JP2000220978A - Cooling storage heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling storage heat exchanger wherein unevenness in the temperature distribution of a cooling storage material in a cooling storage operation and a cooling operation can be limited. SOLUTION: One or more pipe members 25 are mounted to a wave-shaped fin 24 in the advancing direction thereof so that each pipe 25 passes through two or more portions of the fin 24, and a cooling storage material 14 stored in a container is set so as to contact two or more waves of the fin to constitute a cooling storage type heat exchanger 23. Thus, thermal energy is efficiently transferred to the cooling storage materials, and hence nighttime power can be effectively utilized. Heat release from cooling storage materials can be stabilized so that the temperature control in a space to be cooled can be easily performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a regenerative heat exchanger.

[0002]

2. Description of the Related Art In recent years, in order to suppress power demand peaks,
There is a power rate system in which daytime and nighttime power rates differ. Therefore, various regenerative cooling systems have been proposed in which inexpensive power at night is used to cool a space to be cooled during the day, such as a freezer or a refrigerator.

A regenerative cooling system generally has a refrigerating cycle including a compressor and a condenser, and a regenerative heat exchanger. The regenerative heat exchanger has a regenerative material and a cooling pipe for exchanging heat with the regenerative material. In the regenerative cooling system, in addition to the normal operation of cooling the space to be cooled using only the refrigeration cycle without exchanging heat with the regenerator material, a regenerative operation and a cooling operation are also performed. In the cool storage operation, a low-temperature heat medium is sent to a cooling pipe constituting the cool storage heat exchanger to cool the cool storage material by using cheap electric power at night, and the cool storage material stores cold heat. In the cooling operation, in the daytime when the power rate is relatively high, the cooled space is cooled by utilizing the cold energy stored in the cooling operation.

In a regenerative heat exchanger, a number of fins may be provided on the outer surface of the cooling pipe in order to improve the heat exchange efficiency between the regenerative material and the heat medium flowing in the cooling pipe.
For example, JP-A-9-280714 discloses a regenerative heat exchanger in which a plurality of independent fins are attached to a pipe member. In general, in a regenerative heat exchanger, in order to effectively use a certain space provided for installing the heat exchanger, the cooling pipe is usually arranged in a meandering pipe in the space, and the regenerator material is It is installed between fins. Further, in many cases, the cooling pipe, the fins attached thereto, and the regenerator material are housed in a case such as a bath having a heat insulating wall.

[0005] In such a state, if a low-temperature heat medium is continuously flowed into the meandering cooling pipe for the cold storage operation, the cold storage material in the case is expected to be uniformly cooled, though it is expected. Unexpectedly, the cold storage material located at the left and right ends and in the vicinity of the inside of the case is cooled well, but the cold storage material located between both ends, that is, in the center of the case and in the vicinity thereof, is cooled. It is insufficient, and the temperature of the cold storage material at the center of the interior is higher than that at both ends. That is, when performing the cold storage operation using the conventional cold storage heat exchanger, there is a problem that the temperature distribution of the installed cold storage material becomes non-uniform.

On the other hand, when a relatively high-temperature heat medium is continuously flowed from the refrigerator into the heat exchanger for the cooling operation, contrary to the case of the cold storage operation, both ends in the case are reversed. The temperature of the cold storage material on the side is fast, so that the temperature of the cold storage material at both ends is always higher than that of the cold storage material in the inner central part. That is, even when the cooling operation is performed using the conventional regenerative heat exchanger, there is a problem that the temperature distribution of the installed regenerative material becomes uneven.

The reason why the temperature distribution of the cold storage material becomes non-uniform during the cold storage operation is not yet clear, but it may be due to the structure of the cold storage heat exchanger. As described above, the cooling pipe is formed in a meandering pipe, but the regenerator material is installed in a straight portion of the cooling pipe, and is not installed in a curved portion (U-shaped pipe). The cooling pipe is supported at both ends of the straight portion by the support member, and the curved portion is in a state of protruding outward from the support member. That is, it is considered that the cold storage material provided at the left and right ends and the vicinity thereof in the case is also cooled by the curved portion of the cooling pipe and the support member, and the temperature becomes lower than other cold storage materials.

[0008] In any case, if the temperature distribution of the regenerator material installed in the regenerative heat exchanger becomes non-uniform, it causes a problem in the effective use of nighttime electric power in addition to the regenerative operation and the cooling operation. That is, during the cold storage operation, there is a problem that a large amount of electric power is required to cool the cold storage material in the central portion inside the case to a desired low temperature. On the other hand, during the cooling operation, the temperature of some of the cold storage materials rises beyond the latent heat area before the other cold storage materials, and the temperature of the heat medium for extracting cold heat rises. There is.

[0009]

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a novel regenerative heat exchanger capable of suppressing non-uniform temperature distribution of a regenerator material during a regenerative operation and a regenerative operation. is there.

[0010]

One embodiment of the regenerative heat exchanger according to the present invention has the following features. (1) A fin having a corrugated shape, at least one or more tube members and a cold storage material, wherein the tube member penetrates two or more portions of the fins in the wave traveling direction. Regenerative heat exchanger.

(2) The regenerative heat exchanger according to (1), wherein the fin, at least one pipe member, and a regenerator material are accommodated in a case.

(3) The regenerative heat exchanger according to (1), wherein the fin has a sinusoidal, triangular or square waveform.

(4) The regenerative heat exchanger according to the above (1), wherein the regenerative material is accommodated in a container and is installed so as to be in contact with two or more waves of the fins.

The second embodiment of the regenerative heat exchanger according to the present invention has the following features. (5) At least a plurality of plate-like fins arranged at intervals, at least one pipe member penetrating these in the thickness direction, and a cold storage material, and the adjacent fins serve as a heat conductive member. The cold storage material is stored in a container,
A regenerative heat exchanger, wherein at least one of the plurality of plate-like fins is installed so as to contact the container.

(6) A plurality of plate-shaped fins, one or more pipe members, and a cold storage material are housed in the case (5).
A regenerative heat exchanger as described.

[0016]

The regenerative heat exchanger according to the above (1) to (4) comprises a fin having a corrugated plate shape and a pipe member penetrating at least two portions of the fin in the wave traveling direction. Have. In other words, the fins are continuous in a waveform in the longitudinal direction of the tube member. Further, the regenerative heat exchanger according to the inventions described in the above (5) and (6) has at least a plurality of independent fins and at least one pipe member, and the adjacent fins are heat conductive members. The fins are connected, and the fins are also continuous in the longitudinal direction of the pipe member in this embodiment. As described above, since the regenerative heat exchanger of the present invention is provided with the fins that are continuous in the longitudinal direction of the pipe member, even when the cold storage material has an uneven temperature distribution, the fins are continuously connected. Non-uniform temperature distribution can be reduced or eliminated in a short time due to good heat conduction due to the properties.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing an example of the first embodiment of the regenerative heat exchanger of the present invention. FIG. 1 shows only a part of the regenerative heat exchanger. As shown in the example of FIG. 1, the regenerative heat exchanger 23 of the present invention has at least a fin 24 having a corrugated shape, one or more pipe members 25, and the regenerator material 14. The tube member 25 penetrates two or more portions of the fin 24 in the wave traveling direction.

In the example of FIG. 1, the fin 24 has a square waveform. Each pipe member 25 is connected to form one pipe line (a pipe connecting between the pipe members 25 is omitted). The cold storage material 14 is housed in a container and has an elliptical cross section or It is formed in a columnar body having a similar shape. The cold storage material 14 is installed so as to contact the waves of the fins 24. Of the cold storage materials 14, those other than those placed at the ends of the fins 24 are in contact with two or more waves of the fins 24. The cold storage material 14 is also in contact with the tube member 25.

In the example of FIG. 1, the regenerative heat exchanger 23
Has a structure in which a plurality of fins 24 are stacked,
The top portion of the wave of each fin 24 is in contact with the cold storage material 14 installed on the adjacent fin 24. Therefore, FIG.
In the embodiment, the temperature distribution of the regenerator material is made uniform not only in the traveling direction of the waves of the fins 24, but also in the direction perpendicular thereto. The space between the fins 24 and the cold storage material 14 can function as an air passage when performing a cooling operation using a blower or the like.

In the first embodiment of the regenerative heat exchanger of the present invention, the fins may have a corrugated shape as shown in FIG. However, the waveform of the fin is not limited to the square shape shown in FIG. 1, but may be a sine wave shape, a triangular shape, or the like.

FIGS. 2 to 7 are views showing other examples of the first embodiment of the regenerative heat exchanger of the present invention, and are shown in perspective views. 2 to 7, the regenerative heat exchanger 23 includes:
Only a part is shown. The cold storage material is omitted.

As shown in the examples of FIGS. 2 to 7, 24 is a fin, and 25 to 27 are pipe members. H is the wave height of the fin 24, W is the width of the fin 24, and L is the fin 24.
Is the pitch of the wave. 2 to 7, a regenerative heat exchanger 23 includes a plate-like fin 24 having a corrugated shape and a tube member 25 penetrating the fin 24 (in the case of FIGS. 2 to 4), or a tube member 25. To 27 (in the case of FIGS. 5 to 7)
Consists of 2 and 5, FIG. 3 and FIG. 6, and FIG. 4 and FIG. 7 have the same waveform respectively. In FIG. 2 and FIG. 5, the fin 24 has a sine wave or a similar shape. 3 and 6 are triangular, and FIGS. 4 and 7 are square.

FIGS. 2 to 4 show the case where one tube member 25 is provided, and FIGS. 5 to 7 show the case where three tube members 25 to 27 are provided. There is no particular limitation as long as the number of penetrating pipe members is one or more,
In the example of three or more, the number is, for example, about 4 to 500, and in some cases, it may be more. All of them may be used exclusively for cold storage, or both cold storage and cooling may be performed as described above.
Further, a group of about 1 to 5 pipe members dedicated to cold storage and 1 to 5
A group of about five pipe members dedicated to cooling can be arranged alternately or randomly.

Each regenerative heat exchanger 23 shown in FIGS.
Can be manufactured by processing a long plate material as a raw material of the fins 24 into a corrugated shape in advance as shown in the drawing, and penetrating the tube member 25 or the tube members 25 to 27 in a skewered manner. Alternatively, a conventional finned tube, i.e. a tube having a large number of independent fins on a tube member, is first prepared and then the tips of adjacent fins are welded directly or via another thermally conductive member. It can also be manufactured by connecting them.

FIG. 8 is a perspective view showing an example of the second embodiment of the regenerative heat exchanger of the present invention. 8, only a part of the regenerative heat exchanger 23 is shown,
The cold storage material is omitted. As shown in the example of FIG. 8, the regenerative heat exchanger 23 of the present invention includes a plurality of independent plate-like fins arranged at intervals and one or more pipe members 25 penetrating these in the thickness direction. And a cold storage material (not shown). Adjacent fins 24 are connected by a heat conductive member 241. The cold storage material is accommodated in a container, and is installed so that the container contacts at least one of the plurality of plate-like fins. H is fin 24
, W is the width of the fins 24, and l is the pitch between the fins 24.

In the example shown in FIG. 8, the plurality of fins 24 are arranged such that the surface direction thereof is perpendicular to the tube member 25.
5 are arranged at a constant pitch l in the longitudinal direction. Further, the adjacent fins 24 are located at a position lower by a height h shown in FIG.
1 are connected by welding. The connection of the fins 24 by the heat conductive member 241 is made alternately above and below the fins 24 as shown. In the regenerative heat exchanger 23 shown in the example of FIG. 8, a plurality of fins 24 are welded by a heat conductive member 241 to be connected in a rectangular waveform as shown in FIG. It can be manufactured by penetrating the member 25.

When the plurality of fins 24 of the regenerative heat exchanger 23 of the present invention are not connected by the heat conductive member 241, their roots are in thermal contact with each other through the pipe member 25. In this case, the temperature difference is small, but the temperature difference with the adjacent fin is more likely to occur as the temperature is closer to the tip. Therefore, in the present invention, when the connection is made by the heat conductive member 241 like the fin 24 in FIG. 8, the range of the installation position of the heat conductive member 241 (the range of the height h in FIG. 8) is as follows.
1/5 or less of the height H of the fin 24, especially 1/10
It is preferable to set the following.

FIG. 9 is a perspective view showing another example of the second embodiment of the regenerative heat exchanger according to the present invention. In FIG. 9 as well, only a part of the regenerative heat exchanger 23 is shown, and the regenerator material is omitted. FIG.
Similarly, H is the wave height of the fins 24, W is the width of the fins 24, and l is the pitch between the fins 24.

In the example shown in FIG. 9, similarly to the example shown in FIG. 8, the plurality of fins 24 have a constant pitch l in the longitudinal direction of the tube member 25 so that the plane direction is perpendicular to the tube member 25.
It is arranged at. In the example of FIG. 9, the upper end and the lower end of each fin 24 are welded to each other and connected by a long plate-shaped heat conductive member 241. The regenerative heat exchanger 23 shown in the example of FIG. 9 has a plurality of fins 2 similar to that of FIG.
4 can be manufactured by welding the upper and lower portions thereof with a heat conductive member 241 into a ladder-shaped cross section as shown in FIG. Alternatively, it can be manufactured by utilizing a normal heat exchanger having a plurality of independent fins and welding the heat conductive member 241 onto the independent fins.

The material for forming the fins 24 in FIGS. 2 to 9 or the material for forming the heat conductive member 241 in FIGS. 8 to 9 is generally a metal material having good heat conductivity and mechanical strength, for example, Copper-based materials such as copper, brass, tough pitch copper, naval brass, phosphor bronze, nickel silver, aluminum bronze, beryllium bronze, aluminum-based materials such as various structural aluminum alloys, and other materials are used.

The thickness of the fins 24, the pitch L of the waves of the fins 24 (the pitch 1 between the fins 24 in the second embodiment), the height H of the fins 24, and the width W of the fins 24 are determined by the regenerative heat exchanger 23. , The outer diameter and the number of pipe members penetrating the fins 24, the heat exchange capacity, and the like. Generally, the thickness of the fins 24 is preferably about 0.2 mm to 2 mm, and the wave pitch L of the fins 24 is 4 mm to 10 mm.
About 0 mm is preferable.

FIG. 2 to FIG. 4 and FIG.
To the height H and width W of the fin 24 in the case of FIG.
In the case where the outer diameter of the tube member 25 is about 5 mm to 30 mm, it may be about 10 mm to 50 mm, and preferably about 10 mm to 40 mm. In the case of FIGS. 5 to 7 having the tube members 25 to 27, and further when a larger number of tube members are used, the corresponding fins 2 are used.
The width W of 4 may be increased in each of the above numerical ranges according to the increase in the number of pipe members.

Since the heat conductive member 241 has a function of minimizing the temperature difference between adjacent fins, especially the temperature difference between the tip portions of the fins, the thickness and width thereof are almost the same as those of the fins 24. It may be.

As a tube member constituting the regenerative heat exchanger of the present invention, a tube member formed of a metal material such as copper, aluminum, and SUS used in a conventional heat exchanger can be used. As the tube member, a heat conductive tube such as a copper tube having a plurality of grooves formed in the inner wall of the tube in parallel with or in the longitudinal direction of the tube member may be used.

In the regenerative heat exchanger according to the present invention, as a heat medium flowing inside the pipe member, a heat medium used or known in the art, for example, R-22 (CFC) can be used.

The regenerative material constituting the regenerative heat exchanger of the present invention is not limited as long as it can accumulate cold, and those which have been conventionally used and those which will be developed in the future can be used. Specifically, water, unsaturated to supersaturated aqueous solutions of various inorganic salts, inorganics such as inorganic salt hydrates, homogeneous mixtures of organic polymers such as ethylene-vinyl acetate copolymer and paraffin, ethylene glycol and the like Fluid or non-fluid cold storage materials such as organic substances in the temperature range of the cold storage operation and the cool-down operation are exemplified. A non-fluid cold storage material is preferred because a fluid cold storage material is generally inconvenient to handle, and there is a problem in that when a case accommodating the cold storage material is damaged, it flows out and contaminates the surroundings.

The regenerative material is preferably housed in a container as shown in FIG. The container is not particularly limited as long as it can accommodate the cold storage material without leaking. However, flexible materials such as polyethylene, polypropylene, polyvinyl chloride, polyester,
A material made of an organic polymer material such as nylon, polystyrene, or polyvinyl alcohol, or a composite material of the organic polymer material and a metal such as aluminum is preferable. Among these, a container made of a composite material having a four-layer structure of polyethylene film-nylon film-aluminum foil-nylon film, particularly a bag, is preferable from the viewpoint of excellent cold resistance, water resistance and thermal conductivity. It is convenient to use the non-fluid cold storage material in an appropriate size and thickness, such as a plate shape, a block shape, and a sheet shape.

The regenerative material may be provided at a position where heat exchange can be performed with the heat medium flowing in the tube member of the heat exchanger via fins (if the container is contained in a container). For example, in the case of the regenerative heat exchanger shown in FIGS. 1 to 7, it is preferable to install the regenerator so that at least a part of the surface of the regenerator material contacts the fin. In the case of the regenerative heat exchanger shown in FIGS. 8 and 9, it is preferable that at least a part of the surface of the regenerative material is installed so as to directly contact the fin and / or the heat conductive member. Thus, of the entire surface of the cold storage material (the container when contained in a container), at least one portion of the entire surface that directly contacts the fins or the heat conductive member is provided.
Preferably it is 0%, especially at least 30%.

The corrugated shape in the present invention means that mountain-like portions that are raised in the opposite direction are formed alternately. Further, in the present invention, the shape and size of each mountain-shaped portion may be slightly different from each other.

For example, the fins shown in FIGS. 1 to 7 are parallel to the reference plane (for example, in FIG.
It has a structure in which mountain-like portions (hereinafter simply referred to as “mountains”) are alternately provided on both sides of a surface including the central axis of the tube member 25. Further, since the fin is a plate-like material, each ridge has an inner or inner surface and an outer or outer surface of the ridge.

In order to further clarify the distinction between the inside and the outside of the mountain, a case where the mountain is alternately provided above and below the reference plane shown in FIGS. 1 to 7 is taken up. Corresponds to a place commonly referred to as a valley in a natural mountain. The lower mountain is connected to the upper mountain in the reference plane. Therefore, the inner surface of the lower mountain is connected to the outer surface (convex surface) of the upper mountain. When there are mountains alternately on the left and right sides of the reference plane, the inner surface of the right mountain is connected to the outer surface of the left mountain, for example, in the same manner as described above. 4 and 7 described below.
In the square waveform shown in FIG. 7, the upper and lower ridges are combined to form one continuous planar sidewall.

Next, an example of installation of a cold storage material in the cold storage type heat exchanger of the present invention will be described. When a short or long plate-like material is used as the cold storage material in the position where the waves are present, the cold storage material is brought into contact with two or more waves of the fins, in other words, it exists on one side of the reference plane. (See FIG. 10 described later), using a block-shaped cold storage material, and placing it mainly inside the mountain and at least a part of the inner surface of the mountain. An example is a method of setting so as to be in contact (see FIG. 11 described later), or a method of setting as shown in FIG. 13 described later.

As another example of the installation of the cold storage material, for example, when each fin 24 is independent, a block-shaped or sheet-shaped cold storage material is placed between the fins as shown in FIG. There is an embodiment in which the fins are installed, and an embodiment in which the fins are installed on a heat conductive member that connects adjacent fins.

If the regenerative heat exchanger of the present invention has a ventilation structure, in other words, if the regenerative heat exchanger has a ventilation passage from one side to the other side of the regenerative heat exchanger, the regenerative material has The stored cold heat can be taken out by blowing air by appropriate blowing means. Such a ventilating regenerative heat exchanger is, for example, a method using a ventilating material such as a perforated sheet material as a regenerative material, using a block-like material as a regenerative material as shown in FIG. It can be realized by a method of leaving a gap serving as a ventilation path therebetween, a method of providing a ventilation path between a pipe member and a cold storage material, or a fin of a heat exchanger and a cold storage material, or another method.

FIGS. 10 and 11 are views showing another example of the first embodiment of the regenerative heat exchanger of the present invention, and are shown in perspective views. FIG. 12 is a perspective view showing another example of the second embodiment of the regenerative heat exchanger of the present invention.

In the example of FIG. 10, a long plate-shaped cold storage material 14 is placed on the fins 24 of the regenerative heat exchanger 23 shown in FIG. Is installed. In this embodiment, the cold storage material 14 and the fins 24 are used.
The space 31 between them functions as a ventilation path.

In the example of FIG. 11, the space between the valleys of the fins 24 of the regenerative heat exchanger 23 shown in FIG. 4, that is, the space sandwiched between the outer surfaces 243 and 243 of the two upper mountains (the space 242 inside the lower mountain). ) Is filled with a cold storage material 14. In this example, the space 31 not filled with the cold storage material 14 functions as a ventilation path.

The embodiment shown in FIG. 12 has a structure similar to that of the regenerative heat exchanger shown in FIG. 9, and further has a blower 3. The regenerative heat exchanger 23 shown in FIG. 12 includes a plurality of fins 24 and pipe members 25 and 26. Each fin 24 has a constant pitch l in the longitudinal direction of the tube members 25 and 26 such that the plane direction is perpendicular to the tube members 25 and 26.
It is arranged at. A long plate-shaped heat conductive member 241 is welded to each end of each fin 24. In the figure, two sets of three pipe members 25 located in three upper and lower stages and three pipe members 26 also located in three upper and lower stages, and a total of six pipe members penetrate through many fins 24. The pipe members of each set are connected by semicircular joints 251 and 261 respectively. In addition, between each pair of adjacent fins 24, the cold storage material 14 is placed on every other fin 24 as shown in FIG.
It is installed in contact with. Each space 31 between the fins 24 where the cold storage material 14 is not installed functions as a ventilation path.

FIG. 13 is a sectional view showing another example of the first embodiment of the regenerative heat exchanger of the present invention. In the example of FIG.
The regenerative heat exchanger 23 is configured using a number of regenerative heat exchangers having fins 24 whose waveforms are triangular as shown in FIG. The fins 24 are stacked up and down such that the tips of the outer surfaces of the ridges abut each other. A columnar cold storage material 14 is loaded in contact with a part of the wall surface of the fin 24 in each space having a rhombic cross section generated by the stacking. The space 31 filled with the cold storage material remaining around the cylindrical cold storage material 14 functions as a ventilation path.

The regenerative heat exchanger of the present invention may be installed inside or outside the space to be cooled. Further, the regenerative heat exchanger of the present invention is housed in a case, that is, a fin,
One or more pipe members and a cool storage material may be accommodated in a case.

In such a case, if the regenerative heat exchanger is installed outside the space to be cooled, a heat insulating wall,
For example, a heat insulating tank formed of a multilayer wall filled with a heat insulating material such as an organic resin foam or glass wool between an inner wall and an outer wall made of a structural material such as an organic resin or metal having high mechanical strength. No. If the regenerative heat exchanger is installed inside the space to be cooled, a low heat insulating or substantially non-insulating wall, for example, a wall made of a structural material such as an organic resin or metal having high mechanical strength. A formed non-insulating tank is included.

The shape and internal volume of the case are not particularly limited. Examples of the shape of the case include a cube, a cylinder, and other shapes. When the case is installed outside the space to be cooled, the internal volume of the case may be determined so as to correspond to the internal volume of the space to be cooled and the required cooling temperature. When the case is installed inside the space to be cooled, a form capable of effectively cooling the space to be cooled in addition to the internal volume of the case, for example, a form in which a ventilation path for air sent from a blower is provided on a wall surface Good to be.

FIG. 14 is a view showing a conceptual example of the regenerative heat exchanger 23 of the present invention, and is shown in a sectional view. FIG.
In the example, 11 is a cold storage tank as an example of a case for storing a cold storage material, 13 is a heat insulating material layer provided on the cold storage tank 11,
Reference numeral 14 denotes a cold storage material, reference numerals 20 and 21 denote meandering pipes in the cold storage tank 11, and reference numeral 24 denotes a fin. The entire periphery of the regenerator 11 is insulated from outside air by the heat insulating material layer 13.
A cold storage material 14 is housed inside. Conduit 20,
Reference numerals 21 are respectively connected to a bypass line for cold storage and a bypass line for cooling, which will be described with reference to FIG. Both conduits 20 and 21 are arranged to penetrate fin 24. Note that in FIG.
Is located above the pipeline 20 and the upper and lower positions of the two do not match, but the upper and lower positions of the pipeline 20 and the pipeline 21 actually match, and both are in the horizontal direction. Lined up.

The cold storage pipe 20 has a function of transporting a low-temperature heat medium supplied from a heat medium supply source (not shown) to cool the cold storage material 14 in the cold storage tank 11. Therefore, the fins 24 function as cooling fins for releasing (radiating) the low temperature of the heat medium flowing in the pipe line 20 and applying cold heat to the cold storage material 14. On the other hand, the cooling water duct 21 has a function of acquiring cold heat stored in the cold storage material 14 and cooling the space to be cooled with the cold heat. The fins 24 acquire the cold heat of the cold storage material 14 (heat absorption), and transfer the cold heat to the still high-temperature heat medium supplied from the heat medium supply source in the cold storage heat exchanger 23 to cool it. Also have.

FIG. 14 shows an example in which two pipes, that is, a pipe 20 for cold storage and a pipe 21 for cooling, are installed in the cold storage tank 11. However, depending on the case, one or more pipes may be provided. Cold storage and cooling can be combined on the road. The fins at that time function as cooling for one time and heat absorbing for the other. Therefore, in the present invention, there is no particular need to provide a structural distinction between the pipeline 20 and the pipeline 21 including the structure and performance of the fin.

FIG. 14 shows an example in which the pipes 20 and 21 are formed in a meandering pipe so as to fill the inside of the cold storage tank 11. However, in order to achieve a uniform temperature distribution of the cold storage material, which is a subject of the present invention, It is preferable to provide fins at least on both ends of the regenerator 11 in the pipes of the regenerator 11. In the U-shaped portions at both ends, tubes without fins may be used.

In the regenerative heat exchanger of the present invention, the pipe member may be a meandering pipe as described above. There is no particular limitation on the method of the meandering piping, but for example, 5 to 1
Approximately 00 pipe members are arranged in the horizontal direction, and further similarly arranged above and below, and connected between adjacent upper and lower pipe members or between horizontally adjacent pipe members with a U-shaped joint or the like. Make a meandering pipe. In the meandering pipe having such a multi-stage structure, the temperature difference of the regenerator material is not only between the left and right ends in the case and the inner central portion, but also the upper end (ceiling side) and the lower end (bottom side) in the case. May also occur between This temperature difference between the upper and lower ends tends to occur particularly during the cooling operation. That is, since the cold energy due to the cold storage operation generally tends to be stored at the bottom side of the case, during the cooling operation, the heat medium moves from the bottom pipe member toward the top pipe member. Flowed to the heat exchanger. Thus, the temperature of the cold storage material is likely to increase as it approaches the upper end in the case. Therefore, in such a case, it is preferable to make the thermal connection of the fins not only in the horizontal direction of the case but also in the vertical direction as shown in FIG.

The connection between the horizontal direction and the vertical direction of the fins can be performed, for example, when at least a large number of the fins are vertically stacked as shown in FIGS. A part, preferably most or all, is physically connected by welding or other methods, or as shown in FIGS. 5 to 7, a large number of pipe members are combined into one large corrugated fin. This can be achieved by a multi-stage penetrating method.

Next, the effects of the regenerative heat exchanger of the present invention will be clarified by giving specific examples. Thickness 1mm, width 40
A 0 mm long aluminum flat plate was machined to form a square corrugated fin as shown in FIG. At that time, the fin has a height H of 530 mm, a width W of 400 mm, and a pitch L.
Is 50 mm, the workpiece has 23 pitches and the length is 1150 mm. On the other hand, a copper tube member for cold storage having an outer diameter of 15.9 mm, an inner diameter of 13.5 mm, and a length of 1250 mm, an outer diameter of 9.5 mm, an inner diameter of 7.9 mm, and a length of 1250 mm
And 70 pipes each for cooling and a total of 140 pipes were prepared, and these were 530 mm in height × 400 in width of the above square wave.
It was made to penetrate the surface of mm in 14 steps. In each of the 14 stages,
Five copper pipe members for cold storage and five copper pipe members for cooling,
The distance between the centers in the longitudinal direction of the tubes alternately and at intervals of 38 mm, and the vertical distance between the centers in the longitudinal direction of the tubes at the n-th stage and the (n + 1) -th stage also exists at 38 mm. Finally, each end of the copper tube member for cold storage and the copper tube member for cooling was connected by a U-shaped tube to form a meandering shape, thus obtaining a heat exchanger.

As a regenerator material, a regenerator material (latent heat temperature: 21 ° C.) of an aqueous solution of sodium chloride was used as a container (400 mm × 400 mm × composite material) of a polyethylene film-nylon film-aluminum foil-nylon film.
230 mm × 20 mm), which were placed on the above-described 14-stage tube members and in contact with at least one side surface of the fin wall existing on both sides thereof.

Next, the regenerative heat exchanger obtained above was made of aluminum in a case (internal dimensions: 1400).
(mm × 600 mm × 600 mm). The maximum temperature difference of the regenerative material between the both ends in the case and the inner central part during the regenerative operation in which a -30 ° C. heat medium (CFC R-22) is passed through the above-described copper tube member for regenerative storage is 1.8 ° C. The maximum temperature difference of the cold storage material between the both ends in the case and the central part during the cooling / cooling operation in which a 30 ° C. heat medium (same as above) is flowed through the cooling copper pipe member is 2.3 ° C. Met.

On the other hand, in the regenerative heat exchanger constructed in the same manner except that the fins were removed from the regenerative heat exchanger, when the heat medium was supplied in the same manner as described above, the maximum temperature difference during the regenerative operation was reduced. Was 7.2 ° C. The maximum temperature difference during the cooling operation was 11.5 ° C. From this, it can be confirmed that the use of the regenerative heat exchanger of the present invention can achieve a uniform temperature distribution of the regenerative material.

The regenerative heat exchanger of the present invention is suitable, for example, for a cooling system used for refrigerators, freezers, cold storages, etc., especially for a regenerative cooling system. Therefore, an example in which the regenerative heat exchanger of the present invention is used in a regenerative cooling system will be described below. FIG. 15 is a diagram showing an example of a regenerative cooling system using the regenerative heat exchanger of the present invention. This regenerative cooling system uses nighttime electric power to store cold heat in a regenerator material, and when the load in the daytime is large, extracts cold energy from the regenerator material to cool a cooled space such as a freezer.

In FIG. 15, the regenerative cooling system 4 comprises:
It comprises a refrigeration cycle 50, a regenerative bypass line 60, a refrigerating bypass line 70, and a regenerative heat exchanger 41. In the refrigeration cycle 50, a compressor 51, a condenser 52, a valve 53, an expansion valve 54, and an evaporator 55 are sequentially connected by a first heat medium pipe 56, while the evaporator 55
And the compressor 51 have a loop structure connected by a second heat medium pipe 57.

The regenerative bypass line 60 branches from a portion of the first heat medium pipe 56 that connects the condenser 52 and the valve 53, and is provided with a valve 61, a valve 62, and an expansion valve 6.
3, and the pipe line 20 of the regenerative heat exchanger 41 are sequentially connected to join the second heat medium pipe 57 downstream of the evaporator 55. The cooling water bypass pipe 70 branches from a portion of the cold storage bypass pipe 60 between the valve 61 and the valve 62, and sequentially connects the valve 71 and the pipe 21 in the cold storage heat exchanger 41. And joins the first heat medium pipe 56 before the expansion valve 54.

As the regenerative heat exchanger 41, FIGS.
0 to 13 and has a ventilation window and a cool air discharge window (both windows are not shown) in the case,
Further, a fan in which a blower 3 is installed in the cool air discharge window is used. The regenerative heat exchanger 41 is installed together with the evaporator 55 in the space to be cooled 8 such as in a freezer. The blower 3 blows cold heat obtained from the regenerative heat exchanger 41 into the space to be cooled 8. can do.

In the case of performing the normal operation in FIG. 15, the valve 53 is opened and the valve 61 is closed so that the heat medium from the condenser 52 flows through the first heat medium pipe 56. In this way, the heat medium expands when passing through the expansion valve 54 and enters a low-pressure low-temperature gas-liquid mixed state, and the evaporator 55 cools the inside of the cooled space 8. On the other hand, during the cold storage operation, the valve 53 and the valve 71
And the valves 61 and 62 are opened to open the condenser 5
The heat medium from 2 flows through the bypass line 60 for cold storage. Thus, the heat medium expands when passing through the expansion valve 63 and enters a low-pressure low-temperature gas-liquid mixed state, and cools the cold storage material (not shown) in the cold storage heat exchanger 41 when passing through the pipe 20. . In the cooling operation, the valve 53 and the valve 62 are closed, and the valve 61 and the valve 71 are opened to allow the heat medium from the condenser 52 to flow into the cooling bypass pipe 70. Thus, the heat medium still having a relatively high temperature is cooled by the cold heat of the cold storage material in the cold storage type heat exchanger 41 while passing through the pipeline 21, and then expands when passing through the expansion valve 54 to further reduce the pressure. The evaporator 55 cools the inside of the cooling space 8 in a low-temperature gas-liquid mixed state. In addition,
The cooling in the cooled space 8 may be performed by sending the cold heat in the regenerative heat exchanger 41 directly into the cooled space 8 by operating the blowing means 3 without flowing the heat medium.

[0068]

As described above, when the regenerative heat exchanger of the present invention is used, the regenerator material installed during the heat exchange between the heat medium and the regenerator material during the regenerative operation and the cooling operation is performed. Can be suppressed from becoming uneven in the temperature distribution. As a result, the efficiency of cold storage in the cold storage material during the cold storage operation is improved, and the nighttime power can be used more effectively. Further, during the cooling operation, the cold heat can be efficiently taken out, the output of the cold heat is stabilized, the temperature control in the space to be cooled is stabilized, and the temperature control becomes easy.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a first embodiment of a regenerative heat exchanger of the present invention.

FIG. 2 is a diagram showing another example of the first embodiment of the regenerative heat exchanger of the present invention.

FIG. 3 is a diagram showing another example of the first embodiment of the regenerative heat exchanger of the present invention.

FIG. 4 is a diagram showing another example of the first embodiment of the regenerative heat exchanger of the present invention.

FIG. 5 is a view showing another example of the first embodiment of the regenerative heat exchanger of the present invention.

FIG. 6 is a view showing another example of the first embodiment of the regenerative heat exchanger of the present invention.

FIG. 7 is a diagram showing another example of the first embodiment of the regenerative heat exchanger of the present invention.

FIG. 8 is a diagram showing an example of a second embodiment of the regenerative heat exchanger of the present invention.

FIG. 9 is a diagram showing another example of the second embodiment of the regenerative heat exchanger of the present invention.

FIG. 10 is a diagram showing another example of the first embodiment of the regenerative heat exchanger of the present invention.

FIG. 11 is a view showing another example of the first embodiment of the regenerative heat exchanger of the present invention.

FIG. 12 is a view showing another example of the second embodiment of the regenerative heat exchanger of the present invention.

FIG. 13 is a sectional view showing another example of the first embodiment of the regenerative heat exchanger of the present invention.

FIG. 14 is a diagram showing a conceptual example of a regenerative heat exchanger of the present invention.

FIG. 15 is a diagram showing an example of a regenerative cooling system using the regenerative heat exchanger of the present invention.

[Explanation of symbols]

 14 cold storage material 23 cold storage type heat exchanger 24 fin 25 pipe member

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L044 AA04 BA01 CA11 DC03 DD07 FA03 FA04 KA04 KA05 3L045 AA04 BA01 CA02 DA02 EA01 GA04 JA02 JA14 PA04 PA05 3L103 AA37 BB33 CC22 DD03 DD33 DD62

Claims (6)

[Claims] A fin having a corrugated shape, at least one or more tube members and a cold storage material, wherein the tube member penetrates two or more portions of the fins in the wave traveling direction. Features a regenerative heat exchanger. 2. The regenerative heat exchanger according to claim 1, wherein the fin, one or more pipe members, and a regenerator material are accommodated in a case. 3. The fin has a sinusoidal waveform, a triangular waveform,
The regenerative heat exchanger according to claim 1, wherein the heat exchanger is rectangular. 4. The regenerative heat exchanger according to claim 1, wherein the regenerator material is accommodated in a container and is installed so as to be in contact with two or more waves of the fin. 5. At least a plurality of plate-like fins arranged at intervals, at least one pipe member penetrating these in the thickness direction, and a cold storage material, and the adjacent fins are heat conductive. A regenerative heat exchanger, wherein the regenerator material is accommodated in a container, and the regenerative material is installed so that at least one of the plurality of plate-like fins contacts the container. 6. The regenerative heat exchanger according to claim 5, wherein a plurality of plate-like fins, at least one pipe member, and a regenerator material are accommodated in the case.