JP3182308B2 - Absorption refrigeration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption apparatus in which a desired heat exchange fluid is cooled and heated by performing a required heat exchange operation by an absorption heat pump operation using an absorption liquid mixed with a refrigerant. The present invention relates to an absorption refrigerator (such as an absorption refrigerator in the present invention) such as a refrigerator or an absorption chiller / heater.

[0002]

2. Description of the Related Art In an apparatus of this type, a fluid having a relatively low temperature as an evaporation temperature, such as NH3, is used.
2. Description of the Related Art Absorption refrigerators that use ammonia as an absorbent and a cheap and harmless fluid having a relatively high evaporation temperature with respect to the refrigerant, for example, a mixture of water are known.

[0003] Further, required heat exchange is performed between a generator for heating the absorbing liquid to evaporate the refrigerant and an absorber for absorbing the refrigerant in the water. Function, ie, a heat exchange function between generator and absorber (Generator-Absorber Heat)
An absorption refrigerator having a configuration for improving heat operation efficiency by providing an exchanger is well known, and the heat exchange function between the generator and the absorber is referred to as a GAX function.

[0004] Regarding the operation and effect of the GAX function, the GAX function is performed by a crossed pipe in which a pipe provided in the absorber and a pipe provided in the absorber are connected in a crossed manner. If the configuration is, for example, ASME, AES, VOL.
8, 1988, p. 98. 2 Gener
ator-Absorber Heat Exchan
ger Unit (hereinafter, referred to as a first prior art).

Further, a specific configuration of such an absorption refrigerator having a GAX function, that is, a configuration as shown in FIGS. 4 and 5 is disclosed in Japanese Patent Application No. Hei.
2 is disclosed in Japanese Patent Laid-Open No. 6-323676 (hereinafter, referred to as a second prior art).

First, in the configuration of FIG. 4, the circulating system of the absorbing liquid will be described starting from the diluted liquid 2b having a low refrigerant concentration accumulated at the bottom of the generator 5.
Due to the pressure difference between the inside and the inside of the absorber 1, the heat exchange tube 205
A → Absorptive liquid heat exchanger 31 → Scattered from scatter pipe 201D via the path of pressure reducer 9, absorbs refrigerant vapor 7c while dripping along heat exchange pipe 201X / heat exchange pipe 201B / cooling pipe 201A. It becomes a concentrated liquid 2 a and accumulates at the bottom of the absorber 1.

The concentrated liquid 2a is pressurized by a pump 3,
The heat exchange tube 201B → the heat exchange tube 205D → the absorbent heat exchanger 31 → the heat exchange tube 201X, and the heat exchange tube 2
01B deprives the heat of the refrigerant vapor 7c and the heat generated when the diluted liquid 2b sprayed from the spray tube 201D absorbs the refrigerant vapor 7c, and then the refrigerant vapor 7a in the heat exchange tube 205D.
After being preheated by passing through the heated side of the absorbent heat exchanger 31,
In the 1X, the heat of the refrigerant vapor 7c and the heat generated when the sprayed diluted liquid 2b absorbs the refrigerant vapor 7c are heated again, and then sprayed from the spray pipe 205C, and then spread along the heat exchange pipe 205A. Some amount of refrigerant vapor 7
After evaporating a, the generator 5 is circulated so as to collect as a dilute solution 2b at the bottom.

[0008] Therefore, the heat exchange pipe 201B and the heat exchange pipe 201X constitute a GAX function part that uses the heat existing on the absorber 1 side to assist the heating required for the generation of the refrigerant vapor in the generator 5. You are doing.

Next, the circulation system of the refrigerant will be described with the refrigerant vapor 7a of the generator 5 as a starting point. The refrigerant vapor 7a generated by heating the rare liquid 2b by the heater 6 contains a large amount of water vapor components. Gas-liquid contact action, that is, heat exchange that occurs when refrigerant vapor contacts the surface of the absorbent,
By increasing the concentration of the refrigerant in the refrigerant vapor 7a, that is, the concentration of NH3, by the action of separation and absorption, and performing a rectifying action of removing the residual heat by the heat exchange tube 205D, and further removing the heat by the heat exchange tube 205E. , A portion of the refrigerant vapor 7a is condensed, that is, a highly concentrated absorbent obtained by condensing a portion of the refrigerant vapor in contact with the heat exchange pipe and the refrigerant vapor 7a
After performing the fractionation effect of gradually increasing the refrigerant concentration in the refrigerant vapor 7a by the gas-liquid contact action with the liquid, the refrigerant is sent to the absorber 1 via the condenser 11, the decompressor 13, and the evaporator 14, and is discharged from the spray pipe 201D. The diluted liquid 2b is absorbed into the concentrated liquid 2a, and merges with the above-described absorbent circulating system to form the spray pipe 20.
Sprayed from 5C, heated by the heater 6 and circulated to become the refrigerant vapor 7a.

Here, the refrigerant vapor 7a that has entered the condenser 11 via the pipe 10 gives heat to a first heat-manipulating fluid 35a, for example, water, which passes through the heated side 11A, radiates heat, and condenses. After having become the refrigerant liquid 7b, a pressure reducer 13
to go into. Each of the decompressors 9 and 13 is configured by, for example, a pressure reducing valve.

Then, the refrigerant liquid 7b depressurized by the decompressor 13
Enters the evaporator 14, passes through the cooled side 14A of the evaporator 14, evaporates by removing heat from water, for example, water, and evaporates to form the refrigerant vapor 7c. Return to the absorber 1, the first heat operation fluid 35a passing through the pipes 20, 21, 22, 23
And the second thermal operation fluid 35b passing through the conduits 24 and 25 is provided with a required thermal operation.

Next, pipes 20, 21, 22, 23, 24
The outdoor heat exchanger 61 in the upper part connected to 25
The circulation system of the first heat operation fluid 35a and the second heat operation fluid 35b circulated by the heat exchanger 62 and the indoor heat exchanger 62 will be described. The outdoor heat exchanger 61 and the indoor heat exchanger 62 The connection switch 63 allows the connection path to be changed, and the pump 64 includes a first heat operation fluid 35 a passing through the heated side 11 A of the condenser 11, for example, a pump for promoting circulation of water, Pump 65 is the evaporator 14
Is a pump for promoting the circulation of the second heat operation fluid 35b, for example, water passing through the cooled side 14A.

The first cooling pipe 201A of the absorber 1
Pipes 20 and 21 for supplying the first heat operation fluid 35a to the heated side 11A of the condenser 11, and second pipes 22 and 23 for the first heat operation fluid 35a of the evaporator 14. And the pipes 24 and 25 that supply the heat-manipulating fluid 35b to the heat-manipulating fluid to be subjected to the desired heating and cooling, for example,
It is configured to supply water for heating / cooling and a fluid for heat absorption / dissipation, for example, water absorbed / dissipated through a radiator with fins.

The pipeline connection switch 63 is a switching valve for switching eight pipelines between a connection route shown by a solid line and a connection route shown by a dotted line, and switches eight pipelines. Also called a valve, the switching operation is performed by operating a switching axis by an electric actuator that operates based on a control signal from the CPU 70.

By the switching connection along the path shown by the solid line, the pipe 20 → the cooling pipe 201A → the pipe 21 → the pipe 22 →
By the circulation path of the heated side 11A of the condenser 11 → the pipe 23 → the pipe connection switch 63 → the outdoor heat exchanger 61 → the pipe connection switch 63 → the return to the pipe 20 via the pump 64, the first
While circulating the thermal operation fluid 35a of the outdoor heat exchanger 61
And a cooling heat radiation path forcibly supplying outdoor air to the heat radiation side 61A with a blower 61B or the like to perform a heat radiation operation, and a line 24 → a cooled side 14A of the evaporator 14 → a line 25 → a line connection switch. Unit 63 → indoor heat exchanger 62 → pipeline connection switch 6
3 → return to the pipeline 24 via the pump 65, while circulating the second heat-manipulating fluid 35b, and circulating air to the cooled side 62A of the indoor heat exchanger 62 by a circulating blower 62B or the like. To form a cooling heat radiation path that forcibly gives
The cooling operation by the heat operation fluid, that is, the circulation mode in the cooling operation is configured.

Further, by the switching connection along the path indicated by the dotted line, the pipe 20 → the cooling pipe 201A → the pipe 21 → the pipe 22
→ Heated side 11A of condenser 11 → Pipe line connection switch 63 →
By the circulation path of the indoor heat exchanger 62 → the pipeline connection switching device 63 → the return to the pipeline 20 via the pump 64, the first heat operation fluid 35a is circulated to the heated side 62A of the indoor heat exchanger 62. A heating radiating path for forcibly supplying room air to heat the room air, and a pipe line 24 → a cooled side 14A of the evaporator 14 → pipe 25 → pipe connection switch 6
3 → Outdoor heat exchanger 61 → Pipe connection switch 63 → Pump 6
5, the outdoor heat exchanger 35 is forcibly supplied with outdoor air by a blower 61B or the like to the heat absorption side 61A of the outdoor heat exchanger 61 while circulating the second heat operation fluid 35b by the circulation path returning to the pipe line 24. By forming the heat absorption path so as to perform the heating operation of the heat operation fluid, that is, a circulation form in a heating operation is configured.

The control of the cooling operation or the heating operation of the heat operation fluid is performed by control signals of the respective parts of the CPU 70. This control is performed by the CPU 7 by detecting the operation state of each required part, for example, a detection signal of each part detecting the temperature and the like, and a setting signal from the setting operation part 80 for setting the operation conditions and the like.
0, and a control signal obtained by performing necessary control processing in the CPU 70, the heater 6, the pipe connection switch 6
3. It is configured to control the operation of each of the pumps 3, 64, 65 and the like.

Next, in the configuration of FIG. 5, a main difference from the configuration of FIG. 4 is that the cooling pipe 201A of the absorber 1 is replaced with a second absorber 207 provided separately from the absorber 1. A heat exchange pipe 207A and a third absorber 217 are provided, and instead of the circulation of the first heat operation fluid 35a passing through the cooling pipe 201A, the refrigerant vapor 7a in the pipe 10 to the refrigerant vapor 7c in the pipe 15 are replaced. In the operation of the cooling operation of the apparatus, for example, in a cooling operation state, the air-cooled third absorber 217 cooled by the outside air makes the line 15 The concentrated liquid 2c obtained by absorbing the refrigerant vapor 7c and the absorbent 2a in the pipe 4A while cooling is supplied to the heat exchange pipe 201X, and at the time of a heating operation of the apparatus, for example, at the time of a heating operation state. Of the second thermal operation fluid 35b Cold by the second absorber 207, via line 15 the refrigerant vapor 7c and the pipe 4C of the absorbent 2a and concentrated solution 2c heat exchange tubes 201X obtained by absorbing with cooling of
Is provided.

In switching the pipeline connection, instead of the pipeline connection switch 63, the pipeline connection switch 6 using two four-way valves is used.
3A and a pipeline connection switch 63B. Then, as shown in the lower part of FIG. 5, the route indicated by the white arrow indicates the route of each fluid when the cooling operation is performed.
In other words, the route is the route in the cooling operation state, the route indicated by the double arrow is the route in the heating operation, that is, the route in the heating operation state, and the route indicated by the black arrow is both routes. This is a common route during operation. Note that CP
The illustration of the U70 and the setting operation unit 80 is omitted.

First, a specific description will be given of the circulating system of the absorbent and the circulating system of the refrigerant in the cooling operation, that is, in the cooling operation state.
Each pipe line is connected by a solid line, and each pump 3
65/210 is operating state, on-off valve 208 is closed state,
The on-off valve 209 is open.

The refrigerant vapor 7a of the generator 5 is supplied to the pipe 1
0 to pipeline connection switch 63B → check valve 211 → condenser 6
1 → check valve 212 → precooling heat exchanger 214 → reservoir 26
0 → pressure reducer 215 → check valve 216 → evaporator 14 → check valve 218 → line switching connector 63B → pre-cooling heat exchanger 214
Heat-receiving side → the path of the pipe 15 where the pipe 15
The refrigerant vapor 7c flows from the pipe 15 to the first absorber 1 via the pipe 15A, the pipe 15 from the pipe 15 to the second absorber 207, and the pipe 15 via the on-off valve 209. Third
, The pipeline 1 going to the absorption heat exchanger 217
5C.

The refrigerant vapor 7c in the pipe 15A is absorbed in the absorber 1 and enters the concentrated liquid 2a. In the configuration of FIG. 5, the concentration of the concentrated liquid 2a is low and the concentration is low because of the absence of the cooling pipe 201A in the case of FIG.

The refrigerant vapor 7c in the pipe 15B is supplied to the absorber 20
7 is in a non-operating state, the refrigerant vapor 7c
A part of the liquid enters the adjusting reservoir 280 via the pipe 4d, becomes the refrigerant vapor 7e, and is absorbed by the concentrated liquid 2c entering from the pipe 4B. In this line 15B, when the absorbing liquid or the refrigerant liquid accumulates in the lower part of the line 15C, the passage of the refrigerant vapor 7c passing from the line 15C to the absorption heat exchanger 217 is blocked by the absorbing liquid or the refrigerant liquid. Therefore, it serves to discharge the absorbing liquid or the refrigerant liquid so as not to accumulate.

The refrigerant vapor 7c in the line 15C is absorbed by the intermediate concentrated liquid 2a entering from the line 4A into the concentrated liquid 2c in the absorption heat exchanger 217, and becomes the concentrated liquid 2c through the line 4B.
to go into. Then, the concentrated liquid 2c is sent to the heat exchange tube 201B by the pump 210, and thereafter performs the same circulation as in the case of FIG.

The absorption heat exchanger 217 and the outdoor heat exchanger 6
1 is arranged in a place where outside air passes, and
B blows the outside air and radiates it to the outside air. In addition, pipe 24
The path of the second thermal operation fluid 35b circulating through the pipe 25 is circulated exactly in the same manner as in FIG. 4 except that the pipe connection is replaced by the pipe connection switch 63A.

Therefore, in the configuration of FIG. 5, in the case of FIG. 4, the first heat operation fluid 35a for cooling passing through the pipes 20, 21, 22 and 23, for example, the refrigerant vapor and Since the absorption liquid is directly air-cooled with the outside air, the temperature of the outside air and the first heat operation fluid 35a
Since there is no heat exchange efficiency between the above temperatures, the cooling efficiency is improved, and the coefficient of performance of the entire apparatus is improved.

Next, a description will be given of a state at the time of an operation of performing a heating operation on the heat operation fluid, that is, a concrete circulation system of the absorbent and a circulation system of the refrigerant in the heating operation state. 63A and 63B are in a connected state indicated by dotted lines, each pump 65 and 210 is in an operating state, the pump 3 is in a stopped state, the on-off valve 208 is in an open state, and the on-off valve 20
9 is in a closed state.

The difference between the circulation path of the absorbing liquid and the circulation path of the refrigerant when the cooling operation is performed, that is, when the cooling operation is performed will be described. The pump 3 is stopped, and the on-off valve 209 is operated. Since the circuit is closed, the absorption heat exchanger 217 stops absorbing, and the on-off valve 208 is open, so that the second absorber 207 performs absorption.

The refrigerant vapor 7a of the generator 5 is supplied from the pipe 10 to the pipe connection switch 63B → the check valve 219 → the evaporator 14 → the check valve 220 → the pre-cooling heat exchanger 214 → the liquid reservoir 260 → the pressure reducer. 221 → check valve 222 → outdoor heat exchanger 61 → check valve 213 → pipeline switching connector 63B → precooling heat exchanger 214
After passing through the path from the heat-absorbing side to the pipe 15, the path that enters the first absorber 1 via the pipe 15A and the pipe 15B
And into a path to enter the second absorber 207 via

The spray tube 207B of the second absorber 207 is
The concentrated liquid 2a provided through the on-off valve 208 is
07A, so that concentrated solution 2a
Absorbs the refrigerant vapor 7d and becomes the concentrated liquid 2c, which accumulates at the bottom of the adjusting liquid reservoir 280.

The adjusting reservoir 280 and the reservoir 260 are
Absorbent generated due to a difference in the absorption concentration of the absorbent between the operation of the cooling operation, that is, the operation of the cooling operation, and the operation of the heating operation, that is, the operation of the heating operation. By storing the amount of change, that is, the volume ratio between the concentrated liquid 2c and the refrigerant vapor 7e is changed in the adjusting liquid reservoir 280, and the volume ratio between the refrigerant liquid 2f and the refrigerant vapor 7b is changed in the liquid reservoir 260. Is changed to prevent idling of the pump 210, and serves to keep the refrigerant circulation amount substantially uniform.

The path of the second heat operation fluid 35b circulating in the pipes 24 and 25 is circulated through the heat exchange pipe 207A via the pipe connection switch 63A. That is, the circulation is performed with the cooling pipe 201A in the case of FIG. 4 replaced with the heat exchange pipe 207A. Therefore, the second absorber 207 is liquid-cooled because it is absorbed and cooled by the second heat operation fluid 35b.

[0033]

The first prior art described above
In the configuration of the second prior art, the outside air temperature is directly controlled for both heat exchange for heat radiation of the heat working fluid through the cooling pipe of the absorber and heat exchange for condensation or evaporation of the refrigerant vapor. Therefore, there is a disadvantage that the coefficient of performance of the entire apparatus cannot be sufficiently improved.

When frost is formed on the heat exchange function part which directly exchanges heat with the outside air during the heating operation, that is, during the heating operation, temporarily during the cooling operation, that is, during the cooling operation. Since the defrosting operation that switches to the same operation state as that described above is performed, the circulation system and the refrigerant circulation system of the thermal operation fluid for cooling the indoor air are simultaneously cooled, so when returning to the heating operation, Undesirable heat loss increases, for example, a relatively long heating time is required to return to the normal heating operation state, and the coefficient of performance of the entire apparatus is extremely reduced.

For this reason, there is a problem that it is desired to provide an absorption refrigeration apparatus free from such inconveniences.

[0036]

An absorbing liquid circulating system for circulating the absorbing liquid through the absorbing function for absorbing the refrigerant vapor into the absorbing liquid as described above, and a generating function for evaporating the refrigerant vapor from the absorbing liquid. And a refrigerant circulating system that circulates the refrigerant through a condensing function part that condenses the evaporated refrigerant vapor to obtain a condensed refrigerant and an evaporating function part that evaporates the condensed refrigerant and obtains a refrigerant vapor, In an absorption refrigeration system that cools or heats indoor air by a refrigerant circulation system.

During the above-mentioned cooling, it operates as the above-mentioned condensing function part, and during the above-mentioned heating, the heat exchange of the heat exchanging function part which operates as the above-mentioned evaporating function part is performed directly with the outside air. Means for heat exchange between the refrigerant and the outside air performed by heat exchange.

A heat-exchange fluid outside-air heat exchange means for performing heat exchange by direct heat exchange with the outside air for cooling the heat-operation fluid for cooling the absorption function portion during the above-mentioned cooling. And the configuration of 1.

In addition to the first configuration, an indoor cooling means for cooling the indoor air based on heat exchange of the heat exchange function part operating as the evaporation function part during the cooling is provided. 2. The configuration of 2.

In addition to the above-described first configuration, a third configuration in which indoor means for heating the interior based on heat exchange between the thermal operation fluid and the indoor air is provided.

In the absorption refrigerating apparatus similar to the above-mentioned first configuration, the apparatus operates as the condensing function during the cooling, and operates as the evaporating function during the heating. Means for exchanging heat between the refrigerant and the outside air, wherein the heat exchange of the first heat exchange function portion is performed by direct heat exchange with the outside air.

During the above-mentioned cooling, the heat exchange of the second heat exchange function part for cooling the thermal operation fluid for cooling the absorption function part is performed by direct heat exchange with the outside air. Heat exchange means;

Indoor means for heating the interior of the room based on heat exchange between the thermal operation fluid and the indoor air;

Parallel heat exchange arranging means for arranging the first heat exchange function part and the second heat exchange function part adjacent to each other in parallel;

During the above-mentioned heating, a part of the above-mentioned heat operation fluid is circulated to the above-mentioned second heat exchange function part, so that the above-mentioned first heat exchanger is defrosted. A fourth configuration in which means are provided.

Instead of the defrosting means in the fourth configuration, the cooling of the room air is performed based on the heat exchange of the third heat exchange function part which operates as the evaporation function part during the cooling. Means for performing indoor cooling;

[0047] During the heating, the third heat exchange function is operated as the evaporation function and the first heat exchange function is operated as the condensation function. Accordingly, a fifth configuration in which a defrosting unit for defrosting the first heat exchange function portion is provided.

In place of the defrosting means in the fourth configuration, the cooling of the room air is performed based on the heat exchange of the third heat exchange function portion which operates as the evaporation function portion during the cooling. And indoor cooling means for performing.

During the above-mentioned heating, a part of the above-mentioned heat-manipulating fluid is circulated to the above-mentioned second heat-exchange function part, whereby the first heat-exchange function part is defrosted. 1 defrosting means;

During the heating, the third heat exchange function is operated as the evaporation function, and the first heat exchange function is operated as the condensation function. And a second defrosting means for defrosting the first heat exchange function portion.

According to a sixth aspect, there is provided a defrost selecting means for selecting one of the first defrost means and the second defrost means based on the state of the outside air. This is to solve the problem.

[0052]

According to the first, second and third configurations, heat exchange for condensing refrigerant vapor and for evaporating refrigerant is performed by direct heat exchange with the outside air. Because the heat exchange for cooling the heat-operating fluid for cooling the absorption function part is performed by direct heat exchange with the outside air, the outside air temperature can be directly used in both of these heat exchanges, so the coefficient of performance of the entire system Acts so as to be greatly improved as compared with the related art.

Further, according to the fourth configuration, during the defrosting operation, that is, during the defrosting operation, the first heat operation fluid heated when cooling the absorption function part is temporarily transferred to the second defrosting operation. This heat is transmitted to the adjacent first heat exchanger to remove frost from the first heat exchanger. During this time, the refrigerant circulation system performs the heating operation. Since the state is maintained, the heating operation, that is, when returning to the heating operation, it is possible to quickly shift to the complete heating operation state, so that the decrease in the coefficient of performance of the entire apparatus can be slightly suppressed. I do.

Further, according to the fifth configuration, during the defrosting operation, the first heat exchange function part is heated to form a frost formation in order to perform a cooling operation of the refrigerant circulation system, that is, a cooling operation state. Is removed, but during this time, the circulating system of the thermal operation fluid for heating the indoor air maintains the heating operation state,
When the operation is returned to the heating operation, that is, the heating operation, the heating operation can be relatively quickly shifted to the complete heating operation state, so that a decrease in the coefficient of performance of the entire apparatus can be suppressed.

According to the sixth configuration, one of the defrosting according to the fourth configuration and the defrosting according to the fifth configuration can be selected and defrosted based on the state of the outside air. For example, when the outside air temperature is equal to or higher than a predetermined value, for example, 0 ° C., the defrosting by the fourth configuration can be performed, and when the outside air temperature is lower than the predetermined value, the defrosting by the fifth configuration can be selected. It acts so that the decrease in the observed coefficient of performance can be suppressed in accordance with the outside air condition.

[0056]

An embodiment will be described below with reference to FIGS.
In FIGS. 1 to 3, portions denoted by the same reference numerals as those in FIGS. 4 and 5 are portions having the same functions as the portions denoted by the same reference numerals described with reference to FIGS. 4 and 5, and in FIGS. The portions indicated by the same reference numerals as those in FIG. 1 have the same functions as the portions denoted by the same reference numerals described with reference to FIG.

The difference between the configuration of FIG. 1 and the configuration of FIG.
The first is a point where the configuration of the GAX functional portion is simplified by eliminating the heat exchange tube 201B in the circulation path, and the second is the absence of the heat exchange pipe 205E in the circulation path of the first heat operation fluid 35a. This is a simplified part without providing a structure for performing the fractionation function in the generator 5.

Third, the heat exchangers constituting the condenser 11 and the evaporator 14 are cooled by the pipe connection switch 63B by the four-way valve during the cooling operation, that is, during the heating operation. At the time of the temperature operation, that is, at the time of the heating operation, the refrigerant circulation system is configured to perform operations opposite to each other.
Is a condensing / evaporating heat exchanger 11 ', and a part of the evaporator 14 is an evaporating / condensing heat exchanger 14', which has a configuration similar to the configuration in FIG.

Fourth, the condensation / evaporation heat exchanger 1
By arranging 1 ′ in parallel with and adjacent to the outdoor heat exchanger 61 for radiating the first heat operation fluid 35a, heat is generated between the condensation / evaporation heat exchanger 11 ′ and the outdoor heat exchanger 61. It is a part configured to be replaced.

Fifth, the first heat operation fluid 35a
During the cooling operation, that is, during the cooling operation, the on-off valve 301C and the on-off valve 301D are opened, and the outdoor heat exchanger 6 is opened.
1, the opening / closing valve 301A and the opening / closing valve 301B are opened at the time of the heating operation, that is, at the time of the heating operation, so as to join the flow of the second heat operation fluid 35b.

Sixth, a shelf-like overhanging member 205F, 205G, 205H is provided inside the generator 5 to meander the rising path of the refrigerant vapor 7a, thereby providing the functions of evaporation and rectification. This is a portion where the path of the portion is configured to be long.

[First Embodiment] The configuration of the first embodiment will be described below with reference to FIG. In FIG. 1, on-off valve 301A
The on-off valve 301B is closed during the cooling operation, and is opened during the heating operation.

The on-off valve 301C and the on-off valve 301D are open during the cooling operation and closed during the heating operation.
The pump 3 and the pump 65 are in an operating state during both the cooling operation and the heating operation. The pump 64 is in the operating state during the cooling operation, and is in the stopped state during the heating operation.

The pipeline connection switch 63B is in the path state indicated by the solid line during the cooling operation, and is in the path state indicated by the dotted line during the heating operation. These on-off valves 301A and 301A
The control of the operation states of the pumps B, 301C, 301D, the pumps 3, 64, 65, and the line connection switch 63B are controlled by the CPU 70, and the respective circulation systems operate as follows.

The circulating system of the absorbing solution is as follows: the dilute solution 2b at the bottom of the generator 5 → the heat exchange tube 205A → the line 16 → the heat exchanger 31 → the decompressor 9 → the line 18 → the spraying tube 201D → the concentrated solution 2b → Pipe line 4
→ Pump 3 → Pipe 17 → Heat exchange pipe 205D → Pipe 8 → Heat exchange pipe 201X → Pipe 202 → Heat side 31A of heat exchanger 31 → Circulate the path returning to dilute solution 2b via spray pipe 205F. .

During the cooling operation, that is, during the cooling operation, the refrigerant circulation system is configured such that the refrigerant vapor 7a in the generator 5 → the line 10 → the line connection switch 63B → the condensing / evaporating heat exchanger 11 ′ → the preheating. Heat exchanger 214 → decompressor 215 → check valve 216 → evaporation / condensation heat exchanger 14 ′ → heated side 214A of preheat heat exchanger 214 → line connection switch 63B → line 15 → absorber 1 Concentrated liquid 2a absorbed by the dilute liquid 2a through the refrigerant vapor 7c
Take the route to enter.

Then, during the heating operation, that is, during the heating operation, the refrigerant vapor 7a in the generator 5 → the line 10 → the line connection switching device 63B → the check valve 220 → the evaporating / condensing heat exchanger 14 ′.
→ pressure reducer 221 → check valve 222 → condensation / evaporation heat exchanger 1
1 ′ → pipe connection switch 63B → pipe 15 → takes a path that is absorbed by the dilute liquid 2a via the refrigerant vapor 7c in the absorber 1 and enters the concentrated liquid 2a.

During the operation of the refrigerant, the circulating system of the first heat-manipulating fluid 35a includes a cooling pipe 201A, a pipe 21 and an on-off valve 301C.
→ Outdoor heat exchanger 61 → Pipe line 20A → Pump 64 → Open / close valve 301D → Return to cooling pipe 201A via Pipe line 20.

During the heating operation, the cooling pipe 201A →
Pipe 21 → on-off valve 301B → merges with second thermal operation fluid 35b in pipe 25 → indoor heat exchanger 62 → pump 65 → pipe 24 → on-off valve 301A → cooling pipe 201A via pipe 20
However, the flow branched from the pipe 24 on the way joins the pipe 25 via the heated side 14A 'of the heat exchanger 14'.

During the cooling operation, the circulation system of the second heat-manipulating fluid 35b is arranged such that the indoor heat exchanger 61 → the pump 65 → the line 24 →
The cooled side 14A 'of the heat exchanger 14' returns to the indoor heat exchanger 61 via the pipe 25. Then, at the time of the heating operation, it circulates together with the first heat operation fluid 35a.

The structure of the first embodiment can be summarized as follows: an absorption function part for absorbing the refrigerant vapor 7c into the absorption liquid 2a, for example, an absorption liquid circulating system for circulating the absorption liquids 2a and 2b through the absorber 1 or the like. A generating function part for evaporating the refrigerant vapor 7a from the absorbing liquid 2a, for example, a condensing function part for condensing the generator 5 and the evaporated refrigerant vapor 7a to obtain a condensed refrigerant;
For example, a condenser 11 and an evaporating function part that evaporates the condensed refrigerant to obtain refrigerant vapor, for example, a refrigerant circulation system that circulates the refrigerant through the evaporator 14 and the like are provided. For example, in the absorption refrigeration apparatus 100 that cools or heats via the indoor heat exchanger 62,

During the above-mentioned cooling, it operates as the above-mentioned condensing function, and during the above-mentioned heating, it operates as the above-mentioned evaporating function, for example, the condensing / evaporating heat exchanger 11. ′ Means for performing a heat exchange between the refrigerant and the outside air by direct heat exchange with the outside air;

During the above-mentioned cooling, heat exchange for cooling the above-mentioned absorption function part, that is, the heat-manipulating fluid 35a for cooling the absorber 1, for example, heat exchange by the outdoor heat exchanger 61 is performed directly with the outside air. A first configuration in which a heat-exchange fluid external air-to-air heat exchange unit that performs a thermal exchange is provided;

In addition to the first configuration, a heat exchange function part which operates as the above-mentioned evaporation function part during the above-mentioned cooling,
For example, based on the heat exchange of the evaporating / condensing heat exchanger 14 ', for example, a second configuration in which the indoor heat exchanger 62 is provided with the indoor cooling means for cooling the indoor air,

In addition to the first configuration, the interior of the room is heated based on the heat exchange between the thermally operated fluid 35a and the indoor air, for example, the heat exchange by the indoor heat exchanger 62. This constitutes the third configuration in which the indoor means is provided.

[Second Embodiment] A second embodiment will be described below with reference to FIG. In the configuration of the second embodiment, a different point from the configuration of the first embodiment is that a control program for performing the following control is stored in a processing memory (not shown) of the CPU 70, and the processing of the control program is performed. It is a portion configured to perform a defrosting operation, that is, a defrosting operation by a flow.

The defrosting operation is controlled based on the conditions corresponding to the condensation / evaporation heat exchanger 11 'and the state of the outside air during the heating operation. As a first method, the outside air temperature is equal to or lower than a predetermined value, for example, After a predetermined time elapses at 3 ° C or less, for example,
Each time, as a second method, the temperature of the pipeline in the condensation / evaporation heat exchanger 11 'is equal to or lower than a predetermined value, for example, -1 °.
C or less, every time a predetermined time elapses, for example, every 30 minutes, as a third method, the temperature of the outside air sent to the condensation / evaporation heat exchanger 11 ′ and the temperature of the outside air condensed /
When the temperature difference from the temperature discharged through the evaporating heat exchanger 11 ′ is equal to or less than a predetermined value, for example, 1 ° C. or less, and every time a condition similar to these conditions is detected, a predetermined time, for example, A control processing program for shifting to the defrosting operation for 5 minutes or until the above-mentioned predetermined conditions are resolved is stored in the processing memory, and only during the defrosting operation, in addition to the state of the heating operation, temporarily , On-off valve 301C and on-off valve 3
01D and the circulating system of the first thermal operation fluid 35a is controlled so that the pump 64 is operated.

Therefore, in the defrosting operation state, the circulating system of the first heat operation fluid 35a branches and flows also to the outdoor heat exchanger 61 side, so that the absorption function part, that is, the inside of the absorber 1 is cooled. The outdoor heat exchanger 61 is heated by the first heat operation fluid 35a that has been heated.

Since the outdoor heat exchanger 61 and the condensation / evaporation heat exchanger 11 'are arranged adjacent to each other in parallel,
Since the heat of the outside air heated by the heat radiation of the outdoor heat exchanger 61 is transferred to the condensation / evaporation heat exchanger 11 ′ by heat conduction,
Defrosting of the condensation / evaporation heat exchanger 11 'will be removed.

In addition, since the heat fins of the outdoor heat exchanger 61 and the condensation / evaporation heat exchanger 11 'are integrally formed, heat conduction by the heat fins is added in addition to heat conduction by the outside air. Therefore, defrosting can be performed more effectively.

On the other hand, even during this defrosting operation, the heated first heat operation fluid 35a is supplied to the indoor heat exchanger 62.
Is circulating, so that the heating of the room air is continued without interruption.

[Third Embodiment] A third embodiment will be described below with reference to FIG. In the configuration of the third embodiment, the different points from the second embodiment are not provided with the control of the circulation system which is controlled only at the time of the defrosting operation performed in the second embodiment.
Only at the time of the defrosting operation, only the pipeline connection switch 63B is temporarily switched to the state of the path showing the pipeline connection by the solid line, that is, the refrigerant is circulated by switching to the same path state as the path at the time of the cooling operation. This is where the refrigerant circulation system is controlled.

Therefore, in the defrosting operation state, the condensing / evaporating heat exchanger 11 'is heated by the heat radiation when condensing the refrigerant vapor, so that the frost on the condensing / evaporating heat exchanger 11' is removed. Will be done.

In addition, since the heat fins of the outdoor heat exchanger 61 and the condensation / evaporation heat exchanger 11 'are integrally formed, heat conduction by the heat fins is added in addition to heat conduction by the outside air. Therefore, defrosting can be performed more effectively than in the case of the second embodiment.

On the other hand, even during this defrosting operation, the heated first heat operation fluid 35a is supplied to the indoor heat exchanger 62.
Circulates, so that the heating of the indoor air is continued without interruption, but the circulation of the refrigerant circulation system is reversed, and the cooling / condensing heat exchanger 14 'is cooled. 14A ', the first thermal operation fluid 35a and the second
Is cooled, and the temperature of the first heat operation fluid 35a is reduced by the amount of the cooling. As a result, the heating of the indoor air is reduced by the reduced amount. Become.

[Fourth Embodiment] A fourth embodiment will be described below with reference to FIG. The configuration of the fourth embodiment, and the second and third embodiments
The different points from the embodiment are the following.

First, a first defrosting operation configuration for controlling the circulating system of the first heat operated fluid 35a during the defrosting operation in the same manner as in the second embodiment, and a circulation path of the refrigerant circulating system are described. This is the point where both the second defrosting operation configuration that controls in the same manner as in the third embodiment and the configuration for selecting one of them are provided in the CPU 70.

Secondly, the structure for controlling the defrosting operation time in the second and third embodiments is not provided. Instead, the defrosting state of the condensation / evaporation heat exchanger 11 'and the outside air A frost sensor for detecting the temperature is provided, for example, by the temperature detected by two temperature detecting thermistors provided at the outside air location and the frost formation location, and the change state of these two detected temperatures, and the outside air temperature and the heat radiation fin. Temperature, and when the outside air temperature is equal to or higher than the first predetermined temperature T1, for example, 0 ° C. or higher, the first defrosting operation configuration is selected, and the outside air temperature is set to the first predetermined temperature T1. If the temperature is less than 0 ° C., for example, the defrosting operation is selectively switched so that the second defrosting operation configuration is selected, and the radiation fin temperature is equal to or lower than a second predetermined temperature T2, for example, If the temperature drops below -3 ° C, start defrosting operation When the heat release fin temperature is equal to or higher than the third predetermined temperature T3, for example, 5 ° C. or higher, the CPU 70 is provided with a switching control to stop the defrosting operation and switch to the heating operation. is there.

Therefore, when the outside air temperature reaches the first predetermined temperature T
In the case of 1 or more, the same defrosting operation as in the above-described second embodiment is performed, and when the outside air temperature is lower than the first predetermined temperature T1, the same defrosting operation as in the above-described third embodiment is performed. The operation will be performed to perform the defrosting operation.

To summarize the structure of the second embodiment, in the absorption refrigeration apparatus 100 similar to the first structure,

A first heat exchange function part which operates as the condensing function during the cooling and operates as the evaporating function during the heating, for example, a condensing / evaporating heat A refrigerant-external air heat exchange means for performing heat exchange of the exchanger 11 ′ by direct heat exchange with external air;

During the above-mentioned cooling, the above-mentioned absorption function part, for example, the second heat exchange function part for cooling the thermal operation fluid 35a for cooling the absorber 1, for example, the outdoor heat exchanger 6
(1) a cooling fluid outside air heat exchange means for performing the heat exchange by direct heat exchange with the outside air; The heat exchange between the above-mentioned thermal operation fluid 35a and the above-mentioned indoor air, for example, the indoor heat exchanger 62
Indoor means for heating the room based on the heat exchange of

The first exchange function part, that is, the condensation / evaporation heat exchanger 11 ′, and the second heat exchange function part, that is, the outdoor heat exchanger 61, are arranged adjacent to each other in parallel. Parallel heat exchange arrangement means;

During the above-mentioned heating, the above-mentioned thermally operated fluid 35
a is circulated to the second heat exchange function part, that is, the outdoor heat exchanger 61, thereby defrosting the first heat exchanger, that is, the condensation / evaporation heat exchanger 11 '. And a defrosting means for performing the defrosting.

To summarize the structure of the third embodiment, the third heat exchange function which operates as the evaporating function during the cooling, instead of the defrosting means in the fourth structure. A room cooling means for cooling the room air by means of, for example, the indoor heat exchanger 62 based on heat exchange of a part, for example, the evaporation / condensation heat exchanger 14 ';

During the heating, the third heat exchange function part, that is, the evaporating / condensing heat exchanger 14 'is operated as the evaporation function part and the first heat exchange function is operated. By operating the part, ie, the condensation / evaporation heat exchanger 11 ′, as the above-mentioned condensation function part, the first heat exchange function part, ie, the condensation / evaporation heat exchanger 1
This constitutes a fifth configuration in which defrosting means for defrosting 1 'is provided.

Further, the configuration of the fourth embodiment can be summarized as follows. Instead of the defrosting means in the fourth configuration, the third functioning as the evaporating function part during the cooling is provided.
Heat exchange function part, for example, evaporating / condensing heat exchanger 14 '
Indoor cooling means for cooling the indoor air by the indoor heat exchanger 62 based on the heat exchange of, for example,

During the above-mentioned heating, the above-mentioned heat-operated fluid 35
a is circulated to the second heat exchange function part, that is, the outdoor heat exchanger 61, thereby removing the first heat exchange function part, that is, the condensation / evaporation heat exchanger 11 '. First defrosting means for performing frost;

During the heating, the third heat exchange function part, that is, the evaporating / condensing heat exchanger 14 'is operated as the evaporating function part and the first heat exchange function is performed. By operating the part, ie, the condensation / evaporation heat exchanger 11 ′, as the above-mentioned condensation function part, the first heat exchange function part, ie, the condensation / evaporation heat exchanger 1
Second defrosting means for performing 1 'defrosting,

On the basis of the state of the outside air, for example,
If the outside air temperature is equal to or higher than the first predetermined temperature T1, the defrosting operation by the first defrosting means is selected, and the outside air temperature is set to the first temperature.
When the temperature is lower than the predetermined temperature T1, for example, the selection is switched by the CPU 70 so as to select the defrosting operation by the second defrosting means, so that the first defrosting means or the second defrosting means is selected. And a defrosting selecting means for selecting one of the defrosting means.

[Modification] The present invention includes the following modifications.

(1) The pump 64 and the on-off valve 301D in the configuration of FIG.
It is relocated to a location before the first branch location, and the on-off valve 301D is removed. In the case of this configuration, the pump 64 is operated, as necessary, during both the cooling operation, that is, the cooling operation, and the heating operation, that is, the heating operation.

(2) As shown in FIG. 3, the first to sixth GAX function parts, that is, the absorption refrigeration apparatus 100 having no function part for exchanging heat between the absorber 1 and the generator 5 are provided. Configure by applying the configuration.

(3) The GAX function is configured by applying the first to sixth configurations to the absorption refrigeration system 100 configured as shown in FIG.

(4) In the configuration of (2) or (3),
Similarly to the above configuration (1), the pump 64 is moved to a position before the branch point of the pipe line 21 and the on-off valve 30 is opened.
It is configured by removing 1D. In the case of this configuration, if necessary, the pump 64 is in a cooling operation, that is, in a cooling operation,
The operation state is set during both the heating operation, that is, the heating operation.

(5) In the configuration of the fourth embodiment, the configuration of the portion for controlling the defrosting operation at a predetermined temperature T2 or lower and the predetermined temperature T3 is changed to the case where the predetermined time TA of the heating operation in the third embodiment elapses. The defrosting operation is changed to a configuration in which the defrosting operation is performed for a predetermined short time TB.

(6) The channel opening / closing operation by the on-off valves 301A, 301B, 301C, and 301D in the configuration shown in FIGS. 1, 2, and 3 is similar to that of the three-way or four-way valve. Alternatively, the configuration is changed so that the opening / closing operation can be performed, or the switching configuration of the flow path by the pipeline connection switching device 63B is changed so that the same pipeline connection operation can be performed by the configuration using the opening / closing valve or the three-way valve. And configure.

[0108]

According to the present invention, as described above, the heat exchange function for condensing the refrigerant vapor during the cooling operation and evaporating the refrigerant during the heating operation, and the cooling of the heat-operating fluid for cooling the absorption function. Since both the heat exchange function part and the heat exchange function part are performed by direct heat exchange with the outside air, the outside air temperature can be used directly as it is in both heat exchanges. It can be greatly improved.

Further, in the first defrosting operation configuration, during the defrosting operation, a heat exchanger for temporarily circulating the heated heat-operating fluid for cooling when cooling the absorption function portion is used. Since the frost is removed by transmitting the temperature to the heat exchange function portion that evaporates the refrigerant during the heating operation, the refrigerant circulation system can maintain the heating operation state even during the defrost operation, When the operation is returned to the heating operation, the state can be immediately shifted to the complete heating operation state, so that a decrease in the coefficient of performance as a whole of the apparatus can be slightly suppressed.

Further, in the second defrosting operation configuration, since the refrigerant circulation system is temporarily set in the cooling operation state during the defrosting operation, the heat exchange function for evaporating the refrigerant during the heating operation is temporarily stopped. Since the frost is removed by the heating, the circulating system of the heat operation fluid for heating the indoor air can be maintained in the heating operation state even during the defrosting operation. Since it is possible to promptly shift to the complete heating operation state, a decrease in the coefficient of performance of the entire apparatus can be suppressed to a small extent.

Since one of the first and second defrosting operation configurations is selectively operated in accordance with the state of the outside air, a defrosting operation suitable for the outside air condition can be performed. Another advantage is that a decrease in the coefficient of performance of the entire apparatus can be suppressed in accordance with the outside air condition.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention, and FIGS.
FIG. 5 shows the prior art, and the contents of each figure are as follows.

FIG. 1 is a block diagram showing the overall configuration.

FIG. 2 is a block diagram showing the overall configuration.

FIG. 3 is a block diagram showing the overall configuration;

FIG. 4 is a block diagram showing the overall configuration;

FIG. 5 is a block diagram showing the overall configuration;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Absorber 1A Cooling pipe 2a Concentrated liquid 2b Dilute liquid 2c Concentrated liquid 2f Refrigerant liquid 3 Pump 4 Pipe line 4A Pipe line 4B Pipe line 4C Pipe line 4D Pipe line 4d Pipe line 5 Generator 6 Heater 7a Refrigerant vapor 7b Refrigerant vapor 7c Refrigerant vapor 7d Refrigerant vapor 7e Refrigerant vapor 8 Pipe line 9 Pressure reducer 10 Pipe line 11 Condenser 11A Heated side 12 Pipe line 13 Pressure reducer 14 Evaporator 14A Cooled side 15 Pipe line 15A Pipe line 15B Pipe line 15C Pipe line 17 Pipeline 18 Pipeline 20 Pipeline 20A Pipeline 21 Pipeline 22 Pipeline 23 Pipeline 24 Pipeline 25 Pipeline 31 Absorbent Liquid Heat Exchanger 31A Heated Side 35a First Thermally Operated Fluid 35b Second Thermally Operated Fluid 61 Outdoor heat exchanger 61A Radiation side 61B Blower 62 Indoor heat exchanger 62A Cooling / cooled / heating / heated 63 Pipe connection switch 63A Pipe connection switch 63 B Pipe connection switch 64 Pump 65 Pump 70 CPU 80 Setting operation unit 100 Absorption refrigeration system 201A Cooling pipe 201B Heat exchange pipe 201D Spray pipe 201X Auxiliary heat exchange pipe 202 Pipe 205A Heat exchange pipe 205C Scatter pipe 205D Heat exchange Tube 205E heat exchange tube 205F shelf-like partition 205G shelf-like partition 205H shelf-like partition 206 rectification unit 207 second absorber 207A heat exchange tube 207B distribution tube 208 on-off valve 209 on-off valve 210 pump 211 check valve 212 Check valve 213 Check valve 214 Pre-cooling heat exchanger 214A Heat absorption side 215 Pressure reducer 216 Check valve 217 Absorption heat exchanger / third absorber 218 Check valve 219 Check valve 220 Check valve 221 Depressurization 222 222 Check valve 260 Liquid reservoir 280 Adjustment liquid reservoir 301A Open / close valve 301B On-off valve 301C On-off valve 301D On-off valve

──────────────────────────────────────────────────の Continued on the front page (72) Tomohiko Kato 2-5-5 Keihanhondori, Moriguchi City, Osaka Prefecture Inside Sanyo Electric Co., Ltd. (72) Kazuhiko Harima 2-5-5 Keihanhondori, Moriguchi City, Osaka Prefecture No. 5 Sanyo Electric Co., Ltd. (56) References JP-A-57-104062 (JP, A) JP-A-6-201212 (JP, A) JP-A-6-94322 (JP, A) JP-A Sho57 −166454 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 15/00 301 F25B 30/04 510

Claims (2)

(57) [Claims] An absorbing liquid circulating system for circulating the absorbing liquid through an absorbing function part for absorbing the refrigerant vapor into the absorbing liquid; a generating function part for evaporating the refrigerant vapor from the absorbing liquid; and the evaporated refrigerant. A refrigerant circulating system that circulates refrigerant through a condensing function part that obtains condensed refrigerant by condensing vapor and an evaporating function part that evaporates the condensed refrigerant and obtains refrigerant vapor is provided. An absorption refrigeration unit that cools or heats the first heat exchange function part, which operates as the condensation function part during the cooling and operates as the evaporation function part during the heating. Heat exchange means between the refrigerant and the outside air for performing heat exchange by direct heat exchange with the outside air, and heat of the second heat exchange function part for cooling the heat operation fluid for cooling the absorption function part during the cooling. Exchange with outside air A cooling fluid external air-to-air heat exchange unit that performs direct heat exchange, an indoor unit that heats the interior of the room based on heat exchange between the thermal operation fluid and the indoor air, and the first heat exchange function part And a parallel heat exchange arranging means for arranging the second heat exchange function part in parallel and adjacent to each other, and based on heat exchange of the third heat exchange function part operating as the evaporative function part during the cooling. An indoor cooling means for cooling the indoor air by using the third heat exchange function part as the evaporation function part and the first heat exchange function part as the condensation function during the heating. An absorptive refrigeration apparatus comprising: a defrosting unit that operates as a part to defrost the first heat exchange function part. 2. An absorbent circulating system that circulates the absorbent through an absorbing function part that absorbs refrigerant vapor into the absorbent.
Refrigerant via a generating function part for evaporating refrigerant vapor from the absorbing liquid, a condensing function part for condensing the vaporized refrigerant vapor to obtain a condensed refrigerant, and an evaporating function part for evaporating the condensed refrigerant to obtain refrigerant vapor. A refrigerant circulating system for circulating the refrigerant, wherein the refrigerant circulating system cools or heats room air, and operates as the condensing function part during the cooling. In between, a heat exchange means between the refrigerant and the outside air for performing heat exchange of the first heat exchange function part operating as the evaporation function part by direct heat exchange with the outside air, and cooling the absorption function part during the cooling A cooling fluid / air-to-air heat exchange means for performing heat exchange of the second heat exchange function part for cooling the heat operation fluid to be performed by direct heat exchange with the outside air, and heat exchange between the heat operation fluid and the room air. For exchange An indoor means for heating the interior of the room, a first heat exchange function part, a parallel heat exchange arrangement means for arranging the second heat exchange function part in parallel and adjacent to each other, An indoor cooling unit that cools the indoor air based on heat exchange of a third heat exchange function part that operates as the evaporating function part, and a part of the heat operation fluid during the heating. By circulating to the second heat exchange function part, a first defrost means for defrosting the first heat exchange function part, and the third heat exchange function part during the heating. A second defrosting unit that operates as the evaporating function part and operates the first heat exchange function part as the condensation function part to perform defrosting of the first heat exchange function part; The first defrosting means or the Absorption refrigerating apparatus characterized by comprising a defrosting selecting means for selecting one of the two defrosting means.