JPS58123068A - Absorption type cold and hot water machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The invention relates to an absorption type water chiller/heater, and particularly to an absorption type chiller/heater.
This relates to an absorption type water chiller/heater that heats and takes out hot water in the water storage and water supply, and then cools and bottles the cold water with a rock generator.

Conventionally, the system is operated so as to supply a constant flow of hot water to the hot water load, so when the hot water load is reduced, the temperature difference between the negative hot water inlet and outlet becomes small. Therefore, if you try to control the hot water temperature given to the hot water load at a constant level, the temperature of the hot water taken from the hot water load to the absorption chiller will increase as the hot water load decreases, which will cause the absorber temperature to rise. As a result, the efficiency of the cold water side decreases considerably. Furthermore, if the temperature of the hot water returned to the absorption chiller is controlled to be constant, the temperature applied to the hot water load will decrease, and the utility value of the hot water will therefore decrease.

The present invention solves the above-mentioned technical problems and provides an absorption type water chiller/heater that maintains the efficiency of cold water by controlling the flow rate sound of hot water and completely prevents the deterioration of the utility value of hot water. The purpose is to

Embodiments of the present invention will be explained below with reference to the drawings.

Figure 1 is a system diagram of an embodiment of the present invention. In this V& receptacle type water chiller/heater, the dual-effect absorption type chiller/heater functions as a heat pump, and the cold water cooled by the evaporator 2 is passed through the chilled water circulation circuit 11 to the /'& chamber 15. The heated water is heated in the extractor 3 and the condenser 4 and is supplied to the heater 20 via the hot water circulation circuit 16.

2] [Effective absorption refrigerating machine l consists of an evaporator 2, an absorber 3, a high temperature generator 5, a low temperature regenerator 6, a condenser number and a heat exchanger 7.
．． It consists of 8 etc. Fuel, such as city gas, is supplied to the high temperature regenerator 5 via a pipe line lo equipped with a current control valve 9, and the combustion heat is transferred to the double-effect absorption refrigeration fa.
It is said to be a source of 11 kinetic heat.

In the chilled water circulation circuit 11, the inlet of each air conditioner 15 is commonly connected to the chilled water supply header 13, and each air conditioner 4115 is connected in common to the chilled water supply header 13.
The outlets of the two are commonly connected to the cold water selector header 14. Coil 2 installed in cold water return header ″14 and evaporator @2′
The coil 2a is connected to one end of the coil 2a by a pipe 11m that includes the pump 12, and the other end of the coil 2a is connected to the cold water supply header 13 by a pipe 16tib. In such a cold water circulation circuit 11, the cold water cooled by the coil 2a is supplied from the cold water supply header 13 to the valley cooling chamber 15 and left to cool, and the water after being cooled is sent to the coil 2 by the pump 12.
& cooled by circulation.

In the hot water o/I bulk circuit 16, the population of each heater 2o is commonly connected to the hot water supply header 18, and each heater 2o is connected in common to the hot water supply header 18.
0 outlets are commonly connected to the hot water return header 19. The hot water FC#) header 19 connects the pipe line 16 with the pump 17.
The coil 3alC in the absorber 3 is connected through the ai.

This coil 3a is connected to: in the fibrillation 4 (7): 2 coil 4a, and the coil 4a is connected to the hot water supply header 18 via the conduit 16 +'i. In the hot water m-block circuit 16, hot water heated by the coils 3a and 4a is supplied from the hot water supply header 18 to each heater 20 and radiates heat, and water from the heat radiator is circulated through the coil 31LK from the hot water return header 19 by the pump 17. be done.

In the middle of the V paste 16a in the hot water O/I block circuit 16, there is a tr
An i-viber x-pipe M40 is connected, and this bypass 1
The passage 40 and '111M16a are connected via a three-way valve 25'i. The bypass pipe line 4o is provided in a heat exchanger 28 as a hot water simulating load, and the heat exchanger 28 is connected to a cooling water circulation 11 approximately 41 provided in order of a cooling tower 29 and a pump 30t. In this cooling water circulation circuit 41, the heat radiated from the bypass pipe 40 in the heat exchanger 28 is radiated in the cooling tower 29. In the middle of the pipe llb between, there is a q water outlet m[
A detection winding 35 is provided, and a detection signal from this cold water outlet temperature detector 35 is manually inputted to a cold water temperature regulator 36. In the Mayu hot water circulation circuit 16, there is a jlg in the middle of the electric line 16a.
A hot water return temperature detector 522 is provided, and the detection signal from the hot water return temperature detector 22 is determined to be the hot water temperature [l1
It takes 1M and 37K manpower. Furthermore, high temperature playback tit5
A temperature sensor 31 is provided, and a detection signal from this temperature detection gain 31 is inputted to a temperature regulator 38 . The signals from each temperature controller 36, 37, 38 are given to a partial signal selector 32, which
The FAT @ machine 36, 37, and 38 are carefully selected, and the opening of the flow rate control valve 9 at the Kanro IO is fully adjusted based on the selected rice supply.

In the chilled water temperature regulator 36, as shown in FIG. 2+11, the output signal is increased proportionally as the chilled water outlet temperature rises. Further, the set value of the cold water outlet temperature is set to, for example, 90, and a proportional band is set in the range of 9±1O. In the hot water eccentricity regulator 37, as shown in FIG.
As shown in 2), the output signal increases proportionally as the hot water return temperature increases. The set value of this hot water return temperature is set to 390, for example, and the proportional band is carried to the set value ±20. In addition, regenerator temperature - moderator 38
At 1C, as the temperature of the regenerator decreases, the output signal increases proportionally, as shown in FIG. 2(3). The set value of the regenerator temperature is selected to be, for example, 15.50, and the ratio IIl band is traced within the range of ±50 of the set value.

1! ! As shown in FIG. 2(4), the number selection 32 is divided into a high selector 32a and a low selector 32b'.

In the high selector 32a, a storm logic iil'I device 3
Among No. 1- from 6°37, the ten thousand signal station with the largest combustion amount is selected. This selected signal is passed to the next low selector 3.
In 21), the reproduction S temperature tpjtj! Is it a signal that is softer compared to the signal from J-38 and has a smaller combustion amount? The selected signal tt' is outputted as a firing control signal, and the flow rate control valve 9 is controlled thereby.

In other words, the control of the combustion amount in still temperature regeneration step 5 is ++4
When the setting value of the warm water level 5 is sufficiently lower than, for example, 155°0, it is controlled by the signal of the greater of the cold water side and warm water side burner *award. In addition, even if the amount of combustion required from the cold water side or hot water is large, it can be heated for 17 hours! !
The temperature of 7iI5 reaches a hot pot state exceeding 155°C,
If the output of the regenerative dynamic temperature controller 38 is smaller than the required combustion amount, the temporary control valve 9 is controlled by the output of the regenerator temperature controller 38. In other words, the signal returner 32 operates as a combustion amount limiter.

Referring again to Fig. 2 ill to Fig. 2 (4), the cold water temperature vI4 controller 36 sends a 1♡ signal indicated by the diameter reference a, and the hot water temperature regulator 37 sends a signal indicating the reference number a. , Tansei Temperature Control lol
Let us imagine a state in which the signals shown in the preceding row C from the J device 38 are input to the signal selector 32, respectively. In such a situation, the driving condition of the chilled water load will be determined. In this way, in the high selector 32a of the signal selector 32,
The signal a(((()) which is the larger of the output signals a and b is selected, and the signal a(((No. is selected and output, and the flow control valve 9 is controlled once by this signal a.The flow control valve 9 is fully closed when the output signal is 20 mA, and is fully closed when the output signal is 4 mm.

In this way, each temperature reducer 36,
37. Is it OK to select Ig from 38? 1 control valve 9 Sho FJL? By adjusting f'', the control of the cold water negative value living body and the hot water load living body is automatically and continuously performed.Therefore, even if Tanigai Mukai is on the other side, the 7th 1I4
The key is whether it can respond stably and sufficiently to tJ. Moreover, since the temperature of the high-temperature regenerator 5 is detected to control the combustion amount, the combustion it- in the high-temperature regenerator 5 can be controlled to almost the maximum capacity. Furthermore, if the water temperature in the high-temperature regeneration-5 is low at the start of operation, combustion can be achieved up to the rated point of the normal refrigeration cycle, making it possible to shorten the warm-up time.

In the middle of the pipe line 16a in the hot water circulation circuit 16, there is a second
A hot water return temperature detector 34 is provided, and a detection signal from this hot water return temperature detection @3A is input to the temperature difference regulator 23. In addition, a hot water supply temperature detector 24 is provided in the middle of the pipe line 16m.
4 is given to the temperature difference regulator 23. Furthermore, a hot water flow rate control valve 21 is provided in the middle of the pipe 16a, and gjA & of this hot water flow rate control valve 21 is controlled by a temperature difference regulator 23. The opening degree of the hot water flow rate control valve 21 is adjusted so that the detected temperature difference between the detector 34 and the hot water feed temperature detector 24 is constant.

3. For example, in the temperature difference regulator 23, set the temperature difference Δt=40 and set the ratio? Let 11 yu be 20. Moreover, the flow rate control valve is controlled by the warm water flow rate, and its proportional value (if set to z20, the hot water feed temperature with respect to the hot water load is shown by the direct spinning of brown 3 fi +,
The hot water return temperature is indicated by circle #B. In addition, hot water frL and hot water are determined by m1No in Figure 3 (2). As is clear from Figure 3, the temperature is relatively stable at both the sending and returning temperatures of the hot water, and the efficiency of the cold water side is maintained sufficiently. Since it has been preserved, it has sufficient value for storage. For the sake of discussion, if we show the hot water supply temperature for one unit when hot water is supplied at a constant flow rate as in the past, it becomes as shown by the single point in Figure 3 (1). As the temperature decreases, the hot water supply temperature decreases.

Continuing from FIG. 1, the signals from the cold water temperature controller 36 and the hot water temperature controller 37 are inputted to the tsukugo hiba b 33. This No. 15 ratio IP9km 33 softens the ratio of thick/11 of both signals, distinguishes whether the cold water load is mainly or the water leakage is mainly in the negative direction, and sends a signal to the regulator 27 for controlling the three-way valve 25. input. The regulator 27 also includes a pipe line 1.
Detection g from the temperature sensor 26 which is lower than the three-way valve 25 at 6 m fL1111Kwi! +5 is given.

v14 saver 2f controls the three-way valve 25 to prevent hot water from flowing into the bypass pipe line 40 when the signal from the water heater 33 indicates that the hot water main operation is not possible. In addition, in the case of cold water load-based operation, the three-way valve 25 is controlled according to the temperature detected by the temperature detector 26, and some of the hot water radiates heat at the heat exchange base 28 as the load. It should be noted that when the pump 30 in the cooling water circulation circuit 41 is mainly operated with a hot water load and the three-way valve 25 starts to open in order to open the inflow of hot water to the bypass pipe 40, the regulator 27
is driven by a signal from Pump 30 from that K
This prevents unnecessary operation.

By dissipating heat through the heat exchanger 28 as a heavy load in this way, the heat balance of the entire absorption type water chiller/heater l is as shown in FIG. 4. In other words, the human heat lid Q, l to the heated regenerated sushi 5 and the amount of heat input Q2 to the fish generator 2 become the entire human heat warehouse Q3,
Part of it is given to PfAiai:Q4 or hot water load,
The remaining energy will be given to Q5 or Uhobo Kai. In this way, by dissipating heat to the K M artificial shell, 8145
Absorption type water chiller/heater 1 spreads over a wide range indicated by diagonal lines in the diagram.
It becomes possible to drive.

Although the embodiment described above uses a two-l effect absorption refrigeration system, the invention can be practiced in conjunction with other absorption refrigeration machines. Further, instead of the heater 20, a hot water heat exchanger may be provided. Furthermore, the heat given to the local temperature generator 5 does not have to be the combustion heat of the fuel, and may be supplied by electric power or by introducing high-temperature waste gas. In addition, in order to apply electric power, in place of the flow rate control valve 9, it is sufficient to use a device 6 for controlling the electric power applied t.

As described above, according to the present invention, the amount of hot water in the hot water circulation circuit is controlled so that the temperature difference before and after the hot water load is approximately 1 liter, so that each hot water drum in the hot water load 11) becomes approximately -. Therefore, even if the hot water load is reduced, the efficiency of the cold water side will not decrease, and the hot water will remain at a relatively high temperature, so its utility value will not decrease.

[Brief explanation of the drawing]

Figure 1 is a system diagram of an embodiment of the present invention, and Figure 2 is a diagram of each temperature w.
Figure 3 is a diagram for explaining the operation of the 14m meters 36 to 38 and the signal selection gain 32. Figure 3 is a diagram for explaining variable flow rate control of hot water. Figure 4 is a diagram showing the heat balance. A graph showing the operating range corresponding to hot water load and cold water load is displayed. l...21 effect absorption refrigerator, 2...evaporation gain, 3.
...Absorber, 4...Condenser, 5...High temperature regeneration profit, l
l...Cold water circulation circuit, 15...Air conditioner, 16...
Hot water circulation circuit, 20...Heater, 21...Flow rate control valve, 23...Temperature difference adjustment, 24.34...Temperature detection feeder 5f Ama Nishikyo Kei part Figure 3 Warm water ryoshu (0mu) Warm water plow circulation (0mu) lol! Figure 4 Figure 5 Cold water - shoulder ('/,)

Claims (1)

[Claims] Absorption type? A hot water circulation circuit that heats hot water using the absorber and crimper of the IIt refrigerator and supplies it to the hot water load, a test water circulation circuit that cools the cold water through evaporation and supplies it to the cold water load, and an absorption system that includes In the type cold/hot water machine, the FilJ warm water circuit is equipped with a flow rate control valve.
Temperature detection WLk by each fi1m detector for detecting the temperature at the inlet and outlet of the water load, respectively;
(a) A retractable hot and cold water tank, in which input is made to a temperature difference regulator controlled by the flow rate control valve TW so that the temperature difference therebetween becomes a preset value.