JPH04295560A - Absorption refrigerator - Google Patents

Abstract

PURPOSE:To provide an absorption refrigerator of a small capacity for domestic use or the like in which refrigerant blow is automatic. CONSTITUTION:An absorption refrigerator is provided with a solution tank 12 to reservoir diluted solution which is led out of an absorber 23 and a refrigerant tank 7 to reservoir refrigerant in a vaporizer 6. In a dilution tube running from the refrigerant tank 7 to the solution tank 12, a refrigerant circulation pump 10 and a dilution valve 11 are provided, so that a refrigerant blow signal operates the refrigerant circulation pump 10 and opens the dilution valve 11. Further, a controller 17 is arranged to stop the refrigerant circulation pump 10 and close the dilution valve 11, if a height of refrigerant level in the refrigerant tank 8 drops down below a set value, whereby refrigerant blow is carried out automatically.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a small-capacity absorption refrigerating machine for domestic or nearby use.

0002

2. Description of the Related Art A conventional absorption refrigerator comprising an absorber, regenerator, condenser, evaporator, etc. is disclosed in, for example, Japanese Utility Model Publication No. 57-47667. In the case of absorption type refrigerators currently on the market, a manual valve is provided, and when refrigerant blowing is required, the manual valve is opened and closed when the blowing is completed.

0003

[Problems to be Solved by the Invention] However, although this idea is to be performed manually as part of a service, service-free service must be considered for small-capacity home use.

In view of the above circumstances, the present invention operates a refrigerant circulation pump and a dilution valve based on a refrigerant blow signal (an external operation signal or a detection signal from a concentration meter, etc.) and a refrigerant liquid level detection signal. The purpose is to provide an absorption chiller that solves these problems.

[0005]

[Means for Solving the Problems] The present invention provides an absorption refrigerator comprising an absorber, a regenerator, a condenser, and an evaporator.
a solution tank that stores the dilute solution derived from the absorber;
It has a refrigerant tank that stores the refrigerant in the evaporator, and a dilution pipeline from the refrigerant tank to the solution tank is provided with a refrigerant circulation pump and a dilution valve, and the refrigerant circulation pump is operated and diluted by a refrigerant blow signal. The controller is equipped with a controller that opens the valve and stops the refrigerant circulation pump and closes the dilution valve when the height of the refrigerant liquid level in the refrigerant tank falls below a set value.

[0006]

[Operation] Due to the above configuration, the refrigerant circulation pump is operated by the refrigerant blow signal, and at the same time the dilution valve is opened to start blowing refrigerant to the solution tank, and the lowest point l of the float sensor of the refrigerant tank, which becomes the refrigerant reservoir, is Upon detection, the refrigerant circulation pump is stopped, the dilution valve is also closed, and blowing ends automatically.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on drawings of embodiments.

FIG. 1 is a refrigeration cycle system diagram relating to a small-capacity water-lithium salt absorption refrigerating machine for household use, in which the absorber and condenser have an air-cooled or water-air-cooled structure.
1 is a regenerator with a combustion device 2 disposed at the bottom;
A condenser 3 that guides refrigerant vapor is connected to the evaporator 6 through a pipe 4, and the tip of the refrigerant liquid pipe 5 connected to the lower part of the condenser 3 is connected to the evaporator 6.
It is connected to a refrigerant tank 7 which serves as a refrigerant reservoir located at the bottom of the refrigerant tank. A float sensor 8 serving as a liquid level detector is provided inside the refrigerant tank 7 to detect the lowest liquid level l. In addition, the piping 9 to the evaporator 6 is equipped with a refrigerant circulation pump 10 and a dilution valve 11 on its outlet side, and has a bypass path leading to a solution tank 12. A solution heat exchanger 16 is connected via a solution circulation pump 14 and a dilute solution valve 15, and the tip thereof is used as a pipe returning to the regenerator 1. A controller 17 connects the float sensor 8, the refrigerant circulation pump 10, and the dilution valve 11. 18 is a regenerator float sensor provided on the side of the regenerator 1.

Next, to explain this effect, first, the regenerator 1
The diluted solution that absorbs the refrigerant is transferred to the combustion device 2.
When heated, it boils and produces a concentrated solution and refrigerant vapor. This concentrated solution passes through the concentrated solution piping 19 and the concentrated solution valve 20 and orifice 21 arranged in parallel in the same piping to the solution heat exchanger 1.
Enter 6. Further, the concentrated solution is distributed through the concentrated solution pipe 19 into the heat exchanger tube of the absorber 23 by the concentrated solution distribution device 22 . In this absorber 23, the concentrated solution is evaporated in the evaporator 6, and the pipe 24 is evaporated.
It absorbs the refrigerant vapor introduced through the refrigerant, becomes a dilute solution, and enters the solution tank 12, which is a dilute solution reservoir, through the pipe 25. The dilute solution returns to the regenerator 1 again through the dilute solution piping 13, a solution circulation pump 14, a dilute solution valve 15, and a solution heat exchanger 16 installed in the middle.

On the other hand, the refrigerant is evaporated in the regenerator 1, passes through the pipe 4, is cooled in the condenser 3, and is liquefied to become a refrigerant liquid. The refrigerant liquid enters a refrigerant tank 7 which is a refrigerant liquid reservoir through a pipe 5. The refrigerant liquid in the refrigerant tank 7 passes through the pipe 9 and is distributed onto the heat transfer tubes of the evaporator 6 from the refrigerant distribution device 26 by the refrigerant circulation pump 10 . The refrigerant liquid evaporates on this heat transfer tube, cooling the cold water coming in from the cold water inlet pipe 27 and passing it through the cold water outlet pipe 28.
Send it out. This cold water is used for indoor air conditioning. The evaporated refrigerant vapor enters the absorber 23 through the pipe 24 and is absorbed.

[0011] The absorber 23 and the condenser 3 are cooled by air cooling or water/air cooling. Absorber 2 by cooling fan 29
3. Cool the condenser 3. In the case of the water-air cooling system, the cooling water in the cooling water tank 30 is sprayed 9 through the cooling water piping 32 by the cooling water pump 31 to the absorber 23 or the condenser 3 from the cooling water distribution device 33 for cooling.

Here, the controller 17 is actuated by a refrigerant blow signal (an external operation signal or a signal from a concentration meter, etc.), and the refrigerant circulation pump 10 is operated.At the same time, the dilution valve 11 is operated.
opens and starts blowing refrigerant into the solution tank 12. This refrigerant blow lowers the refrigerant liquid level in the refrigerant tank 7, and when the height of the refrigerant liquid level reaches the lowest level l, this is detected by the float sensor 8, and the refrigerant circulation pump 10 is stopped by a signal from the controller 17. The dilution valve 11 is also closed, and the refrigerant blowing ends automatically.

[0013]

[Effects of the Invention] As described above, the absorption chiller of the present invention operates the refrigerant circulation pump and opens the dilution valve according to the refrigerant blow signal, and when the height of the refrigerant liquid level in the refrigerant tank falls below a set value. Since the refrigerant circulation pump is stopped and the dilution valve is closed, the refrigerant can be blown automatically and safely, and the refrigerant circulation pump can be prevented from being damaged due to idle operation.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

[Explanation of symbols]

1 Regenerator 3 Condenser 6 Evaporator 7 Refrigerant tank 8 Float sensor 10 Refrigerant circulation pump 11 Dilution valve 12 Solution tank 17 Controller 23 Absorber

Claims (1)

[Claims] Claim 1: An absorption refrigerator comprising an absorber, a regenerator, a condenser, and an evaporator, comprising: a solution tank for storing a dilute solution derived from the absorber; and a refrigerant tank for storing refrigerant in the evaporator. and a refrigerant circulation pump and a dilution valve are provided in the dilution pipe line leading from the refrigerant tank to the solution tank,
The controller includes a controller that operates a refrigerant circulation pump and opens a dilution valve in response to a refrigerant blow signal, and stops the refrigerant circulation pump and closes the dilution valve when the height of the refrigerant liquid level in the refrigerant tank falls below a set value. An absorption chiller characterized by: