JP3748966B2 - Absorption refrigeration system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorption refrigerator / absorption chiller / heater configured to cool and heat a target heat-treated fluid by performing a required heat exchange operation using an absorbent mixed with a heat absorbent. The present invention relates to an absorption refrigeration apparatus (referred to as an absorption refrigeration apparatus in the present invention), and particularly to an absorption refrigeration apparatus with improved heating control of an absorbing liquid.
[0002]
[Prior art]
As this type of apparatus, for example, an absorption refrigeration apparatus using an absorption liquid such as a lithium bromide aqueous solution in which an absorbent is mixed with lithium bromide and a refrigerant is mixed with water is well known. 100 configurations (hereinafter referred to as first prior art) are disclosed in Japanese Patent Laid-Open No. 6-88654 based on an application by the applicant of the present application.
[0003]
In FIG. 3, the thick solid line portion is a liquid conduit for refrigerant liquid, absorption liquid, cooling water, etc., the double line portion is a vapor conduit for refrigerant vapor, and the cold / hot water 36b was cooled during the cooling operation. It becomes cold water and becomes heated water during the heating operation.
[0004]
First, the absorption liquid circulation system will be described starting from the low concentration absorption liquid accumulated at the bottom of the absorber 1, that is, the dilute liquid 2a. The dilute liquid 2a enters the high temperature regenerator 5 through the pipe line 4 by the pump P1. 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-concentration absorbing liquid, that is, an intermediate It separates into liquid 2b and refrigerant vapor 7a.
[0005]
The high-temperature intermediate liquid 2 b enters the high-temperature side heat exchanger, that is, the high-temperature heat exchanger 9 through the pipe line 8. In the high-temperature heat exchanger 9, the high-temperature intermediate liquid 2 b gives heat to the dilute liquid 2 a passing through the pipe line 4 to dissipate it. After the temperature drops, it enters the low-temperature regenerator 11 through the pipe line 10.
[0006]
In the low temperature regenerator 11, since the refrigerant vapor 7a sent to the heat radiating pipe 11 through the pipe line 21 heats the heat radiating pipe 11, the refrigerant contained in the intermediate liquid 2b is evaporated by this heating. Then, it is separated into a high-concentration absorbing liquid that has reached a high temperature, that is, concentrated liquid 2c and refrigerant vapor 7b.
[0007]
The hot concentrated liquid 2 c enters the low-temperature side heat exchanger, that is, the low-temperature heat exchanger 13 through the pipe 12. In the low-temperature heat exchanger 13, the hot concentrated liquid 2 c gives heat to the dilute liquid 2 a passing through the pipe line 4, dissipates it, reaches a medium temperature, passes through the pipe line 14, and then spreader 1 </ b> A in the absorber 1. And spray from a number of holes in the spreader 1A.
[0008]
The sprayed concentrated liquid 2c is cooled by cooling water 32a flowing through the cooling pipe 1B in the absorber 1. When the concentrated liquid 2c flows down the outside of the cooling pipe 1B, it absorbs the refrigerant vapor 7c entering from the adjacent evaporator 26 and dilutes, returns to the low-temperature diluted liquid 2a, and completes the cycle of the absorbing liquid. The absorption liquid circulation is repeated.
[0009]
Next, the refrigerant circulation system will be described starting from the refrigerant vapor 7 </ b> C that has entered the absorber 1. The refrigerant vapor 7c is absorbed by the concentrated liquid 2c dispersed from the spreader 1A in the absorber 1 and enters the dilute liquid 2a as described in the above-described absorption liquid circulation system. It becomes the refrigerant | coolant vapor | steam 7a.
[0010]
The refrigerant vapor 7a enters the heat radiating pipe 11A of the low-temperature regenerator 11 through the pipe line 21, gives heat to the intermediate liquid 2b, dissipates it, condenses into the refrigerant liquid 24a, passes through the pipe line 22, Enter the bottom of the condenser 23.
[0011]
The condenser 23 cools the refrigerant vapor 7b entering through a large number of passages 11B between the adjacent low-temperature regenerators 11 with cooling water 32a passing through the cooling pipe 23A in the condenser 23, The vapor 7b is condensed into a low-temperature refrigerant liquid 24a. The low-temperature refrigerant liquid 24 a enters the evaporator 26 through the pipe 25 and accumulates in the lower part of the evaporator 26 to become the refrigerant liquid 24 b.
[0012]
The pump P2 repeatedly sends the low-temperature refrigerant liquid 24b to the spreader 26A via the pipe line 28 and sprays it from many holes of the spreader 26A. The sprayed refrigerant liquid 24b cools the heat-treated fluid that passes through the heat exchange pipe 26B in the evaporator 26, that is, the cold / hot water return water 36a. During this cooling, the refrigerant liquid 24b absorbs heat from the cold / hot water return water 36a and evaporates into the refrigerant vapor 7c, and then absorbs through a number of passages 26C between the adjacent absorbers 1. Returning to the vessel 1, the refrigerant circulation in which the circulation of the refrigerant is completed is repeated.
[0013]
As described above, by the double regeneration operation of the high temperature regenerator 5 and the low temperature regenerator 11, the heat exchange pipe 26B in the evaporator 26, that is, the heat, is circulated while circulating the absorption liquid and the refrigerant, that is, the heat operation fluid. The heated operation fluid supplied from the pipe line 35, that is, the cold / hot water return water 35a is cooled by the replacement pipe, and the cold water 35b is cooled from the pipe line 37 to a cooling target device (not shown) such as an indoor cooling device. The operation given as the heat-treated operating fluid is called a double-effect cooling operation, which is mainly used for cooling and is also called a cooling operation.
[0014]
On the other hand, the refrigerant vapor 7a evaporated in the high-temperature regenerator 5 and the high-temperature intermediate liquid 2b to be put in the high-temperature heat exchanger 9 are provided in the pipeline 41 and the pipeline 42 which are bypassed and fed to the evaporator 26. The on-off valve V1 and the on-off valve V2 are opened and returned directly to the absorber 1, and the refrigerant liquid 24b to be sprayed from the spreader 26A is bypassed between the bottom of the evaporator 26 and the pipe line 4. The on-off valve V2 provided in the pipe line 43 is opened so that the refrigerant liquid 24b is mixed into the absorption liquid 2a, and the operation of only the high-temperature regenerator 5 without using the low-temperature regenerator 11 allows the absorption liquid circulation and refrigerant circulation. The heated operation fluid, that is, the cold / hot water return water 36a supplied from the pipe line 35 is heated by the heat exchange pipe 26B, that is, the heat exchange pipe in the evaporator 26, and hot water is supplied from the pipe 37. 36b is a heating target device (not shown) such as an indoor heating device. In the operation given as warming the heat operation fluid, say warming operation (boiler operation), mainly due to the use for heating, and also said heating operation. Further, during this cooling operation, the cooling of the absorber 1 and the condenser 23 is unnecessary, and therefore the water supply of the cooling water 32a from the pipe line 31 is stopped.
[0015]
Further, the pipe line 81 is a part that forms an overflow pipe, and is, for example, stored at the bottom of the low-temperature regenerator 11 excessively during the dilution operation of the absorbing liquid or during the heating operation, that is, during the heating operation. In the cooling operation, that is, in the cooling operation, by storing the absorption liquid in the U-shaped sagging portion 82, the side liquid is returned to the absorber 1 through the pipe 81. The refrigerant vapor 7 b is blocked from entering the absorber 1.
[0016]
It should be noted that the increase in the amount of the refrigerant liquid 24b that accumulates at the bottom of the evaporator 26 during the heating operation or the like passes through the partition wall between the bottom of the evaporator 26 and the bottom of the absorber 1 so as to join the diluted liquid 2a. Furthermore, during the heating operation, the temperature of the evaporator 26 increases the temperature of the refrigerant liquid 24b accumulated in the pipe 28 / spreader 26A. Since the inside of the spreader 26A is clogged, in order to prevent this, the pipe line 28B and the on-off valve V4 are provided to discharge the refrigerant liquid 24b in the pipe line 28 and the spreader 26A.
[0017]
As shown in FIG. 5, the control unit 70 is a microcomputer-type control processing function, that is, a control unit mainly composed of the CPU 70A, for example, a control unit composed of a commercially available CPU board (CPU / B). The operation signals from the unit 76 and the detection signals from the temperature detectors S1 to S4 are taken from the input / output port 71, temporarily stored in the work memory 73, and stored in the work memory 73. Calculation based on data, a program of the control processing flow stored in the processing memory 72, reference value data such as a predetermined temperature stored in the data memory 74, time value data such as waiting time measured by the time measuring circuit 75, etc. Based on the processing, control signals for the pumps P1 and P2, the on-off valves V1 to V4, the heating adjustment valve V5, the main on-off valve V6, etc. obtained by performing the required control processing And outputs from the output port 71, which is constituted to display given on the display unit 77 the required ones from the contents of the storage data stored in the working memory 73. The processing memory 72 and the data memory 74 may be stored in one PROM, EPROM, EEPROM, flash memory, or the like.
[0018]
And, by controlling the opening / closing of the on-off valves V1, V2, V4 and the operation / stopping of the pumps P1, P2, the control unit 80 switches between the cooling operation and the heating operation as necessary. During each operation, in order to maintain the cold / hot water 36b to be given to the cooling target device or the warming target device at a predetermined temperature, required operation signals given from the operation unit 76, the cold / hot water return water 36a, / Heat detector 35 based on the detection signals given from temperature detectors S1 and S2 for detecting the temperature of hot water 35b, temperature detectors S3 and S4 for detecting the temperature of cooling water 32a and cooling water return water 32b, etc. 6 is configured to perform a steady temperature control operation by controlling an igniter 66 that performs ignition of 6, a heating adjustment valve V5 that adjusts a heating amount, an original opening / closing stool valve V6, and the like. Equipment Minutes are composed of those of the electric type.
[0019]
When the configuration of FIG. 3 is shown in a specific configuration, it is as shown in FIG. 4, and the heating amount and ignition / extinguishing control system for the heater 6 are mainly as shown in FIG. The controller 70 controls the temperature of the cold / hot water 36b, that is, based on the detection signal of the temperature detector S2. In the cooling operation, when the cold / hot water 36b becomes lower than the target temperature, the fuel / flow rate adjusting valve V5A is set to the minimum opening degree, and further, the original on-off valve V6 is closed to extinguish the fire. That is, the operation is performed so as to stop the heating, but in the case of the heating operation, the same operation is performed when the temperature of the cold / hot water 36b becomes higher than the target temperature.
[0020]
In FIG. 6, a heating adjustment valve V6 includes a fuel 65A supplied to the heater 6, for example, a fuel / flow rate adjustment valve V5A that adjusts the supply amount of city gas or oil, and air mixed with the fuel 65A, that is, a feed. The air supply adjustment valve V5B that adjusts the supply amount of air from the air device 65B is configured to be interlocked and driven by the electric motor V5C. The supply of the fuel 65A to the heater 6 is the original opening / closing driven by the electric motor V6A. After the opening / closing control by the valve V6, the supply amount of the fuel 65A is adjusted by the fuel / flow rate adjusting valve V5A.
[0021]
The igniter 66 is configured to generate an electric spark by applying a high voltage generated by a high voltage generation circuit (not shown) to the discharge electrode 66A, and to ignite the supplied fuel 65A. The insufflator 65B is constituted by a blower type blower driven by an electric motor 65B1.
[0022]
The igniter 66, the electric motor V5C, the electric motor V6A, and the electric motor 65B1 are driven for a required time by giving a control signal from the control unit 70 to the relay circuits 67A, 67B, 67C, and 67D for applying a voltage from the power source 68, respectively. Among these, the relay circuits 67B and 67C for the electric motor V5C and the electric motor V6A are automatic return type overload relays and perform switching connection for switching the electric motor V5C and the electric motor V6A between the normal rotation direction and the reverse rotation direction. The relay circuits 67B and 67C are overloaded to shut off the power supply 68 when the fuel / flow rate adjusting valve V5A and the original opening / closing valve V6 are driven exceeding the opening / closing limit, respectively. .
[0023]
In the case of the large absorption refrigeration apparatus 100, the flow rate adjustment valve V5 opens to an opening degree of 100% as shown in [Valve Open / Close Control Characteristics] in FIG. Opening W, for example, configured so as to be closed up to a point where the opening of about 3% is left as a limit, and the original on-off valve V6 is configured to be simply fully opened / closed, so that it is not during fire extinguishing after ignition. In such a case, the ignition remains so that the complete opening / closing valve V6 is closed when the fire is completely extinguished, that is, when the heating is stopped.
[0024]
Further, the opening degree of the fuel / flow rate adjusting valve V5A is controlled by an appropriate driving time proportional to the difference between the target temperature and the temperature detected by the temperature detector S2, that is, the temperature of the cold / hot water 36b, for example, The relay circuit 67B is closed for about 1/10 of the opening / closing drive time T1, and the motor V5C is driven in the required rotational direction.
[0025]
Therefore, when extinguishing the fire, that is, when stopping the heating, after supplying the electric power to the electric motor V5C in the direction to close the fuel / flow rate adjusting valve V5A for a little longer than the full opening / closing drive time T1, Power is supplied to the electric motor V6A so as to close the original opening / closing valve V6.
[0026]
The absorption refrigeration apparatus can be switched between a cooling operation and a heating operation, as in the absorption refrigeration apparatus 100 described above, and only a cooling operation without providing a portion related to the heating operation. Although there are things that can be performed, in the present invention, both are referred to as an absorption refrigeration apparatus.
[0027]
[Problems to be solved by the invention]
In the configuration of the above prior art, when extinguishing the fire, the motor V5C is operated in a direction to close the fuel / flow rate adjusting valve V5 for a time slightly longer than the full opening / closing drive time T1, and then the original opening / closing valve V6 is operated. Since the electric motor V6A is operated in the closing direction, when the fire is extinguished when the opening of the fuel / flow rate adjusting valve V5A is small, the fuel / flow rate adjusting valve V5 actually reaches the remaining opening W. However, since the fire cannot be extinguished without waiting for the full opening / closing drive time T1, there are inconveniences that the control of the temperature of the cold / hot water 367b is delayed by the amount of the waiting time and the fuel is wasted.
[0028]
  In order to eliminate such inconvenience, an opening degree detector for obtaining opening degree information is provided in the fuel / flow rate adjusting valve V5A itself, and the original opening / closing valve V6 is controlled by the opening degree information. Although it is conceivable, it is possible to provide such a configuration due to the structure of the fuel / flow rate regulating valve V5A.There are cases where it is not possible.
  In addition, a method in which the electric motor V5C is changed to a pulse motor or a step motor is also conceivable. However, in the case of a large apparatus, the fuel / flow rate adjusting valve V5 is also large, so that it is driven by a pulse motor or a step motor. With this configuration, the motor itself is expensive, and in the case of a pulse motor or step motor, it is difficult to obtain a large driving force. Therefore, it is necessary to provide a reduction mechanism with a large reduction ratio in the drive mechanism. Due to the speed reduction ratio, the drive speed of the fuel / flow rate adjusting valve V5 becomes too slow, resulting in inconveniences such as failure to control. In the present invention, the electric motor means a simple induction motor or an induction motor with a speed reduction mechanism.
  For this reason, there is a problem that it is desired to provide an absorption refrigeration apparatus that solves the above disadvantages with a simple configuration regardless of such a structure.
[0029]
[Means for Solving the Problems]
This invention cools or heats the heat-treated fluid based on the heat-treated fluid heated by the high-temperature regenerator as described above, and adjusts the supply of fuel used for the heating by providing the remaining opening. In an absorption refrigeration system having a configuration controlled by a flow rate adjusting valve and a main opening / closing valve that fully opens and closes,
[0030]
  Provide a unit drive time that subdivides the drive time required to drive the flow rate adjustment valve from the remaining opening to the full opening or from the full opening to the remaining opening by the electric motor that drives the flow rate adjustment valve. A unit time drive control means for driving the electric motor, and a count value obtained by counting the number of times of driving by the unit drive time.When the data memory and the original on-off valve are fully closed, confirm that the count value stored in the data memory is zero,The above-described problem is solved by providing a heating stop means for stopping the heating by driving the electric motor of the original on-off valve to fully close the original on-off valve.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
As an embodiment of the present invention, an example in which the present invention is applied to an absorption refrigeration apparatus 100 having the configuration shown in FIGS. 3 to 6 will be described.
[0032]
【Example】
Hereinafter, an embodiment will be described with reference to FIGS. In these drawings, the parts denoted by the same reference numerals as those in FIGS. 3 to 6 are parts having the same functions as the parts having the same reference numerals described with reference to FIGS. 3 to 6, and FIGS. The parts denoted by the same reference numerals are parts having the same functions as the parts denoted by the same reference numerals described in either FIG. 1 or FIG.
[0033]
In the configuration of FIG. 1, the difference from the configurations of FIGS. 3 to 6 is that, firstly, the control of the fuel / flow rate adjusting valve V5A is performed as shown in [valve opening / closing control characteristics] of FIG. The time required to drive the electric motor V5C of the fuel / flow rate adjusting valve V5A, which is required from the degree W to fully open, that is, to open to 100% of the opening or to close to the remaining opening W, is defined as the full opening / closing drive time T1. A unit drive time T2 obtained by subdividing the total open / close drive time T1 is set, the unit drive time T2 is set to “1”, and the number of times driven by the unit drive time T2 is counted as the drive number N. It is.
[0034]
In other words, when the full opening / closing drive time T1 is determined as the time required to fully open from the remaining opening W, that is, to open up to 100%, the maximum number of driving times Nmax required from the remaining opening W to full opening is The opening / closing driving time T is divided by the unit driving time T2, and the remaining opening W is the number of times of driving N = 0. When N = 0, the original opening / closing valve V6 is fully closed to extinguish the fire. This makes it possible to determine that the heating may be stopped.
[0035]
Secondly, in order to control the fuel / flow rate adjusting valve V5A and the original on-off valve V6 based on the value of the number of times of driving N by the unit driving time T2, the control processing flow program of FIG. In the processing memory 72, the data of the maximum number of driving times Nmax are stored in advance in the data memory 74, respectively.
[0036]
[Explanation of control processing flow]
The control processing flow in FIG. 2 is configured as a subroutine attached to a main control processing routine for controlling the steady operation of the apparatus. The main control processing is performed every predetermined time, for example, every 0.5 seconds. It is organized so as to shift from the routine to the control processing flow of FIG.
[0037]
  Note that a command indicating that the heating of the heater 6 needs to be increased, decreased, or stopped based on the temperature data obtained from the detection signal obtained by detecting the temperature of the cold / hot water 36b with the temperature detector S2.Processing to performIs configured to perform processing on the main control processing routine side.
[0038]
In step SP1, the command data executed by the main control processing routine is fetched and the process proceeds to the next step SP2.
In Step SP2, it is determined whether or not the command data is a command to “start heating”, that is, a command to start heating of the heater 6. When it is “start heating”, the process proceeds to the next step SP3, and when not, the process proceeds to step SP11.
[0039]
  In step SP3, the main on-off valve V6 is fully opened and ignited by the igniter 66, and then the routine proceeds to a predetermined step location in the main control processing routine. Here, full opening and ignition of the original on-off valve V6 are performed from the control unit 70 to the relay circuit 67 of FIG.CIs applied to the motor V6A, and the control signal is applied to the relay circuit 57A to operate the igniter 66. Note that ignition and heating can be started only by opening the main opening / closing valve V6 because the fuel 65A that has passed through the original opening / closing valve V6 passes through the portion of the remaining opening W of the fuel / flow rate adjustment valve V5A to the heater 6 side. Since the air supply adjustment valve V5B is opened in conjunction with the fuel / flow rate adjustment valve V5A as it flows outInsufflator 66This is because the air supplied from is mixed with the fuel 65A and sent into the heater 6.
[0040]
In step SP11, it is determined whether or not the command data is a command to “increase heating”, that is, a command to increase the heating amount of the heater 6. When it is “heating increase”, the process proceeds to the next step SP12, and when not, the process proceeds to step SP21.
[0041]
In step SP12, it is determined whether or not the driving number N is “maximum driving number Nmax”. When “the maximum number of times of driving Nmax” is reached, the routine proceeds to a predetermined step position of the main control processing routine. Otherwise, the routine proceeds to the next step SP13. In this determination, the driving number N is stored in a predetermined storage location of the work memory 73, the data obtained by reading the driving number N, and the data obtained by reading the maximum driving number Nmax stored in the data memory 74. Are determined by comparison calculation.
[0042]
  In step SP13, the electric motor V5C of the fuel / flow rate adjusting valve V5A is driven in the opening direction for the unit drive time T2, and the process proceeds to the next step SP14. The driving here is performed from the control unit 70 to the relay circuit 67B of FIG.Time T2Only by giving a control signal to the electric motor V5C in such a direction as to open the fuel / flow rate adjusting valve V5A, the fuel / flow rate adjusting valve V5A is opened by an amount corresponding to the unit drive time T2.
[0043]
  In step SP14, “1” is added to the drive circuit N stored in the work memory 73, and then the routine proceeds to a predetermined step location of the main control processing routine.
  ◆ In step SP21, the command data indicates “heating reduction”, that is, the heating amount of the heater 6 is set.ReductionIt is determined whether or not it is a command to do so. When it is “heat reduction”, the process proceeds to the next step SP22, and when not, the process proceeds to step SP31.
[0044]
  In step SP22, the electric motor V5C of the fuel / flow rate adjusting valve V5A is driven in the closing direction for the unit drive time T2, and the process proceeds to the next step SP23. The driving here is performed from the control unit 70 to the relay circuit 67B of FIG.Time T2Only by giving a control signal to the motor V5C in such a direction as to close the fuel / flow rate adjusting valve V5A, the fuel / flow rate adjusting valve V5A is closed by an amount corresponding to the unit drive time T2.
[0045]
In step SP23, “1” is subtracted from the drive count N stored in the work memory 73, and then the routine proceeds to a predetermined step in the main control processing routine.
In step SP31, it is determined whether or not the command data is a command to “stop heating”, that is, a command to stop heating the heater 6 and extinguish it. If it is “heat stop”, the process proceeds to the next step SP32, and if not, the command data is not related to the heating of the heater 6, so the process proceeds to a predetermined step in the main control processing routine.
[0046]
In step SP32, it is determined whether or not the number of times of driving N is N = 0, that is, the fuel / flow rate adjusting valve V5A corresponds to the remaining opening degree W. If N = 0, the process proceeds to step SP41, and if not, the process proceeds to the next step SP33. In this determination, it is determined whether or not the value obtained by reading the data of the driving frequency N stored in the work memory 73 is “0”. When N = 0, the air supply adjustment valve V5B is also in a state of stopping air supply, and the control signal is supplied from the control unit 70 to the relay circuit 67D to cut off the voltage applied to the electric motor 65B1. As a result, air supply is stopped.
[0047]
In step SP33, after performing the same control as in step SP22, the process returns to step SP32 and continues to be repeated until N = 0 in step SP32.
[0048]
  In step SP41, the flow of the fuel 65A is shut off and digested by fully closing the main opening / closing valve V6, and then the routine proceeds to a predetermined step location of the main control processing routine. Here, the full closing of the original on-off valve V6 is performed by the relay circuit of FIG.67CIs supplied to the electric motor V6A so as to block the outflow of the fuel 65A.
[0049]
In the above description of the control processing flow, only the original opening / closing valve V6 is opened in steps SP3 and SP4. However, depending on the configuration of the apparatus, in step SP3, the fuel / flow rate adjusting valve V5A is fully opened. In this case, as shown in parentheses in steps SP3 and SP4, in step SP3, the motor V5C of the fuel / flow rate adjusting valve V5A is turned on the maximum number Nmax of unit drive time T2. In step SP4, it is only necessary to change the storage of the driving frequency N of the work memory 73 to the value of Nmax, and the other steps may be performed in the same manner as the above-described control processing. become.
Further, the predetermined value of the count value at the position of the remaining opening W is not set to “0”, for example, “5”, and “N = 0” in steps SP4 and SP32 at the time of “start heating”. Instead of " Needless to say, even if the configuration is such that “N = 5” is discriminated, the same control processing as that described above can be performed.
[0050]
[Summary of Configuration of Example]
To summarize the configuration of the above embodiment,
Cooling the heat-treated fluid, for example cold / hot water 36b, based on the refrigerant vapor 7c / intermediate liquid 2b obtained by heating the heat-treated fluid heated by the high-temperature regenerator 5 such as the diluted liquid 2a by the heater 6 A flow rate adjusting valve that warms and adjusts the supply of the fuel 65A used for the heating by providing the remaining opening W, for example, a fuel / flow rate adjusting valve V5A, and a source opening / closing valve V6 that fully opens and closes In the absorption refrigeration apparatus 100 having a configuration controlled by
[0051]
The above-described flow rate adjusting valve V5A is fully opened from the above-mentioned remaining opening / closing W to, for example, an opening degree of 100% or fully opened, that is, from the opening degree of 100% to the above-mentioned remaining opening degree by the electric motor V5C that drives the above-described flow rate adjusting valve V5A Unit time drive control means for driving the electric motor V5C by providing a drive time required for driving up to the degree W, for example, a unit drive time T2 obtained by subdividing the full opening / closing drive time T1;
[0052]
When the number of times of driving by the unit driving time T2, for example, the count value obtained by counting the number of times of driving N is a predetermined value, for example, “0”, the motor V6A of the original opening / closing valve V6 is driven. And heating stop means for stopping the heating, that is, heating by the heater 6, by fully closing the original on-off valve V6.
The structure which provides is comprised.
[0053]
[Modification]
The present invention can be carried out with the following modifications.
(1) The full opening of the fuel / flow rate adjusting valve V5A is changed to be controlled so that, for example, the position of the opening degree of 95% is controlled to be in the fully opened state instead of the substantially fully opened position.
[0054]
(2) The unit drive time T2 is set by setting the full opening / closing drive time T1 to the time required for driving from the fully open fuel / flow rate adjusting valve V5A to the remaining opening W.
(3) The fuel / flow rate adjusting valve V5A is constituted by a flow rate adjusting valve that can be fully closed, and the position where the opening degree becomes the remaining opening degree W is set so that the count value becomes a predetermined value, for example, “0”. Set up and configure.
[0055]
【The invention's effect】
  According to the present invention, as described above, the unit driving time is driven by subdividing the driving time from the remaining opening to the full opening or from the full opening to the remaining opening of the flow rate adjustment valve for adjusting the fuel supply amount. Since it is configured to determine that the fuel / flow rate adjustment valve is at the remaining opening position based on the count value of the number of times, when the count value is “0”, the original opening / closing is immediately performed. Heating can be stopped by closing the valve, that is, the fire can be extinguished, delaying the control of heating, adversely affecting other components, and wasting fuelOmitcan do.
[0056]
In addition, the absorption refrigeration apparatus that cools and heats has a feature that a temperature adjustment due to a delay in heating stop causes a delay in temperature control of the cool / warm water, which can eliminate adverse effects that cause discomfort to humans.
[Brief description of the drawings]
1 and FIG. 2 show an embodiment of the present invention, and FIGS. 3 to 6 show the prior art. The contents of each figure are as follows.
FIG. 1 is a block diagram of the entire block and the operation characteristics of the main part
FIG. 2 is a flow chart of main part control processing.
FIG. 3 is an overall block diagram.
FIG. 4 is a diagram illustrating the entire configuration.
FIG. 5 is a block diagram of the main part.
[Fig. 6] Main part block configuration / main part operation characteristic diagram
[Explanation of symbols]
1 Absorber
1A spreader
1B Cooling pipe
2a dilute solution
2b Intermediate liquid
2c concentration
4 pipelines
5 High temperature regenerator
6 Heater
6A exhaust pipe
7a Refrigerant vapor
7b Refrigerant vapor
7c Refrigerant vapor
8 pipelines
9 High temperature heat exchanger
10 pipeline
11 Low temperature regenerator
11A radiator tube
11B passage
12 pipelines
13 Low temperature heat exchanger
13A divider
13B Meander
13C outer shell
14 pipeline
21 pipeline
22 pipeline
23 Condenser
23A cooling pipe
24a Refrigerant liquid
24b Refrigerant liquid
25 pipeline
26 Evaporator
26A spreader
26B heat exchange tube
28 pipelines
28B pipeline
31 pipeline
32a Water for cooling
32b Water return water for cooling
33 pipeline
34 pipeline
35 pipeline
36a Cold / hot water return water
36b cold / hot water
37 pipeline
41 pipeline
42 pipeline
65A fuel
65B insufflator
65B1 electric motor
66 igniter
66A discharge electrode
67A Relay circuit
67B Relay circuit
67C Relay circuit
67D relay circuit
68 Power supply
70 Control unit
70A CPU
71 I / O port
72 Processing memory
73 Working memory
74 Data memory
75 Timekeeping circuit
76 Operation unit
77 Display
81 pipeline
82 pipeline
100 Absorption refrigeration equipment
Nmax Maximum drive count
P1 pump
P2 pump
S1 Temperature detector
S2 Temperature detector
S3 Temperature detector
S4 Temperature detector
T1 last drive time
T2 unit drive time
V1 On-off valve
V2 open / close valve
V4 open / close valve
V5 Heating adjustment valve
V5A Fuel / Flow control valve
V5B Air supply adjustment valve
V5C electric motor
V6 original open / close valve
V6A electric motor
W Remaining opening

Claims (1)

Based on the heat operated fluid heated by the high-temperature regenerator, the heated operation fluid is cooled or heated, and the fuel used for the heating is adjusted by providing a remaining opening, and fully open and fully closed. An absorption refrigeration apparatus having a configuration controlled by a main on-off valve that performs
The electric motor that drives the flow rate adjustment valve is provided with a unit drive time that subdivides the drive time required to drive the flow rate adjustment valve from the remaining opening to the full opening or from the full opening to the remaining opening. Unit time drive control means to perform,
A data memory for storing a count value obtained by counting the number of times of driving by the unit driving time ;
When the original on / off valve is fully closed, it is confirmed that the count value stored in the data memory becomes zero, and the motor of the original on / off valve is driven to fully close the original on / off valve. An absorption refrigeration apparatus comprising: a heating stop unit that stops the heating by performing the above.

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