JP2008249302A - Heating medium supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating medium supply device capable of automatically closing a feed water cutoff valve of becoming an opening state, when the feed water cutoff valve becomes the opening state by a water hammer phenomenon. <P>SOLUTION: A valve operation control means 41 is arranged for performing water replenishing processing, by opening the feed water cutoff valve 31 corresponding to a heating medium storage tank T when a heating medium quantity in the heating medium storage tank T becomes a preset lower limit value, and by closing the feed water cutoff valve 31 when the meting medium quantity in the heating medium storage tank T becomes a preset upper limit quantity or more, based on detecting information of a heating medium quantity detecting means S detecting the heating medium quantity in the atmospheric opening type heating medium storage tank T in a plurality of respective heating medium circulating passages R. The valve operation control means 41 is constituted so as to perform abnormality releasing opening-closing processing for closing a valve by opening the feed water cutoff valve 31 corresponding to the heating medium storage tank T increased in a storage quantity, when discriminating that a heating medium storage quantity of the heating medium storage tank T being not an object of its water replenishing processing, is increased more than before performing its water replenishing processing, after performing the water replenishing processing based on the detecting information of the heating medium quantity detecting means S. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a heat medium supply device, and more specifically,
A plurality of heat medium circulation paths are provided via a heat medium heating section, a heat medium heat radiation section, and an air release type heat medium storage tank,
For each of the heat medium storage tanks in each of the plurality of heat medium circulation paths, a water supply pipe provided with an electromagnetically operated water supply intermittent valve that is elastically biased to the closed side is branched from a common source water supply pipe. Provided in a state,
Based on the detection information of the heat medium amount detecting means for detecting the amount of heat medium in the heat medium storage tank in each of the plurality of heat medium circulation paths, the amount of heat medium in the heat medium storage tank becomes the set lower limit amount. Then, the water supply intermittent valve corresponding to the heat medium storage tank is opened, and when the amount of the heat medium in the heat medium storage tank exceeds the set upper limit amount, water supply processing for closing the water supply intermittent valve is executed. The present invention relates to a heat medium supply device provided with valve operation control means.

Such a heat medium supply device is configured as, for example, a cogeneration system that combines a combined heat and power supply device and a heating device. That is, when a generator driving engine is provided as a combined heat and power supply device, an engine as a heat medium heating unit, a heat exchanger for heat transfer as a heat medium heat radiating unit, and an air release type heat medium storage tank are provided. A heat medium circulation path for recovering engine exhaust heat is formed, and a heat receiving heat exchanger as a heat medium heating part, a heating terminal as a heat medium heat radiating part, and an air release type heat medium storage tank are provided. A heating medium circulation path for heating is formed, and the heat medium is circulated in a heat transfer circulation path extending between the heat transfer heat exchanger and the heat reception heat exchanger, thereby By transferring the heat of the exchanger to the heat receiving heat exchanger, the exhaust heat of the engine is recovered and is radiated at the heating terminal. By the way, in the cogeneration system, a hot water storage tank to which tap water is supplied and a hot water supply path is connected in parallel with the heat receiving heat exchanger in the heat transfer circulation path is provided. In many cases, water is used as a heating medium in the road so that the exhaust heat of the engine can be stored in a hot water storage tank.
And by the water supply process of the valve operation control means, the heat medium amount of the heat medium storage tank in each heat medium circulation path is maintained between the set lower limit amount and the set upper limit amount. Water is supplied to the heat medium storage tank (see, for example, Patent Document 1).

JP 2005-241119 A

In order to replenish water to the heat medium storage tank in one of the plurality of heat medium circulation paths, the water supply intermittent valve corresponding to the heat medium storage tank is opened by the water replenishment process of the valve operation control means. When the valve is closed and then closed, the water hammer phenomenon that accompanies the closing causes the water supply intermittent valve corresponding to the other heat medium storage tank to open and the water supply tank to be unnecessarily supplied with water. May occur.
That is, as the water supply intermittent valve, an electromagnetically operated valve of a type in which a valve body elastically biased on the closing side is operated to open on the opening side with an electromagnetic solenoid is generally used. The elastically biased valve body is unnecessarily opened by water pressure due to a water hammer phenomenon, and there is a possibility that water is unnecessarily supplied to the heat medium storage tank.

  An example of the water supply intermittent valve will be described below. As shown in FIG. 7, a valve body 51 that opens and closes the flow path by contacting and separating from the valve seat 50 a of the valve case 50 is provided. A valve shaft 51a coupled to the valve case 50 is slidably supported by a support portion 50b of the valve case 50, and an operated portion 51b provided so as to move integrally with the valve shaft 51a is urged toward the closing side by a compression spring 52. In addition, the electromagnetic operation unit 53 is configured to be operated on the opening side. In addition, the valve body 51 is formed with a bypass flow path U that guides the feed water pressure to the back portion. When the valve body 51 is closed, the feed water pressure and the back pressure are balanced so It is supposed to be in a closed state. And in the water supply intermittent valve comprised in this way, when a water hammer phenomenon generate | occur | produced, although the mechanism cannot be clarified in detail, the valve body 51 might be in an open state. By the way, the water supply intermittent valve is not open when other water supply intermittent valves are switched from the open state to the closed state, and it depends on conditions such as the water supply pressure. It has been confirmed by experiments that it occurs at a frequency of about once every several thousand times.

  Incidentally, in the heat medium supply device, in general, a detection means for detecting an overflow of the heat medium storage tank, and an alarm means for alarming when an overflow is detected by the detection means, are provided. When unnecessary water supply to the heat medium storage tank is performed due to unnecessary opening of the valve, the overflow of the heat medium from the heat medium storage tank generated along with the water supply is detected by the above detection means, The alarm means will give an alarm. Therefore, the user closes the manual open / close valve provided in the main water supply pipe and requests maintenance from the management company or the like.

  The present invention has been made in view of such circumstances, and its purpose is to automatically close the water supply intermittent valve that is opened when the water supply intermittent valve is opened due to a water hammer phenomenon. An object of the present invention is to provide a heat medium supply device capable of performing the above.

The heat medium supply device of the present invention is provided with a plurality of heat medium circulation paths that pass through a heat medium heating section, a heat medium heat radiating section, and an air release type heat medium storage tank,
For each of the heat medium storage tanks in each of the plurality of heat medium circulation paths, a water supply pipe provided with an electromagnetically operated water supply intermittent valve that is elastically biased to the closed side is branched from a common source water supply pipe. Provided in a state,
Based on the detection information of the heat medium amount detecting means for detecting the amount of heat medium in the heat medium storage tank in each of the plurality of heat medium circulation paths, the amount of heat medium in the heat medium storage tank becomes the set lower limit amount. Then, the water supply intermittent valve corresponding to the heat medium storage tank is opened, and when the amount of the heat medium in the heat medium storage tank exceeds the set upper limit amount, water supply processing for closing the water supply intermittent valve is executed. Valve operation control means is provided,
The first characteristic configuration is
The valve operation control means is
After executing the water supply process based on the detection information of the heat medium amount detecting means, the heat medium storage amount of the heat medium storage tank that is not the target of the water supply process is before the water supply process is executed. When it is determined that the increase is also increased, an opening / closing process for canceling the abnormality is performed to open and close the water supply intermittent valve corresponding to the heat medium storage tank whose storage amount has increased.

  That is, when the valve operation control means determines that the amount of heat medium stored in the heat medium storage tank that is not the target of the water replenishment process increases after performing the water replenishment process than before the water replenishment process is performed. Water supply corresponding to the heat medium storage tank that is not the target of water replenishment processing by executing the opening / closing process for releasing the abnormality that opens and closes the water supply intermittent valve corresponding to the heat medium storage tank whose storage amount has increased The intermittent valve will be closed.

In addition, as a result of intensive studies by the inventors of the present invention, it has been found that the water supply intermittent valve that has been opened due to the water hammer phenomenon can be operated to the closed state by opening and closing the valve. It was.
Therefore, when the valve operating means determines that the amount of heat medium stored in the heat medium storage tank that is not the target of the water replenishment process increases after performing the water replenishment process than before performing the water replenishment process, Opening and closing the water supply intermittent valve corresponding to the heat medium storage tank whose storage volume has increased and closing it automatically closes the water supply intermittent valve that is unnecessarily opened. It can be manipulated to the state.
Therefore, when the water supply intermittent valve is opened due to the water hammer phenomenon, a heat medium supply device capable of automatically closing the water supply intermittent valve in the opened state has been provided. .

The second feature configuration of the heat medium supply device of the present invention has the same premise configuration as the first feature configuration,
Overflow detection means for detecting an overflow of the heat medium from the heat medium storage tank in each of the plurality of heat medium circulation paths is provided,
The valve operation control means is
After the water replenishment process is executed, when an overflow is detected by the overflow detection means, an abnormality that opens and closes the water supply intermittent valve corresponding to the heat medium storage tank that is not the target of the water replenishment process The opening / closing process for release is configured to be executed.

  That is, after the valve operation control means executes the water replenishment process, when an overflow is detected by the overflow detection means, the water supply intermittent valve corresponding to the heat medium storage tank not subject to the water replenishment process is opened. By executing the opening / closing process for releasing the abnormality that is closed by closing the valve, the water supply intermittent valve corresponding to the heat medium storage tank that is not the target of the water supply process is closed.

In addition, as a result of intensive studies by the inventors of the present invention, it has been found that the water supply intermittent valve that has been opened due to the water hammer phenomenon can be operated to the closed state by opening and closing the valve. It was.
Therefore, after the valve operating means performs the water supply process, when the overflow is detected by the overflow detection means, the water supply intermittent valve corresponding to the heat medium storage tank not subject to the water supply process is opened. Then, by executing the opening / closing process for canceling the abnormality that is closed, the water supply intermittent valve that is unnecessarily opened can be automatically operated to be closed.
Therefore, when the water supply intermittent valve is opened due to the water hammer phenomenon, a heat medium supply device capable of automatically closing the water supply intermittent valve in the opened state has been provided. .

In addition to the second feature configuration, the third feature configuration of the heat medium supply device of the present invention includes:
When an overflow is detected by the overflow detection means, an alarm control means for executing an alarm process for activating the alarm means is provided,
The valve operation control means is configured such that when the valve operation control means executes the water supply process, the alarm process is not executed even if an overflow is detected by the overflow detection means. .

That is, when an overflow is detected by the overflow detection means due to, for example, an external heat medium flowing into the heat medium circulation path due to a pipe line damage or the like in the heating medium heating section, the alarm control means executes an alarm process. The alarm operation of the alarm means notifies the user of the abnormality. However, when the valve operation control means executes the water replenishment process, even if an overflow is detected by the overflow detection means, the water supply intermittent valve is operated to be closed by the valve operation control means by the opening / closing process for canceling the abnormality. As a matter of course, the alarm means does not execute the alarm process.
Therefore, it is possible to provide a heat medium supply device that can be used conveniently while suppressing necessary alarms while performing necessary alarms.

[First Embodiment]
Hereinafter, based on drawings, a 1st embodiment at the time of applying a heat carrier supply device concerning the present invention to a cogeneration system is described.
As shown in FIG. 1, the cogeneration system recovers heat generated by the cogeneration apparatus 1 that generates electric power and heat, and the cogeneration apparatus 1 using cooling water, and uses the cooling water, It comprises a heating hot water storage unit 4 that stores hot water in the hot water storage tank 2 and a heating medium supply to the heating terminal 3, an operation control unit 5 that controls the operation of the combined heat and power supply device 1 and the heating hot water storage unit 4, and the like. Incidentally, as the heating terminal 3, a floor heating device, a bathroom heating dryer, a fan convector or the like is provided.
The cogeneration apparatus 1 includes a generator 1g and a gas engine 1e that drives the generator 1g.

On the power output side of the combined heat and power supply device 1, an inverter 6 for grid connection is provided, and the inverter 6 has the same voltage and the same as the received power that receives the generated power of the combined heat and power supply device 1 from the commercial power supply 7. It is configured to have a frequency.
The commercial power supply 7 is electrically connected to a power load 9 such as a television, a refrigerator, or a washing machine via a received power supply line 8.
Further, the inverter 6 is electrically connected to the received power supply line 8 via the generated power supply line 10, and the generated power of the cogeneration apparatus 1 is supplied to the power load 9 via the inverter 6 and the generated power supply line 10. Is configured to do.

The power supplied from the thermoelectric power supply device 1 to the received power supply line 8 is controlled by the inverter 6 so that a reverse power flow does not occur in the current flowing through the received power supply line 8, and the surplus power of the power generation output is the surplus power. Is supplied to an electric heater 11 that recovers instead of heat.
The electric heater 11 is composed of a plurality of electric heaters, and is configured to be switched ON / OFF separately by an operation switch 12 connected to the output side of the inverter 6.
And the said operation control part 5 is an operation switch in order to adjust the power consumption of the electric heater 11 according to the magnitude | size of surplus electric power, so that the power consumption of the electric heater 11 becomes large, so that the magnitude | size of surplus electric power becomes large. 12 is configured to be turned ON / OFF.

The engine that passes through the gas engine 1e, the heat exchanger 13 for heat transfer, and the open-side engine-side heat medium storage tank 14 in order to recover the exhaust heat of the gas engine 1e of the cogeneration apparatus 1 into cooling water. A heat medium circulation path 15 for exhaust heat recovery and a cooling water circulation pump 16 that circulates through the heat medium circulation path 15 for recovering engine exhaust heat using the cooling water that recovers exhaust heat of the gas engine 1e as a heat medium are provided. ing.
The electric heater 11 is provided so as to heat the cooling water flowing through the heat medium circulation path 15 for recovering the engine exhaust heat.

The heating and hot water storage unit 4 passes through the hot water storage tank 2 for storing hot water in a state where temperature stratification is formed, the heat receiving heat exchanger 17, the heating terminal 3, and the heating-side heat medium storage tank 18 that is open to the atmosphere. The heating medium circulation path 19 for heating, the heating medium circulation pump 20 for circulating the heating medium through the heating medium circulation path 19, and the heating medium circulation path 15 for recovering engine exhaust heat are provided. A heat transfer circuit 21 extending between the heat transfer heat exchanger 13 and the heat receiving heat exchanger 17 provided in the heating heat medium circuit 19, and heat for circulating hot water through the heat transfer circuit 21 A transfer circulation pump 22 and a burner combustion type auxiliary heater 23 for heating hot water flowing through the heat transfer circuit 21 are provided.
The heating medium circulation path 19 for heating is provided with a thermal valve 24 for intermittently supplying the heating medium to the heating terminal 3.

Connected to the heat transfer circuit 21 is a take-out path 25 communicating with the lower part of the hot water storage tank 2 and a hot water storage path 26 communicating with the upper part of the hot water storage tank 2. The hot water storage valve 27 is provided for adjusting the flow rate of hot water and interrupting the flow.
The heat transfer circulation pump 22 is provided in the heat transfer circulation path 21 so as to take out hot water from the lower part of the hot water storage tank 2 through the take-out path 25, and the heat transfer circulation path 21 includes the extraction path 25. The heat transfer heat exchanger 13 is provided on the upstream side of the heat transfer circulation pump 22 in the portion from the connection location to the connection location of the hot water storage passage 26 in the hot water flow direction. The auxiliary heater 23 is provided.
Further, a portion of the heat transfer circulation path 21 connected from the hot water storage path 26 to the connection position of the take-out path 25 in the flowing direction of the hot water is constituted by an electromagnetic proportional valve, and the flow rate of hot water is reduced. A heating valve 28 that performs adjustment and intermittent flow, and the heat-receiving heat exchanger 17 are provided.

Furthermore, a hot water supply passage 29 for supplying tap water is connected to the lower portion of the hot water storage tank 2, and a hot water supply passage 30 is connected to the upper portion of the hot water storage tank 2, and hot water is supplied from the hot water tank 2 through the hot water passage 30. The hot water supply destination such as a bathtub, a hot water tap, and a shower is sent out.
The hot water storage water supply passage 29 is connected to a main water supply pipe 33 connected to a water supply.

  In the heat transfer heat exchanger 13, heat is radiated from the cooling water flowing through the heat medium circulation path 15 for recovering engine exhaust heat to the hot water flowing through the heat transfer circulation path 21, and the heat transfer circulation is performed. The exhaust heat of the gas engine 1e of the combined heat and power supply device 1 is recovered in the hot water flowing through the passage 21, and in the heat receiving heat exchanger 17, the heating medium is heated from the hot water flowing through the heat transfer circulation passage 21. Heat is dissipated to the heat medium flowing through the circulation path 19, and the exhaust heat of the gas engine 1e is recovered to the heat medium flowing through the heating medium circulation path 19, so that the heating medium circulation path is heated. The heating terminal 3 is configured to radiate the exhaust heat of the gas engine 1e collected in the heat medium that flows through the heating device 19.

  The operation control unit 5 operates the cooling water circulation pump 16 during the operation of the combined heat and power supply apparatus 1, the heat transfer circulation pump 22, the heating heat medium circulation pump 20, the hot water storage valve 17, By controlling the operation of each of the heating valves 28, a hot water storage operation for storing hot water in the hot water storage tank 2 and a heat medium supply operation for supplying a heat medium to the heating terminal 3 are performed.

The operation control unit 5 performs the hot water storage operation in a state where no operation command is given from a terminal remote controller (not shown) for the heating terminal 3, and in the hot water storage operation, closes the heating valve 28, and The opening degree of the hot water storage valve 27 is adjusted so that the temperature of the hot water heated by the heat exchanger 13 for heat transfer becomes a set temperature in a state where the circulating pump 22 for transfer is operated. Yes.
Further, in the hot water storage operation, the operation control unit 5 determines that the temperature of the hot water heated by the heat transfer heat exchanger 13 is higher than the set temperature even if the opening of the hot water storage valve 27 is reduced to the set minimum opening. When the temperature is lower, the opening degree of the heating valve 28 is adjusted so that the temperature becomes the set temperature, and a part of the hot water heated by the heat exchanger 13 is bypassed in the hot water storage tank 2. It is comprised so that it may flow through.
Further, in the hot water storage operation, when the heating by the heat transfer heat exchanger 13 is insufficient to heat the hot water to the set temperature, the insufficient heat amount is supplemented by the auxiliary heater 23.

When the operation is instructed from the terminal remote controller, the operation control unit 5 performs the heat medium supply operation. In the heat medium supply operation, the heat transfer circulation pump 22 and the heating heat medium circulation pump 20 are operated. And the opening degree of the hot water storage valve 27 is adjusted so that the temperature of the hot water heated by the heat exchanger 13 is the set temperature in a state where the heating valve 28 is opened. It is configured.
Further, in the heat medium supply operation, even if the hot water storage valve 27 is closed, if the temperature of the hot water heated by the heat transfer heat exchanger 13 is lower than the set temperature, the supplied hot water is supplied. Thus, the auxiliary heater 23 is heated so as to be heated to the set temperature.

  The gas engine 1e of the combined heat and power supply device 1 corresponds to the heat medium heating unit H, the heat transfer heat exchanger 13 corresponds to the heat medium heat radiating unit E, and the engine side heat medium storage tank 14 is opened to the atmosphere. The heat-receiving heat exchanger 17 corresponds to the heat-medium heating unit H, the heating terminal 3 corresponds to the heat-medium heat radiation unit E, and the heating-side heat medium The storage tank 18 corresponds to an air release type heat medium storage tank T, and a plurality of heat mediums pass through the heat medium heating unit H, the heat medium heat radiating unit E, and the air release type heat medium storage tank T. As the circulation path R, a heat medium circulation path 15 for recovering engine exhaust heat and a heat medium circulation path 19 for heating are provided.

  As shown in FIGS. 1 and 2, the engine-side heat medium storage tank 14 in the heat medium circulation path 15 for recovering engine exhaust heat, and the heating-side heat medium storage tank 18 in the heating medium circulation path 19 are used. A water supply pipe 32 having an electromagnetically operated water supply intermittent valve 31 elastically biased to the closing side is provided in a state where it is branched from the common main water supply pipe 33, and the engine exhaust The amount of heat medium in the heat medium storage tank in each of the engine side heat medium storage tank 14 in the heat medium circulation path 15 for heat recovery and the heating side heat medium storage tank 18 in the heat medium circulation path 19 for heating. A heat medium amount detection sensor S is provided as a heat medium amount detection means for detecting.

  Although illustration is omitted, in order to shorten the piping path of the water supply pipe 32, the engine-side heat medium storage tank 14 and the heating-side heat medium storage tank 18 are brought close to a casing that houses the heating hot water storage unit 4. The water pressure due to the water hammer phenomenon that occurs when one water supply intermittent valve 31 is closed is easily applied to the other water supply intermittent valve 31.

  The water supply intermittent valve 31 provided for each of the engine-side heat medium storage tank 14 and the heating-side heat medium storage tank 18 will be described with reference to FIG. 7 in the section “Problems to be Solved by the Invention”. The configuration is the same as that described above. In the following description, the engine-side heat medium storage tank 14 may be referred to as the engine-side water supply intermittent valve 31e, and the heating-side heat medium storage tank 18 may be referred to as the heating-side water supply intermittent valve 31w. is there.

As shown in FIGS. 1 and 2, the heat medium amount detection sensors S provided in each of the engine side heat medium storage tank 14 and the heating side heat medium storage tank 18 have the same configuration, and the reference electrode 34, It comprises a lower limit electrode 35 that detects that the amount of heat medium has reached the set lower limit amount and an upper limit electrode 36 that detects that the amount of heat medium has reached the set upper limit amount. That is, it is configured to detect that the amount of the heat medium has reached the set lower limit amount or the set upper limit amount by the electric resistance between each of the lower limit electrode 35 and the upper limit electrode 36 and the reference electrode 34.
In the following description, the heat medium amount detection sensor S provided in the engine side heat medium storage tank 14 is referred to as an engine side heat medium amount detection sensor Se, and the heat medium provided in the heating side heat medium storage tank 18. The amount detection sensor S may be described as a heating-side heat medium amount detection sensor Sw.

Further, the engine side heat medium storage tank 14 is connected with an overflow pipe 38 that overflows the heat medium when the amount of the internal heat medium exceeds the set upper limit amount, and the heating side heat medium storage tank 14 18 is connected to an overflow pipe 39 that causes the heat medium to overflow when the amount of the heat medium inside exceeds the set upper limit.
Also, a heat medium recovery tank 37 is provided for recovering the overflowed heat medium through both overflow pipes 38, 39. The amount of the recovered heat medium inside the heat medium recovery tank 37 exceeds the set amount for alarm. An alarming heat medium amount detection sensor 40 for detecting this is provided.
This alarming heat medium amount detection sensor 40 is provided between the heat transfer heat exchanger 13 or the heat receiving heat exchanger 17 and the partition wall between the heat exchange flow paths through which the two fluids for heat exchange flow. Is provided to detect that a breakage has occurred.

  In other words, in the heat transfer heat exchanger 13, the heat exchange flow path for passing hot water from the heat transfer circuit 21 and the heat medium circuit 15 for recovering the engine exhaust heat are used. When a breakage that communicates between the flow paths occurs in the partition wall between the heat exchange flow path through which the cooling water flows, the hot water flowing through the heat transfer circulation path 21 to which the supply water pressure is applied is more preferable. Since the pressure is high, hot water flows from the heat transfer circuit 21 side to the engine exhaust heat recovery heat medium circuit 15 side, and is provided in the engine exhaust heat recovery heat medium circuit 15. Although the engine-side water supply intermittent valve 31e of the engine-side heat medium storage tank 14 is closed, the amount of the heat medium in the engine-side heat medium storage tank 14 increases and the heat medium recovery is performed through the overflow pipe 39. It will flow into the tank 37.

  Further, in the heat receiving heat exchanger 17, the heat exchange flow path for flowing hot water from the heat transfer circuit 21 and the heat for flowing the heat medium from the heating medium circulation path 19 are used. When the partition between the exchange channel and the communication channel is damaged, the hot water flowing through the heat transfer circuit 21 to which the feed water pressure is applied is at a higher pressure. Hot water flows out from the transfer circulation path 21 side to the heating heat medium circulation path 19 side, and the heating side water supply intermittent valve of the heating side heat medium storage tank 18 provided in the heating medium circulation path 19 is provided. Although the valve 31w is closed, the amount of the heat medium in the heating-side heat medium storage tank 18 increases and flows into the heat medium recovery tank 37 through the overflow pipe 39.

That is, when a communication abnormality that causes the heat exchange heat exchanger 13 or the heat receiving heat exchanger 17 to communicate between the heat exchange flow paths occurs, the amount of the heat medium in the heat medium recovery tank 37 increases. Abnormal communication with the heat transfer heat exchanger 13 or the heat receiving heat exchanger 17 based on the fact that the heat medium amount detection sensor 40 detects that the heat medium amount exceeds the alarm set amount. It is comprised so that it may detect that this occurred.
The remote control type operation unit 42 of this cogeneration system is provided with an alarm lamp 43 for notifying that a communication abnormality has occurred in the heat transfer heat exchanger 13 or the heat receiving heat exchanger 17. .

Next, a valve operation control process for controlling the operation of the plurality of water supply intermittent valves 31 so as to control the replenishment of water to each of the plurality of heat medium storage tanks 14 by the operation control unit 5 will be described.
Based on the detection information of the heat medium amount detection sensor S that detects the amount of heat medium in the heat medium storage tank T in each of the plurality of heat medium circulation paths R, the amount of heat medium in the heat medium storage tank T is determined. When the set lower limit amount is reached, the water supply intermittent valve 31 corresponding to the heat medium storage tank T is opened, and when the amount of heat medium in the heat medium storage tank T exceeds the set upper limit amount, the water supply intermittent valve 31 is opened. Valve operation control means 41 for executing water replenishment processing for closing the valve is provided.

That is, when the engine-side heat medium amount detection sensor Se detects that the heat medium amount is the set lower limit amount, the engine-side water supply intermittent valve 31e is opened, and after the opening, the engine-side heat medium amount detection sensor When it is detected by Se that the amount of the heat medium is the set upper limit amount, the engine side water supply intermittent valve 31e is closed, whereby the water supply process for the engine side heat medium storage tank 14 is executed.
When the heating-side heat medium amount detection sensor Sw detects that the heating medium amount is the set lower limit amount, the heating-side water supply intermittent valve 31w is opened, and after opening, the heating-side heat medium amount detection sensor When it is detected by Sw that the amount of the heat medium is the set upper limit amount, the heating-side water supply intermittent valve 31w is closed, whereby the water supply process is performed for the heating-side heat medium storage tank 18.
In this embodiment, the valve operation control means 41 is configured using the operation control unit 5.

And after this water replenishment process is performed based on the detection information of the heat medium amount detection sensor S, the operation control unit 5 stores the heat medium storage amount of the heat medium storage tank T that is not the target of the water replenishment process. Is determined to increase from before the water replenishment process is performed, the opening / closing process for canceling the abnormality is performed to open and close the water supply intermittent valve 31 corresponding to the heat medium storage tank T whose storage amount has increased. Is configured to do.
In the opening / closing process for canceling the abnormality, the operation control unit 5 opens the water supply intermittent valve 31 corresponding to the heat medium storage tank T whose storage amount has increased, and after the valve opening, the set time for canceling the abnormality The valve is configured to close after elapse of (for example, 1 second).

When the execution of the opening / closing process for canceling the abnormality is described, the operation control unit 5 detects the other heat medium amount when one of the two heat medium amount detection sensors S detects the set lower limit amount. After confirming the detection state of the sensor S, a water supply process is performed for the heat medium storage tank T corresponding to the heat medium amount detection sensor S that has detected the set lower limit amount, and the detection state of the other heat medium amount detection sensor S is detected. If the other heating medium amount detection sensor S detects the set upper limit amount until the set time for abnormality determination elapses after execution of the water replenishment process when the set upper limit amount is not detected, An abnormal condition opening / closing process is performed on the water supply intermittent valve 31 corresponding to the heat medium storage tank T provided with the heat medium amount detection sensor S that detects the set upper limit amount.
Incidentally, the set time for abnormality determination is set to about 1 minute, for example.

  That is, when the water supply process is executed for the heat medium storage tank T corresponding to the heat medium amount detection sensor S that has detected the set lower limit amount based on the detection of the set lower limit amount by the heat medium amount detection sensor S. In addition, the water supply intermittent valve 31 corresponding to the other heat medium storage tank T is opened due to the water hammer phenomenon, and the amount of the heat medium in the heat medium storage tank T increases to correspond to the heat medium storage tank T. When the set upper limit amount is detected by the heating medium amount detecting sensor S, the opening / closing process for canceling the abnormality is performed on the water supply intermittent valve 31 corresponding to the heat medium storage tank T, and the water supply intermittent valve 31 is It is automatically closed.

  The operation control unit 5 executes an alarm process for turning on the alarm lamp 43 when the alarm heat medium amount detection sensor 40 detects that the amount of the heat medium is an alarm set amount. It is configured.

Hereinafter, based on the flowchart shown in FIG. 3, the control operation in the valve operation control process of the operation control unit 5 will be described.
If it is determined in step # 1 that the heat medium amount detection sensor 40 detects that the heat medium amount is a set amount for alarm, and if it is determined that it is not detected, step # 1 2, it is determined whether or not the heating medium amount detection sensor Sw detects that the amount of the heating medium is a set lower limit amount. If it is determined that the amount is detected, the engine side heating medium amount detection sensor After confirming the detection state of Se, the water supply process is executed as described above for the heating-side heat medium storage tank 18, and when the water supply process is completed, the engine-side water supply intermittent valve 31e is unnecessarily opened. The engine side heat medium amount detection sensor Se detects that the heat medium amount is the set upper limit amount by the time when the timer is started and the set time for abnormality determination elapses. Then As down-side water supply intermittent valve 31e becomes unnecessarily opened state, its engine-side water supply intermittent valve 31e executes the opening and closing process for error recovery (step # 3-8).

  If it is determined in step # 2 that the heating medium amount detection sensor Sw does not detect that the heating medium amount is the set lower limit amount, and the processing in steps # 5, 6, and 8 is performed, After the water supply process for the medium storage tank 18 is executed, the engine-side heat medium amount detection sensor Se does not detect that the heat medium amount is the set upper limit amount even after the set time for abnormality determination has elapsed. In step # 9, it is determined whether or not it is detected by the engine-side heat medium amount detection sensor Se that the heat medium amount is the set lower limit amount. After confirming the detection state of the heat medium amount detection sensor Sw, the water supply process is performed on the engine side heat medium storage tank 14 as described above, and when the water supply process is completed, the heating side water supply intermittent valve 31w is unnecessary. In an open state When the timer is started to determine whether or not there is a set time for abnormality determination, the heating-side heat medium amount detection sensor Sw detects that the heat medium amount is a set upper limit amount. Then, assuming that the heating-side water supply intermittent valve 31w is unnecessarily opened, the heating-side water supply intermittent valve 31w is subjected to an opening / closing process for canceling the abnormality (steps # 10 to 15).

  If it is determined in step # 9 that the engine-side heat medium amount detection sensor Se does not detect that the heat medium amount is the set lower limit amount, and in the processing of steps # 12, 13, and 15, the engine After the water supply process for the side heat medium storage tank 14 is executed, the heating side heat medium amount detection sensor Sw newly detects that the heat medium amount is the set upper limit amount even when the set time for abnormality determination has elapsed. If not, return.

  If it is determined in step # 1 that the heat medium amount detection sensor 40 detects that the heat medium amount is the set amount for alarm, the alarm lamp 43 is turned on to execute alarm processing. Subsequently, a predetermined stop process is executed to stop the operation of the cogeneration system (steps # 16 and 17).

[Second Embodiment]
Hereinafter, based on the drawings, a second embodiment in the case where the heat medium supply device according to the present invention is applied to a cogeneration system will be described.
As shown in FIGS. 4 and 5, the cogeneration system according to the second embodiment includes an engine-side heat medium storage tank 14 in the heat medium circulation path 15 for recovering engine exhaust heat, and the heating medium. Each of the heating side heat medium storage tanks 18 in the circulation path 19 is provided with an overflow sensor 44 as an overflow detection means for detecting the overflow of the heat medium from the heat medium storage tank. Is different in that the alarm control means 45 for alarming the alarm means A is provided and the heat medium recovery tank 37 and the alarm heat medium amount detection sensor 40 are omitted. Since it is the same as that of said 1st Embodiment, the same code | symbol is attached | subjected about the same component as 1st Embodiment, or the component which has the same effect | action. Not described by mainly explaining a configuration different from that of the first embodiment.

  The overflow sensor 44 detects a state in which the amount of heat medium in the engine-side heat medium storage tank 14 or the heating-side heat medium storage tank 18 exceeds the set upper limit amount and overflows from the overflow pipe 37 or 38. It is provided to do.

  In the following description, the overflow sensor 44 corresponding to the engine-side heat medium storage tank 14 is referred to as an engine-side overflow sensor 44e, and the overflow sensor 44 corresponding to the heating-side heat medium storage tank 18 is referred to as heating. It may be described as a side overflow sensor 44w.

When a communication abnormality such as that described in the first embodiment occurs in the heat transfer heat exchanger 13, the heat transfer circuit 21 side moves to the engine exhaust heat recovery heat medium circuit 15 side. Although the hot water flows out and the engine side water supply intermittent valve 31e of the engine side heat medium storage tank 14 provided in the heat medium circulation path 15 for recovering the engine exhaust heat is closed, the engine side Since the amount of the heat medium in the heat medium storage tank 14 increases, an overflow is detected by the engine side overflow sensor 44e.
Further, when a communication abnormality as described in the first embodiment occurs in the heat receiving heat exchanger 17, hot water flows out from the heat transfer circuit 21 side to the heating heat medium circuit 19 side. Therefore, the heat of the heating-side heat medium storage tank 18 is closed even though the heating-side water supply intermittent valve 31w of the heating-side heat medium storage tank 18 provided in the heating medium circulation path 19 is closed. Since the amount of the medium increases, the heating side overflow sensor 44w detects an overflow.

In the second embodiment, the alarm control means 45 is configured using the operation control unit 5.
Then, the alarm means A is configured by the alarm lamp 43, and the alarm lamp 43 is turned on to execute alarm processing for operating the alarm means A.
In the second embodiment, as the alarm lamp 43, an alarm lamp 43e for notifying the heat exchanger heat exchanger abnormality and an alarm lamp 43w for notifying the heat exchanger abnormality of heat receiving are provided.
When the engine-side overflow sensor 44e detects an overflow, the operation control unit 5 executes an alarm process for turning on the alarm lamp 43e for notifying the heat exchanger heat exchanger abnormality, and the heating side When an overflow is detected by the overflow sensor 44w, an alarm process for turning on the alarm lamp 43w for notifying the heat receiving heat exchanger abnormality is executed.

Next, a valve operation control process for controlling the operation of the plurality of water supply intermittent valves 31 so as to control the replenishment of water to each of the plurality of heat medium storage tanks 14 by the operation control unit 5 will be described.
Also in the second embodiment, similarly to the first embodiment, the detection information of the heat medium amount detection sensor S that detects the amount of the heat medium in the heat medium storage tank T in each of the plurality of heat medium circulation paths R. When the amount of the heat medium in the heat medium storage tank T reaches the set lower limit amount, the water supply intermittent valve 31 corresponding to the heat medium storage tank T is opened, and the heat medium storage tank T When the amount of the heat medium exceeds the set upper limit amount, valve operation control means 41 for performing water supply processing for closing the water supply intermittent valve 31 is provided, and the valve operation control means 41 uses the operation control unit 5. It is configured.

  And in this 2nd Embodiment, after the said operation control part 5 performs the said water replenishment process, when the overflow is detected by the said overflow detection sensor 44, the said heat which is not the object of the water replenishment process. An opening / closing process for canceling the abnormality for opening and closing the water supply intermittent valve 31 corresponding to the medium storage tank is executed.

The operation control unit 5 will detect the set lower limit amount when one of the two heat medium detection sensors S detects the set lower limit amount. The heat medium storage tank T corresponding to the heat medium amount detection sensor S is subjected to water supply processing, and after the water supply processing is performed, until the set time for abnormality determination elapses, the other heat medium amount detection sensor When an overflow is detected by the overflow sensor 44 corresponding to the heat medium storage tank T provided with S, the water supply intermittent valve corresponding to the heat medium storage tank T provided with the overflow sensor 44 detecting the overflow An opening / closing process for canceling the abnormality 31 is executed.
Incidentally, the set time for abnormality determination is set to about 1 minute, for example.

  That is, when the water supply process is executed for the heat medium storage tank T corresponding to the heat medium amount detection sensor S that has detected the set lower limit amount based on the detection of the set lower limit amount by the heat medium amount detection sensor S. In addition, the water supply intermittent valve 31 corresponding to the other heat medium storage tank T is opened due to the water hammer phenomenon, and the amount of the heat medium in the heat medium storage tank T increases to correspond to the heat medium storage tank T. When an overflow is detected by the overflow sensor 44, the opening / closing process for canceling the abnormality is performed on the water supply intermittent valve 31 corresponding to the heat medium storage tank T, and the water supply intermittent valve 31 is automatically closed. Is done.

  Further, when the water replenishment process is executed, the operation control unit 5 is configured not to execute an alarm process for turning on the alarm lamp 43 even if an overflow is detected by the overflow sensor 44.

Hereinafter, based on the flowchart shown in FIG. 6, the control operation in the valve operation control process of the operation control unit 5 will be described.
In step # 31, it is determined whether or not an overflow is detected by the heating side overflow sensor 44w. If it is determined that the overflow is not detected, an overflow is detected by the engine side overflow sensor 44e in step # 32. If it is determined that the heat medium amount is not detected, it is determined in step # 33 that the heating medium amount detection sensor Sw detects that the heat medium amount is the set lower limit amount. If the water supply process is performed for the heating-side heat medium storage tank 18 as described above and the water supply process is completed, the engine-side water supply intermittent valve 31e is turned off. Start the timer to determine whether it is in the open state, and the engine side will be overrun until the set time for abnormality determination elapses. If an overflow is detected by the flow sensor 44e, the engine-side water supply intermittent valve 31e is unnecessarily opened, and the engine-side water supply intermittent valve 31e is subjected to an opening / closing process for canceling the abnormality (step # 34). ~ 38).

  If it is determined in step # 33 that the heating medium amount detection sensor Sw does not detect that the heating medium amount is the set lower limit amount, and in the processing of steps # 35, 36, and 38, the heating side heat is detected. If no overflow is detected by the engine-side overflow sensor 44e even after a set time for abnormality determination has elapsed after the water supply process for the medium storage tank 18 has been performed, in step # 39, the engine-side heat medium amount It is determined whether or not the amount of the heat medium is detected to be the set lower limit amount by the detection sensor Se. If it is determined that the amount is detected, the water supply process is performed on the engine-side heat medium storage tank 14 as described above. When the water supply process is completed, a timer is started to determine whether the heating-side water supply intermittent valve 31w is unnecessarily opened. If the heating-side overflow sensor 44w detects an overflow before the set time for the operation has elapsed, the heating-side water supply intermittent valve 31w is abnormally assumed to have opened unnecessarily. A release opening / closing process is executed (steps # 40 to # 44).

  If it is determined in step # 39 that the engine-side heat medium amount detection sensor Se has not detected that the heat medium amount is the set lower limit amount, and in the processing of steps # 41, 42, and 44, the engine If the heating-side overflow sensor 44w does not detect an overflow after the water replenishment processing for the side heat medium storage tank 14 is executed, the process returns.

  If it is determined in step # 31 that the heating-side overflow sensor 44w has detected an overflow, the alarm lamp 43w for notifying the heat receiving heat exchanger abnormality is turned on to execute an alarm process, Is stopped to stop the operation of the cogeneration system (steps # 45 and 47). When it is determined in step # 32 that the engine-side overflow sensor 44e has detected an overflow, the heat transfer The alarm lamp 43e for notifying the heat exchanger abnormality is turned on to execute an alarm process, and then a predetermined stop process is executed to stop the operation of the cogeneration system (steps # 46 and 47).

[Another embodiment]
Next, another embodiment will be described.
(Ii) In providing a plurality of heat medium circulation paths R that pass through the heat medium heating section H, the heat medium heat radiation section E, and the open air type heat medium storage tank T, the number of the heat medium circulation paths R illustrated in the above embodiments 2 The number is not limited to three and may be three or more.
The types of the heat medium circulation path R are the types exemplified in the above embodiments, that is, the gas engine 1e as the heat medium heating unit H, the heat exchanger 13 for heat transfer as the heat medium heat radiating unit E, and the atmosphere. A heat medium circulation path 15 for recovering engine exhaust heat via an engine side heat medium storage tank 14 as an open type heat medium storage tank T, a heat receiving heat exchanger 17 as a heat medium heating section H, a heat medium It is not limited to the heating medium circulation path 19 via the heating terminal 3 as the heat radiating part E and the heating side heat medium storage tank 18 as the air release type heat medium storage tank T.
For example, when a fuel cell is provided as a combined heat and power supply device, in order to recover the exhaust heat of the fuel cell 1, a fuel cell as the heating medium heating unit H, a heat exchanger for heat transfer as the heating medium heat dissipation unit E, and the atmosphere A heat medium circulation path for recovering exhaust heat from the fuel cell via the fuel cell side heat medium storage tank as the open type heat medium storage tank T is provided.
Moreover, you may provide multiple types as a heating-medium circulation path for heating by varying the kind of heating terminal as the heat-medium heat radiation part E. As shown in FIG.

(B) The specific configuration of the alarm means is not limited to the alarm lamp 43 exemplified in each of the above embodiments, but may be a buzzer, a display, or the like, or two of the alarm lamp 43, the buzzer and the display. A combination of two or more may be used.

(C) The heat medium amount detection means is not limited to one that detects the heat medium amount in a stepwise manner as exemplified in each of the above embodiments. For example, the heat medium amount is detected continuously. It may be configured as follows. In this case, in the first embodiment, the operation control unit 5 performs the water supply process based on the detection information of the heat medium amount detection sensor S, and then stores the heat medium that is not the target of the water supply process. When it is determined that the heat medium storage amount of the tank T is increased by the abnormality determination set amount than before the water replenishment process is executed, the water supply intermittently corresponding to the heat medium storage tank T whose storage amount is increased by the abnormality determination set amount An opening / closing process for canceling the abnormality for opening and closing the valve 31 is executed.

(D) The electromagnetically operated water supply intermittent valve elastically biased to the closing side is not limited to the structure illustrated in the above embodiment, but various structures elastically biased to the closing side It is possible to use a solenoid valve.

(E) The present invention is not limited to the application to the cogeneration system as an example of the heat medium supply device as in the above embodiment, and the heat medium heating unit H, the heat medium heat dissipation unit E, and The present invention can be applied to a heat medium supply device having various configurations provided with a plurality of heat medium circulation paths R that pass through an air release type heat medium storage tank T.
For example, a heat exchanger for heat transfer as the heat medium heating unit H, a heating terminal as the heat medium heat radiating unit E, and a plurality of heating medium circulation paths R for heating via an air release type heat medium storage tank T, The present invention can be applied to a heat medium supply device provided in a form in which a heat medium heated by a common heating means such as a burner combustion type is passed through the heat transfer heat exchanger.

Block diagram of a cogeneration system according to the first embodiment The block diagram which shows the structure around the heat-medium storage tank which concerns on 1st Embodiment, and the control structure of valve operation control processing The figure which shows the flowchart of control action of the valve operation control process which concerns on 1st Embodiment. Block diagram of a cogeneration system according to the second embodiment The block diagram which shows the structure around the heat-medium storage tank which concerns on 2nd Embodiment, and the control structure of valve operation control processing The figure which shows the flowchart of control operation | movement of the valve operation control process which concerns on 2nd Embodiment. Partial cutaway view of water supply intermittent valve

Explanation of symbols

31 Water supply intermittent valve 32 Water supply pipe 33 Original water supply pipe 41 Valve operation control means 44 Overflow detection means 45 Alarm control means A Alarm means E Heat medium heat radiation part H Heat medium heating part R Heat medium circulation path S Heat medium amount detection means T Heat Medium storage tank

Claims (3)

A plurality of heat medium circulation paths are provided via a heat medium heating section, a heat medium heat radiation section, and an air release type heat medium storage tank,
For each of the heat medium storage tanks in each of the plurality of heat medium circulation paths, a water supply pipe provided with an electromagnetically operated water supply intermittent valve that is elastically biased to the closed side is branched from a common source water supply pipe. Provided in a state,
Based on the detection information of the heat medium amount detecting means for detecting the amount of heat medium in the heat medium storage tank in each of the plurality of heat medium circulation paths, the amount of heat medium in the heat medium storage tank becomes the set lower limit amount. Then, the water supply intermittent valve corresponding to the heat medium storage tank is opened, and when the amount of the heat medium in the heat medium storage tank exceeds the set upper limit amount, water supply processing for closing the water supply intermittent valve is executed. A heating medium supply device provided with valve operation control means for
The valve operation control means is
After executing the water supply process based on the detection information of the heat medium amount detecting means, the heat medium storage amount of the heat medium storage tank that is not the target of the water supply process is before the water supply process is executed. A heating medium supply device configured to execute an opening / closing process for canceling an abnormality that opens and closes the water supply intermittent valve corresponding to the heat medium storage tank whose storage amount has increased. A plurality of heat medium circulation paths are provided via a heat medium heating section, a heat medium heat radiation section, and an air release type heat medium storage tank,
For each of the heat medium storage tanks in each of the plurality of heat medium circulation paths, a water supply pipe provided with an electromagnetically operated water supply intermittent valve that is elastically biased to the closed side is branched from a common source water supply pipe. Provided in a state,
Based on the detection information of the heat medium amount detecting means for detecting the amount of heat medium in the heat medium storage tank in each of the plurality of heat medium circulation paths, the amount of heat medium in the heat medium storage tank becomes the set lower limit amount. Then, the water supply intermittent valve corresponding to the heat medium storage tank is opened, and when the amount of the heat medium in the heat medium storage tank exceeds the set upper limit amount, water supply processing for closing the water supply intermittent valve is executed. A heating medium supply device provided with valve operation control means for
Overflow detection means for detecting an overflow of the heat medium from the heat medium storage tank in each of the plurality of heat medium circulation paths is provided,
The valve operation control means is
After the water replenishment process is executed, when an overflow is detected by the overflow detection means, an abnormality that opens and closes the water supply intermittent valve corresponding to the heat medium storage tank that is not the target of the water replenishment process A heating medium supply device configured to execute an opening / closing process for release. When an overflow is detected by the overflow detection means, an alarm control means for executing an alarm process for activating the alarm means is provided,
3. The alarm control unit is configured so that when the valve operation control unit executes the water supply process, the alarm process is not executed even if an overflow is detected by the overflow detection unit. Heat medium supply device.

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