JPS5851577Y2 - Double effect absorption chiller - Google Patents

Description

[Detailed description of the invention] The present invention relates to a dual-effect absorption refrigerator configured so that a part of the dilute solution discharged from the solution pump is guided to a low temperature generator and the remaining part to a high temperature generator. be.

An example of a conventional refrigerator of this type is shown in FIG.
It is equipped with an evaporator E, a high temperature heat exchanger XH1, a low temperature heat exchanger XL, a solution pump SP, and a refrigerant pump RP.

Among the solution paths connecting these, pipe 1 is used for the high temperature solution path that goes back and forth between the absorber A and the high temperature generator GH.
, 2, 3, 4, 5, 6.7 are provided, and pipes 1, 2.8, 9, 10, 11.7 are provided for the low temperature solution path that reciprocates between the absorber A and the low temperature generator GL. is provided.

Among these pipes, pipes 1, 2.7 are common to the same route.

12 is a branch point, 13 is a confluence point, and the dilute solution discharged from the solution pump SP is branched at the branch point 1.2, a part of which is led to the high temperature generator GH via the flow control valve VH, and the remainder is is led to the low temperature generator GL via a flow control valve VL.

For refrigerant paths, pipes 14.15, 16, 17.1
8 and a heating tube 19 are provided.

Reference numerals 20 and 21 are cooling water pipes, and 22 is a heating pipe through which steam and the like are guided, and the amount of heating is controlled by a flow rate control valve VSH.

Reference numeral 23 denotes a cold water pipe, and a temperature detector 24 that detects the temperature of the cold water at its outlet detects the cold water load and operates the flow rate control valve VSH to control the amount of heating.

25 is a float that detects the solution level in the high temperature generator GH, and the signal is used to operate the flow rate control valve VH provided on the outbound path of the high temperature solution path.

Further, a detection signal of the cold water outlet temperature of the hot electrode detector 24 is used to operate a flow control valve VL provided in the low temperature solution path leading to the low temperature generator GL.

In such a structure, since the refrigerant is water and vacuum tightness is important, bellows seal valves are usually used for the flow control valves VH and VL.

However, bellows seal valves are not only expensive, but also have drawbacks such as the bellows seal portion being easily damaged and having a short lifespan.

Moreover, in a dual-effect absorption refrigerator having two solution paths, a low-temperature solution path and a high-temperature solution path, in order to increase efficiency at partial load, VH is required.

Two flow control valves called VL were essential.

The present invention eliminates the above disadvantages by controlling the speed of the solution pump using a physical quantity that changes in response to changes in the chilled water load, and improves efficiency without using an expensive and easily damaged bellows seal valve. The object of the present invention is to provide a dual-effect absorption refrigerator that is flexible and highly reliable.

This invention includes absorbers, high temperature generators, low temperature generators, condensers,
It has an evaporator, a solution pump, a refrigerant pump, and a solution path and a refrigerant path that connect these devices, and a part of the solution sent from the solution pump is led to the low temperature generator, and the remaining part is led to the high temperature generator. The dual-effect absorption chiller configured as above is characterized by comprising a rotation speed control mechanism that changes the rotation speed of the solution pump using a physical quantity that changes in response to a change in chilled water load as an operation signal. This is a heavy-effect absorption refrigerator.

The present invention will be explained with reference to the drawings based on examples.

In FIG. 2, the same reference numerals as in FIG. 1 have the same names and functions.

In this embodiment, instead of the flow rate control valves VH and VL, a rotation speed control mechanism 26 of the solution pump SP is provided,
The rotational speed of the solution pump SP is controlled in response to a signal from the float 25, thereby controlling the flow rate.

Instead of the signal from the float 25, the pressure and temperature of the high temperature generator GH, the saturation temperature or condensation temperature of the refrigerant generated in the high temperature generator GH, etc. are detected as physical quantities that change in response to changes in the chilled water load. It may be operated by the signal.

FIG. 3 shows another embodiment in which the concentrated solution from the high temperature generator GH is led by line 6 to the low temperature generator GL.

Since the embodiment described above is configured in this way, the flow control valves VH and VL can be omitted.

This invention includes absorbers, high temperature generators, low temperature generators, condensers,
It has an evaporator, a solution pump, a refrigerant pump, and a solution path and a refrigerant path that connect these devices, and a part of the solution sent from the solution pump is led to the low temperature generator, and the remaining part is led to the high temperature generator. In the dual-effect absorption refrigerating machine configured as described above, a bellows seal valve It is possible to omit flow control valves with complicated structures such as
We are able to provide a dual-effect absorption chiller that has fewer breakdowns, is highly reliable, can adjust the power of the solution pump even under partial loads, and can save energy, making it extremely practical. This has great effects.

[Brief explanation of drawings]

FIG. 1 is a flowchart of a conventional example, and FIGS. 2 and 3 are flowcharts of different embodiments of the present invention. A...Absorber, GH...High temperature generator,
GL...Low temperature generator, C...Condenser,
E: Evaporator, XH: High temperature heat exchanger, XL: Low temperature heat exchanger, SP: Solution pump, RP:・Refrigerant pump, VSH...
...Flow rate control valve, VH...Flow rate control valve, VL
...Flow rate control valve, 1, 2° 3.4, 5, 6, 7
, 8, 9, 10. 11... pipe line, 12...
... Branching point, 13... Confluence point, 14.15.1
6.17.18...Pipe line, 19...Heating pipe, 20...Cooling water pipe, 21...Cooling water pipe, 22...・Heating pipe, 23...Cold water pipe, 24...Temperature detector, 25...
Float, 26... Rotation speed control mechanism.

Claims (1)

[Scope of utility model registration request] 1. It has an absorber, a high temperature generator, a low temperature generator, a condenser, an evaporator, a solution pump, a refrigerant pump, and a solution path and a refrigerant path that connect these devices, and a part of the solution sent from the solution pump is In a dual-effect absorption refrigerator configured such that the remaining portion is guided to a low-temperature generator and the remainder to the high-temperature generator, the rotation speed of the solution pump is changed using a physical quantity that changes in response to a change in chilled water load as an operation signal. A dual-effect absorption refrigerator characterized by being equipped with a rotation speed control mechanism. 2. The physical quantity that changes in response to the change in the chilled water load is
The dual-effect absorption refrigerator according to claim 1, wherein the liquid level height of the high-temperature generator is registered as a utility model. 3. The physical quantity that changes in response to the change in the chilled water load is
The dual-effect absorption refrigerator according to claim 1, wherein the temperature of the solution of the high temperature generator is the temperature of the solution. 4. The physical quantity that changes in response to the change in the chilled water load is
The dual-effect absorption refrigerator according to claim 1, wherein the refrigerant pressure of the high-temperature generator is the refrigerant pressure of the high-temperature generator. 5. The physical quantity that changes in response to the change in the chilled water load is
A dual-effect absorption refrigerator according to claim 1 of the utility model registration claim, which has a cold water temperature. 6. The physical quantity that changes in response to the change in the chilled water load is
A dual-effect absorption refrigerator according to claim 1, which is a temperature difference between the cold water inlet and outlet.