JP3089533B2 - Absorption chiller / heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption chiller / heater provided with an absorber and an evaporator having a tray installed in the upper part thereof.
In particular, the present invention relates to an absorption chiller / heater suitable for stabilizing the refrigerating capacity by holding and fixing the horizontal level of the absorber tray and the evaporator tray.

[0002]

2. Description of the Related Art In a conventional absorption chiller / heater, FIGS.
As shown in FIG. 12, a high-temperature regenerator 1 for heating a dilute solution
A separator 2 that separates the dilute solution into a refrigerant vapor and an intermediate concentrated solution, a high-temperature solution heat exchanger 3 that exchanges heat between the intermediate concentrated solution and the dilute solution and lowers the temperature, A low-temperature regenerator 6 for heating again to obtain a concentrated solution, a low-temperature solution heat exchanger 4 for exchanging heat of the concentrated solution with a dilute solution, and a condenser 7 for condensing refrigerant vapor into a liquid refrigerant; Evaporator 8 which has a built-in tray 8a and evaporates by dropping liquid refrigerant from the evaporator tray 8a, and a concentrated solution from the low-temperature solution heat exchanger 4 which has an absorber tray 9a provided above and which has an absorber tray 9a. And a solution circulation pump 5 connected to the absorber 9 to circulate the dilute solution, comprising: an absorber 9 for absorbing the refrigerant vapor evaporated by the evaporator 8 to generate a dilute solution; The evaporator 8 and the absorber 9 are housed in one container 11 via a common partition 10. Evaporator tray 8a and the fixed plate 8i which substantially horizontally supports the absorber tray 9a, provided 9i,
One end of each fixed plate 8i, 9i is engaged with the common partition 10 by welding w or the like, and each fixed plate 8i, 9i is engaged.
The upper part of i is engaged with the tray fixing plates 8h, 9h of the evaporator tray 8a and the absorber tray 9a by welding w or the like.

[0003] Above the evaporator 8 and the absorber 9, an evaporator tray 8a for dropping liquid refrigerant and an absorber tray 9a for dropping a concentrated solution are mounted. These evaporator tray 8a and absorber tray are provided. 9a is formed in a U-shaped box shape with an open upper surface, and has a large number of holes formed in the bottom surface, and a concentrated solution or liquid refrigerant flowing from the upper surface is stored at a predetermined height. Thereafter, the liquid column pressure causes the droplets to be almost uniformly dropped and sprayed onto the coils 8b, 9b of the evaporator 8 or the absorber 9 via a large number of holes. If the evaporator tray 8a and the absorber tray 9a are not kept substantially horizontal, the height of the liquid level in each tray will be uneven, and the dripping amounts will be uneven, greatly affecting the refrigerating capacity.

[0004] One end of the evaporator tray 8a and one end of the absorber tray 9a are fixed to the common partition 10 and the lower end is fixed to the fixing plate 8.
i, 9i and floating in the cell space of the absorber 8 and the evaporator 9, the evaporator tray 8a
Also, the other end of the absorber tray 9a is slightly lowered due to the weight of the coils 8b, 9b, and the evaporator tray 8a and the absorber tray 9a are similarly lowered, so that the horizontality is changed and the evaporation is changed. The heights of the liquid levels in the container tray 8a and the absorber tray 9a become uneven, the dripping amounts become uneven, and the refrigerating capacity becomes unstable.

[0005]

In the conventional absorption chiller / heater, the horizontal accuracy of the evaporator tray and the absorber tray is reduced by the weight of the coil, and the amount of dripping of the concentrated solution or liquid refrigerant becomes uneven. As a result, the refrigeration capacity becomes unstable.

SUMMARY OF THE INVENTION An object of the present invention is to provide an absorption chiller / heater capable of preventing a decrease in horizontal accuracy of an evaporator tray and an absorber tray and stabilizing a refrigerating capacity.

[0007]

In order to achieve the above object, an absorption chiller / heater according to the present invention separates a dilute solution into a refrigerant vapor and an intermediate concentrated solution by heating a dilute solution. A separator, a high-temperature solution heat exchanger that heat-exchanges the intermediate concentrated solution with a dilute solution, lowers the temperature, a low-temperature regenerator that reheats the cooled intermediate concentrated solution with refrigerant vapor to obtain a concentrated solution, A low-temperature solution heat exchanger that exchanges heat with a low-temperature solution heat exchanger, a condenser that condenses the refrigerant vapor into a liquid refrigerant, an evaporator that has an evaporator tray installed in the upper part, and a liquid refrigerant is dropped from the evaporator tray and evaporated. , An absorber tray is provided in the upper part, and a concentrated solution from the low-temperature solution heat exchanger is dropped from the absorber tray, and an absorber that absorbs the refrigerant vapor evaporated by the evaporator to generate a dilute solution is provided. In a chiller / heater, one evaporator and one absorber are connected via a common partition. A tray fixing plate housed in a container and holding at least one of the evaporator tray and the absorber tray substantially horizontally is provided, and one end of each tray fixing plate is fixed to a common partition, and each tray fixing plate is fixed. At least one of the evaporator coil and the absorber coil is separated from the coil fixing plate.

[0008]

According to the present invention, the tray fixing plates of the evaporator tray and the absorber tray are separated from the coil fixing plate and supported by the common partition of the container so that the weight of the evaporator coil or the absorber coil is not applied. As a result, the horizontal accuracy of the absorber tray and the evaporator tray is improved, the liquid level in the evaporator tray and the absorber tray becomes uniform, and the liquid refrigerant or the concentrated solution is dropped onto the evaporator or the absorber. The amount becomes uniform and the refrigerating capacity becomes stable.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 5, a high-temperature regenerator 1 for heating a dilute solution, a separator 2 for separating the dilute solution into a refrigerant vapor and an intermediate concentrated solution, and heat exchange of the intermediate concentrated solution with the dilute solution A high-temperature solution heat exchanger 3 for lowering the temperature, a low-temperature regenerator 6 for reheating the cooled intermediate concentrated solution with refrigerant vapor to obtain a concentrated solution,
A low-temperature solution heat exchanger 4 for heat-exchanging the concentrated solution with a dilute solution and lowering the temperature; a condenser 7 for condensing refrigerant vapor into a liquid refrigerant;
The evaporator 8 is provided with an evaporator tray 8a at the upper part, and a liquid refrigerant is dropped from the evaporator tray 8a to evaporate. The evaporator 8 is provided with an absorber tray 9a at the upper part. Absorber 9 comprising an absorber 9 for dropping a concentrated solution and absorbing a refrigerant vapor evaporated in an evaporator 8 to generate a dilute solution, and a solution circulation pump 5 connected to the absorber 9 for sucking the dilute solution. A water machine, a tray for holding an evaporator 8 and an absorber 9 in one container 11 via a common partition 10 and holding at least one of an evaporator tray 8a and an absorber tray 9a substantially horizontally. Fixing plates 8d and 9d are provided,
At least one end of each of the tray fixing plates 8d and 9d is fixed to the common partition 10 by welding w or the like, and each tray fixing plate is fixed to at least one of the evaporator coil 8b and the absorber coil 9b. It is configured to be arranged apart from the fixing plates 8e, 9e.

As shown in FIGS. 6 and 7, an evaporator tray 8a for dropping the liquid refrigerant and an absorber tray 9a for dropping the concentrated solution are mounted above the evaporator 8 and the absorber 9. The evaporator tray 8a and the absorber tray 9a have a U-shaped box-shaped cross section with an open upper surface, are formed in an annular shape, and have a large number of holes formed in the bottom surface. After the liquid refrigerant or concentrated solution flowing from the upper surface is stored at a predetermined height, the liquid column pressure causes the annular coils 8 of the evaporator 8 and the absorber 9 to pass through a number of holes.
b and 9b are almost uniformly dropped and sprayed. The evaporator tray 8a and the absorber tray 9a are inserted through a plurality of tray fixing plates 8c, 9c provided in the radial direction and fixed in the circumferential direction, and the lower surface is supported by the upper end surfaces of the tray fixing plates 8d, 9d. The lower ends of the tray fixing plates 8c and 9c are fixed to the upper portions of the tray fixing plates 8d and 9d by welding w or the like. Also, tray fixing plates 8d, 9d
Are separated from the coil fixing plates 8e, 9e in the longitudinal direction of the coils 8b, 9b, and the upper end surfaces of the coil fixing plates 8e, 9e are separated from the lower surfaces of the evaporator tray 8a and the absorber tray 9a. The spacers 8f and 9f are provided in the vertical direction at a predetermined pitch so as to sandwich the coils 8b and 9b in a plurality of rows in the vertical direction.

The common partition 10 is provided substantially concentrically with the container 11 so as to partition the evaporator 8 and the absorber 9, and fixes one end of the tray fixing plates 8c and 9c. Then, the tray fixing plates 8d, 9d to which the lower ends of the tray fixing plates 8c, 9c are fixed are separated from the coil fixing plates 8e, 9e,
A gap a is opened from the bottom surfaces of the evaporator tray 8a and the absorber tray 9a on the upper end surfaces of the coil fixing plates 8e and 9e. Due to the gap a, the other ends of the tray fixing plates 8c and 9c
b, 9b, the tray 8a,
9a is kept horizontal, and the liquid levels in the trays 8a, 9a are constantly maintained.

According to this embodiment, at least one of the evaporator tray and the absorber tray is held substantially horizontally without being affected by the weight of the evaporator coil or the absorber coil. Or, the liquid surface of the liquid refrigerant or concentrated solution stored in the absorber tray becomes almost horizontal, the liquid column pressures to many holes on the bottom surface become equal, and the liquid refrigerant or concentrated solution is almost uniformly discharged from any hole. Began to drip,
As a result of being uniformly spread on the coil, the liquid film thickness on the coil becomes equal and the refrigerating capacity is stabilized.

[0013]

According to the present invention, since the evaporator tray or the absorber tray is prevented from being distorted due to the weight of the evaporator coil or the absorber coil and is held almost horizontally, the amount of the liquid refrigerant or the concentrated solution dropped is reduced. Instability of the refrigeration capacity due to unevenness of the refrigeration is prevented, and the refrigeration capacity is stabilized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of the evaporator of FIG.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a sectional view showing a main part of the absorber of FIG.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a cross-sectional view of the container of FIG.

FIG. 7 is a perspective view of FIG. 6;

FIG. 8 is a diagram showing a conventional technique.

FIG. 9 is a sectional view showing the evaporator of FIG. 8;

FIG. 10 is a side view of FIG. 9;

FIG. 11 is a sectional view showing the absorber of FIG. 8;

FIG. 12 is a side view of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High temperature regenerator 2 Separator 3 High temperature solution heat exchanger 4 Low temperature solution heat exchanger 5 Solution circulation pump 6 Low temperature regenerator 7 Condenser 8 Evaporator 8a Evaporator tray 8b Evaporator coil 8c Tray fixing plate 8d Tray fixing plate 8e Coil fixing plate 9 Absorber 9a Absorber tray 9b Absorber coil 9c Tray fixing plate 9d Tray fixing plate 9e Coil fixing plate 10 Common partition 11 Container

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 15/00 F25B 37/00 F25B 39/02

Claims (1)

(57) [Claims] 1. A high-temperature regenerator for heating a dilute solution, a separator for separating the dilute solution into refrigerant vapor and an intermediate concentrated solution, and a high-temperature solution for lowering the temperature by exchanging the intermediate concentrated solution with the dilute solution. A heat exchanger, a low-temperature regenerator that reheats the cooled intermediate concentrated solution with the refrigerant vapor to obtain a concentrated solution, a low-temperature solution heat exchanger that exchanges heat with the dilute solution to lower the temperature, and A condenser for condensing the refrigerant vapor into a liquid refrigerant; an evaporator for evaporating the liquid refrigerant from the evaporator tray by evaporating the liquid refrigerant from the evaporator tray; and an absorbing tray for evaporating the liquid refrigerant from the evaporator tray to the upper part. An absorber for dropping the concentrated solution from the low-temperature solution heat exchanger from the container tray and absorbing a refrigerant vapor evaporated by the evaporator to generate a dilute solution, wherein the evaporator comprises: And the absorber are housed in one container via a common partition, A tray fixing plate that holds at least one of the evaporator tray and the absorber tray substantially horizontally is provided, one end of each tray fixing plate is fixed to the common partition, and each tray fixing plate is attached to the evaporator. An absorption chiller / heater characterized by being arranged apart from a coil fixing plate of at least one of a coil and an absorber coil.