JPH03251651A - Hot water producing device - Google Patents

Abstract

PURPOSE:To make it possible to produce hot water with high thermal efficiency without an electric power supplying element by providing a Stirling engine, a combustion device supplying heat to a heater thereof, a heat exchanger element provided in a cooler of the engine, a water circulation channel connected to this element, and a pump means. CONSTITUTION:When a Stirling engine 19 is started with a combustion device 13a operated, a medium enclosed in a space 30 of a high temperature part and a space 31 of a low temperature part in a cylinder 20 is made to expand and contract repeatedly and thereby a displacer and a power piston 24 and 25 (of a piston element) are put in reciprocation. At this time, the pulsation of a pressure generated in the engine 19 is given to a check valve and diaphragms 16a, 41 and 42 (of a pump element) and thereby the pump element is operated. Thereby a liquid to be heated is sent to a heat exchanger 32 (of a cooler) for cooling of the engine 19 from a water source through a circulation channel 16 and heated by the heat of the engine 19 radiated therefrom. Then, necessary hot water is let out continuously from the outlet side of the heat exchanger 32.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a hot water generating device for a water heater, a water heater, a shower, or a bath, which is constructed using a Stirling engine.

(Prior Art) In recent years, a simple electric heating type hot water generating device has been used as a simple method for washing hair. This electric hot water generator is also attracting attention as a snow removal method in areas with heavy snowfall.

By the way, this type of hot water generator requires the use of an electric heater with relatively high output. Moreover, since the purpose is to supply hot water, it is necessary to use a separate electric pump if water supply pressure cannot be obtained.

(Problems to be Solved by the Invention) However, the above-mentioned electrothermal hot water generator inevitably requires a power supply section for operating the electric heater, electric pump, and the like.

Therefore, there is a drawback that it cannot be used in places where there is no power supply nearby. Such problems also apply to hot water generating devices for other uses such as water heaters, water heaters, baths, and the like.

Moreover, hot air generators using electric heaters do not have very good thermal efficiency calculated from negative energy. In addition, it consumes a lot of electrical energy because it requires relatively high-output electric heaters and electric pumps, so it may be necessary to change the contract with the electric company when using a hot air generator, or it may be necessary to In the case of households, measures to secure power, such as increasing the amperage of the power source used, have been forced.

This invention was made in view of the above circumstances, and its purpose is to provide a hot water generator that can generate hot water with high thermal efficiency even without a power supply section.

[Structure of the Invention (Means for Solving the Problems)] In order to achieve the above object, the present invention provides a piston part that constitutes a high temperature part space and a low temperature part space in a cylinder, and also provides a piston part that constitutes a high temperature part space and a low temperature part space. a Stirling engine configured by connecting a heater, a heat storage device, and a cooler between the stirling engine and a low-temperature part space; a combustion device that supplies heat to the heater to drive the stirling engine; and at least the cooler of the stirling engine. a heat exchanger section provided in the cooler to exchange heat with the heat generated in the cooler; a flow path connected to this heat exchanger section for circulating water to the heat exchanger section; The hot water generating apparatus is constructed by providing a pump means that operates using the pressure pulsations generated by the Stirling engine as a driving source to send water to the hot water generating apparatus.

(Function) According to the hot water generator of the present invention, when the combustion device is combusted and the Stirling engine is started, the enclosed medium enclosed in the high-temperature part space and the low-temperature part space in the cylinder repeats expansion and compression. The piston part is moved back and forth. At this time, the pressure pulsations generated by the Stirling engine are applied to the pump means to operate the pump means.

As a result, the heated liquid is sent from the water source through the flow path to the heat exchanger section in the cooler of the Stirling engine, where it is heated by the heat of the Stirling engine radiated from the cooler. Then, the necessary hot water is continuously discharged from the outlet side of the heat exchanger section.

However, the necessary hot water can be obtained without requiring a power supply. In addition, since the liquid to be heated is heated using combustion heat which reaches a considerably high temperature, it is more efficient than one using an electric heater.

(Example) The present invention will be described below based on a first example shown in FIG. FIG. 1 shows a hot water generating device, for example, a hot water heater to which the present invention is applied, and 10 is the main body of the water heater. The main body 10 is composed of, for example, a vertically elongated sealed container partitioned at the center in the vertical direction by a partition portion 11.

The space above the partition 11 is used as a reservoir 12 for storing water, and the space below is used as a combustion chamber 13. At the bottom of the combustion chamber 13, a combustor 13a is connected to a fuel chamber 13b (fuel storage section) such as a cylinder installed outside that stores fuel such as liquid butane, LPG, kerosene, etc.
(equivalent to a combustion device) is installed. In addition, combustor 1
3a is provided with a piezoelectric or battery type ignition plug as an ignition device, although not shown.

In addition, an intake port 14 is provided at the lower part of the peripheral wall constituting the storage section 12.
is provided. Further, a water outlet 15 is provided in the upper part of the peripheral wall. The intake port 14 has an intake passage 16 (corresponding to a flow passage) interposed with a check valve 16a that allows the inflow direction.
is connected.

The tip of this intake path 16 is placed inside a container 17 or the like in which water is stored. Note that 18 is a filter provided at the tip of the intake path 16 to remove dirt and the like contained in the water.

On the other hand, 19 is a Stirling engine, for example a displacer type Stirling engine.

To explain the Stirling engine 19, 20 is a cylindrical cylinder with a bottom. A coaxial cylindrical cam 21 is rotatably provided on the open side of the cylinder 20. The cylindrical cam 21 has a cam groove 22 formed in the outer peripheral surface thereof, for example, a sine curve having two peaks and a valley. Then, cam followers 23 and 23 are rotatably installed at points with a certain phase difference in the cam groove 22, for example, two points having a phase difference of r90''J. A displacer 24 and a power piston 25 (both correspond to piston portions) are provided in order from the side so as to be able to reciprocate at predetermined intervals. For example, the power piston 25 is connected to a cam lever 27 provided on the cam follower 23 on the advancing side.
8 to the other cam follower 23, a high temperature space 30 is formed between the head of the displacer 24 and the opposite bottom wall of the cylinder 20, and the power piston A low temperature space 31 is formed between the head of the displacer 25 and the bottom of the displacer 24 facing thereto. Note that the rod 26 passes through the power piston 25 in a slidable manner. Further, a cooling heat exchanger 32 (cooler), a regenerator 33, and a heating heat exchanger 34 are connected in this order so that the high temperature part space 30 and the low temperature part space 31 are communicated with each other. The airtight working space constituted by the high temperature section space 30, the heating heat exchanger 34, the regenerator 33, the cooling heat exchanger 32, and the low temperature section space 31 is filled with a working gas (
For example, a working fluid such as helium or air is sealed. In addition, 35 is a working gas filling port connected to the cylinder wall and communicates with the working space, 36m is a filling path connected to the working gas filling port 35, 36 is a check valve for preventing backflow provided in the filling path 35, and 37 is a discharge passage connected in parallel to the filling passage 36; 38 is an on-off valve provided in the discharge passage 37; and 39 is for starting the Stirling engine 19 connected in parallel to the filling passage 36 via an on-off valve 40. starting device, such as a manual (or battery-operated) pump.

However, 40a is a relief hole provided in, for example, the axial center portion of the cylindrical cam 21 to release back pressure generated at the back of the power piston 25 to the open end side of the cylinder 20.

The main body of the Stirling engine 19 is housed in the main body 1 at a predetermined position, with the regenerator 33 and the cooling heat exchanger 32 interposed therebetween.

That is, the Stirling engine 19
3 and the cooling heat exchanger 32 are separated by the partition 11, and the bottom side of the cylinder 20 including the heating heat exchanger 34 is connected to the combustion chamber 13.
The open side of the cylinder 20 including the regenerator 33 and the cooling heat exchanger 32 is placed inside the reservoir 12 .

This allows the high temperature side of the cylinder 20 to be connected to the combustor 13a.
When heated by combustion heat, the working gas moves while periodically heating and cooling, causing the displacer 24 and the power piston 25 to reciprocate, and the circular and cylindrical cams 21 to rotate. Therefore, due to the reciprocating movement of the displacer 24 and the power piston 25,
The working gas is compressed in the low temperature part space 31, and the working gas is compressed in the high temperature part space 3o.
Expand the working gas within. In addition, by using the storage section 12 as a heat exchanger section, heat generated in the cooling heat exchanger 32 is transferred to the storage section 12.
This allows heat to be dissipated to the water inside.

Further, a diaphragm 41 is provided at the open end of the cylinder 20 so as to airtightly close the entire opening of the cylinder 20 without any gaps. However, 41a indicates a fixing ring for fixing the diaphragm 41 to the cylinder end.

As a result, the diaphragm 41 moves up and down as shown by the solid line and the two-dot chain line in FIG. It is designed to be displaced in the direction. In addition, an intermediate pipe 43 is connected to the water outlet 15 and is equipped with a check valve 42 that allows the water to flow in the outflow direction. The water can flow out to the outside, and the water can be pumped up from inside the container 17 into the storage part 12. In other words, water can be made to flow into the storage section 12, which serves as a heat exchange path, using the pressure pulsations generated by the Stirling engine 19 as a driving source (pump section).

On the other hand, 44 is a waste heat heat exchanger provided around the cylinder 20, for example, around the regenerator 33 near the heating heat exchanger 34.
It consists of a spiral vibrator that wraps around 0. One end of the waste heat heat exchanger 44 is connected to a flexible vibrator 45 that is attached to the end of the intermediate pipe 43 and is vertically movable. The other end of the waste heat heat exchanger 44 is connected to a water outlet faucet 46 via a flexible vibe 48 that can be expanded and contracted in the vertical direction and an outlet channel 47. As a result, Stirling engine 1
The water heated on the cooler side of No. 9 is heated again by exhaust heat of combustion gas emitted from the combustor 13a and further by heat loss from the mechanical parts such as radiant heat. Further, a hot water temperature adjustment lever 49 provided on the peripheral wall of the combustion chamber 13 so as to be slidable in the vertical direction is connected to the heat exchanger 44 for waste heat, and as the adjustment lever 49 is slid in the vertical direction, the waste heat is The heat exchanger 44 can be moved toward and away from the combustor 13a. Then, by sliding the waste heat heat exchanger 44, the amount of heat absorbed by the hot water flowing from the combustor 13a through the waste heat heat exchanger 44 is varied, and the temperature of the hot water coming out from the water outlet faucet 46 is changed. I'm trying to do that.

Note that 50 is a combustion gas exhaust pipe connected to the peripheral wall of the combustion chamber 12. This combustion gas exhaust pipe 50 is connected to the combustor 13a.
In order that the combustion gas generated from
(Only one location is shown in the drawing).

Next, the operation of the hot water heater configured as described above will be explained.

First, fuel in the cylinder 13b is supplied to the combustor 13, and the combustor 13 is ignited using the ignition plug.

As a result, the fuel is burned in the combustor 13, and combustion heat is added to the heating heat exchanger 34 of the Stirling engine 19. Next, from this state, the operator slides the operating portion of the manual pump 39 of the starting device to apply a pulsating flow of pressure to the working gas sealed in the Stirling engine 19. As a result, the displacer 24. As the power piston 25 reciprocates, the cylindrical cam 21 rotates in accordance with the reciprocating movement.

Then, according to the movement, the working gas in the working space receives the combustion heat and moves to a high temperature in the heating heat exchanger 34 and is cooled in the cooling heat exchanger 32, and the Stirling engine 19 is started. In other words, a Stirling cycle occurs in which a process in which the heated high-temperature working gas enters the high-temperature space 30 of the cylinder 20 and expands, and a process in which the working gas is compressed in the low-temperature space 31 are repeated. As a result, the cooling heat exchanger 32 of the Stirling engine 19
From there, the heat is radiated to the water in the storage section 12.

On the other hand, due to the pressure pulsations generated on the cylinder opening side due to the reciprocating motion of the power piston 25, the diaphragm 41 is periodically displaced in the vertical direction, and the reservoir 12
The internal pressure of the system is changed periodically.

If you open the water faucet 46 in this state, the check valve 16
a, 42 are opened and closed in accordance with the pulsation of the pressure, water is drawn up from the container 17 to the reservoir 12, and hot water comes out from the water faucet 46.

Specifically, as the water pumped into the reservoir 12 flows around the cylinder 20 toward the water outlet 15, it is heated by the heat loss of the Stirling engine 19. Next, the hot water coming out of the water outlet 15 passes through the intermediate bypass 143, and when passing through the waste heat heat exchanger 44, the heat of the high temperature combustion gas of the combustor 13a, the high temperature part around the combustor 13g, Furthermore, it is heated by conductive heat and radiant heat from the high temperature portion of the cylinder 20. The water heated by this two-step heat exchange process then flows out from the water faucet 46. In addition, if it is desired to raise the temperature of the hot water at this time, the hot water temperature adjustment lever 49 may be slid downward to move the waste heat heat exchanger 44 closer to the combustor 13a side. Moreover, when it is desired to lower the temperature of the hot water, the lever 49 can be slid upwardly to separate the waste heat heat exchanger 44 from the combustor 13a side.

Therefore, hot water can be obtained without the need for a power supply (cordless).

In addition, by adopting a heating structure that effectively utilizes waste heat (heat of combustion gas) from the waste heat heat exchanger 44, the cooling heat exchanger 3
The efficiency is better than when heating water with only 2. Moreover,
With the structure in which the height of the waste heat heat exchanger 44 is changed using the hot water temperature adjustment lever 49, the hot water temperature can be easily raised or lowered without controlling the combustion amount of the combustor 13a or the like.

In addition, the check valves 16g and 42 function not only as pumps but also as regulators, so that the pressure of the supplied hot water is always constant despite the simple structure.

Furthermore, since it is an efficient device that heats water using combustion heat that reaches extremely high temperatures, it is smaller and lighter than conventional devices that use electric heaters and electric pumps.

To explain this point, the current pneumatic Stirling engine has a shaft output/engine weight value of approximately 100 W.
/kgJ, it is expected that 300 to 400 W/kgJ will be realized in the future. At this time, a thermal efficiency of about 10 to 20% will be obtained.

Here, the "export power/
If the value of "engine weight" is r100W/kgJ and its thermal efficiency is "10%", and the pump power is r40WJ, the engine weight is "40W ÷ 100W - 0.4kgJ.The heat input of the engine is r4010. It becomes 10-400WJ.

From this, the amount of heat released from the engine and usable as hot water is the value obtained by subtracting the "shaft output 40W" from the heat input r400WJ of the engine, that is, r360WJ. This heat and combustion heat then become part of the heat source of the hot water.

On the other hand, if we calculate the amount of water pumped, the "bore x stroke" of the experimental Starrig engine is; 2cm (r) x 2cm (
r)Xπx 1.2csn (H) = 15 (ec)
Here, assuming that the piston part reciprocates at 1500 rpm; 15 (ee) x 1500 (rpm) Assuming that the output is r40WJ, the pumping head is about 3 to 4 mJ for water supply and about 6 to 8 mJ for water absorption.

If we apply the equivalent to a conventional hot water water heater, the heater output is r500W to 1000W, the pump motor is r40WJ, and the equipment weight including the power cord is rlo.
A hot water heater with a system of kgJ is selected.

However, it is found to be more efficient than conventional hot water water heaters using electric heaters and electric pumps.

Comparing the weights at this time, the Stirling engine, which has the same system as a conventional hot water tank with a 20g tank, has an engine weight of 400gJ, liquid butane fuel of r200gJ (about 3 to 4 hours of combustion), and a hot water Even if the weight of the part corresponding to the main body of the water heater is r5400gJ, it will be approximately 6kgJ, which is the weight of the conventional hot water water heater "10
It is lighter and smaller at approximately 3.4 kgJ than ``kg''.Especially,
If a displacer system is adopted for the Stirling engine 19 as in this embodiment, the configuration is simple and the engine becomes smaller and lighter.

Further, since the Stirling engine 19 is an external combustion engine with better exhaust gas characteristics than an internal combustion engine, the degree of pollution of the outside air is low. Moreover, unlike internal combustion engines, there is no sudden explosion or compression process, so it has the advantage of being superior in terms of noise and vibration.

In addition, in the first embodiment described above, a pump part having a structure in which a diaphragm is incorporated into a cylinder is adopted, but the structure is not limited to this, and for example, the second embodiment shown in FIG. 2 and the pump part shown in FIG. A pump section like that of the third embodiment may be employed.

That is, in the second embodiment, the pump section is placed separately from the main body of the hot water water heater.

Specifically, for example, in a box-shaped valve body 63 that has an inlet part 60 and an outlet part 61 on the - side, and a pulsation socket 62 on the opposite side, there is a pulsation socket on the 60° 61 side and the pulsation socket on the opposite side. A diaphragm 64 is provided to partition the intake passage 66 from the inlet 62 side to constitute a driving part, and a check valve 65 is interposed in the inlet part 60.
Connect. Further, the outlet portion 61 and the intake port 14 are connected by an introduction path 68 having a check valve 67 interposed therebetween. Furthermore, cylinder 2
The open end of 0 is closed with the lid part 20b. The pulsation receiving port 62 is connected to a pulsating receiving passage 69 that communicates with the space 20a on the open end side of the cylinder 20, and the pressure introduced into the valve body 63 through the pulsating receiving passage 69 is controlled. Using pulsation, water is made to flow within the reservoir 12, as in the first embodiment.

Note that the pulsations that cause the pump function to be generated are not generated in the space 20a of the cylinder 20, but as shown by the two-dot chain line in FIG. 63, and the diaphragm 64 may be driven by the pulsation.

The third embodiment is a modification of the second embodiment, in which a water-incompatible liquid 72 is inserted into the valve body 64 instead of the diaphragm 64.
3 and has a similar pump function.

Further, FIG. 4 shows a fourth embodiment of the present invention.

This embodiment is applied not to a hot water water heater but to a hot water generator for snow removal.

That is, this hot water generating device for snow removal includes the main body 10, the Stirling engine 19, and the cylinder 13 shown in FIG.
The hot water generation system including b is assumed to be the main body 75 of the second machine. Snow again 7
A receiver 78 for collecting melted snow 79 is provided at the lower part of the plate-like part 77 having a group of small holes 76 for receiving 9, and a hot water injection nozzle pipe 80 is installed above the snow 79 accumulated on the plate-like part 77. The arranged structure is referred to as a snow melting system 81. And this snow melting system 8
1 is connected to the device main body 75.

Specifically, the outlet channel 47 of the device main body 75 and the hot water injection nozzle pipe 80 are connected, and the intake port 14 of the device main body 75 and the receiver 78 are connected via a return pipe 82. .

This hot water generator for snow removal has a pump function using the diaphragm displacement of the device main body 75 described in the first embodiment, and the snow melt received at the receiver 78 is taken into the device main body 75, and the water is transferred to the Stirling engine. Heat water by heating loss heat, combustion heat, etc. Then, this hot water is sent to a hot water injection nozzle pipe 80, the snow 79 is melted by the injection of hot water, and the melted cold water is returned to the receiver 78 via the plate-shaped portion 77.

Therefore, it can be seen that the snow removal hot water generator can also melt the snow 79 with the hot water obtained without requiring an external power supply section. Moreover, since cold water is always supplied as cooling water to the cooling heat exchanger 32 of the Stirling engine, the thermal efficiency of the Stirling engine is high.
It has a big effect.

That is, the theoretical thermal efficiency η of the Stirling engine is η-1 (TC/TH), where Tc is the temperature T on the low temperature side of the Stirling engine, and Tc is the temperature on the high temperature side of the Stirling engine.

It is expressed as

However, as mentioned above, if the temperature of the cold water is low,
Thermal efficiency will be improved. This has the effect of lengthening the operating time for a fixed amount of combustion and the effect of increasing engine output (pump output).

Further, FIG. 5 shows a fifth embodiment of the present invention.

This embodiment is applied to a bath water heater.

That is, this bath water heater uses the device main body 75 described in the fourth embodiment. The structure in which the outlet channel 47 of the device body 75 is connected to the bathtub faucet 85 and the intake channel 86 is connected to the intake port 14 of the device body 75 heats the water pumped into the device body 75 to create a bathtub. I'm trying to send it to 88. In addition, a switching valve (three-way valve) 89 is provided in the intake passage 86.
The hot water outlet channels 9o that open into the bathtub 88 are connected in parallel through the bathtub 88 to heat the hot water accumulated in the bathtub 88, so-called recharging.

Further, FIGS. 6 to 11 show a sixth embodiment of the present invention. This embodiment shows a hot water generating device that can be switched between a mode that generates hot water with high efficiency and a mode that can also generate cold water.

As shown in FIG. 6, this hot water generator uses a structure in which the Stirling engine 100 described in the first embodiment is provided with a Stirling machine 101 and various heat exchangers. Specifically, the following structure is used.

That is, as shown in FIG. 7, the Stirling engine 100 uses the same displacer type engine as described in the first embodiment. Further, the Stirling machine 101 includes the above-mentioned Stirling engine 100.
It has a similar structure. In addition, Stirling machine 1
01 has a different role from that of the Stirling engine 100, so the part names and the same symbols of important parts are changed to distinguish them. Specifically, the cylinder 102, the low temperature piston 103, the high temperature piston 104, the high temperature space 105 (the cylinder space formed between the low temperature piston 103 and the high temperature piston 104), the low temperature space 106 (the low temperature piston 10
3 and the cylinder bottom wall),
A low temperature side heat exchanger 109, a regenerator 110, and a high temperature side heat exchanger 111 are used. The open ends of the cylinders of this Stirling machine 101 and the Stirling engine 100 are airtightly connected via a flange 107a, and the Stirling engine 100 and the Stirling machine 101 are disposed coaxially. Further, the cylindrical cams of the Stirling engine 100 and the Stirling machine 101 are connected to the connecting portion 1.
The pistons 103 and 104 of the Stirling machine 101 are driven to reciprocate by the rotational force output from the Stirling engine 100.

Note that the pistons move relative to each other: the low-temperature piston 103 of the Stirling machine 101 moves relative to the displacer 24 of the Stirling engine 100, and the high-temperature piston 10 also moves relative to the displacer 24 of the Stirling engine 100.
4 is connected to move relative to the power piston 25, for example, the low temperature piston 103 is at the top dead center (7th
7), the displacer 24 is at the top dead center (lower side in FIG. 7). In this way, dynamic balance is achieved without requiring a balance weight, and pressure pulsations are generated in the space behind the power piston 25 and the high temperature piston 104. A pulsation outlet body 108 for extracting the pressure pulsations is provided in a protruding manner on the peripheral wall of the cylinder 20 near the flange portion 107a.

Further, the working space of the Stirling machine 101 is filled with the same gas as the working gas of the Stirling engine 100, and a sealing device for partitioning the Stirling engine 100 side and the Stirling machine 101 side from each other is omitted. There is. Thus, in the Stirling machine 101, the low-temperature piston 103 and the high-temperature piston 104 are reciprocated by the rotational drive of the cylindrical cam 21, and the high-temperature side heat exchanger 111 is cooled.
The working gas No. 01 moves within the working space at a high temperature or a low temperature, and the low temperature side heat exchanger 109 becomes low temperature.

The Stirling engine 1 configured in this way
A first jacket 112 (corresponding to a heat exchange section) for water circulation is provided on the outer peripheral surface of the cylinder 00 so as to cover the cooling heat exchanger 32.

In addition, a second jacket 1 for water circulation is provided on the outer peripheral surface of the Stirling machine 101 so as to cover the high temperature side heat exchanger 111.
13 and a third jacket 114 for water circulation is provided to cover the low temperature side heat exchanger 109. Then, as shown in FIG. 6, in the pulsating outlet body 108,
As in the previous second embodiment, the valve body 69 and the diaphragm 6
4. A pump section 115 composed of check valves 65 and 67 is connected. An intake passage 66 that opens into the container 17 is connected to the check valve 65 side, which is the inlet side of the pump section 115. Also, a check valve 67 on the outlet side of the pump section 115
The second jacket 11 is connected to the flow path 116 connected to the
An introduction path 117 connected to the inlet of the third jacket 114 and an introduction path 118 connected to the inlet of the third jacket 114 are connected in parallel. Further, a low temperature water faucet 122 is connected in parallel to the flow path 116 via a flow path switching device 119 formed of, for example, an electromagnetic three-way switching valve. One inlet/outlet portion of the first jacket 112 is connected to the other switching port portion of the flow path switching device 119 .

The outlet of the third jacket 114 is connected to a cold water faucet 123 made of, for example, a three-way switching valve, and the other entrance/exit of the first jacket 112 is connected to a low-temperature water faucet 124 of, for example, a three-way switching valve. ing. The other switching port of each cold water faucet 123 and the low temperature water faucet 1
24 is connected to the other switching port section through a relay path 125.

Further, this relay path 125 is equipped with an on-off valve 120 made of, for example, an electromagnetic two-way valve, and the on-off valve 120 is used to independently supply cold water and hot water from the cold water faucet 123 and the low-temperature water faucet 122. I'm making sure I can get out of the water.

Further, the outlet of the second shut 113 is connected to the waste heat heat exchanger 44 provided around the high temperature section of the Stirling engine 19, as described in the first embodiment. A high-temperature water faucet 126 made of, for example, a two-way valve is connected to the outlet of the waste heat heat exchanger 44.

The flow path switching device W119 is connected to an operating section (none of which is shown), for example, via a drive control section. Further, the operating section is similarly connected to the on-off valve 120, and the flow path switching device 1
19 and the opening/closing operation of the on-off valve 120 are manually performed. Then, in the operation section, the first jacket 112 and the low temperature water faucet 119 are switched to the side that communicates with each other, and the on-off valve 120 is set to the closed side, thereby increasing the efficiency of the Stirling engine 19 and connecting the low temperature water faucet 122 and the high temperature water faucet 119 to each other. Hot water can be supplied from the water faucet 126. Conversely, in the operating section, the first jacket 112 and the discharge side of the pump section 115 are switched to the side that communicates with each other, and the on-off valve 120 is set to the open side, thereby maintaining the efficiency of the Stirling engine 19 while maintaining the cold water faucet. Cold water can be supplied from 123, and hot water can be supplied from low temperature water faucet 124 and high temperature water faucet 126. In other words, the flow path switching device 122 selects the full hot water mode, which provides an operation with excellent thermal efficiency, that is, the effect of lengthening the operation time for a certain amount of combustion as described in the previous embodiment, and the effect of increasing the engine output. The faucet can be switched to a normal cold/hot water mode that does not cause such problems, and depending on how each faucet is used, the cold water or hot water obtained in the above mode can be dispensed.

To explain the operation of such a hot water generator, first, as in the first embodiment, the Stirling engine 100 is started using the pump 39. When the Stirling engine 100 is started, the rotational force generated in the cylindrical cam 21 of the Stirling engine 100 is transmitted to the low-temperature piston 103 and the high-temperature piston 104 via the cylindrical cam 21 of the Stirling machine 1010. The high temperature piston 104 is reciprocated with a predetermined phase difference. As a result, the working gas of the Stirling machine 101 becomes high or low temperature and moves within the same working space (all the closed spaces communicating the high temperature space 105 and the low temperature space 106), and the low temperature side heat exchanger 109
becomes lower temperature.

Then, in the pump section 115 driven by the pulsation generated in the Stirling engine 100, the intake passage 66
Water is sucked in and discharged to the inlet channel.

Here, if the operating section (not shown) is operated to switch to the cold/hot water mode side, the flow path switching device 119 is switched to the side where the first jacket 112 and the discharge side of the pump section 115 communicate with each other. At the same time, the on-off valve 120 starts to operate "open". As a result, the water discharged from the pump section 115 is transferred to the third jacket 114 and the second jacket 11, respectively.
3, branched into the first jacket 112;

When the cold water faucet 123 is opened from the cold/hot water mode, a portion of the water discharged from the pump section 115 enters the third jacket 114 and is cooled. Specifically, 1. For example, assuming that the temperature of the sucked water is 20° C., the low temperature side heat exchanger 10 which becomes the low temperature of the Stirling machine 101
9, it is cooled to "0 to 15°C". This cold water is discharged from the cold water faucet 123.

Furthermore, when the low-temperature water faucet 124 is opened instead of the cold water faucet 123, some of the water discharged from the pump section 115 enters the first jacket 112 and receives heat from the Stirling engine 100, resulting in a temperature of 30 to 50°C. The water becomes warm. Then, this hot water is discharged from the low temperature water faucet 124.

Note that in this mode, the on-off valve 120 is open, so of course cold water and low-temperature water can be discharged at the same time.

Furthermore, when the high-temperature water faucet 126 is opened, some of the water discharged from the pump section 115 enters the second jacket 113, receives heat from the Stirling machine 101, and reaches a temperature of 30 to 50°C.
” The water becomes warm.

Then, this hot water flows to the waste heat heat exchanger 44, and when passing through the heat exchanger 44, some of the combustion heat generated in the combustor 13a does not enter the heating heat exchanger 34 of the Stirling engine 100. A portion of the exhaust heat is recovered and
The water becomes 90 degrees Celsius. Then, this hot water is discharged from the high temperature water faucet 126.

However, in Figure 6, the dashed arrow indicates the water (hot water) when using cold water.
The flow is shown below.

The PV (pressure-volume) diagram in such cold/hot water mode is as shown in FIG. 8, and the TS (temperature-entropy) diagram is as shown in FIG. 9. In addition, rl,
2.3,4J indicates Stirling engine, r5.6
, 7.8J indicates a Stirling machine.

On the other hand, if the operation unit (not shown) is operated to switch to the full hot water mode, the flow path switching device 119 is switched to the side where the first jacket 112 and the low-temperature water faucet 124 communicate, and at the same time, the on-off valve 120 operates to "r close". As a result, the water discharged from the pump section 115 is branched into the second jacket 113 and the third jacket 114, as shown by solid arrows in FIG.

When the low-temperature water faucet 124 is opened in the hot water mode, some of the water discharged from the pump section 115 enters the third jacket 114 of the Stirling machine 101.
After being cooled to a water temperature of “0 to 15° C.”, it enters the first jacket 112 of the Stirling engine 100. Then, after receiving the heat dissipation from the Stirling engine 100, "30 ~
It is heated to 50℃. Then, this hot water is discharged from the low temperature water faucet 124.

Here, the cooling heat exchanger 32 of the Stirling engine 100 has a temperature of 20° C. of the water pumped up by the pump section 115.
Since water at a temperature of 0 to 15 degrees Celsius, which has been cooled by the heat loss of the Stirling machine 101, is supplied as cooling water instead of the water of , the thermal efficiency of the Stirling engine 100 becomes higher.

In other words, a part of the output of the Stirling machine 101 is used to increase the thermal efficiency of the Stirling engine 100 while increasing the thermal efficiency of the Stirling engine 100.
It supplies hot water at a temperature of 50℃.

Also, if you open the high temperature water faucet 126, as mentioned above,
A part of the water discharged from the pump part 115 enters the second jacket 113 and becomes hot water of "30 to 50 degrees Celsius", and then the heat recovered by the waste heat heat exchanger 44 warms the water to "50 to 50 degrees Celsius".
It is heated to 90℃. Then, this hot water is discharged from the high temperature water faucet 126. At this time, as described above, a portion of the output of the Stirling machine 101 is used to increase the thermal efficiency of the Stirling engine 100 and supply high-temperature hot water.

Here, talking about thermal efficiency, the Pv (pressure-volume) diagram and TS (temperature-enthalpy) diagram in the full hot water mode are shown in FIGS. 10 and 11. That is, assuming that the wall temperature of the heating heat exchanger 34 (heater wall temperature) is constant, the wall temperature of the cooling heat exchanger 32 (cooler wall temperature) is P by the amount of cooling by the Stirling machine 101.
In the V diagram and TS diagram, the area surrounded by rl, 2, 3, and 4J is larger than in the PV diagram and TS diagram for the cold/hot water mode, and the larger area corresponds to the Stirling engine. 100 output becomes higher. Further, from the TS diagram, it can be seen that heat is transferred efficiently between the Stirling engine 100 and the Stirling machine 101 as well.

However, hot water can be obtained with high efficiency, and cold water can also be obtained as needed.

Further, FIG. 12 shows a seventh embodiment of the present invention. This embodiment is a modification of the sixth embodiment, and is applied to a refrigeration system, for example, a cold storage such as a small refrigerator or a portable refrigerator. That is, the cooling characteristics of the Stirling machine 101 are used to cool the inside of the refrigerator.

Specifically, instead of a faucet and an on-off valve, a cooling device is installed between the third jacket 114 of the Stirling machine 101 and the first jacket 112 of the Stirling engine 100 in the cold storage compartment 130a of the refrigerator 130. Vessel 1
31 is inserted. In addition, the second jacket 113 and the third jacket of the Stirling machine 101 are provided on the discharge side of the pump section 115.
Only the jackets 114 of the two are connected in parallel. Furthermore, the Stirling engine 100 is installed on the suction side of the pump section 115.
The other end of the first jacket 112 of the Stirling machine 101 and the outlet of the second jacket 113 of the Stirling machine 101 are connected in parallel, and the suction side of the pump section 115 and the outlet of the second jacket 113 are connected in parallel. Connection path 13 connecting
2 is provided with a heat radiator 133 to form a closed circuit. In this closed circuit, instead of water, brine or a high boiling point refrigerant such as R123, which does not vaporize even when heated, is sealed.

In this embodiment, a two-engine Stirling engine 100 and a Stirling machine 101 are used, in which opposing pistons on the engine side and the machine side are arranged in parallel.

According to such a cold storage, when the Stirling engine 100 is started and the pump section 115 is operated by the same pressure pulsation, the brine is transferred to the second jacket 113 and the third jacket 1 of the Stirling machine 101.
14.

The brine that has reached the third jacket 114 is cooled by the Stirling machine 101. Then, this brine absorbs heat in the cooler 131 and cools the inside of the refrigerator. Next, when the cooled brine passes through the first jacket 112 of the Stirling engine 100,
The cooling heat exchanger 32 of the Stirling engine 100 is cooled down. In other words, as in the previous embodiment, the temperature on the low temperature side of the Stirling engine 100 is lowered to increase efficiency.

In addition, the brine that has reached the second jacket 113 receives heat from the Stirling machine 101, and then is transferred to the next-stage heat radiator 1.
At step 33, the heat is radiated into the weather. The brine that has passed through the heat radiation 133 is then transferred to the Stirling engine 1.
It is sucked into the pump section 115 together with the brine that helped dissipate the heat of 00.

By repeating this cycle, the inside of the refrigerator can be kept cool. Moreover, since the temperature on the low temperature side of the Stirling engine 100 is cooled by a part of the output of the Stirling machine 101, efficiency is good. Specifically, PV
If shown in a diagram and a TS diagram, the state is intermediate between the PV diagram and TS diagram shown in FIGS. 8 and 9 and the PV diagram and TS diagram shown in FIGS. 10 and 11. This results in an efficient cycle.

However, in addition to the cold storage, a heat radiator 133 is separately installed inside the refrigerator as shown by the two-dot chain line in FIG.
It may be set to 4. Further, the inlet/outlet portion of the cooler 131 and the inlet/outlet portion of the radiator 133 are connected by bypass passages (none of which are shown) each having a switching valve, for example, a three-way switching valve, and by switching the three-way switching valve, Cooler 11
31 may be used as a radiator, and the radiator 133 may be made to function as a cooler to provide cold insulation. Of course, when keeping warm,
As in the first embodiment, a waste heat heat exchanger 44 may be used to maintain heat by utilizing waste heat.

In addition, in the above-mentioned second embodiment to seventh embodiment,
Components that are the same as those in the first embodiment described above are given the same reference numerals and their explanations are omitted.

In addition, in the above-mentioned embodiment, a displacer type engine is used for the tarling engine in order to make it small and lightweight. It's okay.

[Effects of the Invention] As explained above, according to the present invention, hot water can be generated with high efficiency without requiring a power supply section.

In addition, since the liquid to be heated is heated using combustion heat which reaches a considerably high temperature, it is more efficient than one using an electric heater.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a hot water generator according to a first embodiment of the invention, FIG. 2 is a sectional view showing a hot water generator according to a second embodiment of the invention, and FIG. 3 is a sectional view showing a hot water generator according to a second embodiment of the invention. FIG. 4 is a sectional view showing a hot water generating device according to a fourth embodiment of the present invention, and FIG. 5 is a sectional view showing a hot water generating device according to a fifth embodiment of the present invention. 6 to 11 show a sixth embodiment of the invention, FIG. 6 is an overall configuration diagram of a hot water generator, and FIG. 7 is a sectional view showing a Stirling engine and a Stirling machine. , Figure 8 is the PV diagram in cold/hot water mode, Figure 9 is the same <TS diagram,
FIG. 10 is a PV diagram in full hot water mode, FIG. 11 is the same <TS diagram, and FIG. 12 is a configuration diagram showing a cold storage device to which the hot water generator of the seventh embodiment of the present invention is applied. . 12...Storage part (heat exchanger part), 13a...Combustor (combustor M), 16-...Intake port (flow path), 16a. 41.42...Check valve, diaphragm (pump part),
19... Stirling engine, 24.25... Displacer, power piston (piston part), 30.
...High temperature part space, 31...Low temperature part space, 32... Cooling heat exchanger (cooler) 33... Reheater (heat storage)
, 34... Heating heat exchanger (heater).

Claims (1)

[Claims] A Stirling engine is provided with a piston part forming a high temperature part space and a low temperature part space in a cylinder, and a heater, a heat storage device, and a cooler are connected between the high temperature part space and the low temperature part space; a combustion device that supplies heat to drive the Stirling engine; a heat exchanger section that is provided in at least the cooler of the Stirling engine and exchanges heat with heat generated in the cooler; and a heat exchanger section that is connected to the heat exchanger section. The method includes a flow path for circulating water to the heat exchanger section, and a pump means that operates using pressure pulsations generated in the Stirling engine as a driving source for sending water from the flow path to the heat exchanger section. Features of hot water generator.