JP2896070B2 - Hot gas engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a VM (Bulmayer) cycle system used for cooling and heating, hot water supply, etc., and operates between a low-temperature heat source, a medium-temperature heat source, and a high-temperature heat source to move a working gas. The present invention relates to an improvement in a hot gas engine that absorbs heat from a low-temperature heat source and radiates heat to a medium-temperature heat source by thermal energy (thermal work) obtained from a high-temperature heat source.

[0002]

2. Description of the Related Art FIGS. 3A and 3B show a conventional typical hot gas engine used in a VM cycle system, wherein FIG. 3A is a vertical front view and FIG. 3B is a vertical side view. FIG. 3 schematically illustrates the structure of the hot gas engine. Reference numerals 1 and 2 denote a high-temperature side displacer and a low-temperature side which are connected to high-temperature side and low-temperature side cross guides 13 and 14 disposed at right angles and reciprocate, and which are built in a high-temperature cylinder 3 and a low-temperature cylinder 4 filled with working gas. Displacer. The high temperature side heat exchanger 5 communicating with the high temperature chamber 3a of the high temperature side cylinder 3 is heated by an external heat source such as a combustion gas or an electric heater. A high temperature side regenerator 6 and a medium temperature side heat exchanger 7 are interposed between the tip of the high temperature side heat exchanger 5 and the medium temperature chamber 3b of the high temperature side cylinder 3,
A low-temperature heat exchanger 8, a low-temperature regenerator 9 and a medium-temperature heat exchanger 10 are interposed between the low-temperature chamber 4a and the medium-temperature chamber 4b of the low-temperature cylinder 4. Reference numeral 12 denotes a communication path that connects the middle-temperature side heat exchanger 7 and the middle-temperature side heat exchanger 10. On the other hand, the high-temperature side and low-temperature side cross guides 13 and 14 disposed at right angles
Two connecting rods 16 connected to each other with a phase difference of 90 °,
16, a crankshaft 17, balance weights 18, 1
8 constitute a crank mechanism 15 and a crank case 19.
And the driving motor 2 is disposed on the axis of the crankshaft 17.
0 is directly connected to the crankshaft 17 (see FIG. 3A).
Hereinafter, the function of the above-described configuration will be described. When the high-temperature side displacer 1 reciprocates periodically and moves upward in the drawing, the gas inside the high-temperature chamber 3a is discharged into the high-temperature side heat exchanger 5, the high-temperature side regenerator 6, and the medium-temperature side heat exchanger 7
Flows into the medium temperature chamber 3b via the In the meantime, the working gas exchanges heat with the high-temperature side regenerator 6 and is cooled to a medium temperature, so that the pressure of the entire working gas decreases. Conversely, when the high temperature side displacer 1 moves downward in the figure,
The gas inside b flows into the high-temperature chamber 3a via the intermediate-temperature heat exchanger 7, the high-temperature regenerator 6, and the high-temperature heat exchanger 5. In the meantime, the working gas exchanges heat with the high temperature side regenerator 6 and is heated to a high temperature, so that the pressure of the entire working gas increases.
On the other hand, when the low-temperature side displacer 2 reciprocates periodically and moves in the left direction in the figure, the gas inside the medium-temperature chamber 4b is discharged to the medium-temperature side heat exchanger 10, the medium-temperature side regenerator 9, and the low-temperature side heat exchange. It flows into the low temperature chamber 4a via the vessel 8. In the meantime, the working gas exchanges heat with the low temperature side regenerator 9 and is cooled to a low temperature, so that the pressure of the entire working gas decreases. Conversely, when the low temperature side displacer 2 moves in the right direction in the figure, the gas inside the low temperature chamber 4a passes through the low temperature side heat exchanger 8, the medium temperature side regenerator 9 and the medium temperature side heat exchanger 10, and
b. During that time, the working gas exchanges heat with the low-temperature side regenerator 9 and is heated to an intermediate temperature, so that the pressure of the entire working gas increases. Here, when the pressure rises, heat is given to the outside through the middle-temperature side heat exchangers 7 and 10, and when the pressure drops, heat is pumped from the outside through the low-temperature side heat exchanger 8. Although not shown, the pipe coming out of the intermediate temperature side heat exchanger 7 returns to the intermediate temperature side heat exchanger 7 through the outdoor (or indoor) side heat exchanger, the circulation pump, and the intermediate temperature side heat exchanger 10, Further, the pipe exiting from the low-temperature side heat exchanger 8 returns to the low-temperature side heat exchanger 8 via the indoor (or outdoor) side heat exchanger and the circulation pump, and performs cooling (or heating). .

[0003]

In the conventional hot gas engine shown in FIG. 3, since the driving motor is on the axis of the crankshaft as described above, (1) the dimension in the crankshaft direction is large, and (2) ) Because of the direct connection method, the driving motor is large in order to obtain a starting torque (because the reduction ratio is 1: 1). (3) The driving motor always rotates with the crankshaft, so that the life is relatively short. ) There is a problem that the drive motor needs to be brushless.

[0004]

According to the present invention, the drive motor is not directly connected to the crankshaft, but is arranged in parallel with the crankshaft.
A timing belt having an appropriate speed reduction ratio, a transmission mechanism such as a pulley transmits the power of the driving motor to the crankshaft, and a clutch is provided in the transmission mechanism. The above problem has been solved by separating the crankshaft.

[0005]

[Function] The drive motor is not directly connected to the crankshaft, but is arranged in parallel with the crankshaft, so that the dimension in the crankshaft direction can be shortened. The size of the motor can be reduced. Further, the clutch enables the hot gas engine to be disconnected during the self-sustained operation, and the life of the driving motor is improved. Furthermore, the use of a motor with a brush becomes possible.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hot gas engine according to the present invention will be described below with reference to FIGS. 1A and 1B show a first embodiment, in which FIG. 1A is a vertical sectional front view, and FIG. 1B is a vertical sectional side view. 1, the same components as those in FIG. 3 are denoted by the same reference numerals, and only different points will be described. A one-way clutch 21 and a pulley 22 are provided at one end of the crankshaft 19, and are connected by a timing belt 24 to a pulley 23 of a driving motor 20 a arranged in parallel with the crankshaft 19.

FIG. 2 shows a second embodiment, in which (A) is a vertical sectional front view and (B) is a vertical sectional side view. The difference from the first embodiment is that a small pulley 25 and a large pulley 26 are further provided between the pulley 22 and the pulley 23, and a timing belt 24 a is provided between the pulley 22 and the small pulley 25. Are connected by a timing belt 24b.

The operation of the first and second embodiments will be described. Since the drive motor is arranged in parallel with the crankshaft and is not on the crankshaft, the length in the crankshaft direction is much shorter than in the prior art. Since the reduction ratio is large and the starting torque can be small, the motor can be downsized. In particular, in the second embodiment, the downsizing can be remarkably reduced. Further, since the motor can be disconnected by the clutch during the self-sustaining operation of the hot gas engine, the life of the motor can be improved, and a motor with a brush can be used.

[0009]

Since the hot gas engine according to the present invention is constructed as described above, the size of the heat gas engine can be reduced as a whole by reducing the size of the driving motor, which is advantageous in terms of space and cost. In addition, the clutch enables disconnection of the hot gas engine during self-sustained operation, and the life of the drive motor is improved.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a hot gas engine according to the present invention, in which (A) is a longitudinal sectional front view and (B) is a longitudinal sectional side view.

FIGS. 2A and 2B show a second embodiment of the hot gas engine according to the present invention, wherein FIG. 2A is a longitudinal front view, and FIG.

3A and 3B show a conventional hot gas engine used in a VM cycle system, in which FIG. 3A is a vertical front view, and FIG. 3B is a vertical side view.

[Description of Signs] 1: High temperature side displacer 2: Low temperature side displacer 3: High temperature side cylinder 4: Low temperature side cylinder 3a: High temperature room 3b: Medium temperature room 4a: Low temperature room 4b: Medium temperature room 5: High temperature side heat exchanger 6: High temperature side regenerator 7: Medium temperature side heat exchanger 8: Low temperature side heat exchanger 9: Low temperature side regenerator 10: Medium temperature side heat exchanger 15: Crank mechanism 17: Crank shaft 20, 20a, 20b: Drive motor 21: Clutches 22, 23, 25, 26: Pulleys 24, 24a, 24b: Timing belt

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-58-72852 (JP, A) JP-A-5-38956 (JP, A) JP-A-4-292559 (JP, A) 64853 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F25B 9/14 510 F25B 9/14 520 F02G 1/045 F02G 1/053

Claims (1)

(57) [Claims] A cylinder filled with a working gas; a high-temperature side displacer and a low-temperature side displacer for dividing the inside of the cylinder into a high-temperature chamber, a medium-temperature chamber, and a low-temperature chamber; A high-temperature side heat exchanger, a high-temperature side regenerator and a medium-temperature side heat exchanger installed in a gas flow path, and a low-temperature side heat exchanger installed in a gas flow path between the low-temperature room and the medium-temperature room; VM comprising: a side regenerator and a middle temperature side heat exchanger; a crank mechanism for connecting the high temperature side displacer and the low temperature side displacer; and a drive motor
In a hot gas engine used in a cycle system, the drive motor is arranged in parallel with the crankshaft of the crank mechanism, and the power of the drive motor is transmitted by a transmission mechanism such as a timing belt and a pulley . The transmission is provided to the crankshaft, and the transmission mechanism is provided with a clutch.
After the start of the Seki, the drive motor and the crankshaft are turned off.
A hot gas engine characterized by being separated .