KR100222104B1 - Air cooling machine - Google Patents

Abstract

[assignment]

Provides an air conditioner using an absorption refrigeration system that can reduce the operating cost of the dehumidification operation by configuring a heating source using the temperature of the cooling water before cooling in the cooling tower.

[Resolution]

An air conditioning heat exchanger (44), which is connected to an absorption refrigeration apparatus (100) and an evaporation coil (41), and comprises an air conditioner (CU) having an air conditioner heat exchanger (44) and a blower (46) through which hot and cold water is circulated. A dehumidification operation heat exchanger (45) connected to the cooling coil (41) downstream of the air stream generated by the blower was installed.

Description

Air conditioner using absorption refrigeration unit

1 is a conceptual diagram of an air conditioner using an absorption refrigeration apparatus.

2 is a schematic configuration diagram of an indoor unit according to a second embodiment.

3 is a conceptual diagram of an air conditioner according to the third embodiment.

4 is a conceptual diagram of an air conditioner according to the fourth embodiment.

* Explanation of symbols for main parts of the drawings

1: high temperature regenerator 2: low temperature regenerator

3: absorber 30: evaporation / absorption case

31: cooling coil 34: cooling water flow path

35: three way switching solenoid valve (dehumidification operation solenoid valve)

4: evaporator 40: partition bin

41: evaporation coil 44: air conditioning heat exchanger

45: heat exchanger for dehumidification operation 46: blower

47: cooling water flow path 5: condenser

51 cooling coil 70 water cooling device

71: water-cooled heat exchanger 75: water supply means

78: blower 100: absorption refrigeration unit

101: freezer body CU: indoor unit

CT: cooling tower P1: absorbent pump

L3: Low Concentration Absorption Fluid

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to an air conditioner using an absorption refrigeration apparatus using an aqueous solution such as lithium bromide as an absorption liquid.

[Prior art]

In an air conditioner using an absorption refrigeration system, a high concentration absorption liquid and a refrigerant liquid are generated by heating / boiling a low concentration absorption liquid with a burner in a regenerator during a cooling operation. The coolant liquid is sprayed on an evaporator to the evaporating coil through which hot and cold water, which is an air-conditioning heating medium, flows away from the evaporating coil to evaporate to cool the hot and cold water. The evaporated refrigerant is absorbed by the sprayed high concentration absorbing liquid in the absorber which sprays the high concentration absorbing liquid onto the cooling coil in which the cooling water for arraying flows.

Absorption heat generated when absorbing the refrigerant vapor is absorbed by the cooling water to maintain the temperature, thereby maintaining the absorption capacity on the surface of the absorption coil.

The low concentration absorbing liquid absorbed by the refrigerant and low in concentration is returned to the regenerator through the low concentration absorbing liquid flow path provided with the absorbing liquid pump. The hot and cold water is circulated from the evaporation coil to the indoor air conditioning unit by the cold / hot water pump through the cold / hot water pipe. The indoor air conditioning unit includes a heat exchanger and a blower, and the indoor air is heat-exchanged and blown into the room by the heat exchanger. The cooling water is circulated from the cooling coil to the cooling tower by the cooling water pump through the cooling water pipe and cooled.

[Problems that the invention tries to solve]

The air conditioning unit is capable of cooling indoor air by cooling operation, but in order to prevent dehumidification operation of lowering the discharge temperature and lowering only humidity, it is necessary to install a separate heating source such as an electric heater, so that the operation cost ratio of the dehumidification operation is reduced. This raises the problem.

An object of the present invention is to provide an air conditioner using an absorption type refrigeration apparatus that can reduce the dehumidification operation operation cost.

[Means for solving the problem]

In the regenerator, the low concentration absorption liquid is separated into a high concentration absorption liquid and a refrigerant, and in the evaporator, the refrigerant liquid is sprayed on an evaporation coil through which cold and hot water as an air-conditioning heating medium flows to evaporate, and the cold and hot water is cooled. In the absorber, the absorbing liquid is sprayed onto the cooling coil which is connected to the cooling tower and flows the cooling water therein to absorb the evaporated refrigerant, and the absorbed low concentration absorbent liquid is absorbed by the absorbent liquid pump installed in the low concentration absorbent liquid flow path. An air conditioner comprising an absorption refrigeration apparatus for returning to a regenerator and an indoor unit having an air conditioner heat exchanger and a blower connected to the evaporation coil and circulating the cold and hot water, wherein the air conditioner generated by the blower For the arrangement from the cooling coil downstream of the air stream The provision of the heat exchanger for dehumidification operation in which cooling water flows is described in claim 1.

In the invention according to claim 2, the absorption refrigeration apparatus has a condenser having a cooling coil for liquefying the separated refrigerant, and the cooling water has a cooling tower, a cooling coil of the absorber, a cooling coil of the condenser, and a cooling water connecting the cooling tower. Circulate the flow path.

In the invention according to claim 3, a solenoid valve for dehumidification operation for forming a branch cooling water passage to the dehumidification operation heat exchanger in the middle of the cooling water passage connecting the cooling coil and the upstream of the cooling tower, and opening and closing the branch cooling water passage. Was installed.

In the invention according to claim 4, the cooling tower according to claim 1 comprises a water cooling heat exchanger through which cooling water flows and a water supply means for supplying heat radiation water to the water cooling heat exchanger. The circulation path was formed as a closed circuit that does not open to the atmosphere.

In the invention according to claim 5, the cooling tower comprises a water cooling heat exchanger through which cooling water flows, and a blower for supplying air for radiating heat to the water cooling heat exchanger. It is to be formed as a closed circuit that does not open to.

In the invention according to claim 6, the cooling tower comprises a water cooling heat exchanger through which cooling water flows and a water supply means for supplying heat radiation water to the water cooling heat exchanger. It is to be formed as a closed circuit that does not open to.

In the invention according to claim 7, the cooling tower comprises a water cooling heat exchanger through which cooling water flows and a water supply means for supplying heat radiation water to the water cooling heat exchanger. It is to be formed as a closed circuit that does not open to.

In the invention according to claim 8, the cooling tower comprises a water cooling heat exchanger through which cooling water flows, and a blower for supplying heat for radiating heat to the water cooling heat exchanger, and the circulation path of the cooling water is in the atmosphere. It is to be formed as a closed circuit that does not open to.

In the invention according to claim 9, the cooling tower according to claim 3 comprises a water cooling heat exchanger through which cooling water flows and a blower for supplying air for radiating heat to the water cooling heat exchanger. It was to be formed as a closed circuit that does not open to the atmosphere.

[Action / effect of the invention]

In the air conditioner, the dehumidification operation is performed by heating the air conditioning air cooled by using the arrangement of the cooling water and the moisture content is lowered by the condensation, so that the dehumidification operation can be performed without installing a separate heating source such as an electric heater. Therefore, the dehumidification operation can be operated at the same cost as the cooling operation.

[Embodiment of the Invention]

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention mentioned above is described in detail based on drawing.

FIG. 1 shows an air conditioner. An outdoor unit is provided with an absorption refrigeration apparatus 100 including a refrigeration base body 101 and a cooling tower (cooling tower; CT), and an indoor unit (cooling unit; CU) is installed. This air conditioner is controlled by the controller 102.

The refrigeration body 101 includes a high temperature regenerator 1 and a low temperature regenerator 2, and a gas burner B as a heating source is disposed below the high temperature regenerator 1. The outer periphery of the low temperature regenerator 2 is provided with the absorber 3 and the evaporator 4, and the condenser 5 is provided above the evaporator 4. As shown in FIG.

The high temperature regenerator 1 is heated by the gas burner B and heated to boil the low concentration absorbing liquid therein, and extends from the top of the heating tank 11 to the upper side so that the refrigerant vapor and the refrigerant vapor It has a heavy absorbent liquid separation tank 12 for separating the concentrated absorbent liquid by evaporation. At the outer periphery of the medium concentration absorbent liquid separation cylinder 12, a vertical cylindrical airtight refrigerant recovery tank 10 for recovering refrigerant vapor is provided.

The low temperature regenerator 2 has a vertical cylindrical low temperature regenerator case 20 which is centered on one side of the outer side of the refrigerant recovery tank 10. The low temperature regenerator case 20 has a refrigerant vapor outlet 21 formed on the ceiling, and the top portion thereof is connected to the bottom portion 121 of the medium absorbent liquid separation tank 12 by the medium absorbent liquid flow path L1. have.

The low temperature regenerator case 20 is supplied with a medium concentration absorption liquid through a heat exchanger H by the pressure difference, and the outer wall of the refrigerant recovery tank 10 is boiled again as a heat source to separate the refrigerant vapor and the high concentration absorption liquid. A cylindrical cylindrical airtight evaporation / absorption case 30 is concentrically installed on the outer periphery of the low temperature regenerator case 20, and a condenser case 50 is provided above the evaporation / absorption case 30.

The refrigerant recovery tank 10, the low temperature regenerator case 20, and the evaporation / absorption case 30 are integrally welded to the bottom plate 13 to form the refrigeration base body 101. The upper portion of the low temperature regenerator case 20 is a gas-liquid separator 22 and communicates with the inside of the condenser case 50 through the refrigerant vapor outlet 21 and the gap 5A.

The absorber 3 arranges the cooling coil 31 wound around the inside of the evaporation / absorption case 30 in a vertical cylindrical shape, and sprays the high concentration absorption liquid onto the cooling coil 31 on the upper side thereof. It is made by mounting a high concentration absorbing liquid spraying port (32). The absorber 3 is used at the time of cooling operation, and the cooling water for the array cooled by the cooling tower CT is circulated in the cooling coil 31.

The high concentration absorption liquid receiving unit 23 of the low temperature regenerator 2 is connected to the high concentration absorption liquid spraying port 32 by the high concentration absorption liquid supply passage L2 through the heat exchanger H. The high concentration absorbing liquid is introduced into the high concentration absorbing liquid spraying port 32 by the pressure difference, and the high concentration absorbing liquid introduced is sprayed on the upper end of the cooling coil 31 to attach to the surface of the cooling coil 31 to form a membrane shape. Gravity flows downward. Between the bottom part 33 of the absorber 3 and the bottom part of the heating tank 11 is connected by the low concentration absorption liquid flow path L3 with which the heat exchanger H and the absorption liquid pump P1 were attached.

The evaporator 4 is provided with a partition cylinder 40 having a communication hole in the shape of a vertical cylinder in the outer circumference of the cooling coil 31 in the evaporation / absorption case 30, and is provided inside the outer circumference of the partition cylinder 40. The evaporating coil 41 is installed in a vertical cylindrical shape in which cold and hot water for cooling and heating flows, and a refrigerant liquid spraying port 42 is attached to the upper side thereof. The bottom portion 43 of the evaporator 4 communicates with the bottom portion 121 of the medium concentration absorbent liquid separator 12 by the heating absorbent liquid passage L4 having the heating solenoid valve 6.

The coolant liquid spraying port 42 is used during the cooling operation to drop the coolant liquid onto the evaporation coil 41. The loaded refrigerant wets the surface of the evaporation coil 41 by the surface tension and flows downward by the action of gravity, and the evaporation coil 41 is in the low pressure evaporation / absorption coil 41. The evaporation heat is removed from the vaporization heat, and the cold and hot water for cooling and heating flowing in the evaporation coil 41 is cooled.

The condenser 5 is used in the cooling operation, and is provided by installing a cooling coil 51 in which the condenser case 50 circulates inside the condenser case 50 in which the cooling water for the arrangement cooled by the cooling tower CT is circulated.

The condenser case 50 communicates with the bottom portion 14 of the coolant recovery tank 10 by the coolant flow path L5, and the low temperature regenerator 2 through the coolant steam outlet 21 and the gap 5A. ), The refrigerant is supplied by the pressure difference.

The refrigerant supplied to the condenser case 50 is cooled by the cooling coil 51 to liquefy.

The coolant liquid spraying port 42 provided in the lower part of the condenser 5 and the upper part of the evaporator coil 41 of the evaporator 4 is connected by the coolant liquid supply path L6. The liquefied refrigerant liquid is supplied to the refrigerant liquid spraying port 42 through the refrigerant cooler 52 provided in the refrigerant liquid supply path L6.

In this embodiment, the cooling coil 31 is connected to the cooling coil 51, and is connected by the cooling tower CT and the cooling water flow path 34. As shown in FIG. Cooling water channel 34 is equipped with a cooling water pump (P2), the cooling water absorbed heat and condensation heat absorbed from the cooling coil 31 and the cooling coil (51) to a relatively high temperature of the cooling tower through the cooling water channel (34) CT). In the cooling tower CT, a portion of the cooling water falling is evaporated into the atmosphere, and the remaining cooling water is self-cooled. The cooling water, which has been heated by the endotherm, is radiated to the air to form an arrangement cycle in which the temperature is low. Doing. Moreover, the evaporation of the said cooling water is accelerated | stimulated by the blowing from blower S. FIG.

At the cooling water flow path 34 between the outlet of the cooling coil 51 and the cooling tower CT, a three-way switching solenoid valve 35, which is a solenoid valve for dehumidification operation, is provided, and a branch cooling water flow path 36 is connected. . The indoor unit CU is composed of an air conditioning heat exchanger 44, a heat exchanger 45 and a blower 46 for the dehumidification operation provided in a downstream side of the air flow by the air conditioning heat exchanger 44 blower 46. .

In this embodiment, the blower 46 is a blower type, and the blower 46 according to the flow of the wind. Air Conditioning Heat Exchanger (44) The heat exchanger 45 for dehumidification operation is arrange | positioned in order. In addition, when the blower 46 is a suction type, as shown in FIG. 2, the air-conditioning heat exchanger 44 Dehumidification Heat Exchanger (45) The blowers 46 are arranged in this order.

Both ends of the evaporation coil 41 are connected to an air conditioning heat exchanger 44 installed in the indoor unit CU by a cold / hot water flow passage 47 formed of a rubber hose or the like. The cold / hot water flow passage 47 is provided with a cold / hot water pump P3 and circulates the cold and hot water of low temperature with the air conditioning heat exchanger 44. The dehumidification operation heat exchanger 45 is connected to the branch cooling water flow path 36, and by the operation of the three-way switching solenoid valve 35, high-temperature cooling water before cooling in the cooling tower CT is supplied, and the cooling water is Again flows to the cooling tower (CT).

By the above configuration, the cooling water is cooled by the cooling water pump P2 during the cooling operation. Cooling Coil (31) Cooling Coil (51) It circulates in order of cooling tower CT. In addition, the absorption liquid, the high temperature regenerator (1) Low Temperature Regenerator (2) Absorber (3) Absorption liquid pump (P1) The high temperature regenerator 1 is circulated in order. In addition, low-temperature cold / hot water circulates in order, and the room is cooled by the blower 46.

When the dehumidification operation is selected, the absorption refrigeration apparatus 100 supplies cold and hot water of low temperature to the air conditioning heat exchanger 44 installed in the indoor unit CU through the cold and hot water flow passage 47, and by the output of the control device 102. The three-way switching solenoid valve 35 is operated to supply a part or all of the high temperature cooling water to the heat exchanger 45 for the dehumidification operation through the branch cooling water channel 36.

At the time of air conditioning, all of the high temperature cooling water may flow through the branch cooling water channel 36 to the heat exchanger 45 for dehumidification operation, or may flow in both the branch cooling water channel 36 and the cooling water channel 34 downstream of the branch point. . At this time, the flow rate control of the high temperature cooling water to the branch cooling water channel 36 may be provided with a throttle valve in the branch cooling water channel 36 to change the distribution ratio, and intermittently control the three-way switching solenoid valve 35. The distribution ratio between the branch cooling water channel 36 and the cooling water channel 34 may be changed.

As a result, the air-conditioning air cooled in the air conditioning heat exchanger 44 and whose water content is lowered due to condensation is heated in the heat exchanger 45 for dehumidification operation, so that dehumidification air conditioning is not accompanied by a decrease in the blowing temperature. Instead of the three-way switching solenoid valve 35, an on / off valve may be used for each of the branch cooling water flow path 36 and the cooling water flow path 34 downstream of the branch point, or only one branch cooling water flow path 36 may be provided.

At the time of heating operation, the solenoid valve 6 for heating is opened, and the absorption liquid pump P1 is operated.

The high temperature medium absorbed liquid flows into the bottom 43 of the evaporator 4. The cold and hot water in the evaporation coil 41 is heated and supplied to the indoor unit CU through the cold and hot water flow passage 47 by the cold and hot water pump P3 to become a heat source for heating. The medium concentration absorbent liquid in the evaporator 4 enters the absorber 3 side at the connection port of the partition tube 40, and returns to the heating tank 11 by the absorbent liquid pump P1 through the low concentration absorbent liquid passage L3.

In the heating operation, the branch cooling water flow path 36 is closed by the three-way switching solenoid valve 35. As the heating source, other heat sources such as an electric heater may be used in addition to the gas burner (B).

3 shows an air conditioner according to the third embodiment. Cooling tower (CT) in this embodiment Cooling Coil (31) Cooling Coil (51) The cooling water flow path 34 in which the cooling water circulates in the order of the cooling tower CT is a closed circuit in which the cooling water does not open to the atmosphere, unlike the first or second embodiment. The cooling tower CT consists of the water cooling heat exchanger 71 which heat-dissipates cooling water, and the water cooling apparatus 70 for water-cooling the water cooling heat exchanger 71.

The water cooling device 70 is a water dissipation tank 72 of the heat dissipation water installed on the upper side of the water cooling heat exchanger 71, a heat dissipation fan 73 attached to the water cooling heat exchanger 71, and a lower side of the water cooling heat exchanger 71. Drain tank (74) installed in the, consisting of a pumping pipe (60) and a water supply pipe (76) having a pumping pump (P4) for pumping heat radiation water from the drip tank (74) to the water spray tank (72).

During the cooling or dehumidification operation of the air conditioner, the radiant water is sprayed from the water spray tank 72 to the water cooling heat exchanger 71, and part of the air is taken from the water cooling heat exchanger 71 to evaporate to cool the cooling water. Cooling water remaining without evaporation flows into the drip tank 74. The water supply pipe line 60 is connected to the water supply pipe line 76, and the water supply line 76 when the amount of water in the water supply tank 74 is lower than the set level by the water level sensor 77 installed in the water tank tank 74. Water is supplied through. A blower 78 is installed on the side of the water cooling heat exchanger 71 to promote the evaporation of water by the heat radiating fan 73.

In this embodiment, since the cooling water flow path 34 is a closed circuit, the cooling water circuit can be prevented from clogging due to the supply of water, contamination, and the like, as compared with the case of evaporating a portion of the cooling water to self-cool the cooling water. Since it becomes easy to mix a corrosion inhibitor into cooling water, maintenance property can be improved.

4 shows an air conditioner according to the fourth embodiment. In this embodiment, the water cooling device 70 in the third embodiment is omitted, and the air cooling heat exchanger 8 constituting a part of the cooling water flow path 34 and the air cooling heat exchanger 8 are provided. The cooling water is radiated by the blower 81 which supplies cooling air. Also in this embodiment, since the cooling water flow path 34 is a closed circuit, the above-described effects can be obtained and the water cooling device 70 is unnecessary, so that the structure of the cooling tower CT can be simplified. .

Claims (9)

In the regenerator, the low concentration absorption liquid is separated into a high concentration absorption liquid and a refrigerant, and in the evaporator, the refrigerant liquid is sprayed on the evaporation coil through which the cold and hot water as the air-conditioning heat medium flows, and the evaporator is cooled. It is connected to the cooling tower and sprays the absorbent liquid to the cooling coil in which the cooling water for the array flows to absorb the evaporated refrigerant. An air conditioner comprising an absorption refrigeration unit and an indoor unit having an air conditioner heat exchanger and a blower connected to the evaporation coil and circulating the cold and hot water, the downstream side of the air flow generated by the blower with respect to the air conditioner heat exchanger of the air conditioner. The cooling water for array flows from the cooling coil LE is an air conditioner using an absorption refrigeration unit, characterized in that the installation of a heat exchanger for dehumidification operation. The cooling system according to claim 1, wherein the absorption refrigeration apparatus has a condenser having a cooling coil for liquefying the separated refrigerant, and the cooling water comprises: the cooling tower, the cooling coil of the absorber, the cooling coil of the condenser, and the An air conditioner using an absorption refrigeration system, characterized in that for circulating a cooling water flow path connecting the cooling tower. The dehumidification device according to claim 1 or 2, wherein a branch cooling water channel to the heat exchanger for the dehumidification operation is provided in the middle of the cooling water channel connecting the cooling coil and the upstream of the cooling tower. An air conditioner using an absorption type refrigerating device, characterized in that a solenoid valve for operation is installed. The cooling tower of claim 1, wherein the cooling tower includes a water cooling heat exchanger through which cooling water flows, and a water supply means for supplying heat radiation water to the water cooling heat exchanger, and the circulation path of the cooling water is a closed circuit that is not opened to the atmosphere. An air conditioner using an absorption type refrigerating device, characterized in that formed. The cooling tower of claim 1, wherein the cooling tower includes a water cooling heat exchanger through which cooling water flows, and a blower for supplying air for radiating heat to the water cooling heat exchanger, and the cooling water circulation path is formed of a closed circuit which is not opened to the atmosphere. An air conditioner using an absorption refrigeration apparatus, characterized in that. 3. The cooling tower of claim 2, wherein the cooling tower includes a water cooling heat exchanger through which cooling water flows and a water supply means for supplying heat radiation water to the water cooling heat exchanger, and the cooling water circulation path is formed of a closed circuit which is not opened to the atmosphere. An air conditioner using an absorption refrigeration apparatus, characterized in that. 4. The cooling tower of claim 3, wherein the cooling tower includes a water cooling heat exchanger through which cooling water flows and a blower for supplying air for radiating heat to the water cooling heat exchanger, and the cooling water circulation path is formed of a closed circuit which is not opened to the atmosphere. An air conditioner using an absorption refrigeration apparatus, characterized in that. The cooling tower of claim 2, wherein the cooling tower includes a water cooling heat exchanger through which cooling water flows, and a blower for supplying air for radiating heat to the water cooling heat exchanger, and the cooling water circulation path is formed of a closed circuit that is not opened to the atmosphere. An air conditioner using an absorption refrigeration apparatus, characterized in that. 4. The cooling tower of claim 3, wherein the cooling tower includes a water cooling heat exchanger through which cooling water flows and a blower for supplying air for radiating heat to the water cooling heat exchanger, and the cooling water circulation path is formed of a closed circuit which is not opened to the atmosphere. An air conditioner using an absorption refrigeration apparatus, characterized in that.