KR100195471B1 - Absorption type air conditioner - Google Patents

Abstract

[purpose]

Providing absorption type air conditioner which makes the device compact by driving absorption liquid pump and cold / hot water pump by one motor.

[Resolution]

The low concentration absorbent liquid is separated into a high concentration absorbent liquid and a refrigerant in the regenerator, the cold and hot water flowing in the evaporation coil 41 is cooled in the regenerator 4, the refrigerant evaporated in the absorber 3 is absorbed, and the refrigerant is absorbed. An absorption refrigeration apparatus (100) for returning the low-concentrated absorbent liquid to a regenerator by an absorbent liquid pump (P1) installed in the low-concentrated absorbent liquid passage (L3); In the air conditioner consisting of; the indoor unit 200 having a heat exchanger 44 for air conditioning connected to the evaporation coil 41 by a cooling water flow passage 46 having a cold and hot water pump (P3), the absorption liquid pump (P1) and the cold and hot water The pump P3 was composed of a tandem pump T driven by one biaxial motor 6.

Description

Absorption Air Conditioner

1 is a conceptual diagram of a heating and cooling device using the absorption chiller.

2 is a sectional view of a tandem pump.

* Explanation of symbols for main parts of the drawings

1: high temperature regenerator 2: low temperature regenerator

3: Absorber 30: Evaporation and absorption case

31 cooling coil 4: evaporator

40: partition wall 41: evaporation coil

44: heat exchanger for air 46: cold and hot water flow path

47: solenoid valve 5: condenser

51 cooling coil 6: double shaft motor

100: absorption refrigeration apparatus 101: refrigeration body

200: indoor unit CT: cooling tower

P1: Absorption Pump P3: Cold & Hot Water Pump

T: Tandem Pump

[TECHNICAL FIELD OF THE INVENTION]

This invention relates to the absorption type air conditioner which makes aqueous solution, such as lithium bromide, an absorption liquid.

[Prior art]

In the absorption type air conditioner, during the cooling operation, the low concentration absorption liquid is heated and boiled by a burner in the regenerator to generate a high concentration absorption liquid and a refrigerant liquid. The coolant liquid cools the hot and cold water while being sprayed and evaporated inside the evaporator to the evaporating coil in which the hot and hot water, which is the air-conditioning heating medium, flows. The evaporated refrigerant is absorbed by the high concentration absorption liquid while the high concentration absorption liquid is sprayed onto the cooling coil in which the cooling water for arranging the inside of the absorber flows. The cooling water is circulated and cooled by the cooling water pump through the cooling water channel.

The low concentration refrigerant concentrated by absorbing the refrigerant is returned to the regenerator via a low concentration absorption liquid channel provided with an absorption liquid pump. On the other hand, during the heating operation, the low concentration absorption liquid is heated by the burner in the regenerator so that the high temperature steam refrigerant is supplied to the evaporator, and the liquid refrigerant heat-exchanged with the evaporation coil and liquefied by lowering the temperature is returned to the regenerator by the cooling water pump. .

In addition, when the heating operation is performed at a low external temperature, the coolant in the coolant flow path may freeze, and the drain valve provided in the coolant flow path is opened to discharge the coolant. Cold and hot water is circulated to the indoor unit by a cold and hot water pump through the cold and hot water flow path. The indoor unit has an air-conditioning heat exchanger, a blower, and an open / close valve for the cold and hot water flow path, and opens and closes the valve while blowing into the blower to allow the cold and hot water to flow through the air-conditioning heat exchanger, and blows the air-conditioned air exchanged by the heat exchanger into the room.

In this air conditioner, the change in the evaporation amount is detected by a temperature sensor attached to the regenerator in order to adjust the air conditioning capacity according to the increase and decrease of the calorific value in the burner. It is preferable that the control apparatus employ | adopt the thing of the type which is easy to control the increase and decrease of discharge amount so that the temperature of the absorbing liquid in a regenerator may be in the fixed range around 170 degreeC. In addition, since the indoor unit can increase or decrease the amount of air conditioning energy due to the air flow rate of the blower, the temperature and the flow rate of the cold and hot water, it is not necessary to control the flow rate of the cold and hot water most appropriately.

[Problem to Solve Invention]

Since the cooling water pump, the absorption liquid pump, and the cold / hot water pump must be equipped with three pumps, the space required for mounting the pump becomes large, which makes it impossible to compact the air conditioner.

An object of the present invention is to provide an absorbent air conditioner that enables the compactness of the device.

[Means for solving the problem]

The present invention separates the low concentration absorption liquid into the high concentration absorption liquid and the refrigerant liquid in the regenerator, and in the evaporator, the refrigerant liquid is sprayed on the evaporating coil through which the hot and cold water, which is an air-conditioning heating medium, is evaporated, and the cold and hot water is cooled. The high concentration absorption liquid is sprayed on the cooling coil which is connected to the cooling tower by the cooling water flow path which has a cooling water pump, and the inside is arranged to absorb the evaporated refrigerant, and the refrigerant absorbs the low concentration absorption liquid which was made low concentration. Absorption-type refrigerating means for returning the regenerator to the regenerator by an absorption liquid pump installed in a low concentration absorption liquid passage, and a high temperature steam refrigerant from the regenerator to the evaporator, and a liquid refrigerant liquefied by lowering the temperature by heat exchange by the absorption liquid pump. Heating means returned to the regenerator, The air conditioner comprising an air conditioner heat exchanger connected to the evaporative coil by a cooling water flow passage, and an indoor unit having a blower, wherein the absorbent liquid pump and the cold / hot water pump are tandem pumps driven by one biaxial motor.

In the invention according to claim 2, the absorption liquid pump is a cascade pump, and the cold and hot water pump is characterized in that the centrifugal pump.

The invention according to claim 3 is characterized in that both output shafts of the two-axis motor, the absorption liquid pump and the cold and hot water pump are connected by a magnet coupling.

In the invention according to claim 4, the heating means has freezing preventing means for opening the drain valve provided in the cooling water flow passage and draining the cooling water.

[Operation and Effects of the Invention]

In this air conditioner, the absorption liquid pump and the hot and cold water pump are operated by one double shaft motor, thereby reducing the number of parts of the air conditioner and making it compact.

In the configuration of claim 2, the control of the discharge amount of the absorbent liquid is facilitated, and the capability of the indoor unit can be maintained.

In the configuration of claim 3, it is possible to reliably prevent leakage of absorbent liquid or cold and hot water for a long time.

In claim 4, since the cooling water to the cooling water flow path is drained to prevent freezing during the heating operation, the cooling water pump is not a tandem pump, thereby preventing the problem of operating to operate another pump. As a result, the service life of the pump due to idle operation can be prevented.

Embodiment of the Invention

1 shows an air conditioner, which includes an absorption type refrigeration apparatus 100 consisting of a refrigeration body 101 and a cooling tower (CT), as an outdoor unit, and an indoor unit 200. This air conditioner is controlled by the controller 300.

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 an absorber 3 and an evaporator 4, and a condenser 5 is provided above the evaporator 4.

The high temperature regenerator 1 is heated by the gas burner B, and heats the tank 11 for boiling the low concentration absorbing liquid therein, and extends from the top of the heating tank 11 to the upper side of the refrigerant vapor and the refrigerant vapor. It has a medium absorbent liquid separation tank 12 for separating the medium absorbed liquid concentrated by the exotherm. On the outer circumference of the medium concentration absorbing liquid separation tank 12, a longitudinally cylindrical cylindrical airtight refrigerant recovery tank 10 for recovering refrigerant vapor is provided.

The low temperature regenerator (2) has a longitudinally long cylindrical low temperature regenerator case (20) with its center centered to one side on the outer periphery of the refrigerant recovery tank (10). The low temperature regenerator case 20 is provided with a refrigerant vapor outlet 21 on the ceiling, and a top portion thereof is connected to the bottom portion 121 of the medium absorbent liquid separation tank 12 by a medium absorbent liquid flow path L1. It is.

The low temperature regenerator case 20 is supplied with a medium concentration absorption liquid through a heat exchanger H by the pressure difference, and is boiled again using the outer wall of the refrigerant recovery tank 10 as a heat source to separate the refrigerant vapor and the high concentration absorption liquid. The outer periphery of the low temperature regenerator case 20 is provided such that a vertically long cylindrical hermetic evaporation / absorption case 30 has the same center, and the evaporation / absorption case 30 is extended upward and installed on the condenser case ( 50).

The coolant 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 condenser (3) is provided with a cooling coil (31) wound around a vertically long cylindrical cylinder in the inner part of the evaporation and absorption case (30), and for spraying the high concentration absorbing liquid on the cooling coil (31) thereon. 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 arrangement cooled by the cooling tower CT is circulated in the cooling coil 31.

The high concentration absorption liquid receiving part 22 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 absorption liquid spray port 32 is cooled high concentration absorption liquid is introduced by the pressure difference, the introduced high concentration absorption liquid is sprayed on the upper end of the cooling coil 31, attached to the surface of the cooling coil 31 to form a film It flows down by the action of power. The bottom 33 of the absorber 3 and the bottom of the heating tank 11 are connected via a low concentration absorption liquid flow path L3 equipped with a heat exchanger H light absorbing liquid pump P1.

The evaporator 4 is provided with a partition wall 40 having a long vertical cylindrical communication port attached to an outer circumference of the cooling coil 31 in the evaporation / absorption case 30, and an outer circumference of the partition wall 40. The elongated cylindrical evaporation coil 41 in which the cold and hot water for cooling and heating flows is installed in the inside, and the refrigerant | coolant spraying hole 42 is attached to the upper side. The bottom portion 43 of the evaporator 4 communicates with the bottom portion 121 of the medium concentration absorbent liquid separation cylinder 12 by the heating absorbent liquid passage L4 having the heating solenoid valve V1.

The coolant spray hole 42 is used in the cooling operation to drop the coolant liquid onto the evaporation coil 41. The dropped refrigerant cools the surface area of the evaporating coil 41 by the surface encouragement, and becomes a film shape. The refrigerant is evaporated in the airtight container 30 which is in a low pressure state while being dropped downward by the action of gravity. Cools cold and hot water for cooling and heating.

The condenser 5 is used during the cooling operation, and is provided by installing a cooling coil 51 in which the condenser case 50 circulates inside the condenser case 50, and the cooling water for the arrangement cooled in the cooling tower CT is circulated. The condenser case 50 communicates with the bottom portion 14 of the refrigerant recovery tank 10 by the refrigerant passage L5 and also with the low temperature regenerator 2 through the refrigerant vapor outlet 21 and the gap 5A. In both cases, 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 holes 42 provided in the lower part of the condenser 5 and the upper part of the evaporator coil 41 of the evaporator 4 communicate with the coolant liquid supply path L6. The liquefied refrigerant liquid is supplied to the refrigerant liquid spraying port 42 via the refrigerant cooler 52 provided in the refrigerant liquid supply path 6L.

In this embodiment, the cooling coil 31 is connected to the cooling coil 51, and is also connected to the cooling tower CT and the cooling water flow path 34. The cooling water circulation path 34 is equipped with a cooling water pump P2, which is a centrifugal pump, and the cooling water that is absorbed by the cooling coil 31 and the cooling coil 51 and becomes a high temperature is supplied to the cooling tower CT to radiate heat into the atmosphere. An array cycle is formed.

In the cooling operation, the cooling water is circulated in the order of the cooling tower CT → cooling coil 31 → cooling coil 51 → cooling tower CT by the cooling water pump P2. In addition, the absorbent liquid circulates in the order of the high temperature regenerator 1 → the low temperature regenerator 2 → the absorber 3 → the absorbent liquid pump P1 → the high temperature regenerator 1.

The indoor unit 200 has an air conditioning heat exchanger 44 and a blower 45. Both ends of the evaporation coil 41 are connected to the air conditioning heat exchanger 44 by a cold / hot water flow passage 46 made of a rubber hose. A cold / hot water pump (P3) is formed in the cold / hot water flow passage (46) and circulates the cold / hot water in the air conditioning heat exchanger (44). An electronic open / close valve 47 is formed in the cold / hot water flow passage 46 upstream of the air conditioning heat exchanger 44.

At the time of heating operation, the heating electromagnetic valve V1 is opened and the absorption liquid pump P1 is operated. As a result, the high temperature medium absorbed liquid flows from the bottom portion 43 into the evaporator 4. The hot and cold water in the evaporation coil 41 is heated and supplied to the indoor unit 200 through the cold / hot water flow passage 46 by the cold / 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 through the communication port of the partition wall 40, and is returned to the heating tank 11 by the absorbent liquid pump P1 via the low concentration absorbent liquid passage L3. .

In addition, since the external air temperature is low during the heating operation, the cooling water of the cooling water circulation path 34 may freeze in the cold district. For this reason, if there is a heating operation instruction, the control device 300 opens the drain valve 34a to discharge the coolant. When no cooling water is present in the cooling water circulation path 34 when the cooling operation instruction is given, the cooling water is supplied to the cooling water circulation path 34 through the water supply valve 34b. In addition, since there is no cooling water in the cooling water circulation path 34 during the heating operation, the cooling water pump P2 does not operate.

Absorption liquid pump P1 and cold / hot water pump P3 are tandem pumps P driven by both output sides 61 and 62 of one biaxial motor 6, as shown in FIG. Both output sides 61 and 62 and the absorbing liquid pump P1 and the cold / hot water pump P3 are connected by magnet couplings 63 and 64, respectively. Cylindrical joints 65 and 66 are provided on the front end side of both output sides 61 and 62 with a plurality of magnets M arranged side by side on the inner circumference of the cylinder, which is the driving member of the magnet couplings 63 and 64.

Absorption liquid pump P1 is a cascade pump in this embodiment, and the impeller 73 is provided in the pump casing 7 in which the inlet port 71 and the discharge port 72 were formed. In the impeller 73, a cylindrical joint 75, which is a driven side member which is inserted to have the same axis in the cylindrical joint 65 and is arranged in parallel with the magnet M, is provided with a plurality of magnets N arranged side by side in a cylindrical shape. It is connected.

Between the circumferential joint 65 and the circumferential joint 75 is partitioned so that liquid may not permeate by the stainless steel partition 76. The reason why the cascade pump is employed in the absorbent liquid pump P1 is that the discharge amount also increases with the increase in the rotational speed, and is very suitable for the flow rate control of the absorbent liquid. The magnet coupling 63 is used to prevent the absorbing liquid from leaking to the biaxial motor 6 by the partition wall 76. In addition, the partition 76 may use materials other than stainless as long as it is a nonmagnetic material excellent in corrosion resistance and durability.

The hot and cold water pump P3 is a centrifugal pump in this embodiment, and an impeller 83 is provided in the pump casing 8 in which the inlet 81 and the discharge port 82 are formed. The impeller 83 is inserted into the cylindrical joint 66 so as to have the same axis, and a circumferential joint 85 which is a driven side member in which a plurality of magnets N are arranged side by side in a cylindrical shape in correspondence with the magnet M is connected. have. Between the cylindrical joint 66 and the circumferential joint 85, the partition is partitioned so that liquid may not permeate by the relatively cheap resin partition 86.

The tandem pump T rotates by driving the impellers 73 and 83 through the magnet couplings 63 and 64 provided on both output sides 61 and 62 with the rotation of both shaft motors 6. This rotation speed is controlled by the control apparatus 300 according to the output of the temperature sensor 15 which is attached to the heating tank 11 and detects the temperature of the low concentration absorption liquid inside. The magnet coupling 64 is used to prevent the hot and cold water from leaking to the biaxial motor 6 by the partition 86 over a long period of time.

The discharge amount of the absorbent liquid pump P1 is controlled so that the temperature of the low concentration absorbent liquid in the heating tank 11 can maintain a temperature within a predetermined range around 170 ° C. most suitable for boiling. That is, the rotational speed of the biaxial motor 6 is controlled so that the absorption liquid pump P1 discharges necessary for maintaining the temperature.

With the change in the rotational speed of the absorbent liquid pump P1, the rotational speed of the cold / hot water pump P3 also changes, but since the cold / hot water pump P3 is a centrifugal pump, the discharge amount is almost constant with respect to the change in the rotational speed. For this reason, even if the rotational speed of the biaxial motor 6 increases or decreases, the circulation amount of cold / hot water is almost constant. However, since the air conditioning energy amount by the indoor unit 200 can be increased or decreased according to the cold and hot water temperature, the deterioration of the air conditioning capacity is compensated.

In the above embodiment, a burner is used as a heating source, but other heat sources such as an electric heater may be used.

Claims (4)

The low concentration absorption liquid is separated into the high concentration absorption liquid and the refrigerant liquid in the regenerator, and the inside of the regenerator is sprayed and evaporated by spraying the liquid refrigerant on the evaporative coil through which the hot and cold water, which is a heating medium for air conditioning, is cooled. The high concentration absorbing liquid is sprayed on the cooling coils which are connected to the cooling tower by a cooling water flow passage having a pump, and the inside is arranged to absorb the evaporated refrigerant, and the refrigerant absorbs the low concentration. Absorption type refrigeration means for returning the absorbent liquid to the regenerator by an absorbent liquid pump provided in the low concentration absorbent liquid flow path; Heating means for supplying a high temperature steam refrigerant from the regenerator to the evaporator and returning the liquid refrigerant whose temperature has been lowered by heat exchange to the regenerator by the absorption liquid pump; An air conditioner comprising: an air conditioner heat exchanger connected to the evaporative coil by a cooling water flow path having a cold / hot water pump, and an indoor unit having a blower, wherein the absorbent liquid pump and the cold / hot water pump are tandem pumps driven by one biaxial motor. Absorption air conditioner characterized by. The absorption type air conditioner according to claim 1, wherein the absorbing liquid pump is a cascade pump, and the cold / hot water pump is a centrifugal pump. The absorption type air conditioner according to claim 1, wherein both output shafts of the biaxial motor, the absorbing liquid pump, and the cold / hot water pump are connected by a magnet coupling. 4. The absorption type air conditioner according to any one of claims 1 to 3, wherein the heating means has freezing prevention means for draining the cooling water by opening a drain valve installed in the cooling water flow path.