JP4132505B2 - Regenerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a regenerator that heats and concentrates a liquid.
[0002]
[Prior art]
Conventionally, a cooling system such as a gas cooling that performs cooling using the heat of vaporization when a refrigerant such as water evaporates has been used mainly in large-scale buildings. Such a cooling system includes an evaporator, an absorber, a regenerator, and a condenser as main components.
[0003]
The evaporator is maintained at a low pressure of about 1/100 atm, and water falling from the condenser evaporates at about 5 ° C. The water flowing in the circulation pipe connecting the indoor unit and the inside of the evaporator is cooled to about 7 ° C. cold water by the heat of vaporization at this time, and the indoor unit is cooled by exchanging heat with this cold water. .
[0004]
The water vapor evaporated in the evaporator enters the absorber through the pipe, where it is absorbed by lithium bromide. By absorbing water vapor in this way, the vicinity of the liquid level of the evaporator is not saturated with moisture, and vigorous evaporation is continued. Moreover, the inside of the evaporator is maintained at a low pressure by the lithium bromide absorbing water vapor.
[0005]
When the concentration of the lithium bromide solution is reduced by absorbing a large amount of water vapor, the absorption capacity gradually decreases. Therefore, in order to maintain the absorption action, the lithium bromide liquid is led to the regenerator, where it is heated to evaporate the water and concentrated, and then returned to the absorber again. The water vapor separated from the lithium bromide liquid in the regenerator is sent to the condenser, where it is cooled and condensed to become water, and returns to the evaporator again. By repeating the cycle as described above, cooling is continuously performed.
[0006]
Conventionally, in such a cooling system, a regenerator 300 as shown in FIG. 3 has been used. The regenerator 300 includes a combustion chamber 302 of a horizontal combustion type in which the combustion surface of the burner 301 is arranged vertically, and the combustion chamber 302 is separated from the surrounding five sides except for the side where the burner 301 exists with a certain gap. A liquid reservoir chamber 310 is disposed so as to surround the liquid reservoir chamber 310. The regenerator 300 heats the liquid in the liquid reservoir chamber 310 when the hot air emitted from the combustion chamber 302 passes through an exhaust passage 305 disposed so as to intervene with the liquid reservoir chamber.
[0007]
[Problems to be solved by the invention]
In order to spread the cooling system of the above-described type to general households, it is required to reduce the size and cost of the apparatus. However, the conventional regenerator as described above has a complicated structure and thus is downsized and reduced. There was a problem that pricing was difficult.
[0008]
The present invention has been made paying attention to such problems of the prior art, and heats an absorbing liquid such as a lithium bromide liquid in an apparatus that evaporates a refrigerant such as water and cools it with the heat of vaporization. It is an object of the present invention to provide a regenerator having a function of concentrating and having a simple structure and easy size reduction.
[0009]
[Means for Solving the Problems]
The gist of the present invention for achieving the object lies in the inventions of the following items.
[1] In a regenerator that heats and concentrates a liquid,
An outer cylinder (110), an inner cylinder (130), a heat receiving pipe (132), and a burner (150) ;
The outer trunk (110) stores the liquid,
The inner trunk (130) passes through the outer trunk (110) in a lateral direction so that a space remains on the upper and lower sides and at least one side.
The heat receiving pipe (132) vertically penetrates the inner body (130), and upper and lower ends thereof are opened inside the outer body (110).
The burner (150) is disposed at one end of the inner body (130) such that its combustion surface is substantially vertical and faces the heat receiving pipe (132).
The regenerator characterized in that at least the inner wall ceiling surface of the inner trunk (130) is inclined upward from the location where the burner (150) is located toward the side where the heat receiving pipe (132) is located .
[0010]
[2] In a regenerator that heats and concentrates a liquid,
An outer cylinder (110), an inner cylinder (130), a heat receiving pipe (132), and a burner (150);
The outer trunk (110) stores the liquid,
The inner trunk (130) passes through the outer trunk (110) in a lateral direction so that a space remains on the upper and lower sides and at least one side.
The heat receiving pipe (132) vertically penetrates the inner body (130), and upper and lower ends thereof are opened inside the outer body (110).
The burner (150) is disposed at one end of the inner body (130) such that its combustion surface is substantially vertical and faces the heat receiving pipe (132) .
The heat receiving pipe (132) is arranged so as to move away from the burner (150),
The regenerator characterized in that at least the bottom part of the inner cylinder (130) is inclined upward from the position where the burner (150) is located toward the side where the heat receiving pipe (132) is located .
[0012]
[ 3 ] The heat receiving pipe (132) is arranged so as to move away from the burner (150),
The regeneration according to [1] , wherein at least a bottom portion of the inner body (130) is inclined upward from a position where the burner (150) is located toward a side where the heat receiving pipe (132) is located. vessel.
[0013]
The present invention operates as follows.
A liquid (absorbing liquid) such as a lithium bromide liquid accumulated in the outer body (110) is heated while passing through the heat receiving pipe (132). Here, since the heat receiving pipe (132) is arranged vertically, and there is a gap between the side of the inner cylinder (130) and the outer cylinder (110), the heat receiving pipe is formed from below the inner cylinder (130). Natural convection occurs in a path that passes through (132) and reaches the upper part of the inner trunk (130) and again passes through the previous gap to the lower part of the inner trunk (130), thereby efficiently heating the liquid in the outer trunk (110). can do.
[0014]
For example, in the case of heating with the burner (150), the burner (150) has a combustion surface substantially vertical and the side of the heat receiving pipe (132) so as to correspond to the inner cylinder (130) functioning as a sideways combustion chamber. It is desirable to arrange so that it faces. Further, since the liquid is immediately present outside the inner cylinder (130) serving as the combustion chamber, the temperature rise of the wall surface of the inner cylinder (130) can be suppressed low, which contributes to improvement in durability.
[0015]
Furthermore, since the are is inclined upwardly inner wall ceiling surface of the inner cylinder (130) toward the side where there from the point with a burner (150) of heat pipe (132) even without low, drift upward flame Even so, it is difficult for the flame to blow directly on the ceiling surface of the inner trunk (130), and the durability is further improved.
[0016]
In addition, the heat receiving pipe (132) is arranged so as to move away from the burner (150), and at least the bottom of the inner body (130) is located from the place where the burner (150) is located to the side where the heat receiving pipe (132) is located. Since the liquid below the inner cylinder (130) tends to flow toward the opening at the lower end of the heat receiving pipe (132) along the bottom of the inner cylinder (130), natural convection occurs. To increase the heating efficiency. Moreover, since the bottom part of the inner trunk (130) is inclined, the condensed water generated inside the inner trunk (130) can be drained efficiently.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view of a regenerator 100 according to an embodiment of the present invention, and FIG. 2 is a perspective view of the main part of the regenerator 100.
[0018]
As shown in each figure, the regenerator 100 includes an outer cylinder 110 as a substantially box-shaped reservoir, an inner cylinder 130 as a combustion chamber penetrating the outer cylinder 110 sideways, a burner 150, a combustion chamber And a fan 160.
[0019]
As shown in FIG. 2, a certain amount of space is formed between the inner wall surface of the outer cylinder 110 and the outer wall surface of the inner cylinder 130 in both the upper, lower, left and right directions. Further, a plurality of heat receiving pipes 132 penetrates the inner cylinder 130 vertically, and the upper end and the lower end of each heat receiving pipe 132 are respectively opened inside the outer cylinder. Here, the upper and lower end surfaces of the heat receiving pipe 132 substantially coincide with the outer peripheral surface of the inner cylinder 130.
[0020]
A large number of fins 134 are attached around the heat receiving pipe 132 to increase the heat transfer area. A silencer 136 made of a baffle coil is attached inside the heat receiving pipe 132. In addition to the baffle coil, the silencer 136 may be inserted into the heat receiving pipe 132 as a silencer, for example, by twisting an elongated plate-like member.
[0021]
The burner 150 is disposed at one end of the inner cylinder 130 such that the combustion surface is substantially vertical and the combustion surface faces the side where the heat receiving pipe 132 exists. The inner cylinder 130 is inclined upward from the location where the burner 150 is present toward the side where the heat receiving pipe 132 is present. Further, the heat receiving pipe 132 is arranged so as to be shifted to the side away from the burner 150.
[0022]
The combustion fan 160 is disposed on the opposite side of the heat receiving pipe 132 with the burner 150 interposed therebetween, and blows air toward the burner 150 side. An end portion of the inner body 130 which is on the downstream side in the flow of the wind communicates with an exhaust cylinder (not shown).
[0023]
The regenerator 100 is a cooling device that performs cooling using the heat of vaporization when water evaporates, and is used for an evaporator, an absorber, a regenerator, and a condenser as main components. . Of course, an apparatus having a heating function in addition to the cooling function may be used.
[0024]
Next, the operation will be described.
First, the operation of the cooling device using the regenerator 100 will be described. Here, water is used as the refrigerant, and a lithium bromide liquid is used as the water absorption liquid. Water as a refrigerant circulates in the cooling device in the order of an evaporator, an absorber, a regenerator, a condenser, and an evaporator and is repeatedly used. The absorbing liquid is circulated between the absorber and the regenerator.
[0025]
The evaporator is maintained at a low pressure of about 1/100 atm (864.5 Pa), and water falling from the condenser evaporates at about 5 ° C. The water flowing in the circulation pipe connecting the indoor unit and the inside of the evaporator is cooled to about 7 ° C. cold water by the heat of vaporization at this time, and the indoor unit is cooled by exchanging heat with this cold water. .
[0026]
The water vapor evaporated in the evaporator enters the absorber through the pipe, where it is absorbed by lithium bromide. The lithium bromide liquid absorbs water vapor, so that the vicinity of the liquid level of the evaporator is not saturated with moisture, so that vigorous evaporation continues. Moreover, the inside of the evaporator is maintained at a low pressure by the lithium bromide absorbing water vapor.
[0027]
When the concentration of the lithium bromide liquid decreases due to the absorption of a large amount of water vapor, the absorption capacity gradually decreases. Therefore, in order to maintain the absorption action, the lithium bromide liquid is led to a regenerator where it is heated to absorb moisture. Is evaporated and concentrated, and returned to the absorber again. The water vapor evaporated and separated from the lithium bromide liquid in the regenerator is sent to the condenser, where it is cooled and condensed to become water, and returns to the evaporator again. Cooling is performed continuously by repeating the above-described cycle.
[0028]
In the regenerator 100, the exhaust when the burner 150 is burned is blown by the combustion fan 160 toward the side where the heat receiving pipe 132 is located. The lithium bromide liquid accumulated in the outer body 110 is heated while passing through the heat receiving pipe 132. Here, since the heat receiving pipe 132 is arranged vertically and there is a sufficient gap between the inner wall of the outer cylinder 110 and the outer wall of the inner cylinder 130 at the left and right sides of the inner cylinder 130, Through the heat receiving pipe 132, reaches the upper part of the inner cylinder 130, and again through the gap, reaches the lower part of the inner cylinder 130 again. Natural convection occurs, and the lithium bromide liquid accumulated in the outer cylinder 110 is removed. It can be heated efficiently and the water can be evaporated and concentrated.
[0029]
In addition, since the heat transfer area is increased by providing the fins 134 around the heat receiving pipe 132, the heat absorption is improved, and the liquid flowing through the heat receiving pipe 132 can be heated more efficiently.
[0030]
Further, since the liquid exists so as to be in direct contact with the outer side of the inner cylinder 130 serving as a combustion chamber, the temperature rise of the wall surface of the inner cylinder 130 can be suppressed low, which contributes to the improvement of durability. Here, the inner wall surface temperature of the inner body 130 is suppressed to about 100 ° C. to 150 ° C.
[0031]
In addition, while the combustion surface of the combustion fan 160 is kept substantially vertical, the inner cylinder 130 is inclined upward from the location where the burner 150 is present toward the side where the heat receiving pipe 132 is present, so that the flame drifts upward. However, it is difficult for the flame to blow directly on the ceiling surface of the inner trunk 130. Thereby, the durability of the inner trunk 130 is further improved.
[0032]
In addition, the heat receiving pipe 132 is arranged so as to move away from the burner 150, and the bottom portion of the inner body 130 is inclined upward from the position where the burner 150 is present toward the side where the heat receiving pipe 132 is present. The liquid accumulated below the inner cylinder 130 can easily flow along the bottom outer wall surface of the inner cylinder 130 toward the opening at the lower end of the heat receiving pipe 132. As a result, natural convection is promoted and the heating efficiency of the liquid is further increased. In addition, since the bottom wall surface is inclined also on the inner side of the inner cylinder 130, the condensed water generated inside the inner cylinder 130 can be drained efficiently. In addition, by arranging the silencer 136 inside the inner body 130, partial boiling and nucleate boiling are prevented.
[0033]
In addition, since the regenerator 100 according to the present invention has a simple structure in which the inner cylinder 130 is horizontally penetrated into the outer cylinder 110, it is easy to miniaturize and the apparatus price can be kept low.
[0034]
In the embodiment described above, an example in which the inner cylinder 130 penetrates the outer cylinder 110 in the lateral direction is shown, but it is only necessary to pass through the outer cylinder 110. For example, the inner cylinder 130 may be U-shaped, and the curved portion may pass through the outer cylinder 110. Further, in the embodiment, the inner cylinder and the outer cylinder have rectangular cross sections, but for example, the inner cylinder and the outer cylinder may be a cylinder having a cylindrical shape or a polygonal cross section.
[0035]
In the embodiment, a burner that burns gas, oil, or the like is used as a heat source, but an electric heater or the like may be used as a heat source. In this case, since it is not necessary to consider flame drift, the inner wall ceiling surface of the inner trunk 130 does not have to be inclined. In addition, in the embodiments, water is used as the refrigerant and the lithium bromide liquid is used as the absorbing liquid. However, the refrigerant and the absorbing liquid are not limited to these.
[0036]
【The invention's effect】
According to the regenerator according to the present invention, the inner cylinder is passed through the outer cylinder storing the liquid in a horizontal direction so that a gap remains in at least one side and at least one side, and the inner cylinder is vertically penetrated and the upper end thereof Since the heat receiving pipe is provided so that the lower end is opened inside the outer cylinder, the liquid passes through the heat receiving pipe from the lower part of the inner cylinder to the upper part of the inner cylinder and reaches the lower part of the inner cylinder through the gap. Natural convection occurs, and the liquid in the outer cylinder can be efficiently heated. In addition, since the inner cylinder through which the heat receiving pipe is vertically passed is penetrated horizontally in the outer cylinder, downsizing is easy and the cost of the apparatus can be kept low.
[0037]
In addition, since liquid immediately exists outside the inner cylinder serving as a combustion chamber, the temperature rise of the inner cylinder wall itself can be suppressed to a low level, which contributes to improved durability. Furthermore, since the burner combustion surface is substantially vertical, at least the inner wall ceiling surface of the inner cylinder is inclined upward from the location where the burner is located toward the side where the heat receiving pipe is located. The flames are less likely to be blown directly on the ceiling of the trunk, further improving durability.
[0038]
In addition, the heat receiving pipe is arranged so as to move away from the burner, and at least the bottom of the inner cylinder is inclined upward from the location where the burner is located toward the side where the heat receiving pipe is located, Therefore, it is easy to flow the liquid along the outer wall surface of the inner trunk bottom portion toward the opening at the lower end of the heat receiving pipe, so that natural convection is promoted and heating efficiency can be increased. In addition, since the inner trunk bottom portion is inclined, the condensed water generated inside the inner trunk can be drained efficiently.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a regenerator according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a regenerator according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view showing an example of a regenerator conventionally used.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100 ... Regenerator 110 ... Outer cylinder 130 ... Inner cylinder 132 ... Heat receiving pipe 134 ... Fin 136 ... Silencer 150 ... Burner 160 ... Combustion fan

Claims (3)

In a regenerator that heats and concentrates liquid,
An outer body, an inner body, a heat receiving pipe, and a burner ;
The outer trunk stores the liquid,
The inner cylinder passes laterally through the outer cylinder so that a space remains on the upper and lower sides and at least one side,
The heat receiving pipe vertically penetrates the inner cylinder and its upper and lower ends are opened inside the outer cylinder,
The burner is arranged at one end of the inner cylinder so that its combustion surface is substantially vertical and faces the heat receiving pipe,
A regenerator characterized in that at least an inner wall ceiling surface of the inner trunk is inclined upward from a location where the burner is present toward a side where the heat receiving pipe is present. In a regenerator that heats and concentrates liquid,
An outer body, an inner body, a heat receiving pipe, and a burner;
The outer trunk stores the liquid,
The inner cylinder passes laterally through the outer cylinder so that a space remains on the upper and lower sides and at least one side,
The heat receiving pipe vertically penetrates the inner cylinder and its upper and lower ends are opened inside the outer cylinder,
The burner is arranged at one end of the inner cylinder so that its combustion surface is substantially vertical and faces the heat receiving pipe ,
The heat receiving pipe is arranged so as to move away from the burner,
A regenerator characterized in that at least a bottom portion of the inner cylinder is inclined upward from a location where the burner is present toward a side where the heat receiving pipe is present. The heat receiving pipe is arranged so as to move away from the burner,
2. The regenerator according to claim 1 , wherein at least a bottom portion of the inner cylinder is inclined upward from a position where the burner is present toward a side where the heat receiving pipe is present.

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