JPH102252A - Heater for external combustion thermal gas engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To well transfer heat of a flame from a combustor to a tube of a heater. SOLUTION: This heater 16, comprising a group of radially extended tube 81 by connecting between a high temperature side piston vessel 83 and a high temperature regenerator vessel 85, is constituted to be heated by a flame from a combustor 11 so as to heat operating gas flowing inside the tube 81. Here, one end of each tube 81 is connected to almost the same circumference of the high temperature side piston vessel 83, to be bent respectively in the circumferential direction, the other end of each tube 81 is connected to almost the same circumference of the high temperature regenerator vessel 85 with a phase shifted from one end side of the tube 81.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater for an external combustion type hot gas engine, which is suitable as a cooling source for a cooling / heating device, a hot water supply device and the like.

[0002]

2. Description of the Related Art In recent years, as a device for cooling, heating and hot water supply,
A heat pump using a Vermier cycle, which is an external combustion type hot gas engine (hereinafter referred to as VMHP: Vuilleumier Cycle Hea)
t Pump) has been developed. The VMHP causes a pressure change only by a change in the temperature distribution of He (helium) gas as an encapsulating medium (working gas), thereby enabling direct heating / cooling / hot water supply (for example, Japanese Patent Application Laid-Open No. HEI 5-5-2).
65777 or JP-A-4-113170).

As shown in FIG. 6A, the working gas circuit of the VMHP includes a high temperature side piston container 61 and a high temperature regenerator container 6.
3, a heater 65 is provided. This heater 65
Is composed of a group of tubes 67 extending radially, and is heated by a flame from a combustor 71 including a gas burner 69, for example, and heats a working gas flowing inside the tubes 67. The flame from the burner 69 spreads to a substantially central portion C of the group of tubes 67 as shown in FIG. 6B, and then propagates outward.

[0004]

However, in the conventional heater, as shown in FIG. 6B, the other end 67b of each tube 67 is connected to one end 67a of each tube 67 when viewed from the central portion C of the group of tubes 67. , The flame from the burner 69 does not sufficiently hit the other end 67b of each tube 67, the heat efficiency is poor, and the temperature at one end 67a is lower than the other end 67b.
There was a problem that it was higher than that.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide an external combustion type hot gas engine capable of favorably transmitting a flame from a combustor to a tube of a heater. To provide a heater.

[0006]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a combustor comprising a group of radially extending tubes connecting a high-temperature side piston container and a high-temperature regenerator container. In the heater of the external combustion type heat gas engine which is heated by the flame from and heats the working gas flowing inside the tube, one end of each of the tubes is connected on substantially the same circumference of the high temperature side piston container, Each of the tubes is bent in the circumferential direction, and the other end of each of the tubes is connected to substantially the same circumference of the high temperature regenerator container while being shifted in phase from the one end of the tubes.

[0007] The invention according to claim 2 comprises a group of tubes extending radially connecting the high-temperature-side piston container and the high-temperature regenerator container, and is heated by a flame from the combustor so that the inside of the tubes is formed. In the heater of the external combustion type hot gas engine that heats the flowing working gas, one end of each of the tubes is connected to substantially the same circumference of the high-temperature side piston container, and each of the tubes is bent outward from the circle and upwardly. Being raised and bent in the circumferential direction, the other end of each of the tubes is connected to substantially the same circumference of the high temperature regenerator container out of phase with the one end of the tubes.

According to the third aspect of the present invention, the high temperature side piston container and the high temperature regenerator container are connected to each other, and are formed of a group of radially extending tubes, which are heated by a flame from the combustor and flow inside the tubes. In the heater of the external combustion type hot gas engine that heats the working gas, one end of each of the tubes is connected to substantially the same circumference of the high temperature side piston container, and each of the tubes is bent outward from the circle, and stands up. The tubes are raised and bent in the circumferential direction, and the other ends of the tubes are bent inward, respectively, and connected to substantially the same circumference of the high-temperature regenerator container out of phase with one end of the tubes. It is characterized by that.

In the VMHP, the high temperature side piston of the hot gas engine is housed in a high temperature side piston container, and the working gas in the high temperature chamber in the high temperature side piston container is sent to the high temperature regenerator container through a plurality of tubes. . The plurality of tubes constitute a heater. The flame from the combustor enters the central portion of the tube group constituting the heater, propagates from there to the outside, and heats the working gas in the tube.

[0010] According to these inventions, the propagation of the flame of the combustor is extremely excellent. The flame of the combustor entering the center of the tube group passes through one end of each tube and propagates to the other end of each tube. In this case, the other end is bent in the circumferential direction and is arranged out of phase with the one end, so that the other end of the tube is not hidden behind the one end, and the other end of the tube also has the radiant heat of the flame. The heat of the combustion gas is sufficiently transmitted.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a cold / hot water supply circuit of an air conditioner, which employs a Vilmier cycle hot gas engine 1 whose perspective view is shown in cross section in FIG.

The hot gas engine 1 has a high-temperature side piston 2 and a low-temperature side piston 3 arranged orthogonally to each other, and these are housed in a container filled with a working gas such as helium. Inside the container is a high-temperature chamber 12 and medium-temperature chambers 13 and 14.
And a low-temperature chamber 15. In addition, high temperature room 12
Has a heater 16 at the end thereof, and the heater 16 is heated by the combustor 11.

When the high temperature side piston 2 reaches an intermediate position between the top dead center and the bottom dead center, for example,
The low-temperature side piston 3 is positioned 9
In order to operate with a phase shift of 0 °, they are connected via a crank 10 driven by a motor 9. When the high temperature side piston 2 and the low temperature side piston 3 operate, the sealed working gas passes through the high temperature regenerator 4 and the low temperature
Move between 2 and 13, 14 and 15. The working gas is heated or cooled when passing through the regenerators 4 and 7, so that the pressure in the closed vessel is increased or reduced. For example, when the working gas in the high-temperature chamber 12 moves to the middle-temperature chamber 13 through the high-temperature regenerator 4, the heat energy of the working gas is stored in the high-temperature regenerator 4, and the pressure of the working gas decreases. Conversely, when the working gas recirculates from the medium temperature chamber 13 to the high temperature chamber 12, the thermal energy stored in the high temperature regenerator 4 is released to the working gas, and the pressure of the working gas increases. When the working gas in the low-temperature chamber 15 moves to the medium-temperature chamber 13 through the low-temperature regenerator 7, the working gas is supplied with the thermal energy of the high-temperature regenerator 4, and the pressure of the working gas also increases. Conversely, the working gas flows from the medium temperature chamber 13 to the low temperature chamber 1
At the time of recirculation, the thermal energy of the working gas is absorbed by the low-temperature regenerator 4, and the pressure of the working gas decreases. Also,
Exchange of thermal energy with the outside
And a low-temperature heat exchanger 8 connected to the low-temperature chamber.

For example, when the heater 16 gives thermal energy to the working gas in the high-temperature chamber 12, the working gas in the medium-temperature chambers 13, 14 emits thermal energy to the external heat medium via the medium-temperature heat exchangers 5, 6. At the same time, the working gas on the low temperature chamber 15 side absorbs heat energy from the external heat medium via the low temperature heat exchanger 8.

That is, in the hot gas engine 1 of the present embodiment, the low-temperature heat exchanger 8 and the low-temperature chamber 15 constitute a heat absorbing portion, while the medium-temperature heat exchangers 5 and 6 and the medium-temperature chambers 13 and 14 radiate heat. The air conditioner 100 which constitutes a part and uses the low temperature heat exchanger 8 and the medium temperature heat exchangers 5 and 6 of the hot gas engine 1 is provided. The air conditioner 100 includes a hot gas engine 1, an indoor unit 200, and an outdoor unit 300.

An indoor heat exchanger 201 is provided in the indoor unit 200, and an outdoor heat exchanger 300 is provided in the outdoor unit 300. 203 is an indoor fan and 303 is an outdoor fan. The low-temperature heat exchanger 8 and the indoor heat exchanger 201 are connected by a pipe 21, a four-way valve 36 and a pipe 22, and the indoor heat exchanger 201 and the low-temperature heat exchanger 8 are further connected by a pipe 23 and a four-way valve 37. It is connected to a pipe 24.

The intermediate heat exchanger 5 and the outdoor heat exchanger 30
1 is connected by a pipe 31, a four-way valve 36 and a pipe 32, and the outdoor heat exchanger 301 and the medium temperature heat exchanger 6 are connected by a pipe 33, a four-way valve 37 and a pipe 34. The intermediate-temperature heat exchangers 5 and 6 are connected by a pipe 35. Water (hereinafter, referred to as liquid refrigerant) is used as an external heat medium circulating in the pipeline.

During the cooling operation, the hot gas engine 1 is operated by the ignition of the combustor 11, and the heat energy of the working gas is released to the liquid refrigerant through the medium temperature heat exchangers 5, 6, while the low temperature heat exchanger is operated. The heat energy of the liquid refrigerant is absorbed by the working gas through the pipe 8. At this time, the four-way valves 36 and 37 are switched as shown by the solid line in FIG. 1, and the liquid refrigerant that has released the heat energy in the low-temperature heat exchanger 8 is supplied to the pipeline 21 and the four-way valve 3.
6. It flows to the indoor heat exchanger 201 via the pipe 22.
In the indoor unit 200, the indoor heat exchanger 201 which has become low temperature
Is blown from the indoor fan 203, cool air is blown into the room (cooling is performed), and the liquid refrigerant that has absorbed the heat energy of the room air passes through the pipe 23, the four-way valve 37, and the pipe 24. It recirculates to the low-temperature heat exchanger 8.

At this time, the liquid refrigerant having absorbed the heat energy in the intermediate-temperature heat exchanger 5 is supplied to the pipe 31, the four-way valve 36, and the pipe 32.
Through the outside fan 303, where it is cooled by the air blown from the outdoor fan 303, flows through the pipe 33, the four-way valve 37, and the pipe 34 to the middle-temperature heat exchanger 6, and further through the pipe 35 to exchange medium-temperature heat. Reflux to vessel 5.

Also, during the heating operation, the hot gas engine 1 is operated by the ignition of the combustor 11, and the heat energy of the working gas is absorbed by the liquid refrigerant through the medium-temperature heat exchangers 5 and 6, while the low-temperature The heat energy of the liquid refrigerant is released to the working gas via the heat exchanger 8, and at this time, the four-way valves 36 and 37 are switched as shown by the dotted lines in FIG.

In this case, the liquid refrigerant having absorbed the heat energy in the intermediate temperature heat exchangers 5 and 6 flows to the indoor heat exchanger 201 via the pipe 31, the four-way valve 36 and the pipe 22.

In the indoor unit 200, air is blown from the indoor fan 203 to the indoor heat exchanger 201, which has become relatively high temperature, so that warm air is blown into the room (heating is performed). The liquid refrigerant that has released energy is connected to line 2
3, the intermediate temperature heat exchanger 5 via the four-way valve 37 and the pipe 34
Reflux to 6.

At this time, the liquid refrigerant that has released the thermal energy in the low-temperature heat exchanger 8 is supplied to the pipe 21, the four-way valve 36, the pipe 32.
Then, after flowing into the outdoor heat exchanger 301 through the outdoor fan 303 to absorb the heat energy of the outside air, the air flows back to the low-temperature heat exchanger 8 via the pipe 33, the four-way valve 37, and the pipe 24.

Hereinafter, the heater 16 will be described with reference to FIGS. 3A and 3B.

The heater 16 is composed of a plurality of radially extending tubes 81, which are connected between a high-temperature side piston container 83 and a high-temperature regenerator container 85. As shown in FIG. 3B, one end 81a of each tube 81 is connected to the circumference of substantially the same circle A of the high temperature side piston container 83 and bent in the circumferential direction, and the other end 81b of each tube 81 is connected to each tube 81 Are connected on substantially the same circumference B of the high-temperature regenerator container 85 with the phase shifted from the one end 81a side in the counterclockwise direction.

According to this embodiment, as shown in FIG. 3B, since each tube 81 is bent in the circumferential direction, each tube 81 is viewed from the center C of the tube 81 group.
One other end 81b is exposed between the one ends 81a. That is, the other end 81b of each tube 81 is connected to each tube 8
There is no hiding behind one end 81a.

Therefore, the flame from the burner 87 of the combustor 11 enters the central portion C of the group of tubes 81, and the tubes 8
When passing through one end 81a and propagating to the outside, the other end 8 of the tube 81 is placed between the one end 81a.
1b is exposed, the radiant heat and flow of the flame are reduced to the other end 81b.
And the heat loss of the flame is suppressed, so that the efficiency of the heater 16 is greatly improved as compared with the conventional one.

FIGS. 4a and 4b show another embodiment.

The heater 16 is composed of a plurality of radially extending tubes 91, which are connected between a high temperature side piston container 93 and a high temperature regenerator container 95. One end 91a of each tube 91 is connected on the circumference of substantially the same circle A of the high temperature side piston container 93 as shown in FIG. 4B, and is once drawn out obliquely outward as shown in FIG. As shown in the drawing, the other end 91b of each tube 91 is bent inward again, as shown in FIG. 4a, and the other end 91b of each tube 91 is bent inward as shown in FIG. 4b. The high temperature regenerator container 95 is connected on the circumference of the same circle B with a phase shifted in the counterclockwise direction.

According to this embodiment, as shown in FIG. 4A, after each tube 91 is once bent obliquely outward,
As shown in FIG. 4B, each of the tubes 9 is bent in the circumferential direction.
One other end 91b is exposed between the one ends 91a. That is, the other end 91b of each tube 91 is connected to each tube 9
There is no hiding behind one end 91a of one.

Therefore, the flame from the burner 97 of the combustor 11 enters the central portion C of the tube 91 group, and
When passing through one end 91a and propagating to the outside, the other end 9a of the tube 91 is placed between the one end 91a.
1b is exposed, the radiant heat and flow of the flame are reduced to the other end 91b.
And the heat loss is suppressed, thereby also improving the efficiency of the heater 16 as compared with the conventional one.

FIGS. 5a and 5b show another embodiment.

The heater 16 is composed of a plurality of radially extending tubes 51, which are connected between the high temperature side piston container 53 and the high temperature regenerator container 55. One end 51a of each tube 51 is connected on the circumference of substantially the same circle A of the high-temperature side piston container 53 as shown in FIG. 5B, and once raised upward as shown in FIG. Derived obliquely and furthermore in FIG.
As shown in FIG. 5, each of the tubes 51 is bent in the circumferential direction, and the other end 51b of each tube 51 is again bent obliquely inward as shown in FIG.
As shown in FIG. 3B, the same circle B of the high temperature regenerator container 55 is shifted from the one end 51a side of each tube 51 in the counterclockwise direction.
Are connected on the circumference.

According to this embodiment, as shown in FIG. 5A, after each tube 51 is once bent obliquely outward,
As shown in FIG. 5B, since each of the tubes 5 is bent in the circumferential direction, each tube 5
One other end 51b is exposed between the one ends 51a. That is, the other end 51b of each tube 51 is connected to each tube 5
There is no hiding behind one end 51a.

Accordingly, the flame from the burner 57 of the combustor 11 enters the central portion C of the group of tubes 51, and the tubes 5
When passing through one end 51a of the tube 51 and propagating to the outside, the other end 5
1b is exposed, the radiant heat and flow of the flame are reduced to the other end 51b.
And the heat loss is suppressed, thereby also improving the efficiency of the heater 16 as compared with the conventional one.

In short, according to this embodiment, by arranging the one end side and the other end side of the tube so as to be shifted in phase in the circumferential direction, the flame propagating outside through the space between one end of the tube. The radiant heat and flow are efficiently applied to the other end of the tube. It is apparent that all the components having such a configuration are included in the present invention and are not limited to the above-described embodiment.

[0038]

As described above, according to the heater of the present invention, the one end and the other end of the tube are arranged with their phases shifted in the circumferential direction, so that the tube can pass through one end of the tube. Thus, the radiant heat and flow of the flame propagating to the outside can be efficiently applied to the other end of the tube, so that the efficiency of the heater can be remarkably improved and the temperature difference of the entire tube can be reduced.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of a heat pump type air conditioner.

FIG. 2 is a sectional perspective view showing a structure of a hot gas engine.

3A and 3B are cross-sectional views showing one embodiment of a heater, II.
It is an I-III top view.

4A and 4B are cross-sectional views showing another embodiment of a heater.
It is an IV-IV top view.

5A and 5B are a sectional view and a VV plan view showing still another embodiment of the heater.

6A and 6B are a cross-sectional view and a VI-VI plan view showing a conventional heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot gas engine 2 High temperature side piston 10 Crank 11 Combustor 12 High temperature room 13, 14 Medium temperature room 15 Low temperature room 16 Heater 51, 81, 91 Tube 53, 83, 93 High temperature side piston container 55, 85, 95 High temperature regenerator Container 57, 87, 97 Burner

Claims (3)

[Claims] A high-temperature side piston container and a high-temperature regenerator container are connected to each other, and are composed of a group of radially extending tubes.
In a heater of an external combustion type heat gas engine that is heated by a flame from a combustor and heats a working gas flowing inside a tube, one end of each of the tubes is disposed on substantially the same circumference as the high temperature side piston container. External combustion type, wherein the other end of each tube is connected to substantially the same circumference of the high temperature regenerator container while being shifted in phase from the one end side of the tube. Heater for hot gas engine. 2. A group of radially extending tubes connecting the high temperature side piston container and the high temperature regenerator container,
In a heater of an external combustion type heat gas engine that is heated by a flame from a combustor and heats a working gas flowing inside a tube, one end of each of the tubes is disposed on substantially the same circumference as the high temperature side piston container. Connected to each other, bent outward from the circle, raised upward, and bent in the circumferential direction, so that the other end of each of the tubes is out of phase with one end of the tube, and the high-temperature regenerator container is shifted. A heater for an external combustion type hot gas engine, wherein the heaters are connected on substantially the same circumference. 3. A group of radially extending tubes connecting the high temperature side piston container and the high temperature regenerator container,
In a heater of an external combustion type hot gas engine which is heated by a flame from a combustor and heats a working gas flowing inside a tube, one end of each of the tubes is connected to substantially the same circumference of the high temperature side piston container. The other end of each of the tubes is bent inward and out of phase with one end of the tube, respectively, being bent outward from the circle, raised upward, and bent in the circumferential direction. Wherein the heaters are connected on substantially the same circumference of the high temperature regenerator container.