JPS5841423B2 - Absorption refrigeration equipment that uses waste heat - Google Patents

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to an absorption refrigerating device that utilizes waste heat.

More specifically, absorption refrigeration is a type of absorption refrigeration that is capable of supplying at least one of cold water and hot water by using exhaust heat from combustion exhaust gas, other steam, or hot water that is discharged into the atmosphere from factories, etc. Regarding equipment.

In general, at least one of cold water produced by an evaporator and hot water produced by a hot water heat exchanger connected to a generator; specifically, both the cold water and hot water, or either the cold water or the hot water by switching. On the other hand, in the case of absorption refrigerating equipment that can supply only cold water (hereinafter collectively referred to as supply water), the amount of heat entering the generator and the supply side load of the supply water are mutually exclusive. If the pressure fluctuates, the pressure of the generator may rise abnormally, the capacity may become insufficient and the desired supply water may not be obtained, or the solution may crystallize, making normal operation impossible. The amount of heat input to the generator is controlled by the load on the supply side of the supply water.

When the amount of heat input to the generator is obtained from a dedicated heat source provided for the refrigeration equipment, the amount of heat input can be controlled to ensure that the amount of heat input to the generator changes even if the load on the supply side of the supply water changes. However, when using waste heat without installing a dedicated heating source, the amount of heat input must be controlled by, for example, restricting the flow rate of the waste gas or dividing the flow. For example, the operating status of the heat exhaust system may change, which may affect the machine that can go to the factory.

For example, when using exhaust gas heat from a deodorizing device that performs combustion deodorization, if a throttle valve or bypass valve is installed in the exhaust gas exhaust path to control the amount of heat input to the generator, the internal pressure at the button of the deodorizing device will change, and the deodorizing device will be deodorized. This will impede its functionality.

Therefore, the present invention utilizes waste heat such as the above-mentioned exhaust gas, does not adversely affect the waste heat heat source side, and, regardless of the size of the waste heat amount, the amount of heat is determined according to the load on the supply side of the supply water. It is designed so that it can be driven with
Part 1: Without regulating the exhaust heat from the exhaust heat heat source side
1.The generator is equipped with a radiator and a pressure detector to detect the pressure of the generator, and the pressure when the amount of heat input increases relative to the minimum amount of heat input to the generator The increase is detected and the excess heat input is controlled so as to be radiated. Through this control, even if the supply side load of the supply water and the amount of heat input to the generator fluctuate, the supply water is always maintained at its capacity without excess or deficiency. was made so that it could be taken out.

Therefore, the features of the present invention are as described in the claims, and the first invention described in claim 1 is characterized in that a waste heat heat source is connected to the generator and the evaporator is connected to the exhaust heat source. An absorption refrigeration system that connects a chilled water load and can supply chilled water using the exhaust heat, wherein the generator is connected to a radiator for the exhaust heat that is input to the generator. A heat radiation amount control valve operated by a Modutrol motor is interposed in the connection circuit, and a load detector is provided for detecting the chilled water load and transmitting a control signal according to the load,
A pressure detector is provided to detect an increase in pressure when the amount of heat input increases with respect to the minimum amount of heat input into the generator, and a pressure detector is provided to detect the increase in pressure when the amount of heat input increases with respect to the minimum amount of heat input into the generator. An output signal obtained by subtracting a control signal corresponding to the load applied to the load detector from a control signal obtained by adding the minimum amount of heat input to the generator and an increase in the amount of heat input is given to the Modutrol motor. This is characterized in that the opening degree of the heat quantity control valve is controlled.

Further, the second invention described in claim 2 is based on the first invention, and provides a cold water load to the evaporator and a hot water load to the hot water heat exchanger connected to the shunted generator. The device is connected to enable switching operation between cooling and heating, and is equipped with a heating capacity control valve for hot water produced by the hot water heat exchanger, which is operated by a modutrol motor and receives a control signal according to the valve opening degree. At the same time, a chilled water load detector is provided to detect the chilled water load and issue a control signal according to the load. An output signal is provided by subtracting a control signal transmitted from one of the capacity control valve and the chilled water load detector from a control signal obtained by adding the amount of heat input and the increase in heat input amount, and the valve opening degree of the heat release amount control valve is controlled. It was a great accomplishment.

In addition, the third and fourth inventions described in claims 3 and 4 are based on the first invention, and connect a chilled water load to the evaporator and a generator. The third invention is an absorption refrigeration system that connects each hot water load to a hot water heat exchanger to enable simultaneous operation of cooling and heating. A control valve is provided and operated by a modutrol motor to send out a control signal according to the valve opening degree, and a chilled water load detector is installed to detect the chilled water load and send out a control signal according to the load. , a control signal corresponding to the valve opening degree of the capacity control valve is generated from a control signal obtained by adding the minimum amount of heat input to the generator and an increase in the amount of heat input to the modutrol motor of the heat release amount control valve, and a control signal corresponding to the opening degree of the capacity control valve, and a cold water An output signal obtained by subtracting the sum from the control signal from the load detector is provided to control the valve opening degree of the heat radiation amount control valve.

The fourth invention is to provide a cooling capacity control valve for controlling the cooling capacity of the cold water produced by the evaporator according to the third invention, and to control this control valve with a module control valve in the same way as the hot water heating capacity control valve. It is operated by a motor and sends a control signal according to the valve opening degree.

First, a method for controlling the opening degree of the heat radiation amount control valve according to the present invention will be explained.

This control method detects the load on the supply side of at least one of cold water and hot water, sends a control signal according to this load, and increases the amount of heat input relative to the minimum amount of heat input to the generator. The system is designed to transmit control signals corresponding to the increase in pressure at a given time, and to control based on these control signals, which will be explained based on FIG.

What is shown in Figure 1 is the cooling capacity control valve A that controls the cooling capacity of cold water, the heating capacity control valve B of hot water, and when the amount of heat input increases relative to the minimum amount of heat input to the generator. A pressure detector C for detecting an increase in pressure is provided, and control is performed using control signals appropriate to the operating states of these capacity control valves A, B and pressure detector C.

Although the chilled water cooling capacity control valve A is provided in FIG. 1, the control valve A may not be provided and a chilled water load detector capable of transmitting a control signal according to the chilled water load may be used.

That is, auxiliary potentiometers D 1 * D 2 of the Modutrol motor that operate the capacity control valves A and B;
A bridge circuit G is formed by combining a resistor C1 that converts the pressure of the pressure detector C into resistance and a feedback potentiometer F of a modutrol motor that operates a heat radiation amount control valve E, and the capacity control valve A, The bridge circuit G adds and subtracts the output signal given by the valve opening degree of B, the minimum amount of heat input to the generator, and the increase in the amount of heat input, and the amount of heat radiation control valve E is adjusted to the total amount of heat input of exhaust heat. The valve opening is made to be appropriate and in a predetermined relationship with respect to the total valve opening of the capacity control valves A and B.

The auxiliary pointiometer D1. D2 is the terminal B2. W
2 and B3. Resistors each having a predetermined resistance are connected between W3, and when the wiper a is driven, the resistance r3 between the terminals R2 and R3 communicating with the wiper a and the terminal W21W3 is increased.
．． r4 varies from zero to a maximum value of one.

These wipers a are interlocked by a modtrol motor that operates the capacity control valves A and B, and when the opening degrees of the capacity control valves A and B are zero, the resistances r3m and r4 are at their minimum. becomes zero, and the valve opening becomes t.
When the valve opening is in the intermediate state, the resistances r3s and r4 are at their maximum values. The value r4 increases as the valve opening increases.

As shown in FIG. 3, the pressure detector C transmits the displacement of the detector 2, which is a bellows that receives the generator pressure P, to the wiper a of the resistor C1.
The wiper a of the resistor C1 is driven in accordance with the pressure inside the generator detected by the wiper a, and the resistance r1 between the terminal R1 and the terminal W1 communicating with the wiper a is output as a resistance value commensurate with the detected pressure. The resistance value is determined when the detected pressure is a predetermined minimum value, for example, 700 mmH? The resistance is zero at a predetermined maximum value, for example, 750rurtHf, and the resistance increases at an intermediate pressure as the detected pressure increases.

The pressure detector C of the residue can also be formed as shown in FIG.

That is, the pressure detector C in FIG. 4 includes a detecting body C2 that is vertically displaced in response to changes in the generator pressure P, and a converter C3 that converts the amount of displacement of the detecting body C2 into a current output l. , and a converter C4 that converts the current value input from the converter C2 into a resistance value, and the applied voltage ratio of the pink amplifier coil L1i L2 to which the high frequency voltage is applied in the converter C3 is adjusted up and down by the detecting body C2. This change is caused by the displacement of the moving core C5, and this change is converted into a current proportional to the change in pressure P and extracted, and a resistance signal is obtained by a converter C4.

The feedback potentiometer F controls a modutrol motor M that operates the heat radiation amount control valve E, and has terminals B' and W' built into the motor M.
A resistor having a predetermined resistance is connected between them, and as the wiper a is driven, the resistance r4 between the terminal R' and the terminal W' communicating with the wiper a varies from zero to a maximum value of one.

This wiper a is operated in conjunction with a modtrol motor M that operates a heat radiation amount control valve E, and when the valve opening degree of the heat radiation amount control valve E is zero, the resistance r4 is the minimum value of zero. Therefore, when the valve opening degree is 100%, the resistance r4 has a maximum value, and when the valve opening degree is in an intermediate state, the resistance r4 has a value that increases as the valve opening degree increases.

In addition, H is a cold water temperature measuring device, ■ is a hot water temperature measuring device, and J is a controller that controls the modtrol motor of the capacity control valves A and B for each load of cold water and hot water detected by these temperature measuring devices. C2 is a pressure sensor.

Furthermore, when supplying only cold water, or when switching to supply either cold water or hot water, this can be done by setting the valve opening of the other capacity control valve A or B to zero. However, this case will be explained later based on FIG.

The case where cold water and hot water are supplied at the same time (including the case where the supply amount is constant) will be described in more detail below.

In other words, if the exhaust heat is introduced into the generator from the exhaust heat supply side as if 1x without regulation, and if the minimum amount of heat input of the exhaust heat thus introduced is taken as a standard and this is set as 100, then the generator has this amount. 100 minimum heat input and P% for the minimum heat input
Assuming that the increase in heat input is the same as heat input,
Based on the above minimum heat input of 100, the amount of heat released by the radiator is set as the factor z, and the amount of heat released by the absorber and condenser is given as the factor Q.
%, the amount of heat dissipated in the water heater (hot water heating capacity) is Y%, and the amount of heat input in the evaporator (chilled water cooling capacity) is X%, then cold water and hot water are used simultaneously (however, if one of them is zero) Since the amount of heat output and the amount of heat input are equal, Z+Q+Y=X+100+P (however, Z, Q, Y).

x and p are both ≧0) Therefore, the amount of heat radiated by the radiator 2 is Z = 100 +P+X -Y-Q becomes.

The efficiency of the refrigeration cycle applied to the dual-effect absorption refrigerator is 1.0, and the amount of heat generated to exert the specified chilled water cooling capacity is equal to the chilled water cooling capacity (refrigeration capacity), so the specified chilled water cooling capacity (refrigeration capacity) is equal. The amount of heat dissipated by the absorber and condenser in the refrigeration cycle when the chilled water cooling capacity X is exerted is the sum of the amount of heat generated to exert the chilled water cooling capacity and the chilled water cooling capacity X, that is, 2X Therefore, Z=100+P+X-Y-2X and Z=(1oO+p-(x+y)).

From this, in the example shown in Figure 1, the amount of heat radiated by the radiator can be controlled by the value obtained by subtracting the sum of the cold water load and hot water load from the waste heat (100+P) input to the generator. It turns out.

Therefore, the bridge circuit G shown in FIG. 1 is formed so as to satisfy the above relational expression as shown in FIG. 2.

That is, the auxiliary potentiometer D1 of the cooling capacity control valve A
One side of the resistor C1 of the pressure detector C and one side of the feedback potentiometer F are connected in series, and the other side of the auxiliary potentiometer D1 and the auxiliary potentiometer D2 of the heating capacity control valve B are connected in series. A bridge circuit G is formed by connecting the other side of the feedback potentiometer F in series, and the resistance of the auxiliary potentiometer D11 and the feedback potentiometer F is set to 1/2 of the resistance of the auxiliary potentiometer D2 and the resistor c1. It is.

As is clear from FIG. 2, the bridge circuit G connects the terminal R1 of the resistor C1 to the feedback potentiometer F.
connected to the open side terminal B' of the resistor C1 and the low voltage side terminal W1 of the resistor C1.
is connected to the open side terminal B2 of the auxiliary potentiometer D1, and the closed side terminal W2 of this auxiliary potentiometer D1 is connected to the terminal R3 of the auxiliary potentiometer D2,
Connect the closed side terminal W3 of this auxiliary potentiometer D2 to the closed side terminal W' of the feedback potentiometer F,
The terminal R2 of the auxiliary potentiometer D1 is connected to the terminal R' of the feedback potentiometer F via a series circuit connected to the power supply.

In addition, in Fig. 2, the buttons Ml and N2 are electromagnets, and N1. N2 is a rotating coil, 01 and 02 are relay contacts, T1. T2 is a terminal, and this terminal T1. The AC power source is interposed between T2.

When the above-mentioned bridge circuit is pressed and the openings of the capacity control valves A and B are controlled to close, the auxiliary potentiometer D1. Wiper a of D2 operates in the open or close direction,
Further, when the strain force of the generator detected by the pressure detector C fluctuates, the wiper a of the resistor C1 operates to the high pressure side or the low pressure side in accordance with the pressure fluctuation. Accordingly, the terminal R1-Wl s B2 # R
2s R2 # W2s R3 ° The resistance between R3 increases and decreases, and the bridge circuit G becomes unbalanced, and the electromagnet M1. M2
A difference occurs in the electromagnetic force between the relay contacts C1 and O2, which causes a current to flow clockwise or counterclockwise to rotate the motor M and control the opening of the control valve E. , when the amount of heat input to the generator is constant and the load of cold water and hot water increases and the capacity control valves A and B operate in the opening direction,
The heat radiation amount control valve E is controlled in the closing direction to reduce the amount of heat radiation from the radiator.

Also, when the load of cold water and hot water is constant and the amount of heat input to the generator increases and wiper a of resistor c1 operates to the high pressure side,
The heat radiation amount control valve E is controlled in the opening direction to increase the amount of heat radiation from the radiator.

Now said terminal B2. W2. The resistance between B' and W' is 100,
Terminal B1. Wl, B3. The resistance between R3 is 20
0, and the valve opening of cooling capacity control valve A is set to X%.

The valve opening degree of the heating capacity control valve B is YaI), the ratio of pressure increase detected by the pressure detector C when the heat input increases with respect to the minimum heat input amount is P%, and the valve opening degree of the heat release amount control valve E is Z%, the resistance r1 between the terminals R1 and R1 of the resistor C1, the auxiliary potentiometer D1. Terminal B2 of D2. Resistance r3 between R2, resistance r4 between terminals R2 and R2, resistance r5 between terminals B/ and R7 of feedback potentiometer F
, the resistance r6 of the terminals R' and W' is as follows.

Here, the bridge circuit G maintains a balanced state from the terminal R2 to the terminal B2°Wl in the bridge circuit G.
Combined resistance r2+ through R1, B, and B' to R'
r1+r5, and from terminal R2 to terminal W2. B3゜R3,R
3. Combined resistance r3+r4 through W and W' to R'
+r6 is equal.

Therefore, the valve opening degree of the heat release amount control valve is determined from the total amount of waste heat input to the generator (100+P)%, and the valve opening degree of the cooling capacity control valve A is set based on the chilled water load and the hot water load. Opening degree X% and valve opening degree Y% of the heating capacity control valve B
The opening degree will be controlled by subtracting the sum of .

In the above description, cold water and hot water are supplied simultaneously, but a system that can supply either cold water or hot water by switching will be explained based on FIGS. 5 and 6.

That is, the valve opening degree control method of the heat release amount control valve is as shown in FIG. The current contact of the changeover switch SW1 is connected to the temperature measuring element H.
or the changeover switch Sw1 via the controller N that controls the capacity control valve or the modutrol motor B for each load of cold water or hot water detected by I.
Connect to the common contact of the changeover switch SW1 that is linked to the switch SW1.

Then, the cooling and heating contacts of this changeover switch SW1 are connected to the capacity control valves A and B, and these capacity control valves A and B are connected to each other.
Alternatively, the auxiliary potentiometers D1 and D2 of the modutrol motor that operates B are connected to the changeover switch SW1.
．． The cooling and heating contacts of the changeover switch SW3 communicating with SW2 are connected to the respective changeover switches SW1. SW2
．． By switching SW3, a bridge circuit T1 is formed by combining the auxiliary potentiometer D1 or D2 on the switching side, the resistor C1, and the feedback potentiometer F of the Modutrol motor that operates the heat radiation amount control valve E. The amount of heat control valve E is set to have a valve opening that corresponds to the increase in the amount of heat input and has a predetermined relationship with the valve opening of the capacity control valve A or B.

That is, the changeover switch SW1. SW2. The heat balance when SW3 is switched to the cooling side and only cold water is supplied is that the heat output and heat input are equal, so Z+Q=100+
P, and the heat radiation amount 2 by the radiator has the relationship Q=2X, so Z=(100+P)-X.

That is, the amount of heat radiated by the radiator can be controlled by the value obtained by subtracting the cold water load from the exhaust heat (100+P) input to the generator.

Further, the changeover switch SW1. SW2. The heat balance when SW3 is switched to the heating side to supply only hot water is Z+Y=100+P, and Z=(100+P)-Y.

That is, the amount of heat radiated by the radiator can be controlled by the value obtained by subtracting the hot water load from the exhaust heat (100+P) input to the generator.

Therefore, the bridge circuit G1 shown in FIG. 5 is formed so as to satisfy the above relational expression as shown in FIG.

That is, each changeover switch SW1. SW2. When supplying cold water by switching SW3, the auxiliary potentiometer D1 forms a bridge circuit G1, and the auxiliary potentiometer is connected to the terminal R connected to the wiper a of the meter D1.
Resistor r3 between 4 and 34 and terminals R1, W1 of resistor C1
The resistance r1 between terminals B/ and R7 of feedback potentiometer F are connected in series, and the resistance r7 between terminals R4 and W4 of auxiliary potentiometer D0 and terminal R of feedback potentiometer F are connected in series.
', W' are connected in series with the resistor r8, and the terminal R4
It is as if a power supply is connected between ゜R'.

Terminal B4゜W4 of auxiliary potentiometer D1 and terminals B' and W' of feedback potentiometer F.
The resistance between 100. terminal B1 of resistor C1. The resistance between W1 is 200, and the opening degree of cooling capacity control valve B is X%.
, the rate of pressure increase detected by the pressure detector C is P%, and the valve opening degree of the heat release control valve E is 1, then the resistance r1h r
5*r6*r7mr8 are respectively as follows.

Here, since the bridge circuit G maintains a balanced state, (100-X)+(2P)+(100-Z)=(X)+
(Z) That is, the relationship Z = (100+P) -X is established, and the valve opening degree of the heat release control valve E is set based on the total amount of waste heat (100+P) entering the generator, and the chilled water load. The opening of the cooling capacity control valve A is subtracted by the opening Yqb of the cooling capacity control valve A.

In addition, each changeover switch SW1. SW2. When supplying hot water by switching SW3, the auxiliary potentiometer D2 force and the bridge circuit G1 are configured.The difference from when supplying cold water is that the valve opening X% of the cooling capacity control valve A is Instead, the opening degree Y% of the heating capacity control valve B is used.

That is, the relationship is established, and the valve opening degree of the heat radiation amount control valve is the valve opening degree of the heating capacity control valve B set by the hot water load from the total amount of exhaust heat input to the generator (100+P). Y%
The opening will be controlled by subtracting the opening.

In addition, when only cold water is supplied, selector switch SW1. SW2. It is sufficient to remove SW3, hot water temperature measuring element (3), and heating capacity control valve B, and the bridge circuit may be constructed in the same manner as shown in FIG. 6.

Although the systems described above all use the cooling capacity control valve A, this cooling capacity control valve A is not necessarily required.

If the cooling capacity control valve A is not provided, a chilled water load detector for detecting the chilled water load is formed, and this load detector is formed by a modutrol motor equipped with an auxiliary potentiometer D1, and the bridge circuit G
, G1 are the same as when using the cooling capacity control valve A.

Next, an embodiment of the absorption refrigerating apparatus of the present invention capable of simultaneously supplying cold water and hot water will be described with reference to FIG.

The refrigeration system shown in Fig. 7 is a double-effect absorption refrigeration system, in which a high-temperature generator 1 is connected to a heat exhaust pipe 2 connected to a waste heat heat source such as exhaust gas, and the waste heat from the waste heat heat source is regulated. At the same time, a radiator 3 is connected to the high temperature generator 1 for dissipating heat when the waste heat is excessive with respect to the cold/hot water load. 1
The pressure detector C is provided to detect an increase in pressure when the amount of heat input increases with respect to the minimum amount of heat input.

The radiator 3 is provided with a heat exchange tube that communicates with the cooling water pipe 12, and the heat exchanger tube exchanges heat with the high-temperature refrigerant vapor from the high-temperature generator 1. The drain pipe 4 connecting to the container 1 is provided with the heat radiation amount control valve E for controlling the amount of heat radiation.

This control valve E controls the pressure of the generator 1 so as not to exceed a predetermined value by adjusting the amount of heat released from the heat radiator 3. By closing the control valve E, Drain is stored in the radiator 3, and the heat exchange tube is buried by the drain to reduce the heat radiation area.By adjusting the opening degree of the control valve E, the amount of heat radiation can be controlled.

The cooling capacity control valve A that controls the cooling capacity of the cold water is branched from a solution pipe, in the embodiment shown in FIG. 7, a solution pipe 6 connecting the absorber 5 and the high temperature generator 1, The heating capacity control valve B, which is installed in the bypass pipe 6' passing through the water, adjusts the amount of solution circulation, and also controls the heating capacity of hot water.
It is installed in the drain pipe 8 of the hot water heat exchanger 7 connected to the high temperature generator 1.

Note that the cooling capacity control valve A is connected from the low temperature generator 9 to the condenser 1.
The refrigerant pipe 11 may be interposed in the middle of the refrigerant pipe 11 leading to zero, and the amount of refrigerant flowing into the condenser 10 may be adjusted.

Furthermore, the heat release amount control valve E and the heating capacity control valve B may be three-way valves.

In this case, as shown in FIG. 7, a bypass pipe 13 is provided between the inlet side and the outlet side of the cooling water pipe 12, and a bypass pipe 13 is provided between the inlet side and the outlet side of the hot water pipe 14 connected to the disconnected hot water heat exchanger 7. A bypass pipe 15 is provided between these bypass pipes 13゜13.
The heat radiation amount control valve E and the heating capacity control valve B, which are controlled from the three-way valve, are interposed at the junction of the cooling water pipe 12 and the hot water pipe 14.

Further, in FIG. 7, 16 is an evaporator, and a cold water pipe 17 is connected to the evaporator 16. The refrigerant liquefied in the condenser 10 is pumped by a refrigerant pump 18, and is discharged from the spray nozzle 16a. It is sprayed on the cold water pipe 17, and the latent heat of vaporization is taken away from the water to be cooled flowing inside the pipe to cool it and form cold water.

Further, 19 is a solution pump, 20 is a low temperature heat exchanger, and 21 is a high temperature heat exchanger.

According to the above configuration, the refrigerant is absorbed into the solution in the absorber 5, and is driven by the solution pump 19 to pass through the solution pipe 6, the low temperature heat exchanger 20, the high temperature heat exchanger 21, and the high temperature generator 1. Here, it is heated by the exhaust heat, becomes refrigerant vapor, separates from the solution, flows through the refrigerant pipe 11, enters the condenser 10 together with the refrigerant separated by the low temperature generator 9, and cools the cooling water pipe 12. The liquid refrigerant exchanges heat with water, condenses, enters the evaporator 16, takes heat from the cooled water flowing through the cold water pipe 17, evaporates, and is absorbed into the solution again in the absorber 5, starting the refrigeration cycle. Repeat.

In the cycle described above, cold water is produced by evaporating the refrigerant in the evaporator 16, and the high temperature refrigerant vapor generated in the high temperature generator 1 is led to the hot water heat exchanger 7, and the hot water flowing through the hot water pipe 14 is heated. It heats warm water to make hot water.

When the above operation is pressed, the amount of waste heat input to the high temperature generator 1 fluctuates, and the pressure inside the high temperature generator 1 fluctuates. The heat quantity control valve E is operated to automatically adjust the heat dissipation capacity of the radiator 3.

In addition, when the cold water load fluctuates, a temperature measuring element H detects this.
The cooling capacity control valve A is operated according to the fluctuations via the controller J, and the cooling capacity is automatically adjusted. The heating capacity control valve B is operated in accordance with the fluctuation, and the heating capacity is automatically adjusted.

Then, when the resistance value of the pressure detector C is adjusted as described above and the valve opening degrees of the capacity control valves A and B are adjusted according to the amount of exhaust heat input to the high temperature generator 1 or fluctuations in each load, as described above,
When the bridge circuit G described above becomes unbalanced, the heat radiation amount control valve E is controlled at a valve opening degree of a certain proportion corresponding to the resistance value of the pressure detector C and the valve opening degrees of these capacity control valves A and B, and the generator 1 can be maintained at a predetermined safe value, and the cold water and hot water can be maintained at a constant temperature regardless of the amount of heat input to the generator 1 and fluctuations in the load.

That is, if the amount of heat input to the generator 1 increases, the pressure inside the generator 1 increases, and the resistance output of the pressure detector C becomes sharper, the opening degree of the heat release amount control valve E increases. The valve opening degree is controlled to a value obtained by subtracting the total valve opening degree of the capacity control valves A and B from the total amount of exhaust heat input to the generator 1.

The amount of heat dissipated increases as the amount of heat input increases, and the amount of heat dissipated decreases as the amount of heat input decreases.

Further, if the amount of heat input to the generator 1 is constant, and the load increases and the opening degrees of the capacity control valves A and B become sharper, the opening degree of the heat release amount control valve E becomes smaller. , the valve opening is the sum of the valve openings of the capacity control valves A and B, and the generator 1
Controlled to a value subtracted from the total amount of waste heat input.

The amount of heat dissipated is reduced as the load increases, and the amount of heat dissipated becomes zero at the maximum load.The amount of heat dissipated is increased as the load decreases, and the amount of heat dissipated is the maximum at the minimum load, that is, 100% heat dissipation. .

It should be noted that the controllers J and K were explained as having temperature measuring elements H and I installed on the outlet sides of the cold water pipe 17 and the hot water pipe 14 to detect the cold water and hot water outlet temperatures and operate. , the temperature inside the evaporator 16, the temperature inside the hot water heat exchanger 7, etc. may also be detected, in other words, the change in load is detected and activated.

In order to be able to supply cold water or hot water by switching, the control system shown in FIG. 5 is used, and the heat radiation amount control valve E is controlled by constructing the system as shown in FIG. 9.

That is, the changeover switch SW1. SW2. When SW3 is switched to the cooling side to supply only chilled water, if the chilled water load fluctuates, the cooling capacity control valve A is operated according to the fluctuation via the temperature sensor H and controller N that detects this. As a result, the valve opening becomes the above-mentioned X%, and the cooling capacity is automatically adjusted, making it possible to maintain the cold water temperature at a constant value.

During this operation, when the amount of waste heat input to the high temperature generator 1 fluctuates and the pressure inside the high temperature generator 1 fluctuates by the above P%, the fluctuation is detected via the pressure detector C which detects the fluctuation of this P%. The heat release amount control valve E is operated in accordance with
O+P)-X%, and the heat radiation capacity of the heat sink 3 is automatically adjusted.

Moreover, the said changeover switch SW work, sw2. When sw3 is switched to the heating side to supply only hot water, if the hot water load fluctuates, the heating capacity control valve B is activated in response to the fluctuation via the temperature sensing element ■, which detects this, and the controller N. When operated, the valve opening becomes Y%, and the heating capacity is automatically adjusted, making it possible to maintain the hot water temperature at a constant value.

During this operation, when the amount of waste heat input to the high temperature generator 1 fluctuates and the pressure inside the high temperature generator 1 fluctuates by the above P%, the fluctuation is detected via the pressure detector C which detects the fluctuation of this P%. The heat radiation amount control valve E is operated in accordance with
00+P)-Y%, and the heat dissipation capacity of the radiator 3 is automatically adjusted.

In addition, in order to configure the system to supply only cold water, click the embodiment shown in FIG.
Selector switch SW1. SW2. Sw3 and hot water thermometer ■
All you have to do is remove it.

In addition, in the embodiments shown in FIGS. 7 and 9, a cooling capacity control valve A is provided, but since the amount of heat input to the generator for exerting the cooling capacity is controlled by the heat radiation amount control valve E, The cooling capacity control valve A is not necessarily required.

In this case, a chilled water load detector for detecting the chilled water load is formed, and this load detector is formed by a modutrol motor equipped with an auxiliary potentiometer D1, as described above.

As described above, according to the present invention, waste heat from the waste heat heat source is introduced into the generator without being regulated, and excess heat is radiated by the radiator, so that there is no adverse effect on the waste heat heat source. Moreover, the excess amount can always be detected reliably by using a pressure detector to detect the pressure increase when the amount of heat input increases relative to the minimum amount of heat input to the generator.
Since heat can be radiated from the radiator, the pressure in the generator can always be maintained at a normal value, and there is no abnormal concentration of the solution, allowing safe operation.

That is, regardless of the amount of heat input of waste heat to the generator, at least one of cold water and hot water, more specifically, both the cold water and hot water, or one of the cold water and hot water by switching, or only cold water. In any case, it is possible to always supply just enough water.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an example of the operation control system of the device of the present invention, Fig. 2 is a bridge circuit diagram, Figs. 3 and 4 are explanatory diagrams showing an embodiment of the pressure detector, and Fig. An explanatory diagram showing another example of the operation control system of the inventive device, FIG. 6 is a bridge circuit diagram thereof, FIG. 7 is a refrigeration cycle diagram showing one embodiment of the inventive device, and FIG. 8 is a diagram showing another embodiment. A partial refrigeration cycle diagram shown in FIG. 9 is a refrigeration cycle diagram showing another embodiment of the apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Generator, E... Heat radiation amount control valve, 3... Heat radiator, A... Cooling capacity control valve, B... Heating capacity control valve, C... Pressure detector.

Claims (1)

[Scope of Claims] 1. An absorption refrigeration system in which a waste heat heat source is connected to a generator, a chilled water load is connected to an evaporator, and chilled water can be supplied using the waste heat, which A radiator for waste heat that enters the generator is connected to the generator, and a heat radiation amount control valve operated by a Modutrol motor is inserted in this connection circuit, and the chilled water load is detected and the load is A load detector is installed to send a control signal according to the increase in pressure, while a pressure detector is installed to detect the increase in pressure when the amount of heat input increases relative to the minimum amount of heat input into the generator. The module control motor of the heat radiation amount control valve is activated to send a control signal to the load detector based on a control signal that is the sum of the minimum amount of heat input to the generator and the increase in the amount of heat input. An absorption refrigeration system using exhaust heat, characterized in that an output signal obtained by subtracting a control signal according to the load is provided to control the valve opening degree of the heat radiation amount control valve. 2 Connect the exhaust heat heat source to the generator, apply cold water load to the evaporator,
Further, the absorption refrigeration apparatus is capable of switching operation between cooling and heating by connecting hot water loads to hot water heat exchangers connected to the generator, respectively, wherein heat is input to the generator. A heat radiator for waste heat is connected, a heat radiation amount control valve operated by a Modutrol motor is interposed in this connection circuit, and a heating capacity control valve for hot water produced by the hot water heat exchanger is provided to control the heating capacity. The control valve is operated by a motor equipped with an auxiliary potentiometer to send a control signal according to the valve opening degree, and a chilled water load detector is installed to detect the chilled water load and send a control signal according to the load. At the same time, a pressure detector is provided to detect an increase in pressure when the amount of heat input increases with respect to the minimum amount of heat input into the generator, and is configured to transmit a control signal in accordance with the increase in pressure,
A control signal transmitted from one of the capacity control valve and the chilled water load detector based on a control signal obtained by adding the minimum amount of heat input to the transmitter and the increase in the amount of heat input to the modutrol motor of the heat radiation amount control valve. Absorption type 3 for waste heat utilization, characterized in that an output signal obtained by subtracting the amount of heat is given to control the opening degree of the heat release control valve. , and an absorption refrigeration system capable of simultaneously operating cooling and heating by connecting a hot water load to a hot water heat exchanger connected to the generator, wherein heat is input to the generator. A heat radiator for waste heat is connected, and a heat radiation amount control valve operated by a Modutrol motor is interposed in this connection circuit, and a heating capacity control valve for hot water produced by the hot water heat exchanger is provided to increase the capacity. The control valve is actuated by a modutrol motor equipped with an auxiliary potentiometer to transmit a control signal according to the valve Mli, and a chilled water load detector detects the chilled water load and transmits a control signal according to the load. and a pressure detector that detects an increase in pressure when the amount of heat input increases with respect to the minimum amount of heat input into the generator, and transmits a control signal in accordance with the pressure increase, and controls the amount of heat released. A control signal corresponding to the opening degree of the capacity control valve is generated from a control signal obtained by adding the minimum amount of heat input to the generator and an increase in the amount of heat input to the modutrol motor of the valve, and a control signal from the chilled water load detector. An absorption refrigeration system using exhaust heat, characterized in that an output signal obtained by subtracting the sum of additions from a signal is given to control the valve opening degree of the heat radiation amount control valve. 4 Connect the exhaust heat heat source to the generator, apply cold water load to the evaporator,
Further, the absorption refrigeration apparatus is capable of simultaneous operation of cooling and heating by connecting hot water loads to hot water heat exchangers connected to the generator, respectively, wherein heat is input to the generator. A heat radiator for exhaust heat is connected, and a heat radiation amount control valve operated by a Modutrol motor is interposed in this connection circuit, and a cooling capacity control valve for controlling the cooling capacity of the cold water produced by the evaporator; A heating capacity control valve for hot water produced by a heat exchanger is provided, and each of these capacity control valves is operated by a modutrol motor equipped with an auxiliary potentiometer to transmit a control signal according to the valve opening degree, while Providing a pressure detector that detects an increase in pressure when the amount of heat input increases with respect to the minimum amount of heat input into the generator,
A control signal corresponding to the increase in pressure is transmitted, and the cooling capacity is determined by the modutrol motor of the heat radiation amount control valve from a control signal that is the sum of the minimum amount of heat input to the generator and the increase in the amount of heat input. Provides an output signal obtained by subtracting the sum of control signals according to the valve opening degrees of the control valve and the heating capacity control valve,
An absorption refrigeration system using exhaust heat, characterized in that the opening degree of the heat radiation amount control valve is controlled.