JP2768630B2 - Absorption refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating amount adjusting means for adjusting a heating amount of a heating means for heating a regenerator, a cooling water cooling tower provided with a cooling electric fan for passing outside air as cooling air, and Flow means for circulating cooling water is provided between the cooling water cooler, the absorber and the condenser, and a control means for adjusting the cooling capacity of the cooling water to be larger as the heating amount is increased is provided. To an absorption type refrigerator.

[0002]

2. Description of the Related Art In such an absorption refrigerator, the cooling capacity of the cooling water is adjusted in accordance with the heating amount of the regenerator which is adjusted in accordance with the load. By adjusting the capacity to a large extent, good operation can be performed. In other words, if the cooling capacity is insufficient with respect to the heating amount, the absorption capacity of the absorber and the condensation capacity of the condenser will be insufficient, and not only the desired refrigeration capacity will not be exhibited, but also the condenser and the regenerator will be abnormal. High temperature and high pressure may cause damage to the equipment,
If the cooling capacity is excessive with respect to the heating amount, the absorbing capacity of the absorber and the condensing capacity of the condenser may be excessive, and the refrigerant may be easily frozen in the evaporator. By the adjustment, it is possible to perform a good operation avoiding such troubles.

To adjust the cooling capacity according to the amount of heating,
Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 61-19116, a flow means (generally constituted by a flow pump) so that the flow rate of the cooling water increases as the heating amount increases. And the temperature of the cooling water supplied from the cooling water cooler to the absorber and the condenser (may be abbreviated as the incoming water temperature in the following description).
When the incoming water temperature is lower than the rated value based on the temperature detected by the cooling water temperature detecting means, the flow rate of the cooling water is adjusted to the decreasing side, and the incoming water temperature becomes higher than the rated value. In such a case, the cooling capacity is adjusted to a capacity suitable for the amount of heating by adjusting the flow rate of the cooling water to the increasing side. In short, in this conventional example, the cooling capacity is adjusted to match the heating amount by adjusting the flow rate of the cooling water while operating the cooling tower in a constant operation state.

[0004]

According to the above-mentioned conventional means, since the incoming water temperature varies depending on the operating conditions such as the load condition of the refrigerator and the outside air condition, there is a possibility that proper cooling cannot be performed depending on the operating conditions. was there. To add an explanation, for example, if the incoming water temperature drops extremely when the heating amount is low, the flow rate of the cooling water may need to be adjusted to a value close to zero in some cases. However, because it is necessary to detect and control the incoming water temperature, that is, to accurately detect a change in the incoming water temperature due to a change in the operating conditions, the flow rate of the cooling water may drop below the set lower limit water amount. It will not be possible. Therefore, the flow rate of the cooling water may be larger than the required flow rate of the cooling water, and as a result, due to excessive cooling,
Refrigerant may be frozen.

In the case of the above-mentioned conventional means, the flow rate of a flow pump as a flow means is generally adjusted by adjusting the rotation speed of an electric motor for driving the flow pump by inverter control. However, since a large amount of power is required to flow the cooling water, a large-capacity inverter is required, and there is a disadvantage that the initial cost is increased.

[0006] Further, in an absorption refrigerator, in general, heat is exchanged between a regenerating absorbent to be sent from the absorber to the regenerator and a regenerated absorbent to be sent from the regenerator to the absorber to preheat the regenerating absorbent. Although a heat exchanger will be provided, in the above-mentioned conventional means, when the heating amount is low as described above, the incoming water temperature is extremely lowered, and the flow rate of the cooling water is larger than the required flow rate. In such a case, the temperature of the absorbent to be regenerated sent from the absorber to the regenerator decreases, and as a result, the temperature of the regenerated absorbent having a high concentration also decreases, thereby causing crystallization of the absorbent in the heat exchanger. There was fear. This problem is remarkable in the case of a double-effect absorption refrigerator.

That is, the double-effect absorption refrigerator has a high-temperature regenerator heated by heating means and a low-temperature regenerator through which refrigerant separated from a gas-liquid separation section of the high-temperature regenerator flows as a regenerator. And, as a heat exchanger, heat exchange is performed between the regenerating absorbent to be sent from the absorber to the high-temperature regenerator and the regenerated absorbent to be sent from the high-temperature regenerator to the low-temperature regenerator, and A high-temperature heat exchanger for preheating the absorbent, and a low-temperature heat exchanger for preheating the absorbent to be regenerated by exchanging heat between the absorbent for regeneration and the regenerated absorbent sent from the low-temperature regenerator to the absorber. In other words, the regenerated absorbent sent from the low-temperature regenerator to the absorber has a very high concentration, and
Since the temperature is low, the risk of crystallization of the absorbing solution in the low-temperature heat exchanger becomes significant.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to enable good cooling while properly avoiding freezing of a refrigerant. Another object is to reduce the initial cost for cooling. Yet another object is to avoid crystallization of the absorbent in the heat exchanger.

[0009]

An absorption refrigerator according to the present invention comprises a heating amount adjusting means for adjusting a heating amount of a heating means for heating a regenerator, and a cooling electric fan for passing outside air as cooling air. Cooling water cooling tower, and a flow means for circulating cooling water over the cooling water cooling tower, the absorber and the condenser, and the cooling capacity by the cooling water increases as the heating amount increases. The first characteristic configuration is provided with a cooling water temperature detecting means for detecting a temperature of cooling water supplied from the cooling water cooler to the absorber and the condenser. The control means, the temperature of the cooling water supplied to the absorber and the condenser from the cooling water cooler, while maintaining the flow rate of the cooling water by the flow means at a set flow rate, The lower the heating amount, the lower So as to maintain the set target temperature, in that it is configured to adjust the cooling capacity of the cooling water cooler on the basis of the detection information of the coolant temperature detecting means.

The second characteristic configuration specifies a specific configuration suitable for implementing the first characteristic configuration, wherein the cooling water cooler controls the cooling capacity by adjusting the rotation speed of the electric cooling fan. The point is that it is configured to adjust.

The third characteristic configuration specifies a preferred specific configuration in the implementation of the first and second characteristic configurations, and the control unit is configured to detect a load based on detection information of a load detection unit that detects a load. Thus, the configuration is such that the heating amount adjusting means is adjusted so that the heating amount increases as the load increases.

A fourth characteristic structure is the first, second and third features.
It is intended to specify a preferred specific configuration in the implementation of the characteristic configuration, and heat exchange between the regeneration target absorption liquid to be sent from the absorber to the regenerator and the regenerated absorption liquid sent from the regenerator to the absorber. And a heat exchanger for preheating the absorbent to be regenerated.

A fifth characteristic configuration specifies a preferred specific configuration in the implementation of the fourth characteristic configuration, wherein the regenerator is a high-temperature regenerator heated by the heating means and the high-temperature regenerator A low-temperature regenerator through which the separated refrigerant from the gas-liquid separation section flows, wherein the heat exchanger is an object liquid to be regenerated from the absorber to the high-temperature regenerator and the low-temperature regenerator from the high-temperature regenerator A high-temperature heat exchanger for preheating the absorbent to be regenerated by exchanging heat with the regenerated absorbent to be sent to the regenerating absorbent, and a heat exchange between the regenerated absorbent to be sent from the low-temperature regenerator to the absorbent from the low-temperature regenerator. And a low-temperature heat exchanger for preheating the absorbent to be regenerated.

[0014]

The operation of the first characteristic configuration is as follows. Adjustment of the cooling capacity of the cooling water in accordance with the amount of heating is performed while maintaining the flow rate of the cooling water at the set flow rate, while maintaining the temperature of the cooling water supplied from the cooling water cooler to the absorber and the condenser (the following (Which may be abbreviated as the inlet water temperature in the description) at a target temperature set lower as the heating amount increases. Maintaining the incoming water temperature at the target temperature is performed by adjusting the cooling capacity of the cooling water cooler based on the detection information of the cooling water temperature detecting means for detecting the incoming water temperature.

Since the flow rate of the cooling water is maintained at the set flow rate, the change in the incoming water temperature due to the change in the operating conditions is accurately detected, and the incoming water temperature is set to an appropriate target value corresponding to the heating amount. Since the temperature can be maintained, the absorption capacity of the absorber and the condensation capacity of the condenser can be maintained in an appropriate state according to the amount of heating, and freezing of the refrigerant in the evaporator can be properly avoided.

The operation of the second feature configuration is as follows. In the second characteristic configuration, the cooling capacity of the cooling water cooling tower is adjusted by adjusting the rotation speed of the electric cooling fan. In other words, as adjustment of the cooling capacity of the cooling water cooling tower,
For example, it is conceivable to provide damper means for changing the size of the outside air intake and an actuator such as an electric motor for adjusting the damper while the cooling electric fan is rotated at the rated speed. However, since the cooling capacity is adjusted by adjusting the number of revolutions of the cooling electric fan that is originally provided, the configuration can be simplified. Although the rotation speed of the electric cooling fan is generally controlled by inverter control, the electric cooling fan requires less power than a flow pump as a flow means for flowing cooling water. Therefore, an inverter having a smaller capacity than that of the flow pump can be used, and the configuration can be reduced in cost as compared with the conventional configuration in which the flow pump is inverter-controlled.

The operation of the third feature is as follows. In the third characteristic configuration, a specific configuration of the heating amount adjustment is shown. The heating amount is automatically adjusted based on the detection information of the load detection unit, and the target temperature of the incoming water temperature is set accordingly. You. In other words, the absorption type refrigerator is generally operated so as to maintain the liquid to be loaded (generally water) flowing through the evaporator at the set temperature. For example, the load is detected by detecting the temperature of the liquid to be loaded. By detecting and adjusting the heating amount according to the load, as a result,
The heating amount of the heating means and the cooling capacity of the cooling water can be automatically and appropriately maintained regardless of the load fluctuation.

The operation of the fourth characteristic configuration is as follows. In other words, the absorption refrigerator generally includes a heat exchanger. However, as described in the first characteristic configuration, when the heating amount is low, the cooling water input temperature can be increased. When the temperature of the liquid to be regenerated sent from the vessel to the regenerator becomes low, it is possible to avoid crystallization of the absorbing liquid which is likely to occur in the heat exchanger.

The operation of the fifth characteristic configuration is as follows. This fifth characteristic configuration specifies a double-effect absorption refrigerator, and as described in the fourth characteristic configuration, when the heating amount is low, the cooling water input temperature can be increased.
When the temperature of the liquid to be regenerated sent from the absorber to the regenerator becomes low, it is possible to avoid crystallization of the absorbing liquid which is likely to occur in the low-temperature heat exchanger.

[0020]

According to the first characteristic configuration, the absorbing capacity of the absorber and the condensing capacity of the condenser are maintained in an appropriate state in accordance with the amount of heating regardless of the fluctuation of the operating conditions, and the refrigerant in the evaporator is maintained. Since the freezing can be properly avoided, the refrigerant can be favorably used in a state where the freezing of the refrigerant in the evaporator is properly avoided even under the use condition where the operating condition is poor.

According to the second characteristic configuration, the cooling capacity of the cooling water cooling tower is originally provided, and the cooling power of the cooling water cooling tower can be reduced by adjusting the number of rotations of the electric cooling fan, which requires less power than the flow of the cooling water. , The initial cost can be reduced.

According to the third characteristic configuration, the heating amount of the heating means and the cooling capacity of the cooling water can be automatically and appropriately maintained irrespective of the load fluctuation, and can be used more conveniently.

According to the fourth characteristic configuration, even when a heat exchanger is provided, it is possible to avoid crystallization of the absorbing liquid in the heat exchanger, so that there is no trouble such as operation stop due to crystallization of the absorbing liquid. It can be operated satisfactorily.

According to the fifth feature configuration, in a so-called double effect absorption refrigerator, it is possible to avoid crystallization of the absorbing solution in the low-temperature heat exchanger. In addition, it is possible to operate satisfactorily without troubles such as stoppage of operation due to crystallization of the absorbing solution.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a double effect absorption refrigerator will be described below. A is a high-temperature regenerator that heats the absorbing liquid by the burner 1 as a heating means, and has a gas-liquid separation part a at the top. B is a low-temperature regenerator through which the refrigerant vapor from the high-temperature regenerator A flows, and has a gas-liquid separator b at the top. D is an absorber, E is an evaporator, F
Is a condenser. The absorber D and the evaporator E have a structure arranged in a closed space, and a liquid reservoir 2 communicating with the evaporator E and the absorber D is provided in a lower part of the closed space. Further, the high temperature regenerator A and the low temperature regenerator B function as the regenerator 3.

In order to supply a low-concentration absorbent (which may be referred to as a diluent in the following description) as an absorbent to be regenerated from the absorber D to the high-temperature regenerator A, The high-temperature regenerator A is connected by a diluent supply path 4 as a regeneration target absorption liquid supply path, and an absorption liquid pump 5 as a regeneration target absorption liquid supply pump is interposed in the dilute liquid supply path 4. I have.

In order to supply a medium concentration absorbent (sometimes referred to as an intermediate solution in the following description) from the high temperature regenerator A to the low temperature regenerator B, the high temperature regenerator A and the lower part of the low temperature regenerator B are connected. They are connected by an intermediate liquid supply path 7a. In order to supply a high-concentration absorbent (hereinafter, also referred to as a concentrated liquid) from the low-temperature regenerator B to the absorber D, the low-temperature regenerator B and the absorber D
Is connected to the absorbing liquid spraying tool 6 at the upper portion through a concentrated liquid supply path 7b. Therefore, the middle liquid supply path 7a and the concentrated liquid supply path 7
b functions as an absorption liquid path G through which the regenerated absorption liquid flows from the regenerator 3 toward the absorber D.

A high-temperature heat exchanger 8 is provided for heating the dilute solution flowing through the diluent supply channel 4 with the dilute solution flowing through the dilute solution supply channel 7a. A low-temperature heat exchanger 9 that heats the diluted liquid flowing through the diluted liquid supply path 4 is provided. Therefore, the high-temperature heat exchanger 8 and the low-temperature heat exchanger 9
Functions as a heat exchanger N for preheating the absorbent to be regenerated by exchanging heat between the absorbent to be regenerated to be sent from the absorber D to the regenerator 3 and the regenerated absorbent to be sent from the regenerator 3 to the absorber D. .

The refrigerant / vapor supply path 1 through which the gas-liquid separator a of the high temperature regenerator A and the condenser F are piped through the low temperature regenerator B
0, the gas-liquid separator b of the low-temperature regenerator B and the condenser F are connected by the refrigerant vapor supply path 11. The refrigerant liquid storage section f of the condenser F and the refrigerant liquid spraying tool 12 of the evaporator E are connected by a refrigerant liquid supply path 13.

The cooling water from the cooling water cooling tower 14 as a cooling water supply source is supplied to the cooling coil 15 in the absorber D and the condenser F
The cooling water cooling tower 1 is supplied to the cooling coil 16 in the
4 and a cooling water supply path 17 connecting the two cooling coils 15 and 16, and a cooling water supply pump 18 as a flow means for circulating cooling water through the cooling water supply path 17 is provided. ing. The cooling water cooling tower 14 sprays the cooling water with the spraying tool 14a, and cools the cooling water by the ventilation of the cooling electric fan 14b that takes in the outside air from the outside air intake U and ventilates as cooling air. It is configured. Therefore, the cooling means R is configured to cool the absorber D and the condenser F by flowing the cooling water, with the cooling water cooling tower 14, the cooling water supply pump 18, and the two cooling coils 15, 16 as main parts. I have.

A load flow path 22 is provided between the cooling load 20 and the heat transfer coil 21 in the evaporator E, through which cold water as a liquid to be loaded flows. A load target liquid flow pump J that allows the load target liquid to flow through the evaporator E is provided with a load target liquid flow pump 23 that allows the flow of the load target liquid through the evaporator E.

That is, the refrigerant vapor generated from the absorbing liquid in the high-temperature regenerator A is supplied to the condenser F through the refrigerant vapor supply path 10, and the refrigerant vapor generated from the absorbing liquid in the low-temperature regenerator B is transmitted through the refrigerant vapor supply path 11. The refrigerant is supplied to the condenser 7 and the refrigerant vapor is condensed by the action of the cooling coil 16. Then, the refrigerant liquid stored in the refrigerant liquid storage part f is sprayed into the evaporator E by the refrigerant liquid disperser 12, and the sprayed refrigerant liquid is evaporated by the action of the heat transfer coil 21. The cooling water flowing through the heat transfer coil 21 is configured to be cooled. On the other hand, the absorbent from the low-temperature regenerator B is sprayed into the absorber D by the absorbent sprayer 6, and the sprayed absorbent absorbs the refrigerant vapor generated in the evaporator E and absorbs the refrigerant vapor. The liquid is sequentially supplied to the high-temperature regenerator A and the low-temperature regenerator B to regenerate the refrigerant in a separated state, and the regenerated absorbent is sprayed into the absorber D by the absorbent sprayer 6. I have. Then, the absorption heat generated by the absorption liquid absorbing the refrigerant vapor in the absorber D is given to the water flowing through the cooling coil 15 and taken out to the outside.

Next, the operation control configuration will be described. As shown in FIG. 2, the diluted liquid valve V2 for adjusting the flow rate of the diluted liquid flowing through the diluted liquid supply path 4 is used to adjust the supply amount of the absorbent to be regenerated to the high temperature regenerator A. A fuel valve V3 provided as adjusting means K for adjusting the input amount of fuel such as natural gas supplied to the burner 1 is provided as heating amount adjusting means L for adjusting the heating amount of the burner 1 for heating the high temperature regenerator A. Have been. Temperature Tα of absorption liquid in high-temperature regenerator A
A high-temperature regenerator temperature sensor S1 for detecting the temperature of the cooling water (abbreviated as the absorption liquid temperature in the following description) is provided, and the temperature Tβ of the cooling water supplied from the cooling water cooling tower 14 to the absorber D and the condenser F (hereinafter, referred to as Tβ). In the description, a water temperature sensor S2 is provided as a cooling water temperature detecting means for detecting a cooling water temperature, and a temperature Tγ of the cold water cooled by the heat transfer coil 21 (abbreviated as a cold water temperature in the following description). Do)
Is provided as load detection means, and a control device C as control means for managing operation control is provided.

The control device C executes the cooling operation control based on the start command of the operation section Q, and stops the cooling operation control based on the stop command.

Hereinafter, the control operation of the control device C will be described with reference to the flowchart of FIG. When the operation start is instructed by the operation operation unit Q (# 1), the start-up operation is performed until the start-up is completed (# 2, # 3).

After the start-up operation is completed, the heating control for adjusting the heating amount of the burner 1 (# 4), the diluent flow rate control for adjusting the dilute flow rate (# 5), and the cooling water inlet temperature are set. Each of the cooling controls (# 6) for maintaining the target temperature is executed until a stop command is issued (# 7).

When the stop is instructed, stop processing is executed (# 8).

The control device C basically executes the above-described control operation. Next, the control operation of each unit will be described.

In the start-up operation, combustion of the burner 1 is started, and operations of the absorption liquid pump 5, the cooling water supply pump 18, the electric cooling fan 14b, and the liquid flow pump 23 to be loaded are started. Then, while the heating amount is gradually increased from a preset operation start value, the opening of the rare liquid valve V2 and the fuel valve V3 is adjusted so that the absorption liquid supply amount increases as the absorption liquid temperature Tα increases. I do. Incidentally, when the absorption liquid supply amount or the heating amount reaches a preset steady value, the normal start-up operation is completed.

In the heating control, the heating amount Ip is adjusted by adjusting the fuel valve V3 so that the chilled water temperature Tγ, that is, the detection value of the chilled water temperature detection sensor M is maintained at the set target temperature. This control is based on a PI based on the deviation between the set target temperature and the detected value.
This is executed by the D control.

The dilute liquid flow rate control adjusts the opening degree of the dilute liquid valve V2 so that the supply amount of the dilute liquid, that is, the dilute liquid flow rate, increases as the above-mentioned dilute liquid temperature Tα increases.

In the cooling control, a target temperature M of the incoming water temperature Tβ is determined based on the heating amount Ip, and the cooling water cooling tower 14 is controlled based on the detection information of the water temperature sensor S2 so as to maintain the target temperature M. Adjust the cooling capacity. The target temperature M according to the heating amount Ip is stored in advance in the control device C as a relationship in which the target temperature M decreases as the heating amount Ip increases, and an example is shown in FIG. In the illustrated example, the heating amount Ip is set to 33.5 degrees for 200 calories and 31.5 degrees for 600 calories, and is set so as to gradually decrease between them.

Although the cooling capacity of the cooling water cooling tower 14 is not exemplified, the rotation speed of the electric cooling fan 14b is configured to be adjustable by an inverter, and the incoming water temperature Tβ detected by the water temperature sensor S2 is adjusted. PID control based on the difference between the temperature of the cooling electric fan 14 and the target temperature M
This is performed by adjusting the rotation speed of b.

In the stop process, the combustion of the burner 1 is stopped,
Absorbent pump 5, cooling water supply pump 18, electric fan 1
4b and the operation of the liquid flow pump 23 to be loaded are stopped.

[Another Embodiment] Next, another embodiment will be described. The present invention is also applicable to the single-effect absorption refrigerator shown in FIG. This single-effect absorption chiller / heater has the above-described double-effect absorption chiller except that the low-temperature regenerator B is omitted and the high-temperature heat exchanger 8 and the low-temperature heat exchanger 9 are configured as one heat exchanger N. It is configured in the same way as the refrigerator, and the same reference numerals as those in the above-described embodiment are assigned and the description thereof is omitted.

In the above-described embodiment, the case where the cooling capacity of the cooling water cooler 14 is performed by adjusting the rotation speed of the electric cooling fan 14 b has been described as an example. As the adjustment of the cooling capacity of the cooling water cooling tower 14, for example, With the cooling electric fan 14b rotated at the rated speed, the outside air intake U
Various modifications can be made, such as a configuration including a damper means for changing the size of the motor and an actuator such as an electric motor for adjusting the damper.

In the above-described embodiment, the case where the cooling coil 15 and the cooling coil 16 are connected in series to the cooling water supply path 17 has been described. Instead, the cooling coil 15 and the cooling coil 16 are connected to each other. The cooling water supply path 17 may be connected in parallel.

In the above embodiment, the case where the heating means 1 is constituted by a burner has been exemplified.
A configuration may be adopted in which a pipe through which a high-temperature fluid such as steam or high-temperature water flows is provided in the absorbing liquid. In this case, the heating amount adjusting means L can be constituted by a flow rate adjusting valve for adjusting the flow rate of the high-temperature fluid flowing through the pipeline.

In the above-described embodiment, the case where the opening degree of the diluted liquid valve V2 is adjusted as the absorbing liquid supply amount adjusting means K has been exemplified. Various configurations can be used, such as using an adjustable inverter pump and adjusting the supply amount by adjusting the discharge amount.

In the above-described embodiment, the case where the heating amount Ip is continuously adjusted has been described as an example. However, the embodiment may be implemented in a form in which the heating amount Ip is adjusted in a plurality of stages such as three stages.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a block diagram of a double-effect absorption chiller / heater.

FIG. 2 is a block diagram showing a control configuration.

FIG. 3 is a diagram showing a flowchart of a control operation.

FIG. 4 is a diagram showing a relationship between a heating amount and a target temperature.

FIG. 5 is a block diagram of a single-effect absorption water cooler / heater.

[Explanation of symbols]

 Reference Signs List 1 heating means 3 regenerator 8 low temperature heat exchanger 9 high temperature heat exchanger 14 cooling water cooler 14b electric fan for cooling A high temperature regenerator B low temperature regenerator C control means D absorber E evaporator F condenser Ip heating amount L Heating amount adjusting means M Target temperature S2 Cooling water temperature detecting means S3 Load detecting means

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeru Yoshimura 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi, Aichi Prefecture Inside Rinnai Corporation (72) Inventor Toshihiro Sato 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi, Aichi Rinnai (56) References JP-A-61-59166 (JP, A) JP-A-4-136667 (JP, A) JP-A-64-13466 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F25B 15/00 306

Claims (5)

(57) [Claims] Heating means (1) for heating a regenerator (3)
Heating amount adjusting means (L) for adjusting the heating amount (Ip) of
An electric cooling fan (14) that ventilates outside air as cooling air
b) a cooling water cooler provided with b), a flow means (18) for circulating cooling water through the cooling water cooling tower (14), the absorber (D) and the condenser (F). An absorption refrigerator provided with control means (C) for adjusting the cooling capacity of the cooling water to be larger as the heating amount (Ip) is increased, wherein the cooling water cooler (14) is provided. A cooling water temperature detecting means (S2) for detecting a temperature of the cooling water supplied to the absorber (D) and the condenser (F) from the controller; and the control means (C) is provided with the flow means (18). ), While maintaining the flow rate of the cooling water at the set flow rate, the temperature of the cooling water supplied from the cooling water cooler (14) to the absorber (D) and the condenser (F) is increased by the heating Quantity (I
The cooling capacity of the cooling water cooler (14) is adjusted based on the detection information of the cooling water temperature detecting means (S2) so as to maintain the target temperature (M) set lower as p) increases. Absorption refrigerator that is composed. 2. The absorption refrigerator according to claim 1, wherein said cooling water cooler (14) is configured to adjust a cooling capacity by adjusting a rotation speed of said electric cooling fan (14b). 3. The heating amount adjusting means based on detection information of a load detecting means (S3) for detecting a load, so that the heating amount (Ip) increases as the load increases. The absorption chiller according to claim 1 or 2, wherein (L) is adjusted. 4. The regenerator (3) from the absorber (D)
A heat exchanger (N) for exchanging heat between the absorbent to be regenerated and the regenerated absorbent to be sent from the regenerator (3) to the absorber (D) to preheat the absorbent to be regenerated. An absorption refrigerator according to claim 1, 2 or 3. 5. A high-temperature regenerator (A) in which the regenerator (3) is heated by the heating means (1) and a refrigerant separated from a gas-liquid separation section (a) of the high-temperature regenerator (A). And a low-temperature regenerator (B) through which heat flows. The heat exchanger (N) is connected to the absorption liquid to be regenerated from the absorber (D) to the high-temperature regenerator (A) and the high-temperature regenerator (A). ), A high-temperature heat exchanger (8) for exchanging heat with the regenerated absorbent to be sent to the low-temperature regenerator (B) to preheat the regenerated absorbent, a regenerated absorbent and the low-temperature regenerator (B). 5. The absorption refrigerator according to claim 4, further comprising a low-temperature heat exchanger (9) for exchanging heat with the regenerated absorbent to be sent to the absorber (D) to preheat the absorbent to be regenerated.