KR20030061128A - High Temperature Generator of The Absorption Chiller and Heater - Google Patents

Abstract

PURPOSE: A high temperature generator of an absorption chiller is provided to allow heat transfer area to be easily secured. CONSTITUTION: A high temperature generator(1') comprises an inner cylinder(31) having one side of a fluid inlet tube(36) built therein to change direction of flow of solution so as to extend flowing distance of solution; and an outer cylinder(32) placed on one side of the inner cylinder to cover part of the inner cylinder, joined to each other. Platy folded heat exchange fins(33) are placed on circumferential surface on one side of the inner cylinder. A cap part(34) is integrally formed on the other side of the inner cylinder to change flowing direction of solution so as to flow out the solution to outer side of the inner cylinder. A cylindrical heat exchange pipe member(35a) with both sides opened is inserted to a joining part(35) formed to be separated from a periphery of the cap part to an inside so as to form a solution channel(43) in which solution flown out through an outlet(37) flows. The heat exchange pipe member is extended to a combustion chamber(38) formed on one end of the outer cylinder to expand heat transfer area.

Description

High Temperature Generator of The Absorption Chiller and Heater

The present invention relates to a high temperature regenerator of an absorption type air conditioner, and more particularly, to a high temperature regenerator of an absorption type air conditioner that achieves miniaturization and high efficiency by maximizing the heat transfer area while suppressing the overall size from increasing.

Absorption-type heating and cooling uses liquid solubility of refrigerant gas depending on temperature and pressure, and is usually achieved by an air-conditioning cycle using absorption liquid and refrigerant using gas such as LPG or LNG as a heat source. This type of absorption heating and cooling system uses an absorber and a regenerator instead of a compressor of a conventional steam compression air conditioner that uses electricity as an energy source, thereby reducing power load in summer to prevent excessive power consumption. In addition, absorption type heating and cooling has been widely used in recent years because it can be applied to the cogeneration system using waste heat.

Generally, absorption type air conditioners are classified into a method of using water as a refrigerant and an aqueous solution such as lithium bromide (LiBr) as an absorption solution, and a method of using ammonia as a refrigerant and water as an absorption liquid. In the description of the prior art, as an example, an absorption type cooling / heating cycle using an aqueous solution of lithium bromide will be described.

1 is a view schematically showing the configuration and operation of the absorption type air conditioner. The absorption type air conditioner has a structure including a heating source and a regenerator for regenerating the absorption solution and generating the refrigerant. same.

As shown, the absorption type air conditioner heats a lithium bromide aqueous solution, which is a low concentration absorbent liquid (hereinafter referred to as a 'liquid solution'), by using the heat of combustion of a burner, and vaporizes (evaporates) the refrigerant (water) in the rare solution to absorb a medium absorbent liquid ( A low temperature regenerator (1), which is referred to as a "heavy solution", and a high temperature absorber by heating the heavy solution using the heat of condensation of the vaporized refrigerant in the high temperature regenerator (1) and vaporizing the refrigerant contained in the heavy solution. (2), a condenser (3) for cooling (condensing liquefaction) the vaporized refrigerant (water vapor) separated from these high temperature regenerators (1) and the low temperature regenerator (2) and returning it to a liquid refrigerant (water), and a condenser (3). The vaporized refrigerant evaporated in the evaporator 4 and the vaporized refrigerant evaporated in the evaporator 4 are absorbed by the high concentration absorbent liquid obtained in the low temperature regenerator 2. Equipped absorber (5) The. In addition, the absorption type air conditioner is a low temperature solution for heat-exchanging the solution circulation pump (6) for circulating the absorption solution from the absorber (5) to circulate to the high temperature regenerator (1) and the low temperature regenerator (2). A heat exchanger 7 and a high temperature solution heat exchanger 8 are provided.

In the absorption type air conditioner having such a configuration, the heavy solution in the absorber 5 absorbing the refrigerant vapor is diluted to form a dilute solution, which is pumped by the solution circulation pump 6 to be a low temperature solution heat exchanger. 7) and preheated by the hot solution recovered from the high temperature regenerator 1 and the low temperature regenerator 2 while passing through the high temperature solution heat exchanger 8, and then flows into the high temperature regenerator 1. The solution introduced into the high temperature regenerator 1 is heated by the combustion gas supplied by the combustion burner 15 provided on one side of the high temperature regenerator 1 to generate a high temperature vaporized refrigerant while generating a high temperature vaporized refrigerant.

Meanwhile, the vaporized refrigerant generated in the high temperature regenerator 1 is used as a heat source for heating the low temperature regenerator 2, and the refrigerant used in the heating of the low temperature regenerator 2 and the refrigerant generated in the low temperature regenerator 2 are condensers. In (3), the liquid is condensed and liquefied by cooling water, and the condensed liquid refrigerant flows into the evaporator (4) by gravity and pressure difference, and then evaporates to low temperature and low pressure steam while depriving the surrounding heat. do. In this process, water cooled in the evaporator 4 coil flows into the indoor unit, and heat-exchanges with the air introduced into the room, thereby cooling the room. On the other hand, the vaporized refrigerant evaporated in the evaporator (4) is absorbed by the heavy solution flowing into the absorber (5) to become a rare solution while the cycle is introduced into the high temperature regenerator (5) through the high temperature solution heat exchanger (8) Will repeat.

2 is a view schematically illustrating a heat source supply structure of a conventional high temperature regenerator in the absorption type air conditioner of FIG. 1, and FIG. 3 is an enlarged view illustrating a configuration of a conventional high temperature regenerator according to FIG. 2.

As shown, in the conventional absorption type air conditioner, the high temperature regenerator 1 has a vertical structure, and an outer case 10 having an open top is provided on the outside of the high temperature regenerator 1. The high temperature regenerator 1 is composed of an inner cylinder 11 and an outer cylinder 12, wherein the inner cylinder 11 and the outer cylinder 12 are integrally formed, and the lower portion of the outer case 10 and the inner cylinder 11 It is open downward while communicating with each other. The outer surface of the outer cylinder 12 is equipped with a heat transfer fin 13 for heat exchange of the solution, a combustion chamber 14 for generating combustion gas is formed inside the inner cylinder 11, this combustion chamber 14 On one side of the) is formed an exhaust port 14a extending in the outward direction of the outer case 10 to discharge the combustion gas. In addition, a combustion burner 15 is mounted to a lower portion of the combustion chamber 14, and one side of the combustion burner 15 is provided with a blower 16 for introducing combustion air into the combustion chamber 14. have.

Reference numeral 15a in FIG. 3 denotes a "slit" through which the flame of the burner is ejected.

The high temperature regenerator 1 is provided with a cylinder blowout cylinder 17 on the upper surface of the outer cylinder 12 to communicate with the inside, the solution for introducing the solution in a position spaced apart from the blower 17 at a predetermined interval The inflow pipe 18 is led in and below the high temperature regenerator 1. Meanwhile, a gas-liquid separation means 19 for separating the vaporized refrigerant from the solution heated by the heat of combustion of the combustion chamber 14 after being introduced into the high temperature regenerator 1 into one inner wall surface of the blowout cylinder 17; A solution outlet pipe 20 is formed to allow the solution to flow out of the high temperature regenerator 1, and the gas-liquid separating means 19 is included in the solution moving upward from the inside of the high temperature regenerator 1. The vaporization refrigerant is configured to block the side and the bottom of the solution outflow pipe 20 so that the solution outflow pipe 20 does not flow.

One side of the burner 15 is connected to the gas pipe 21 for supplying the gas for combustion, such as LPG, LNG, a plurality of gas pipe 21 to act as a safety device by switching the gas supply Gas switching valves 22a and 22b, a gas proportional control valve 23 for adjusting the gas supply amount, and a gas separation supply valve 24 that are separately provided are provided.

In the conventional absorption type air conditioner having the above configuration, the heat of combustion fin generated by the combustion gas generated inside the combustion chamber 14 heats the heat transfer fins 13 surrounding the outer cylinder 12, so that the heated heat transfer fins 13 are a high temperature regenerator (1). The temperature of the solution is increased while heat-exchanging with the internal solution to form a high temperature heavy solution. At this time, some of the solution is vaporized to change into a high temperature vaporized refrigerant, and the combustion gas is one side of the outer case 10. It is discharged to the outside through the exhaust port 14a formed in the. The high temperature heavy solution is discharged through the solution outlet pipe 20 formed on the inner wall of the discharge vessel 17 and is transferred to the high temperature solution heat exchanger (not shown) to be sprayed on the low temperature regenerator 2, and the vaporized refrigerant Is blocked by the gas-liquid separation means 19 and does not flow into the solution outlet pipe 20, but rises along the discharge vessel 17 and is supplied into the low temperature regenerator 2, and then through the high temperature regenerator refrigerant pipe 9 It is conveyed to the condenser 3 side.

The high temperature regenerator of the conventional absorption type air conditioner as described above needs to increase the calorie value of the burner in order to increase the heating and cooling capability for heating and hot water supply functions. Therefore, the burner of the burner has an excessive combustion area because the number of burners is increased.

In addition, as the number of burners increases, the shape of the salt or salt holes of the burners increases from square to rectangular, and the diameter of the high temperature regenerator increases in proportion to the size of the high temperature regenerator.

In addition, in order to secure the required heat transfer area, the height of attaching the heating fins is increased, so that the height of the high temperature regenerator is increased, so that the size of the high temperature regenerator is relatively excessive, and it is difficult to secure the required heat transfer area.

The present invention has been made to solve the above-mentioned conventional problems, it is possible to easily secure the required heat transfer area for increasing the cooling and heating capacity, as well as it can cope with various combustion loads and high efficiency small absorption type air conditioner Its purpose is to provide a high temperature regenerator.

1 is a system diagram showing the configuration and operation of the absorption air conditioner,

Figure 2 is a schematic diagram showing a heat source supply structure of the conventional high temperature regenerator according to Figure 1,

3 is an enlarged view illustrating a configuration of a conventional high temperature regenerator according to FIG. 2,

Figure 4 is a schematic diagram showing a heat source supply structure of the high temperature regenerator according to the present invention,

5 is a view showing another embodiment of the heat source supply structure according to FIG.

Explanation of symbols on the main parts of the drawings

1: high temperature regenerator 2: low temperature regenerator

3: condenser 4: evaporator

5 Absorber 6 Solution Circulation Pump

7: low temperature solution heat exchanger 8: high temperature solution heat exchanger

9: high temperature regenerator refrigerant piping 10: case

11,31: inner cylinder 12,32: outer cylinder

13: heat transfer fins 14,38: combustion chamber

14a: Exhaust port 15,40,40 ': Burner

15a, 41,41 ': Slit 16: Blower

17: outlet tube 18, 36: solution inlet pipe

19,45: gas-liquid separation means 20,46: solution outflow pipe

21: gas piping 22a, 22b: gas switching valve

23 gas proportional control valve 24 gas separation supply valve

13,33: heat exchange fin 34: cap

35 coupling portion 35a heat exchange pipe member

35b: exhaust passage 37: outlet

39: exhaust gas cylinder 39a: exhaust pipe

42: blower fan 43: solution passage

44: gas-liquid separator 47: heat insulating material

In order to achieve the above object, the present invention is the one side of the solution inlet pipe is introduced, the inner flow of the inflow solution is changed while the flow direction of the inflow solution, and the inner cylinder so that the length of the solution is to wrap a portion of the inner cylinder on one side of the inner cylinder The outer cylinder is made of a combination, the one side circumferential surface of the inner cylinder is provided with a heat exchange fin having a plate-like folded structure, the other side of the inner cylinder having an outlet to flow out of the inner cylinder to change the flow direction of the solution In the high temperature regenerator of the absorption type air-conditioner formed integrally with the cap portion, the coupling portion formed to be spaced inwardly from the outer periphery of the cap portion to form a solution passage through which the solution flowed through the outlet port between the outer passage; The cylindrical heat exchange pipe member of the bidirectional open is fitted and coupled, the heat exchange pipe member So increases the length of the liquid passages to provide a high-temperature regenerator of the absorption type Cooling & Heating, characterized in that the combustion chamber formed to the one end of the outer tube extends in length so that the heat transfer area for the expansion of the solution within the solution passage.

As a specific example of the present invention, the outer cylinder is provided in a structure in which one side is bent so that the heat transfer area is expanded with respect to the solution flowing in the solution passage.

In a more specific example, the combustion chamber-side solution passage is provided in a structure consisting of a high temperature insulating material.

In addition, the present invention provides a high temperature regenerator of the absorption type air conditioner, characterized in that the heat exchange fin has a mesh structure using a metallic wire rod.

In addition, the present invention is characterized in that the high temperature insulating material can be configured to include at least one or more of ceramic, glass fiber.

From this technical configuration, the present invention can secure the heat transfer area necessary to increase the cooling and heating capability, and can minimize the increase in the size of the high temperature regenerator, thereby providing a compact high temperature regenerator that copes with various combustion loads and has high thermal efficiency. You can do it.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The same reference numerals are given to the same components as those of the prior art, and only the new components are given the new reference numerals, and detailed descriptions of the same components are omitted.

4 is a schematic view showing a heat source supply structure of a high temperature regenerator according to the present invention. As shown in the present invention, an inner cylinder 31 having a cylindrical structure and a cylindrical outer cylinder 32 surrounding the inner cylinder 31 are shown. There is provided a horizontal high temperature regenerator 1 'which is mutually coupled in the horizontal direction.

The inner cylinder 31 is joined by welding a heat exchange fin 33 having a plate-like folding structure along the circumferential surface thereof on one side in close contact by a brazing welding method, and the other end of the heat exchange fin 33 on one side thereof. One end of the outer cylinder 32 is formed in the concave plate-shaped cap portion 34 is inserted into the circumferential surface spaced from a predetermined distance from the circumferential direction, the inner side spaced a predetermined distance from the tip of the cap portion 34 A coupling portion 35 is formed and coupled to the coupling portion 35 in a state where a cylindrical heat exchange pipe member 35a having a bidirectional open structure is fitted. On the other hand, the heat exchange pipe member 35a may be formed in a structure provided with a heat exchange member such as the heat exchange fin 33 on the inner surface.

Through the center of the cap portion 34, the solution inlet pipe 36 is introduced through the inside of the inner cylinder 31, and the solution inlet pipe between the outer periphery of the cap portion 34 and the coupling portion 35 Solution of the inner cylinder 31 along the circumferential direction so that the solution introduced into the inner cylinder 31 through the 36 flows in the outward direction of the inner cylinder 31 while changing the flow direction upward of the high temperature regenerator 1 '. An outlet 37 extending from the inside is formed. One side of the coupling part 35 is a plurality of exhaust passages through which the combustion gas carried through the outer cylinder 32 is discharged after heat-exchanging with the solution in the inner cylinder 31 while heating the heat exchange fin 33. A 35b is formed, and the exhaust passage 35b is in communication with the exhaust gas cylinder 39 formed extending from one side of the cap portion 34. The exhaust gas cylinder 39 is connected to one side of the exhaust gas cylinder 39. A discharge pipe 39a for discharging is formed.

The outer cylinder 32 has a structure in which one side is bent downward, a combustion chamber 38 is formed at the bent lower portion, one side of the combustion chamber 38 to heat the solution introduced into the inner cylinder 31. A burner 40 is provided, and one side of the burner 40 is provided with a blowing fan 42 for introducing combustion air into the combustion chamber 38.

Reference numeral 41 in FIG. 4 denotes a "slit" through which the flame of the burner 40 is ejected.

The outer cylinder 32 surrounds one side of the inner cylinder 31 and is coupled to the cap portion 34 while being along the longitudinal direction of the outer cylinder 32 between the inner surface of the outer cylinder 32 and the outer surface of the heat exchange pipe member 35a. The solution passage 43 in communication with the outlet 37 is formed. The heat exchange pipe member 35a is formed to have the same length as the outer cylinder 32 and extends to the combustion chamber 38. The solution passage 43 is the outer cylinder 32 from the coupling portion 35 of the inner cylinder 31. ) End, that is, extending to the inlet side of the combustion chamber 38. The upper portion of the outer cylinder 32 is provided with a gas-liquid separation cylinder 44 for separating the vaporized refrigerant from the solution carried from the inner cylinder 31, the inner wall surface of the gas-liquid separator 44 is a solution and vaporized refrigerant A gas-liquid separating means 45 for separating and a solution outflow pipe 46 for flowing the solution out of the high temperature regenerator 1 are formed. The gas-liquid separation means 45 is a side and a bottom of the solution outlet pipe 46 so that the vaporized refrigerant contained in the solution moving upward in the high temperature regenerator 1 does not flow into the solution outlet pipe 46. It consists of a structure that blocks the.

In the high temperature regenerator 1 ′ of the present invention having such a configuration, the rare solution flowing through the solution inlet pipe 36 is changed in a primary flow direction inside the inner cylinder 31, and the cap part 34 has two. After the flow direction of the lane is changed, it flows out through the outlet 37 formed in the cap portion 34 and flows along the solution passage 43 in communication with the outlet 37. At the same time, in the combustion chamber 38 formed on one side of the outer cylinder 32, a high temperature combustion gas is generated by the combustion heat of the burner 40, and the combustion heat of the combustion gas is the solution passage 43 on the combustion chamber 38 side. Heats the solution and heats the solution, while heating the heat exchange fin 33 and the heat exchange pipe member 35a located between the inner cylinder 31 and the outer cylinder 32 to heat the inner cylinder 31 and the inner cylinder ( 31 to form a high temperature heavy solution while heating the solution in the solution passage 43 connected to extend.

The high temperature heavy solution flowing upward along the solution passage 43 and introduced into the gas-liquid separator 44 is heated at high temperature through the solution outlet pipe 46 in the state of being gas-liquid separated by the gas-liquid separation means 45. The solution is transferred to the heat exchanger (not shown) and sprayed on the low temperature regenerator 2. In addition, the vaporized refrigerant separated from the high temperature heavy solution is supplied to the upper portion of the low temperature regenerator 2 along the gas-liquid separator 44 to supply a heat source to the heavy solution flowing down while forming a liquid film and partially condensed to the high temperature regenerator refrigerant piping It is conveyed to the condenser 3 side via (9).

Burner 40 used in the embodiment is a metal fiber burner (metal fiber burner), the fan speed of the fan 42 and the proportional control valve 23 in accordance with the cooling and heating load in normal operation is operated at the optimum air-fuel ratio If the flame is not detected in the combustion chamber 38, the gas switching valves (22a, 22b) are shut off and the blower fan (42) continues to operate for a predetermined time to exhaust the residual gas, the gas after cooling and heating operation Even after the supply is cut off and the burner 40 is extinguished, the high temperature regenerator 1 'continues to operate the blower fan 42 until the temperature decreases and reaches a predetermined temperature.

In addition, the present invention introduces one end of the solution inlet pipe 36 into which the solution is introduced into the inner cylinder 31 so that the flow direction of the solution is switched, and the inner cylinder 31 and the outer cylinder 32 communicate with each other. In order to ensure the required heat transfer area by switching the flow direction of the solution again, a high temperature regenerator 1 'having a horizontal structure is provided, and the combustion chamber 38 formed at one side of the high temperature regenerator 1' has a right angle or an inclination angle. It is provided in a bent structure, the solution in the solution passage 43 formed on the inner peripheral surface of the combustion chamber 38 side of the regenerator outer cylinder 32 is heat-exchanged by the radiant heat and convection heat generated by the combustion heat of the burner 40, The high-temperature regenerator having high heat exchange efficiency may be provided by performing heat exchange by the heat exchange fin 33 provided in the inner cylinder 31 and the combustion gas moving from the combustion chamber 38 to the exhaust pipe 39. It is possible.

On the other hand, in the above embodiment, the heat exchange fin 33 has been described as a plate-shaped folding structure, but not limited to this, using a wire (iron core) made of metal such as stainless steel (mesh) form or copper plate with high thermal conductivity It may also be configured using. In addition, in the above embodiment, one side of the outer cylinder is illustrated and described as having a vertical bent structure, but is not limited thereto.

5 is a view showing another embodiment of the heat source supply structure according to FIG. 4. In the embodiment shown in FIG. 4, the solution passage 43 formed at the inner circumference of the outer cylinder 32 is formed from the inner cylinder 31. While the metal fiber burner 40 is used as a combustion means as a configuration in which the high temperature heat insulating material is not required in the combustion chamber 38 located on one side of the outer cylinder 32, the hot regenerator 1 according to FIG. In the case of using the Bunsen-type slit burner 40 ', a part of the solution passage 43 on the combustion chamber 38 side of the outer cylinder 32 is provided in a structure in which a high temperature heat insulating material 47 is connected. The heat insulator 47 is a material that withstands high temperature, a high temperature heat insulating material such as ceramic, glass fiber may be used.

Reference numeral "41 '" in FIG. 5 denotes a "slit" through which the flame of the burner 40' is ejected.

In the high temperature regenerator 1 "of the present invention according to the embodiment, not only the Bunsen slit burner but also the metal fiber burner can be applied.

On the other hand, when the combustion chamber 38 is surrounded by a solution, there is little heat loss due to the solution, so that only a relatively thin heat insulator provides a high temperature regenerator having excellent heat insulating properties.

As described above, the high temperature regenerator of the present invention provides a structure in which the flow direction of the solution is switched to the secondary to lengthen the moving path of the solution, thereby expanding the heat transfer area to further increase the cooling and heating efficiency. Will be. In addition, the present invention is that one side of the outer cylinder is bent to provide a more extended structure of the heat transfer area of the solution passage to enable the application of a variety of burners, it is possible to easily cope with a variety of thermal loads.

As described above, the present invention can secure the heat transfer area necessary to increase the cooling and heating ability, and of course, it is possible to provide a compact high temperature regenerator that can cope with various combustion loads and has high thermal efficiency due to securing the required heat transfer area.

Claims (5)

One side of the solution inlet pipe 36 is introduced and embedded, so that the flow length of the solution is increased while the flow direction of the inflow solution is changed, and a portion of the inner cylinder 31 is disposed on one side of the inner cylinder 31. The outer casing 32 is formed to be coupled, and one side circumferential surface of the inner casing 31 is provided with a heat exchange fin 33 having a plate-like folding structure, and the other side of the inner casing 31 has a flow direction of the solution. In the high temperature regenerator of the absorption type air-conditioning and heating unit, in which the cap part 34 having the outlet 37 is integrally formed so as to flow out of the inner cylinder 31, The coupling part 35 formed to be spaced inwardly from the outer circumference of the cap part 34 forms a solution passage 43 through which the solution flowing through the outlet 37 flows between the outer cylinder 32. The cylindrical heat exchange pipe member 35a opened in both directions is inserted to be coupled to each other, and the heat exchange pipe member 35a has a length of the solution passage 43, so that the heat transfer area with respect to the solution inside the solution passage 43 is increased. High temperature regenerator of the absorption type air conditioner, characterized in that the length is extended to the combustion chamber (38) formed at one end of the outer cylinder (32) so as to expand. The method of claim 1, The outer cylinder 32 is a high-temperature regenerator of the absorption air-conditioner, characterized in that the one side is bent to expand the heat transfer area for the solution flowing in the solution passage (43). The method according to claim 1 or 2, The combustion chamber 38 side solution passage 43 is a high-temperature regenerator of the absorption type air conditioner, characterized in that composed of a high temperature heat insulating material (47). The method of claim 1, The heat exchange fin 33 is a high-temperature regenerator of the absorption type air conditioner, characterized in that the mesh structure using a metal wire. The method of claim 3, wherein The high temperature insulation material 47 is a high temperature regenerator of the absorption type air conditioner, characterized in that it can comprise at least one of ceramic, glass fiber.