JPS58203362A - Absorption type refrigerator - 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 The present invention relates to an absorption refrigerator that uses a heat source with unstable heat input, such as solar heat or waste heat, as a heating source for a solution, and in which the refrigerator itself has a heat storage function. .

・Solar heat is easily affected by weather fluctuations, the angle of incidence of sunlight, wind speed, etc., and the heat input to the refrigerator is unstable. Furthermore, the exhaust heat contained in the exhaust gas of the prime mover also varies depending on the operating conditions of the side that discharges it.

Conventionally, in absorption refrigerators that utilize such unstable heat sources as heating sources, a heat storage tank has been installed separately.

Therefore, the conventional technology has the disadvantage that the equipment becomes large and the equipment cost increases.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art and provide an absorption refrigerator having a heat storage function in the refrigerator itself.

A feature of the present invention is that the cooling water pipe that passes cooling water through the absorber and into the condenser is provided with a cooling water bypass that can directly bypass the cooling water to the condenser when there is heat input and no load. The above objective was reliably achieved by continuing to operate during temporary no-load conditions despite heat input, and by increasing the concentration of the solution so that heat could be stored. .

Hereinafter, the present invention will be explained based on the drawings.

The figure shows an embodiment of the absorption refrigerator of the present invention, which includes a solar heat collector 1, a regenerator 3, a condenser 5, an evaporator 7, an absorber 9, a solution circulation pump 13, a heat exchanger 14, It is configured to include a cooling water bypass 15.

A heating medium pipe 2 for circulating hot water as a heating medium is connected to the heat collector 1, and the heating medium pipe 2 is inserted into a regenerator 3.

The regenerator 3 heats the dilute solution with hot water flowing in the 7111 heat medium pipe 2, and transfers the refrigerant vapor generated by forcefully heating the dilute solution to the condenser 5 through the refrigerant vapor pipe 4.
Send it to.

A cooling water pipe 10 is introduced into the condenser 5 . In this condenser 5, the cooling water flows through a cooling water pipe 10 and is sent to an evaporator 7. (The evaporator 7 is
A cold water pipe 8 for circulating cold water is provided. This evaporator 7
Then, the refrigerant liquid cools the cold water flowing inside the cold water pipe 8,
The latent heat of vaporization is removed from the cold water and the refrigerant vapor flows into the absorber 9.

The absorber 9 is equipped with a spray pipe (not shown) and a cooling water pipe 10. Still, the absorber 9 is connected to the regenerator 3 via a solution supply pipe 11 and a solution return pipe 12. In the absorber 9, the refrigerant vapor is absorbed by the concentrated solution fed from the regenerator 3 through the solution return pipe 12 and sprayed from the spray header, and the dilute solution that has absorbed this refrigerant vapor is transferred to the solution supply pipe 11. The regenerator 3 is supplied through the regenerator 3.

The solution circulation pump 13 is provided at the bottom side of the absorber 9, pumps out the dilute solution produced in the absorber 9, and sends the dilute solution to the regenerator 3 through the solution supply pipe 11.

The heat exchanger 14 includes a solution supply pipe 11 and a solution return pipe 12.
The dilute solution flowing from the absorber 9 to the regenerator 3 and the concentrated solution flowing from the regenerator 3 to the absorber 9 exchange heat.

The cooling water pipe path 15 includes a cooling water bypass pipe 16 connected between the absorber inlet side pipe 10a and the condenser inlet side pipe 10b of the cooling water pipe 10, and the absorber inlet side pipe 10a.
the first valve 17 provided in the cooling water bypass pipe 16;
The second valve 18 provided in the condenser 5 is configured to allow cooling water to be bypassed directly to the condenser 5 when there is heat input and there is no load.

During steady operation, the absorption chiller of the embodiment opens the first valve 17 of the cooling water bypass 15 and closes the second valve 18 when there is a large heat input or a load. Depending on the driving, it works as follows.

That is, hot water heated by collecting solar heat in the heat collector 1 is sent to the regenerator 3 through the heating medium pipe 2. On the other hand, the dilute solution is sent from the absorber 9 to the regenerator 3 through the solution circulation pump 13 and the solution supply pipe 11.

Then, the dilute solution is heated with hot water in the regenerator 3, the refrigerant becomes vapor, the refrigerant vapor is sent to the condenser 5 through the refrigerant vapor pipe 4, and the concentrated solution with the refrigerant evaporated is passed through the solution return pipe 12. Returned to the absorber 9, the dilute solution and concentrated solution exchange heat in a heat exchanger 14.

In the condenser 5, the refrigerant vapor is cooled and condensed by the cooling water passed through the cooling water pipe 10, and the refrigerant liquid flows into the evaporator 7 through the refrigerant return pipe 6 and is recovered.

Cold water is circulated through the evaporator 7 through a cold water pipe 8,
In the evaporator 7, the refrigerant liquid absorbs the latent heat of the cold water flowing in the cold water pipe 8 and evaporates, thereby cooling the cold water and exerting its refrigerating ability. The refrigerant gas generated in the evaporator 7 then flows to the absorber 9.

Cooling water is passed through the absorber 9 through a cooling water pipe 10, and the refrigerant gas is absorbed into the concentrated solution while the temperature is lowered by the cooling water. The saturation pressure of the solution in this absorber 9 decreases as the temperature of the cooling water decreases, and as the concentration of the solution increases, the absorption capacity increases.

Next, when there is heat input but there is no load temporarily, the operation of the refrigerator is conventionally stopped, but in the embodiment of the present invention, the operation is performed as follows.

That is, the first valve 17 of the cooling water bypass 15 is closed, the second valve 18 is opened, and the cooling water is bypassed directly to the condenser 5 through the cooling water bypass pipe 16 and the cooling water condenser inlet side pipe 10b. , the solution circulation pump 13 continues to operate with no refrigerating capacity.

As a result, the solution will continue to be concentrated, and heat input will be accumulated by increasing the concentration of the solution.

As a result, when the next load is applied, the concentrated solution is supplied to the absorber 9 even if there is no heat input, so that by passing cooling water through the cooling water pipe 10 into the absorber 9 again, the heat can be stored. Freezing capacity for 30 minutes can be obtained.

Although the drawing shows an example of using solar heat as a heating source for the solution, absorption refrigeration using waste heat can also be achieved by using a waste heat storage device instead of a solar heat collector. It can also be applied to machines.

The present invention has the above-described configuration 1, and when there is no heat input and no load, the cooling water is directly bypassed to the condenser through the dynamic water bypass, and operation is continued. Since heat can be stored by increasing the concentration of the solution, and the refrigerator itself has a heat storage function, it not only has the effect of significantly downsizing the entire equipment, but also has the effect of significantly reducing equipment costs.

[Brief explanation of the drawing]

The figure is a system diagram showing an embodiment of an absorption refrigerator according to the present invention. DESCRIPTION OF SYMBOLS 1... Heat collector, 2... Heating medium pipe, 3... Regenerator, 4... Refrigerant vapor pipe, 5... Condenser, 6... Refrigerant return pipe, 7...・Evaporator, 8... Cold water pipe, 9... Absorber, 10... Cooling water pipe, 10a... Absorber inlet side piping, 10b... Condenser inlet side piping, 11... Solution Supply pipe, 12... Solution return pipe, 13... Solution circulation pump, 14... Heat exchanger, 15... Entire cooling water bypass, 16... Cooling water bypass pipe, 17... First valve, 18... second valve.

Claims (1)

[Claims] In a device that connects an evaporator, absorber, condenser, regenerator, solution circulation pump, heat exchanger, etc. with piping, and uses solar heat, waste heat, etc. as a heating source for the solution in the regenerator, the absorber An absorption chiller characterized in that a cooling water pipe through which cooling water is inserted into a condenser is provided with a cooling water bypass mechanism that allows cooling water to bypass directly to the condenser when there is no load and there is no heat input. .