JPS58195762A - Absorption heat pump - 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 improvement in an absorption heat pump that raises the temperature of a fluid to be heated, such as hot water, by utilizing heat radiation on the heat radiation side of an absorption refrigeration cycle, that is, in an absorber and a condenser.

This type of absorption heat pump has the advantage of efficiently raising the temperature of the heated fluid, but is limited by the temperature of the heated fluid that is taken out depending on the temperature conditions of the heat source fluid flowing to the evaporator. If the temperature drops below the rated value, not only will the heated fluid not reach the specified temperature, but conversely, heat will be radiated from the absorber side to the evaporator side, preventing normal operation. For example, when river water is used, there is a problem that the heat source fluid freezes and the operation has to be stopped.

In view of the above, the present invention provides a system in which when the temperature of the heat source fluid becomes lower than the rated value, that is, the set temperature, the concentrated absorption liquid (hereinafter referred to as concentrated liquid) is removed from the fluid extraction pipe housed in the absorber. By circulating the absorption liquid in a manner similar to that of the heat source fluid, and by detecting the temperature at which the heated thermal fluid is taken out and adjusting the amount of heating to the generator, the temperature of the heat source fluid can be adjusted to a specified level regardless of the temperature conditions of the heat source fluid. The purpose is to stably extract heated fluid at a certain temperature.

Embodiments of the present invention will be described below with reference to the drawings.

(1) is a generator that is equipped with a combustion burner (2) and heats and separates the refrigerant from the diluted absorption liquid (hereinafter referred to as tank liquid) and regenerates it into a concentrated liquid; (3) is a generator that a separator that separates concentrated liquid and refrigerant vapor; (4) a condenser that cools and condenses the refrigerant vapor from the separator (3) with the heated fluid in the fluid extraction pipe (5) stored in the container; (6) is the condenser (4
) The heat source tube (7) houses the condensed refrigerant liquid flowing down from the
), the evaporator (8) is the separator (3).
The absorber (9) is a solution heat exchanger and the concentrated liquid is sprayed onto a fluid take-out pipe (5) housed in the vessel and cooled by the heated fluid in the cough pipe, while the concentrated liquid absorbs the vaporized refrigerant. These are connected by the liquid pumping pipes, the concentrated liquid pipe (b), the replenishing liquid pipe (2) with the solution pump (2), the refrigerant vapor pipe (b), and the refrigerant liquid down pipe (g) to absorb the refrigerant. It forms a circulation path with the liquid.

(G) is the fluid extraction tube (
5), concentrate liquid “Q) @ liquid heat exchanger (9)
The concentrated liquid pipe (b) on the outlet side and the absorption liquid reservoir inside the absorber (8)
b) A bypass pipe connected to the upper vessel wall, and the bypass pipe is equipped with an on-off valve. The concentrated liquid pipe (b) is also equipped with an on-off valve (6). In addition, these on-off valves (to)
(Instead of 1'J, a three-way valve (not shown) may be provided at the connection between the concentrated liquid pipe (b) and the bypass pipe (vertical).

■ is the heat source tube (7) on the inlet side or outlet side of the evaporator (6)
A temperature sensor is installed in the
Switch the opening/closing of 8(6). Further, Qυ is a temperature detector provided in the fluid take-out pipe (5) on the outlet side of the condenser (4) for the fluid to be heated, and the combustion amount of the burner (2) is controlled by the signal from this detector.

Therefore, the temperature of the heat source fluid detected by the temperature detector (E) is higher than the set temperature (in some cases, the temperature of the heat source fluid detected by the temperature detector (E) is higher than the set temperature).
is closed, and the on-off valve (6) is opened to form a circulation path for the refrigerant and absorption liquid, and the absorber (8) and condenser (4) are operated.
The temperature of the fluid to be heated is increased by the heat dissipation action of the burner (2), and when the temperature of the fluid to be heated as detected by the temperature sensor becomes lower than the rated value, the combustion amount of the burner (2) is increased and the generator (1) is heated. The temperature of the heated fluid is adjusted to reach the rated value by increasing the heme heating amount and increasing the temperature and flow rate of the refrigerant vapor flowing into the condenser (4) by 1:.1°.

Next, when the temperature of the heat source fluid detected by the temperature detector (e) becomes lower than the set temperature, the on-off valve
The on-off valve (6) is opened, the on-off valve (6) is closed, the concentrated liquid is passed through the bypass pipe (G), the circulation of the absorption liquid is switched, and the heated fluid is raised by the heat dissipation action of the condenser (4). Warm up. In addition, when the temperature of the heated fluid detected by the temperature detector @l) becomes below the rated value, the combustion amount of the burner (2) is increased and adjusted so as to reach the rated value.

In this way, the fluid to be heated at a predetermined temperature can be stably taken out regardless of the temperature conditions of the heat source fluid.

Note that the set temperature of the heat source fluid is appropriately selected based on design specification values such as the capacity of the absorption heat pump. The temperature sensor (
When 1) is provided on the inlet side of the evaporator (6), the set temperature is selected higher than when the temperature detector (e) is provided on the outlet side of the evaporator (6). The former case has the advantage of being able to directly detect the temperature of the supplied heat source fluid, and the latter case has the advantage of being able to detect the risk of freezing of the heat source fluid during operation of the heat pump.

As described above, the present invention forms a bypass path in which the concentrated liquid bypasses the fluid extraction pipe stored in the absorber, and when the heat source fluid flowing through the heat source pipe stored in the evaporator becomes lower than the set temperature. This is an absorption heat pump that is equipped with a mechanism that switches the circulation of the absorption liquid by passing it through a concentrated liquid bypass path, and a mechanism that detects the temperature of the heated fluid at the condenser outlet side and adjusts the amount of heating to the generator. In other words, it is a simple version of a conventional absorption heat pump with a simple switching mechanism for absorption liquid circulation, regardless of the temperature conditions of the heat source fluid.
It is possible to stably take out the fluid to be heated at a predetermined temperature; this is useful in practice.

It's a turnaround.

(1)... Generator, (2)... Burner, (4)... Condenser, (5)... Fluid extraction pipe, (6 )...Evaporator, (7)...
... Heat source tube, (8) ... Absorber, (9)
...Solution heat exchanger, 0υ...Concentrated liquid pipe, (G)...Bypass pipe, (G) (1'J...
・, open/close valve, stop...Temperature detector Applicant: Sanyo Electric Co., Ltd. and 1 other person

Claims (1)

[Claims] (1) Connect the generator, condenser, evaporator, absorber, and liqueur heat exchanger with piping to form a circulation path for the refrigerant and absorption liquid, and use the heated liquid in the liquid extraction pipe housed in the absorber and condenser. In an absorption heat pump that raises the temperature of a fluid, the concentrated absorption liquid from the generator forms a bypass path that bypasses the fluid extraction pipe stored in the absorber, and the heat source fluid flowing through the heat source pipe stored in the evaporator reaches the set temperature. Equipped with a mechanism that switches the circulation of the absorbed liquid by passing the concentrated absorption liquid through a bypass path when the following occurs, and a mechanism that detects the temperature of the heated fluid at the condenser outlet side and adjusts the amount of heating to the generator. An absorption heat pump characterized by: