KR19990055409A - Generator of Absorption Heat Pump - Google Patents

Abstract

The present invention relates to a generator of an absorption heat pump, comprising: a rectifier (40) for rectifying with ammonia vapor having high purity;

A condenser 110 for condensing the purified ammonia vapor in the rectifier 40;

The ammonia refrigerant condensed in the condenser 110 flows into the evaporator 30, and the refrigerant vapor evaporated by receiving heat from the evaporator coil moves to the absorber 100, and flows inside the evaporator coil of the evaporator 30 to evaporate. Cold water whose temperature is lowered by taking heat into the refrigerant is an evaporator 30 used for cooling;

The refrigerant vapor that has moved to the absorber 100 is separated into ammonia vapor from the generator 10, and the aqueous solution of ammonia with dilute concentration is introduced into the absorber 100 and dispersed on the surface of the cooling coil to form a liquid film. In the lower and absorbed ammonia vapor introduced from the evaporator, the concentration of the aqueous ammonia solution is sent by the solution pump is composed of a generator (10) to form a cooling cycle;

The generator 10 is divided into an inner cylinder 321 and an outer cylinder 320, the inner cylinder 321 is provided with an exhaust port in the upper portion, the inner cylinder 321 upper portion has a hemispherical head 314, the inner cylinder 321 is a gas burner having a combustion gas inlet at the bottom and a cylinder-shaped induction pipe 403 for guiding the combustion gas of the slit gas burner 316 having a circular heating area under the inner cylinder 321. The combustion gas of the slit burner having a combustion area of a rectangular induction pipe rectangular shape used when using a conventional square burner is configured to pass the combustion gas through the induction pipe 403 to the generator inner cylinder 321 through the exhaust port. By using, it is possible to reduce the temperature rise of the derived induction pipe bent portion or bent square portion, it is possible to increase the thermal efficiency of the generator by reducing the heat direction lost to the outside by the temperature rise.

In addition, the unnecessary combustion area can be reduced, so that a more compact generator can be designed and manufactured, which can provide miniaturization of an absorption type air conditioner such as a home.

Description

Generator of Absorption Heat Pump

The present invention relates to a generator of an absorption type heat pump using a refrigerant such as ammonia and water as an absorption liquid, and more particularly, to improve the regeneration efficiency and to compactly design and manufacture the overall size of the absorption type air conditioner. It is invented to be suitable, and to improve the durability by preventing local temperature rise of the induction pipe.

Absorption air conditioner using ammonia as a refrigerant and water as an absorbing liquid is a generator that generates refrigerant vapor (ammonia vapor) and a rectifier for rectifying it into ammonia vapor with a purity of 99.8% or higher. The condenser, the ammonia refrigerant condensed in the condenser is introduced into the evaporator, the refrigerant vapor evaporated by receiving heat from the evaporator coil is moved to the absorber, the cold water flowing in the evaporator evaporator coil is deprived of heat to the evaporating refrigerant to lower the temperature The refrigerant vapor moved to the evaporator and absorber used for cooling is separated into ammonia vapor from the generator, and the diluted ammonia aqueous solution flows into the absorber and is dispersed on the surface of the cooling coil to form a liquid film. Absorbs the incoming ammonia vapor Triazine ammonia aqueous solution is sent to the generator by a liquid pump is subjected to cooling to form a cooling cycle.

The ammonia absorption cycle uses a solution heat exchanger and a refrigerant heat exchanger to improve efficiency and performance, and various methods have been invented to improve the coefficient of absorption of the absorption heat pump in the cycle. And known as the best method.

In the case of water / ammonia absorption heat pumps, due to the large concentration difference, the temperature at the absorber and generator inlet and outlet is greater than the low temperature of the generator.

This is called temperature nesting, and it uses this useful heat.

The generator of the conventional ammonia-absorbing heat pump heats the generator side wall 411 surrounded by a plate heat exchanger fin 405 with the pipe burner 406 vertically as shown in FIG. To be separated.

On the other hand, as shown in Figure 6b has been proposed to increase the thermal efficiency by increasing the heat transfer path of the high temperature combustion gas is heated to the combustion dome from the bottom of the cylinder dome-shaped generator is circulated inside the dome.

In the conventional generator, as shown in FIG. 6A, the heating method of the side wall 411 by the pipe burner 406 is almost uniform in the generator temperature distribution in the vertical direction of the generator, so that one side wall of the heating surface is heated and the other side wall is heated. It is lower than the counterpart side wall to form a circulating laminar flow inside, so that the medicinal solution moves to the bottom, and the ammonia solution with high ammonia concentration and the ammonia concentration moves to the top, so that the concentration rises vertically upward and decreases downward. There is action.

Therefore, there is a side to increase the absorption rate in the absorber by providing the drug solution outlet 409 in the lower part of the generator to send the drug solution to the absorber, but the gas burned in the pipe burner 406 locally heats the generator and mostly serves as an exhaust port. There is a disadvantage that the heat loss of the generator is large and the thermal efficiency of the generator is low.

On the other hand, the vessel heating type generator of FIG. 6B has a long contact path between the combustion gas and the generator, and has heat exchange fins 512 and 513 disposed on the outer wall and the inner wall of the lower dome of the generator. As the solution is boiled, it is not easy to separate the concentration difference of the solution in the generator, so that the concentration of the solution that is sent to the absorber may be high, thereby reducing the efficiency of the absorption chiller or air conditioner.

In addition, since the slit burner 506 is used, in order to increase the performance of the ultra-small capacity, the number of slit burners must be increased to increase the heat of combustion of the burner. Increase the generator lower diameter.

Since the increase in diameter is a high pressure in the case of the ammonia generator, the normal operating pressure is 1.5MPa, the thickness of the generator is thick to withstand such pressure.

As a result, there is a disadvantage in that the size of the generator is increased and the heat transfer efficiency is reduced to reduce the generator efficiency.

In order to compensate for these disadvantages and increase the efficiency of the absorption type air conditioner and miniaturization, the inner cylinder 321 is provided with a cylinder-shaped inner cylinder 321 and an outer cylinder 320 as shown in FIG. It is known that the inner wall 321 of the inner wall 321 is heated to allow combustion gas to pass through to regenerate the solution inside the generator.

In addition, the gas burner, which is a heating source, has a rectangular structure at the bottom and a cylinder shape at the top thereof so that the combustion area can be connected to the generator inner cylinder 321 of a cylindrical shape when the slit burner 362 has a rectangular rectangle or a square shape. Induction pipe 307 is provided with a pipe induction pipe 307 to connect the burner and the generator inner cylinder, the generator inner cylinder 321 and the cylindrical joint 309 of the upper portion of the induction pipe is joined by welding induction pipe The generator was configured to have an induction pipe 307 so that heat transfer is made to the generator by a path where the high temperature of the bent portion 307 is welded to the lower part of the generator.

However, the induction pipe 307 of this type has a fear that the bent portion 353 and the square corner portion 352, in which the square area of the lower portion of the induction tube is in contact with the circular area of the upper portion, are intensively heated to become high temperature.

It is an object of the present invention to provide a generator with maximized performance.

Another object of the present invention is to provide a generator suitable for a small or domestic absorption chiller or air conditioner by miniaturizing its size.

Another object of the present invention is to provide a generator having a burner that prevents the temperature rise of the bent or bent portion of the induction pipe derived by using a slit burner having a square combustion area to improve durability and performance. It is.

1 is a principle diagram of the absorption heat pump system of the present invention

Figure 2a is a device diagram showing the generator of the absorption heat pump of the present invention

Figure 2b is a perspective view of the heating fins of the present invention

Figure 3 is an exploded perspective view showing a conventional guide tube and burner

Figure 4 is an exploded perspective view showing the induction pipe and the burner of the present invention

5 is an external perspective view of the absorption heat pump generator of the present invention.

6a and 6b is a device diagram showing a generator of a conventional absorption heat pump

Explanation of symbols for main parts of the drawings

10-Generator 20-GAX Absorber

30-Evaporator 40-Rectifier

50-GAX Part 60-Solution Cooling Absorber

70-Solution Pump 80-Refrigerant Heat Exchanger

90-GAX Generator 100-Absorber

110-Condenser 316-Slit Burners

The object of the present invention is to provide a rectifier 40 for rectifying the ammonia vapor having high purity of claim 1;

A condenser 110 for condensing the purified ammonia vapor in the rectifier 40;

The ammonia refrigerant condensed in the condenser 110 flows into the evaporator 30, and the refrigerant vapor evaporated by receiving heat from the evaporator coil moves to the absorber 100, and flows inside the evaporator coil of the evaporator 30 to evaporate. Cold water whose temperature is lowered by taking heat into the refrigerant is an evaporator 30 used for cooling;

The refrigerant vapor that has moved to the absorber 100 is separated into ammonia vapor from the generator 10, and the aqueous solution of ammonia with dilute concentration is introduced into the absorber 100 and dispersed on the surface of the cooling coil to form a liquid film. In the lower and absorbed ammonia vapor introduced from the evaporator, the concentration of the aqueous ammonia solution is sent by the solution pump is composed of a generator (10) to form a cooling cycle;

The generator 10 is divided into an inner cylinder 321 and an outer cylinder 320, the inner cylinder 321 is provided with an exhaust port in the upper portion, the inner cylinder 321 upper portion has a hemispherical head 314, the inner cylinder 321 is a gas burner having a combustion gas inlet at the bottom and a cylinder-shaped induction pipe 403 for guiding the combustion gas of the slit gas burner 316 having a circular heating area under the inner cylinder 321. Is achieved by passing the combustion gas through the induction pipe 307 to the generator inner cylinder 321 to be discharged to the exhaust port.

Therefore, the temperature rise of the curved portion or the curved square portion of the induction pipe 403 can be reduced, and the thermal efficiency of the generator can be improved by reducing the amount of heat lost to the outside due to the temperature rise.

In addition, the unnecessary combustion area can be reduced, so that a more compact generator can be configured, thereby miniaturizing the absorption type air conditioner.

According to claim 2, the long slit burner 407 is located at the center, and the short slit burners 406 and 408 are gradually provided out of the center line to form a circular heating area 409 with a rectangular slit burner. The heating area of the circular cross-sectional area equal to the cross-sectional area of the inner cylinder 321 of the generator heat transfer area may be formed, and a circular heating area may be obtained by combining the slit burners 407 having a long length in the longitudinal direction.

In addition, the flow of the combustion gas can be configured smoothly, and the length of the induction pipe 403 can be shortened, thereby reducing heat loss, reducing the size of the burner, and reducing the diameter of the generator. The size of the air conditioner or cold / hot water machine can be made compact.

Claim 3 claims that the different length of the slit burners (407, 406, 408) constituting the burner has a different calorific value and different fuel gas amount by length or capacity by each slit burner length or capacity The folder nozzle diameter is configured to be different.

Therefore, there is an effect that the combustion amount per unit heating area is uniform, there is no difference in combustion flame per unit area, and the risk of incomplete combustion is small by making the supply of secondary air uniform.

Claim 4 joins the lower surface of the inner cylinder 321 and the upper surface of the induction pipe 403 by welding so that the temperature of the induction pipe 403 is rapidly transferred to the lower surface of the generator that is in contact with a solution having a large latent heat by heat transfer. By doing so, the temperature rise of the induction pipe 403 is prevented.

In addition, a heat insulating material such as a donor shaped asbestos is provided between the lower connection surface 310 of the induction pipe 403 and the connection surface 311 between the burner portion to prevent the temperature rise of the burner portion.

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

1 is an overall circuit diagram showing the absorption heat pump system of the present invention, Figure 4 shows an induction pipe and burner structure of the present invention in an exploded perspective view.

Figure 5 shows a perspective view of the outside of the generator of the absorption heat pump of the present invention.

The operating principle of the ammonia absorption heat pump as shown in Figure 3 is to absorb the evaporation heat generated when the refrigerant (ammonia) evaporates in the absorbing solution (water or rare solution) to take the heat, and to absorb the heat absorbed appropriate cooling means (cooling tower Alternatively, the heat is released to the outside using an air-cooled cooling device, and when the refrigerant evaporates, the heat is deprived of heat, and the cooled evaporator 30 is appropriately exchanged for cooling or freezing, and the ammonia concentration is increased through absorption of the refrigerant (ammonia). The elevated absorbent solution is allowed to be regenerated by appropriate heating means.

The absorption type air conditioner using ammonia as a refrigerant and water absorbent as an absorbent includes a generator 10 for generating refrigerant vapor (ammonia vapor) and a rectifier 40 for rectifying it into high purity ammonia vapor. The condenser 110 condensing ammonia vapor, the ammonia refrigerant condensed in the condenser 110 is introduced into the evaporator 30, the refrigerant vapor evaporated by receiving heat from the evaporator coil is moved to the absorber 100, the evaporator The cold water flowing in the evaporation coil of 30 to the heat evaporated by the refrigerant evaporated, the evaporator 30 used for cooling, the refrigerant vapor moved to the absorber 100 is separated into ammonia vapor in the generator (10) Aqueous solution of dilute ammonia flows into the absorber 100 and is scattered on the surface of the cooling coil to form a liquid film, and flows down in the vertical direction. And an absorber 100 for absorbing the ammonia vapor, and a solution pump 70 for sending the ammonia solution having a higher concentration to the generator.

The absorption heat pump configured as described above is heated by gas combustion in the generator 10 to obtain a solution (medical solution) in which ammonia, a refrigerant having a low boiling point, evaporates and ammonia concentration is reduced.

This solution is sent to the absorber and the steam generated in the generator contains a lot of water vapor in addition to ammonia, so the ammonia concentration is increased in the rectifier 40 to the condenser 110.

The ammonia vapor, whose concentration is increased to 99.8% through the rectifier, is condensed in the condenser, and the condensed ammonia solution (strong solution) is sent to the evaporator 30, sprayed by the feeder to the evaporator heat pipe, and evaporated in the evaporator heat pipe. Cooling effect is obtained. The evaporated ammonia refrigerant is introduced into the absorber 100 through the refrigerant heat exchanger and absorbed by the absorbing solution (medical solution) that is sprayed on the absorber heat pipe. The heat of absorption absorbed by the absorber is released to the atmosphere.

Absorption solution (strong solution), the concentration of which is increased in the absorber 100, is introduced into the generator 10 through several heat exchangers to increase efficiency by a solution pump, and a cycle is configured to repeat the regeneration process. maintain.

When heating, the air-conditioning switching valve indicated by the dotted line blocks the flow path to the condenser and the absorber during cooling and goes to the flow path indicated by the dotted line. This action is the hot steam generated in the generator 10 is directed to the evaporator 30 without moving to the condenser to heat the evaporator heat pipe and takes the heat source of heating through heat exchange with the evaporator heat pipe.

The ammonia solution condensed by dissipating heat by heating is circulated to the generator through the rectifier solution cooling absorber and the GAX generator by the solution pump in the lower part of the absorber and reheated to maintain the heating cycle.

When heating, do not allow cooling of the condenser and absorber. That is, in the case of the air cooling type, the cooling fan is stopped and in the case of the water cooling type, the cooling water pump is not operated so that unnecessary heat is not released to the outside air. In particular, the condenser is not cooled in the condenser to prevent condensation.

The generator of the present invention is a generator 10, rectifier 40 or GAX generator 90 is an absorption type heat pump (cooler or cold water heater) in the form of a separate type or in the cylinder type absorption heat pump (cooler or cold water heater) or in an integral type It consists of an inner cylinder 321 and an outer cylinder 320 in the form of a cylinder.

There is a solution in the space between the inner cylinder 321 and the outer cylinder 320 to pass the combustion gas inside the inner cylinder to heat the inner wall of the inner cylinder 321 to regenerate the solution inside the generator in the inside of the ring-shaped stainless steel The coil 324 is provided, and the chemical solution inlet 304 is provided at the bottom of the stainless coil 324.

In addition, a chemical solution outlet 303 is provided on the generator to form a pipe 303 through which the chemical solution moves to the absorber, to improve heat transfer efficiency inside the inner cylinder of the generator, and to form a plate-shaped stainless steel so that the temperature in the generator vertical direction is uniform. Or it is provided with a bent plate heat exchanger fin 306 of the same material.

Meanwhile, the inner wall of the generator inner cylinder 321 is joined to the inner wall of the generator 321 to increase the heat transfer effect to prevent high temperature corrosion by the high temperature combustion gas, and the gas burner 316 as the generator heating source has a circular combustion area. By using a slit burner 316 composed of a cylindrical inner cylinder 321 of the cylindrical form and the induction tube 403 of the cylindrical shape to enable connection without changing the cross-sectional area, the generator inner cylinder 321 and the upper portion of the induction pipe The joining portion 309 in the form of a cylinder is joined by welding so that the exhaust gas moves in a straight vertical upward flow into the generator inner cylinder so that heat is transferred through the generator inner cylinder.

The gas burner, which is a heating source in the generator, has a slit burner 407 having a long length and a short slit burner 406 and 408 gradually positioned out of the center line to form a circular heating area with a rectangular slit burner. Configure the generator burner.

As such, the slit burners 406, 407, and 408 having different lengths of the burners are configured to have different calorific nozzle diameters by length or capacity so as to have a calorific value by length and different fuel gas amount by length or capacity of the slit burner. do.

Meanwhile, in the generator, the circular inner cylinder lower surface 312 and the induction and the upper surface 313 are joined by welding, and a donor shaped asbestos is connected between the lower connection surface 313 of the induction pipe and the connection surface 311 of the burner part. The burner unit assembly is completed through the heat insulating material.

The generator of the present invention can be applied to the rectifier 40 or the GAX generator 90 is separated from the generator 10 or integrally formed in the absorption type air conditioner or cold water heater configured as described above, in addition to the ammonia-absorbing heat pump It is a device that can be applied as a regenerator in a cold / hot water machine or an air conditioner using bromide as an absorbent.

Such the present invention, by using a slit burner having a combustion area of the rectangular guide tube square used when using a conventional rectangular burner according to claim 1, the temperature of the guide tube bent or curved square portion derived The rise can be reduced, and the thermal efficiency of the generator can be improved by reducing the heat loss lost to the outside due to the temperature rise.

In addition, the unnecessary combustion area can be reduced, so that a more compact generator can be designed and manufactured, which can provide miniaturization of an absorption type air conditioner such as a home.

According to claim 2, a circular heating area can be obtained by combining a slit burner having a long length in the longitudinal direction by constituting a heating area shape of a circular cross-sectional area equal to the cross-sectional area of the inner tube of the generator heat transfer area.

In addition, the flow of the combustion gas can be configured smoothly, and the length of the induction pipe 403 can be shortened, thereby reducing heat loss, reducing the size of the burner, and reducing the diameter of the generator. The size of the air conditioner or cold / hot water machine can be made compact.

According to claim 3, there is an effect that the combustion amount per unit heating area is uniform, there is no difference in combustion flame per unit area, and the risk of incomplete combustion is small by making the supply of secondary air uniform.

According to claim 4, the temperature rise of the induction pipe is prevented, and between the lower connection surface 310 of the induction pipe and the connection surface 311 of the burner part is provided with a heat insulating material, such as a donor type asbestos, to increase the temperature of the burner part. It is effective in preventing.

Claims (2)

A rectifier 40 for rectifying with ammonia vapor having high purity; A condenser 110 for condensing the purified ammonia vapor in the rectifier 40; The ammonia refrigerant condensed in the condenser 110 flows into the evaporator 30, and the refrigerant vapor evaporated by receiving heat from the evaporator coil moves to the absorber 100, and flows inside the evaporator coil of the evaporator 30 to evaporate. Cold water whose temperature is lowered by taking heat into the refrigerant is an evaporator 30 used for cooling; The refrigerant vapor that has moved to the absorber 100 is separated into ammonia vapor from the generator 10, and the aqueous solution of ammonia with dilute concentration is introduced into the absorber 100 and dispersed on the surface of the cooling coil to form a liquid film. In the lower and absorbed ammonia vapor introduced from the evaporator, the concentration of the aqueous ammonia solution is sent by the solution pump is composed of a generator (10) to form a cooling cycle; The generator 10 is divided into an inner cylinder 321 and an outer cylinder 320, the inner cylinder 321 is provided with an exhaust port in the upper portion, the inner cylinder 321 upper portion has a hemispherical head 314, the inner cylinder 321 is a gas burner having a combustion gas inlet at the bottom and a cylinder-shaped induction pipe 403 for guiding the combustion gas of the slit gas burner 316 having a circular heating area under the inner cylinder 321. The combustion gas of the generator of the absorption heat pump, characterized in that configured to pass the combustion gas through the induction pipe 307 through the generator inner cylinder (321) to the exhaust port. The burner of claim 1, wherein a long slit burner 407 is disposed at the center thereof, and a short slit burner 406 and 408 are gradually provided out of the center line to form a circular heating area 409 as a rectangular slit burner. Generator of absorption heat pump, characterized in that.