JP3240598B2 - Absorption heat pump equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an absorption refrigerator, an absorption chiller / heater and the like which perform a required heat exchange operation by an absorption heat pump operation using an absorption liquid in which a heat absorbent is mixed with a vaporizable refrigerant. (Referred to as absorption heat pump device in the invention).

[0002]

2. Description of the Related Art As an apparatus of this type, for example, an absorption heat pump apparatus using an absorption liquid such as an aqueous solution of lithium bromide in which an absorbent is mixed with lithium bromide and water is used as the absorption heat pump is shown in FIG. Some devices are configured as the device 100.

[0003] In FIG. 6, a thick solid line part is a liquid line of the refrigerant liquid or the absorbing liquid, and a double line part is a vapor line of the refrigerant vapor. First, the circulating system of the absorbing liquid is provided at the bottom of the absorber 1. The description will be made with the accumulated low concentration absorbing solution, that is, the diluted solution 2a as a starting point.

[0004] The dilute solution 2a enters the high temperature regenerator 5 via the pipe 4 by the pump 3. Since the high-temperature regenerator 5 is heated from below by the heater 6 such as a burner, the refrigerant contained in the dilute liquid 2a evaporates and becomes a high-temperature, medium-concentration absorbent, that is, an intermediate liquid. Liquid 2b and refrigerant vapor 7a are separated.

The high-temperature intermediate liquid 2 b enters a high-temperature heat exchanger 9 via a pipe 8. In the high-temperature heat exchanger 9, the high-temperature intermediate liquid 2
b gives heat to the dilute solution 2a passing through the pipe 4 to radiate heat, and after the temperature drops, enters the low-temperature regenerator 11 via the pipe 10.

In the low-temperature regenerator 11, since the refrigerant vapor 7a is sent to the heat exchanger 11A in the low-temperature regenerator for heating the intermediate liquid 2b via the pipe line 21 and is heated, the refrigerant vapor 7a is contained in the intermediate liquid 2b. The refrigerant that has evaporated evaporates and separates into a high-concentration absorbing liquid that has become hot, that is, a concentrated liquid 2c and refrigerant vapor 7b.

The high-temperature concentrated liquid 2 c enters the low-temperature heat exchanger 13 via the pipe 12. In the low-temperature heat exchanger 13, the high-temperature concentrated liquid 2 c gives heat to the diluted liquid 2 a passing through the pipe 4, radiates heat, and after reaching a medium temperature, is formed on the tray in the absorber 1 through the pipe 14. Into the spraying device 1A, and sprays from a number of holes of the spraying device 1A.

The sprayed concentrated liquid 2c is supplied to the heat exchanger 1 in the absorber.
B is cooled by the cooling water 32a flowing therethrough. Concentrate 2
When flowing down the outside of the heat exchanger 1B in the absorber, c absorbs and dilutes the refrigerant vapor 7c entering from the adjacent evaporator 26, returns to the low-temperature diluted liquid 2a, and completes the absorption liquid. The cycle of finishing is repeated.

Next, the refrigerant circulation system will be described with the refrigerant vapor 7C entering the absorber 1 as a starting point. The refrigerant vapor 7c is
As described in the above-described absorption liquid circulation system, the concentrated liquid 2c dispersed from the spraying device 1A in the absorber 1 absorbs the diluted liquid 2c.
a into the refrigerant vapor 7a in the high temperature regenerator 5.

[0010] The refrigerant vapor 7a enters the heat exchanger 11A in the low-temperature regenerator via the pipe 21, gives heat to the intermediate liquid 2b, radiates heat, condenses into the refrigerant liquid 24a, and then forms the refrigerant liquid 24a. And enters the bottom of the condenser 25.

The condenser 23 is provided with a refrigerant vapor 7b which enters through a number of passages 11B between the adjacent low-temperature regenerators 11b.
Is cooled by the cooling water 32a passing through the heat exchanger 23A in the condenser, and the refrigerant vapor 7b is condensed into a low-temperature refrigerant liquid 24a. The refrigerant liquid 24a enters the evaporator 26 via the pipe 25, and becomes the refrigerant liquid 24b.

The pump 27 is connected to a refrigerant line 24b through a line 28.
A. Spraying device 26A formed by tray via pipe 28
And spraying from many holes of the spraying device 26A is repeated. The sprayed refrigerant liquid 24b cools the cooled water 35a passing through the evaporator internal heat exchanger 26B. During this cooling, the refrigerant liquid 24b absorbs heat from the water to be cooled 36a and evaporates to become refrigerant vapor 7c, and then passes through a number of passages 26C between the adjacent absorber 1 and the absorber liquid. Returning to 1 and repeating the circulation that one cycle of the refrigerant is completed.

Each heat exchanger 1B / 11A / 23A / 26B
Is formed, for example, by a meandering tube to obtain required cooling and heat radiation.

Further, a high-temperature intermediate liquid 2b to be put into the high-temperature heat exchanger 9 for operation switching is bypassed to the absorber 1 by a pipe 41 and an on-off valve 41A for opening and closing this bypass. The refrigerant vapor 7a to be returned to the low-temperature regenerator 11 and the refrigerant vapor 7a to be supplied to the low-temperature regenerator 11 are bypassed to the absorber 1 by the pipe 42 and the on-off valve 42A for opening and closing the bypass. System and refrigerant liquid 24b to be sprayed from spraying device 26A
The refrigerant liquid side passage which bypasses the refrigerant liquid 24b and is mixed into the absorption liquid 2a by the conduit 43 which bypasses the conduit 28 and the conduit 4 and the on-off valve 43A which opens and closes the bypass. System is provided.

The operation of each system is performed by opening and closing valves 41A, 42A, 4
3A is closed, the side paths 41, 42, and 43 are closed, and the above-described circulating systems are operated to cool the water to be cooled 36a provided from the pipe 35 in the evaporator internal heat exchanger 26B. It is supplied as cooling water 36b from a pipe 37.

A double effect cooling operation in which cooling water 32a flows from the pipe 31 to the heat exchanger 1B in the absorber and the heat exchanger 23A in the condenser, and the cooling water 36b is supplied from the evaporator 26. And on-off valves 41A, 42A, 43A
To open the bypasses 41, 42, and 43, thereby stopping the functions of the low-temperature regenerator 11 and the condenser 23, and stopping the flow of cooling water supplied from the pipeline 31.
Further, by replacing the cooled water 36a from the pipe 35 with the heated water, the heating operation can be switched to a heating operation in which high-temperature heated water is supplied from the pipe 37 instead of the cooling water 36a. It is composed.

The cooling operation, that is, the operation in which the high-temperature regenerator 5 and the low-temperature regenerator 11 perform the double regeneration operation, and the heating operation, that is, the heating operation in which only the high-temperature regenerator 5 is performed, are smoothly performed. Therefore, in switching, it is necessary to adjust the concentration of the absorbent in the absorbing solution, that is, the concentration of the absorbing solution.

The pipes 81 to 83 are parts forming an overflow pipe. The pipe 81 is formed, for example, when the absorption liquid crystallizes and enters the low-temperature heat exchanger 13, that is, when the flow rate of the concentrated liquid 2d decreases. This is for bypassing the concentrated liquid 2d from the low-temperature regenerator 11 to the absorber 1, and when this bypass operation is not performed, that is, normally, the diluted liquid sent to the pipe 4 by the pump 3 By storing the refrigerant vapor 2a in the U-shaped conduit 82 via the conduit 83, the refrigerant vapor 7b is blocked so as not to enter the absorber 1. Therefore, pipeline 8
3 is an extremely thin pipeline with respect to the pipeline 4, and the pipeline 4
Most of the diluted liquid 2a is sent to the high-temperature regenerator 5.

Further, if the absorbing liquid does not pass through the conduit between the on-off valve 41A of the conduit 41 and the absorber 1 while the on-off valve 41A is closed, the absorption in the absorbing liquid is prevented. Since the agent is crystallized and the pipe is blocked, the pipe is used to divert a small amount of the dilute solution 2a sent to the pipe 4 by the pump 3. Therefore, like the pipe 83, the pipe 84 is extremely thin with respect to the pipe 4.

As a specific configuration of the absorption heat pump device 100, a configuration as shown in FIG. 7 (hereinafter, referred to as a first prior art) is described in “Absorptive chilled / hot water” issued by the applicant of the present invention, Sanyo Electric Co., Ltd. in July 1990. Machine / absorption heat pump device C
Series catalog '90 -7 ', published in Ohmsha, February 1989, "Practical knowledge of air conditioning equipment".

In FIG. 7, portions indicated by the same reference numerals as those in FIG. 6 are portions having the same functions as those described in FIG.

Further, in the absorption heat pump apparatus 100 having the above configuration, as shown in FIG. 8, a secondary condensation function is provided to improve the heating capacity of the heating water 32b, and to increase the required pipe temperature. By controlling the open / close valve of a required pipe line and the fuel supply valve of the heater 6 based on the detection value obtained by detecting the pressure, the air pressure in each unit is maintained at 1 atm or less. Meanwhile, a configuration (hereinafter, referred to as a second prior art) capable of stably heating the heated water 32b is disclosed in Japanese Patent Application Laid-Open No. 3-79625 by the prior application of the present applicant Sanyo Electric Co., Ltd. is there.

In FIG. 8, portions denoted by the same reference numerals as those in FIG. 6 are portions having the same functions as those described in FIG. 6, and components different from those in FIG. 6 are the following. .

The pipe 61 branched from the pipe 21 guides the refrigerant vapor 7a to the auxiliary condenser 62 and the pipe 34.
Is changed to a conduit 34A, and the heated water 32b is led to a heat exchanger 62A in the auxiliary condenser 62 to be heated, and the heated water 32b is
A heating path for the cooling water 32a is additionally provided so as to supply warmer water 32c having a higher temperature than the pipe 34B.

The refrigerant vapor 7e that has led the refrigerant vapor 7a into the auxiliary condenser 62 heats the heated water cooling water 32a that has been led into the heat exchanger 62A, radiates heat, and condenses into the refrigerant liquid 24c. When the on-off valve 63A of the conduit 63 is open, it is guided to the condenser 23 and is combined with the refrigerant liquid 24a. When the on-off valve 64A of the conduit 64 is open, the high-temperature regenerator 5
To be mixed into the concentrated liquid 2b.

The heater 6 can adjust the amount of heating by a heating regulator 65. The temperature detector 66 and the temperature detector 6 are connected to the pipe 35 and the pipe 34B, respectively.
Each of the detection signals detected by providing the detection signal 7 is guided to a controller 68 via a line (not shown), and controls the adjustment of the heating regulator 65 and the opening and closing of the on-off valves 43A, 63A, and 64A. In the second prior art, the water to be cooled 36 supplied from a pipe 35
a or the water to be given in place of the heat source water is referred to as heat source water. In the case of the heating operation, the auxiliary condenser 62 is operated to be obtained from the pipe line 34 in the first prior art as described above. Since the heating water 32b is further supplied from the conduit 37A to the heating water 32b heated by the auxiliary condenser 62, the heating water 32d can be supplied at a higher temperature than in the case of the first prior art.

[0027]

In the above-described absorption heat pump device, when the concentration of the absorbing solution becomes abnormally high due to the alkaline nature of the absorbing agent, the absorbing solution is damaged, and the absorbing solution is crystallized and damaged. In general, the control according to the second prior art described above has an abnormal detection value in a required portion because of the disadvantage that the efficiency of the absorption heat pump device is reduced due to a decrease in the circulating amount of the absorbing liquid and the absorption heat pump device. In some cases, an abnormal stop function is provided to stop the operation of the apparatus completely at that time.

However, in the conventional abnormal stop function,
Even if the abnormality that is actually occurring is due to a transient phenomenon in the control process for a sudden change in supply and demand of the liquid to be heated, or even if it does not cause a serious failure immediately, If the equipment is used in a process such as food manufacturing, the maintenance process cannot be performed on the product being manufactured. There are inconveniences, such as altering things and causing enormous damage.

For this reason, there is a problem that it is desired to provide a simple device free of such inconvenience.

[0030]

According to the present invention, there is provided a circulating system for circulating a heat operation fluid such as an absorbing liquid and a refrigerant liquid via a plurality of heat exchangers including a high-temperature regenerator as described above; In addition to providing a circulation path through which the heat-operated fluid for cooling or heating is passed via a required one of the exchange devices, required control is performed based on a detection value obtained by detecting an operation state of a required portion. An absorption heat pump device that performs, based on the relationship between the temperature of the heated working fluid obtained by cooling or heating in the above-described control in a steady state, that is, the relationship between the operated temperature and the degree of heating of the high-temperature regenerator, An abnormal range setting means for setting an abnormal range of the heating degree; a temperature of the absorbent and a pressure of the refrigerant vapor in the high-temperature regenerator; and a concentration of the concentrated liquid of the absorbent in the circulation system or a response corresponding to the concentration. Value and detect Any one of the detected values obtained by the above means exceeds the predetermined reference value, that is, the excess amount detecting means for obtaining the excess amount, and the control in the steady state based on the above excess amount. Reduction control means for reducing the heating degree of the high-temperature regenerator 5 by the amount corresponding to the above excess amount, and the relationship between the heating degree reduced by the reduction and the operated temperature falls within the abnormal range. A configuration provided with an abnormality display means for performing an abnormality display when the vehicle is in the vehicle, or
Instead of the abnormality display means, the relationship between the degree of heating reduced by the heating reduction and the operated temperature is a time value obtained by measuring a time in the abnormality range,
When a predetermined time value is exceeded, a second reduction control unit that performs a second heating reduction that further reduces the heating degree by a predetermined amount, and after a predetermined time after performing the second heating reduction,
When any one of the above detection values exceeds each of the preset upper limit values above the above reference values, an abnormal stop control means for stopping the operation of the apparatus is provided. Thus, the above-mentioned problems can be solved.

[0031]

An abnormal range of the heating degree from the relationship between the temperature of the fluid to be heated and the heating degree of the high-temperature regenerator by controlling the cooling and heating in a steady state in advance, the reference value for each detected value, and the safety. Each upper limit to be set is set, and in contrast, any one of the detected values of the absorbent temperature / refrigerant vapor pressure of the high-temperature regenerator and the concentrated liquid concentration of the absorbent in the circulation system is If there is an excess amount that exceeds each preset reference value,
Since the heating degree is reduced by an amount corresponding to the excess amount, the reduced operation state is usually continued.

However, if it enters the abnormal range, the first
As a countermeasure against this, as in the first embodiment, a warning is given to the user by displaying an abnormality, and this warning allows the user to use the reasonable operation stop procedure known to him to stop the performance of the apparatus. The operation is performed so as to prevent the occurrence of excessive failure.

[0033] Also, due to such a reduction in the degree of heating,
If the state of staying within the abnormality range without exceeding the abnormality continues for more than a predetermined time, as a second measure, as in the second embodiment, the heating degree is set to the first predetermined amount. Only reduced,
A predetermined time period is checked to see if it is due to a transient control state. When the respective detection values exceed the reference value even after the lapse of the predetermined time, the heating degree is further reduced by the second predetermined amount, and similarly, the predetermined time has been measured and the transition state has passed. Later, when the value exceeds the upper limit reference value, it is determined that the abnormality is a complete abnormality that cannot be solved even by the second heating amount reduction, and the operation of the apparatus is stopped. In some cases, the heating is restored between the first heating reduction and the second heating reduction, and in the case of an abnormality or a transient that does not result in a serious failure, the capacity is reduced by these heating reductions. , So that the operation can be continued until the required time.

[0034]

An embodiment will be described below with reference to FIGS.
In these figures, portions indicated by the same reference numerals as those in FIGS. 6 to 8 are portions having the same functions as those described with reference to FIGS. 6 to 8.

[First Embodiment] First, the first embodiment will be described with reference to FIGS.
This will be described with reference to FIG. The configuration of the first embodiment is the same as that of the first embodiment.
A plurality of heat exchange devices including the high temperature regenerator 5 as described in the related art, that is, the low temperature heat exchanger 13, the high temperature heat exchanger 9, the high temperature regenerator 5, the low temperature regenerator 11, the condenser 23, and the evaporator. 26. A circulating system that circulates a heat operation fluid such as an absorbing liquid and a refrigerant liquid via the absorber 1 or the like, and a heat-receiving operation that performs cooling or heating via required heat exchange equipment. In an absorption heat pump apparatus provided with a flow path for circulating fluid and having a function of monitoring the operation state of heat exchange equipment as described in the second related art, cooling or cooling in the above-described control in a steady state is performed. Based on the temperature of the fluid to be heated obtained by heating, that is, the relationship between the temperature to be operated and the degree of heating of the high-temperature regenerator, the abnormal range of the degree of heating is set as shown in FIG. 5, for example. Abnormal range setting means and high temperature Each detection value obtained by detecting the temperature of the absorbent in the creature 5, the pressure of the refrigerant vapor, and the concentration of the concentrated liquid of the absorbent in the circulating system or a corresponding value corresponding to the concentration, that is, for example, The detection values of the temperature detector D1 and the pressure detector Dn, and the temperature detector D2 and the temperature detector D3
Excess amount detecting means for obtaining an amount by which any one of the detected values by the corresponding value corresponding to the concentration of the concentrated liquid obtained by calculating from the detected value exceeds the predetermined reference value, that is, the excess amount A reduction control means for reducing the heating degree by the control in the steady state based on the excess amount by an amount corresponding to the excess amount; a heating degree reduced by the reduction amount; This is a configuration provided with abnormality display means for performing an abnormality display when the relationship with the temperature, for example, the temperature of the cooling water 36b is within the above abnormal range.

More specifically, as shown in FIG.
, The temperature t1 of the absorbent in the high-temperature regenerator 5, for example, the temperature of the dilute solution 2 a, is detected as the “high-temperature regeneration temperature” by the temperature detector D 1, and the high-temperature regenerator is detected by the pressure detector Dn. 5, the pressure p1 of the refrigerant vapor 7a is detected.

With respect to the low temperature regenerator 11 and the condenser 23, the temperature t of the concentrated liquid 2d in the pipe 12 is detected by the temperature detector D2.
2 as “concentrated liquid temperature”, and the temperature detector D3 sets the temperature t3 of the refrigerant liquid 24a in the pipe line 25 as “refrigerant condensation temperature”.
Detected as

For the evaporator 26, the temperature t4 of the cooling water 36b in the pipe 37 is detected as "cooling outlet temperature".
Then, the data of the detected values t1 to t4 · p1 are given to a processing controller (hereinafter, referred to as a CPU) 50 by a microcomputer to perform required processing control.

Further, in this process control, data of the heating degree by the heating regulator 65 which controls the heating degree of the heater 6 of the high-temperature regenerator 5 is necessary, and the adjustment state of the heating regulator 65 is detected. The obtained heating degree h1 is given to the CPU 50.

The detection signals detected by the temperature detectors D1 to D4 and the pressure detector Dn and the detection signal of the heating regulator 65 are given to the input / output port 51 of the CPU 50 as shown in FIG. Each value obtained by A / D conversion of the values t1 to t4 · p1 · h1 (for simplicity of explanation, t1 to t4 · p1 · h1
h1) is temporarily stored in the work data memory 52 of the CPU 50. The CPU 50 performs processing according to a flow as shown in FIG. 3 based on arithmetic processing by a program stored in the processing memory 54.

In the reference data memory 53 of the CPU 50,
As shown in FIG. 5, in the control at the time of operation in a steady state, data for calculating an abnormal range AU regarded as causing an operation error or data for calculating the abnormal range AU are stored.

In FIG. 5, the heating degree h1 on the vertical axis is the degree to which the high-temperature regenerator 5 is heated by the heater 6, that is, the degree of adjustment of the heating regulator 65. In the case where a burner is used for the heater 6, , The opening of the fuel valve. The load on the horizontal axis is
For example, the temperature of the cooling water 36b, that is, the cooling water outlet temperature t4.

A range in which the relationship between the degree of heating and the degree of load operates substantially proportionally around the set value tc for the temperature t4, that is, the proportional band P is changed by 100%, and the degree of heating h1 corresponding to the change is 100%. 3 shows a relationship in the case where the heating degree control is performed with a change of 0 to 100%.

In this case, when following a control line leading to a heating degree of 50% with respect to the ideal state of the control, the range of the load degree of 50% or more, that is, the range of the cooling water 36b equal to or more than the set value tc is:
The range where the driving operation becomes abnormal, that is, the abnormal range AU
It can be regarded as.

The calculation procedure for calculating the abnormal range AU in FIG. 5 from the heating degree h1 and the cooling water 36b is stored in the processing memory 54, and the set value tc is stored in the reference data memory 53.
Is remembered.

The allowable values for the respective detection values t1 to t4 · p1 calculated from the steady state operation are set to the respective reference values ts1 to ts1.
ts2 · ps1 is stored in the reference data memory 53 from the setting input circuit 70.

The processing control flow will be described below. In FIG. 3, at step [SP1], each of the above-mentioned temperature detection values t1 to t
4 · p1 · h1 is temporarily stored in the work data memory 52.

In step [SP2], the temperature detection value t2 and the temperature value t3 are read from the work data memory 52 as data for calculating the concentration of the concentrated liquid 2d.
A corresponding value PH1A corresponding to the concentrated solution concentration PH1 is calculated by an arithmetic program for solving the following equation stored in the work memory 53, and is temporarily stored in the work data memory.

In step [SP3], the detected temperature value t1, the detected pressure value p1, and the corresponding value P are stored in the work data memory 52.
In addition to reading H1A, each of the reference values ts1 to ts4 · ps1 is read from the reference data memory 53, and a comparison operation is performed to detect the detected temperature value t1, the detected pressure value p1, and the corresponding value PH1.
A corresponds to each of the corresponding reference values ts1 to ts
The excess amount OV1 exceeding 4 · ps1 is calculated. And
When there is no excess amount OV1, the process proceeds to [SP5], and when there is the excess amount OV1, the process proceeds to [SP4].

In step [SP4], the apparatus is operated in a steady operation state, and the process returns to [SP1].

In step [SP5], the excess amount OV1
For example, assuming that 10% of FIG. 5 is a predetermined heating amount, the predetermined heating amount is multiplied by an excess amount OV1,
The operation is performed by giving an instruction to reduce the heating amount h1 to the heating regulator 65.

In step [SP5], data for calculating the abnormal range AU, for example, the abnormal range A in FIG.
As data for calculating U, the temperature detection value t4 and the heating degree h
1 is taken into the value work data memory 52 and stored.

In step [SP7], the set value tc of the cooling water temperature is read from the reference data memory 53, and the temperature value t4 and the degree of heating h1 are read from the work data memory 52. Is calculated.

In step [SP8], it is determined whether the heating degree h1 is within the abnormal range AU by performing a comparison operation. Then, if the vehicle is not in the abnormal range AU, the message [SP
9], and if it is within the abnormal range AU, [SP
Return to 1).

In step [SP9], the display device 60
The alarm indicator lamp is turned on, and the horn 62 is sounded to give a warning to alert the observer. This warning allows the user to operate with reduced capability of the device using a reasonable shutdown procedure that he knows, and to prevent excessive failure.

In the above procedure, when there is no abnormality,
The CPU 50 executes [SP1] to [SP4] or [SP
Steps [1] to [SP8] are repeated every predetermined period, for example, every 10 seconds.

[Second Embodiment] Next, a second embodiment will be described with reference to FIG.

In the configuration shown in FIG. 4, each device and each detection device are arranged and arranged in the same manner as in the first embodiment.
Instead of the abnormality display means in the embodiment, the relationship between the heating degree reduced by the heating reduction in the above [SP5] and the operated temperature enters the abnormal range AU by the determination in [SP8]. When the time value obtained by measuring the time during which the current time exceeds a predetermined time value, a second reduction control means for performing a second heating reduction for further reducing the heating degree by a predetermined amount; After a predetermined period of time after performing the heating reduction, when any of the above detection values exceeds each of the preset upper limits above the above reference values, the operation of the apparatus is stopped. And an abnormal stop control means for stopping.

More specifically, in the reference data memory 53, in addition to the data of the first embodiment, the upper limit values tu1 to t4 of the respective detection values t1 to t4 and p1 calculated from the safety limits.
u4 · pu1 are stored in the reference data memory 53 from the setting input circuit 70.

The processing control flow will be described below. In FIG. 4, up to [SP7], which is the same as that of the first embodiment, that is, the case of FIG. 3, and is different from [SP8], the processing control after [SP8] will be described.

In step [SP8], it is determined whether or not the heating degree h1 is within the abnormal range AU by performing a comparison operation. Then, if the vehicle is not in the abnormal range AU, the message [SP
9], and if it is within the abnormal range AU, [SP
Return to 1).

In step [SP9], the clock in the CPU 50 is counted, and a predetermined time, for example, about 1
Time about 0 minutes. If the reason why the heating degree h1 enters the abnormal range AU is due to a transient state, the heating degree h1 is changed to the abnormal range A with the lapse of time.
Since the detected temperature value t1, detected pressure value p1, and corresponding value PH1A may fall within each of the reference values ts1 to ts4 · ps1, the time for waiting for such a transient state to subside may be reached. It is.

Steps [SP10] and [SP11]
In [SP12], the above [SP1], [SP2] and [S
P3], and the same processing as in [SP12] is performed.
If there is no excess amount OV1, the process returns to [SP1] and the excess amount OV1 is returned.
If V1 exists, the process proceeds to [SP13].

In step [SP13], [SP5]
Similarly, the amount corresponding to the excess amount OV1, for example, 10% in FIG.
An instruction to reduce the heating amount h1 by an amount multiplied by V1 is given to the heating regulator 65 to operate.

In step [SP14], [SP9]
Similarly, the clock in the CPU 50 is counted, and a predetermined time, for example, about 10 minutes is counted. If the reason for the occurrence of the excess amount OV1 is due to a transient state, the time is measured as the detected temperature value t
1. The detected pressure value p1 and the corresponding value PH1A are equal to each reference value ts.
Since it may be within 1 to ts4 · ps1, it is time to wait for such a transient state to subside.

In steps [SP15] and [SP16], the same processing as in [SP1] and [SP2] described above is performed, and the process proceeds to [SP17].

In step [SP17], the detected temperature value t1, the detected pressure value p1, and the corresponding value PH1A are read from the work data memory 52, and the upper limit values tu1 to tu4 above the respective reference values from the reference data memory 53.・ Pu1
Is read and compared, and the excess amount OV2 in which any one of the detected temperature value t1, the detected pressure value p1, and the corresponding value PH1A exceeds each corresponding reference value tu1 to tu4 · pu1.
Is calculated. If there is no excess amount OV2, [SP
1], and if there is an excess amount OV1, the process proceeds to [SP18].

In step [SP18], the display 60
Turns on the alarm indicator lamp, sounds the horn 62, and issues a warning to alert the observer that the condition is completely abnormal, and the stop control circuit 71 controls the operation of the entire device. A command signal for stopping the operation is sent to the controlling device, and the heating controller 65 is controlled to be stopped.

In the above procedure, when there is no abnormality,
The CPU 50 executes [SP1] to [SP4] or [SP
Steps [1] to [SP8] are repeated every predetermined period, for example, every 10 seconds.

[Modification] The present invention can be carried out with the following modifications. (1) A detector capable of directly measuring the concentration of the concentrated liquid 2d by a densitometer, for example, a detector using a PH meter It is configured to detect by.

(2) In a configuration in which the operation can be switched between the cooling operation and the heating operation, a cooling operation / heating operation switching signal obtained based on a switch operation for switching or a command signal is shown in FIG. Then, by giving the reference value to the CPU 50, each reference value for each temperature difference value is switched between each reference value during the heating operation and each reference value during the cooling operation.

(3) CP controlling the operation of the apparatus
U and the CPU 50 are configured as one CPU.

[0073]

According to the present invention, as described above, the degree of heating is determined in advance from the relationship between the temperature of the working fluid to be heated and the degree of heating of the high-temperature regenerator by controlling cooling and heating in a steady state in advance. Abnormal range, reference value for each detection value, and upper limit value for safety are set. In contrast to this, the absorption liquid temperature and refrigerant vapor pressure of the high-temperature regenerator, and the concentrated liquid of the absorption liquid in the circulation system are set. If any one of the detected values with the concentration exceeds the predetermined reference value, there is an excess amount, the heating degree is reduced by an amount corresponding to the excess amount, and the reduced operation state is continued. However, if this reduction is excessive and goes into the abnormal range, as a first measure, as in the first embodiment,
An alarm is displayed to give an alarm to the user.

Therefore, the user knows that the user has entered the abnormal state by the alarm, performs the operation with reduced capacity of the apparatus by using the reasonable operation stop procedure that he knows, and does not cause excessive failure. In the meantime, those in the process can be subjected to maintenance processing.

In addition, by such a reduction in the degree of heating,
If the abnormality continues for a predetermined time or longer without being resolved, as a second measure, the heating degree is reduced by a first predetermined amount and the predetermined time is counted as in the second embodiment. If the respective detected values exceed the reference value even after the transient control state is settled, the heating degree is further reduced by the second predetermined amount, and the transitional state is settled similarly. After that, when the value exceeds the upper limit reference value, it is determined that the abnormality is completely abnormal for the first time, and the operation of the device is stopped.

Therefore, when a transient abnormality occurs in control, the system is restored between the first heating reduction and the second heating reduction. , In a state where the capacity has been reduced by reducing these heating,
While driving so as not to cause excessive failure, during this time,
Maintenance processing can be performed for those in the process.

In addition, even if an abnormality occurs at night in a process operation of a continuous process for 24 hours, there is such a feature that it is possible to drive and wait in a state of reduced capacity until a service person arrives the next morning.

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a block diagram of a main circuit according to the present invention;

FIG. 3 is a processing flowchart according to the first embodiment of the present invention;

FIG. 4 is a processing flowchart according to a second embodiment of the present invention;

FIG. 5 is a setting condition diagram of operation of a main part of the present invention.

FIG. 6 is a block diagram of a conventional technology.

FIG. 7 is a block diagram of a conventional technology.

FIG. 8 is a block diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Absorber 1A Sprayer 1B Heat exchanger in absorber 2a Rare liquid 2b Intermediate liquid 2d Concentration 3 Pump 4 Pipeline 5 High temperature regenerator 6 Heater 7a Refrigerant vapor 7b Refrigerant vapor 7c Refrigerant vapor 7e Refrigerant vapor 8 Pipeline 9 High Heat exchanger 10 Pipe 11 Low temperature regenerator 11A Heat exchanger in low temperature regenerator 11B Passage 12 Pipe 13 Low temperature heat exchanger 14 Pipe 21 Pipe 22 Pipe 23 Condenser 23A Heat exchanger in condenser 24a Refrigerant liquid 24b Refrigerant liquid 24c Refrigerant liquid 25 Pipe 26 Evaporator 26A Spraying device 26B Heat exchanger in evaporator 27 Pump 28 Pipe 31 Pipe 32a Cooling water 32b Heated water 32c Heated water 33 Pipe 34 Pipe 34A Pipe 34B Pipe Road 35 Pipe 36a Water to be cooled (heat source water) 36b Cooling water 37 Pipe 41 Pipe 41A Open / close valve 42 Pipe 42A Open / close valve 43 Pipe 43A open / close valve 50 CPU 51 input / output port 52 work data memory 53 reference data memory 54 processing memory 61 pipe 62 auxiliary condenser 62A heat exchanger 63 pipe 63A open / close valve 64 pipe 64A open / close valve 65 heating regulator 66 temperature detection Device 67 Temperature detector 68 Controller 70 Input setting circuit 71 Stop control circuit 81 Pipe 82 Pipe 83 Pipe 84 Pipe 100 Absorption heat pump device D1 Temperature detector D2 Temperature detector D3 Temperature detector D4 Temperature detector Dn Pressure Detector

──────────────────────────────────────────────────続 き Continuing on the front page (72) Hidekazu Nakajima 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture Inside Osaka Gas Co., Ltd. (72) Ryuichiro Kawakami 4-chome, Hirano-cho, Chuo-ku, Osaka-shi, Osaka No. 1-2 Inside Osaka Gas Co., Ltd. (72) Masahiro Furukawa 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Eiichi Enomoto 2-chome Keihanhondori, Moriguchi-shi, Osaka 18 Sanyo Electric Co., Ltd. (56) References JP-A-3-134442 (JP, A) JP-A-2-140563 (JP, A) JP-A-61-231360 (JP, A) JP-A-58 19669 (JP, A) JP-A-2-203167 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 15/00 306

Claims (2)

(57) [Claims] 1. A circulating system for circulating a heat operation fluid such as an absorbing liquid and a refrigerant liquid via a plurality of heat exchange devices including a high temperature regenerator, and via a required one of the heat exchange devices An absorption heat pump device that provides a circulation path for circulating a heated operation fluid that cools or heats and performs necessary control based on a detection value obtained by detecting an operation state of a required portion. Setting an abnormal range of the heating degree based on a relationship between a temperature of the heated fluid to be operated obtained by the cooling or heating in the control (referred to as an operated temperature) and a heating degree of the high-temperature regenerator. Abnormal range setting means, obtained by detecting the temperature of the absorbent and the pressure of the refrigerant vapor in the high-temperature regenerator, and detecting the concentration of the concentrated liquid of the absorbent in the circulation system or a corresponding value corresponding to the concentration. Each detection Any of the above, the excess amount detection means to obtain an amount exceeding each preset reference value (hereinafter, referred to as excess amount), based on the excess amount, the heating degree by the control in the steady state, Reduction control means for reducing by an amount corresponding to the excess amount, and abnormality display means for performing abnormality display when the relationship between the reduced heating degree and the operated temperature falls within the abnormal range. An absorption heat pump device comprising: 2. A circulating system for circulating a heat operation fluid such as an absorbing liquid and a refrigerant liquid via a plurality of heat exchange devices including a high-temperature regenerator, and via a required one of the heat exchange devices. An absorption heat pump device that provides a circulation path for circulating a heated operation fluid that cools or heats and performs necessary control based on a detection value obtained by detecting an operation state of a required portion. Setting an abnormal range of the heating degree based on a relationship between a temperature of the heated fluid to be operated obtained by the cooling or heating in the control (referred to as an operated temperature) and a heating degree of the high-temperature regenerator. Abnormal range setting means, obtained by detecting the temperature of the absorbent and the pressure of the refrigerant vapor in the high-temperature regenerator, and detecting the concentration of the concentrated liquid of the absorbent in the circulation system or a corresponding value corresponding to the concentration. Each detection Any of the above, the excess amount detection means to obtain an amount exceeding each preset reference value (hereinafter, referred to as excess amount), based on the excess amount, the heating degree by the control in the steady state, A first reduction control unit that performs a first heating reduction that reduces by an amount corresponding to the excess amount; and a relationship between the heating degree reduced by the first heating reduction and the operated temperature falls within the abnormal range. When a time value obtained by measuring the time during which the time has entered exceeds a predetermined time value, a second reduction control unit that performs a second heating reduction that further reduces the heating degree by a predetermined amount; After a predetermined time after performing the heating reduction, if any of the detected values exceeds each of the preset upper limits that are higher than the reference values, an abnormality that stops the operation of the device. And a stop control means. Heat pump equipment.