JPH06300384A - Absorption type refrigerating machine - Google Patents

Abstract

PURPOSE:To obtain an absorption type refrigerating machine which has a construction being inexpensive and excellent in durability and which can maintain the quantities of absorbent staying in an absorber and a vapor-liquid separator, in proper ranges respectively. CONSTITUTION:Detecting means Dh and D1 for detecting a ratio dTt/dTg of a temperature difference dTt between inflow and outflow temperatures of an absorbent on the side to be heated in relation to heat exchanger parts 14 and 15 to a temperature difference dTg between inflow and outflow temperatures of an absorbent on the heating side in relation to the heat exchanger parts 14 and 15 are provided. A control means C for controlling flow ratio regulating means V2 and V1 on the basis of detected information of the detecting means Dh and D1 so that the flow rate of the absorbent on the side to be heated be large when the ratio dTt/dTg becomes larger than a set value and that the flow rate of the absorbent on the heating side be small when the ratio dTt/dTg becomes smaller than the set value, is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorber, a regenerator having a gas-liquid separator, a first absorption liquid passage for supplying the absorption liquid in the absorber to the regenerator, and the gas-liquid. The second absorption liquid passage for supplying the absorption liquid separated by the separator to the absorber, and the heating-side absorption liquid flowing through the second absorption liquid passage for the first absorption liquid passage.
A heat exchange unit that heats the heated absorption liquid flowing through the absorption liquid passage, and a flow ratio adjusting unit that adjusts the ratio between the flow rate of the heating absorption liquid and the flow amount of the heated absorption liquid are provided. Absorption type refrigerator.

[0002]

2. Description of the Related Art In such an absorption refrigerating machine, the absorption liquid accumulated in each of the absorber and the gas-liquid separator causes a gap between the absorber and the regenerator and a gap between the gas-liquid separator and the absorber. Is hermetically sealed to maintain the absorber pressure below the regenerator pressure. The pressure difference between the absorber and the regenerator (hereinafter sometimes simply referred to as pressure difference) is
Although it fluctuates due to disturbance (for example, a change in the temperature of the cooling water flowing in the absorber), the amount of retention of the absorption liquid in each of the absorber and the gas-liquid separator (hereinafter, the retention liquid is changed according to the pressure difference). Sometimes referred to as quantity) also varies. When the amount of the retained liquid in the absorber becomes too small, the amount of the absorbed liquid supplied to the regenerator becomes insufficient, and the amount of the absorbed liquid in the regenerator becomes too small, which may cause the regenerator to become an empty state. . Further, when the amount of the staying liquid in the gas-liquid separator becomes too small, the refrigerant vapor generated in the regenerator leaks into the second absorption liquid passage, and the leaked refrigerant vapor is absorbed again in the absorption liquid, so that the evaporator is evaporated. As a result, the amount of refrigerant supplied to the cylinder is reduced, and as a result, the refrigerating capacity is reduced. In addition, if the amount of staying liquid in the gas-liquid separator becomes excessively large, separation failure between the absorbing liquid and the refrigerant liquid occurs,
The absorption liquid mixes with the refrigerant liquid, and as a result, the refrigerating capacity decreases.

Therefore, as described above, in order to prevent the regenerator from being in an empty state and the refrigerating capacity from being deteriorated, conventionally, the absorbing liquid accumulated in each of the absorber and the gas-liquid separator is conventionally used. The liquid level sensor for detecting the liquid level of is provided, and based on the detection information of these liquid level sensors, the flow ratio adjusting means is controlled,
The amount of retained liquid in each of the absorber and the gas-liquid separator was kept within an appropriate range. That is, when the amount of the staying liquid in the absorber is smaller than the proper range, the flow rate of the heated side absorbent is small, and when it is larger than the proper range, the flow rate of the heated side absorbent is large. It controlled the adjustment means. Further, when the amount of the staying liquid in the gas-liquid separator is smaller than the proper range, the flow rate of the heated absorption liquid is large, and when it is larger than the proper range, the flow amount of the heated absorption liquid is small. The flow ratio adjusting means was controlled.

[0004]

However, since the gas-liquid separator is in a high temperature and high pressure state, the performance of the liquid level sensor provided in the gas liquid separator is rapidly deteriorated, and improvement in durability has been desired. Further, the absorbing liquid of the gas-liquid separator is in a boiling state, and the detection variation of the liquid level sensor is large. Therefore, the appropriate range is intentionally set to be narrow in order to prevent a delay in the procedure for avoiding the retention amount of the absorbing liquid in the gas-liquid separator from deviating from the appropriate range. There was a problem that it might be taken. In addition, when installing the liquid level sensor, the detection part must be installed inside the absorber and the gas-liquid separator, and the detection information must be provided to the outside. It has the disadvantage of high cost.

By the way, as a sign that the retention amount of the absorbing liquid in the absorber and the gas-liquid separator deviates from the proper range,
Since the flow rate of the heated absorption liquid flowing through the absorption liquid passage and the flow amount of the heating absorption liquid flowing through the second absorption liquid passage are unbalanced, the first absorption liquid passage and the second absorption liquid passage respectively. Flow rate sensors are provided in the, and based on the detection information of those flow rate sensors,
Controlling the flow ratio adjusting means so that the flow rate of the heated side absorbent and the flow rate of the heated side absorbent are approximately the same to maintain the amount of staying liquid in each of the absorber and the gas-liquid separator within an appropriate range. Is assumed. However, the flow rate sensor is expensive, and when installing the flow rate sensor, the detection portion must be provided inside the flow path and the detection information must be provided outside the flow path. There is a drawback in that the cost for installing the

The present invention has been made in view of the above circumstances, and its purpose is to provide an absorbent liquid in each of the absorber and the gas-liquid separator with a structure that is inexpensive and has excellent durability. An object of the present invention is to provide an absorption refrigerating machine capable of maintaining the amount of staying in the appropriate range.

[0007]

The absorption refrigerating machine according to the present invention is characterized in that the temperature difference between the inflow temperature and the outflow temperature of the heated absorption liquid with respect to the heat exchanging portion and the heat exchanging portion with respect to the heat exchanging portion. Detecting means for detecting the ratio of the temperature difference between the inflow temperature and the outflow temperature of the heating-side absorbing liquid is provided, and when the ratio becomes larger than the set value based on the detection information of the detecting means, the heated object is heated. Control for controlling the flow rate ratio adjusting means so that the flow rate of the side absorption liquid becomes large and the flow rate of the heated side absorption liquid becomes small when the ratio becomes smaller than the set value. Means are provided.

[0008]

The operation of the above-described characteristic structure is as follows. When the flow rate of the heated absorption liquid becomes smaller than that of the heating absorption liquid, that is, when the ratio Rt / Rg of the flow amount Rt of the heated absorption liquid and the flow amount Rg of the heating absorption liquid becomes small, those flow rates are reduced. The temperature rise of the heated side absorption liquid in the heat exchange part is larger than that at the same time, that is, the inflow temperature Tti and the outflow temperature Tto of the heated side absorption liquid to the heat exchange part.
And the temperature difference (hereinafter referred to as the heated side temperature difference) dTt
Since (= Tto-Tti) becomes large, the temperature difference dTg between the heated side temperature difference dTt and the inflow temperature Tgi and the outflow temperature Tgo of the heating side absorption liquid to the heat exchange section (hereinafter referred to as the heating side temperature difference) dTg. Ratio dT with (= Tgi-Tgo)
t / dTg becomes large. On the contrary, when the flow rate of the heated side absorption liquid is larger than that of the heating side absorption liquid, that is, when the ratio Rt / Rg of the flow rates is increased, the heat exchange section is compared with those when the flow rates are almost the same. In this case, the temperature rise of the absorbed liquid on the heated side becomes small, that is, the temperature difference dTt on the heated side becomes small, so the ratio dTt / dTg of the temperature difference becomes small. Therefore, the flow rate ratio Rt / Rg and the temperature difference ratio dTt / dTg are in inverse proportion.

This characteristic configuration is based on the above viewpoint. That is, based on the detection information of the detection means for detecting the temperature difference ratio dTt / dTg, the control means, when the temperature difference ratio dTt / dTg becomes larger than the set value,
The flow rate ratio is set so that the flow rate of the absorbed liquid on the heated side becomes large and the flow rate of the absorbed liquid on the heated side becomes small when the ratio dTt / dTg of the temperature differences becomes smaller than the set value. Control the adjusting means.

As a concrete structure of the detecting means, for example, a temperature sensor for detecting an inflow temperature and an outflow temperature of the heated side absorption liquid flowing through the first absorption liquid passage to the heat exchange part, and a second sensor A temperature sensor is provided for detecting the inflow temperature and the outflow temperature of the heating side absorbing liquid flowing through the absorbing liquid passage to the heat exchange section, and the temperature difference ratio dTt / dTg is calculated based on the detection information of each temperature sensor. It is configured to calculate. The temperature sensor can be provided so as to detect the temperature of the outer peripheral portion of the conduit for forming the flow paths of the first absorption liquid channel and the second absorption liquid channel.

[0011]

Therefore, the precursor of the amount of residence of the absorbing liquid in the absorber and the gas-liquid separator deviating from the proper range, that is, the first
As described above, the temperature difference between the heated side absorption liquid flowing through the absorption liquid passage and the heating side absorption liquid flowing through the second absorption liquid passage is unbalanced by the detection means. By detecting the ratio of, it has become possible to surely detect. Further, since the temperature sensor that specifically constitutes the detecting means is inexpensive and is provided outside the conduits for forming the flow paths of the first absorbing liquid passage and the second absorbing liquid passage, the temperature sensor can be easily provided. It can be provided, and there is almost no performance deterioration. As a result, it has become possible to reliably maintain the amount of retention of the absorbing liquid in each of the absorber and the gas-liquid separator within an appropriate range with a configuration that is inexpensive and has excellent durability.

[0012]

EXAMPLE An example in which the present invention is applied to a double-effect absorption refrigerator will be described below with reference to FIG. First,
The overall configuration of the double-effect absorption refrigerator will be described.

A vertical cylindrical high temperature regenerator gas-liquid separator 2 is arranged above the high temperature regenerator 1 for heating the absorbing liquid by the burner B, and the peripheral portion of the high temperature regenerator gas liquid separator 2 is arranged. A vertical low temperature regenerator 3 is disposed in the low temperature regenerator 3, a low temperature regenerator gas-liquid separator 4 is disposed above the low temperature regenerator 3, and a vertical absorber 5 is disposed around the low temperature regenerator 3. An evaporator 6 is arranged below the absorber 5 and a condenser 7 is arranged above the absorber 5.

The high temperature regenerator 1 is connected to the high temperature regenerator gas-liquid separator 2 through the ascending flow path 8 of the refrigerant vapor and the absorbing liquid, and the low temperature regenerator 3 is connected.
And the low temperature regenerator gas-liquid separator 4 are communicated with each other.
In order to supply a low-concentration absorption liquid (hereinafter, sometimes referred to as a dilute liquid) from the absorber 5 to the high temperature regenerator 1, the absorption liquid reservoir 5a below the absorber 5 and the high temperature regenerator 1 are connected to a solution pump. A high-temperature regenerator gas-liquid is connected to the high-temperature regenerator 1 to supply a medium-concentration absorbing liquid (hereinafter, also referred to as medium liquid) from the high-temperature regenerator 1 to the low-temperature regenerator 3 by connecting the dilute liquid supply path 10 via The separator 2 and the lower part of the low temperature regenerator 3 are connected by a medium liquid supply path 11 so as to supply a high-concentration absorption liquid (hereinafter also referred to as a concentrated liquid) from the low temperature regenerator 3 to the absorber 5. , Low temperature regenerator gas-liquid separator 4
And the absorbent sprayer 12 on the upper part of the absorber 5 between the concentrated liquid supply passage 1
Connected with 3.

A high temperature heat exchanger 14 for heating the dilute liquid flowing through the dilute liquid supply passage 10 by the dilute liquid flowing through the dilute liquid supply passage 11.
And a low temperature heat exchanger 15 for heating the dilute liquid flowing through the dilute liquid supply passage 10 by the dilute liquid flowing through the dilute liquid supply passage 13.

The partition 16 for partitioning the high temperature regenerator gas-liquid separator 2 and the low temperature regenerator 3 is used to heat the absorption liquid in the low temperature regenerator 3 with the refrigerant vapor in the high temperature regenerator gas liquid separator 2. It is formed on the heat transfer wall so that the refrigerant liquid generated by the condensation on the inner surface of the partition wall 16 flows down to the refrigerant liquid storage portion 2 a between the partition wall 16 and the inner cylinder 17.

Refrigerant liquid storage section 2 of high temperature regenerator gas liquid separator 2
a and the condenser 7 are connected by the refrigerant liquid supply passage 18, the low temperature regenerator gas-liquid separator 4 and the condenser 7 are connected by the refrigerant vapor supply passage 19, and the refrigerant liquid storage portion 7a below the condenser 7 is connected. And the refrigerant liquid spraying tool 20 of the evaporator 6 are connected by a refrigerant liquid supply passage 21. Further, the evaporator 6 and the absorber 5 are communicated with each other.

The cooling water from the cooling water supply source 22 is absorbed by the absorber 5.
The cooling coil 23 and the cooling coil 24 are connected so that the cooling coil 23 inside the condenser 7 supplies the cooling coil 24 inside the condenser 7, and the cooling water supply path 25 is connected to them. The cooled coil 26 and the cooling target 27 are connected to each other by a cold water supply passage 28 having a pump so that the cold water from the cooled coil 26 in the evaporator 6 is supplied to the cooling target 27.

That is, the refrigerant vapor generated from the absorbing liquid in the high temperature regenerator 1 is condensed in the high temperature regenerator gas-liquid separator 2, the refrigerant liquid is supplied to the condenser 7, and is generated from the absorbing liquid in the low temperature regenerator 3. The refrigerant vapor is supplied to the condenser 7, and the refrigerant vapor is condensed by the action of the cooling coil 24.
Then, the refrigerant liquid stored in the refrigerant liquid storage section 7a is
It is configured to be sprayed in the evaporator 6 by the refrigerant liquid spraying tool 20, the sprayed refrigerant liquid is evaporated by the action of the cooled coil 26, and the vaporization heat cools the water flowing through the cooled coil 26. I am doing it.

On the other hand, the absorption liquid from the low-temperature regenerator gas-liquid separator 4 is sprayed into the absorber 5 by the absorption liquid spraying tool 12 so that the sprayed absorption liquid absorbs the refrigerant vapor generated in the evaporator 6. ,
The absorption liquid that has absorbed the refrigerant vapor is sequentially supplied to the high temperature regenerator 1, the high temperature regenerator gas-liquid separator 2, the low temperature regenerator 3, and the low temperature regenerator gas-liquid separator 4 to separate the refrigerant and separate the refrigerant. The absorbent is sprayed into the absorber 5 by the absorbent sprayer 12. That is, a circulation cycle in which the absorbing liquid is circulated in the order of the high temperature regenerator 1, the high temperature regenerator gas-liquid separator 2, the low temperature regenerator 3, the low temperature regenerator gas-liquid separator 4, the absorber 5, and the high temperature regenerator 1 is circulated. It is configured as follows. The absorption heat generated by the absorption liquid absorbing the refrigerant vapor in the absorber 5 is given to the water flowing through the cooling coil 23 and taken out to the outside.

Next, a description will be given of a constitution which is a characteristic constitution of the present invention, for maintaining the retention amount of the absorbing liquid in each of the absorber and the gas-liquid separator within an appropriate range.

A dilute liquid flow rate adjusting valve V ₁ for adjusting the flow rate of the dilute liquid flowing through the dilute liquid supply passage ₁₀ and a medium liquid flow rate adjusting valve V ₂ for adjusting the flow rate of the dilute liquid flowing through the dilute liquid supply passage 11. A flow rate adjusting valve V ₃ for adjusting the input amount of fuel such as natural gas supplied to the burner B is provided.

Further, the temperature sensors S ₁ and S ₂ for detecting the inflow temperature Tti (h) and the outflow temperature Tto (h) of the dilute liquid flowing through the dilute liquid supply passage 10 to the high temperature heat exchanger 14, the medium liquid, respectively. High temperature heat exchanger 1 for medium liquid flowing through the supply path 11
Inflow temperature Tgi (h) and outflow temperature Tgo for 4
(H) Temperature sensors S ₃ and S ₄ for detecting each of them are provided. Further, a temperature sensor S ₅ for detecting an inflow temperature Tti (l) of the rare liquid flowing through the rare liquid supply passage 10 into the low temperature heat exchanger 15, and a concentration flowing through the concentrated liquid supply passage 13 for the low temperature heat exchanger 15. Liquid inflow temperature Tgi (l) and outflow temperature Tg
Temperature sensors S ₆ and S ₇ for detecting each o (l) are provided. The temperature Tti (h) detected by the temperature sensor S ₁
To the low temperature heat exchanger 15 for the rare liquid flowing through the rare liquid supply passage 10.
Since it is used as the outflow temperature Tto (l) for the temperature sensor S in the following description, the temperature sensor S is used for the sake of clarity.
The detected temperature of ₁ is described as both Tti (h) and Tto (l).

Further, a cooling water temperature sensor S ₈ for detecting the temperature Tw of the cooling water flowing into the cooling coil 23 is provided.

C in the figure shows a control unit using a microcomputer, and the control unit C controls the circulation amount for controlling the circulation amount of the absorbing liquid and the dilute liquid flowing through the dilute liquid supply passage 10. The ratio of the flow rate to the flow rate of the medium solution flowing through the medium solution supply path 11, and the flow rate of the dilute solution flowing through the dilute solution supply path 10 and the flow rate of the concentrated solution flowing through the concentrated solution supply path 13. The flow rate ratio control for controlling the ratio is executed.

First, the circulation amount control will be described. The control unit C stores the target opening degrees of the rare liquid flow rate adjusting valve V ₁ and the medium liquid flow rate adjusting valve V ₂ which are preset according to the input amount and the cooling water temperature Tw. Then, in order to adjust the input amount according to the required refrigerating capacity,
The flow rate adjusting valve V ₃ is controlled. Further, based on the input amount and the cooling water temperature Tw detected by the cooling water temperature sensor S ₈ , the opening of each of the dilute liquid flow rate adjusting valve V ₁ and the medium liquid flow rate adjusting valve V ₂ is controlled to the target opening. , Control the circulation rate of the absorption liquid.

Next, the flow rate control will be described. Temperature difference dTt (h) = Tto between the temperature Tti (h) detected by the temperature sensor S _{1 and} the temperature Tto (h) detected by the temperature sensor S _2.
(H) -Tti (h) and the temperature T detected by the temperature sensor S _3.
The ratio dTt (h) / dTg (h) of the temperature difference dTg (h) = Tgi (h) −Tgo (h) between gi (h) and the detected temperature Tgo (h) of the temperature sensor S ₄ is calculated. And
When the calculated ratio dTt (h) / dTg (h) becomes larger than the set value, that is, when the flow rate of the dilute solution becomes smaller than that of the middle solution, the middle solution flow rate adjustment is performed at every set time until the set value is returned. Valve V
_The control of decreasing the opening of ₂ by the set opening (reducing the flow rate of the medium liquid by the set amount) is executed, and the calculated ratio dTt
When (h) / dTg (h) becomes smaller than the set value, that is, when the flow rate of the dilute solution becomes larger than that of the middle solution, the middle solution flow rate adjusting valve V ₂ of the middle solution flow rate control valve V ₂ is set at every set time until the set value is returned. The control is executed to increase the opening by the set opening (increase the flow rate of the medium liquid by the set amount).

The temperature Tti detected by the temperature sensor S ₅
(L) and the detected temperature Tto (l) of the temperature sensor S ₁ dTt (l) = Tto (l) −Tti (l), the detected temperature Tgi (l) of the temperature sensor S ₆ and the temperature sensor S ₉
Temperature difference between the detected temperature Tgo (l) and dTg (l) = Tg
Ratio of i (l) -Tgo (l) dTt (l) / dTg
Calculate (l). Then, the calculated ratio dTt (l) /
When dTg (l) becomes larger than the set value, that is, when the flow rate of the dilute liquid becomes smaller than that of the concentrated liquid, the opening degree of the dilute liquid flow rate adjusting valve V ₁ is set every set time until the set value is returned. The control is executed to increase the opening degree (to increase the flow rate of the dilute solution by the set amount), and when the calculated ratio dTt (l) / dTg (l) becomes smaller than the set value, that is, When the flow rate of the dilute liquid becomes larger than that of the liquid, the opening of the dilute liquid flow control valve V ₁ is decreased by the set opening at each set time until the set value is returned (the flow of the dilute liquid is decreased by the set amount. Execute the control.

Therefore, the dilute liquid supply passage 10 functions as a first absorption liquid passage for supplying the absorption liquid in the absorber 5 to the high temperature regenerator 1. The middle liquid supply passage 11 supplies the middle liquid separated in the high temperature regenerator gas-liquid separator 2 to the absorber 5 via the low temperature regenerator 3, and therefore functions as a second absorption liquid passage,
Further, the concentrated liquid supply passage 13 supplies the concentrated liquid separated by the low temperature regenerator gas-liquid separator 4 to the absorber 5, and therefore,
It functions as a second absorption liquid channel.

Further, the high temperature heat exchanger 14 includes the medium liquid supply passage 11
The dilute liquid supply path 10 is formed by the medium liquid (heating side absorbing liquid) flowing through
The low-temperature heat exchanger 15 functions as a heat exchange part for heating the diluted liquid (absorption liquid to be heated) flowing through the low-temperature heat exchanger 15.
Dilute liquid supply path 1 by the concentrated liquid flowing through 3 (absorption liquid on the heating side)
It functions as a heat exchange part for heating the dilute liquid (heated side absorption liquid) flowing through 0. In addition, the medium liquid flow rate adjusting valve V ₂ is used to adjust the flow rate of the heating side absorption liquid flowing through the medium liquid supply passage 11 and the dilute liquid supply passage 1.
0, which functions as a flow rate ratio adjusting means for adjusting the ratio with the flow rate of the heated absorption liquid flowing through the heating side, and the rare liquid flow rate adjusting valve V ₁ is a flow rate of the heating absorption liquid flowing through the concentrated liquid supply passage 13. It functions as a flow ratio adjusting means for adjusting the ratio of the flow rate of the heated side absorption liquid flowing through the rare liquid supply passage 10.

Further, the temperature sensors S ₁ , S ₂ , S ₃ , S ₄ ,
Also, the control unit C controls the temperature difference dTt (h) between the inflow temperature and the outflow temperature of the heated side absorption liquid to the high temperature heat exchanger 14.
And the ratio dTt (h) of the temperature difference dTg (h) between the inflow temperature and the outflow temperature of the heating side absorption liquid to the high temperature heat exchanger 14.
/ DTg (h) detection means D on the high temperature heat exchanger side
function as h, and temperature sensors S ₅ , S ₁ , S ₆ , S
₇ , and the control unit C controls the temperature difference dTt between the inflow temperature and the outflow temperature of the heated absorption liquid into the low temperature heat exchanger 15.
The ratio dTt between (l) and the temperature difference dTg (l) between the inflow temperature and the outflow temperature of the heating side absorption liquid to the low temperature heat exchanger 15.
It functions as the detection means Dl on the low temperature heat exchanger side for detecting (l) / dTg (l).

Further, the control section C controls the medium liquid flow rate adjusting valve V ₂ based on the detection information of the detecting means Dh on the high temperature heat exchanger side, and detects the detecting means Dl on the low temperature heat exchanger side. It functions as a control means for controlling the rare-liquid flow rate adjusting valve V ₁ based on the information.

[Other Embodiments] Next, other embodiments will be listed. In the above embodiment, both the high temperature heat exchanger side detecting means Dh and the low temperature heat exchanger side detecting means Dl are provided, and the flow rate of the dilute liquid flowing through the dilute liquid supply passage 10 and the medium liquid supply passage 11 are set. Both the ratio of the flow rate of the medium solution flowing through and the ratio of the flow rate of the dilute solution flowing through the dilute solution supply path 10 to the flow rate of the concentrated solution flowing through the concentrated solution supply path 13 are controlled. Although the case where it is configured is illustrated, by providing only one of the detecting means Dh on the high temperature heat exchanger side and the detecting means Dl on the low temperature heat exchanger side, Ratio of flow rate to flow rate of medium solution flowing through medium solution supply path 11, and rare solution supply path 1
Only one of the ratios of the flow rate of the dilute liquid flowing through 0 and the flow rate of the concentrated liquid flowing through the concentrated liquid supply passage 13 may be controlled. The detection means D on the high temperature heat exchanger side
When h is not provided, it is not necessary to provide the medium liquid flow rate adjusting valve V ₂ .

Solution pump 9 and dilute solution flow rate control valve V ₁
In place of the above, an inverter type pump capable of adjusting the discharge amount is provided, and the concentrated liquid supply passage 13 is provided by this inverter type pump.
It may function as a flow rate ratio adjusting means for adjusting the ratio of the flow rate of the heating-side absorption liquid flowing through and the flow rate of the heated-side absorption liquid flowing through the dilute liquid supply passage 10. In this case, the controller C controls the inverter pump to adjust the ratio.

The absorber 5, the evaporator 6 and the condenser 7 are
The high temperature regenerator gas / liquid separator 2, the low temperature regenerator 3 and the low temperature regenerator gas / liquid separator 4 may be separately installed.

The refrigerant and the absorbing liquid can be appropriately selected from known ones.

In the above embodiment, the case where the present invention is applied to the double-effect absorption refrigerator is illustrated, but it is also possible to apply the present invention to a single-effect absorption refrigerator.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a block diagram of a double-effect absorption refrigerator.

[Explanation of symbols]

1,3 Regenerator 2,4 Gas-liquid separator 5 Absorber 10 First absorption liquid channel 11,13 Second absorption liquid channel 14,15 Heat exchange section dTt, dTg Temperature difference dTt / dTg ratio C Control means Dh, Dl Detection means V ₁ , V ₂ Flow rate ratio adjustment means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideki Tani 4-1-2, Hirano-cho, Chuo-ku, Osaka City, Osaka Prefecture Osaka Gas Co., Ltd.

Claims (1)

[Claims] 1. An absorber (5) and a gas-liquid separator (2),
Regenerators (1) and (3) provided with (4), and a first absorption liquid channel (10) for supplying the absorption liquid in the absorber (5) to the regenerators (1) and (3). , The gas-liquid separator (2),
Flowing through the second absorption liquid passages (11) and (13) for supplying the absorption liquid separated in (4) to the absorber (5) and the second absorption liquid passages (11) and (13). Heat exchange parts (14) and (15) for heating the heated absorption liquid flowing through the first absorption liquid passage (10) by the heating absorption liquid to be heated, the flow rate of the heating absorption liquid and the heated liquid. An absorption type refrigerator provided with flow rate ratio adjusting means (V ₂ ) and (V ₁ ) for adjusting the ratio with the flow rate of the side absorption liquid, wherein the heat exchangers (14) and (15) are connected to the heat exchangers (14) and (15). A temperature difference (dTt) between the inflow temperature and the outflow temperature of the heated absorption liquid,
Detection means (Dh), (Dh) for detecting the ratio (dTt / dTg) of the temperature difference (dTg) between the inflow temperature and the outflow temperature of the heating side absorption liquid to the heat exchange sections (14), (15).
1) is provided, and when the ratio (dTt / dTg) becomes larger than the set value based on the detection information of the detection means (Dh) and (Dl), the flow rate of the heated side absorption liquid becomes large. And when the ratio (dTt / dTg) becomes smaller than the set value, the flow ratio adjusting means (V ₂ ), (V An absorption chiller provided with control means (C) for controlling ₁ ).