JPH10246528A - Air cooled absorption type freezer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a heat loss of a high temperature refrigerant and absorbing liquid and further improve a heating performance by a method wherein each of a gas-liquid separator, a heater and a dilute solution receiver is integrally assembled from each other and in particular the heater is assembled in the dilute solution receiver. SOLUTION: A dilute solution receiver 16 is formed by a cylindrical receiver body 17 having a bottom section with a sufficient inner diameter for storing a gas-liquid separator 1, a plane of the bottom section 18 is made to be continuous and integral with planes of the bottom sections 5a, 5b of the gas-liquid separator 1 and in turn each of a refrigerant vapor supplying pipe 12 passing through a closed ceiling section 19 and reaching up to a low temperature regenerator and the dilute solution supplying pipe 21 passing through a side wall section 20 and extending from a high temperature solution heat exchanger is communicated to each other and opened. An opening part of the dilute solution supplying pipe 21 is provided with a float valve 22 so as to control an amount of supplying dilute solution to the high temperature regenerator. In addition, a heat coil 24 acting as a heater for heating and increasing temperature of a refrigerant vapor storing space 11 of the gas-liquid separator 1 is wound around an outer circumference of the upper part of the separator body 2 of the gas-liquid separator 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of an air-cooled absorption refrigeration system.

[0002]

2. Description of the Related Art In an absorption refrigerating apparatus using, for example, water as a refrigerant and lithium bromide as an absorbing liquid, a dilute solution after the completion of absorption is heated and boiled by a high-temperature regenerator and then cooled by a gas-liquid separator. It separates into a vapor and an intermediate concentrated solution (for example, see Japanese Patent Publication No. 6-21743).

On the other hand, among the absorption refrigeration systems, for example, in the case of an air-cooled absorption refrigeration system in which the heat absorbed in an absorber is cooled by an air-cooling method, generally, even during a heating operation in winter, heat is taken out to extract heat. Although an absorption / evaporator for cooling is used in combination, heat loss will increase if it is used as it is.
Therefore, a dedicated heater is usually provided separately. In addition, the diluted solution supplied to the high-temperature regenerator after the completion of the absorption action is transported by a solution pump, but in order to prevent empty cooking and control the liquid level in the high-temperature regenerator, Normally, a dilute solution receiver is installed separately for the high temperature regenerator,
A liquid level control means such as a float valve is provided therein (for example, see Japanese Patent Publication No. 6-38009).

[0004]

However, in the case where a heater is provided separately from the gas-liquid separator as described above, the heat loss of the high-temperature refrigerant and the absorption liquid due to heat radiation is large. In addition, in the case of a configuration in which a dilute solution receiver and liquid level control means are separately provided on the high temperature regenerator side, there is a problem that the structure on the high temperature regenerator side becomes complicated and large.

The present invention has been made to solve such a problem, and the above-mentioned gas-liquid separator, heater and dilute solution receiver are integrated with each other, and in particular, the heater is incorporated in the dilute solution receiver. By making it compact and simple, heat loss is reduced, and furthermore, switching between the cooling and heating operations can be easily performed only by controlling the opening and closing of the inlet and outlet pipes of the refrigerant vapor, the intermediate concentrated solution, and the diluted solution. It is an object of the present invention to provide an air-cooled absorption refrigeration apparatus that solves the above conventional problems.

[0006]

Means for Solving the Problems In order to achieve the object, each invention of the present application is provided with the following means for solving the problems.

That is, the air-cooled absorption refrigeration apparatus according to the first aspect of the present invention is a gas-liquid separator for separating a dilute solution in a gas-liquid two-phase state heated by a high-temperature regenerator into a refrigerant vapor and an intermediate concentrated solution. A warmer for heating the refrigerant vapor separated by the gas-liquid separator, and a dilute solution receiver having a liquid level control function of supplying the dilute solution after completion of the absorption to the high-temperature regenerator, The first cylindrical body of the portion constitutes a gas-liquid separator and the second cylindrical body provided at a predetermined interval on the outer peripheral side of the first cylindrical body has a dilute solution receiver. And a heater is provided inside the second cylindrical body with respect to the first cylindrical body constituting the gas-liquid separator, so as to be integrated with each other.

Therefore, in this configuration, a heater for supplementing heat loss during the heating operation in winter is provided for the gas-liquid separator constituted by the first cylindrical body, and these are connected to the second cylinder. It is integrated into a double-tube structure in a dilute solution receiver that has a function of controlling the amount of dilute solution supplied to the high-temperature regenerator, which is made up of a container. As much as possible, the structure of the entire absorption refrigeration apparatus can be further reduced in size.

Further, since the gas-liquid separator is generally provided above the high-temperature regenerator, the dilute solution receiver is integrated with the gas-liquid separator, so that the dilute solution from the dilute solution receiver to the high-temperature regenerator is removed. When supplying the liquid, a stable head can be obtained.

Next, an air-cooled absorption refrigeration apparatus according to a second aspect of the present invention is based on the configuration of the first aspect of the invention, and the first cylindrical body in the configuration has a partition plate interposed therebetween. hand,
A gas-liquid separation means for separating a dilute solution in a gas-liquid two-phase state from the high-temperature regenerator into a refrigerant vapor and an intermediate concentrated solution; and a refrigerant vapor separated in the gas-liquid separation chamber and an intermediate concentrated liquid. And a gas-liquid storage chamber for storing the solution at two upper and lower positions, wherein the intermediate concentrated solution is stored in a lower intermediate concentrated solution storage section below the gas-liquid storage chamber, in a low-temperature regenerator during cooling, and during heating. The intermediate concentrated solution supply pipes respectively supplying the high temperature regenerators are communicated with each other, and the upper refrigerant vapor storage section is openly communicated above the internal space of the second cylindrical body, while the second refrigerant vapor storage section is communicated with the second concentrated solution supply pipe. A dilute solution receiver chamber is formed in the cylindrical body, a refrigerant vapor supply pipe for supplying refrigerant vapor to the low-temperature regenerator during cooling at the upper part of the dilute solution receiver chamber, and an intermediate part from the absorber. A dilute solution supply pipe and a dilute solution supply pipe to the high temperature regenerator are connected at the bottom. It is allowed.

Therefore, in this configuration, the dilute solution in the gas-liquid two-phase state from the high-temperature regenerator is separated into the refrigerant vapor and the intermediate concentrated solution in the gas-liquid separation chamber, and the refrigerant vapor in the dilute solution is cooled only during cooling. While being supplied to the low-temperature regenerator via the supply pipe, the intermediate concentrated solution is supplied to the low-temperature regenerator via the intermediate concentrated solution supply pipe during cooling, while being supplied to the high-temperature regenerator during heating. In addition, a predetermined amount of the dilute solution from the absorber is supplied to the dilute solution receiver chamber in accordance with the fluctuation of the storage amount, and the liquid level is controlled to a stable state so as not to cause the high-temperature regenerator to be idle. Supplied with a head.

With the above arrangement, the switching between the cooling and heating operations can be easily performed only by appropriately controlling the opening and closing of the inlet and outlet lines of the refrigerant vapor, the intermediate concentrated solution, and the dilute solution, for example.

The air-cooled absorption refrigeration apparatus according to the third aspect of the present invention includes a gas-liquid separator for separating a dilute solution in a gas-liquid two-phase state heated by a high-temperature regenerator into a refrigerant vapor and an intermediate concentrated solution. ,
A heater for heating the refrigerant vapor separated by the gas-liquid separator, and a dilute solution receiver having a liquid level control function of supplying a dilute solution after the completion of the absorption operation to the high-temperature regenerator; The interior of the cylindrical body is divided into two sections, a first chamber and a second chamber, through a partition plate.
A first chamber that forms a gas-liquid separator with the first chamber, a second chamber that forms a dilute solution receiver, and a first chamber that forms the gas-liquid separator inside the second chamber.
By providing a heater to the chamber, they are integrated with each other.

Therefore, in this configuration, a heater for supplementing heat loss during the heating operation in winter is provided for the gas-liquid separator constituted by the first chamber, and these are connected to the high temperature constituted by the second chamber. Since the dilute solution receiver having the function of controlling the amount of dilute solution supplied to the regenerator is formed side by side in the cylindrical body and integrally formed, the heat loss of the high-temperature refrigerant and the absorption liquid is reduced as much as possible. And the overall structure of the absorption refrigeration system can be further reduced in size.

Further, since the gas-liquid separator is generally provided above the high-temperature regenerator, the dilute solution receiver is integrated with the gas-liquid separator, so that the dilute solution from the dilute solution receiver to the high-temperature regenerator can be obtained. When supplying the liquid, a stable head can be obtained.

Further, an air-cooled absorption refrigeration apparatus according to a fourth aspect of the present invention is based on the configuration of the third aspect of the present invention. A gas-liquid separation chamber for separating the dilute solution in a gas-liquid two-phase state from the vessel into a refrigerant vapor and an intermediate concentrated solution and storing the separated refrigerant vapor and the intermediate concentrated solution at two upper and lower positions; In the lower intermediate concentrated solution storage section of the gas-liquid separation chamber, intermediate concentrated solution supply pipes for supplying the intermediate concentrated solution to the low temperature regenerator during cooling and to the high temperature regenerator during heating are communicated with each other. The side refrigerant vapor storage part is communicated with the upper part of the second chamber side space part, while a dilute solution receiver chamber is formed in the second chamber, and a low temperature regenerator during cooling is provided above the dilute solution receiver chamber. Vapor supply pipe that supplies refrigerant vapor to the Dilute solution supply pipe from the absorber to the intermediate portion, the bottom dilute solution supply pipe to the high-temperature regenerator is caused to each communication.

Therefore, in this configuration, the dilute solution in the gas-liquid two-phase state from the high-temperature regenerator is separated into the refrigerant vapor and the intermediate concentrated solution in the gas-liquid separation chamber, and the refrigerant vapor in the dilute solution is cooled only during cooling. While being supplied to the low-temperature regenerator via the supply pipe, the intermediate concentrated solution is supplied to the low-temperature regenerator via the intermediate concentrated solution supply pipe during cooling, while being supplied to the high-temperature regenerator during heating. In addition, a predetermined amount of the dilute solution from the absorber is supplied to the dilute solution receiver chamber in accordance with the fluctuation of the storage amount, and the liquid level is controlled to a stable state so as not to cause the high-temperature regenerator to be idle. Supplied with a head.

In the above-described manner, the switching between the cooling and heating operations can be easily performed by, for example, appropriately controlling the opening and closing of the inlet and outlet pipes of the refrigerant vapor, the intermediate concentrated solution, and the dilute solution.

[0019]

As described above, according to the air-cooled absorption refrigeration apparatus of the present invention, the heat loss of the high-temperature refrigerant and the absorption liquid is small and the heating performance is high despite the simple structure, compactness and low cost. An air-cooled absorption refrigeration apparatus can be obtained.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIGS. 1 and 2 show the configuration of an air-cooled absorption refrigeration apparatus according to Embodiment 1 of the present invention.

In the present embodiment, in order to solve the above-mentioned conventional problem, a heater is provided for the gas-liquid separator, and these are assembled into a dilute solution receiver by integrating them. In addition to reducing the heat loss of the heater and reducing the heat loss of the heater, the switching of the cooling and heating operation can be easily performed only by controlling the opening and closing of the inlet and outlet pipes of the refrigerant vapor, the intermediate concentrated solution, and the diluted solution. It is characterized by doing.

In the figure, reference numeral 1 denotes a gas-liquid separator, and reference numeral 2 denotes a bottomed cylindrical closed-structured separator (first cylindrical body) which is a main body casing of the gas-liquid separator 1. . Inside the separator body 2, for example, a space excluding the upper part in the separator body 2 is partitioned into first and second two vertically long spaces 4 a and 4 b having a semicircular cross-section each having a substantially right and left half. As described above, the partition plate 3 extending upward at a predetermined height is provided. Then, into the first space 4a on the left side of the drawing, for example, formed by the partition plate 3, the tip of a liquid pumping pipe 6 from a high-temperature regenerator (not shown) is introduced through the bottom 5a. Upper end 3
The opening is provided at a position lower by a predetermined dimension than the position a.

On the other hand, an intermediate concentrated solution supply pipe 7 to the low temperature regenerator (not shown) is introduced into the second space 4b forming the right side refrigerant vapor and the intermediate concentrated solution storage chamber, and is located at the bottom 5b surface position. It is open at.

The partition plate 3 is integrally provided with a collision plate 8 which extends substantially horizontally from the upper end 3a toward the first space 4a. The first space 4a below the collision plate 8 forms a collision separation chamber (gas-liquid separation chamber) between the refrigerant vapor and the intermediate concentrated solution by the collision plate 8.
The impingement plate 8 has a size sufficient to cover, for example, the opening at the tip of the liquid pumping tube 6, but has a dimension such that a predetermined interval can be maintained between the impingement plate 8 and the inner peripheral surface of the side wall of the separator body 2. Is formed in a semi-elliptical shape.

In the lower part of the partition plate 3, an intermediate concentrated solution discharge port 9 having a liquid level control function having a predetermined vertical width which is long in the front-rear direction is provided as shown in the figure.

Further, the second space 4 in the separator body 2
In the refrigerant vapor storage space 11 above the collision plate 8 communicating with the b, a large number of punching holes 15, 15.
.. First and second baffle plates 1 having a tray structure provided with
3, 14 are provided with another predetermined interval in the vertical direction,
A receiver body (second cylindrical body) of the dilute solution receiver 16 on the outer peripheral side via the first and second baffle plates 13 and 14.
17 is open to the space above. The refrigerant vapor in the refrigerant vapor storage space 11 is supplied to the low-temperature regenerator through a refrigerant vapor supply pipe 12 that is open to the upper space of the receiver body 17.

The gas-liquid separator 4 configured as described above separates the boiling gas-liquid from the high-temperature regenerator into the refrigerant vapor and the intermediate concentrated solution with high separation efficiency, and stores the separated intermediate concentrated solution. The liquid level is regulated to an appropriate level. In this case, particularly in the case of the present embodiment, a large number of punching holes 15, 15,.
The first and second baffle plates 13 and 14 are provided, and the refrigerant vapor is extracted to the low-temperature regenerator side through them, so that a more intermediate concentrated solution is mixed into the refrigerant vapor. Can be made difficult.

On the other hand, the dilute solution receiver 16 is formed by a bottomed cylindrical receiver body 17 having an inner diameter sufficient to incorporate the gas-liquid separator 1 having the above-described structure.
The surface is continuously integrated with the bottom portions 5a and 5b surfaces of the gas-liquid separator 1, while the refrigerant vapor supply pipe 12 to the low-temperature regenerator passes through the closed ceiling 19 as described above. Dilute solution supply pipes 21 from the high-temperature solution heat exchanger penetrate through the side wall portion 20 and are respectively opened.

At the opening of the dilute solution supply pipe 21, a float valve 22 for opening and closing the opening corresponding to the dilute solution level in the receiver 17 is provided. Is controlled.

That is, the bottom 1 of the receiver 17
8, a base end side of a dilute solution supply pipe 23 to the high temperature regenerator side is opened to communicate, and the dilute solution stored in the receiver unit 17 is appropriately supplied to the high temperature regenerator side to be heated and boiled. The float valve 2 is supplied with a sufficient amount of head according to the fluctuation of the storage amount.
2 automatically controls in accordance with the cooling / heating operation state, prevents empty cooking on the high temperature regenerator side, and realizes appropriate and easy stable liquid amount control.

A heating refrigerant (R407C) circulating in the secondary refrigeration cycle is introduced and led out during heating operation as shown by an arrow to heat and raise the refrigerant vapor storage space 11 of the gas-liquid separator 1. A heating coil serving as a heater for heating, which is wound around the outer periphery of the upper part of the separator body 2 of the gas-liquid separator 1. As a result, the shortage of the heat quantity of the cooling / absorber combined use system during the heating operation in winter in the absorption refrigeration system employing the air cooling system in which the temperature of the refrigerant vapor rises is compensated.

The refrigerant vapor supply pipe 12 is controlled so as to be opened during the cooling operation and closed during the heating operation, for example, by providing an electromagnetic on-off valve. Further, the intermediate concentrated solution supply pipe 7 is switched by, for example, an electromagnetic switching valve so as to communicate with the low-temperature regenerator during the cooling operation and communicate with the high-temperature regenerator during the heating operation.

As described above, in the case of this embodiment, the heating coil 24 for compensating for the heat loss during the heating operation in winter is provided in the compact gas-liquid separator 1, and these are supplied to the high-temperature regenerator. The heat loss of the high-temperature refrigerant and the absorption liquid is reduced, and the overall structure of the absorption refrigeration apparatus is integrated because the double-tube structure is integrated in the dilution solution receiver 16 having the function of controlling the supply amount of the diluted solution. Can also be made more compact.

Next, FIG. 2 shows the configuration of an air-cooled absorption refrigeration system that employs such a gas-liquid separator having an integrated structure of a heater and a dilute solution receiver.

In the air-cooled absorption refrigeration apparatus shown in FIG. 2, for example, an aqueous solution of lithium bromide (aqueous solution of LiBr) is used as the absorbing liquid as described above, and steam is used as the refrigerant (the liquid to be absorbed). .

In FIG. 2, reference numeral 30 denotes a high-temperature regenerator, which includes a heating source 31 such as a gas burner. Above the high-temperature regenerator 30, a gas-liquid separator 1 communicated via a liquid pumping pipe 6 is provided. In the high-temperature regenerator 30, the lithium bromide dilute solution c is heated and boiled, and supplied to the gas-liquid separator 1 located above via the liquid pumping tube 6,
Here, separation and regeneration are performed into steam a and a lithium bromide intermediate concentrated solution (intermediate concentration absorbing solution) b.

The dilute lithium bromide solution c is obtained by absorbing water d as a refrigerant into a lithium bromide intermediate concentrated solution b as an absorbing liquid in an air-cooled absorber 32 described later. After being preheated through the high-temperature solution heat exchanger 34 and supplied to the dilute solution receiver 16 of the gas-liquid separator 1, it is returned to the high-temperature regenerator 30.

As described above, the gas-liquid separator 1 is connected to a heating refrigerant (for example, R407C) that circulates in the secondary cycle X including the use-side heat exchanger 43 on its outer peripheral side. Heat exchange with the subsequent steam a is performed, and a heating coil 24 serving as a heat source at the time of the heating operation in winter is wound.
The steam a after heat exchange with the heating coil 24 is sent to the low temperature regenerator 35 and condensed condensed refrigerant liquid (that is, condensed water)
Is returned to the high temperature regenerator 30 together with the dilute solution. Further, the lithium bromide intermediate concentrated solution b separated in the gas-liquid separator 1 is cooled by the high-temperature solution heat exchanger 34.
After the heat exchange with the dilute lithium bromide solution c in the above, it is supplied to the low temperature regenerator 30, while it is returned to the high temperature regenerator 30 during heating. Reference numeral 36 denotes an exhaust gas passage for discharging exhaust gas.

In the low-temperature regenerator 35, during cooling, the steam a supplied from the gas-liquid separator 1 and the lithium bromide concentrated solution b are subjected to heat exchange to condense the steam a and concentrate the lithium bromide. The residual water contained in the solution b is evaporated to take out a lithium bromide solution having a higher concentration.

The steam a evaporated from the lithium bromide concentrated solution b in the low-temperature regenerator 35 is supplied to the air-cooled condenser 3.
The condensed water is sent to 7 and condensed and liquefied to become condensed water d and stored in the refrigerant tank 38. The condensed water d condensed and liquefied in the low-temperature regenerator 35 is also stored in the refrigerant tank 38.

The condensed water d stored in the refrigerant tank 38
Is supplied to the spraying device 41 of the evaporator 40 by the refrigerant pump 39. The concentrated lithium bromide solution b taken out of the low-temperature regenerator 35 exchanges heat with the dilute lithium bromide solution c in the low-temperature solution heat exchanger 33, and then is transferred to the absorption liquid distribution container 42 of the air-cooled absorber 32. Supplied. The evaporator 40 exchanges heat between the refrigerant (for example, R407C) circulating in the secondary-side refrigerant cycle X including the use-side heat exchanger 43 and the condensed water d sent from the refrigerant tank 38 during cooling operation. Source of cold.

Then, the lithium bromide dilute solution c taken out of the air-cooled absorber 32 passes through the low-temperature solution heat exchanger 33 and the high-temperature solution heat exchanger 34 by the solution pump 44 as described above. Is returned to.

The air-cooled absorber 32 has a plurality of absorption heat transfer tubes 45 through which the absorption liquid b flows vertically.
Radiation fins 46, 46... Provided on the outer periphery of the absorption heat transfer tubes 45, 45.
Provided at the upper part of the heat transfer tubes 45, 45
And an absorption liquid distribution container 42 for distributing the absorption liquid b. The evaporator 40 and the spraying device 41 for supplying the refrigerant liquid d to the outer periphery of the evaporator heat transfer tubes 47, 47... In the evaporator 40 are built in the absorbing liquid distribution container 42. .

The evaporator 40 is provided with evaporative heat transfer tubes 47 through which the refrigerant circulating in the secondary cycle X including the use-side heat exchanger 43 flows, as described above. The heat transfer tubes 47, 47,... Are arranged so as to form a horizontal multistage of six rows.

(Embodiment 2) Next, FIGS. 3 and 4
Shows the configuration of an air-cooled absorption refrigeration apparatus according to Embodiment 2 of the present invention.

In this embodiment, as shown in FIGS. 3 and 4, the gas-liquid separator, the heating coil of the heater and the dilute solution receiver are integrated into a single cylindrical container. I have.

In the figure, first, reference numeral 50 denotes a bottomed cylindrical hermetically closed body which is a main body casing for integrally forming the gas-liquid separator 1 and the dilute solution receiver 16 in parallel with each other. Inside the container 50, for example, the first and second two vertically long spaces (chambers) 4 a, 4 b having a semicircular cross-section, each having a substantially right and left half except for a space excluding only the upper end portion of the container 50. There is provided a partition plate 3 extending upward by a predetermined height so as to partition the partition plate. Then, a first space (first left side in the figure) forming a gas-liquid separation chamber of the gas-liquid separator 1 formed by the partition plate 3.
In the chamber 4a, a tip 6a of a liquid pumping pipe 6 from a high-temperature regenerator (not shown) is inserted through a bottom 5a thereof for a predetermined length, and after being bent horizontally in the vicinity of the bottom as shown in the figure. The opening at the tip 6a side is opened toward the partition plate 3, which is a part of the inner wall of the vessel.

Then, the boiling gas-liquid supplied from the high-temperature regenerator supplied at a predetermined supply pressure is caused to collide with the partition plate 3 at a predetermined swirl angle to form a swirling vortex. In this manner, the intermediate concentrated solution component is effectively separated vertically into the refrigerant vapor and the intermediate concentrated solution without scattering.

On the other hand, above the first space 4a forming the gas-liquid separation chamber, a number of punching holes 15, 15,.
A baffle plate 13 composed of a punching plate having a refrigerant vapor storage chamber 4c for temporarily storing the separated refrigerant vapor is formed above the baffle plate 13. On the other hand, an intermediate concentrated solution supply pipe 7 to the low-temperature regenerator side (not shown) is introduced to the side of the bottom of the first space 4a forming the gas-liquid separation chamber, and is opened substantially at the surface of the bottom 5b.

The partition plate 3 is formed at its upper end with a communication port 3a to the second space 4b forming the dilute solution receiver 16, and the refrigerant vapor storage chamber 4c is formed with the communication port 3a. Through the second space 4b to a refrigerant vapor supply pipe 12, which will be described later.

The gas-liquid separator 1 thus configured separates the boiling gas-liquid from the high-temperature regenerator (not shown) into the refrigerant vapor and the intermediate concentrated solution with good separation efficiency, and converts the intermediate concentrated solution into the intermediate concentrated solution. The solution supply pipe 7 is maintained at an appropriate level according to the height of the opening. In this case, particularly in the case of the present embodiment, a large number of punching holes 15 are provided between the solution supply pipe 7 and the refrigerant vapor storage chamber 4c. , 15 baffle plate 13
Is provided, and the separated refrigerant vapor is extracted to the refrigerant vapor storage chamber 4c side through the refrigerant vapor, so that it is possible to make it more difficult to mix the intermediate concentrated solution into the refrigerant vapor.

On the other hand, the dilute solution receiver 16 is formed by the second space (second chamber) 4b as described above, and the refrigerant vapor supply pipe 12 to the low temperature regenerator is provided on the upper side. In addition, dilute solution supply pipes 21 from the high temperature solution heat exchanger are respectively opened at the side portions at the intermediate position.

The opening of the diluted solution supply pipe 21 is provided with a float valve 22 for opening and closing the opening in accordance with the level of the diluted solution in the diluted solution receiver 16. Is controlled.

That is, the bottom 5b of the second space 4b
The base end side of the dilute solution supply pipe 23 to the high temperature regenerator side communicates with the high temperature regenerator side, and the dilute solution stored in the second space 4b is appropriately supplied to the high temperature regenerator side to be heated and boiled. The supply amount is automatically controlled by the float valve 22 in accordance with the cooling / heating operation state in accordance with the fluctuation of the storage amount, and the high-temperature regenerator is prevented from being emptied. In addition, easy liquid amount control can be realized.

The heating refrigerant (R407C) circulating in the secondary refrigeration cycle is introduced and led out as indicated by an arrow during the heating operation in winter, so that the refrigerant vapor storage chamber 4c of the gas-liquid separator 1 is introduced. This is a heating coil of a heater that heats and raises the temperature, and is provided adjacent to a portion of the partition plate 3 corresponding to the refrigerant vapor storage chamber 4c on the upper side of the gas-liquid separator 1. As a result, the temperature of the refrigerant vapor rises, and the shortage of the calorific value of the combined cooling / absorption / evaporator system during the heating operation in winter in the absorption refrigeration system employing the air cooling system is compensated.

In the above configuration, the refrigerant vapor supply pipe 12 is controlled so as to be opened during the cooling operation and closed during the heating operation, for example, by providing an electromagnetic on-off valve. The intermediate concentrated solution supply pipe 7 is
For example, by interposing an electromagnetic switching valve, it is controlled so as to communicate with the low-temperature regenerator during the cooling operation and to communicate with the high-temperature regenerator during the heating operation.

As described above, in the case of the present embodiment, first, the boiling gas-liquid from the high-temperature regenerator is introduced into the gas-liquid separation chamber formed by the first space 4a on the gas-liquid separator 1, and the refrigerant vapor The end of the insertion portion 6a of the pumping tube 6 that separates the liquid into an intermediate concentrated solution is curved, and the opening is made to face the partition plate 3, which is a part of the inner wall of the vessel 2, and the introduced diluted solution is introduced. After the solution collides with the partition plate 3, a swirling vortex is formed to efficiently separate gas and liquid.

Accordingly, the gas-liquid separation efficiency between the refrigerant vapor and the intermediate concentrated solution is improved, and the absorption performance is improved. In addition, there is no need for a collision plate or the like, which reduces the number of parts, simplifies the configuration and assembly, reduces the cost, and eliminates the scattering of the intermediate concentrated solution at the time of separation. Since the refrigerant vapor and the intermediate concentrated solution are surely stored separately in the upper and lower directions, the mixing of the intermediate concentrated solution into the refrigerant vapor as in the related art can be suppressed as much as possible.

As a result, the condensation in the condenser and the decrease in the evaporation capacity in the evaporator are prevented, and the corrosion of the apparatus and the system is prevented.

Further, in the present embodiment, a heating coil 24 for compensating for heat loss during the heating operation in winter is provided in parallel with the gas-liquid separator 1 thus made compact, Since the dilute solution receiver 16 having the function of controlling the amount of dilute solution supplied to the regenerator is integrated in the same container 2, the heat loss of the high-temperature refrigerant and the absorption liquid is reduced, and the absorption refrigeration is performed. The configuration of the entire device can be further reduced in size.

Next, FIG. 4 shows a configuration of an air-cooled absorption type refrigeration apparatus which employs such a gas-liquid separator having an integrated structure of a heater and a dilute solution receiver.

In the air-cooled absorption refrigerating apparatus shown in FIG. 4, for example, an aqueous solution of lithium bromide (aqueous solution of LiBr) is used as the absorbing liquid as described above, and steam is used as the refrigerant (the liquid to be absorbed). .

In FIG. 4, reference numeral 30 denotes a high-temperature regenerator, which includes a heating source 31 such as a gas burner. Above the high-temperature regenerator 30, a gas-liquid separator 1 communicated via a liquid pumping pipe 6 is provided. In the high-temperature regenerator 30, the lithium bromide dilute solution c is heated and boiled, and supplied to the gas-liquid separator 1 located above via the liquid pumping tube 6,
Here, separation and regeneration are performed into steam a and a lithium bromide intermediate concentrated solution (intermediate concentration absorbing solution) b.

The lithium bromide dilute solution c is obtained by absorbing water d as a refrigerant into a lithium bromide intermediate concentrated solution b as an absorbing liquid in an air-cooled absorber 32 described later. After being preheated through the high-temperature solution heat exchanger 34 and supplied to the dilute solution receiver 16 of the gas-liquid separator 1, it is returned to the high-temperature regenerator 30.

As described above, the gas-liquid separator 1 is connected to a heating refrigerant (for example, R407C) circulating in the secondary cycle X including the use side heat exchanger 43 on the outer peripheral side thereof. A heat coil 24 that exchanges heat with the subsequent steam a and serves as a heat source during a heating operation in winter is provided in parallel.
The steam a after heat exchange with the heating coil 24 is sent to the low temperature regenerator 35 and condensed condensed refrigerant liquid (that is, condensed water)
Is returned to the high temperature regenerator 30 together with the dilute solution. Further, the lithium bromide intermediate concentrated solution b separated in the gas-liquid separator 1 is cooled by the high-temperature solution heat exchanger 34.
After the heat exchange with the dilute lithium bromide solution c in the above, it is supplied to the low temperature regenerator 30, while it is returned to the high temperature regenerator 30 during heating. Reference numeral 36 denotes an exhaust gas passage for discharging exhaust gas.

In the low-temperature regenerator 35, during cooling, the steam a supplied from the gas-liquid separator 1 and the lithium bromide concentrated solution b are subjected to heat exchange to condense the steam a and concentrate the lithium bromide. The residual water contained in the solution b is evaporated to extract a lithium bromide solution having a higher concentration.

The steam a evaporated from the lithium bromide concentrated solution b in the low-temperature regenerator 35 is supplied to the air-cooled condenser 3.
The condensed water is sent to 7 and condensed and liquefied to become condensed water d and stored in the refrigerant tank 38. The condensed water d condensed and liquefied in the low-temperature regenerator 35 is also stored in the refrigerant tank 38.

The condensed water d stored in the refrigerant tank 38
Is supplied to the spraying device 41 of the evaporator 40 by the refrigerant pump 39. The concentrated lithium bromide solution b taken out of the low-temperature regenerator 35 exchanges heat with the dilute lithium bromide solution c in the low-temperature solution heat exchanger 33, and then is transferred to the absorption liquid distribution container 42 of the air-cooled absorber 32. Supplied. The evaporator 40 exchanges heat between the cooling refrigerant (for example, R407C) circulating in the secondary-side refrigerant cycle X including the use-side heat exchanger 43 and the condensed water d sent from the refrigerant tank 38. It becomes a cold heat source at the time.

The dilute lithium bromide solution c taken out of the air-cooled absorber 32 is passed through the low-temperature solution heat exchanger 33 and the high-temperature solution heat exchanger 34 by the solution pump 44 as described above. Is returned to.

The air-cooled absorber 32 includes a plurality of absorption heat transfer tubes 45 through which the absorption liquid b flows vertically.
Radiation fins 46, 46... Provided on the outer periphery of the absorption heat transfer tubes 45, 45.
Provided at the upper part of the heat transfer tubes 45, 45
And an absorption liquid distribution container 42 for distributing the absorption liquid b. The evaporator 40 and the spraying device 41 for supplying the refrigerant liquid d to the outer periphery of the evaporator heat transfer tubes 47, 47... In the evaporator 40 are built in the absorbing liquid distribution container 42. .

The evaporator 40 is provided with evaporative heat transfer tubes 47 through which the refrigerant circulating in the secondary cycle X including the use-side heat exchanger 43 flows as described above. The heat transfer tubes 47, 47,... Are arranged so as to form a horizontal multistage of six rows.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a gas-liquid separator part of an air-cooled absorption refrigeration apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a refrigeration system diagram showing an overall configuration of an air-cooled absorption refrigeration apparatus according to Embodiment 1 of the present invention.

FIG. 3 is a perspective view showing a configuration of a gas-liquid separator part of an air-cooled absorption refrigeration apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a refrigeration system diagram showing an overall configuration of an air-cooled absorption refrigeration apparatus according to Embodiment 2 of the present invention.

[Explanation of symbols]

1 is a gas-liquid separator, 2 is a separator body, 3 is a partition plate, 6 is a liquid pumping pipe, 6a is a tip, 7 is an intermediate concentrated solution supply pipe, 12 is a refrigerant vapor supply pipe, 50 is a vessel, 51 Is a communication port.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takumi Shimozen 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries Inside Kanaoka Plant of Sakai Seisakusho Co., Ltd. (72) Inventor Masato Utsumi 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries Stock Sakai Factory Kanaoka Factory

Claims (4)

[Claims] 1. A gas-liquid separator for separating a dilute solution in a gas-liquid two-phase state heated by a high-temperature regenerator into a refrigerant vapor and an intermediate concentrated solution, and heating the refrigerant vapor separated by the gas-liquid separator. And a dilute solution receiver having a liquid level control function of supplying the dilute solution after the completion of the absorption action to the high-temperature regenerator, and a gas-liquid separator is formed by the first cylindrical body at the center. The diluted solution receiver is constituted by a second cylindrical container provided at a predetermined interval on the outer peripheral side of the first cylindrical container, and the inside of the second cylindrical container is formed. The air-cooled absorption refrigeration apparatus according to claim 1, wherein a heater is provided for the first cylindrical body constituting the gas-liquid separator. 2. The first cylindrical container is provided with a partition plate interposed therebetween.
A gas-liquid separation means for colliding and separating a dilute solution in a gas-liquid two-phase state from the high-temperature regenerator into a refrigerant vapor and an intermediate concentrated solution; A gas-liquid storage chamber for storing the concentrated solution at two upper and lower positions, and a lower intermediate concentrated solution storage section of the gas-liquid storage chamber, wherein the intermediate concentrated solution is supplied to a low-temperature regenerator during cooling, and during heating. The intermediate concentrated solution supply pipes respectively supplying the high temperature regenerators are communicated with each other, and the upper refrigerant vapor storage section is openly communicated above the internal space of the second cylindrical body, while the second refrigerant vapor storage section is communicated with the second concentrated solution supply pipe. A dilute solution receiver chamber is formed in the cylindrical body, a refrigerant vapor supply pipe for supplying refrigerant vapor to the low-temperature regenerator during cooling at the upper part of the dilute solution receiver chamber, and an intermediate part from the absorber. A dilute solution supply pipe and a dilute solution supply pipe to the high temperature regenerator Air-cooled absorption type refrigerating apparatus according to claim 1, wherein the occupied passed,. 3. A gas-liquid separator for separating a dilute solution in a gas-liquid two-phase state heated by a high-temperature regenerator into a refrigerant vapor and an intermediate concentrated solution, and heating the refrigerant vapor separated by the gas-liquid separator. And a dilute solution receiver having a liquid level control function of supplying the dilute solution after the completion of the absorption action to the high-temperature regenerator, and the inside of a single cylindrical body is separated through a partition plate. Partitioning into two spaces, a first chamber and a second chamber, the first chamber constitutes a gas-liquid separator and the second chamber constitutes a dilute solution receiver, and the gas-liquid separator is formed inside the second chamber. An air-cooled absorption refrigeration system comprising a heater provided for a first chamber to be configured. 4. The first chamber is provided with gas-liquid separation means for separating a dilute solution in a gas-liquid two-phase state from a high-temperature regenerator into a refrigerant vapor and an intermediate concentrated solution, and separating the separated refrigerant vapor with the intermediate concentrated solution. A gas-liquid separation chamber for storing the intermediate concentrated solution at two upper and lower positions is provided, and a lower intermediate concentrated solution storage section of the gas-liquid separation chamber is provided with the intermediate concentrated solution to a low-temperature regenerator during cooling, and during heating. An intermediate concentrated solution supply pipe for supplying each of the high temperature regenerators is communicated, and the upper refrigerant vapor storage section is communicated above the second chamber side space portion, while the second chamber has a dilute solution receiver. A chamber is formed, a refrigerant vapor supply pipe for supplying refrigerant vapor to the low-temperature regenerator during cooling, a dilute solution supply pipe from the absorber in the middle, and a high temperature Make sure that the dilute solution supply pipes to the regenerator The air-cooled absorption refrigeration apparatus according to claim 3, characterized in that: