JPH03194368A - Method and apparatus for controlling operation of absorption type water cooling and heating machine - Google Patents

Abstract

PURPOSE:To continue operation without generating the stop of a machine caused by trouble at the time of the pressure rise in the machine and to suppress the abnormal pressure rise in the machine by stopping the input of heat of a high temp. regenerator when the detected pressure of the high temp. regenerator becomes the set predetermined value on a high pressure side or more and performing the input of heat when the detected pressure becomes the predetermined value on a low pressure side or less. CONSTITUTION:When the pressure of a high temp. regenerator 1 rises and the detected pressure due to a pressure detector 8 reaches the preset predetermined value on a high pressure side, a burner 4 is turned OFF to stop the input of heat of the high temp. regenerator 1. When the detected pressure reaches the predetermined value on a low pressure side by the lowering of pressure after the burner 4 is turned OFF, the burner 4 is turned ON to perform the input of heat of the high temp. regenerator 1. This control is performed by a control circuit. By this constitution, an air cooling absorption type water cooling and heating machine can be continuously operated when the pressure in the machine rises by the temp. rise of cooling air without generating the trouble and stop of the machine and the abnormal pressure rise in the machine can be suppressed beforehand.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an operation control method and device for an absorption type water chiller/heater, and particularly to a method for detecting an increase in internal pressure before failure detection is activated. The present invention relates to an operation control method and apparatus for an absorption type water chiller/heater suitable for suppressing an abnormal increase in internal pressure in advance to continue efficient operation.

[Prior art] In conventional air-cooled or water-cooled absorption type water cooler/heaters,
For example, “Refrigerating and Air Conditioning Technology J VOL, 32°No. 37
7. July 1981 issue, “Absorption Refrigerator” pages 8-1
As described in 5, a pressure detector was used to detect a high pressure failure in the water cooler/heater and the equipment was stopped.

That is, as soon as the water cooler/heater stops, an alarm is issued and an indicator light indicating the point of failure lights up. In order to start operation again, it is necessary to restore the failed part to normal and manually release the failure hold, for example by pressing a restart button.

[Problems to be Solved by the Invention] The above-mentioned conventional technology considers an excessive increase in the internal pressure of the cold/hot water machine to be a malfunction. In the event of a failure and shutdown, it was not possible to restart the operation unless some kind of human intervention was taken.

However, especially in the case of air-cooled absorption type water chillers and hot water machines, even the operating pressure during rated operation is on the verge of atmospheric pressure (however, on the vacuum side), so it operates in a state very close to the conventional high pressure failure detection point. are doing. That is, even if the air temperature rises slightly, the system will go into a state of failure and stoppage, resulting in frequent failures and stoppages, which is a hassle.

The present invention was made in order to solve the problems in the prior art described above, and when the internal pressure of the machine increases due to a rise in the temperature of cooling water or cooling air, etc., one machine can continue to operate without stopping due to a failure, and the internal pressure of the machine can be increased. It is an object of the present invention to provide an operation control method and device for an absorption type water chiller/heater that can prevent an abnormal increase in water.

Another object of the present invention is to use a temperature detector instead of a pressure detector as a means for detecting the internal pressure of the machine, and to convert it into pressure. An object of the present invention is to provide a method and device for controlling the operation of a type water chiller/heater.

[Means for Solving the Problems] In order to achieve the above object, the structure of the first invention related to the operation control method of an absorption type water chiller/heater of the present invention includes an evaporator, a condenser, an absorber, and a high temperature regenerator. In a method for controlling the operation of an absorption chiller-heating machine, which consists of a refrigerant, a low-temperature regenerator, a solution pump, a refrigerant pump, a piping system that operatively connects these, and a control system that operates these, the refrigerant vapor pressure of the high-temperature regenerator is is detected by the pressure detection means, and when the detected pressure exceeds a preset high pressure side predetermined value, the heat input to the high temperature regenerator is stopped, and the detected pressure falls below a preset low pressure side predetermined value. When this occurs, heat is input to the high temperature regenerator.

Further, the configuration of the second invention related to the operation control method of an absorption type water chiller/heater of the present invention is based on the same premise as the first invention, and detects the refrigerant vapor pressure of the high temperature regenerator by a pressure detection means,
When the detected pressure exceeds a preset high-pressure side value, the refrigerant in the evaporator is forcibly fed into the absorber, and when the detected pressure falls below a preset low-pressure side value, the The refrigerant in the evaporator is forced to stop being fed to the absorber.

Furthermore, the configuration of the third invention related to the operation control method of an absorption type water chiller/heater of the present invention is based on the same premise as the first invention,
The refrigerant vapor pressure in the high-temperature regenerator is detected by a pressure detection means, and when the detected pressure exceeds a preset value on the high-pressure side, the refrigerant vapor in the heat transfer tube of the low-temperature regenerator is condensed without going through the throttling mechanism. When the detected pressure falls below a preset high pressure side predetermined value Ju, the forced bypass of the refrigerant vapor in the low temperature regenerator heat transfer tube to the condenser is stopped. This is what I did.

Furthermore, the configuration of the fourth invention related to the operation control method of an absorption type water chiller/heater of the present invention is based on the same premise as the first invention,
The refrigerant vapor pressure of the high-temperature regenerator is detected by a pressure detection means, and when the detected pressure exceeds a preset high-pressure side predetermined value, the amount of heat input to the high-temperature regenerator is reduced to a low amount, and the detected pressure When the pressure becomes lower than a predetermined value on the low pressure side, the amount of heat input to the high temperature regenerator is increased by a large amount.

In order to achieve the above object, the operation control device for an absorption type water chiller/heater according to the present invention has an evaporator, a condenser, an absorber, a high temperature regenerator, a low temperature regenerator, a solution pump, a refrigerant pump, In an operation control device for an absorption type water chiller/heater, which consists of a piping system that operatively connects these, and a control system that operates them, a means for detecting the refrigerant vapor pressure of the high temperature regenerator is installed in the collective header of the low temperature regenerator. Along with establishing.

A refrigerant pipe is provided that branches from the refrigerant pump discharge side of the refrigerant circulation system in the evaporator and connects to the absorber, and this refrigerant pipe is equipped with an electromagnetic on-off valve.

Further, other configurations of the operation control device for a collection type water chiller/heater according to the present invention include an evaporator, a condenser, an absorber, a high temperature regenerator, a low temperature regenerator, a solution pump, a refrigerant pump, and operational control of these. In an operation control device for an absorption type water chiller/heater that includes a connecting piping system and a control system that operates these, means for detecting the refrigerant vapor pressure of the high temperature regenerator is provided in the collection hesider of the low temperature regenerator, and A refrigerant vapor bypass pipe is provided to connect the refrigerant vapor bypass pipe and the condenser, and this refrigerant vapor bypass pipe is equipped with an electromagnetic on-off valve.

In particular, in order to achieve the other objects mentioned above, a more detailed configuration of the operation control device for an absorption type water chiller/heater according to the present invention is to detect the vapor pressure of the refrigerant in the high temperature regenerator as a means for detecting the vapor pressure of the refrigerant in the low temperature regenerator. A temperature detector is installed to detect the refrigerant temperature.
It is equipped with arithmetic control means for converting the temperature inspection value into refrigerant vapor pressure in the high temperature regenerator.

[Operations] The functions of each of the above technical means are summarized as follows.

According to the operation control methods according to the first and fourth inventions described above, when the pressure detector detects a preset high pressure side predetermined value, the heat input to the high temperature regenerator is stopped or the heat input amount is reduced. By lowering the temperature, the internal force of the high temperature regenerator is reduced. Here, if the pressure detector detects a predetermined value on the low pressure side, the pressure will rise again by automatically starting or increasing heat input. Although this process is repeated, there is no possibility of a failure or stoppage.

Further, according to the operation # control method according to the second invention described above,
By sending the refrigerant in the evaporator to the absorber, the solution concentration is reduced, and the pressure in the high-temperature regenerator is also reduced accordingly.

Furthermore, according to the operation control method according to the third aspect of the invention, bypassing the refrigerant vapor in the low temperature regenerator heat transfer tube to the condenser without going through the throttling mechanism means that part of the generated steam in the high temperature regenerator However, it will escape to the condenser in the form of live steam. As a result, the pressure inside the high temperature regenerator decreases.

By the way, as means for detecting the internal pressure of the high-temperature regenerator, in addition to using a pressure detector, means for detecting pressure in correlation with temperature may also be adopted as another invention.

That is, the refrigerant vapor generated in the high temperature regenerator condenses in the low temperature regenerator heat exchanger tube, and becomes a saturated refrigerant liquid at the outlet of the low temperature regenerator heat transfer tube. Therefore, instead of directly measuring the refrigerant vapor pressure, if the refrigerant liquid temperature in the saturated state is detected,
The pressure inside the high temperature regenerator can be determined from the pressure-temperature relationship in the saturated state.

[Example] Hereinafter, each example of the present invention will be described with reference to FIGS. 1 to 5.

First, an embodiment of the first invention of the operation control method for an absorption type water chiller/heater will be described with reference to FIGS. 1, 4, and 5.

FIG. 1 is a schematic configuration diagram of a high-medium pressure cycle section of an air-cooled absorption type water chiller/heater according to an embodiment of the present invention.
Liquid parts such as refrigerant liquid are indicated by diagonal lines.

4 is a time chart for the control method of each embodiment of the present invention, and FIG. 5 is a control circuit diagram for controlling the heat input of the high temperature regenerator in the apparatus of FIG. 1.

In Fig. 1, 1 is a high temperature regenerator, 2 is a low temperature regenerator, and 3 is a high temperature regenerator.
is an air-cooled condenser, 4 is a burner in the high-temperature regenerator l, 5 is an air-cooled condenser;
is a group of heat transfer tubes for refrigerant vapor distribution in the low-temperature regenerator 2,
6 is a refrigerant vapor flow path connecting the high temperature regenerator 1 and the low temperature regenerator 2; 7 is a collection header in the low temperature regenerator 2; 8 is a
A pressure detector 9 installed in the gas phase part of the collecting ladder 8 is
A refrigerant liquid pipe connecting the collecting ladder 8 and the condenser 3, 10 a throttle mechanism, 11 a refrigerant vapor flow path connecting the low temperature regenerator 2 and the condenser 3, 12 a dilute solution to the high temperature regenerator 1 13 is a pipe for flowing the concentrated solution out of the high temperature regenerator 1, 14 is a pipe for flowing the dilute solution into the low temperature regenerator 2, and 15 is a pipe for refrigerant liquid connected to the lower part of the air-cooled condenser 3. Piping 16 is a dilute solution piping connected to the lower part of the low temperature regenerator 2.

A dilute solution flows into the high-temperature regenerator 1 shown in FIG.
Refrigerant vapor generated in the high-temperature regenerator 1 and flowing out from the regenerator 3 passes through the flow path 6 and is guided into the tubes of the heat transfer tube group 5 of the low-temperature regenerator 2 .

A dilute solution flows into the low-temperature regenerator 2 from the piping 14, is spread over the heat transfer tube group 5, cools and condenses the refrigerant vapor generated by the high-temperature regenerator in the tubes, and then flows out from the plumber 6. Heat exchanger tube group 5
The refrigerant liquid condensed in the pipe collects in the collecting header 7, passes through the refrigerant liquid pipe 9 having the throttle mechanism 10, and flows into the condenser 3.

On the other hand, the refrigerant vapor generated in the low-temperature regenerator 2 passes through the flow path 11 and is also guided to the condenser 3. The refrigerant liquid from the pipe 9 and the refrigerant vapor from the flow path 11 flow down the condenser 3,
It condenses and flows out from the pipe 15.

A pressure detector 8 is provided in the gas phase portion of the gathering ladder 7, and converts and detects the refrigerant vapor pressure of the high temperature regenerator 1.

Assume that the internal pressure of an air-cooled absorption type water chiller/heater increases due to an increase in the temperature of the cooling air. The operation control method at that time is explained in the fourth section.
This will be explained with reference to the timer chart shown in the figure.

FIG. 4 shows the operating states of the devices according to the first to fourth inventions.

Lines P)l and PL shown in FIG. 4 indicate predetermined values on the high pressure side and low pressure side of the set value of the detected pressure of the pressure detector 8.

The high temperature regenerator pressure (refrigerant vapor pressure) increases, and pressure detector 8
High pressure side predetermined value P) where the detection pressure is preset by
When reaching I, the burner 4 is turned off and heat input to the high temperature regenerator 1 is stopped. After the burner 4 is turned off, when the pressure reaches a predetermined value PL on the low pressure side due to the pressure drop, the burner 4 is turned on and the high temperature regenerator 1 is turned on.
Heat input is performed.

This control is performed by a control circuit shown in FIG.

Conventionally, a starting relay 31 is connected to the operation switch 29, and the burner controller 3 is activated by a signal from the starting relay 31.
2 was activated, and the burner 33 was activated.

In this embodiment, the contact 30 of the pressure detector is connected to the operation switch 2.
Connect in series with 9. As a result, when the pressure detector detects high pressure in the high temperature regenerator, the contact 30 is opened, the starting relay 31 is turned off, and the burner 33 is stopped. In other words, it will stop according to the normal stop sequence and will not stop due to a failure. On the other hand, if the pressure detector detects low pressure and the contact 3o returns to close, the normal startup sequence will proceed.

According to this embodiment, even if the internal pressure of the air-cooled absorption chiller/heater increases due to a rise in the temperature of the cooling air, etc., the machine can continue to operate without malfunctioning or stopping. Furthermore, abnormal increases in internal pressure can be suppressed in advance.

Next, an embodiment of the second invention of the operation control method for an absorption type water chiller/heater will be described with reference to FIGS. 1, 2, and 4. Description of the control circuit will be omitted.

FIG. 2 is a schematic configuration diagram of an evaporator and absorber section of an air-cooled absorption type water chiller/heater according to another embodiment of the present invention, and in the figure, liquid sections such as solution and refrigerant liquid are indicated by diagonal lines. ing.

In FIG. 2, 17 is an evaporator, 18 and 19 are cold water pipes, 20 is a refrigerant pump installed in the refrigerant circulation system in the evaporator 17, and 21 is branched from the discharge side of the refrigerant pump 20 to an absorber. The refrigerant pipe 22 to be connected is this refrigerant pipe 2
The electromagnetic on-off valve (hereinafter simply referred to as the electromagnetic valve) provided in 1.
23 is an air-cooled absorber, 24 is a solution pump provided in the solution circulation system, and 25 is a solution piping.

As shown in FIG. 2, a refrigerant pump 20 circulates refrigerant in the evaporator 17 provided with cold water pipes 18 and 19. Refrigerant vapor generated in the evaporator 17 is guided to the air-cooled absorber 23. In the air-cooled absorber 23, the solution flows in from the pipe 25, is dispersed, decreases while absorbing refrigerant vapor, and flows out by the solution pump 24.

Here, a refrigerant pipe 21 branches from the discharge side of the refrigerant pump 20, and the refrigerant liquid is supplied to the air-cooled absorber 2 through a solenoid valve 22.
It can lead to 3. That is, when the electromagnetic valve 22 is opened, the refrigerant liquid in the evaporator 17 is forcibly sent to the air-cooled absorber 23 by the discharge pressure of the refrigerant pump 20, and the concentration of the solution becomes diluted.

When the refrigerant vapor pressure in the high temperature regenerator 1 rises and the pressure detected by the pressure detector 2 reaches a predetermined value PH on the high pressure side shown in FIG. The pressure in the regenerator 1 decreases. Pressure detector 8
When the detected pressure reaches a predetermined low-pressure value P+, the solenoid valve 22 closes, and the forced feeding of the refrigerant in the evaporator 17 to the air-cooled absorber 23 is stopped.

According to the embodiment of the second invention, the same effects as the previous embodiment of the first invention are expected.

Next, a third embodiment of the operation control method for an absorption water cooler/heater will be described with reference to FIGS. 3 and 4. Description of the control circuit will be omitted.

FIG. 3 is a schematic configuration diagram of a high-medium pressure cycle section of an air-cooled absorption type water dryer according to still another embodiment of the present invention.

In FIG. 3, parts with the same reference numerals as in FIG. 1 are the same parts as in the previous embodiment, so a description thereof will be omitted.

In FIG. 3, reference numeral 26 indicates a refrigerant vapor pipe that connects the gas phase portion of the gathering ladder 7 and the vapor phase portion of the air-cooled condenser 3, and 27 indicates an electromagnetic on-off valve (hereinafter referred to as (simply called a solenoid valve).

As shown in FIG. 3, a group of heat exchanger tubes 5 in the low temperature regenerator 2
The gas phase portion of the ladder 7 is connected to the gas phase portion of the air-cooled condenser 3 by a refrigerant vapor pipe 26 via a solenoid valve 27. Here, when the solenoid valve 27 is involved, a part of the refrigerant vapor in the tubes of the heat transfer tube group 5 is transferred to the air-cooled condenser 3 as live vapor.
bypassed.

When the refrigerant vapor pressure in the high temperature regenerator increases and the pressure detected by the pressure detector 8 reaches a predetermined value PH on the high pressure side shown in FIG. The steam is forcibly bypassed from the collecting rudder 7 to the air-cooled absorber 3 via the refrigerant vapor pipe 26. Therefore, high temperature regenerator 1
A part of the steam generated in the air-cooled condenser 3 is in the state of live steam.
As a result, the pressure inside the high temperature regenerator 1 decreases.

When the pressure detected by the pressure detector 8 reaches the low pressure side predetermined value PL, the solenoid valve 27 closes and the air-cooled condenser 3 is transferred from the ladder 7 to the collective.
Stop forced bypass of refrigerant vapor to.

According to the embodiment of the third invention, the same effects as those of the embodiment of the first invention can be expected.

Next, a fourth embodiment of the method for controlling the operation of an absorption type water chiller/heater will be described with reference to FIGS. 3 and 4.

In this embodiment, the burner 4 of the high temperature regenerator 1 uses a three-position control (high twist-low smoke-stop) burner.

When the refrigerant vapor pressure in the high-temperature regenerator 1 increases and the pressure detected by the pressure detector 8 reaches a predetermined high-pressure value PH shown in FIG. 4, the burner 4 switches from high twist to low smoke. This lowers the pressure in the high temperature regenerator 1 1.2. When the pressure detected by the pressure detector 8 reaches a predetermined low pressure value P+, the burner 4
can be switched from low smoke to high twist.

According to the embodiment of the fourth invention, the same effects as the previous embodiment of the first invention are expected.

Next, an embodiment using a temperature detector as means for detecting the internal pressure of the high temperature regenerator 1 will be described with reference to FIGS. 3 and 4.

In FIG. 3, reference numeral 28 denotes a temperature detector provided in the liquid phase portion of the ladder 7 at the bottom, which is a means to replace the pressure detector 8. That is, by using the temperature detector 28 instead of the pressure detector 8, the operation control of the first to fourth inventions described above can be performed.

The liquid phase within the collecting chamber 7 is in a saturated state. Therefore, instead of directly detecting the refrigerant vapor pressure, by detecting the saturated refrigerant liquid temperature, the refrigerant vapor pressure in the high temperature regenerator 1 can be converted from the relationship between the saturated pressure and temperature.

Therefore, as a means of detecting the internal pressure, the refrigerant liquid temperature can be detected with a temperature detector instead of a pressure detector, and this can be converted to the refrigerant vapor pressure.5 The detector can be relatively inexpensive. can do.

Furthermore, according to each of the embodiments described above, abnormal increases in pressure, temperature, and solution concentration of the air-cooled absorption type water chiller/heater can be suppressed in advance.

In addition, although each of the above-mentioned embodiments explained an example of an air-cooled absorption type water chiller/heater, it goes without saying that the present invention can also be applied to a water-cooled absorption type chiller/heater.

[Effects of the Invention] As described above in detail, according to the present invention, when the pressure inside the machine increases due to a rise in the temperature of cooling water or cooling air, the machine continues to operate without stopping due to a failure, and the inside of the machine It is possible to provide an operation control method and device for an absorption type water chiller/heater that can prevent an abnormal increase in pressure in advance.

In addition, as a means of detecting the internal pressure, a temperature detector can be used instead of a pressure detector to detect temperature, and it can be converted to pressure, so the method for controlling the operation of an absorption type water chiller/heater reduces the cost of the detection means. and the equipment thereof.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a high-medium pressure cycle section of an air-cooled absorption type water chiller/heater according to an embodiment of the present invention, and FIG. FIG. 3 is a schematic diagram of the high-medium pressure cycle section of an air-cooled absorption type water chiller/heater according to yet another embodiment of the present invention, and FIG. FIG. 5, which is a time chart for the control method of each embodiment of the present invention, is a control circuit diagram for controlling the heat input of the high temperature regenerator in the apparatus of FIG. 1. 1... High temperature regenerator, 2... Low temperature regenerator, 3... Air-cooled condenser, 4... Burner, 5... Heat exchanger tube group, 6...
Flow path, 7... Collection header, 8... Pressure detector, 9.
...Refrigerant liquid piping, 10... Throttle mechanism, 17... Evaporator, 20... Refrigerant pump, 21... Refrigerant pipe, 22
... Solenoid valve, 23.. Air-cooled absorber, 24.. Solution pump, 26.. Refrigerant vapor pipe, 27.. Solenoid valve, 28.
...Temperature detector.

Claims (1)

[Claims] 1. From an evaporator, a condenser, an absorber, a high-temperature regenerator, a low-temperature regenerator, a solution pump, a refrigerant pump, a piping system that operatively connects these, and a control system that operates them. In the operation control method of an absorption type water chiller/heater, the refrigerant vapor pressure of the high temperature regenerator is detected by a pressure detection means, and when the detected pressure exceeds a predetermined value on the high pressure side set in advance, the refrigerant vapor pressure of the high temperature regenerator is detected. An operation control method for an absorption type water chiller/heater, characterized in that heat input is stopped, and when the detected pressure falls below a predetermined value on the low pressure side, heat is input to the high temperature regenerator. 2. An absorption type water chiller/heater consisting of an evaporator, condenser, absorber, high temperature regenerator, low temperature regenerator, solution pump, refrigerant pump, a piping system that operatively connects these, and a control system that operates them. In the operation control method, the refrigerant vapor pressure of the high-temperature regenerator is detected by a pressure detection means, and when the detected pressure exceeds a preset value on the high pressure side, the refrigerant in the evaporator is forced into the absorber. Operation of an absorption type water chiller/heater, characterized in that when the detected pressure becomes equal to or less than a predetermined value on the low pressure side, the forcible feeding of the refrigerant in the evaporator to the absorber is stopped. Control method. 3. An absorption type water chiller/heater consisting of an evaporator, condenser, absorber, high temperature regenerator, low temperature regenerator, solution pump, refrigerant pump, piping system that operatively connects these, and a control system that operates them. In the operation control method, the refrigerant vapor pressure of the high-temperature regenerator is detected by a pressure detection means, and when the detected pressure exceeds a preset high-pressure side predetermined value, the refrigerant vapor in the heat transfer tube of the low-pressure regenerator is throttled. When the detected pressure falls below a predetermined value on the high pressure side by forcibly bypassing the condenser without going through a mechanism, the refrigerant vapor in the low temperature regenerator heat transfer tube is
A method for controlling the operation of an absorption type water chiller/heater, characterized by stopping forced bypass to a condenser. 4. Absorption chiller/heater consisting of an evaporator, condenser, absorber, high-temperature regenerator, low-temperature regenerator, solution pump, refrigerant pump, a piping system that operatively connects these, and a control system that operates them. In the operation control method, the refrigerant vapor pressure of the high-temperature regenerator is detected by a pressure detection means, and when the detected pressure exceeds a predetermined value on the high pressure side, the amount of heat input to the high-temperature regenerator is reduced. An operation control method for an absorption type water chiller/heater, comprising: increasing the amount of heat input to the high temperature regenerator to a large extent when the detected pressure falls below a predetermined value on the low pressure side. 5. Absorption type water chiller/heater consisting of an evaporator, condenser, absorber, high temperature regenerator, low temperature regenerator, solution pump, refrigerant pump, piping system that operatively connects these, and a control system that operates them. In the operation control device, a means for detecting the refrigerant vapor pressure of the high-temperature regenerator is provided in the collection header of the low-temperature regenerator, and a means for detecting the refrigerant vapor pressure of the high-temperature regenerator is provided, and the refrigerant is connected to the absorber by branching from the refrigerant pump discharge side of the refrigerant circulation system in the evaporator. An operation control device for an absorption type water chiller/heater, characterized in that a pipe is provided, and the refrigerant pipe is equipped with an electromagnetic on-off valve. 6. Absorption type water chiller/heater consisting of an evaporator, condenser, absorber, high temperature regenerator, low temperature regenerator, solution pump, refrigerant pump, piping system that operatively connects these, and a control system that operates them. In the operation control device, a means for detecting the refrigerant vapor pressure of the high temperature regenerator is provided in the collection header of the low temperature regenerator, and a refrigerant vapor bypass pipe is provided to connect the collection header and the condenser, and the refrigerant vapor bypass pipe is provided to connect the collection header and the condenser. An operation control device for an absorption type water chiller/heater, characterized in that a pipe is equipped with an electromagnetic on/off valve. 7. Any one of claims 5 or 6, wherein the means for detecting the refrigerant vapor pressure of the high-temperature regenerator is a pressure detector provided in a collection header connected to the refrigerant vapor heat transfer tube in the low-temperature regenerator. Operation control device for absorption type water chiller/heater. 8. As a means for detecting the refrigerant vapor pressure in the high-temperature regenerator, a temperature detector is provided to detect the condensed refrigerant temperature in the low-temperature regenerator, and an arithmetic control means is provided to convert the detected temperature value into the refrigerant vapor pressure in the high-temperature regenerator. 7. The operation control device for an absorption type water chiller/heater according to claim 5, further comprising: