JPH04347464A - Absorption type heat pump device - Google Patents

Abstract

PURPOSE:To prevent a crystallization of absorption liquid by a method wherein a regenerator is disposed at a lower position than that of an evaporator, a diluting refrigerant transporting pipe for supplying refrigerant liquid within the evaporator is disposed and an opening or closing valve opened at an emergency stopping is disposed in the midway part of the diluting refrigerant liquid transporting pipe. CONSTITUTION:In the case that a device is stopped in emergency due to power interruption during an operation of an absorption cycle, an electromagnetic opening or closing valve 23 is closed and at the same time remaining electromagnetic opening or closing valves 24, 26 are opened, refrigerant liquid within the evaporator 1 and the condensor 4 is flowed into a regenerator 3 through the first and second diluting refrigerant liquid transporting pipes 17, 18. Accordingly, since a concentration of absorption liquid within the regenerator 3 is reduced, a crystallization of the absorption liquid is prevented. As the refrigerant liquid flows into the regenerator 3, phenomena such as a vapor explosion or a water hammering and the like may occur. However, the phenomena are restricted by arranging many injection holes formed in blowing pipes 17a, 18a for the refrigerant liquid disposed in the regenerator 3 and blowing the refrigerant liquid uniformly within the regenerator 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption heat pump device, and more particularly to an absorption heat pump device that can prevent crystallization of an absorption liquid when the device is stopped.

0002

[Prior Art] Conventionally, an absorption liquid consisting of a mixture of an alkali metal and a nitrate/water is used in an absorption heat pump device, and this absorption heat pump device also evaporates the refrigerant (water). an evaporator; an absorber that absorbs refrigerant vapor evaporated by the evaporator into an absorption liquid;
A regenerator for separating refrigerant vapor by heating the diluted absorption liquid that absorbs refrigerant in this absorber, a condenser for condensing the refrigerant vapor separated by this regenerator, and an evaporator. a refrigerant vapor transfer pipe for transferring refrigerant vapor in the absorber to the absorber;
A dilute absorption liquid transfer pipe that transfers the dilute absorption liquid in the absorber to the regenerator, a refrigerant vapor transfer pipe that transfers the refrigerant vapor separated in the regenerator to the condenser, and a refrigerant liquid condensed in the condenser that evaporates. It consisted of a refrigerant liquid transfer pipe that transfers the refrigerant liquid to the absorber, and a concentrated absorption liquid transfer pipe that transfers the concentrated absorbent liquid that has been regenerated in the regenerator to the absorber.

0003

[Problems to be Solved by the Invention] According to the above-mentioned conventional configuration, when the solution pump or the heating device of the regenerator is stopped due to a power outage, for example, metal salt compounds dissolved in the absorption liquid crystallize, causing the equipment to malfunction. There was a problem that restarting was difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an absorption heat pump device that can solve the above problems.

[0005]

[Means for Solving the Problems] In order to solve the above problems, a first means of the present invention includes an evaporator that evaporates a refrigerant;
an absorber that absorbs the refrigerant vapor evaporated by this evaporator into an absorption liquid; and a regenerator that absorbs the refrigerant in this absorber and heats the diluted absorption liquid to separate the refrigerant vapor. , a condenser that condenses the refrigerant vapor separated by this regenerator, a refrigerant vapor transfer pipe that transfers the refrigerant vapor in the evaporator to the absorber, and a rare absorber that transfers the dilute absorption liquid in the absorber to the regenerator. A liquid transfer pipe, a refrigerant vapor transfer pipe that transfers the refrigerant vapor separated in the regenerator to the condenser, a refrigerant liquid transfer pipe that transfers the refrigerant liquid condensed in the condenser to the evaporator, and a refrigerant liquid transfer pipe that transfers the refrigerant vapor separated in the regenerator to the evaporator. In an absorption heat pump device having a concentrated absorption liquid transfer pipe that transfers the concentrated absorption liquid whose concentration has been increased by This is an absorption heat pump device that is provided with a dilution refrigerant liquid transfer pipe that supplies the refrigerant into the regenerator, and an on-off valve that is opened during an emergency stop in the middle of this dilution refrigerant liquid transfer pipe.

[0006] In order to solve the above-mentioned problems, the second means of the present invention includes an evaporator for evaporating a refrigerant, an absorber for absorbing the refrigerant vapor evaporated by the evaporator into an absorption liquid, and a A regenerator for separating the refrigerant vapor by heating the diluted absorption liquid that absorbs the refrigerant in the regenerator, a condenser for condensing the refrigerant vapor separated by the regenerator, and a A refrigerant vapor transfer pipe that transfers refrigerant vapor to the absorber, a dilute absorption liquid transfer pipe that transfers the dilute absorption liquid in the absorber to the regenerator, and a refrigerant vapor that transfers the refrigerant vapor separated in the regenerator to the condenser. A transfer pipe, a refrigerant liquid transfer pipe that transfers the refrigerant liquid condensed in the condenser to the evaporator, and a concentrated absorption liquid transfer pipe that transfers the concentrated absorption liquid that has been regenerated and concentrated in the regenerator to the absorber. In an absorption heat pump device having at least a regenerator located below the evaporator, a refrigerant liquid transfer pipe for dilution is provided to supply the refrigerant liquid in the condenser to the regenerator, and the refrigerant for dilution is This is an absorption heat pump device that is equipped with an on-off valve that opens during an emergency stop in the middle of the liquid transfer pipe.

Further, in order to solve the above-mentioned problem, a third means of the present invention is a refrigerant vapor transfer system in which the refrigerant vapor separated in the regenerator is transferred to the condenser in the configuration of the first or second means. This is an absorption heat pump device that is equipped with a check valve in the middle of the pipe to prevent backflow from the condenser side.

[0008] Furthermore, in order to solve the above-mentioned problem, a fourth means of the present invention is provided in the configuration of the first or second means,
This is an absorption heat pump device in which a large number of injection holes are formed in the refrigerant liquid blow-off pipe section of the refrigerant liquid transfer pipe for dilution that is protruded into the regenerator for supplying the refrigerant liquid into the regenerator.

Furthermore, in order to solve the above-mentioned problem, a fifth means of the present invention is a dilution refrigerant liquid transfer pipe for supplying refrigerant liquid into the regenerator in the configuration of the above-mentioned first or second means. This is an absorption heat pump device that is equipped with a check valve in the middle of the regenerator and in a protruding part inside the regenerator.

0010

[Operation] According to the above configuration, when the device is stopped, the on-off valve provided in the middle of the dilution refrigerant liquid transfer pipe is opened, and the refrigerant liquid in the evaporator or condenser is transferred to the dilution refrigerant liquid. It flows into the regenerator via the transfer pipe.

[0011] Therefore, since the concentration of the absorption liquid in the regenerator is diluted, crystallization of the absorption liquid is prevented. Further, by providing a check valve in the middle of the dilution refrigerant liquid transfer pipe, it is possible to prevent the absorption liquid in the regenerator from flowing back into the evaporator or condenser.

0012

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1, the absorption heat pump device in this embodiment includes an evaporator 1 that evaporates refrigerant, an absorber 2 that absorbs the refrigerant vapor evaporated in the evaporator 1 into an absorption liquid, and Regenerator 3 for heating the diluted absorption liquid that absorbed the refrigerant in step 2 and separating the refrigerant vapor.
It has a condenser 4 that condenses the refrigerant vapor separated by the regenerator 3, a refrigerant vapor transfer pipe 11 that transfers the refrigerant vapor in the evaporator 1 to the absorber 2, and a solution pump 21 in the middle. A dilute absorption liquid transfer pipe 12 that transfers the dilute absorption liquid in the absorber 2 to the regenerator 3, and a refrigerant that has a check valve 22 in the middle to transfer the refrigerant vapor separated in the regenerator 3 to the condenser 4. Steam transfer pipe 1
3, a refrigerant liquid transfer pipe 14 which has an electromagnetic on-off valve 23 that opens when energized and transfers the refrigerant liquid condensed in the condenser 4 to the evaporator 1; A concentrated absorption liquid transfer pipe 1 that transfers the concentrated absorption liquid to the absorber 2
5, a heat exchanger 16 for exchanging heat between the concentrated absorption liquid transfer pipe 15 and the dilute absorption liquid transfer pipe 12, and an electromagnetic on-off valve 24 and a check valve that are opened during an emergency stop. 25
A first dilution refrigerant liquid transfer pipe 17 that supplies the refrigerant liquid in the evaporator 1 to the regenerator 3, and an electromagnetic on-off valve 26 and a check valve 27 that are opened during an emergency stop. and a second dilution refrigerant liquid transfer pipe 18 that supplies the refrigerant liquid in the condenser 4 to the regenerator 3, and the regenerator 3 and condenser 4 are connected to the evaporator 1 and the absorber 3. It is placed below the vessel 2.

Note that the check valves 22 and 24 are for preventing backflow of the absorbing liquid from the regenerator 3 side. In the above configuration, if the device comes to an emergency stop due to a power outage while the absorption cycle is in operation, the electromagnetic on-off valve 23
is closed, and the remaining electromagnetic on-off valves 24 and 26 are closed.
is opened, and the refrigerant liquid in the evaporator 1 and the condenser 4 flows into the regenerator 3 via the first and second dilution refrigerant liquid transfer pipes 17 and 18.

[0014] Therefore, since the concentration of the absorption liquid in the regenerator 3 is diluted, even if the temperature of the absorption liquid in the regenerator 3 decreases, crystallization of the absorption liquid is prevented. In addition,
When the refrigerant liquid flows into the regenerator 3, intense solution movement occurs due to the disappearance of boiling vapor, such as steam explosion and water hammer. , 18a to uniformly blow out the refrigerant liquid into the regenerator 3, this can be suppressed.

[0015] In this way, since crystallization of the absorption liquid is prevented when the apparatus is stopped, the apparatus can be restarted easily. Incidentally, in the above embodiment, the refrigerant liquid from the evaporator 1 and the condenser 4 is supplied into the regenerator 3, but for example, the refrigerant liquid is supplied into the regenerator 3 from either the evaporator 1 or the condenser 4. It may also be supplied to

Furthermore, in the above embodiment, each check valve 2
5 and 27 are provided in the middle of the dilution refrigerant transfer pipes 17 and 18, respectively. For example, as shown by the imaginary line in FIG. ,
That is, it may be provided in each of the blow-off pipe portions 17a and 18a.

[0017]

As described above, according to the structure of the present invention, when the apparatus is stopped, the on-off valve in the middle of the dilution refrigerant liquid transfer pipe is opened, so that the refrigerant liquid in the evaporator or condenser is diluted. The refrigerant flows into the regenerator through the refrigerant liquid transfer pipe, thus diluting the concentration of the absorption liquid in the regenerator, thereby preventing crystallization of the absorption liquid.

[Brief explanation of drawings]

FIG. 1 is a side view showing a schematic configuration of an absorption heat pump device according to an embodiment of the present invention.

[Explanation of symbols]

1 Evaporator 2 Absorber 3 Regenerator 4 Condenser 11 Refrigerant vapor transfer pipe 12
Absorption liquid transfer pipe 13 Refrigerant vapor transfer pipe 14 Refrigerant liquid transfer pipe 1
5 Concentrated absorption liquid transfer pipe 17
First dilution refrigerant liquid transfer pipe 18
Second dilution refrigerant liquid transfer pipe 24
Solenoid on-off valve 25 Check valve 26 Solenoid on-off valve 27 Check valve

Claims (5)

[Claims] Claim 1: An evaporator that evaporates refrigerant, an absorber that absorbs the refrigerant vapor evaporated by the evaporator into an absorption liquid, and a dilute absorption liquid whose concentration has been reduced by absorbing the refrigerant with the absorber. A regenerator for heating and separating refrigerant vapor, a condenser for condensing the refrigerant vapor separated by this regenerator, a refrigerant vapor transfer pipe for transferring refrigerant vapor in the evaporator to an absorber, and an absorber. a dilute absorption liquid transfer pipe for transferring the dilute absorption liquid in the regenerator;
A refrigerant vapor transfer pipe transfers the refrigerant vapor separated in the regenerator to the condenser, a refrigerant liquid transfer pipe transfers the refrigerant liquid condensed in the condenser to the evaporator, and the refrigerant vapor is regenerated in the regenerator to become more concentrated. In an absorption heat pump device having a concentrated absorption liquid transfer pipe for transferring the concentrated absorption liquid to the absorber, at least a regenerator is disposed below the evaporator, and the refrigerant liquid in the evaporator is transferred into the regenerator. An absorption heat pump device characterized in that a dilution refrigerant liquid transfer pipe is provided, and an on-off valve that is opened during an emergency stop is provided in the middle of the dilution refrigerant liquid transfer pipe. Claim 2: An evaporator that evaporates refrigerant, an absorber that absorbs the refrigerant vapor evaporated by the evaporator into an absorption liquid, and a dilute absorption liquid whose concentration has been reduced by absorbing the refrigerant with the absorber. A regenerator for heating and separating refrigerant vapor, a condenser for condensing the refrigerant vapor separated by this regenerator, a refrigerant vapor transfer pipe for transferring refrigerant vapor in the evaporator to an absorber, and an absorber. a dilute absorption liquid transfer pipe for transferring the dilute absorption liquid in the regenerator;
A refrigerant vapor transfer pipe transfers the refrigerant vapor separated in the regenerator to the condenser, a refrigerant liquid transfer pipe transfers the refrigerant liquid condensed in the condenser to the evaporator, and the refrigerant vapor is regenerated in the regenerator to become more concentrated. In an absorption heat pump device having a concentrated absorption liquid transfer pipe for transferring concentrated absorption liquid to an absorber, at least a regenerator is disposed at a position below the evaporator, and the refrigerant liquid in the condenser is transferred into the regenerator. An absorption heat pump device characterized in that a dilution refrigerant liquid transfer pipe is provided, and an on-off valve that is opened during an emergency stop is provided in the middle of the dilution refrigerant liquid transfer pipe. Claim 3: A claim characterized in that a check valve for preventing backflow from the condenser side is provided in the middle of the refrigerant vapor transfer pipe that transfers the refrigerant vapor separated by the regenerator to the condenser. Item 2. Absorption heat pump device according to item 1 or 2. 4. A diluting refrigerant liquid transfer pipe for supplying refrigerant liquid into the regenerator, the refrigerant liquid blow-out pipe portion protruding into the regenerator is provided with a large number of injection holes. Claim 1
Or the absorption heat pump device according to 2. 5. A check valve as claimed in claim 1 or 2, characterized in that a check valve is provided in the middle of the dilution refrigerant liquid transfer pipe for supplying refrigerant liquid into the regenerator and in a portion protruding into the regenerator. 2. The absorption heat pump device according to 2.