JPS60144574A - Diluting device for absorption cold and hot water machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dilution device for a dual-effect absorption chiller/heater with a low temperature regenerator.

Structure of a conventional example and its problems FIG. 1 shows a dilution device for a conventional absorption chiller/heater. Reference numeral 1 designates a low-temperature regenerator, which includes a refrigerant vapor pipe 2 having a heat exchange section 2b in an absorption liquid 4 for exchanging heat with the refrigerant generated in the high-temperature regenerator.

Absorbing liquid 4 heated by refrigerant vapor 3 generates refrigerant vapor 6, which becomes condensed refrigerant 7 in condenser e.

26-T On the other hand, the refrigerant vapor 3 is cooled in the low temperature regenerator 1 and enters the condenser 6 as a condensed refrigerant. The condensed refrigerant 7 is connected to refrigerant pipes 8 and 9
．． The refrigerant enters the evaporator 13 through the refrigerant pump 14 and is distributed to the cold water pipes 15 by the refrigerant pump 14 .

At this time, the amount of refrigerant circulation is changed by opening and closing control valves 11 and 12 provided in the refrigerant pipes 9 and 1o, depending on the cooling load. That is, by opening the control valve 11 or 12, a large amount of the condensed refrigerant 7 in the condenser θ is allowed to flow into the evaporator 13, so that the condensed refrigerant 7 flows from the overflow portion 16 in the evaporator 13 into the absorber 17. , change the absorbent concentration. Further, the absorbent liquid 4 which has been concentrated by generating refrigerant vapor 6 in the low temperature regenerator 1 exits the low temperature regenerator 1, passes through a heat exchanger, is led to the absorber 17, and is sprayed from the water sprinkler pipe 171L. The absorption liquid 4 that has absorbed vapor in the absorber 17 is circulated into the machine by an absorption liquid pump 18. The control valve 2o provided in the bypass pipe 19 of the evaporator 13 and the absorber 17 is opened when the operation is stopped, and has the function of sending the condensed refrigerant liquid in the evaporator 13 to the absorber 17 to lower the absorption liquid concentration.

3.

In the conventional example above, in order to dilute when the operation is stopped,
By flowing the refrigerant stored in the condenser 6 into the evaporator 13 during operation, the refrigerant can overflow from the overflow part 16 of the evaporator 13 and be guided to the absorber 17, or the refrigerant stored in the evaporator 13 can be The refrigerant was introduced into the absorber 17 through the bypass pipe 19 and circulated within the machine by the absorption liquid pump 1B, thereby diluting the absorption liquid inside the machine.

Therefore, when the operation is stopped, it is necessary to dilute the absorption liquid for a certain period of time using the absorption liquid pump 18, and if there is a power outage during operation, the absorption liquid pump 18 is stopped, so the concentration of the absorption liquid in the absorber 17 decreases. It was not possible to dilute the absorption liquid inside the aircraft as it remained
In particular, an absorber dispersion solution that is highly concentrated and tends to crystallize in order to increase the absorption capacity of the absorber has the disadvantage of being particularly prone to crystallization.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention shortens the dilution operation time, and even when the absorption liquid pump is not operating due to a power outage, etc., the dilution can be carried out by utilizing the pressure difference between the components of the absorption water cooler/heater in operation. The purpose is to

Structure of the Invention In order to achieve this object, the present invention provides a system between a pipe through which condensed refrigerant is passed after the refrigerant vapor generated in the high-temperature regenerator has exchanged heat with the absorption liquid in the low-temperature regenerator, and the absorption liquid part of the low-temperature regenerator. It consists of a bypass pipe with an on-off valve and a bypass pipe with an on-off valve.This allows the high-pressure, high-temperature condensed refrigerant to be transferred to the low-pressure absorption liquid in the low-pressure regenerator by creating a pressure difference when the operation is stopped or during a power outage. It is used to dilute the part of the absorption liquid that is most likely to crystallize.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The same members as in the conventional example will be described using the same symbols. In FIG. 2, a bypass pipe 22 is connected between the outlet 2a of the heat exchanger 2b, which exchanges heat between the refrigerant vapor generated in the high-temperature regenerator and the absorption liquid 4, and the low-temperature regenerator 1.
23 is a control valve provided in the bypass pipe 21, and 23 is a control valve provided at the bottom of the condenser 6 and the bar 5-. ．． ．． .

This is a pipe connected to the path pipe 210 and the control valve 22.

To explain the operation in the above configuration, during operation of the absorption chiller/heater, the pressure of the condensed refrigerant at the outlet 2a of the refrigerant vapor pipe 2 is approximately 700 mmHg (absolute pressure, the same applies hereinafter), and the temperature is 96°.
C, and the pressure of the absorption liquid 4 in the low-temperature regenerator 1 is eomi
Hg and the temperature is 96°C, when the operation is stopped or a power outage occurs during operation, by opening the control valve 22, the high pressure condensed refrigerant flows into the low temperature regenerator 1 through the bypass pipe 21 due to the pressure difference, and the low temperature The absorbent liquid 4 in the regenerator 1 is diluted.

The diluted absorption liquid 4 flows into the absorber 17 due to the pressure difference and head difference, but when the pressure of the condensed refrigerant at the outlet 1a of the low temperature regenerator 1 of the refrigerant vapor pipe 3 becomes low, the condensed refrigerant 7 in the condenser 6 also flows into the absorber 17. It has the effect of flowing through the bypass pipe 21 to the low temperature regenerator 1 and further into the absorber 17 to continue dilution. The other operations are the same as those of the conventional example described above, and will therefore be omitted.

Effects of the Invention As described above, in the Inazawa equipment of the present invention, when the operation is stopped, 6 bases =
In the event of a power outage or a power outage during operation, the pressure difference inside the machine is used to dilute the absorption liquid sprayed part that is most likely to crystallize. be.

[Brief explanation of the drawing]

FIG. 1 is a piping circuit diagram of a conventional absorption chiller/heater, and FIG. 2 is a piping circuit diagram of an absorption chiller/heater showing an embodiment of the present invention. 1... Low temperature regenerator, 2°°°°°° refrigerant vapor pipe/6°゛°°°゛ condenser, 17... Absorber, 2
1... Bypass pipe, 22... Control valve. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A low-power regenerator equipped with a heat exchanger in which refrigerant vapor generated in the high-temperature regenerator exchanges heat with an absorption liquid, and a connection between the outlet of the heat exchanger in the low-temperature regenerator and the absorption liquid part of the low-temperature regenerator. connect between
A dilution device for an absorption chiller/heater, which is equipped with a bypass pipe having an on-off valve.