JPH08200873A - Absorption refrigerating equipment - Google Patents

Abstract

PURPOSE: To provide an absorption refrigerating equipment of excellent coefficient of performance viewed from the whole aspects of the equipment by providing the heat exchanging function (GAX function) between an adsober/generator with small heat operation loss due to overheating/supercooling. CONSTITUTION: A dilute solution 2b at the bottom of a generator 5 is sucked from a spray tube 201D to an absorber 1 through an absorbed liquid heat exchanger 31, and the refrigerant vapor 7C is sucked to make the dense liquid 2a. The deuse solution 2a is shifted from a spray tube 205C to a generator 5. The deuse solution 2a receives the absorption heat by a heat exchanger 201X, and receives the dilute solution 2b by the heat exchanger 31. A flow rate adjusting valve V1 is provided on the pipe to bypass a heated side 31A of the heat exchanger 31. The flow rate of the valve V1 is adjusted to adjust the calorie received by the dilute solution 2b so that the temperature of the dilute solution 2b to be sprayed from the spray tube 201D may be appropriate. Similar adjustment can be achieved by a flow rate adjusting valve V2 of the piping to bypass the heating side of the heat exchanger 31. The temperature of the dilute solution 2b in an absorber 1 is optimized to eliminate the loss of the GAX function, and the coefficient of performance viewed from the whole aspects of the equipment is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerating machine which cools and heats a target heat-operated fluid by performing a required heat exchange operation using an absorbing liquid mixed with a refrigerant agent. The present invention relates to an absorption refrigerating machine such as an absorption chiller / heater (referred to as an absorption refrigerating apparatus in the present invention).

[0002]

2. Description of the Related Art In a device of this type, a refrigerant, for example, a fluid whose evaporation temperature is relatively low, such as NH3,
BACKGROUND ART Absorption refrigerators are known in which ammonia is used as an absorbing liquid, which is an inexpensive and harmless fluid having a relatively high evaporation temperature with respect to this refrigerant, for example, water mixed therein.

Further, required heat exchange is carried out between a generator for heating the absorbing liquid to evaporate the refrigerant, and an absorber for absorbing the refrigerant in the water. The function of providing the function to make it possible, that is, the heat exchange function between the generator and the absorber (Generator-Absorber Heat)
An absorption refrigerator having a structure for improving heat operation efficiency by providing an Exchanger) is well known, and this heat exchange function between generator and absorber is called a GAX function.

Regarding the operation and effect of this GAX function, the GAX function is performed by the trap line which connects the pipeline provided in the absorber and the pipeline provided in the absorber in a trapezoidal shape. The configuration is, for example, ASME, AES, VOL.
8, 1988, page 98. 2 Gener
attor-Absorber Heat Exchange
Ger Unit (hereinafter, referred to as the first related art).

Further, the specific structure of the absorption refrigerator having the GAX function, that is, the structure shown in FIG.
It is disclosed by Japanese Patent Application Laid-Open No. 6-323676 (hereinafter referred to as the second prior art) based on the prior application Japanese Patent Application No. 5-134162 by the applicant of the present application.

First, in the configuration shown in FIG. 5, the circulation system for the absorbing liquid will be described with reference to the rare liquid 2b having a low refrigerant concentration accumulated at the bottom of the generator 5, as a starting point.
Due to the pressure difference between the inside and the inside of the absorber 1, the heat exchange tube 205
A → Pipe 16 → Absorbent heat exchanger 31 → Pipe 204 → Decompressor 9 → Pipe 18 and then sprayed from spray pipe 201D, heat exchange pipe 201X / heat exchange pipe 201B / cooling pipe 2
While dripping along 01A, the refrigerant vapor 7c is absorbed to become a concentrated liquid 2a, which is collected at the bottom of the absorber 1.

The concentrated liquid 2a is pressurized by the pump 3 provided in the pipe line 4, and the heat exchange pipe 201B → the pipe line 17 → the heat exchange pipe 205D → the pipe line 203 → the heated side of the absorbing liquid heat exchanger 31. 31A → pipe 8 → heat exchange pipe 201X → pipe 202, and then sprayed from the spray pipe 205C to the inside of the generator 5.

During this path, the heat exchange tube 201
At B, the heat of the refrigerant vapor 7c and the heat generated when the rare liquid 2b sprayed from the spray pipe 201D absorbs the refrigerant vapor 7c are taken, and then at the heat exchange pipe 205D, the heat of the refrigerant vapor 7a is taken, and then , Heated side 31A of absorbing liquid heat exchanger 31
Heat exchange tube 2 after being preheated further by passing through
At 01X, again, the heat of the refrigerant vapor 7c and the heat generated when the dispersed rare liquid 2b is absorbed by the refrigerant vapor 7c are taken away and heated, and then sprayed from the spray pipe 205C and along the heat exchange pipe 205A. Refrigerant vapor 7
After evaporating a, it is circulated so as to collect as the dilute liquid 2b at the bottom of the generator 5.

Therefore, the heat exchange tube 201X constitutes a GAX functional portion that utilizes the heat existing in the absorber 1 to assist the heating required for the refrigerant vapor generation on the generator 5 side. .

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 dilute liquid 2b by the heater 6 contains a large amount of water vapor component. Therefore, the gas-liquid contact action, that is, the heat exchange that occurs when the refrigerant vapor is brought into contact with the surface of the absorbing liquid,
By increasing the concentration of the refrigerant in the refrigerant vapor 7a by the action of separation and absorption, that is, the concentration of NH3, and performing the rectification action of removing the residual heat by the heat exchange pipe 205D, and further by taking the heat by the heat exchange pipe 205E. , A portion of the refrigerant vapor 7a is condensed, that is, the refrigerant vapor in the portion in contact with the heat exchange tube is condensed, and the high-concentration absorption liquid and the refrigerant vapor 7a are obtained.
The gas-liquid contacting action with the refrigerant causes a fractional action of gradually increasing the concentration of the refrigerant in the refrigerant vapor 7a.

Then, the refrigerant vapor 7a which has undergone this fractional distillation action
Is from line 10 to condenser 11 → line 12 → pressure reducer 13 →
It is sent to the absorber 1 via the evaporator 14 → pipe 15 and absorbed by the diluted liquid 2b sprayed from the spray pipe 201D to become a concentrated liquid 2a, which joins the above-mentioned absorbent circulation system and the spray pipe 20.
It is sprayed from 5C, heated by the heater 6, and circulated so as to become the refrigerant vapor 7a.

Here, the refrigerant vapor 7a that has entered the condenser 11 via the conduit 10 gives heat to the first heat-operated fluid 35a, for example, water, which passes through the heated side 11a to radiate and condense. After becoming the refrigerant liquid 7b, the pressure reducing device 13 is passed through the pipe line 12.
to go into. The pressure reducers 9 and 13 are each composed of a pressure reducing valve.

The refrigerant liquid 7b decompressed by the decompressor 13
Enters the evaporator 14, takes heat from the second heat-operated fluid 35b passing through the cooled side 14a of the evaporator 14, for example, water to evaporate and become the refrigerant vapor 7c, and then via the pipe 15. , The first heat-operated fluid 35a passing through the conduits 20, 21, 22, 23 by passing through the route of returning to the absorber 1.
And the second heat operation fluid 35b passing through the pipelines 24 and 25 are given the necessary heat operation.

Next, the pipelines 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, which are circulated by the indoor heat exchanger 62 and the indoor heat exchanger 62, will be described. The connection switching device 63 allows the connection path to be changed, and the pump 64 is a pump for promoting the circulation of the first thermally operated fluid 35a, for example, water, which passes through the heated side 11a of the condenser 11. The pump 65 is the evaporator 14
Is a pump for promoting the circulation of the second thermally operated fluid 35b, for example, water, which passes through the cooled side 14a.

The cooling pipe 201A of the absorber 1 has a first
Pipes 20 and 21 for supplying the heat operating fluid 35a, the pipes 22 and 23 for supplying the first heat operating fluid 35a to the heated side 11a of the condenser 11, and the second side to the cooled side 14a of the evaporator 14. To the conduits 24 and 25 for supplying the heat-operated fluid 35b, the heat-operated fluid to be subjected to desired heating / cooling, for example,
It is configured to give water for heating / cooling and water for absorbing / dissipating heat, for example, water absorbed / dissipated through a finned radiator.

The pipeline connection switching device 63 is a switching valve that switches eight pipelines to a connection pathway shown by a solid line and a connection pathway shown by a dotted line in the figure. It is also called a valve, and is operated by operating a switching shaft by an electric actuator that operates based on a control signal from the CPU 70 to perform switching operation.

By the switching connection according to the route shown by the solid line, the conduit 20 → the cooling pipe 201A → the conduit 21 → the conduit 22 →
The heated side 11a of the condenser 11-> the pipeline 23-> the pipeline connection switch 63-> the outdoor heat exchanger 61-> the pipeline connection switch 63-> the circulation path of returning to the pipeline 20 via the pump 64
Of the outdoor heat exchanger 61 while circulating the heat operation fluid 35a of
Cooling heat radiation path which is configured to perform heat radiation operation by forcibly giving outdoor air to the heat radiation side 61A of the fan by a blower 61B and the like, and the pipe line 24 → the cooled side 14a of the evaporator 14 → the pipe line 25 → pipe line connection switching Device 63 → indoor heat exchanger 62 → pipe line switching device 6
3 → By the circulation path that returns to the pipeline 24 via the pump 65, while circulating the second heat operation fluid 35b, the indoor side of the indoor heat exchanger 62 is cooled by the blower 62B for circulation, etc. By forming a cooling heat radiation path that is forced to give a cooling operation to the air in the room,
The cooling operation by the heat operation fluid, that is, the circulation mode in the case of the cooling operation is configured.

Further, by the switching connection by the route shown by the dotted line, the pipe line 20 → the cooling pipe 201A → the pipe line 21 → the pipe line 22.
→ Heated side 11a of condenser 11 → Pipe line connection switch 63 →
The indoor heat exchanger 62 → the pipe connection switching device 63 → the circulation path of returning to the pipe 20 via the pump 64, while circulating the first heat operation fluid 35a, to the heated side 62A of the indoor heat exchanger 62. A heating / radiating path for forcibly giving indoor air to heat the indoor air, and a pipe line 24 → cooled side 14a of evaporator 14 → pipe line 25 → pipe line connection switch 6
3-> outdoor heat exchanger 61-> pipe connection switching device 63-> pump 6
By the circulation path that returns to the pipeline 24 via 5, while the second heat operation fluid 35b is circulated, outdoor air is forcibly given to the heat absorption side 61A of the outdoor heat exchanger 61 by the blower 61B or the like to perform the heat absorption operation. By forming the heat absorption path as described above, the heating operation of the heat operation fluid, that is, the circulation mode in the heating operation is configured.

The control of the cooling operation or the heating operation of the heat operation fluid is performed by the control signals of the respective parts of the CPU 70. Then, in this control, the CPU 7 outputs a detection signal of each part detecting a required operating state of each part, such as temperature, and a setting signal from the setting operation part 80 for setting an operating condition.
0, and the CPU 70 performs the required control processing to obtain the control signals of the respective parts, and the heater 6 and the line connection switching device 6
3, the operation of each pump 3, 64, 65, etc. is controlled.

Further, when the GAX function part by the above-mentioned first conventional technique is provided, the structure is like that of the absorption type refrigeration system 100 of FIG. 6, and the heat exchange between the generator and the absorber is performed. The part 270 constitutes the GAX function part. In FIG. 6, the parts designated by the same reference numerals as those in FIG.
This is a part having the same function as the part with the same reference numeral explained in.

In FIG. 6, the heat exchange section 2 between the generator and the absorber.
Reference numeral 70 denotes a heat exchange tube 2 that gives heat to the refrigerant vapor 7a to radiate the heat.
05B is provided in the generator 5, and the heat exchange tube 2 receives the heat when the diluted liquid 2b dispersed in the absorber 1 absorbs the refrigerant vapor 7c and the heat of the diluted liquid 2b, and absorbs the heat from the diluted liquid 2b.
01C is provided in the absorber 1, and each heat exchange tube 205B
・ Covering pipe line 271 in which the vertical relationship of 201C is reversed
A third heat-operated fluid 35c passing through the inside is pumped with a heat medium such as water, silicon oil, phenylxylylethane, or the like 2
In addition to being circulated at 60, a liquid reservoir 272 is provided in this circulation path if necessary.

According to the absorption type refrigerating apparatus 100 provided with the GAX function portion as shown in FIG. 6, the operation having the temperature: pressure characteristic as shown in the GAX cycle diagram of FIG. 7 can be performed.

The GAX cycle diagram of FIG. 7 shows an ideal G
In the AX cycle, point A is the operating point of the refrigerant condensate of the condenser 11, point B is the operating point of the refrigerant vapor of the evaporator 14, and point C is the operation of the concentrated liquid 2a at the bottom of the absorber 1. Points D and D are operating points of the concentrated liquid of the spray pipe 205C, point E is an operating point of the dilute liquid 2b at the bottom of the generator 5, and point F is an operating point of the dilute liquid of the spray pipe 201D.

The circulation system of the refrigerant circulates through the heat operation route of A point → B point → C point → D point → A point, and the circulation system of the absorbing liquid is D point → E point → F point → C. It circulates in the thermal operation route from point to point D ....

Therefore, the pressure in the generator 5 is the pressure value P
a, the pressure in the absorber 1 is the pressure value Pb, the temperature of the diluted liquid 2b at the bottom of the generator 5 is the temperature value Ta, the temperature of the diluted liquid in the spray pipe 201D is the temperature value Tb, and the condensed refrigerant in the condenser 11 is The temperature is the temperature value Tc, and the temperature of the refrigerant vapor in the evaporator 14 is the temperature value Tc.
d, the temperature of the dilute liquid 2a at the bottom of the absorber 1 is a temperature value Te, the temperature of the concentrated liquid in the spray pipe 205C is a temperature value Tf, the heating amount in the generator 5 by the heater 6 is the temperature range TG, the cooling pipe 201
The amount of cooling in the absorber 1 by A corresponds to the temperature range TA.

The hypotenuse L1 is, for example, an operation line of NH3, that is, 100% ammonia, and the hypotenuse L2 is, for example, an operation line of 5% ammonia and 95% water.
The heat transfer operation is performed in the hatched area by the AX function portion. That is, the third heat-operated fluid 35c flowing through the GAX heat exchange tube 201C in the absorber 1 operates so as to remove the heat in the absorber 1, and this operation causes the temperature in the absorber 1 to reach a temperature value. Tb
To the temperature value Th from the third heat operating fluid 35
c increases from the temperature value Th to the temperature value Tb.

On the other hand, the heat exchange tube 2 for GAX in the generator 5
The third heat-operated fluid 35c having a high temperature flowing through 05B operates so as to release its own heat to heat the generator 5, and this operation causes the temperature in the generator 5 to rise to the temperature value Tf.
To the temperature value Tg from the third heat operating fluid 35
The temperature of c will fall from the temperature value Tg to the temperature value Tf.

Therefore, in the operation of the GAX function part, the heat quantity for cooling the absorber 1 by the cooling pipe 201A and the heat quantity for heating the generator 5 by the heater 6 are reduced by the hatched range. That is what you are getting.

[0029]

In the inter-generator-absorber heat exchange section 270 having the configuration shown in FIG. 6 described above, that is, in the GAX section, the third heat-operated fluid 35c passing through the suspension line 271 is used.
Since there is a secondary heat exchange through the third heat manipulation fluid 35c, there is a heat loss corresponding to the presence of the third heat operation fluid 35c.
Energy consumption for operating the pump 260 increases, and further, there is a heat radiation loss due to the liquid reservoir 272, so that there is a disadvantage that the coefficient of performance of the entire device is limited.

In the configuration of FIG. 5 described above, direct heat exchange between the absorbing liquid by the dilute liquid and the concentrated liquid is performed without interposing the third heat operation fluid 35c, so that the above-mentioned inconvenience is caused. However, the temperature Tb of the dilute liquid 2b sent from the spray pipe 201D to the absorber 1 fluctuates under the influence of the outside air temperature, the room temperature, the heating amount, etc., and deviates from the point F in FIG. The inconvenience occurs.

When the temperature value Tb at the point F deviates to the higher side, the rare liquid 2b sprayed from the spray pipe 201D.
Because of boiling, the absorption operation in the absorber 1 becomes poor, the coefficient of performance seen in the entire apparatus decreases, and when the temperature value Tb at the point F deviates to the lower side, it is sprayed. Tube 20
The temperature range in which the rare liquid 2b sprayed from 1D can use the GAX operation, that is, the range of the temperature value Tb to the temperature value Th is narrowed, which causes a disadvantage that the coefficient of performance of the entire apparatus is lowered.

Therefore, there is a problem that it is desired to provide an absorption type refrigerating apparatus which does not have such an inconvenience.

[0033]

A first path for supplying the absorbing liquid, which has absorbed the refrigerant vapor in the absorbing function portion, to the generating function portion for evaporating the refrigerant vapor from the absorbing liquid; An absorption liquid circulation system that circulates the absorption liquid by the second path that gives the absorption liquid obtained by evaporating the refrigerant vapor to the absorption function part in the generation function part, the first path, and the second path. In an absorption type refrigeration system provided with an absorption liquid heat exchange function part for performing heat exchange with the path,

First, there is provided heat exchange amount adjusting means for adjusting the heat exchange amount of the absorbing liquid heat exchanging function portion so that the temperature of the absorbing liquid given to the absorbing function portion becomes a predetermined value.
And the configuration of

In place of the heat exchange amount adjusting means in the first structure, a third path is provided which branches the second path and bypasses the absorbed liquid heat exchange function portion.
Bypass means for providing a flow rate adjusting function portion in the third path;

A second structure is provided in which branch flow rate adjusting means is provided for adjusting the temperature of the absorbing liquid applied to the absorbing function section by adjusting the flow rate of the flow rate adjusting function section.

In place of the heat exchange amount adjusting means in the above-mentioned first structure, a third path is provided which branches the above-mentioned first path and bypasses the above-mentioned absorbed liquid heat exchange functional portion, and Bypass means for providing a flow rate adjusting function portion in the third path;

The above problem is solved by the third structure or the like which is provided with a branch flow rate adjusting means for adjusting the flow rate of the flow rate adjusting function section to adjust the temperature of the absorbing liquid applied to the absorbing function section to a predetermined value. To solve the problem.

[0039]

According to the first configuration, the temperature of the absorbing liquid entering the absorbing function portion from the generating function portion, that is, the temperature of the dilute liquid passing through the heating side is adjusted by adjusting the heat exchange amount of the absorbing liquid heat exchange function portion. Since it can be changed, the temperature Tb at the point F of the GAX cycle is moved in the ascending direction or the descending direction, that is, is moved in the left-right direction of the GAX cycle diagram to match the temperature point on the hypotenuse L2. Therefore, the thermal operation can be performed in a state close to the ideal GAX cycle, and the coefficient of performance of the entire apparatus is improved.

According to the second configuration, the absorption liquid having a high temperature from the generating function part, that is, the dilute liquid is adjusted by adjusting the flow rate of the absorbing liquid passing through the absorption liquid heat exchanging function part, thereby substantially reducing the heat. Since the flow rate of the dilute liquid passing through the exchange function part is changed, the amount of heat given to the absorbing liquid passing through the heated side of the absorption liquid heat exchange function part, that is, the concentrated liquid from the absorption function part changes,
After all, the temperature of the dilute liquid given to the absorption function part, that is, GA
Since the temperature Tb at the point F of the X cycle can be moved in the ascending direction or the descending direction, that is, in the left-right direction of the GAX cycle diagram, and adjusted so as to match the temperature point on the hypotenuse L2, The thermal operation can be performed in a state close to an ideal GAX cycle, and the coefficient of performance of the entire apparatus is improved.

According to the third configuration, the cooled absorption liquid from the absorption function portion, that is, the concentrated liquid is substantially absorbed by adjusting the flow rate of the absorption liquid heat exchange function portion passing by-pass. Since the flow rate of the concentrated liquid passing through the liquid heat exchange function part is changed, the absorbing liquid passing through the heating side of the absorbing liquid heat exchange function part,
In other words, the amount of heat taken from the dilute solution from the generating function part changes, and in the end, the temperature of the dilute liquid given to the absorbing function part, that is,
Since the temperature Tb at the point F of the GAX cycle can be moved in the ascending direction or the descending direction, that is, in the left-right direction of the GAX cycle diagram, and adjusted to match the temperature point on the hypotenuse L2, The thermal operation can be performed in a state close to an ideal GAX cycle, and the coefficient of performance of the entire apparatus is improved.

[0042]

EXAMPLES Examples will be described below with reference to FIGS.
1 to 4, parts indicated by the same reference numerals as those in FIGS. 5 to 7 have the same functions as those of the same reference numerals explained in FIGS. 5 to 7, and the same reference numerals in FIGS. The part indicated by is a part having the same function as the part with the same reference numeral explained in any of these figures.

FIG. 4 is a GAX cycle corresponding to FIG. 7, and is a diagram for explaining the operating principle of the present invention.
When the absorption liquid heat exchange function part, that is, the heat exchange function of the absorption liquid heat exchanger 31 does not correspond to the ideal GAX cycle heat operation of the absorption liquid circulation system, the absorption function part, that is,
When the temperature of the dilute liquid given to the absorber 1 is higher than the ideal temperature value Tb, for example, it moves to the point F'of the temperature value Tb ', and when it is low, for example, the temperature value Tb "of the temperature value Tb". You have moved to point F ″.

In the case of Tb ', the spray pipe 201
The diluted liquid 2b sprayed from D into the absorber 1 boils, which reduces the efficiency of the absorbing action and the efficiency of the heating action and the vaporizing action of the absorbing liquid in the generator 5. The amount by which the heating amount TG can be reduced by the GAX action becomes small.

In the case of Tb ", (Tb" -T
The amount of heat corresponding to (h) / (Tb-Th) reduces the heating action and the evaporation action in the generator, and the heating amount TG can be reduced by the GAX action.

Therefore, according to the present invention, the absorbing liquid heat exchanger 31 is used.
By arranging the amount of heat exchange by variably adjusted, the F'point or the F "point is adjusted and moved so as to move to the F point which is an ideal operating point.

Here, assuming that the ideal temperature value of the temperature Tb at the point F is TX, for example, the temperature value Tb ′ is TX ′ and the temperature value Tb ″ is TX ″, the following expression is obtained. You can

TX ′ = TX + ΔT (1) TX ″ = TX−ΔT (2) This ΔT is a deviation value from the ideal temperature value TX, but in general, It is also called superheat degree, and -ΔT is called negative superheat degree or supercooling degree.

If the function symbol is f [], the refrigerant concentration of the absorbing liquid is J, and the refrigerant concentration in the refrigerant vapor, that is, the ammonia concentration is K, and K≈100, the temperature value TX becomes the pressure of each part. The relationship with temperature is as follows.

Pa = f [Tc, K] (3) Pb = f [Tb, K] (4) J = f [Pa, Ta] (5) TX = f [J, Pb] ………… (6)

However, each temperature value and each pressure value are
Since the coefficient values related to the functions of the above equations differ depending on the manufactured individual devices, it is necessary to store the calculated coefficient values in the processing memory of the CPU 70 by the actual test operation. .

Therefore, in adjusting the heat exchange amount of the absorbing liquid heat exchanger 31, the coefficient values obtained by the actual test operation are set to C
It may be stored in the processing memory of the PU 70 and controlled so that the ideal temperature value TX calculated by the above (6) is obtained, that is, ΔT is minimized.

A concrete embodiment will be described below with reference to FIG. In FIG. 1, the difference from the configuration of FIG.
2 is a location where the heat exchange tube 201B in the circulation path of the absorbing liquid is eliminated to simplify the configuration of the GAX functional portion, and secondly, the heat exchange tube 205E in the circulation path of the first heat operation fluid 35a is provided. This is a simplified part without providing the structure for performing the fractionation operation in the generator 5 without it.

Thirdly, the line connection switching device 6 using a four-way valve
By 3B, the heat exchangers constituting the condenser 11 and the evaporator 14 are arranged in a refrigerant circulation system so as to perform operations opposite to each other during the cooling operation and the heating operation.
This is a portion in which the portion of is designated as the condensation / evaporation heat exchanger 11A, and the portion of the evaporator 14 is designated as the evaporation / condensation heat exchanger 14A.

Fourthly, the condensation / evaporation heat exchanger 11
By arranging A in parallel with and adjacent to the outdoor heat exchanger 61 for radiating the first heat-operated fluid 35a, condensation /
This is a portion configured to perform heat exchange between the evaporation heat exchanger 11A and the outdoor heat exchanger 61.

Fifth, the opening / closing valve 301 is used to cool the flow path of the first heat operation fluid 35a during the cooling operation, that is, during the cooling operation.
Open C and the opening / closing valve 301D, guide them to the outdoor heat exchanger 61, and perform the opening / closing valve 301 during the heating operation, that is, during the heating operation.
A and the opening / closing valve 301B are opened, and the second heat operation fluid 35
This is a portion configured to join the flow of b.

Sixthly, a flow rate adjusting valve V2 for bypassing the flow path of the absorbing liquid heat exchanger 31 is provided between the heating side pipes 16 and 204 of the absorbing liquid heat exchanger 31, and the absorption This is a portion where a flow rate adjusting valve V1 that bypasses the flow path of the absorbing liquid heat exchanger 31 is provided between the pipes 203 and 202 on the heated side 31A of the liquid heat exchanger 31.

Seventh, each detector for detecting the pressure Pa in the generator 5 and the pressure Pb in the absorber 1, the temperature Ta of the dilute liquid 2a at the bottom of the generator 5, and the conduit 18 Dispersion tube 201
The temperature Tb of the dilute liquid 2b in the pipe very close to D and the temperature Tc of the condensed refrigerant in the pipe of the condensation / evaporation heat exchanger 11A.
And the temperature T of the refrigerant vapor in the conduit of the evaporation / condensation heat exchange 14.
Each detector for detecting d and is provided, and the detection value of each detection signal is stored in the working memory of the CPU 70 by supplying each detection signal to the CPU 70.
Based on the calculation of the above formulas (1) to (6), a required value, for example, TX is obtained, and the flow rate adjusting valve V1 or the flow rate adjusting valve V1 is set so that the temperature value of the detected temperature Tb approaches TX. Control to adjust the flow rate of V2 or both of them, or obtain ± ΔT, and based on ± ΔT,
Similarly, it is a portion configured to control the above flow rate to be adjusted.

It should be noted here that, in the configuration of FIG. 1, the condensation / evaporation heat exchanger 11A and the evaporation / condensation heat exchanger 14A are different from each other in the cooling operation and the heating operation, respectively. Since the functions are switched, the detected temperature T
c and the detected temperature Td are as shown in FIG. 4 or FIG. 6 during the cooling operation.
Corresponding to the temperature value Tc and the temperature value Td, the detected temperature Tc corresponds to the temperature value Td shown in FIG. 4 or 6, and the detected temperature Td corresponds to the temperature value shown in FIG. 4 or 6. Tc
Therefore, it is necessary to comply with the above correspondence also in the calculation of the above formulas (1) to (6).

The on-off valve 301A and the on-off valve 301B
Is closed during the cooling operation, opened during the heating operation, and the open / close valves 301C and 301D are open during the cooling operation and closed during the heating operation.

The pump 3 and the pump 65 are used during cooling operation.
During heating operation, both are in operation. Also, the pump 6
No. 4 is in the operating state during the cooling operation and is in the stopped state during the heating operation.

The pipe line connection switch 63B is in the route state shown by the solid line during the cooling operation, and is in the route state shown by the dotted line during the heating operation. And these on-off valves 301A, 301
The CPU 70 controls the operating states of the B, 301C, 301D, the pumps 3, 64, 65, the line connection switching device 63B, etc., and each circulation system operates as follows.

The absorption liquid circulation system is composed of flow rate adjusting valves V1 and V2.
Is closed, the dilute liquid 2b at the bottom of the generator 5 → heat exchange pipe 205A → pipe 16 → absorption liquid heat exchanger 31 → decompressor 9 → pipe 18 → spray pipe 201D → concentrate Liquid 2b
→ pipe 4 → pump 3 → pipe 17 → heat exchange pipe 205D → pipe 8 → heat exchange pipe 201X → pipe 202 → heated side 31A of absorbing liquid heat exchanger 31 → spray pipe 205F and diluted liquid 2b
Circulate the path back to.

During the cooling operation, that is, during the cooling operation, the refrigerant circulation system is for the refrigerant vapor 7a in the generator 5 → the pipeline 10 → the pipeline connection switching unit 63B → the condensation / evaporation heat exchanger 11A → for preheating. Heat exchanger 214 → pressure reducer 215 → check valve 216 → evaporation / condensation heat exchanger 14A → heated side 214a of preheating heat exchanger 214 → pipe line connection switch 63B → pipe line 15 → in absorber 1 The concentrated liquid 2a is 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 pipeline 10 → the pipeline connection switch 63B → the check valve 220 → the evaporation / condensation heat exchanger 14A.
→ pressure reducer 221 → check valve 222 → condensation / evaporation heat exchanger 1
1A → Pipe connection switching device 63B → Pipe 15 → Take a path through the refrigerant vapor 7c in the absorber 1 to be absorbed by the dilute liquid 2a and enter the concentrated liquid 2a.

The circulation system of the first heat operation fluid 35a is such that the cooling pipe 201A → the pipe line 21 → the on-off valve 301C during the refrigerant operation.
→ Outdoor heat exchanger 61 → Pipe 20A → Pump 64 → Open / close valve 301D → Return to the cooling pipe 201A via the pipe 20.

During the heating operation, the cooling pipe 201A →
Pipe line 21 → Open / close valve 201B → Join second heat operating fluid 35b in pipe line 25 → Indoor heat exchanger 62 → Pump 65 → Pipe line 24 → Open / close valve 301A → Pipe line 20 and cooling pipe 201A
However, the flow branched from the conduit 24 on the way merges into the conduit 25 via the heated side 14Aa of the heat exchanger 14A.

The circulation system of the second heat operation fluid 35b is such that the indoor heat exchanger 61 → pump 65 → pipe line 24 →
The cooled side 14Aa of the heat exchanger 14A is returned to the indoor heat exchanger 61 via the conduit 25. Then, during the heating operation, the first heat operation fluid 35a is merged and circulated.

Then, the operation of the adjusting portion for varying the heat exchange amount by the absorbing liquid heat exchanger 31 and the flow rate adjusting valves V1 and V2 is as follows.
So that the flow rate Wd flowing through the flow path is a total amount of the flow rate We flowing through the pipe on the heating side of the absorption liquid heat exchanger 31 and the flow rate Wf flowing through the bypass by the flow rate adjusting valve V2, that is, Wd = We + Wf. Is configured.

In addition, the dilute liquid 2a is supplied from the absorber 1 to the conduit 203.
The flow rate Wa of the absorbed liquid heat exchanger 31 is 3
The total amount of the flow rate Wb flowing through the pipeline of 1A and the flow rate Wc flowing through the side passage by the flow rate adjusting valve V1, that is, Wa = Wb
It is configured to have a relationship of + Wc.

Here, by providing either one of the side passage structure of the flow rate adjusting valve V1 and the side passage structure of the flow rate adjusting valve V2, the target heat exchange amount can be adjusted. However, if necessary, both of them may be provided to adjust the heat exchange amount.

[Configuration in which only the flow rate adjusting valve V1 is provided] In the configuration in which only the side passage by the flow rate adjusting valve V1 is provided, for example,
When the detected temperature value Tb is at the point F ', the control is performed so as to reduce the flow rate Wc of the flow rate adjusting valve V1 in order to control so as to approach the ideal temperature value TX in FIG.

By this adjustment, the flow rate W of the low temperature concentrated liquid 2a flowing to the heated side 31A of the absorbing liquid heat exchanger 31 of FIG.
Since b increases, the flow rate Wb that takes heat from the high-temperature diluted liquid 2b from the generator 5 flowing on the heating side of the absorption liquid heat exchanger 31.
Therefore, the temperature Tb of the dilute liquid 2b having the flow rate Wd sent to the sprayer 201D is controlled to decrease and approach the temperature value TX.

Further, for example, the detected temperature value Tb is F ″.
If it is a point, if the flow rate Wc of the flow rate adjusting valve V1 is adjusted and controlled to increase, the absorption liquid heat exchanger 31 of FIG.
The flow rate Wb of the low temperature concentrated liquid 2a flowing to the heated side 31A is reduced.

Therefore, the flow rate Wb of depriving heat from the high-temperature diluted liquid 2b from the generator 5 flowing on the heating side of the absorption liquid heat exchanger 31 is reduced, so that the diluted liquid 2b of the flow rate Wd sent to the sprayer 201D is reduced. The temperature Tb is controlled to rise and approach the temperature value TX.

[Configuration in which only the flow rate adjusting valve V2 is provided] In the configuration in which only the side passage by the flow rate adjusting valve V2 is provided, for example, when the detected temperature value Tb is the point F ', the ideal temperature value in FIG. In order to control the flow rate to approach TX, the flow rate control valve V2 is adjusted and controlled to reduce the flow rate Wf.

By this adjustment, the flow rate We of the dilute liquid 2b flowing to the heating side of the absorption liquid heat exchanger 31 in FIG. 3 is increased, so that the absorption liquid from the absorber 1 flowing to the heated side 31A of the absorption liquid heat exchanger 31 is changed. Since the flow rate We of which heat is absorbed by the low-temperature concentrated liquid 2a increases, the temperature Tb of the rare liquid 2b having the flow rate Wd sent to the sprayer 201D is controlled to decrease and approach the temperature value TX.

Further, for example, the detected temperature value Tb is F ″.
If it is the point, if the flow rate Wf of the flow rate adjusting valve V2 is adjusted and controlled so as to increase, the absorption liquid heat exchanger 31 of FIG.
The flow rate Wb of the high temperature dilute liquid 2b flowing to the heating side of is reduced.

Therefore, the flow rate We taken by the low-temperature concentrated liquid 2a from the absorber 1 flowing through the heated side 31A of the absorption liquid heat exchanger 31 to remove heat is reduced, so that the flow rate Wd sent to the sprayer 201D is rare. The temperature Tb of the liquid 2b rises and is controlled to approach the temperature value TX.

[Structure in which both flow rate adjusting valve V1 and flow rate adjusting valve V2 are provided] The operation in the above-mentioned configuration in which only the flow rate adjusting valve V1 is provided and the operation in the configuration in which only the flow rate adjusting valve V2 is provided are simultaneously performed in parallel. A serial control type configuration in which after performing the operations in the parallel control type configuration and the configuration in which only the flow rate adjusting valve V1 is provided to the maximum, subsequently, the operation in the configuration in which only the flow rate adjusting valve V2 is provided is performed. Both are possible.

The specific operation in these configurations can be easily understood from the description of the operation in the configuration in which only the flow rate adjusting valve V1 is provided and the operation in the configuration in which only the flow rate adjusting valve V2 is provided. It's a motion, and you probably don't need to explain it.

The flow rates of the flow rate adjusting valve V1 and the flow rate adjusting valve V2 are ideally adjusted by the above equations (1) to (1).
While performing the calculation according to (6), it is preferable to perform the optimum control by adjusting and controlling so as to always follow the optimum value suitable for the thermal operation state, but the control operation becomes too frequent, Since the life of the movable operation part of the device is shortened, it is better to control ΔT by providing a dead zone of about ± 3 ° C in the experimental results.

However, the apparatus is relatively small in scale, and in the above-mentioned actual test operation, the flow rate adjusting valve V1 and the flow rate adjusting valve V
As a result of the manual adjustment of the adjustment for 2, the target may be almost achieved in a state where it is fixed at the adjustment point.
Such adjustments are sufficient if the device is provided inexpensively.

To summarize the configuration of the above-described embodiment, the absorbing function portion, for example, the absorbing liquid, for example, the concentrated liquid 2a in which the refrigerant vapor 7c is absorbed by the absorber 1, is evaporated from the absorbing liquid 2a. Generating function part for causing the generator 5, for example, a first path to be given to the generator 5, for example, the conduits 203 and 20.
2 and the above-mentioned generation function part, that is, the second path for supplying the absorption liquid obtained by evaporating the refrigerant vapor 7c in the generator 5, for example, the dilute liquid 2b, to the above-mentioned absorption function part, that is, the absorber 1.
For example, the absorption liquid circulation system that circulates the absorption liquid through the conduits 16 and 204, and the first path described above, that is, the conduit 203.
202 and the above-mentioned second path, that is, the conduits 16 and 20
4 is provided with an absorbing liquid heat exchange function part for exchanging heat with the absorbing liquid heat exchanger 31, for example.
At 0,

The heat exchange amount of the absorbing liquid heat exchange function portion, that is, the absorbing liquid heat exchanger 31, is set to, for example, the flow rate adjusting valve V1 or the flow rate adjusting valve provided in the flow path that bypasses the absorbing liquid heat exchanger 31. V2 or both flow control valves V1 and V
By adjusting the flow rate of 2, the temperature Tb of the absorbing liquid applied to the absorption function portion, that is, the absorber 1 is adjusted to a predetermined value, for example, an ideal temperature value Tx at the point F. This constitutes the first configuration in which the heat exchange amount adjusting means is provided.

In addition, to summarize the above-mentioned [configuration in which only the flow rate adjusting valve V1 is provided], instead of the heat exchange amount adjusting means in the first configuration, the above-mentioned second path, that is, the conduits 16 and 204 are provided. Branch the above absorption liquid heat exchange function part,
That is, a third path that bypasses the absorbing liquid heat exchanger 31, for example, a conduit that connects the conduit 16 and the conduit 204 is provided, and a flow rate adjusting function portion, such as the flow rate, is provided in the third path. By-pass means for providing the regulating valve V2,

The above-mentioned absorption function part, that is, the temperature Tb of the absorbing liquid to be given to the absorber 1 by adjusting the flow rate of the flow rate adjusting valve V2 is set to a predetermined value, for example, the ideal F value. This constitutes a second configuration in which a branch flow rate adjusting means for adjusting the temperature value Tx at the point is provided.

To summarize the above-mentioned [configuration in which only the flow rate adjusting valve V2 is provided], instead of the heat exchange amount adjusting means in the above-mentioned first structure, the above-mentioned first path, for example, the conduit 203. 202 is branched to provide the above-mentioned absorption liquid heat exchange function portion, that is, a third path that bypasses the absorption liquid heat exchanger 31, for example, a pipe path that connects the pipe path 203 and the pipe path 202, A flow rate adjusting function portion, for example, a bypass means for providing a flow rate adjusting valve V1 in the third path,

The above flow rate adjusting function portion, that is, the flow rate of the flow rate adjusting valve V1 is adjusted to adjust the above absorption function portion, that is, the temperature Tb of the absorbing liquid applied to the absorber 1 to a predetermined value, for example, an ideal F. This constitutes the third configuration in which the branch flow rate adjusting means for adjusting the temperature value Tx at the point is provided.

O, the air volume of the blower 61B of the outdoor heat exchanger 61 is FA, and the temperature of the air sent from the indoor heat exchanger 62 is T.
As R, and during heating operation, the temperature of the blown air after cooling the outdoor heat exchanger 61 is TC, the air volume of the blower of the outdoor heat exchanger 61 is FB, and the temperature of the blown air from the indoor heat exchanger 62 is TH. , The function symbol is f [], the refrigerant concentration in the refrigerant vapor, that is, the ammonia concentration is K, and K≈100, and the calculation can be performed from the respective measured values to obtain an alternative use.

[Cooling operation] Pa = f [TO, FA, K] (7) Pb = f [TR, K] (8)

[During heating operation] Pb = f [TC, FB, K] (7) Pa = f [TH, K] (8)

However, also in this case, since the coefficient values applied to the functions of the above equations for each pressure value differ depending on the individual device manufactured, these coefficient values were obtained by the actual test operation. It is necessary to store things in the working memory of the CPU 70 and then calculate.

[Modified Implementation] The present invention includes the following modified implementation.

(1) As shown in FIG. 2, the first to third configurations described above are applied to the configuration of FIG.

(2) As shown in FIG. 2, the pump 64 and the on-off valve 301D in the configuration of FIG.
It is relocated to a location 64A before the first branch location, and the on-off valve 301D is removed. In the case of this configuration, if necessary, during the cooling operation of the pump 64, that is,
The operation state is performed both during the cooling operation and during the heating operation, that is, during the heating operation.

(3) Open / close valve 301A in the configuration of FIG.
-The open / closed structure of the flow path by 301B / 301C / 301D is modified by a structure using a three-way valve or a four-way valve so that the same pipe line connection operation or opening / closing operation can be performed, or a pipe line connection switching device The flow path switching structure by 63B is modified by a structure using an on-off valve or a three-way valve so that the same pipe connection operation can be performed.

(4) Heat exchange tube 201 in the configuration of FIG.
It is configured by removing any of X. 205A and 205D.

(5) In the configuration of (1) above, the heat exchange tubes 201B, 201X, 205A, 205D, 205E.
Remove and configure any of the above.

[0100]

As described above, according to the present invention, by adjusting the heat exchange amount of the absorbing liquid heat exchanging function portion, the temperature of the dilute liquid entering the absorbing function portion from the generating function portion can be changed to ideal. Since the thermal operation can be performed in a state close to a typical GAX cycle, the coefficient of performance of the entire apparatus can be improved.

Further, by adjusting the flow rate of the concentrated liquid passing through the heated side of the absorbing liquid heat exchanging function part, the temperature of the dilute liquid passing through the absorbing liquid heat exchanging function part on the heating side is changed,
Alternatively, by adjusting the flow rate of the dilute liquid passing through the heating side of the absorption liquid heat exchange function part by-passing, the temperature of the dilute liquid passing through the heating side of the absorption liquid heat exchange function part is changed to ideally G
Since the thermal operation can be performed in a state close to the AX cycle, there is a feature that the coefficient of performance of the entire apparatus can be improved.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, and FIG.
-Fig. 6 shows a conventional technique, and the contents of each diagram are as follows.

FIG. 1 is an overall configuration block diagram.

[Fig. 2] Overall configuration block diagram

FIG. 3 is a block diagram of a main configuration

[Fig. 4] Main part operation characteristic diagram

[FIG. 5] Overall configuration block diagram

FIG. 6 is an overall configuration block diagram.

FIG. 7 is an operation characteristic diagram of main parts.

[Explanation of symbols]

 1 Absorber 1A Cooling pipe 2a Concentrated liquid 2b Dilute liquid 3 Pump 4 Pipeline 5 Generator 6 Heater 7a Refrigerant vapor 7c Refrigerant vapor 8 Pipeline 9 Pressure reducer 10 Pipeline 11 Condenser 11a Heated side 11A Condenser 11Aa Covered Heating side 12 Pipe 13 Decompressor 14 Evaporator 14a Cooled side 14A Evaporator 14Aa Cooled side 15 Pipeline 17 Pipeline 18 Pipeline 20 Pipeline 20A Pipeline 21 Pipeline 22 Pipeline 23 Pipeline 24 Pipeline 25 Pipeline 31 Absorbing liquid heat exchanger 31A Heated side 35a First heat operating fluid 35b Second heat operating fluid 35c Third heat operating fluid 61 Outdoor heat exchanger 61A Radiating side 61B Blower 62 Indoor heat exchanger 62A Cooling Time / Cooled side / Heating / Heated side 63 Pipe line connection switcher 63B Pipe line connection switcher 64 Pump 65 Pump 70 CPU 80 Setting operation unit 100 Absorption Refrigerator 201A Cooling pipe 201B Heat exchange pipe 201C Heat exchange pipe 201D Dispersion pipe 201X Heat exchange pipe 202 Pipe line 203 Pipe line 205A Heat exchange pipe 205C Dispersion pipe 205D Heat exchange pipe 205E Heat exchange pipe 206 Fractionation unit 214 Heat exchange for pre-cooling Device 214A Heat-absorbed side 215 Pressure reducer 216 Check valve 220 Check valve 221 Pressure reducer 222 Check valve 260 Pump 270 Generator Heat exchanger between absorbers 271 Folding pipe line 272 Liquid reservoir 301A Open / close valve 301B Open / close valve 301C Open / close valve 301D Open / close valve

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kazuhiko Harima 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Tomohiko Kato 2-chome, Keihan-hondori, Moriguchi-shi, Osaka No. 5-5 Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. A first path for supplying an absorbing liquid, which has absorbed a refrigerant vapor in an absorbing functional portion, to a generating functional portion for evaporating the refrigerant vapor from the absorbing liquid, and a refrigerant path in the generating functional portion. An absorption liquid circulation system that circulates the absorption liquid by a second path that gives the evaporated absorption liquid to the absorption function portion, and absorption that performs heat exchange between the first path and the second path. An absorption type refrigeration system provided with a liquid heat exchange function part, wherein the temperature of the absorption liquid given to the absorption function part is adjusted to a predetermined value by adjusting the heat exchange amount of the absorption liquid heat exchange function part. An absorption type refrigeration system comprising a heat exchange amount adjusting means. 2. A first path for supplying the absorbing liquid, which has absorbed the refrigerant vapor in the absorbing functional portion, to the generating functional portion for evaporating the refrigerant vapor from the absorbing liquid; and the refrigerant vapor in the generating functional portion. An absorption liquid circulation system that circulates the absorption liquid by a second path that gives the evaporated absorption liquid to the absorption function portion, and absorption that performs heat exchange between the first path and the second path. An absorption type refrigeration system provided with a liquid heat exchange function part, wherein a third route is provided to branch the second route to bypass the absorbed liquid heat exchange function part, and the third route. And a branch flow rate adjusting means for adjusting the flow rate of the flow rate adjusting function section to adjust the temperature of the absorbing liquid applied to the absorbing function section to a predetermined value. An absorption type refrigerating device. 3. A first path for supplying the absorbing liquid, which has absorbed the refrigerant vapor in the absorbing functional portion, to the generating functional portion for evaporating the refrigerant vapor from the absorbing liquid; and the refrigerant vapor in the generating functional portion. An absorption liquid circulation system that circulates the absorption liquid by a second path that gives the evaporated absorption liquid to the absorption function portion, and absorption that performs heat exchange between the first path and the second path. An absorption type refrigeration system provided with a liquid heat exchange function part, wherein a third route is provided to branch the first route to bypass the absorbed liquid heat exchange function part, and the third route. And a branch flow rate adjusting means for adjusting the temperature of the absorbing liquid applied to the absorbing function section to a predetermined value by adjusting the flow rate of the flow rate adjusting function section. An absorption type refrigerating device.