JP3187878B2 - Absorption refrigerator protection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection device for an absorption refrigerator used for cooling / heating operation and the like.

[0002]

2. Description of the Related Art An absorption refrigerator comprising a regenerator, a condenser, an evaporator, an absorber and the like connected in series with pipes has been conventionally known, and Japanese Patent Application Laid-Open No. 61-76861 discloses such an absorption refrigerator. An absorption refrigerator equipped with a non-condensable gas tank for extracting and storing non-condensable gas from a condenser or an absorber has been proposed.

[0003]

In the absorption refrigerator having the above-mentioned non-condensable gas tank, for example, when a small crack or the like is formed in the refrigerant circuit and air enters the circulation system and the internal pressure rises, the inside of the non-condensable gas tank becomes Pressure also rises. When this internal pressure has risen significantly, measures such as temporarily stopping the operation of the device and performing an inspection have been taken.Whether the pressure has risen in a normal range or the device There is a problem that it is not possible to accurately determine whether the pressure has increased due to the occurrence of an abnormality, and solving this point has been a problem. In addition, in an absorption refrigerator, for example, the amount of generation of non-condensable gas such as hydrogen gas increases, the refrigerant absorption capacity of the absorber decreases, and the temperature of the diluted liquid discharged from the absorber becomes higher than a predetermined temperature. Or
If the temperature difference between the temperature of the diluted liquid and the temperature of the cooling water expands above a predetermined temperature, or if it expands above a predetermined speed, there is a problem that crystals of the absorbing liquid are generated and the operation cannot be performed. There was a problem that it was not possible to determine whether the cause such as the rise in the temperature of the dilute solution was due to normal operation, air infiltration, or contamination of cooling water. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and comprises a non-condensable gas tank for storing non-condensable gas together with a regenerator, a condenser, an evaporator, an absorber and the like. A protection device for an absorption refrigerator configured by connecting pipes, comprising: a pressure detector installed in a non-condensing gas tank; a data processor for calculating and processing an uncondensable gas pressure detected by the pressure detector; And a display for displaying a calculation result of the processor.The data processor displays abnormality prediction information on the display when the non-condensable gas pressure detected by the pressure detector rises a plurality of times at a predetermined speed or more. A protection device for an absorption refrigerator having a function of displaying, configured by connecting a noncondensable gas tank for storing noncondensable gas together with a regenerator, a condenser, an evaporator, an absorber, and the like to a pipe. Absorption cooling A pressure detector installed in a non-condensable gas tank, a data processor for calculating the non-condensable gas pressure detected by the pressure detector, and a display for displaying the calculation result of the data processor The data processor sets a first abnormal value and a second abnormal value to the non-condensable gas pressure detected by the pressure detector, and sets the non-condensable gas pressure detected by the pressure detector to the first abnormal value. Exceeds the abnormal value, and
When the pressure rises a plurality of times at a predetermined speed or more, the display unit displays abnormality prediction information, and the
When the abnormal value is exceeded, the display unit performs an abnormal display, and a signal for reducing the combustion amount of the regenerator is issued. When the non-condensable gas pressure falls below the first abnormal value, the abnormal display of the display unit is performed. This is a protection device for the absorption refrigerator, which has a function of canceling the heat and issuing a signal for returning the combustion amount of the regenerator to its original state.The protection device is connected to the regenerator, condenser, evaporator, absorber, etc. A protection device for an absorption refrigerator configured by detecting a temperature of a dilute solution discharged from the absorber, a data processor for calculating a dilute solution temperature detected by the temperature detector, And a display for displaying the calculation result of the data processor.When the temperature of the diluted liquid detected by the temperature detector exceeds a predetermined set value or rises at a predetermined speed or more, A function to display an abnormality on the display unit A protection device for an absorption refrigerator, comprising a regenerator, a condenser, an evaporator, an absorber, and the like connected to a pipe, and discharged from the absorber. Means for detecting a temperature difference between the temperature of the diluted liquid and the temperature of the cooling water, a data processor for calculating the temperature difference detected by the temperature difference detecting means, and a display for displaying the calculation result of the data processor. Wherein the data processor has a function of displaying an abnormality on the display when the temperature difference detected by the temperature difference detecting means is increased at a predetermined speed or more. It is a protection device.

[0005]

In the protection device for an absorption refrigerator according to the first aspect, the gas pressure in the non-condensable gas tank is detected by a pressure detector, and the detected gas pressure is calculated by a data processor at a predetermined speed or higher. When it is confirmed that the temperature has risen a plurality of times, the abnormality prediction information is displayed on the display, and in the protection device for the absorption refrigerator according to the second aspect, the non-condensable gas pressure exceeds the first abnormal value and the predetermined value. An abnormality prediction information is displayed on the display when the pressure rises more than a set speed a plurality of times, and when the non-condensable gas pressure exceeds the second abnormal value, an abnormality is displayed on the display and a signal for reducing the combustion amount of the regenerator. Is issued, and when the non-condensable gas pressure falls below the first abnormal value, a signal for canceling the abnormal display and returning the combustion amount of the regenerator to the original value is issued, and the protection device for the absorption refrigerator according to claim 3 is provided. Is the data 5. A processing device calculates a dilute solution temperature detected by a temperature detector, and when the dilute solution temperature exceeds a predetermined set temperature or rises at a predetermined speed or more, an abnormal display is displayed on a display. In the protection device for the absorption refrigerator related to the above, the temperature difference between the dilute solution temperature and the cooling water temperature detected by the temperature difference detection means is calculated by the data processor, and this temperature difference is expanded at a predetermined speed or more. An error is displayed on the display.

[0006]

【Example】

(Embodiment 1) FIG. 1 shows a configuration of an absorption refrigerator and a configuration of a protection device of the present invention incorporated therein. The absorption refrigerator has a high-temperature regenerator 11, a low-temperature regenerator 12, a condenser 13,
Evaporator 14, absorber 15, high-temperature heat exchanger 16, low-temperature heat exchanger 17, refrigerant liquid tank 18, and non-condensable gas tank 1
Reference numeral 9 denotes a configuration in which pipes are connected, and the protection device according to the present embodiment has a configuration including a pressure detector 51, a data processor 52, and a display 53. Symbols P1 and P2 are pumps for circulating an absorbing liquid (for example, lithium bromide aqueous solution), and P3 is a pump for circulating a refrigerant liquid (for example, water). Further, reference numerals B1, B2, B3, B
Reference numeral 4 denotes a valve (for example, a solenoid valve) installed in each pipe. The valves B1, B2, and B3 are closed when cold water is supplied, and are opened when hot water is supplied.
Open when discharging non-condensable gas from

A non-condensable gas of a refrigerant is introduced into the non-condensable gas tank 19 from the condenser 13 and the absorber 15 through respective pipes 24 and 25. Condenser 13 and absorber 1
In this case, the method for introducing the non-condensable gas into the non-condensable gas tank 19 is as follows. A method is employed in which the liquid is sucked into the non-condensable gas tank 19 at a predetermined pressure and injected through a pipe 22 and an ejector 23 branched from the outlet of P1. Reference numeral 26 denotes a palladium cell provided in the non-condensing gas tank 19 for discharging hydrogen gas.

The pressure detector 51 is a pressure sensor for detecting the pressure of the non-condensable gas introduced into the non-condensable gas tank 19, and the data processor 52 calculates the pressure detected by the pressure detector 51. The display 53 is a device for displaying the operation result processed by the data processor 52, and is connected to each other. In addition, according to the calculation result of the data processor 52, the opening degree of the control valve 56 of the fuel supply pipe 55 connected to the gas burner 54 of the high temperature regenerator 11 is adjusted to control the combustion amount. I have.

The data processor 52 has a timekeeping function, and can calculate and calculate the pressure rise rate from the pressure of the non-condensable gas detected by the pressure detector 51. Then, the pressure increasing speed is set to a predetermined increasing speed (for example, 10
mmHg / Hr), the display 53 displays (pressure) abnormality when a pressure increase larger than this occurs a plurality of times (for example, twice).

Further, as shown in FIG. 2, a first abnormal value (for example, 50 mmHg) and a second abnormal value (for example, 100 mmHg) are provided for the pressure of the non-condensable gas detected by the pressure detector 51. , The pressure detected by the pressure detector 51 exceeds the first abnormal value, and a predetermined set speed (for example,
Pressure increase of 10 mmHg / Hr or more (for example, 2
Times), the (pressure) abnormality prediction information is displayed on the display 53. Usually, at this stage, a maintenance service company or the like is requested to maintain the equipment. Then, when the non-condensable gas pressure exceeds the second abnormal value, a (pressure) abnormality is displayed on the display 53,
A signal for reducing the opening of the control valve 56 is output, and the high-temperature regenerator 11 is output.
The combustion amount of the gas burner 54 is reduced, and the high-temperature regenerator 11
The vapor pressure of the refrigerant generated at the predetermined pressure (for example, 80 mm
Hg) Control below.

When the pressure of the non-condensable gas detected by the pressure detector 51 falls below the first abnormal value, a command is issued to cancel the abnormal display on the display 53 and return the control valve 56 to its original opening. To return the combustion amount of the gas burner 54 to the original.

During operation of the absorption refrigerator, the non-condensable gas tank 1
The hydrogen gas stored in 9 is discharged by the palladium cell 26. Further, for example, when air enters the circulating system of the refrigerant or the absorbing liquid due to a crack in the pipe section and the internal pressure rises, the pipes 24 and 25 pass through the condenser 13 and the absorber 15.
, The amount of non-condensable gas introduced through each increases, and the internal pressure of the non-condensable gas tank 19 increases.

Normally, even if the pressure of the non-condensable gas in the non-condensable gas tank 19 is temporarily increased, the discharge capacity of the palladium cell 26 is also increased. As described above, the intermittent pressure is generated when air enters the refrigerant circulation system, or when the amount of hydrogen gas generated significantly changes due to a change in the amount of combustion in the high-temperature regenerator 11 due to a change in load. Since such an increase in pressure is observed a plurality of times, it is determined that an abnormality has occurred in the apparatus, such as an increase in the amount of air entering or a decrease in the discharge capacity of the palladium cell 26, and the data processor 5
Abnormality prediction information is displayed on the display 53 based on the command from the second. As described above, the abnormality prediction information is displayed on the display 53 only when the pressure rise greater than the set speed occurs a plurality of times, for example, two or three times. There is no fear of making mistakes that determine that they have done so. Further, since the amount of combustion of the gas burner 54 is reduced and the operation is continued by increasing the pressure of the non-condensable gas tank 19, the operation can be performed without stopping the absorption refrigerator when a small amount of air leaks, that is, in the intrusion, and chilled water is continuously supplied to the load. Can be supplied.

(Embodiment 2) FIG. 3 shows an example of another protection device according to the present invention, which comprises a temperature detector 57, a data processor 52, and a display 53. Although the same absorption chiller as that shown in FIG. 1 is used, an absorption chiller that does not use the non-condensable gas tank 19 may be used. The description of the devices and configurations described in FIG. 1 is omitted.

The temperature detector 57 is a temperature sensor for detecting the temperature of the dilute solution discharged from the absorber 15 and flowing toward the high-temperature regenerator 11, and in this case, the outlet side of the pump P1 in the pipe 21. (May be provided on the inlet side of the pump P1). The data processor 52 is a device for calculating and processing the temperature of the diluted liquid detected by the temperature detector 57, and the display 53 is for displaying the calculation result of the data processor 52.

The data processor 52 in this case also has a timekeeping function, and can calculate and calculate the temperature rise rate of the dilute solution from the temperature detected by the temperature detector 57. And
The temperature of the diluted liquid is set at a predetermined temperature (for example, 45
℃) or set speed (eg 2 ℃ / H
r) When the temperature rises above, the display unit 53 displays (temperature) abnormality prediction information.

The cooling water temperature measured by a temperature detector 58 installed for measuring the water temperature on the inlet side of the absorber 15 of the cooling water pipe 31 piped through the absorber 15 and the condenser 13; The temperature detector 57 may detect a temperature difference from the dilute solution temperature detected by the temperature detector 57, calculate the temperature difference by the data processor 52, and display the result on the display 53. It is.

In the protection device having such a configuration, the temperature difference between the temperature of the diluted liquid discharged from the absorber 15 and the temperature of the cooling water at the inlet of the absorber 15 is a predetermined temperature difference (for example, , 13 ° C.) or when the rate of expansion of the temperature difference increases at or above a set rate (eg, 2 ° C./Hr), the display 53 displays (temperature) abnormality prediction information.

In an absorption refrigerator equipped with a protection device having such a function, the invasion of air, that is, a leak or a decrease in discharge capacity due to deterioration of the palladium cell 26 is notified in advance before an abnormality occurs. Appropriate measures can be taken.

Since the present invention is not limited to the above embodiment, the pressure detector 51 and the temperature detectors 57,
8 can be combined as appropriate.
Further, in the above embodiment, the case where the absorption refrigerator is used as a cooling device has been described. However, river water or the like is flown as a low-temperature heat source water through a chilled water pipe, and high-temperature water is taken out from a cooling water pipe 31 that has passed through the cooling water. It can also be used as a protection device for an absorption refrigerator for heating or hot water supply operation, which is operated by heating.

[0021]

The protection device for an absorption refrigerator according to the present invention is an absorption refrigerator having a non-condensing gas tank for storing non-condensable gas connected to a regenerator, a condenser, an evaporator, an absorber and the like by piping. A protection device, a pressure detector installed in the non-condensable gas tank, a data processor for calculating the non-condensable gas pressure detected by the pressure detector, and a display for displaying the calculation result of the data processor. Wherein the data processor has a function of displaying abnormality prediction information on the display when the non-condensable gas pressure detected by the pressure detector rises a plurality of times at a predetermined set speed or more. It is a protection device for an absorption refrigerator, and can determine an increase in pressure due to normal operation and an increase in pressure due to leakage of air or reduction in discharge capacity of non-condensable gas, and can take appropriate measures in advance. The data processor sets a first abnormal value and a second abnormal value for the non-condensable gas pressure detected by the pressure detector, and the non-condensable gas pressure detected by the pressure detector exceeds the first abnormal value. And, when the pressure rises a plurality of times at or above a predetermined set speed, the display unit displays abnormality prediction information, and when the non-condensable gas pressure exceeds a second abnormal value, the display unit performs an abnormality display. When the pressure of the non-condensable gas drops below the first abnormal value, a signal for reducing the combustion amount of the regenerator is canceled and a signal for returning the combustion amount of the regenerator to the original value is issued. Since it is an absorption refrigerator protection device with a function, it is possible to easily and accurately determine abnormal pressure of the absorption refrigerator and the like. Supply cold or hot water to the load from Can. Also,
A protection device for an absorption refrigerator configured by connecting a regenerator, a condenser, an evaporator, an absorber, and the like with a pipe, and a temperature detector for detecting a temperature of a diluted liquid discharged from the absorber, and a temperature detector for detecting the temperature. A data processor for calculating and processing the temperature of the diluted liquid detected by the temperature detector, and a display for displaying the calculation result of the data processor. The data processor has a predetermined temperature of the diluted liquid detected by the temperature detector. It is a protection device for an absorption refrigerator characterized by having a function of displaying an abnormality on the display when the set value is exceeded or the speed is increased at a predetermined set speed or more,
A protection device for an absorption refrigerator configured by connecting a regenerator, a condenser, an evaporator, an absorber, and the like to a pipe, and detects a temperature difference between a temperature of a rare liquid discharged from the absorber and a temperature of a cooling water. Means, a data processor for calculating and processing the temperature difference detected by the temperature difference detecting means, and a display for displaying the calculation result of the data processor, wherein the data processor is detected by the temperature difference detecting means. When the temperature difference increases at or above a predetermined set speed, the protection device for the absorption refrigerator has a function of displaying an abnormality on the display. In addition, the maintenance of the equipment can be performed, and this has a great effect on the maintenance management of the absorption refrigerator.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first embodiment.

FIG. 2 is an explanatory diagram illustrating a pressure rise curve in the first embodiment.

FIG. 3 is an explanatory diagram of a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 High temperature regenerator 12 Low temperature regenerator 13 Condenser 14 Evaporator 15 Absorber 16 High temperature heat exchanger 17 Low temperature heat exchanger 18 Refrigerant liquid tank 19 Non-condensing gas tank 21 Pipe 22 Pipe 23 Ejector 24 Pipe 25 Pipe 26 Palladium cell 31 cooling water pipe 51 pressure detector 52 data processor 53 indicator 54 gas burner 55 fuel supply pipe 56 control valve 57 temperature detector 58 temperature detector

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 15/00 306 F25B 43/04 F25B 49/04

Claims (4)

(57) [Claims] 1. A protection device for an absorption refrigerator comprising a non-condensable gas tank for storing a non-condensable gas and a pipe connected together with a regenerator, a condenser, an evaporator, an absorber and the like. A pressure detector, and a data processor for arithmetically processing the non-condensable gas pressure detected by the pressure detector,
And a display for displaying the calculation result of the data processor. The data processor is configured to predict the abnormality when the non-condensable gas pressure detected by the pressure detector rises a plurality of times at a predetermined speed or more. A protection device for an absorption refrigerator having a function of displaying information. 2. A protection device for an absorption refrigerator, wherein a non-condensable gas tank for storing non-condensable gas is connected to a pipe together with a regenerator, a condenser, an evaporator, an absorber and the like. A pressure detector, and a data processor for arithmetically processing the non-condensable gas pressure detected by the pressure detector,
And a display for displaying the calculation result of the data processor. The data processor sets a first abnormal value and a second abnormal value for the noncondensable gas pressure detected by the pressure detector, and detects the pressure. When the pressure of the non-condensable gas detected by the detector exceeds the first abnormal value, and when the pressure rises a plurality of times at a predetermined speed or more, the display unit displays the abnormality prediction information on the display, and the non-condensable gas pressure is changed to the second abnormal value. When the value exceeds the value, the display unit displays an abnormality, and a signal for reducing the amount of combustion of the regenerator is issued.When the non-condensable gas pressure falls below the first abnormal value, the display unit displays the abnormality. A protection device for an absorption refrigerator having a function of issuing a signal for canceling and returning a combustion amount of a regenerator. 3. A protection device for an absorption refrigerator configured by connecting a regenerator, a condenser, an evaporator, an absorber and the like with a pipe, wherein the temperature detector detects a temperature of a diluted liquid discharged from the absorber. And a data processor for calculating the temperature of the diluted liquid detected by the temperature detector, and a display for displaying the calculation result of the data processor. The data processor is a diluted liquid detected by the temperature detector. A protection device for an absorption chiller, which has a function of displaying an abnormality on the display when the temperature exceeds a predetermined set value or increases at a predetermined speed or more. 4. A protection device for an absorption refrigerator comprising piping connected to a regenerator, a condenser, an evaporator, an absorber, etc., wherein the temperature of the diluted liquid discharged from the absorber and the temperature of the cooling water are determined. The data processor includes a means for detecting a temperature difference, a data processor for calculating and processing a temperature difference detected by the temperature difference detecting means, and a display for displaying a calculation result of the data processor. When the temperature difference detected by the detecting means is increased at a predetermined speed or more, a function of displaying an abnormality on the display is provided.