KR0147749B1 - Regenerator for absorptive airconditioner - Google Patents

Abstract

The present invention relates to a regenerator of an absorption type air conditioner, and to facilitate the flow of the working solution to increase the contact area between the working solution and the inner wall surface of the regenerator to obtain a large heat transfer effect.

The object of the present invention is to prevent the rapid evaporation of the refrigerant vapor, and to form a boiling member on the inner wall surface of the regenerator to reduce the bubble flow rate of the refrigerant vapor, so that the boiling member is supported along the inner wall surface of the regenerator The above-mentioned object was achieved by forming a supporting member mesh for boiling member and forming a hole in the lower baffle so that some working solution and refrigerant vapor could flow smoothly in the regenerator.

Description

Regenerator for absorption air conditioners

1 is an operation of a typical absorption air conditioner.

2 is a cross-sectional view of a regenerator of a conventional absorption type air conditioner.

3 is a regenerator of the absorption type air conditioner of the present invention,

(a) is a cross-sectional view of the regenerator.

(b) is sectional drawing of the AA 'line | wire of (a).

* Explanation of symbols for main parts of the drawings

101: refrigerant vapor outflow tube 102: rectified liquid inlet pipe

103: steel solution inlet tube 104: chemical solution outlet tube

105: chemical solution coil 106: upper baffle

107: heating fin 108: burner

109: boiling stone 110: boiling stone support wire

111: working solution 112: lower baffle

113: hall

The present invention relates to a regenerator of an absorption type air conditioner, and in particular, to facilitate the flow of the working solution as well as to increase the contact area between the working solution and the inner wall of the regenerator to obtain a large amount of heat transfer effect.

The structure of the regenerator and its peripheral portion of the conventional absorption type air conditioner will be described as in FIG. 1 and FIG.

As shown in FIG. 1 and FIG. 2, the ammonia, which is a refrigerant, is evaporated from a strong working solution (ammonia aqueous solution) by using a non-grip to obtain ammonia refrigerant vapor, and at the same time, a weak aqueous solution of ammonia produced by evaporation of some ammonia (hereinafter, A regenerator 10 for making a medicinal solution, a solution separator 7 for separating droplets flowing together in the refrigerant vapor evaporated from the regenerator 10, and a refrigerant vapor introduced into the solution separator 7; Rectifier (9) for condensing the water evaporated together to obtain a high concentration of ammonia vapor, and a solution pump for sending a strong solution to condense the water in the refrigerant vapor flowing into the solution separator (13) ), And the refrigerant vapor sent from the regenerator 10 is heated from the indoor unit (11), and the heat is removed from the refrigerant vapor by using the coolant that the temperature is lowered. The condenser 1 for condensation and the liquid refrigerant sent from the condenser 1 are cooled by the indoor unit 11, and the evaporator is evaporated again by using cold water whose temperature has risen to make refrigerant vapor. (2), a refrigerant heat exchanger (5) formed so as to exchange heat between the liquid refrigerant from the condenser (1) and the refrigerant vapor from the evaporator (2), and the refrigerant vapor sent from the evaporator (2) The absorber 12 is configured to absorb the medicinal solution sent from the regenerator 10 to form a strong solution of the initial concentration of the original regenerator 10.

The regenerator 10 transfers the heat generated by the working solution 21 filled in the regenerator 10 and the burner 8 that heats the working fluid 21 to the regenerator 10 as shown in FIG. The heat transfer fin 20 formed to improve the heat transfer effect and the chemical solution formed in the regenerator 10 flows into the chemical solution coil 18 from the absorber 12 to the regenerator 10 to the steel solution inlet tube 16. After the heat exchange with the strong solution flowing through the medicinal solution outflow tube 17 formed to flow out of the regenerator 10 and the strong solution flowing into the regenerator 10 through the strong solution inlet tube 16 and the refrigerant vapor Baffle 19 having a flow path formed to conduct heat transfer with the medicinal solution flowing in the medicinal solution coil 18, and refrigerant vapor so that the flow rate is slowed by the baffle 19 into the solution separator 7 Refrigerant vapor outlet pipe (14) for discharging gas and refrigerant vapor evaporated from the regenerator (10) Is condensed in a solution of a liquid drop separator (7) rectified in the rectifier it consists of a solution inlet pipe (15) provided so as to flow into the regenerator (10).

The operation of the regenerator of the absorption type air conditioner having such a configuration and the problems thereof will be described below.

As shown in FIG. 1 and FIG. 2, the absorption type air conditioner is basically composed of four components: a regenerator 10, a condenser 1, an evaporator 2, and an absorber 12. As shown in FIG.

Here, the regenerator 10 applies heat to evaporate ammonia, which is a refrigerant, from a strong working solution (ammonia solution) to obtain ammonia refrigerant vapor, and at the same time, a weak ammonia solution (medicine solution) generated by evaporation of some ammonia. The refrigerant vapor evaporated in the regenerator 10 is sent to the condenser (1).

At this time, the refrigerant vapor sent to the condenser 1 performs heating from the indoor unit 11 and is deprived of heat by the coolant that has fallen in temperature to become a liquid refrigerant.

The cooling water deprived of heat from the refrigerant vapor is sent to the absorber 12 after passing through the condenser 1.

In addition, the liquid refrigerant sent from the condenser (1) is evaporated again in the evaporator (2) to produce a refrigerant vapor. At this time, the amount of heat required to evaporate the liquid refrigerant is cooled from the indoor unit (11) and the temperature is increased. It is supplied from cold water.

Cold water deprived of heat as described above is sent back to the indoor unit 11 after the temperature drops again to perform cooling.

In addition, the absorber 12 allows the refrigerant vapor sent from the evaporator 2 to be absorbed by the chemical solution sent from the regenerator 10 to form a strong solution of the initial concentration of the original regenerator 10.

At this time, in order to promote the absorption, the calorie must be removed, and the cooling water passed through the condenser 1 is used to remove the calorie.

The cooling water obtained the calorific value is again sent to the indoor unit (11) for heating.

Herein, an additional device is provided to increase the efficiency of the absorption type air conditioner. Water evaporated together with the refrigerant vapor introduced from the solution separator (7) separating the droplets flowing together in the refrigerant vapor evaporated from the regenerator (10) is used. The rectifier 9 was condensed to obtain a high concentration of ammonia vapor.

At this time, the medium for condensing water condenses the water contained in the refrigerant vapor through heat exchange with the refrigerant vapor while flowing in the coil wound in the rectifier as a steel solution sent from the solution pump 13.

In addition, the refrigerant heat exchanger (5) lowers the liquid refrigerant close to the evaporation temperature in the evaporator (2) through heat exchange between the liquid refrigerant from the condenser (1) and the refrigerant vapor from the evaporator (2), The temperature increases the temperature near the saturation temperature of the absorber 12 to accelerate the absorption phenomenon.

In addition, a small amount of refrigerant not evaporated in the evaporator 2 is evaporated.

FIG. 2 is a cross-sectional view of the regenerator 10. First, the regenerator 10 is generally filled with a working solution (aqueous ammonia solution) 21 up to a predetermined height, that is, a height at which the heating fins 20 are provided. ) Is heated by a burner 8 that generates heat outside of the regenerator 10.

In addition, a thin heat transfer fin 20 is densely formed in the lower end portion of the regenerator 10 to a portion heated by the burner 8 to improve the heat transfer effect.

The working solution 21 heated by the burner 8 starts to evaporate when the saturation temperature is reached, but since the boiling temperature of ammonia is lower than that of water, the ammonia (coolant vapor) evaporates first.

At this time, the evaporated refrigerant vapor passes through the baffles 19 installed in the regenerator 10, and the flow rate of the refrigerant vapor drops, and some of the heavy vaporized droplets are separated by the baffle 19, and the rising refrigerant vapor is the refrigerant vapor outlet pipe ( 14) is introduced into the solution separator (7).

At this time, the refrigerant vapor is gradually evaporated and the working solution 21 in the regenerator 10 has a density difference according to the concentration of the refrigerant (ammonia concentration), and the stratification phenomenon occurs according to the concentration order. From the upper part of to the lower part of the solution, a weaker ammonia solution becomes, because ammonia is less dense than water.

In addition, since the regenerator 10 forms a high pressure while the refrigerant vapor evaporates, the medicinal solution formed at the lower end due to this pressure difference flows into the medicinal solution coil 18 and flows into the steel solution formed from the absorber 12 to the regenerator 10. After performing heat exchange with the strong solution introduced through the pipe 16, the drug solution is discharged through the outlet pipe 17.

Here, the strong solution flowing into the regenerator 10 is a solution that absorbs the refrigerant vapor from the absorber 12 and becomes a strong solution (a solution having a high ammonia concentration), and includes a rectifier 9 and a solution cooled absorber. After the temperature rises while passing through the regenerator 10.

The steel solution introduced in this way is finally heat exchanged with the refrigerant vapor and the chemical solution in the regenerator 10 to increase the temperature.

Therefore, it is possible to reduce the amount of heat to heat the working solution 21 in the regenerator 10 is improved performance.

The baffle 19 not only forms a flow path for conducting heat transfer with the medicinal solution flowing into the coolant vapor and the medicinal solution coil 18 through the strong solution flowing into the regenerator 10, but also serves as an internal heat transfer fin 20. Since the heat transfer performance is improved, and the working solution inside the regenerator 10 serves as a separation wall to be separated well by the density difference.

The above operation is performed while continuously circulating while the system is in equilibrium.

However, when the regenerator of the conventional absorption air conditioner is heated through a burner and reaches a steady state, refrigerant vapor is generated in the working solution to generate a considerable amount of bubbles.

In addition, the generated refrigerant vapor bubbles are pushed up the working solution while rising upward, causing a weak cavitation of the medicinal solution at the bottom of the regenerator, and the flow of the medicinal solution flowing into the medicinal solution coil is not smooth, breaking the normal state of the system As a result of discarding, there was a problem in the normal operation of the system.

Therefore, the present invention prevents rapid evaporation of the refrigerant vapor, and forms a boiling member on the inner wall surface of the regenerator to reduce the bubble flow rate of the refrigerant vapor, and supports the boiling member so that the boiling member is supported along the inner wall surface of the regenerator The contact area between the working solution and the inner wall surface of the regenerator is eliminated by forming a wire mesh and forming a hole in the lower baffle to allow some of the working solution and the refrigerant vapor to flow smoothly in the regenerator. The purpose is to increase the heat transfer effect.

The structure of the regenerator and its peripheral portion of the absorption type air conditioner of the present invention will be described as in FIG.

As shown in FIG. 3, the working solution 111 filled in the regenerator and the heat transfer fin 107 formed to transfer heat generated from the burner 108 for heating the working solution 111 to the regenerator to improve the heat transfer effect. And a rectified liquid inlet pipe 102 formed to condense and rectify the droplets contained in the refrigerant vapor evaporated from the regenerator in the solution separator, and a chemical solution coil formed to flow the medicinal solution into the regenerator. 105), a strong liquid inlet tube 103 into which the strong solution sent by the pumping of the solution pump flows to exchange heat with the drug solution flowing in the drug solution coil 105, and the strong solution inlet tube 103 The medicinal solution outflow tube 104 is formed so that the medicinal solution exchanged with the strong solution introduced through the outflow of the regenerator and the strong solution flowing into the regenerator through the strong solution inlet tube 103 are refrigerant steam and a medicinal solution coil ( 105) The upper and lower baffles 106, 112 and the refrigerant vapor outflow pipe 101 for flowing out the refrigerant vapor flow rate is lowered by the upper baffle 106 to form a flow path to perform the drug solution and heat transfer. And, the lower baffle 112 is provided along the inner wall surface of the hole 113 and the hole 113 formed to smoothly distribute the refrigerant and the refrigerant working in the regenerator to prevent the sudden evaporation of the refrigerant vapor, the refrigerant A boiling stone 109 for lowering the bubble flow rate of steam and a boiling stone supporting wire mesh 110 for holding the thinner boiling stone 109 fixed to the inner wall surface of the regenerator.

The operation and effects of the present invention configured as described above will be described in detail with reference to FIG. 3.

As shown in FIG. 3, the regenerator is generally filled with a working solution (ammonia aqueous solution 111) up to a certain height, that is, the height of the heating fin 107, and heats the working solution 111 to the outside of the regenerator. It is heated through the burner 108 generated.

In addition, a thin heat transfer fin 107 is densely formed at the outer lower end of the regenerator to a portion heated by the burner 108 to improve the heat transfer effect.

When the working solution 111 heated by the burner 18 reaches a saturation temperature, since the boiling temperature of ammonia is lower than that of water, ammonia (coolant vapor) starts to evaporate, and bubbles are formed from the regenerator wall.

Thus, the boiling stone 109 is filled in the boiling stone support wire mesh 110 along the inner wall of the regenerator to prevent sudden evaporation of the refrigerant steam by the boiling stone 109 principle and to lower the bubble flow rate of the refrigerant steam.

At this time, the boiling stone support wire 110 is vertically fixed along the inner wall surface of the regenerator between the baffles.

The refrigerant vapor evaporated through the boiling water 109 passes through the upper baffles 106 formed in the regenerator, while the flow rate of the refrigerant vapor drops to separate some heavy droplets that evaporate together, and the rising refrigerant vapor is a refrigerant vapor outlet pipe. Through 101 is introduced into the solution separator.

At the same time, while the refrigerant vapor is gradually evaporated, the working solution 111 in the regenerator has a density difference according to the refrigerant concentration (ammonia concentration), and the stratification phenomenon occurs according to the concentration order.

Therefore, the working solution 111 becomes a weak ammonia concentration from the upper end to the lower end, because ammonia is less dense than water.

Since the regenerator forms a high pressure while the refrigerant vapor evaporates, the medicinal solution formed at the lower end by this pressure difference is sent to the solution cooled absorber through the medicinal solution coil 105.

The medicinal solution flows through the medicinal solution coil 105 and undergoes heat exchange with the strong solution introduced through the strong solution inlet tube 103 formed in the regenerator in the absorber and then flows out of the regenerator through the medicinal solution outlet tube 104. do.

Here, the strong solution flowing into the regenerator is a solution that absorbs the refrigerant vapor from the absorber to become a strong solution (a solution having a high ammonia concentration), and is formed at the top of the regenerator after the temperature rises through the rectifier and the document cool-up server. It is introduced through the strong solution inlet pipe (103).

The steel solution introduced through the steel solution inlet tube 103 flows along the upper baffle 106 and finally heat exchanges with the refrigerant vapor and the chemical solution in the regenerator, and after the temperature is raised, Joining the upper surface.

In addition, the upper and lower baffles 106 and 112 have flow paths for conducting heat transfer with the medicinal solution flowing through the refrigerant solution and the medicinal solution coil 105 through the steel solution introduced through the strong solution inlet tube 103. In addition to forming a role of the inner heat transfer fin 107, the heat transfer performance is improved, and also serves as a partition wall so that the working solution 111 inside the regenerator can be separated well by the density difference.

In particular, the hole 113 is formed in the lower baffle 112 to facilitate the flow of the working solution 111 and the refrigerant vapor through the hole 113.

Therefore, the flow path of the working solution 111 and the refrigerant steam is divided into a secondary flow path through the gas flow path formed between the baffle and the hole 113 formed in the lower baffle 112.

This is done by continuously cycling in equilibrium while the system is operating.

As described in detail above, filling the boiling stone along the inner wall of the regenerator eliminates the rapid boiling phenomenon, and also reduces the rising speed of the bubbles generated on the wall of the regenerator, thereby reducing the phenomenon in which the refrigerant vapor bubbles push up the working solution.

In addition, it allows some of the working solution and the refrigerant vapor to flow through the hole formed in the lower baffle, thereby adding a secondary flow path through the hole to the gas flow path formed between the baffles, so that the fluid flows smoothly and is formed at the bottom of the regenerator. By eliminating the cavitation, the flow of the medicinal solution flowing into the medicinal solution coil is made smoothly, so that the system operates normally.

In addition, by eliminating the cavitation formed in the lower part of the regenerator, the working solution has a larger contact surface with the inner wall surface of the regenerator, so that the heat transfer area is wider than in the prior art even in consideration of the decrease in the heat transfer area due to boiling.

Depending on the material of the boiling stone, many heat transfer effects can be obtained.

Claims (3)

A boiling member formed on the inner wall of the regenerator and cylindrically formed along the inner wall of the regenerator to prevent the rapid boiling of the refrigerant vapor and reducing the bubble flow rate of the refrigerant vapor, and having a certain clearance with the inner wall of the regenerator. A support member mesh for supporting a boiling member and forming a space so that the air can be stacked between the inner wall and the support mesh, and an oil passage between the baffles for smoothly flowing each fluid flow in the regenerator; The recirculator of the absorption air conditioner, characterized in that to form a circular and polygonal hole in the baffle to provide an auxiliary flow path to smooth the flow of fluid. The regenerator of an absorption type air conditioner according to claim 1, wherein the boiling member is formed of stone. The regenerator of claim 1, wherein the boiling member support wire mesh is vertically fixed between the baffles along the inner wall of the regenerator.