JPS5852463Y2 - Water-lithium salt compact absorption refrigerator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a water-lithium salt type small-sized absorption refrigerator using a multi-tubular liquid pumping tube.

In a water-lithium salt type small absorption refrigerator, if the heat source of the regenerator is a heat medium such as relatively low-temperature hot water obtained from solar heat or steam, the regenerator is equipped with a multi-tube liquid pump. With this structure, a heating medium is passed through the outside of the regenerator, and a part of the refrigerant condensed in the condenser is returned to the lower part of the liquid pumping pipe and boiled, thereby improving the transfer between the solution in the regenerator and the heating medium. It is known to increase the thermal coefficient and the amount of solution circulation, which in turn increases the amount of heating medium and the stability against temperature changes and low temperature heating medium.

However, in conventional refrigerators of this type, the amount of refrigerant returned to the lower part of the liquid pumping pipe was only regulated by an orifice installed in the pipe, so it was not possible to control it in a manner appropriate to the operating conditions of the refrigerator, making it inefficient. Ta.

In addition, it was extremely difficult to start operation using a low-temperature heat medium.

The present invention eliminates these conventional drawbacks and is an improved small-sized water-lithium salt absorption refrigeration system that can operate stably using a relatively low-temperature heating medium and lowers the heating medium temperature at the start of operation. This was done for the purpose of providing an opportunity.

An embodiment of the present invention will be described in detail below with reference to the drawings.

In the figure, 1 is a regenerator having a plurality of liquid pumping pipes 1a, 2
3 is a separator that separates the refrigerant vapor obtained by heating in the regenerator 1 from the absorption solution; 3 is a condenser having a condenser coil 3a that condenses the refrigerant vapor separated in the separator 2; and 4 is a condenser. In the evaporator for evaporating the liquid refrigerant obtained in step 3, the liquid refrigerant is spread over the evaporator coil 4a, absorbs heat from the water flowing inside the coil 4a, and evaporates.

Therefore, the water flowing through the evaporator coil 4a is cooled, and the room can be cooled by appropriately guiding this cold water to a fan coil unit (not shown) in the room.

Reference numeral 5 denotes an absorber that absorbs the refrigerant vapor evaporated in the evaporator 4 into an absorption solution. Ru.

Note that cooling water flows through the coil 5a to remove absorbed heat.

Then, the absorber 5 absorbs the refrigerant and the absorption solution becomes a dilute solution, which is sent to the lower part of the liquid pumping pipe 1a of the regenerator 1 via the heat exchanger 6.

Reference numeral 7 denotes a refrigerant receiver with a predetermined area provided at the bottom of the condenser 3. A predetermined amount of condensed refrigerant enters the relay box 8 via the refrigerant receiver 7, and further passes through the refrigerant pipe 9 to the pump of the regenerator 1. liquid tube 1
It is designed to return to the lower part of a.

Reference numeral 10 denotes a refrigerant storage chamber, one end of which is connected to the intermediate portion of a pipe line 11 for sending refrigerant from the condenser 3 to the evaporator 4, and the other end connected to the relay box 8 by a pipe 12.

This refrigerant storage chamber 10 is provided with a coil 10a through which cooling water is passed.

Note that 13 is a heat medium inlet of the regenerator 1.

By the way, in the past, an orifice was provided in the pipe line for returning the refrigerant from the condenser 3 to the regenerator 1 to regulate the amount of refrigerant, but in the present invention, as described above, the refrigerant receiver 7 of a predetermined area is connected to the condenser. 3, a predetermined proportion of the condensed refrigerant is always returned to the regenerator 1 via the relay box 8, allowing the refrigerator to operate stably even with a relatively low temperature heat medium. becomes possible.

In other words, when the amount of generated steam decreases due to the low temperature of the heat medium introduced into the regenerator 1, the amount of refrigerant returned to the regenerator 1 is reduced accordingly to maintain operational efficiency. It is.

Furthermore, a refrigerant storage chamber 10 is provided and connected to the relay box 8, so that when the operation of the refrigerator is stopped, the refrigerant in the refrigerant storage chamber 10 is regenerated from the pipe 11 via the relay box 7 and the refrigerant pipe 9. It will be mixed into the solution in vessel 1 to dilute the solution.

Therefore, when the refrigerator starts operating, it is possible to operate it even with a low-temperature heat medium.

Note that since cooling water is passed through the coil 10a in the refrigerant storage chamber 10, the pressure in the condenser 3 is high during normal operation, and the refrigerant in the refrigerant storage chamber 10 does not flow out to the relay box 8.

As described above, according to the present invention, a predetermined proportion of the condensed refrigerant is always returned to the regenerator to enable stable operation using a relatively low-temperature heat medium, and also to enable stable operation at the start of operation. A small-sized water-lithium salt absorption refrigerator that can use a low-temperature heating medium can be provided, and its practical effects are great.

It goes without saying that the present invention is not limited to the one embodiment described above, and can be implemented with various modifications without departing from the scope of the invention.

[Brief explanation of drawings]

The figure is a system diagram showing an embodiment of a water-lithium salt type small-sized absorption refrigerator according to the present invention. 1...Regenerator, 1a... Lifting pipe, 2.
... Separator, 3 ... Condenser, 4 ...
... Evaporator, 5 ... Absorber, 7 ... Refrigerant receiver, 8 ... Relay box, 9 ... Refrigerant pipe, 10 ...・・Refrigerant storage room, 10a・・・・
··coil.

Claims (1)

[Scope of utility model registration request] a regenerator having a multi-pipe liquid lift pipe; a separator that separates refrigerant vapor obtained by heating in the regenerator from an absorption solution;
A condenser that condenses the refrigerant vapor sent from this separator, an evaporator that vaporizes the liquid refrigerant obtained in this condenser by removing heat from other fluids through heat exchange, and refrigerant vapor generated in this evaporator. and an absorber for absorbing the refrigerant into the absorption solution separated by the separator, and a refrigerant pipe for returning a part of the refrigerant condensed in the condenser to the lower part of the liquid pumping pipe. In the water-lithium salt type small absorption refrigerating machine, a receiver having a predetermined area provided at the bottom of the condenser is provided in order to smoothly return a fixed amount of the refrigerant condensed in the condenser to the bottom of the pumping pipe of the regenerator. a refrigerant receiver having a section and connected to the refrigerant pipe, and storing refrigerant having one end connected to an intermediate part of a pipe connecting the condenser and the evaporator and the other end connected to the refrigerant pipe. A water-lithium salt type small-sized absorption refrigerator characterized by comprising a refrigerant storage chamber and a coil provided in the refrigerant storage chamber and through which cooling water is passed.