JPH0731097Y2 - Air-cooled absorption refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an air-cooled absorption refrigerating machine for air-cooling an absorber and a condenser.

<Prior art> As an air cooling technology for a conventional air-cooled absorption refrigerator, Japanese Patent Laid-Open No.
58-208559 is known.

This system adopts a configuration in which an air blowing fan a is provided in the upper part of the device, and an absorber b and a condenser c are vertically arranged and arranged on the left and right of the fan. Further, generally, the intervals l of the laterally projecting cooling fins f in the flow-down pipe parts that become the air-cooling heat exchanger parts d and e of the absorber and the condenser are made equal (see FIG. 3).

<Problems to be solved by the invention> However, in such a type in which the cold air is sucked and flowed right above from the lateral direction, the flow velocity of the wind is inevitably high in the portion close to the fan, and it is far from the fan. The wind speed becomes slower in the lower part. Therefore, the performance is significantly different between the upper part and the lower part of the heat exchanger part.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an air-cooled absorption refrigerating machine in which fins of the air-cooling heat exchanger section are partially different so as to obtain uniform heat exchange.

<Means for Solving the Problems> The present invention is directed to an air-cooled absorption refrigerator having a cooling fan in the middle upper part of a vertical air heat exchanger section-equipped absorber and a condenser with air heat exchanger section, which face each other. The fin pitch of each air heat exchanger part close to the cooling fan is made dense, and the fin pitch of the part distant from the cooling fan is roughly set.

<Operation> Due to the above-mentioned configuration, when the absorption fan is operated, if the cooling fan arranged at the upper part of the equipment rotates, the negative pressure generated at the back of the absorption fan causes the vertical direction of the absorber and the condenser facing each other. From each of the air heat exchanger parts, the air is guided with a bent flow of a right-angled bend, and heat is exchanged in the air heat exchanger part by the passage of this wind. In this case, the fin group protruding from the air heat exchanger part has a denser part near the cooling fan to slightly slow down the air flow rate, and a lower part far from the cooling fan to roughen the air flow rate to increase the air flow rate as a whole in the vertical direction. A uniform flow velocity is obtained.

<Embodiment> Hereinafter, the present invention will be described with reference to the drawings of an embodiment.

Reference numeral 1 denotes an absorber with a flow-down tube type air heat exchanger portion 4 in which a vertical fin 3 having an evaporator 2 disposed above is projecting, and a condenser 5 is provided at a position spaced apart from the absorber 1 by a predetermined distance. The cooling fin 7 is provided on the upper part of the condenser 5, and the low temperature regenerator 7 is provided on the upper end of the downward flow tube type air heat exchanger section 6
A cooling fan 8 is attached to an upper intermediate portion between the low temperature regenerator 7 and the evaporator 2, and a high temperature regenerator 9 is provided below the absorber 1 and the condenser 5 below, a burner 10 for heating the high temperature regenerator 9 and a high temperature heat exchanger. 11, a low temperature heat exchanger 12, an absorbing liquid pump 13 and the like are provided, and a pumping pipe 14 from the high temperature regenerator 9 is exposed to the low temperature regenerator 7 via the high temperature heat exchanger 11 to form a condenser. The refrigerant pipe 15 from 5 is led to the evaporator 2, and the dilute liquid pipe 16 from the absorber 1 is connected to the high temperature regenerator 9 via the pump 13, the low temperature heat exchanger 12 and the high temperature heat exchanger 11, and a predetermined refrigeration cycle To form a double-effect air-cooled absorption type refrigerator 17 as a whole. In this case, the density (pitch) of the fins 3 protruding from the air heat exchanger parts 4, 6 is set so that the upper position on the upper side of the cooling fan 8 is dense and the lower side of the cooling fan 8 is separated. Is coarse.

Next, this operation will be described. First, the refrigerant vapor generated in the high temperature regenerator 9 is guided to the low temperature regenerator 7, where it is reheated and liquefied in the refrigerant vapor condenser 5, and the refrigerant liquid is evaporated.
And the refrigerant is evaporated to cause a refrigerating effect, and the absorber 1 absorbs the refrigerant vapor to maintain the refrigerating capacity.

In this case, the cooling fan 8 arranged at the upper part of the device is rotated to pass the cool air through the air heat exchanger part 4 of the absorber 1 and the air heat exchanger part 6 of the condenser 5, and the air heat exchanger part 4, 6. Air heat exchange shall be performed.

Here, the pitch of the cooling fins 3 projecting on the outer periphery of the vertical air heat exchanger parts 4 and 6 is set to the upper cooling fan 8
Since the portion close to is dense and the portion far is rough, the flow velocity of air that can occur in the portion close to the cooling fan 8 becomes slower,
The flow velocity of the air in the distant portion becomes fast, the flow velocity becomes uniform over the entire vertical width, and even in the upper and lower portions of the air heat exchanger units 4 and 6, average performance can be obtained.

<Effect of the Invention> As described above, in the air-cooled absorption refrigerator of the present invention, the fins of the air heat exchanger are arranged with a dense pitch in the portion close to the cooling fan and a coarse pitch in the portion far from the cooling fan. With this pitch, the average performance can be obtained over the upper and lower parts of the air heat exchanger part, and overall the heat transfer performance of the heat exchanger part is improved and the fan power etc. is also reduced. Therefore, there is an effect that energy-saving operation becomes possible.

[Brief description of drawings]

FIG. 1 is a configuration diagram of the present invention, FIG. 2 is an explanatory diagram of the air heat exchanger portion, and FIG. 3 is an explanatory diagram of a conventional product. 1 ... Absorber, 2 ... Evaporator, 3 ... Fin, 4 ... Air heat exchanger part, 5 ... Condenser, 6 ... Air heat exchanger part,
7: Low temperature regenerator, 8: Cooling fan.

Front page continuation (72) Yuito Kobayashi, 2-18 Keihan Hon-dori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Ikume Yonezo, 2--18, Keihan Hon-dori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (72) Inventor Takao Tanaka 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56) Reference JP-A-58-208559 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. An air-cooled absorption refrigerating machine having a cooling fan in the upper middle part between a vertical absorber having an air heat exchanger section and a condenser having an air heat exchanger section facing each other. An air-cooled absorption refrigerating machine with a finer fin pitch in the vessel and a coarser fin pitch away from the cooling fan.