KR0140796B1 - Automatic concentration control device for air conditioners - Google Patents

Abstract

The present invention relates to an absorption type air conditioner, in particular, to maintain a constant concentration of the solution to ensure the stable performance of the system and to prevent the crystals, the concentration of the solution in the flow path of the solution to measure the excess concentration state In this case, an automatic concentration control device was provided to control the combustion device to maximize the efficiency of the system by flowing the refrigerant to the heat exchanger.

Description

Automatic concentration control device for air conditioners

1 is a schematic view of a conventional absorption type air conditioner.

2 is a schematic view of an absorption type air conditioner of the present invention.

3 is an automatic concentration control device of the present invention,

(a) is a cross-sectional view.

(b) is the detail of the A part of (a).

* Explanation of symbols for the main parts of the drawings

101: automatic concentration control device 102: concentration liquid pipe

103: concentrated solution extraction tube 104: solution container

105: concentrated liquid recovery tube 106: concentration measuring tank

107: standard weight object 108: member

109: center axis 110: white

111,112: probe

The present invention relates to an absorption type air conditioner, and in particular, to maintain a constant concentration of the solution to ensure crystallization and stable performance of the system.

The conventional absorption type air conditioner is a high temperature regenerator 1 having a burner 13 formed therein as shown in FIG. 1 (Series flow), and a separator 2 into which a solution heated by the burner 13 of the high temperature regenerator 1 flows. ), A low temperature regenerator (3) introduced after passing through the high temperature heat exchanger (12) in the separator (2), a condenser (4) into which a liquid refrigerant flows in the low temperature regenerator (3), and the low temperature regenerator (3). ) And an evaporator (7) into which the liquid refrigerant flows from the condenser (4), an absorber (6) for absorbing the liquid refrigerant in the evaporator (7), and a rare solution produced in the absorber (6). 11) is composed of a solution pump (9) and an automatic crystal release device (5) to be introduced into the high temperature regenerator (1) through.

Other reference numerals CW_I and CW_O are inlet / outlet of cooling water and CH_I and CH_O are inlet / outlet of cold and hot.

In this configuration, the flow of the solution is

High temperature regenerator (1) → separator (2) → high temperature heat exchanger (12) → low temperature regenerator (3) → low temperature heat exchanger (11) → absorber (6) → solution pump (9) → low temperature heat exchanger (11) → high temperature It becomes like the heat exchanger 12 → the high temperature regenerator 1, and the circulation of the refrigerant is

The high temperature regenerator → separator 2 → low temperature regenerator 3 → condenser 4 → evaporator 7 → absorber 6 → high temperature regenerator 1.

In this way, the solution is produced by primary regeneration in the high temperature regenerator 1, that is, by heating the solution in the burner 13 to boil it into a solution of the gas liquid and separating it into a solution and a superheated steam in the separator 2 to produce a primary concentrated solution. .

This solution flows into the cryogenic regenerator and is then reheated by the superheated steam introduced from the separator (2) and regenerated secondly into the solution and steam.

The solution obtained at this time becomes a concentrated solution, and the vapor moves to the condenser 4, condenses and becomes a liquid refrigerant.

The superheated steam introduced from the separator 2 and used for heating the solution in the low temperature regenerator 3 loses heat and becomes a liquid refrigerant and flows into the condenser 4.

Liquid refrigerant generated in the condenser (4) and the low temperature regenerator (3) flows into the evaporator (7), and the liquid refrigerant flows over the coil of the evaporator (7) using a refrigerant pump (8) to induce evaporation of cold water To cool.

At this time, the evaporated refrigerant moves to the absorber (6), and the agricultural liquid is supplied to the absorber (6) and flows down from the top. This agricultural liquid has excellent absorption capacity of the refrigerant vapor, so that the refrigerant vapor absorbs the refrigerant vapor and enables continuous evaporation. It becomes a rare solution and is recycled by being introduced into the high temperature regenerator 1 by this batch solution pump 9.

For absorption air conditioning systems, the most important is the absorbent's ability to absorb refrigerant.

This absorption capacity is a function of the concentration and temperature of the solution and is related to the regeneration capacity of the regenerator and the heat exchange capacity of the heat exchangers 11 and 12.

If the concentration of the absorbent liquid is higher than the design concentration, the performance of the system is improved, but the risk of determination is very high.

In the conventional system, when the actual crystal occurs, the automatic crystal clearing device is used to solve it, but once it is determined, it is very difficult to automatically solve the problem because the thermal conductivity of the crystal is so small that the heat transfer is not good.

In addition, when the concentration increases, it generates excessive refrigerant, which is usually designed to flow from the condenser 4 to the absorber 6, but in this case, the amount of coolant vapor required to absorb the refrigerant vapor of the absorber decreases and the concentration of the cooling water supplied to the absorber. The rise of is less than the design value.

Condensation becomes more active as it is fed to the condenser at a lower temperature of the coolant, which in turn repeats the vicious cycle of creating excess refrigerant.

In addition, when the concentration of the absorbent liquid is lower than the design value there was a problem that the absorption capacity is lowered.

The present invention has been invented in view of the above, and has a measurement means for measuring the overconcentration of a concentrated solution and a flow means for flowing a refrigerant through a heat exchanger in the case of an overconcentration state so that the concentration of the solution is kept constant. The objective is to ensure the prevention and stable performance of the system.

The invention is illustrated by FIGS. 2 and 3.

It was provided with a measuring means capable of measuring the over-concentration state of the concentrated solution in the flow path of the concentrated solution, and a flow means for flowing the refrigerant to the heat exchanger in the case of the over-concentrated state by the measuring means.

And the measuring means is discharged from the agricultural liquid pipe 102, the agricultural liquid extracting pipe 103, a portion of which is extracted from the agricultural liquid pipe 102, and the agricultural liquid extracting pipe 103 Signal emitting means for emitting a signal by the concentration of the solution, and a concentrated solution recovery tube 105 for recovering the solution poured by the signal emitting means flows into the low temperature heat exchanger (115).

In addition, the flow means has a three-way valve (114) (114 ') that can change the direction to flow the refrigerant when the signal is generated because the concentration is higher than the design value.

In addition, the amount of combustion of the combustion apparatus can be controlled according to the generation of the signal.

And the signal emitting means is a standard container formed on the opposite side around the solution container 104, the solution container 104 and the solution container 104 and the central axis 109 is contained through the agricultural solution extraction tube 103 ( 107, the solution container 104 is formed in the probe 111, the member 108 for supporting the probe 111 from the lower side, and the solution container 104 when the signal is emitted when the contact is lowered The white paper 110 was provided to press the tip of the probe 111 so that the solution could be poured out.

In addition, the standard weight object 107 is further provided with a probe 112 which is raised and contacted about the central axis 109.

In another embodiment, when the standard weight object 107 is rotated upward by a predetermined angle or more, the standard weight object 107 is rotated to a center line to provide a solution of the container 104.

When the concentrated solution flows into the concentrated solution tube 102 in this state, a portion of the solution is extracted into the concentrated solution extraction tube 103 and the solution is contained in the solution container 104 and has a weight with the standard weight object 107. In comparison, the standard weight object 107 is equipped with an object having a weight calculated using specific gravity and volume of the designed agricultural solution.

If the concentration is higher than the designed value, the over-concentration solution filled state (S ') is the solution container 104 is in contact with the probe 111, at this time emits a signal to switch in the direction of the three-way valve (141, 141') and the refrigerant The concentration is lowered by mixing the refrigerant and the solution by flowing the heat exchanger 115.

Or control to reduce the combustion amount of the combustion apparatus.

Instead of the probe 111, a signal may be generated using the probe 112 on the upper side, and may be attached to the side surface.

And the solution contained in the container 104 is to press the white paper 110 in the container by the tip of the probe 111 is to pour out the solution is a low-temperature heat exchanger through the concentrated liquid recovery pipe 105 115 is introduced into the solution container 104 is empty so that the concentration of the new solution can be measured.

In FIG. 3, the standard weight object 107 refers to an object corresponding to the specific gravity at which 62% of the concentrate is used in a general single-use cycle.

That is, if the specific concentration in the concentration and temperature of the agricultural solution corresponding to the design system is 1.7, the corresponding material is used as the standard weight material 107.

In principle, the higher the concentration at the same temperature, that is, the closer to the crystallization line (Crystallization Line), the greater the specific gravity, so that the solution container 104 is filled with an excessive concentration of solution naturally by the principle of the standard weight object 107 Rises, while solution container 104 descends.

Accordingly, the probe 111 of the lower end is pressed against the member 108.

Although not shown in FIG. 3, when the member 108 is pressed by the solution container 104, the signal line is connected like a general switch, and the signal is sent to the control unit, thereby reducing the gas consumption of the burner, thereby increasing the concentration of the concentrate regenerated in the regenerator. It operates as an automatic concentration control device that enables continuous stable cycle operation to cut off the crystals in advance by lowering the operation.

In the case of the dual-utility cycle or another cycle, the same effect can be obtained by exchanging the standard weight object 107 between the designs with an object having a weight corresponding to the density and the specific gravity at the temperature. .

The basic principle of the present invention is to take advantage of the fact that the specific gravity of the aqueous lithium bromide solution changes with concentration.

As described above, the present invention is an invention that can maximize the efficiency in connection with the combustion of the burner by using it by continuously checking the concentration of the system by preventing the problem of crystallization caused by excessively increasing the concentration of the solution in advance. .

Claims (4)

Low temperature heat exchange between a high temperature regenerator having a burner inside, a separator into which a solution heated by a burner of the high temperature regenerator flows, a low temperature regenerator introduced after passing through a high temperature heat exchanger in the separator, and a farm solution obtained by reheating in the low temperature regenerator And a signal emitting means for emitting a signal according to the concentration of the solution discharged from the agricultural liquid extracting tube, a portion of the agricultural liquid extracting tube which is partially extracted from the agricultural liquid condensing tube, and the signal emitting means for flowing to the base side; A measuring means capable of measuring an overconcentration state of the concentrated solution in a path through which the agricultural solution flows, having a concentrated solution recovery tube for recovering the solution discharged by the means to enter the low temperature heat exchanger; In this case, the refrigerant passing through the condenser or low temperature regenerator can be flowed to the low temperature heat exchanger by changing the direction of the three-way valve. Automatic concentration control device for a heating and cooling device characterized in that it comprises a flow means. The method according to claim 1, wherein the signal emitting means is a solution container containing the agricultural solution through the agricultural liquid extraction tube, the standard weight object formed on the opposite side with respect to the solution container and the central axis, and the solution container is in contact with the And a probe for emitting a signal, a member for supporting the probe from below, and a white paper formed in the solution container and pressed against the tip of the probe to pour out the solution. The apparatus of claim 2, wherein the standard object further comprises a probe contacting the center of the standard object by raising the center axis thereof. The apparatus of claim 2, wherein the standard weight object is rotated upward by a predetermined angle to rotate the standard weight object to a center line to pour a solution of the container.