JP6830006B2 - Refrigeration equipment and insulation filling method - Google Patents

Description

The present disclosure relates to a refrigerating apparatus having a refrigerant tank and a method for filling a heat insulating material.

A dual refrigerating device using a cascade capacitor is widely used as a refrigerating device capable of efficiently creating an ultra-low temperature environment such as -80 ° C. The dual refrigeration system has a high temperature side refrigeration circuit and a low temperature side refrigeration circuit, and a refrigerant that temporarily stores the refrigerant on the low pressure side of each refrigeration circuit in order to suppress a pressure rise in the circuit at startup. A tank may be provided. The internal volume of this refrigerant tank needs to be increased to some extent in order to ensure startability according to the amount of refrigerant in the circuit, but when the internal volume of the refrigerant tank is increased, the installation space becomes a problem.

In Patent Document 1, the refrigerant tank is formed of a tubular body, the cross-sectional area is reduced and the extending length is increased to secure the required internal volume, and the tubular body is appropriately bent to form an arbitrary shape. Disclosed is a cooling device that can be formed of the above-mentioned material and arranged in a narrow gap or the like to compactly install the refrigerant tank.

Japanese Unexamined Patent Publication No. 2010-78307

In the cooling device disclosed in Patent Document 1, a machine room in which a storage chamber is placed on a top plate of a box body defined internally, and a part of the cooling device and a control electrical box for controlling the cooling device are arranged. A tubular refrigerant tank is stored inside the base plate, which is provided at the bottom of the machine room and serves as a common substrate for equipment arranged in the machine room, or in the machine room / storage room. Therefore, it is necessary to process the tubular body constituting the refrigerant tank into a complicated shape according to the shapes of the storage room, the machine room, and the base plate, which requires a large processing cost.

An object of the present disclosure is to provide a refrigerating apparatus and a heat insulating material filling method capable of suitably installing a refrigerant tank while ensuring the heat insulating property of the refrigerant tank.

The refrigerating apparatus of the present disclosure includes a refrigerant tank that temporarily stores refrigerant to alleviate an increase in the internal pressure of the refrigerant circuit, an inner housing that includes a freezing storage chamber cooled by the refrigerant circuit, and the inner housing. The refrigerant tank has a heat insulating material that covers the heat insulating material, and is arranged at both corners on the back side of the heat insulating material and at a distance of a predetermined distance or more from the outer wall surface of the inner housing.

The heat insulating material filling method of the present disclosure is a heat insulating material filling method in which a heat insulating material is filled around an inner housing including a freezing storage chamber cooled by a refrigerant circuit, and the refrigerant is temporarily stored and the refrigerant is charged. A second heat insulating material is provided in advance around the refrigerant tank that alleviates the increase in the internal pressure of the circuit, and the refrigerant tank is provided on both the back side between the inner housing and the outer housing that includes the inner housing. After arranging in the corner portion , the heat insulating material is filled between the inner housing and the outer housing.

According to the present disclosure, the refrigerant tank can be suitably installed while ensuring the heat insulating property of the refrigerant tank.

The figure which illustrated the internal structure of the refrigerating apparatus which concerns on embodiment of this disclosure. Perspective view showing an example of the appearance of the refrigerating device AA sectional view of FIG. BB sectional view of FIG. FIG. 2 is a cross-sectional view taken along the line BB of FIG. 2, showing a state in which the refrigerant tank is arranged between the outer box and the inner box. FIG. 2 is a cross-sectional view taken along the line BB of FIG. 2, showing a state in which the refrigerant tank in the second example is arranged between the outer box and the inner box.

Hereinafter, the refrigerating apparatus according to the embodiment of the present disclosure will be described in detail with reference to the drawings. However, more detailed explanations than necessary, such as detailed explanations of already well-known matters and duplicate explanations for substantially the same configuration, may be omitted.

The following description and referenced drawings are provided for those skilled in the art to understand the present disclosure and are not intended to limit the scope of the claims of the present disclosure.

<Internal configuration of refrigeration equipment>
FIG. 1 is a diagram illustrating the internal configuration of 100 of the refrigerating device according to the embodiment of the present disclosure. As shown in FIG. 1, the refrigerating apparatus 100 has a high temperature side refrigerant circuit H and a low temperature side refrigerant circuit L. The high temperature side refrigerant circuit H is configured by connecting the compressor 201, the condenser 202, the pressure reducing valve 203, and the evaporator 204 in series. Further, the low temperature side refrigerant circuit L is configured by connecting the compressor 301, the condenser 302, the pressure reducing valve 303, and the evaporator 304 in series.

As shown in FIG. 1, the evaporator 204 of the high temperature side refrigerant circuit H and the condenser 302 of the low temperature side refrigerant circuit L are installed side by side, and vaporization of the refrigerant of the high temperature side refrigerant circuit H evaporated by the evaporator 204. The refrigerant in the low temperature side refrigerant circuit L can be cooled and condensed in the condenser 302 by heat. In the low temperature side refrigerant circuit L, by evaporating the refrigerant cooled by the condenser 302 by the evaporator 304, cold heat lower than the cold heat obtained by the evaporator 204 of the high temperature side refrigerant circuit H is transferred to the evaporator of the low temperature side refrigerant circuit L. It can be obtained at 304.

Further, as shown in FIG. 1, the high temperature side refrigerant circuit H and the low temperature side refrigerant circuit L are placed on the low pressure side, that is, on the refrigerant suction side of the compressors 201 and 301, respectively, via the capillary tubes 205 and 305 which are decompression means. Refrigerant tanks 206 and 306 are connected. The refrigerant tanks 206 and 306 temporarily store the refrigerant in the high temperature side refrigerant circuit H and the low temperature side refrigerant circuit L to alleviate the increase in internal pressure in the circuit.

<Appearance of refrigeration equipment>
FIG. 2 is a perspective view showing an example of the appearance of the refrigerating apparatus 100. As shown in FIG. 2, the refrigerating device 100 has an outer box 101, a door 102, and a base 103. The outer box 101 is the outermost housing of the refrigerating apparatus 100, and is a box body that houses the inner box 104 and the heat insulating material 105, which will be described later. The outer box 101 is an example of the outer housing of the present disclosure. The front surface of the outer box 101 is open, and the opening is closed by closing the door 102 connected to one surface of the outer box 101 so as to be opened and closed by a hinge, for example. The base 103 is a base that supports the outer box 101 and the inner box 104, and for example, a part of the configuration of the high temperature side refrigerant circuit H and the low temperature side refrigerant circuit L described above is housed inside.

FIG. 3 is a cross-sectional view taken along the line AA of FIG. Further, FIG. 4 is a cross-sectional view taken along the line BB of FIG. As shown in FIGS. 3 and 4, the inner box 104 and the heat insulating material 105 are housed inside the outer box 101.

The inner box 104 is a box containing a freezing storage chamber that is cooled to an ultra-low temperature of, for example, −80 ° C. by the cold heat obtained by the evaporator 304 of the low temperature side refrigerant circuit L. The inner box 104 is an example of the inner housing of the present disclosure. Similar to the outer box 101, the front surface of the inner box 104 is also opened, and the opening is closed by closing the door 102.

A heat insulating material 105 having a thickness equal to or larger than a preset thickness is provided between the outer wall surface of the inner box 104 and the inner wall surface of the outer box 101. More specifically, the heat insulating material 105 is provided between the upper surface, the lower surface, the left and right side surfaces, and the back surface of the inner box 104 and the upper surface, the lower surface, the left and right side surfaces, and the back surface of the outer box 101. The thicknesses of the heat insulating materials provided on the upper surface, the lower surface, the left and right side surfaces, and the back surface of the inner box 104 and the outer box 101 may be different from each other. The thickness of the heat insulating material 105 is determined in advance by the temperature in the freezing storage chamber required for the freezing device 100 and the like.

Further, at least a part of the door 102 is also made of a heat insulating material. Examples of the heat insulating material used for the heat insulating material 105 and the door 102 include urethane foam (polyurethane), polystyrene, polyethylene, glass wool and the like. The heat insulating material 105 is provided so as to be in contact with the inner wall surface of the outer box 101 and the outer wall surface of the inner box 104. The heat insulating material 105 and the door 102 keep the freezing storage chamber in the inner box 104 at a low temperature.

<Arrangement of refrigerant tanks>
The above-mentioned refrigerant tanks 206 and 306 are required to have an internal volume of a predetermined value or more due to the property of temporarily storing the refrigerant to alleviate the increase in the internal pressure in the circuit. In the refrigerating apparatus 100 according to the embodiment of the present disclosure, the installation space of the refrigerant tanks 206 and 306 is secured by the following method.

<First example>
In the first example, the refrigerant tanks 206 and 306 are arranged between the inner wall surface of the outer box 101 and the outer wall surface of the inner box 104, that is, inside the heat insulating material 105. FIG. 5 shows how the refrigerant tanks 206 and 306 are arranged between the outer box 101 and the inner box 104. FIG. 5 is a cross-sectional view taken along the line BB of FIG. 2, showing how the refrigerant tanks 206 and 306 are arranged between the outer box 101 and the inner box 104. In FIG. 5, the refrigerant tank 206 is on the left side and the refrigerant tank 306 is on the right side, but the opposite may be true.

In FIG. 5, the refrigerant tanks 206 and 306 are assumed to be cylindrical tubular members. It is assumed that the refrigerant tanks 206 and 306 shown in FIG. 5 are arranged along a direction perpendicular to the installation surface (for example, the floor surface) of the refrigerating apparatus 100. The thickness of the refrigerant tanks 206 and 306 is not particularly limited in the present disclosure, but the required internal volume of the refrigerant tanks 206 and 306 and the refrigerant tank 206 between the inner wall surface of the outer box 101 and the outer wall surface of the inner box 104 , 306 may be determined by the possible length.

In order to maintain the low temperature of the freezing storage chamber in the inner box 104, it is not desirable that the refrigerant tanks 206 and 306 are close to the outer wall surface of the inner box 104. Therefore, the refrigerant tanks 206 and 306 are provided at positions separated from the outer wall surface of the inner box 104 by a predetermined distance or more. It is in the vicinity of the four corners of the outer box 101 that the distance from the outer wall surface of the inner box 104 can be the longest inside the outer box 101. Since there is an opening on the front side, in the example shown in FIG. 5, the refrigerant tanks 206 and 306 are arranged at both corners on the back side between the outer box 101 and the inner box 104.

With such an arrangement, while ensuring a sufficient internal volume of the refrigerant tanks 206 and 306, and without increasing the size of the entire refrigerating apparatus 100 by the refrigerant tanks 206 and 306, further ensuring sufficient heat insulating properties. , Refrigerant tanks 206 and 306 can be arranged. Further, since the refrigerant tanks 206 and 306 are included in the outer box 101, the refrigerant tanks 206 and 306 are protected by the outer box 101. That is, it is possible to prevent a situation in which the refrigerant leaks out when, for example, an object other than the refrigerating apparatus 100 hits the refrigerant tanks 206 and 306 exposed to the outside and is damaged.

<Method of arranging the refrigerant tank in the first example>
In the following, when urethane foam is used as the heat insulating material 105, a method of arranging the refrigerant tanks 206 and 306 at the positions shown in FIG. 5 will be described.

First, the inner box 104 and the refrigerant tanks 206 and 306 are positioned with respect to the outer box 101 in a state where the heat insulating material 105 is not provided. Since the thickness of the heat insulating material 105 is predetermined, the inner box 104 is fixed so that the outer wall surface of the inner box 104 is separated from the inner wall surface of the outer box 101 by the thickness of the heat insulating material 105 in advance. To fix. Then, the refrigerant tanks 206 and 306 are arranged and fixed at both corners on the back side of the outer box 101, which are located as far as possible from the outer wall surface of the inner box 104.

In this state, foamed urethane is injected between the outer box 101 and the inner box 104 and solidified, so that the refrigerant tank 206, is inside the heat insulating material 105 arranged between the outer box 101 and the inner box 104. 306 can be placed.

<Second example>
In the second example, the refrigerant tanks 206 and 306 are arranged between the inner wall surface of the outer box 101 and the outer wall surface of the inner box 104 as in the first example, but around the refrigerant tanks 206 and 306. It differs from the first example in that a heat insulating material 106 having a predetermined thickness is provided in advance in the first example. The heat insulating material 106 is an example of the second heat insulating material of the present disclosure. FIG. 6 is a cross-sectional view taken along the line BB of FIG. 2, which shows a state in which the refrigerant tanks 206 and 306 in the second example are arranged between the outer box 101 and the inner box 104. In FIG. 6, as in FIG. 5, the refrigerant tank 206 is on the left side of the figure and the refrigerant tank 306 is on the right side, but the opposite may be true.

Also in the example shown in FIG. 6, the refrigerant tanks 206 and 306 are composed of cylindrical tubular members. The heat insulating material 106 is formed by wrapping a heat insulating material having a predetermined thickness around the tubular member, or spraying a foam material on the tubular member. The heat insulating material used as the heat insulating material 106 is urethane foam (polyurethane), polystyrene, polyethylene, glass wool or the like, like the heat insulating material 105.

As shown in FIG. 6, the refrigerant tanks 206 and 306 provided with the heat insulating material 106 having a predetermined thickness around them are located at both corners on the back side between the outer box 101 and the inner box 104. Be placed. The reason why the refrigerant tanks 206 and 306 are arranged at this position is that the refrigerant tanks 206 and 306 are arranged at positions as far as possible from the outer wall surface of the inner box 104, as in the example shown in FIG.

With such an arrangement, sufficient internal volume of the refrigerant tanks 206 and 306 is secured, and the size of the entire refrigerating apparatus 100 is not increased by the refrigerant tanks 206 and 306, and the inner box 104 has sufficient heat insulation. The refrigerant tanks 206 and 306 can be arranged while ensuring the above. Further, since the refrigerant tanks 206 and 306 are included in the outer box 101, the refrigerant tanks 206 and 306 are protected by the outer box 101. That is, it is possible to prevent a situation in which the refrigerant leaks out when, for example, an object other than the refrigerating apparatus 100 hits the refrigerant tanks 206 and 306 exposed to the outside and is damaged.

Further, in the example shown in FIG. 6, a heat insulating material 106 having a predetermined thickness is provided around the refrigerant tanks 206 and 306. For example, in the example shown in FIG. 5, the inner wall surface of the outer box 101 may come into contact with the outer wall surfaces of the refrigerant tanks 206 and 306, but in the example shown in FIG. 6, the heat insulating material 106 causes the inner wall surface of the outer box 101 to come into contact with each other. Since the outer wall surfaces of the refrigerant tanks 206 and 306 do not come into direct contact with each other, the heat insulating properties of the refrigerant tanks 206 and 306 can be further improved.

<Method of arranging the refrigerant tank in the second example>
In the following, when urethane foam is used as the heat insulating material 105, a method of arranging the refrigerant tanks 206 and 306 at the positions shown in FIG. 6 will be described.

First, by some method, a heat insulating material 106 having a thickness equal to or greater than a predetermined value is provided around the refrigerant tanks 206 and 306, which are cylindrical tubular members. As a method of providing the heat insulating material 106, for example, the heat insulating material 106 formed in a sheet shape in advance may be wound around the refrigerant tanks 206 and 306, or the refrigerant tanks 206 and 306 may be thickened by, for example, spraying. A heat insulating material such as urethane foam may be sprayed so that the thickness becomes equal to or larger than a predetermined thickness.

Next, the inner box 104 is positioned in the same manner as in the first example. Then, the refrigerant tanks 206 and 306 provided with the heat insulating material 106 around them are arranged and fixed at both corners on the back side of the outer box 101 at positions as far as possible from the outer wall surface of the inner box 104. At this time, for example, the heat insulating material 106 should be formed so that the cross-sectional shape of the refrigerant tanks 206 and 306 provided around the heat insulating material 106 is a quadrangle or the like so that the area in contact with the inner wall surface of the outer box 101 is large. For example, it is not necessary to particularly fix the refrigerant tanks 206 and 306 provided with the heat insulating material 106 around them, and the positioning can be performed only by placing them at both corners on the back side of the outer box 101. This improves workability when the refrigerant tanks 206 and 306 are arranged.

In this state, the refrigerant tanks 206 and 306 can be arranged at the positions illustrated in FIG. 6 by injecting foamed urethane between the outer box 101 and the inner box 104 and solidifying the urethane. At this time, for example, even if the injected urethane is not properly filled between the outer box 101 and the inner box 104, the heat insulating material 106 is already arranged at least around the refrigerant tanks 206 and 306. , The refrigerant tanks 206 and 306 can be reliably insulated.

<Action / effect>
As described above, the refrigerating apparatus 100 according to the embodiment of the present disclosure is a refrigerating apparatus having refrigerant tanks 206 and 306 that temporarily store the refrigerant and alleviate the increase in the internal pressure of the refrigerant circuit. Is arranged inside the heat insulating material 105 that covers the inner box 104 that includes the freezing storage chamber cooled by the refrigerant circuit, and at a position separated from the surface of the inner box 104 by a predetermined distance or more. Further, the refrigerating apparatus 100 according to the embodiment of the present disclosure further includes an inner box 104 and an outer box 101 containing a heat insulating material 105, and the heat insulating material 105 is filled between the inner box 104 and the outer box 101. Has been done.

With such a configuration, while ensuring a sufficient internal volume of the refrigerant tanks 206 and 306, and without increasing the size of the entire refrigerating device 100 by the refrigerant tanks 206 and 306, the inner box 104 has sufficient heat insulation. The refrigerant tanks 206 and 306 can be arranged while ensuring the above. Further, since the refrigerant tanks 206 and 306 are included in the outer box 101, the refrigerant tanks 206 and 306 are protected by the outer box 101. That is, it is possible to prevent a situation in which the refrigerant leaks out when, for example, an object other than the refrigerating apparatus 100 hits the refrigerant tanks 206 and 306 exposed to the outside and is damaged.

Further, in the refrigerating apparatus 100 according to the embodiment of the present disclosure, the heat insulating material 105 is such that the refrigerant tanks 206 and 306 in which the heat insulating material 106 having a predetermined thickness or more is provided in advance are the inner box 104 and the outer box 101. After being arranged between them, they are filled and arranged between the inner box 104 and the outer box 101. As a result, the inner wall surface of the outer box 101 and the outer wall surface of the refrigerant tanks 206 and 306 do not come into direct contact with each other, so that the heat insulating properties of the refrigerant tanks 206 and 306 can be further improved. Further, for example, even if the injected urethane is not properly filled between the outer box 101 and the inner box 104, the heat insulating material 106 is already arranged at least around the refrigerant tanks 206 and 306. The refrigerant tanks 206 and 306 can be reliably insulated.

Further, for example, the heat insulating material 106 is formed so that the cross-sectional shape of the refrigerant tanks 206 and 306 provided around the heat insulating material 106 is a quadrangle or the like so that the area in contact with the inner wall surface of the outer box 101 is large. Therefore, it is not necessary to particularly fix the refrigerant tanks 206 and 306 provided with the heat insulating material 106 around them, and the positioning can be performed only by placing them at both corners on the back side of the outer box 101. This improves workability when the refrigerant tanks 206 and 306 are arranged.

<Modification example>
Although various embodiments have been described above with reference to the drawings, the present disclosure is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present disclosure. Understood. In addition, each component in the above embodiment may be arbitrarily combined as long as the purpose of the disclosure is not deviated.

In the above-described embodiment, the refrigerant tanks 206 and 306 are arranged at both corners on the back side between the outer box 101 and the inner box 104, but in the present disclosure, the refrigerant tanks 206 and 306 are arranged. The position of is not limited to both corners. The refrigerant tanks 206 and 306 may be arranged anywhere as long as they are inside the heat insulating material 105 between the outer box 101 and the inner box 104 and are separated from the outer wall surface of the inner box 104 by a predetermined distance or more. ..

Further, in the above-described embodiment, the refrigerant tanks 206 and 306 are arranged along the direction perpendicular to the installation surface of the refrigerating apparatus 100, but in the present disclosure, the arrangement directions of the refrigerant tanks 206 and 306 are It is not limited to the direction perpendicular to the installation surface. The refrigerant tanks 206 and 306 are inside the heat insulating material 105 between the outer box 101 and the inner box 104, and are located at a position separated from the outer wall surface of the inner box 104 by a predetermined distance or more, for example, with respect to the installation surface. It may be arranged diagonally or right beside it.

Further, in the above-described embodiment, the refrigerant tanks 206 and 306 are cylindrical tubular members, but in the present disclosure, the shapes of the refrigerant tanks 206 and 306 are not limited to the cylindrical tubular members. The refrigerant tanks 206 and 306 may be tubular members other than the cylindrical shape, for example. Further, the refrigerant tanks 206 and 306 are tubular members having a circular cross section, and may have a shape bent in the long direction.

The present disclosure is useful for a refrigerating apparatus having a refrigerant tank for alleviating an increase in internal pressure of a refrigerant circuit.

100 Refrigerant 101 Outer box 102 Door 103 Base 104 Inner box 105 Insulation material 106 Insulation material 201,301 Compressor 202,302 Condenser 203,303 Pressure reducing valve 204,304 Evaporator 205,305 Capillary tube 206,306 Refrigerant tank H High temperature side refrigerant circuit L Low temperature side refrigerant circuit

Claims (4)

A refrigerant tank that temporarily stores the refrigerant to alleviate the rise in internal pressure of the refrigerant circuit,
An inner housing containing a freezing storage chamber cooled by the refrigerant circuit,
The heat insulating material that covers the inner housing and
Have,
The refrigerant tanks are arranged inside the heat insulating material and at both corners on the back side separated from the outer wall surface of the inner housing by a predetermined distance or more.
Refrigeration equipment. Further having the inner housing and the outer housing containing the heat insulating material,
The heat insulating material is arranged between the inner housing and the outer housing.
The refrigerating apparatus according to claim 1. Further having a second heat insulating material having a predetermined thickness or more provided around the refrigerant tank.
The refrigerating apparatus according to claim 1 or 2. A heat insulating material filling method in which a heat insulating material is filled around an inner housing containing a freezing storage chamber cooled by a refrigerant circuit.
A second heat insulating material is provided in advance around the refrigerant tank that temporarily stores the refrigerant and alleviates the increase in the internal pressure of the refrigerant circuit.
After arranging the refrigerant tanks at both corners on the back side between the inner housing and the outer housing including the inner housing,
The heat insulating material is filled between the inner housing and the outer housing.
Insulation filling method.

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