JPH0518637A - Absorption refrigerating machine - Google Patents

Abstract

PURPOSE:To provide an absorption refrigerating machine which improves the spread of a refrigerant in an evaporator. CONSTITUTION:In an absorption type freezer comprising an absorber 7, a reproducer 1, a condenser 13, and an evaporator 15, a refrigerant flowing out from absorber 7 is guided to a refrigerant spread pipe 19 located in a manner to be adhered to the topmost part of an evaporation pipe 15a of the evaporator 15. A refrigerant injected through a fine hole 20 formed in the upper wall of the refrigerant spread pipe 19 is received by a flying preventing plate 21 installed thereabove, and thereafter the refrigerant is dripped. The injected refrigerant received by the flying preventing plate 21 to return it is diffused in the axial direction of the refrigerant spread pipe 19 to spread it over an outer surface, and the whole surface of an evaporation pipe 15a group adhered therebelow is sufficiently wet therewith.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerating machine for home use or having a capacity in the vicinity thereof.

[0002]

2. Description of the Related Art In this type of absorption refrigerating machine which has been used conventionally, a method of spraying the refrigerant is to use a method of spraying the refrigerant by various spraying devices and dropping it onto an evaporation pipe (Jitsuko Sho 59-). 32847 publication). For example, a configuration in which the refrigerant liquid flowing down from the perforations at regular intervals (coarse pitches) pierced at the bottom of the refrigerant liquid storage tray is dropped directly onto the parallel peripheral surfaces of the paired fin tubes (evaporation tubes). Has become.

[0003]

However, in such a pipe which receives the dripping directly from the distribution device in the uppermost pipe of the evaporation pipe, since the dripping position of the refrigerant is determined, its surface can be sufficiently wetted. Therefore, the surface area of the heat transfer tube cannot be effectively used.

In view of the above situation, it is an object of the present invention to provide an absorption refrigerating machine in which the uppermost evaporating pipe is sufficiently wetted with a refrigerant so that its heat transfer surface area is effectively utilized.

[0005]

The present invention provides an absorption refrigerating machine comprising an absorber, a regenerator, a condenser and an evaporator.
In this evaporator, a refrigerant spray pipe arranged above the vertically stacked evaporation pipes for ejecting the refrigerant derived from the absorber from the pores of the upper wall, and the ejected refrigerant in the downward direction A shatterproof plate is provided.

[0006]

As described above, the refrigerant vapor obtained by heating in the regenerator is cooled in the condenser and becomes the refrigerant liquid and is sent to the evaporator. The refrigerant sent into the evaporator enters the refrigerant distribution pipe and is ejected through the fine holes (upward fine holes) formed in the upper wall.
Therefore, the refrigerant spray is ejected upward and hits the anti-scattering plate located above, and the ejected refrigerant is diffused in the axial direction of the refrigerant spray pipe and then always flows back to the refrigerant spray pipe.
Therefore, the refrigerant is further diffused by being dispersed on the outer surface of the refrigerant distribution pipe, the wetting is increased as the refrigerant flows down the outer circumference, and the refrigerant is transmitted to a wide area of the lower evaporator.

[0007]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 3 shows a refrigeration cycle system diagram for a small capacity air-cooled or water-air-cooled water-lithium salt absorption refrigerating machine for home use, and 1 is a regenerator equipped with a combustion device 2 such as a burner. A solution heat exchanger 6 is connected to a concentrated solution pipe 3 derived from the vessel 1 via a concentrated solution valve 4 and an orifice 5 arranged in parallel, and a tip of a pipe passing through the solution heat exchanger 6 is connected to an absorber 7. It is connected to a concentrated solution distributor 8 arranged at the top. A solution tank 11 is connected to the tip of a dilute solution pipe 9 led out from the lower end of the absorber 7. On the other hand, a condenser 13 is connected to the tip of a pipe 12 for guiding the refrigerant vapor generated in the regenerator 1, and the tip of a pipe 14 for guiding the refrigerant liquid cooled by the condenser 13 is formed in the lower part of the evaporator 15. The refrigerant liquid connected to the tank 16 and the refrigerant liquid accumulated in the refrigerant tank 16 is installed in close contact with the uppermost stage of the evaporation pipe 15a of the evaporator 15 through the pipe 18 from the refrigerant circulation pump 17 provided at the lower end thereof. It is supposed to be led to 19. In this case, the ejection holes 20 formed in the refrigerant spray pipe 19 are arranged at a predetermined interval on the upper wall (upper surface) of the pipe. Further, at a position directly above the pores 20, a scattering prevention plate 21 having a downward U-shaped cross section with a downward U-shaped width smaller than at least the diameter of the refrigerant distribution pipe 19 to guide the refrigerant downward.
Is provided. Reference numeral 22 is a cold water inlet pipe facing between the evaporation pipes 15a of the evaporator 15, and 23 is a cold water outlet pipe for discharging the cooled water. The tip of the refrigerant vapor pipe 24 provided at the upper end of the evaporator 15 is connected to the upper portion of the absorber 7. Reference numeral 25 is a pipe for returning the dilute solution drawn from the solution tank 11 to the regenerator 1, and the pipe 25 is a circulation circuit for returning from the solution circulation pump 26, the dilute solution valve 27 to the solution heat exchanger 6 to the regenerator 1. Make up. Reference numeral 28 denotes a cooling water tank for storing the cooling water that has cooled the absorber 7 and the condenser 13, and the cooling water tank 28 includes a cooling water pump 29 to a cooling water pipe 3
The cooling water spraying device 31 is connected via 0. Reference numeral 32 denotes a cooling fan that cools the absorber 7 and the condenser 13, and the entire configuration thereof constitutes an absorption refrigerator.

[0008] Next, this operation will be described. The dilute solution, which has become diluted by absorbing the refrigerant in the regenerator 1, is heated by the combustion device 2 and boils to generate a concentrated solution and a refrigerant vapor. This concentrated solution is distributed from the concentrated solution pipe line 3 through the concentrated solution valve 4 and the orifice 5 in parallel through the solution heat exchanger 6, and is further distributed by the concentrated solution distributor 8 into the heat transfer tube of the absorber 7. It The concentrated solution in the absorber 7 absorbs the refrigerant vapor evaporated in the evaporator 15 to become a dilute solution, which is a solution tank 1 that is a dilute solution reservoir.
Enter 1. The dilute solution returns to the regenerator 1 again through the solution circulation pump 26, the dilute solution valve 27, and the solution heat exchanger 6 in the dilute solution line 25.

On the other hand, the refrigerant evaporates in the regenerator 1, passes through the pipe 12, is cooled in the condenser 13 and is liquefied to become a refrigerant liquid. This refrigerant liquid is the refrigerant tank 1 which is a refrigerant liquid reservoir from the pipe 14.
Enter 6. The refrigerant liquid in the refrigerant tank 17 is sent from the lower refrigerant circulation pump 17 through the pipe 18 to the refrigerant dispersal device 19, is ejected from the pores 20 of the pipe, and is a scattering prevention plate 21.
And is dispersed on the heat transfer tubes of the evaporator 15. In this case, as shown in FIGS. 1 and 2, the pores 2 of the refrigerant distribution pipe 21 are
The ejected refrigerant ejected from 0 is a downward U-shaped scattering prevention plate 21.
As a result, the refrigerant spray pipe 19 is diffused in the axial direction and sprayed on the outer surface. The refrigerant a may easily spread on the outer surface of the refrigerant distribution pipe 19, so that the entire lower end of the refrigerant distribution pipe 19 gets wet. This refrigerant a is dispersed as it is in the evaporation pipe 15a of the evaporator 15 in the lower stage, and sufficient wetting can be secured from the uppermost stage of the evaporation pipe 15a, which is efficient.

The refrigerant liquid evaporates on the evaporation pipe 15a, cools the cold water entering from the cold water inlet pipe 22, and sends it out from the cold water outlet pipe 23. This cold water is used for indoor cooling. The refrigerant vapor evaporated in the evaporator 15 enters the absorber 7 through the pipe 24 and is absorbed by the concentrated solution.

The absorber 7 and the condenser 13 are cooled by air cooling or water cooling. For example, in the case of air-cooled type,
The absorber 7 and the condenser 13 are cooled by the cooling fan 32. In the case of the water-air cooling system, a fan 32 is used and a cooling water pump 29 in a cooling water tank 28 sprays cooling water from a cooling water spraying device 31 to an absorber 7 or a condenser 13 through a cooling water pipe 30 for cooling. Is.

[0012]

As described above, in the absorption refrigerating machine of the present invention, the device for spraying the refrigerant to the evaporation pipe (heat transfer pipe) in the evaporator is arranged on the upper part of the evaporator which is vertically closely attached. Refrigerant spray pipe with pores for jetting the refrigerant on the wall and a splash prevention plate that guides the jetted refrigerant downward spreads the refrigerant jetted from the pores and spreads over the refrigerant spray pipe. Since it is dropped while it is flowing, it can flow down over the entire surface of the evaporation tube group that is in close contact with the lower portion of the refrigerant distribution tube to ensure sufficient wetting, and the refrigerant vapor can be efficiently generated.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a refrigerant flow in an evaporator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a refrigeration cycle system diagram of an absorption refrigerator.

[Explanation of symbols]

 1 Regenerator 7 Absorber 13 Condenser 15 Evaporator 15a Evaporating pipe 19 Refrigerant spraying pipe 20 Pore 21 Scattering prevention plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Arinaga 2-220 Kosugicho, Nakahara-ku, Kawasaki-shi, Kanagawa Togyo Gas Dormitory (72) Inventor Susai, 2-18, Keihanhondori, Moriguchi-shi, Osaka Sanyo Denki Incorporated (72) Inventor Katsuyuki Tsuno 2-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. An absorption refrigerator comprising an absorber, a regenerator, a condenser, and an evaporator, wherein the evaporator is disposed above an evaporation pipe which is vertically stacked. A refrigerant distribution pipe for ejecting the refrigerant derived from the absorber from the pores of the upper wall,
An absorption refrigerating machine provided with a shatterproof plate that guides the jetted refrigerant downward.