insulation structure. [0045] Further, according to the present invention, the Stirling refrigerator of the cooling device is disposed in the recess at the upper back of the heat insulating casing of the refrigerator, and the cooling casing is used for cooling at a position below the Stirling refrigerator inside the insulating casing. Therefore, it is possible to provide a cooler with a rational structure in which the heat release cycle and the cooling cycle are separated without difficulty and the piping configuration is also satisfactory.

Brief Description of Drawings

[FIG. 1] Front view of the refrigerator according to the first embodiment.

[Fig. 2] Front view with the heat insulation door of the refrigerator of the first embodiment opened.

[Fig. 3] Vertical sectional view of the refrigerator of the first embodiment

[Fig. 4] Horizontal sectional view of the refrigerator of the first embodiment taken along line A—A in FIG.

FIG. 5 is a schematic configuration diagram of a cooling device mounted in the refrigerator of the first embodiment.

[Fig. 6] Partial vertical sectional view of the cooling device mounting location of the refrigerator of the first embodiment.

[Fig. 7] Top view of Stirling refrigerator supported by support member

[Figure 8] Top view of support member

FIG. 9 is a partial vertical sectional view showing a first modified embodiment of a cooling device mounting location in the refrigerator of the first embodiment.

FIG. 10 is a partial vertical sectional view showing a second modified embodiment of the cooling device mounting location in the refrigerator of the first embodiment.

FIG. 11 is a partial vertical sectional view showing a third modified embodiment of the cooling device mounting location in the refrigerator of the first embodiment.

FIG. 12 is a partial vertical sectional view showing a fourth modified embodiment of the cooling device mounting location in the refrigerator of the first embodiment.

FIG. 13 is a partial vertical sectional view showing a fifth modified embodiment of the cooling device mounting location in the refrigerator of the first embodiment.

FIG. 14 is a front view of a refrigerator according to the second embodiment.

[Fig. 15] Front view of the second embodiment with the heat insulation door removed.

[FIG. 16] Vertical sectional view of the refrigerator of the second embodiment

[Fig. 17] Vertical sectional view of different parts of the refrigerator of the second embodiment.

FIG. 18 is a diagram illustrating the configuration of the cold air passage of the refrigerator according to the second embodiment. [Fig. 19] Horizontal sectional view of the refrigerator of the second embodiment cut along line BB in Fig. 17.

[Fig.20] Enlarged horizontal sectional view of the vertical partition

FIG. 21 is a schematic configuration diagram of a cooling device mounted in the refrigerator of the second embodiment.

FIG. 22 is a partial vertical sectional view of the cooling device mounting portion of the refrigerator of the second embodiment.

FIG. 23 is a schematic perspective view of a cooling device mounted in the refrigerator of the second embodiment.

FIG. 24 is a block diagram showing the flow of cold air in the refrigerator of the second embodiment.

FIG. 25 is a partial vertical sectional view showing a first modified embodiment of a cooling device mounting location in the refrigerator of the second embodiment.

FIG. 26 is a partial vertical sectional view showing a second modified embodiment of the cooling device mounting location in the refrigerator of the second embodiment.

FIG. 27 is a partial vertical sectional view showing a third modified embodiment of the cooling device mounting location in the refrigerator of the second embodiment.

FIG. 28 is a partial vertical sectional view showing a fourth modified embodiment of the cooling device mounting location in the refrigerator of the second embodiment.

FIG. 29 is a partial vertical sectional view showing a fifth modified embodiment of the cooling device mounting location in the refrigerator of the second embodiment.

FIG. 30 is a vertical sectional view showing a deformation mode of the cold air discharge port in the cooler of the second embodiment. FIG. 31 is a configuration explanatory diagram of a cold air passage showing a deformation mode of the cold air discharge port in the cooler of the second embodiment.

FIG. 32 is a horizontal sectional view showing a deformation mode of the vertical partition in the refrigerator of the second embodiment.

FIG. 33 is a horizontal sectional view showing another modification of the vertical partition in the refrigerator according to the second embodiment.

FIG. 34 is an enlarged horizontal sectional view showing a deformation mode of the vertical partition in the refrigerator of the second embodiment.

Explanation of symbols

1 Refrigerator , 14 Horizontal partition

, 13 Vertical partition

First division

Second division

Section 3

4th section

Temperature switching section

First insulated door

Second insulated door

Third insulated door

4th insulation door

5th insulation door

Concave (machine room)

51, 54, 63, 66 Cold air passage

U Ascending cold passage

D Down cold air passage

61 transverse cold air passage

58, 60, 62, 62A, 65, 70 Cold air discharge P0 Cooling device

0 Stirling refrigerator

1 High temperature head

2 Low temperature head

0 Hot side circulation circuit

1 Hot side evaporator

2 High temperature side condenser

3 Secondary refrigerant piping

4 Heat dissipation fan

5 Duct 130 Low temperature side circulation circuit

131 Low temperature side condenser

132 Low temperature evaporator

133 Secondary refrigerant piping

150 High-temperature side second circulation circuit

151 heat exchanger

160 Dew protection section

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a first embodiment of the present invention will be described with reference to FIG. The refrigerator in this embodiment is used as a refrigerator. The refrigerator 1 includes a heat insulating housing 10.

[0049] The inside of the heat insulating housing 10 serves as a storage chamber. In this specification, “storage room” refers to a compartment in the refrigerated temperature zone (0 ° C to 10 ° C) and a temperature zone slightly lower (up to about minus 3 ° C). Excludes temperature zones where chilled and partial names are used, refrigeration temperature zones (minus tens of degrees or less), high temperature zones (eg, 50 ° C to 80 ° C), and refrigeration temperature zones It is a general term for spaces used for storage (for storage) of food (including seasonings), chemicals, and cosmetics that are to be cooled, such as compartments between the high temperature zone and the freezing temperature zone. Further, in this specification, the left side of the observer facing the front surface of the heat insulating housing 10 is defined as the left side of the heat insulating housing 10, and the right side of the observer is defined as the right side of the heat insulating housing 10.

[0050] The heat insulating casing 10 has an opening for taking in and out food on the front surface, and the opening is closed with a heat insulating door. As shown in FIG. 2, the interior of the heat insulating housing 10 is divided into upper, lower, left and right, the upper left is the first partition 15, the upper right is the second partition 16, the lower left is the third partition 17, and the lower right is the first. There are four compartments. A first heat insulating door 20 is provided at the front opening of the first partition 15, a second heat insulating door 21 is provided at the front opening of the second partition 16, and a front opening of the third partition 17 is provided. A third heat insulating door 22 is provided, and a fourth heat insulating door 23 is provided at the front opening of the fourth partition 18. The 1st heat insulation door 20 and the 3rd heat insulation door 22 rotate centering on the hinge part provided in the left side toward the 2nd heat insulation door 21 and the 4th heat insulation door 23 are the hinge parts provided in the right side toward Rotate around the center. The first heat insulating door 20, the second heat insulating door 21, the third heat insulating door 22, and the fourth heat insulating door 23 are provided with a hand 20H, 21H, 22H, 23H. [0051] It should be noted that any one or some of the first partition 15 to the fourth partition 18 may be further divided to install a fifth partition, a sixth partition, etc. Not shown! /,).

[0052] The first partition 15 and the second partition 16 are used as a refrigerator compartment. The first partition 15 is divided into a plurality of stages by a plurality of shelves 30. A drawer-type case 31 is arranged under the lowest shelf 30. The second partition 16 is also divided into a plurality of stages by a plurality of shelves 32. A drawer-type case 33 is arranged below the lowest shelf 32. A rack 36 (see FIG. 3) for storing bottles and beverage paper packs is attached to the inner surfaces of the first heat insulation door 20 and the second heat insulation door 21.

[0053] The third partition 17 and the fourth partition 18 are used as freezing rooms. A total of 3 case cases 40a, 40b, 40c force are inserted into the third partition section 17 (a total of 4 case cases 41a, 41b, 41c, 41d forces are inserted so as to overlap each other vertically) 40a, 40b, 40c are supported on the inner surface of the third partition 17 by the edges on both sides, and cases 41a, 41b, 41c, 41d are supported on the inner surface of the fourth partition 18 by the edges on both sides. Can be pulled out by sliding it forward.

[0054] Since the third compartment 17 and the fourth compartment 18 have a heat insulation structure thicker than the refrigeration compartment as a freezer compartment, they are divided as necessary, and an independent compartment specialized in ice making is installed, From quick freezing to thawing, it is possible to set up an independent section suitable for various required temperature settings.

[0055] The interior of the refrigerator 1 is cooled by the cooling device 100 shown in FIG. The central presence of components included in the cooling device 100 is the S Stirling refrigerator 110. The Stirling refrigerator 110 generates heat and cold by a reverse Stirling cycle. The heat is mainly removed from the high temperature head 111 as waste heat, and the cold is extracted from the low temperature head 112.

[0056] The structure of the Stirling refrigerator 110 is basically the same as that described in Patent Document 4, in which components such as a displacer, a piston, and a linear motor that drives the piston are arranged, and the external shape is It has a rotating body shape with an axis. The Stirling refrigerator 110 is arranged with its axis vertically set so that the high temperature head 111 is on the top and the low temperature head 112 is on the bottom. The power unit 113 containing the linear motor is further connected to the high temperature head 111. Located on the top.

The high temperature side circulation circuit 120 extracts heat from the high temperature head 111 and dissipates it. The high temperature side circulation circuit 120 is filled with water (including an aqueous solution) or a hydrocarbon refrigerant as a secondary refrigerant. “Secondary refrigerant” is defined by defining the working medium inside Stirling refrigerator 110 as “primary refrigerant” and the working medium used for heat transport outside Stirling refrigerator 110 as “secondary refrigerant”. . Incidentally, the “tertiary refrigerant” described later is a refrigerant that exchanges heat with a secondary refrigerant.

[0058] The high-temperature side circulation circuit 120 is a thermosiphon circulation circuit that naturally circulates the secondary refrigerant. The high-temperature head circuit 120 is a high-temperature head mounted in a state in which heat is transferred between the high-temperature heads 111, that is, in a thermally connected state. It includes a side evaporator 121, a high temperature side condenser 122 disposed on the Stirling refrigerator 110, and a secondary refrigerant pipe 123 connecting the high temperature side evaporator 121 and the high temperature side condenser 122. The high temperature side condenser 122 functions as a heat exchanger for heat dissipation.

[0059] The high-temperature side evaporator 121 is formed by molding a metal having good heat conductivity such as copper, copper alloy, or aluminum into a hollow ring shape. The high-temperature side evaporator 121 is fitted to the outer peripheral surface of the high-temperature head 111 and heats the high-temperature head 111. Connected. A secondary refrigerant pipe 123 is led out from the side surface of the high temperature side evaporator 121. The secondary refrigerant pipe 123 is led out from the side surface of the high temperature side evaporator 121 and then extends upward. And it is connected to the high temperature side condenser 122 above the Stirling refrigerator 110. The secondary refrigerant pipe 123 is composed of a gas phase pipe 123G that sends the vaporized secondary refrigerant to the high temperature side condenser 122 and a secondary refrigerant that has condensed into a liquid at the high temperature side condenser 122 and is on the high temperature side. Divided into a liquid phase pipe 123L that returns to the evaporator 121!

[0060] The high-temperature side condenser 122 is made of copper or copper alloy! /, Good heat conduction! /, A pipe 122a made of a metal material is bent, and a large number of heat radiation made of a metal material also having good heat conduction is made. It is the structure where fin 1 22b was attached. A heat radiating fan 124 for forced air cooling is combined with the high temperature side condenser 122.

The low-temperature head 112 is thermally connected to the low-temperature side circulation circuit 130. The low temperature side circulation circuit 130 is filled with a natural refrigerant such as carbon dioxide (CO 2) as a secondary refrigerant. Low temperature circuit 1

2

30 includes a low-temperature side condenser 131 mounted in a state of being thermally connected to the low-temperature head 112, a low-temperature side evaporator 132 installed in the heat insulating casing 10 of the refrigerator 1, and a low-temperature side condenser 131 A secondary refrigerant pipe 133 connecting the low temperature side evaporator 132 is included. The low temperature side evaporator 132 functions as a cooling unit of the cooling device 100.

[0062] The low-temperature side condenser 131 is formed by molding a metal having good thermal conductivity such as copper, copper alloy, or aluminum into a hollow ring shape. The low-temperature side condenser 131 is fitted to the outer peripheral surface of the low-temperature head 112, and the low-temperature head 112 is heated. Connected. A secondary refrigerant pipe 133 is led out from the side surface of the low temperature side condenser 131. The secondary refrigerant pipe 133 is led out from the side surface of the low-temperature side condenser 131 and then extends downward. Then, it enters the inside of the heat insulating casing 10 and is connected to the low temperature side evaporator 132. The secondary refrigerant pipe 133 is composed of a liquid-phase pipe 133L that causes the secondary refrigerant that has been condensed into a liquid by the low-temperature side condenser 131 to flow down to the low-temperature side evaporator 1 32 and vaporized by the low-temperature side evaporator 132 to form a gas. It is divided into a gas-phase pipe 133G for returning the secondary refrigerant thus obtained to the low-temperature side condenser 131.

[0063] Similarly to the high-temperature side condenser 122, the low-temperature side evaporator 132 is made of a plurality of heat-absorbing fins made of a metal material having a good heat conductivity after bending a pipe 132a made of a metal material having a good heat conductivity such as copper or a copper alloy. 132b is attached.

When the Stirling refrigerator 110 is operated, the temperatures of the power unit 113, the high temperature head 111, and the high temperature side circulation circuit 120 are increased. That is, these become the heat generating part of the cooling device 100. On the other hand, the temperature of the low temperature head 112 and the low temperature side circulation circuit 130 is lowered.

The cooling device 100 is mounted in the refrigerator 1 as follows.

[0066] A recess 46 serving as a machine room is formed in the upper part of the rear surface of the heat insulating casing 10, that is, the corners of the upper surface and the rear surface (see FIGS. 3, 4, and 6). The recess 46 is provided at a position biased to the left when the heat-insulating housing 10 is viewed from the front, that is, at a position on the left side of the back of the first partition portion 15. The recess 46 accommodates a part of the Stirling refrigerator 110, the high temperature side evaporator 121, the high temperature side condenser 122, the secondary refrigerant pipe 123, the heat dissipation fan 124, the low temperature side condenser 131, and the secondary refrigerant pipe 133. . After all the elements to be accommodated are accommodated, the upper and rear openings of the recess 46 are closed with appropriate ventilation grills.

[0067] In this way, the heat generating part of the cooling device 100 is in the first compartment 15 used as a refrigerator compartment, which has a higher temperature than the third compartment 17 and the fourth compartment 18 used as the freezer compartment. Since they are arranged adjacent to each other, the thermal insulation layer between them can be made thinner than in the case where they are arranged next to the third partition part 17 and the fourth partition part 18. [0068] Further, since the heat generating part of the cooling device 100 is arranged in the concave part 46 formed in the corner on the left side above the rear surface of the heat insulating casing 10, the whole corner part behind the ceiling part of the storage room is disposed therein. However, the protrusion 46 does not protrude into the storage chamber, and the protrusion 46 protrudes into the storage chamber, so that the effective internal volume of the storage chamber can be increased.

[0069] The heat insulating wall on the left side as viewed from the front of the concave portion 46 can be removed, and the concave portion 46 can be moved to the left side by the thickness of the heat insulating wall. In this way, the protrusion of the recess 46 into the storage chamber is further reduced, the effective internal volume of the storage chamber is increased, and the volumetric efficiency is further improved.

The recess 46 can also be formed in the vicinity of the right-hand corner of the upper part of the back surface of the heat insulating housing 10. The effects in this case are the same as described above.

[0071] In supporting the Stirling refrigerator 110 inside the recess 46, a support member 140 (see FIG. 8) is used. The support member 140 is a frame having a frame shape formed as a separate part from the heat insulating casing 10, and is horizontally fixed to an intermediate height of the recess 46 by appropriate fixing means. An opening 141 through which the secondary refrigerant pipe 123 of the Stirling refrigerator 110 and the high-temperature side circulation circuit 120 passes is formed inside the support member 140. In the opening 141, overhanging portions 142 for supporting a vibration absorber described below from below are formed at four locations.

[0072] A flange-like mounting leg 114 (see Fig. 7) formed by pressing a sheet metal is fixed to the outer surface of the power unit 113 of the Stirling refrigerator 110 by appropriate means such as welding. The mounting leg 114 is formed with four leg portions 114a whose tip ends overlap the overhanging portion 142 of the support member 140 in four radial positions. The mounting legs 114 are not limited to press-formed products. It may be a die-cast product. It may be an injection-molded high strength synthetic resin material such as MC nylon.

[0073] The Stirling refrigerator 110 is inserted from above into the opening 141 of the support member 140 with the axis line vertical so that the low-temperature head 112 comes to the bottom and the high-temperature head 111 comes on top. Is done. The weight of the Stirling refrigerator 110 is the force supported by the overhanging portion 142 supporting the leg portion 114a of the mounting leg 114. At that time, vibration absorbing means is interposed between the overhanging portion 142 and the leg portion 114a. . In the embodiment, the columnar vibration absorber 143 made of an elastic material such as rubber constitutes the vibration absorbing means.

[0074] The vibration absorber 143 is provided with a Stirling refrigerator 110 at the center of the four overhanging parts 142. The role of supporting the side surface of the portion 113 so as not to contact the overhanging portion 142 is required. Therefore, the vibration absorber 143 is held by an appropriate connecting means so as not to be displaced or dropped from between the overhanging portion 142 and the leg portion 114a. As the connecting means, well-known machine elements such as bolts, nuts, and washers can be used.

The high temperature side circulation circuit 120 is connected to the high temperature head 111 before the Stirling refrigerator 110 is attached to the support member 140. In that state, the portions of the low temperature head 1 12 and the high temperature head 111 of the Stirling refrigerator 110, the high temperature side evaporator 121, and the secondary refrigerant pipe 123 are inserted into the opening 141 of the support member 140, The leg portion 114 a of the mounting leg 114 is seated on the upper surface of the vibration absorber 143.

The high temperature side condenser 122 is positioned above the Stirling refrigerator 110 while being supported by the secondary refrigerant pipe 123. In FIG. 5, only one gas-phase pipe 123G and one liquid-phase pipe 123L are shown. However, in the actual configuration, as shown in FIG. 7, two gas-phase pipes 123G and two liquid-phase pipes 123L are shown. Exists.

A heat radiating fan 124 is connected to the lower surface of the high temperature side condenser 122 via a duct 125. The blowing direction of the heat release fan 124 may be a direction in which wind is blown to the high temperature side condenser 122 or may be a direction in which wind is taken in through the high temperature side condenser 122.

The low temperature side circulation circuit 130 is a stage where the Stirling refrigerator 110 is attached to the support member 140 or in front of it, and the low temperature head 112 passes through the opening 141 and heads under the support member 140. At the stage of taking out, it is connected to the low temperature head 112.

[0079] When the Stirling refrigerator 110 is assembled to the support member 140 and the connection of the high temperature side circulation circuit 120 and the low temperature side circulation circuit 130 to the Stirling refrigerator 110 is completed, that is, in the state of FIG. The power unit 113 of the Stirling refrigerator 110 is disposed between the condenser 121 and the high temperature side condenser 122. With this configuration, the height difference between the high-temperature side evaporator 121 and the high-temperature side condenser 122 can be ensured to be large enough to naturally circulate the secondary refrigerant. As a result, the heat radiation efficiency is improved, and the space between the high temperature side evaporator 121 and the high temperature side condenser 122 is used for the arrangement of the power unit 113 of the Stirling refrigerator 110, so that the space can be effectively used.

[0080] In the state shown in FIG. 6, the heat dissipating fan 124 that forcibly air-cools the high temperature side condenser 122 is also on the high temperature side. It is arranged between the evaporator 121 and the high temperature side condenser 122. This configuration also helps to increase the height difference between the high temperature side evaporator 121 and the high temperature side condenser 122.

[0081] The secondary refrigerant pipe 123 of the high temperature side circulation circuit 120 is led out from the high temperature side evaporator 121 and then extends upward toward the high temperature side condenser 122 above the Stirling refrigerator 110. The secondary refrigerant pipe 133 of the low temperature side circulation circuit 130 is led out from the low temperature side condenser 131 and then extends downward toward the low temperature side evaporator 132 below the Stirling refrigerator 110. The secondary refrigerant pipe 123 from the high-temperature side evaporator 121 on the upper side is directed upward, and the secondary refrigerant pipe 133 from the lower-temperature side condenser 131 on the lower side is directed downward. Because of the composition, the cooling cycle including the low temperature head 112 and the low temperature side circulation circuit 130 and the heat radiation cycle including the high temperature head 111 and the high temperature side circulation circuit 120 can be separated without waste. The piping work is also easy.

[0082] If the low temperature side evaporator 132 is biased to the side where the Stirling refrigerator 110 is present when viewed from the front, the secondary refrigerant pipe 133 can be more easily routed, and the circulation efficiency of the secondary refrigerant can be improved. improves. In addition, if the connection between the secondary refrigerant pipe 133 and the low-temperature side evaporator 132 is also provided on the side where the Stirling refrigerator 110 is provided, the secondary refrigerant pipe 133 can be routed more easily and the circulation efficiency of the secondary refrigerant can be increased. Is further improved.

[0083] Since the structure in the vicinity of the low-temperature head 112, in particular, the piping structure is not complicated, it is easy to form a heat insulating structure so as to surround it. In FIG. 6, the thermal insulator 144 surrounding the low-temperature head 112 and the secondary refrigerant pipe 133 is indicated by phantom lines. The heat insulator 144 can be formed by a method that encloses a predetermined space and performs urethane foaming in the space, or a combination of a plurality of foamed urethane blocks!

[0084] The high-temperature side condenser 122, the heat radiating fan 124, and the duct 125 are held in the internal space of the recess 46 by the secondary refrigerant pipe 123, supporting the Stirling refrigerator 110 itself! For this reason, the high temperature side condenser 122 and the heat radiating fan 124 are supported together with the Stirling refrigerator 110, and the vibration absorbing action of the vibration absorber 143 can also be exerted on the high temperature side condenser 122 and the heat radiating fan 124. The vibration level of these components can be reduced at once.

In addition, when attaching the Stirling refrigerator 110 to the support member 140, The Stirling refrigerator 110 connected to the ring circuit 120 is passed through the opening 141 of the support member 140 from above, and then the low temperature side circulation circuit 130 is connected to the low temperature head 112 to facilitate assembly.

The low temperature side evaporator 132 is placed in a position below the Stirling refrigerator 110 inside the heat insulating casing 10. That is, the cooling ducts 250 and 251 force S extending in the vertical direction along the inner wall on the back side are provided inside the heat insulating casing 10. The cooling duct 250 is located on the back side, and the cooling dust 251 is located on the front side thereof. At the lower end of the cooling duct 250, there is an air inlet 252 force S that sucks the air in the cabinet. The low temperature side evaporator 132 is installed in the cooling duct 250 at a position above the air inlet 252. A fan 253 for blowing air to the cooling duct 251 is provided above the low temperature side evaporator 132.

[0087] When the operation of the Stirling refrigerator 110 starts, heat is generated in the high-temperature head 111.

The secondary refrigerant inside the high-temperature side evaporator 121 is evaporated by the heat to become a gas, and the heat is held as latent heat. The gasified secondary refrigerant rises in the gas-phase pipe 123G and enters the high-temperature side condenser 122, where it condenses and sensible heat of latent heat. The sensible heat is dissipated from the surface of the high-temperature side condenser 122 to the outside. The wind blown from the heat dissipation fan 124 helps heat dissipation. The secondary refrigerant that has condensed and turned down descends the liquid phase pipe 123L and returns to the high-temperature side evaporator 121.

Yes

The cold head 112 generates cold heat. The gaseous secondary refrigerant inside the low-temperature side condenser 131 is condensed by the cold and becomes a liquid, and the cold is held as latent heat. The liquefied secondary refrigerant descends through the liquid phase pipe 133L and enters the low temperature side evaporator 132, where it evaporates due to the heat in the refrigerator 1. The cold heat becomes sensible heat by the evaporation of the secondary refrigerant. The secondary refrigerant that has evaporated to gas goes up the gas-phase pipe 133G and returns to the low-temperature side condenser 131.

[0089] When the fan 253 is operated in a state where the cold heat is sensible in the low temperature side evaporator 132, the air sucked from the intake port 252 at the lower end of the cooling duct 250 is cooled by the low temperature side evaporator 132 and becomes cold air. Into the cooling duct 251. The cold air is blown out to the first partition 15, the second partition 16, the third partition 17, and the fourth partition 18 through the air outlet 254 formed at a predetermined location of the cooling duct 251, and each partition is brought to a predetermined temperature. Cooling.

[0090] When the operation of the Stirling refrigerator 110 is continued, the moisture in the air in the heat insulating housing 10 It forms frost and adheres to the low-temperature evaporator 132. Since frost lowers the heat exchange efficiency of the low-temperature evaporator 132, the defrost heater (not shown) is energized at an appropriate timing to defrost the low-temperature evaporator 132. The defrosted water in which the frost has melted is received by the drain pan 260 at the bottom of the cooling duct 250, and then drained through the drain pipe 261 to the evaporating dish 262 outside the refrigerator. The water in the evaporating dish 262 is evaporated by natural evaporation or by forced evaporation by an appropriate heater means. The evaporating dish 262 can be pulled out to throw away water.

[0091] Since the refrigerator 1 is configured as described above, if the first heat insulating door 20 is opened by placing the hand on the handle 20H, the object can be taken in and out of the first partition 15 and the handle 21H is handled. If you open the second heat insulation door 21, you can put things in and out of the second compartment 16, and if you hold the handle 22H and open the third heat insulation door 22, you can put things in and out of the third compartment 17 and hand in the handle 23H. When the fourth heat insulation door 23 is opened, the object can be taken in and out of the fourth compartment 18.

A modified embodiment of the first embodiment is shown in FIG. In each modified embodiment, most of the structure is the same as that in the embodiment of FIG. 6. Therefore, common parts are denoted by the same reference numerals as those in the previous embodiment, and will not be described unless necessary.

In the first modified embodiment shown in FIG. 9, the positions of the high temperature side condenser 122 and the heat radiating fan 124 are reversed from those in the embodiment of FIG. That is, in the embodiment of FIG. 6, the heat dissipation fan 124 is disposed below the high temperature side condenser 122, but in the first modified embodiment, the heat dissipation fan 124 is disposed above the high temperature side condenser 122. By doing so, the length of the secondary refrigerant pipe 123 in the height direction can be saved as compared with the case of the first embodiment.

In the embodiment of FIG. 6 and the first modified embodiment of FIG. 9, no special consideration is given to the holding of the high-temperature side condenser 122 and the heat dissipating fan 124. The modified embodiment below the second modified embodiment devised this point.

In the second modified embodiment shown in FIG. 10, the arrangement of the high temperature side condenser 122 and the heat radiating fan 124 is the same as the embodiment of FIG. Here, an L-shaped stay 145 made of sheet metal was fixed to the mounting leg 114, and a duct 125 was fixed to the top of the stay 145. As a result, the duct 125 and the high-temperature side condenser 122 and the radiating fan 124 connected to the duct 125 are held firmly in the recess 46. The number of stays 145 is not limited to one, and a plurality of stays 145 may be used. In the third modified embodiment shown in FIG. 11, the arrangement of the high temperature side condenser 122 and the heat radiating fan 124 is the same as that of the embodiment of FIG. Here, a sheet metal stay 146 that holds the Stirling refrigerator 110 at the base is fixed to the outer peripheral surface of the power unit 113, and a duct 125 is fixed to the upper part of the stay 146. The number of stays 146 is not limited to one, and a plurality of stays 146 may be used.

In the fourth modified embodiment shown in FIG. 12, the arrangement of the high temperature side condenser 122 and the heat radiating fan 124 is the same as that of the first modified embodiment. Here, the stay 145 of the second modified embodiment is fixed to the mounting leg 114, and the high-temperature side condenser 122 is fixed to the upper portion of the stay 145. The number of stays 145 is not limited to one, but more than one may be used! /.

In the fifth modified embodiment shown in FIG. 13, the arrangement of the high temperature side condenser 122 and the heat radiating fan 124 is the same as that of the first modified embodiment. Here, an L-shaped stay 147 made of sheet metal is fixed to the upper surface of the power unit 113 of the Stirling refrigerator 110, and the high-temperature side condenser 122 is fixed to the upper part of the stay 147. The number of stays 147 is not limited to one, and a plurality of stays 147 may be used.

[0099] As another modified embodiment, a structure in which the stay 145 fixed to the mounting leg 114 and the stays 146 and 147 fixed to the power unit 113 of the Stirling refrigerator 110 can be combined.

[0100] In each of the above embodiments, the Stirling refrigerator 110 is disposed in a recess 46 provided near the left corner of the upper part of the back surface of the heat insulating casing 10. When the concave portion 46 is placed at this position, the protrusion of the concave portion 46 into the chamber is reduced, and the effective internal volume in the chamber can be increased. The effect is the same even if the recess 46 is arranged near the right corner of the upper part of the rear surface of the heat insulating housing 10.

[0101] The heat insulating wall on the left side as viewed from the front of the concave portion 46 can be removed, and the concave portion 46 can be moved to the left side by the thickness of the heat insulating wall. In this way, the protrusion of the recess 46 into the storage is further reduced, the effective internal volume in the storage is increased, and the volumetric efficiency is further improved.

[0102] By placing the low temperature part down and the high temperature part up, the cooling cycle and the heat release cycle can be separated from each other without any waste. The cooling device other than the cooling device equipped with the Stirling refrigerator is also enjoyed. it can. For example, in the case of a cooling device using a Peltier element, The same effect S can be obtained by replacing the high-temperature head 111 and the high-temperature side condenser 122 with the high-temperature part of the Peltier element by substituting the low-temperature part 112 and the low-temperature evaporator 132 with the low-temperature part of the Peltier element. The above effect is not limited to the refrigerator, and can be said to be an effect obtained only by the positional relationship between the low temperature part and the high temperature part of the cooling device.

The same applies to a cooling device that uses a refrigerant such as HC refrigerant, and includes a compressor, a condenser, a refrigerant pipe, an expansion valve, a capillary tube, an evaporator, and the like. I can say that. If a heat generating part such as a compressor or a condenser is placed in the recess 46 and a part of a cylindrical tube or an evaporator is placed in the cabinet, the heat generating part is located on the upper rear surface of the heat insulating housing 10. This makes it easier for heat to escape upwards, reduces the effect of heat on the storage room, and provides a cooler with less energy loss.

[0104] The effect of providing the recess 46 serving as the machine room at the left or right corner of the rear upper part of the heat insulating housing 10 is not unique to the refrigerator equipped with the Stirling refrigerator. Even with a compressor-type cooling device using a refrigerant such as HC refrigerant, the protrusion of the concave portion into the chamber can be reduced, and a refrigerator with good volumetric efficiency can be obtained. If the condenser and the refrigerant pipe are provided on the ceiling of the heat insulating housing, the protrusion of the recess into the storage is further reduced, and the effective internal volume in the storage is increased.

[0105] Next, a second embodiment of the present invention will be described with reference to Figs. Constituent elements in the second embodiment that are functionally common to the constituent elements in the first embodiment are denoted by the same reference numerals as in the first embodiment.

The refrigerator 1 includes a heat insulating housing 10. Insulated housing 10 inserts a synthetic resin inner housing inside the sheet metal outer housing, and inserts a heat insulating material in the gap between the outer housing and the inner housing. A heat insulating layer is formed by foaming resin. The method of manufacturing such a heat-insulating housing is well known, and is not the gist of the present invention! /.

As shown in FIG. 15, the storage chamber inside the heat insulating housing 10 is divided into two vertically by a horizontal partition (first partition) 11. The space above and below the horizontal partition 11 is divided into left and right by a vertical partition (second partition) 12 and a vertical partition (third partition) 13. Horizontal partition (first partition) Below 11 and to the left of vertical partition 13 The space is further divided into two vertically by a horizontal partition (fourth partition) 14.

Yes

The space above the horizontal partition 11 and to the left of the vertical partition 12 is the first partition 15. A space above the horizontal partition 11 and to the right of the vertical partition 12 is a second partition 16. A space below the horizontal partition 14 and to the left of the vertical partition 13 is a third partition 17. The space below the horizontal partition 11 and to the right of the vertical partition 13 is the fourth partition 18. The first compartment 15 and the second compartment 16 are used as a refrigerator compartment. The third compartment 17 and the fourth compartment 18 are used as freezing rooms. Between the horizontal partitioning parts 11 and 14, the left space part of the vertical partitioning part 13 serves as a temperature switching partitioning part 19 that can be used as a refrigerator compartment or a freezer compartment.

[0109] A first heat insulation door 20 is provided at the front opening of the first partition 15 and a second heat insulation door 21 is provided at the front opening of the second partition 16, and the front of the third partition 17 A third heat insulating door 22 is provided at the opening, a fourth heat insulating door 23 is provided at the front opening of the fourth compartment 18, and a fifth heat insulating door 24 is provided at the front opening of the temperature switching compartment 19. Is provided. The first heat insulation door 20, the third heat insulation door 22, and the fifth heat insulation door 24 rotate around the hinge provided on the left side, while the second heat insulation door 21 and the fourth heat insulation door 23 face the right side. It rotates around the hinge part provided in the center. An operation unit 25 for setting the temperature of each part in the storage room is provided below the first heat insulating door 20.

[0110] The first partition section 15 is partitioned in the vertical direction by a three-stage shelf 30. A drawer-type case 31 is arranged under the lowest shelf 30.

[0111] The second partition section 16 is also partitioned in the vertical direction by the three-stage shelf 32. The lowermost shelf 32a has a depth dimension larger than the upper two tiers, and underneath the drawer cases 33 and 34 are arranged in two upper and lower tiers. A partition cover 35 (see FIG. 16) is provided for the upper surface opening of the lower case 34. The space between the lowermost shelf 32a and the partition cover 35 constitutes an isolation compartment 16a, and the space below the partition cover 35 constitutes an isolation compartment 16b. On the inner surface of the second heat insulating door 21, a rack 36 for storing bottles and beverage paper packs is attached.

[0112] The first partition 15 and the second partition 16 are each provided with illumination. 1st section The lighting for section 15 is a downlight 37 (see Fig. 17) placed on the ceiling, and the lighting for the second section 16 is a lighting panel 38 (see Figure 16) placed on the top of the back wall. ). Both the downlight 37 and the lighting panel 38 use LEDs as a light source.

[0113] The third compartment 17 has a total of two cases 40a and 40b, and the fourth compartment 18 has a total of three cases.

41a, 41b, and 41c are inserted so as to overlap each other. Cases 40a and 40b are supported on the inner surface of the third partition 17 by the edges on both sides, and cases 41a, 41b and 41c are supported on the inner surface of the fourth partition 18 by the edges on both sides. Can be pulled out by sliding to the side. A case 42 is inserted in the temperature switching section 19.

[0114] An ice making unit 43 is disposed on the ceiling of the fourth partition 18 (see FIGS. 16 and 18). Ice produced by the ice making unit 43 is received in the ice container 44 (see FIG. 15) in the case 41a. A water supply tank 45 for supplying water to the ice making unit 43 is installed on the right side of the case 34 in the isolation section 16b.

[0115] The third compartment 17 and the fourth compartment 18 are divided as necessary to install independent compartments specialized for ice making, and to suit various temperature settings required from quick freezing to thawing. It is possible to establish an independent division.

[0116] The storage chamber is cooled by a cooling device 100 shown in FIG. In the cooling device 100 of FIG. 21, the high-temperature side circulation circuit 120 takes out the heat extracted from the high-temperature head 111 to prevent dew condensation in the dew proof part (the part of the surface of the heat insulating housing 10 where condensation is to be avoided). The This is realized by the high-temperature side second circulation circuit 150.

The high temperature side second circulation circuit 150 is thermally connected to the gas-phase refrigerant pipe 123G of the high temperature side circulation circuit 120 via the heat exchanger 151. The tertiary refrigerant is sealed in the high-temperature side second circulation circuit 150 in a non-depressurized state. The tertiary refrigerant is a mixture of water and antifreeze. The tertiary refrigerant needs to have a low viscosity to ensure circulation, so the antifreeze mixing ratio is low.

[0118] FIGS. 22 and 25-29 show how the heat exchanger 151 is attached to the gas-phase refrigerant pipe 123G.

22 and 25-29 correspond to FIGS. 6 and 9-13 in the first embodiment.

[0119] The pipe 152 of the high-temperature side second circulation circuit 150 follows the path shown in Fig. 23 after exiting the heat exchanger 151. That is, the pipe 152 becomes the down pipe 152D and goes down to the bottom of the heat insulating casing 10, and enters the drain pan 153 installed there. Pipe 152 meanders through drain pan 153 and The temperature of the drain water collected in the renpan 153 is raised. Fan 154 is combined with drain pan 153 to further promote the evaporation of drain water.

[0120] The pipe 152 exiting the drain pan 153 is divided into two systems at the branch 155, and then both systems enter the lower part of the right side wall of the thermal enclosure 10, pass through the right side wall forward, Reach the lower front. The two routes are separated from each other, and one route rises up the leading edge of the right side wall of the heat insulating housing 10. Enter the front edge of the horizontal partition 11 on the way up, draw a hairpin shape, return to the front edge of the right side wall, and continue rising. The pipe 152 that reaches the upper end of the right side wall enters the ceiling wall, passes the front edge of the ceiling wall from right to left, reaches the left side wall, descends the front edge of the left side wall, and further lowers the lower side of the left side wall on the rear side. To the gathering part 156.

The other system enters the bottom wall from the front edge of the right side wall, passes through the front edge of the bottom wall from right to left, and reaches the lower end of the vertical partition 13. Pipe 152 then turns upward and passes through the front edges of vertical dividers 13 and 12 from bottom to top. The pipe 152 that reaches the upper end of the vertical partition 12 is folded and lowered. In the middle of descending, it enters the front edge of the horizontal partition 11, draws a hairpin shape, and then returns to the front edge of the vertical partition 13. The pipe 152 then enters the front edge of the horizontal partition 14 and draws a hairpin shape, and then returns to the front edge of the vertical partition 13 and continues to descend to the bottom wall. Piping 152 then enters the left side wall with a right force at the front edge of the bottom wall.

Yes

[0122] The pipes 152 unified at the gathering section 156 enter the piezoelectric circulation pump 157 installed at the bottom of the heat insulating casing 10. The pipe 152 exiting the circulation pump 157 returns to the heat exchanger 151 as an up pipe 152U.

[0123] The dew proof portion 160 (see Fig. 21) includes the right and left walls, the ceiling wall and the bottom wall, and the front edges of the horizontal partition and the vertical partition. The piping 152 passes near the surface of the heat insulating housing 10 in the dew-proofing section 160, and transmits the heat obtained from the high-temperature side circulation circuit 120 through the heat exchanger 151 to the location. As a result, the temperature of the dew proof part 160 is maintained higher than the dew point.

[0124] Next, the arrangement of the low temperature side evaporator 132 and the cold air passage will be described mainly with reference to FIG. The low-temperature side evaporator 132 is lower than the Stirling refrigerator 110 inside the heat insulating enclosure 10. Placed in the table. Furthermore, it is arranged at a level below the lower part of the vertical partition 12. Thereby, the natural circulation of the secondary refrigerant is performed more stably.

[0125] The low temperature side evaporator 132 is disposed in the cold air passage 50 (see FIG. 16) provided in front of the wall at the back of the fourth partition section 18. Another cold air passage 51 is provided in front of the cold air passage 50. In the lower part of the cool air passage 50, an air inlet 52 for sucking the return air that has finished the role of cooling the storage room is formed. The low temperature side evaporator 132 is installed in the cold air passage 50 above the intake port 52. Above the low-temperature side evaporator 132, a fan 53 for blowing air into the cool air passage 51 is provided.

[0126] Three cold air passages serving as branch lines extend from the cold air passage 51. The first one is a cold air passage 54 that sends cold air to the first compartment 15 and the second compartment 16. A discharge damper 55 and a fan 56 are provided in the cold air passage 54. The cool air passage 54 past the fan 56 enters the vertical cut portion 12 and rises as an up cool air passage 54U (see FIG. 16) inside the vertical partition portion 12.

[0127] The ascending cool air passage 54U reaching the upper part of the vertical partition 12 continues to the descending cool air passage 54D via a short horizontal connecting passage 54H. The descending cold air passage 54D descends to the lower side of the vertical partition 12 and the front side of the ascending cold air passage 54U. The ascending cold air passage 54U, the horizontal communication passage 54H, and the descending cold air passage 54D have an inverted U-shape.

[0128] Not only the vertical partition 12 but also the provision of the cold air passage in the partition does not require the cold air passage to be completely embedded in the partition. Only a part of the cold air passage may be embedded in the partition part, or may be provided so as to cover the outer surface of the partition part.

Yes

[0129] In the ascending cold air passage 54U, a plurality of cold air discharge ports 57 for discharging cold air to the second partition portion 16 are formed at intervals in the upward and downward directions. In the descending cold air passage 54D, a plurality of cold air discharge ports 58 for discharging cold air to the first partition portion 15 are formed at intervals in the vertical direction. The cold air outlets 5 7 and 58 are located in the vertical partition 12.

In FIG. 16, the plurality of cold air outlets 57 and the plurality of cold air outlets 58 are aligned with each other along a vertical line. Such arrangement is not necessarily required. Multiple cold air outlets 57 and multiple cold air outlets 58 can be shifted in the front-rear direction. It may be distributed. The ascending cold air passage 54U and the descending cold air passage 54D need only be capable of uniformly delivering cold air to the cold air discharge ports 57 and the cold air discharge ports 58 distributed in this manner.

[0131] With regard to the cold air discharge port 57, a plurality of cool air discharge ports 57 may be provided in each of the regions partitioned by the shelf 32 and the shelf 32a so as to be shifted in the front-rear direction. For the cool air outlet 57 provided at a location outside the territory of the ascending cool air passage 54U, a cool air passage projecting as a branch line from the ascending cool air passage 54U is prepared. By adopting such a configuration, the internal temperature distribution of the second partition part 16 can be made more uniform.

[0132] The same applies to the cold air discharge port 58, and a plurality of the regions can be provided for each region partitioned by the shelf 30, and the positions can be shifted in the front-rear direction. For the cool air discharge port 58 provided at a location outside the area of the descending cold air passage 54D, a cold air passage extending as a branch line from the descending cold air passage 54D is prepared. By adopting such a configuration, the internal temperature distribution of the first partition portion 15 can be made more uniform.

[0133] A plurality of cold air discharge ports 57 are provided in the front and rear direction of each region partitioned by the shelves 32 and 32a, and a plurality of cold air discharge ports 58 are positioned in the front and rear direction for each region partitioned by the shelf 30. When implementing a configuration in which the shelves are shifted, the vertical positions of the shelves 32 and 32a should be shifted so that the shelves 30 and 32a do not have the same height. If the cold air outlet 5 7 is placed at a height corresponding to the height of the shelves 32 and 32a, and the cold air outlet 58 is placed at a height corresponding to the height of the shelf 30, the above configuration can be easily achieved. realizable.

[0134] In the second embodiment, the force S that the horizontal connecting passage 54H connects the vertical cooling air passage 54D to the vertical cooling air passage 54D and the vertical cooling air passage 54D directly connects the cooling air passage 54U and the downstream cooling air passage 54D. It is possible to omit the horizontal communication passage 54H. For example, the upper cold air passage 54U and the lower cold air passage 54D are connected by bending or curving the upper end, or the upstream cold air passage 54U and the downstream cold air passage 54D are inclined to form an inverted V shape. This can be achieved by a method such as linking.

[0135] The total opening area of the plurality of cold air discharge ports 57 and the total opening area of the plurality of cold air discharge ports 58 may be distributed according to the volume ratio of the second partition portion 16 and the first partition portion 15. Further, a plurality of cold air discharge ports 57 are provided in the second partition part 16 and a plurality of cold air discharge ports are provided in the first partition part 15. 58 are arranged so that the indoor temperature is made uniform. It is desirable to determine the location of the cold air outlet through experiments.

The amount of cold air flowing through the upstream cold air passage 54U is the sum of the amount of cold air supplied from the cold air outlet 57 and the amount of cold air supplied from the cold air outlet 58. Therefore, the upstream cool air passage 54U needs a larger cross-sectional area than the downstream cool air passage 54D. It is desirable to determine the cross-sectional area ratio between the upstream cool air passage 54U and the downstream cold air passage 54D through experiments.

[0137] The first partition 15 and the second partition 16 of the storage room are on both sides of the vertical partition 12 which is a partition, and the release of cold heat is made to the first partition 15 and the second partition 16. Therefore, the refrigerator 1 with less energy loss can be obtained. Furthermore, although the heat generation part of the cooling device 100 exists in the recessed part 46, since the 1st division part 15 and the 2nd division part 16 are division parts with comparatively high temperature like a refrigerator compartment, the temperature of the recessed part 46 vicinity is shown. And the temperature difference between the storage chambers is reduced. If the heat insulation walls of the first compartment 15 and the second compartment 16 are the same as the thickness set as the heat insulation wall of the refrigerator compartment, the amount of heat entering from the outside can be reduced. This contributes to reducing energy loss.

[0138] The cold air passage 54 is connected to two transverse cold air passages. One is a transverse cold air passage 59 that branches before the cold air passage 54 enters the vertical partition 12, and crawls the wall behind the isolation compartment 16 a along the bottom surface of the bottom shelf 32. In the transverse cold air passage 59, a cold air discharge port 60 is formed at a position away from the vertical partition 12 by a predetermined distance. A plurality of cold air outlets 60 are formed in the isolation section 16a at intervals in the left-right direction. In the present embodiment, two cold air discharge ports 60 are provided. The cold air outlet 60 supplies cold air toward the inside of the case 33. It is preferable that the cold air discharge port 60 has a larger opening area as it is arranged on the downstream side of the horizontal cold air passage 59 so that the temperature is made uniform between the left side portion and the right side portion of the isolation section 16a.

[0139] The other transverse cold air passage is a transverse cold air passage 61 that branches off from the ascending cold air passage 54U. A cold air discharge port 62 is formed in the lateral cold air passage 61 at a position away from the vertical partition 12 by a predetermined distance. A plurality of the cold air discharge ports 62 are formed in the second partition part 16 at intervals in the left-right direction. In the present embodiment, two cold air discharge ports 62 are provided. The cold air outlet 62 is It is preferable to increase the opening area of the air passage 61 on the downstream side so that the temperature is made uniform between the left side portion and the right side portion of the second partition portion 16.

Of the three cold air passages that extend from the cold air passage 51 as a branch line, the second one is the cold air passage 63 that sends the cold air to the third section 17. The cool air passage 63 is provided with a discharge damper 64, and a cool air discharge port 65 is formed downstream thereof.

[0141] Of the three cold air passages extending from the cold air passage 51 as a branch line, the third one is a cold air passage 66 for sending cold air to the temperature switching section 19. The cold air passage 66 is provided with a discharge damper 67, a fan 68, a heater 69, and a cold air discharge port 70 from upstream to downstream.

[0142] The cold air passage 51 is also formed with a cold air discharge port (not shown) for directly discharging cold air to the fourth partition section 18 formed by only the cold air passages 54, 63, 66.

[0143] The cold air that has cooled each compartment returns to the air intake 50 of the cold air passage 50 through the return passage.

Returned to 2. A return passage 71 is provided for the second section 16. The return passage 71 has intakes at two locations. The first is an air inlet 72 opened in the isolation section 16a. The second is an air inlet 73 opened in the isolation section 16b.

[0144] With respect to the first partition part 15, an opening that penetrates the lower rear of the vertical partition part 12 and exits to the isolation partition part 16b is a return passage 74. The cold air in the first partition 15 also has the return passage 74 force entering the isolation partition 16b and sucked into the air inlet 73.

A return passage 75 is provided for the temperature switching section 19. The return passage 75 is provided with a return damper 76.

[0146] Force for providing a return passage connected to the intake port 52 for the third partition part 17 as well. This is not shown, and only the flow of cold air is shown by a dotted arrow in FIG. The cold air inside the fourth partition 18 is directly sucked into the intake port 52.

[0147] When the operation of the Stirling refrigerator 110 is continued, moisture in the air in the heat insulating casing 10 becomes frost and adheres to the low temperature side evaporator 132. Frost reduces the heat exchange efficiency of the low-temperature evaporator 132. To prevent this, a defrost heater 77 is placed below the low-temperature side evaporator 132.

. The defrosting heater 77 is energized at an appropriate timing to defrost the low temperature side evaporator 132. Moisture generated by melting of the frost is dripped as drain water from the funnel 78 at the bottom of the cold air passage 50 to the drain pan 153. Drain water is then generated by heat from pipe 152 and wind from fan 154. It can be evaporated.

The control unit 80 shown in FIG. 21 controls the overall control of the refrigerator 1. The control unit 80 is based on the temperature setting command or operation command made through the operation unit 25, and on the basis of a signal from a temperature sensor (not shown) arranged in each unit, and the Stirling refrigerator 110, the ice making unit 43, Fan 53, discharge damper 55, fan 56, discharge damper 64, discharge damper 67, fan 68, heater 69, return damper 76, defrost heater 77, fan 154, circulation pump 157, etc. Adjust the temperature, and make ice and defrost. Note that the electrical components constituting the control unit 80 are housed in an electrical box 81 (see FIGS. 16 and 17) installed on the ceiling of the heat insulating casing 10.

[0149] When the controller 80 starts the operation of the Stirling refrigerator 110, the high temperature head 111 generates heat. The secondary refrigerant in the high temperature side evaporator 121 is evaporated by the heat to become a gas, and the heat is held as latent heat. The gasified secondary refrigerant ascends the gas-phase pipe 123G and enters the high-temperature side condenser 122, where it condenses to sensible heat. The sensible heat is dissipated from the surface of the high-temperature side condenser 122 to the outside. The wind blown from the heat dissipation fan 124 helps to release heat. The secondary refrigerant that has condensed and turned down descends the liquid phase pipe 123L and returns to the high-temperature side evaporator 121.

[0150] Cold heat is generated in the low-temperature head 112. The gaseous secondary refrigerant inside the low-temperature side condenser 131 is condensed by the cold and becomes a liquid, and the cold is held as latent heat. The liquefied secondary refrigerant descends through the liquid phase pipe 133L and enters the low temperature side evaporator 132, where it evaporates due to the heat in the refrigerator 1. The cold heat becomes sensible heat by the evaporation of the secondary refrigerant. The secondary refrigerant that has evaporated to gas goes up the gas-phase pipe 133G and returns to the low-temperature side condenser 131.

[0151] When the fan 53 is operated in a state where the cold heat is sensible in the low temperature side evaporator 132, the air sucked from the inlet 52 at the lower end of the cold air passage 50 is cooled by the low temperature side evaporator 132, Become. The cold air is sent to the cold air passage 51 by the fan 53 and further sent to the cold air passages 54, 63 and 66. Further, it is blown out from the cold air discharge port (not shown) to the fourth partition section 18.

[0152] The cooling device 100 can realize a cold air temperature with an average discharge temperature of minus 42 to 43 ° C, and in some cases, a discharge temperature of around minus 50 ° C. Therefore, the cool air from fan 53 The fourth section 18 that blows out directly can reduce the room temperature to about minus 40 ° C. Even with a normal compressor cooling device, it is possible to achieve the cryogenic temperature as described above by using ammonia as the refrigerant. An ice making fan (not shown) in the ice making unit 43 blows the cryogenic air into the water to make ice, and the ice making proceeds quickly. Note that by adjusting the refrigeration capacity of the cooling device 100, a cold air temperature of about minus 18 ° C can be achieved.

[0153] The third section 17 can control the amount of cool air flowing in by adjusting the opening degree of the discharge damper 64 S. For this reason, irrespective of the 4th division part 18, the temperature of the 3rd division part 17 can be maintained at minus 18 degreeC which is a normal freezing temperature.

[0154] The temperature switching section 19 is used in a wide temperature range from the chilled temperature to minus 18 ° C, and its temperature adjustment controls the amount of cold air flowing in by the discharge damper 67 and the return damper 76, Further, it is performed by heating the cold air with a heater 69 as necessary.

[0155] Since the temperature switching section 19 is also used for thawing frozen food, there may be a large temperature difference from the fourth section 18. In order to prevent the high temperature in the temperature switching section 19 from affecting the fourth partition section 18, the heat insulating layer is particularly thick in the vertical partition section 13 between the temperature switching section 19 and the fourth section section 18. Has been. Further, the return passage 75 is independent from the fourth partition section 18 so that the air returning from the temperature switching section 19 to the intake port 52 is not mixed with the air in the fourth partition section 18.

Note that when the discharge damper 67 and the return damper 76 are closed and the fan 68 is operated, air circulates in the temperature switching section 19. When the heater 69 is energized in this state, the temperature of the temperature switching section 19 can be increased to 50-80 ° C, much higher than the chilled temperature! At such a high temperature, the growth of spoilage bacteria can be suppressed, so that foods and others can be stored hygienically in a warm state.

[0157] The force S that cool air is sent from the fan 56 to the first partition 15 and the second partition 16 through the cool air passage 54, and the cool air cools the first partition 15 and the second partition 16. The amount of cold air is adjusted by the discharge damper 55 so that it does not become too much. The cold air rises from the cold air passage 54, enters the cold air passage 54U, and blows out from the cold air discharge port 57 to the second partition section 16 while ascending there. The cold air discharge port 57 has a vertical space in the space above the isolation section 16a. Since the number is formed, the space is uniformly cooled.

[0158] A part of the cold air enters the transverse cold air passage 61 near the upper end of the ascending cold air passage 54U and blows out from the cold air outlet 62. Since the cold air discharge port 62 is provided at a predetermined distance from the vertical partition 12, the cold air discharged from the cold air discharge port 57 and the cold air discharged from the cold air discharge port 62 are above the isolation compartment 16a. The space is uniformly cooled. Since the two cold air outlets 62 are formed at intervals in the horizontal direction, the function of uniform cooling is further enhanced. If the opening area of the cold air outlet 62 on the downstream side of the lateral cold air passage 61, that is, on the right side is made larger than that on the left side, temperature uniformity in the left and right portions of the second partition 16 is further promoted. be able to.

[0159] The cold air that has reached the upper end of the upstream cool air passage 54U enters the downstream cold air passage 54D via the horizontal communication passage 54H. Then, while descending the descending cold air passage 54D, the air is blown out from the cold air discharge port 58 to the first partition portion 15. Since a plurality of the cold air discharge ports 58 are formed at intervals in the vertical direction, the first partition portion 15 is uniformly cooled.

[0160] The cold air indirectly releases the cold heat to the left and right compartments as it goes up the ascending cold air passage 54U. In other words, since the heat is received, the cold air entering the descending cold air passage 54D has a higher temperature than when it entered the upstream cold air passage 54U. For this reason, the temperature of the first partition 15 is higher than the temperature of the second partition 16.

[0161] As described above, the temperature of the first partition 15 is higher than that of the second partition 16, so that the first partition 15 is located between the first partition 15 and the recess 46 that is less susceptible to the influence of the heat generating part of the cooling device 100 than the second partition 16 is. The thickness of the heat insulating layer can be reduced as compared with the case where the recess 46 is adjacent to the second partition part 16.

[0162] As described above, by providing the cool air passage inside the vertical partition portion 12, the internal space of the vertical partition portion 12 that has not been considered so far can be effectively used, and the first partition portion 15 and the first partition portion 15 can be used. The depth of the two compartments 16 can be expanded. Further, in the vertical partition section 12, an ascending cool air passage 54U for raising the cool air cooled by the low temperature side evaporator 132 and a descending cool air passage 54D for lowering the cool air rising above are formed. The compartment 16 is supplied with cold air from the upstream cool air passage 54U, and the first compartment 15 is supplied with cold air from the downstream cold air passage 54D. Therefore, by utilizing the temperature rise of the cold air naturally generated during the flow process, The second compartment 16 and the first compartment 15 can have different temperatures. FIG. 20 shows a detailed structure of the vertical partition 12. The vertical partition 12 is constituted by a vertical partition front part 12A and a vertical partition rear part 12B. The vertical partition front part 12A has a structure in which the heat insulator 170 is sandwiched between the left shell 171L and the right shell 17 1R, and the vertical partition rear part 12B has the heat insulator 172 sandwiched between the left shell 1 73L and the right shell 173R. Structure. The heat insulators 170 and 172 are made by foaming a resin such as styrene or urethane. The left chenole 171L, the right chenole 171R, the left chenole 173L, and the right shell 173R are formed of a resin such as polypropylene or polystyrene. The left shell 171L and the right shell 171R, and the left chenole 173L and the right shell 173R are coupled to each other by claw engagement, screwing, adhesion, or the like.

[0164] The front surface of the vertical partition front portion 12A is covered with a cover 174. The cover 174 is made of a high-strength steel plate. Needless to say, this is a magnetic material, so that the magnet-mounted gaskets attached to the back surfaces of the first heat insulation door 20 and the second heat insulation door 21 are adsorbed exactly. Thereby, the sealing performance of the first heat insulating door 20 and the second heat insulating door 21 is improved. The cover 174 is coupled to the left shell 171L and the right shell 171R by claw engagement, screwing, adhesion, or the like.

[0165] In the vicinity of the back surface of the cover 174, a pipe 152 is arranged. The self-pipe 152 is disposed in a recess 175 formed in the heat insulator 170. The pipe 152 may be in direct contact with the cover 174, or a butyl rubber sheet may be attached to the back surface of the cover 174, and the cover 174 may be contacted via the butyl rubber sheet. The butyl rubber sheet also reinforces the mounting of the cover 174.

FIG. 34 shows a modification of the vertical partition 12. In this modification, the left shell 171L and the right shell 171R are not distinguished from each other in the vertical partition front portion 12A, and the heat insulator 170 is inserted from the front into the single-shell shell 171 with the front open. The forward-direction partition portion front portion 12A was formed. With this configuration, it is possible to obtain the vertical partition front portion 12A with further improved strength.

The method for forming the vertical partition 12 described so far is also applied to the formation of the horizontal partitions 11 and 14 and the vertical partition 13.

[0168] In the heat insulator 172, a concave portion 176 is formed on the side facing the left shell 173L, which is shaped like the up cold air passage 54U, the horizontal communication passage 54H, and the down cold air passage 54D. This recess 176 Is covered with the left shell 173L, so that an ascending cool air passage 54U, a horizontal communication passage 54H, and a descending cool air passage 54D are formed.

[0169] Only the left shell 173L separates the upstream cold air passage 54U from the outside. Therefore, the surface of the left shell 173L is cooled by the cold air passing through the ascending cold air passage 54U, and there is a possibility of condensation, but this portion is in close contact with the right partition 46a of the recess 46 as shown in FIG. Therefore, condensation is prevented. Note that if air enters between the left shell 173L and the right partition wall 46a, moisture in the air will condense, so a sealing material (for example, butyl rubber, silicone rubber, soft urethane foam, etc.) will prevent air from entering this area. ).

[0170] Condensation occurs on the surface of the left shell 173L when only the left shell 173L is separated from the outside of the horizontal connecting passage 54H that is separated from the right partition wall 46a and the cold air passage 54D. Therefore, for these portions, a heat insulator 177 is disposed on the back side of the left shell 173L so that the cold air passing through the horizontal communication passage 54H and the descending cold air passage 54D does not contact the left shell 173L.

[0171] As a result of disposing the heat insulator 177, the descending cold air passage 54D is slightly shifted to the right. Accordingly, the thickness of the insulation 172 between the right shell 173R and the thickness is reduced. The temperature of the cold air flowing through the descending cold air passage 54D is higher than that of the cold air flowing through the upstream cold air passage 54U, so there are few problems. .

[0172] The upstream cool air passage 54U is also provided with a heat insulator equivalent to the heat insulator 177 if necessary. For example, this may be the case when there is a part that is not aligned side by side with the right partition wall 46a.

[0173] Further, as in the second embodiment, when the volume of the first partition 15 is significantly smaller than the volume of the second partition 16, the amount of cold air supplied to the first partition 15 is the second. The amount of cool air supplied to the compartment 16 can be reduced. That is, the cross-sectional area of the descending cold air passage 54D can be made smaller than the cross-sectional area of the ascending cold air passage 54U. In order to make the cross-sectional area of the down cool air passage 54D smaller than the cross sectional area of the cool air passage 54U, if the cross-sectional area is reduced by compressing the width of the down cool air passage 54D in the left-right direction, the space between the right shell 173R and Can restore the thickness of insulation 172

[0174] The cold air flowing through the cold air passage 54 is partially cooled in the lateral direction before entering the ascending cold air passage 54U. Enter passage 59. The cold air that has entered the transverse cold air passage 59 is blown out into the case 33 from two cold air outlets 60 that are spaced apart in the horizontal direction, and the inside of the case 33 in the isolation section 16a is uniformly cooled. To do. By adjusting the amount of cold air blown out from the cold air passage 59, the temperature of the isolation section 16a is made lower than the space above it, and is isolated as a chilled room or an ice greenhouse, for example, the internal temperature is 0 ° C 3 ° C. A compartment 16a can be used. The adjustment of the amount of cold air can be achieved by setting the cross-sectional area of the horizontal cold air passage 59, setting the opening area of the cold air discharge port 60, or installing a damper in the horizontal cold air passage 59! /.

[0175] Around the case 34 in the isolation compartment 16b, particularly in the lower part thereof, return air from the first compartment 15 and return air from the second compartment 16 that have relatively high temperatures are present. Flowing. As the return air from the first section 15 and the return air from the second section 16 flow, the temperature drop of the isolation section 16a is small, for example, the internal temperature becomes a level of 5 ° C. Therefore, the isolation section 16b can be used as a vegetable storage space. Further, the partition cover 35 closes the upper surface opening of the case 34 tightly, thereby suppressing the evaporation of water in the food in the case 34. For this reason, the interior of case 34 is more suitable for vegetable storage.

[0176] It should be noted that if a part of the return air from the second partition part 16 is caused to flow in the gap between the upper surface of the partition cover 35 and the lower surface of the case 33, the return air is heated relatively. Even if the isolation section 16a is set in a chilled room or an ice greenhouse due to the effect of air heat insulation, the low temperature is transmitted to the isolation section 16b, which helps prevent the vegetables in the case 34 from freezing. . In order to enhance the heat insulating effect, a heat insulating layer may be formed on the partition cover 35 by attaching a heat insulating material or the like.

[0177] Unlike the above-described embodiment, it is also possible to adopt a configuration in which all of the cooling device is arranged at the lower part of the heat insulating casing, specifically, at a level below the lower part of the partition part. This is not particularly inconvenient in this configuration, because it is necessary to supply cold air to the upstream cold air passage.

[0178] The cold air discharge port formed in the transverse cold air passage 61 can have a different force S from the cold air discharge port 62 of FIG. The modification is shown in FIG.

[0179] In the modification of FIG. 3031, the horizontal cold air passage 61 is provided with a slit-like cold air discharge port 62A that is long in the horizontal direction. The cold air discharge port 62A is located on the back wall of the second partition 16 and the ceiling. Open in the corner with the well. Since the cold air is discharged from the wide cold air discharge port 62A in this way, the space above the isolation section 16a is uniformly cooled.

[0180] The configuration of the vertical partition 12 can be changed from FIG. The modification is shown in FIGS. 32 and 33. FIG.

[0181] In the modification of Fig. 32, the descending cold air passage 54D is moved to the front side. In this way, the heat insulation layer between the front surface of the vertical partition 12 and the descending cool air passage 54D becomes thin, but the temperature of the cool air flowing through the descending cool air passage 54D is relatively high, so even if the insulation layer becomes thin, the vertical partition The front surface of part 12 is unlikely to be overcooled. By moving the down cool air passage 54D in this way, the distance between the up cool air passage 54U and the down cool air passage 54D is widened. Decrease with S.

[0182] As shown in FIG. 32, it is possible to reduce the thickness of the vertical partition 12 between the upstream cool air passage 54U and the downstream cold air passage 54D to form a recess 178, thereby increasing the volume of the storage chamber. is there . The concave portion 178 serves as a communication path between the upper and lower spaces of the shelf 32, and causes cold air circulation in the second partition portion 16, thereby helping to equalize the temperature of the second partition portion 16.

In the modification shown in FIG. 33, the concave portion 178 is entirely used as a communication path in the upper and lower spaces of the shelf 32, so that a portion having the same height as the shelf 32 is closed with a horizontal rib 179, and the rib 179 is cooled with air. A thread 179A was formed. By adjusting the area of the slit 179A, it is possible to adjust the amount of cool air circulation S. The rib 179 may be formed on the vertical partition 12 or on the shelf 32.

The lowermost shelf 32a that separates the second partition part 16 and the isolation partition part 16a and the partition cover 35 that separates the isolation partition part 16a and the separation partition part 16b close the recess 178. This prevents cold air from mixing between the second compartment 16 and the isolation compartment 16a, and also prevents cold air from mixing between the isolation compartment 16a and the isolation compartment 16b. Make sure that the specified temperature difference set in is not lost. Closing the recess 178 can be realized by providing a rib there or by inserting a heat insulating material. There should be no recess 178 for the isolation compartments 16a, 16b!

[0185] The effect of the cool air passage provided in the partition not related to the heat generation of the cooling device is The cooling device is not limited to the case where the cooling device is disposed on the back upper portion of the heat insulating casing. The same effect can be obtained even when the cooling device is arranged at other positions.

[0186] While the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and various modifications can be made without departing from the spirit of the invention.

Industrial applicability

[0187] The present invention can be widely used in a refrigerator for home use or business use. In addition, it can be widely used in cooling devices that are installed in such refrigerators and that include a Stirling refrigerator as a component.

Claims

The scope of the claims

[1] A cooler characterized in that a part of the cooling device is arranged in a machine room formed on the left or right side of the upper part of the rear surface of the heat insulating housing.

[2] The heat insulating housing includes a storage chamber for storing an object to be cooled, and cold air cooled by a cooling unit of a cooling device is supplied to the storage chamber through a cold air passage. The refrigerator according to claim 1, wherein at least a part of the cold air passage is provided in a partition portion that partitions the chamber into a predetermined state.

[3] The partition section that partitions the storage chamber into a predetermined state includes a vertical partition section that partitions the storage chamber into a first partition and a second partition, and at least a part of the cold air passage is provided in the vertical partition section. The refrigerator according to claim 2, wherein the refrigerator is formed.

[4] At least a part of the cooling unit of the cooling device is arranged at a level below the lower part of the partition part, and an upward cool air passage for raising the cool air cooled by the cooling part and an upper force S are provided in the partition part. A cold air passage for lowering the cold air is formed, one side partitioned by the partition portion is supplied with cold air from the upstream cold air passage, and the other side is supplied with cold air from the downstream cold air passage. The refrigerator according to claim 3.

[5] The cool air discharge port located in the upper part of the storage chamber and the cool air discharge port located in the middle in the vertical direction of the partition are provided for the cold air passage. Refrigerator.

[6] The refrigerator according to claim 5, wherein at least some of the cold air discharge ports have a shape of a slit that is long in a horizontal direction.

7. The refrigerator according to claim 2, wherein at least a part of the heat generating part of the cooling device is disposed in the machine room.

8. The refrigerator according to claim 7, wherein the machine room is arranged above the outside of the compartment to which cold air is supplied from the down cold air passage.

[9] A horizontal partition that divides the heat-insulating housing into upper and lower parts is provided, the cooling device includes a Stirling refrigerator as a component, a high-temperature side condenser is provided above the Stirling refrigerator, and the Stirling 3. The refrigerator according to claim 2, wherein the cooling unit that cools the air with cold heat of a refrigerator is positioned below the horizontal partition.

[10] A cooling device mounted in the refrigerator according to claim 1,

A Stirling refrigerator having a high-temperature head and a low-temperature head is included as a component, and a high-temperature circulation circuit for extracting heat is connected to the high-temperature head with respect to the Stirling refrigerator, The low temperature side circulation circuit is connected, and the attitude of the Stirling refrigerator is set so that the high temperature head is up and the low temperature head is down.

[11] The secondary refrigerant pipe of the high temperature side circulation circuit extends upward after being led out from the high temperature side evaporator thermally connected to the high temperature head, and the secondary refrigerant pipe of the low temperature side circulation circuit is the low temperature mentioned above 11. The cooling device according to claim 10, wherein the cooling device extends downward after being led out from a low-temperature side condenser thermally connected to the head.

[12] The high temperature side circulation circuit connects a high temperature side evaporator thermally connected to the high temperature head and a high temperature side condenser for heat dissipation with a secondary refrigerant pipe, and naturally circulates the secondary refrigerant. 11. The cooling device according to claim 10, wherein a power section of the Stirling refrigerator is disposed between the high temperature side evaporator and the high temperature side condenser.

[13] The high-temperature side condenser and the heat-dissipating fan that forcibly cools the high-temperature side condenser are supported in the space with the mounting legs of the Stirling refrigerator or the Stirling refrigerator itself as a support. Cooling system.

[14] The high-temperature side condenser and the heat-dissipating fan that forcibly cools the condenser are held in space with the mounting legs of the Stirling refrigerator as a support, and vibration is absorbed between the mounting legs and the supporting members that support the mounting legs. 12. The cooling device according to claim 11, wherein means are interposed.

[15] The force of any one of claims 10 to 14; wherein the Stirling refrigerator of the cooling device according to claim 1 is disposed in a recessed portion at the upper back of the heat-insulating housing, A cooler characterized in that a heat exchanger for cooling is arranged below the Stirling refrigerator.