JPH0440144Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a refrigeration system for vehicles, and is particularly composed of an absorption refrigeration cycle, and this refrigeration cycle is used to cool a freezer or a cold storage compartment. Regarding refrigeration equipment.

〓Summary of the invention〓 The present invention is equipped with a retarder consisting of a generator, and the load resistance that consumes the generated output generated by the generator generating electricity for braking is placed inside the generator of the absorption refrigeration cycle. The absorption refrigeration cycle cools the freezer or cold storage compartment, and a preheater through which cooling water for the vehicle's engine circulates is placed upstream of the generator. Therefore, the refrigerant of the absorption refrigeration cycle is preheated, and the output of the generator constituting the retarder and the cooling water of the engine are effectively used as the heat source of the refrigeration cycle.

〓Conventional technology〓 Absorption refrigeration cycle utilizes the difference in solution concentration of substances to perform cooling.
It can be driven by applying heat from the outside. Therefore, it becomes possible to operate the refrigeration cycle using the exhaust heat of the engine.

〓Problems that the invention aims to solve〓 However, in conventional vehicle refrigeration systems that use absorption refrigeration cycles, the heat generated by the retarder or the heat contained in the engine cooling water is not effectively used. The refrigeration cycle's refrigeration capacity was low.

The present invention was developed in view of these problems, and aims to increase the refrigerating capacity by effectively utilizing the output of the retarder used to brake the vehicle and the heat possessed by the engine cooling water. It is an object of the present invention to provide a vehicular refrigeration system that increases the temperature.

〓Means for solving the problem〓 The present invention provides a retarder consisting of a generator in a vehicle that is equipped with an absorption refrigeration cycle and uses this refrigeration cycle to cool a freezer or a cold storage compartment. A load resistor that consumes the output of the generator is arranged in the generator of the absorption refrigeration cycle, and the heat generated by the load resistor heats the refrigerant in the generator and cools the engine of this vehicle. A preheater through which water circulates is disposed upstream of the generator, and the preheater heats the refrigerant before supplying it to the generator.

〓Effect〓 Therefore, according to the present invention, the generator is heated by the output of the generator constituting the retarder, and the refrigerant supplied to the generator is heated by the engine cooling water in the preheater. Since the refrigeration system is heated in advance, the refrigeration capacity is increased, and a vehicular refrigeration system equipped with an efficient absorption refrigeration cycle is obtained.

〓Example〓 The present invention will be described below with reference to an illustrated example.
FIG. 1 shows an engine 1 equipped with a retarder according to an embodiment of the present invention, and the engine 1 is constituted by, for example, a diesel engine for a truck. A flywheel housing 2 is provided on the rear side of the engine 1. A stator case 8 of an inductor type generator, which will be described later, is attached to the upper and lower sides of the housing 2. Furthermore, a transmission 5 is arranged on the back side of the flywheel housing 2, and changes the rotation speed of the engine 1 to an appropriate value, and controls the propeller shaft 6.
The power is transmitted to the drive wheels via the

Next, the structure of the retarder provided in this engine 1 will be described. As shown in FIG.
Inductor magnetic poles 7 are arranged at predetermined pitches along the circumferential direction on the outer peripheral surface of the flywheel 4 fixed to the end of the flywheel 4.
is provided. The flywheel 4 provided with this magnetic pole 7 constitutes a rotor of an inductor type generator, and this generator constitutes a retarder of an automobile. Cases 8 are provided on the upper and lower sides of the housing 2, and a stator of an inductor type generator is housed in these cases 8.

As shown in FIG. 3, this stator includes a plurality of pole cores 9 arranged in the circumferential direction of the flywheel 4. The lower end of the pole core 9 faces the inductor magnetic pole 7 through a small air gap, and the upper end is fixed to the cover plate of the case 8 via the stator yoke 10. The pole core 9 has an armature coil 11 and a field coil 1.
2 are wrapped respectively. Note that while the armature coil 11 is wound across two pole cores 9, one field coil 12 is wound around each pole core 9.

The stator field coil 12 having such a configuration
is connected to a battery 14 via a controller 13 shown in FIG. On the other hand, the armature coil 11 of the stator which produces the power generation output is connected to a load resistor 15 shown in FIG. This load resistor 15 is disposed within a generator 16 that constitutes an absorption refrigeration cycle. The absorption refrigeration cycle is composed of a generator 16, a separator 17, a condenser 18, an evaporator 19, and a liquid receiver 20. The evaporator 19 is placed inside the freezer 21 and is designed to remove heat from inside the freezer 21.

A heat pipe 22 is attached to the generator 16, and its heat radiation side faces into the generator 16. The endothermic side of the heat pipe 22 faces into the exhaust pipe 23 of the engine 1. Further, a preheater 24 is provided on the upstream side of the generator 16, and is connected to a cooling water pipe connecting the engine 1 and the radiator 25 via a cooling water circulation pipe 26. A solenoid valve 27 is provided at the branch part of the cooling water circulation pipe 26.
is about to be installed.

Next, the operation of the retarder for this automobile configured as described above will be explained. For example, when a car equipped with this retarder goes down a long slope, the retarder switch 19 provided at the driver's seat is turned on. Then, the controller 13 shown in FIG. 2 is activated, and the battery 14
Field coil 1 of stator of inductor type generator through
A field current flows through 2, and this field coil 12 is excited.

When the field coil 12 is excited in this way, as shown in FIG. The paired pole cores 9 are magnetized to have different polarities. Therefore, at a certain moment, a magnetic circuit 35 is formed as shown by the dotted line in FIG. 3, and when the flywheel 4 rotates and the inductor magnetic pole 7 moves an angle corresponding to the pitch of the pole core 9, ,
A magnetic circuit 36 as shown by the chain line in FIG. 3 is formed.

The magnetic fluxes passing through these magnetic circuits 35 and 36 both interlink with the armature coil 11, and the two
The directions of the magnetic fluxes passing through the two magnetic circuits 35 and 36 are reversed. Therefore, due to this change in magnetic flux, an electromotive force is induced in the armature coil 11, and this inductor type generator generates electricity. This means that the engine 1 or the vehicle drives the flywheel 4, and the work done from the outside at this time is absorbed as braking force. Therefore, the vehicle receives a braking force and is decelerated by the power generated by the inductor type generator.
The generated output at this time is consumed by the load resistor 15 shown in FIGS. 1 and 2.

The output of the generator constituting the retarder is thus converted into heat by the load resistor 15, thereby heating the refrigerant in the generator 16. Furthermore, this generator 16 is heated by a heat pipe 22. That is, the heat pipe 22 is arranged between the generator 16 and the exhaust pipe 23, with its absorption side facing into the exhaust pipe 23 and its heat radiation side facing into the generator 16. Therefore, the heat of the exhaust gas flowing in the exhaust pipe 23 is guided to the generator 16 by the heat pipe 22 .

Therefore, a large amount of heat is supplied into the generator 16, and the refrigerant is heated and led to the separator 17, where it is separated into water and refrigerant gas. Then, the refrigerant gas is further guided to the condenser 18 and cooled to become a thick refrigerant liquid. The liquid refrigerant is the target freezer 2
It is evaporated in the evaporator 19 inside the freezer 21, and at that time, the heat of evaporation is taken away from the freezer 21. The refrigerant that has become a gas again in this way is led to the liquid receiver 20, and is absorbed and dissolved in the water separated by the separator 17.

The refrigerant thus turned into an aqueous solution is transferred to the generator 1.
6, it is preheated by a preheater 24. The preheater 24 is provided with cooling water for the engine 1 which is circulated through a cooling water circulation pipe 26.
The refrigerant is heated by the heat of the cooling water. Therefore, the refrigerant supplied to the generator 16 is heated in advance by the preheater 24, making it possible to improve the efficiency of this refrigeration cycle and making the exhaust heat of the engine 1 more effective. be able to use it.

As described above, according to the refrigerated truck according to this embodiment,
The generator 16 is driven by extracting heat from the exhaust gas of the engine 1 flowing through the exhaust pipe 23 via the heat pipe 22, and the vehicle also uses a generator to obtain braking force. When the retarder consisting of the retarder is operated, the load resistor 15 generates heat due to the generated output, and the inside of the generator 16 is heated. Therefore, the generator 16 is heated by these and the absorption type refrigeration cycle is driven, so that the inside of the freezer 21 is frozen. Moreover, since the preheater 24 provided in the front stage of the generator 16 uses the heat of the cooling water of the engine 1 to heat the refrigerant in advance, this allows the absorption refrigeration cycle to be heated. Efficiency is further increased, the exhaust heat of the engine 1 is utilized more effectively, and the cooling capacity of the refrigeration cycle can be increased.

〓Effect of the invention〓 As described above, the present invention provides a retarder consisting of a generator, places the load resistance that consumes the output of the generator inside the generator of the absorption refrigeration cycle, and reduces the heat generated by the load resistance. In addition to heating the solution in the generator, a preheater through which cooling water for the vehicle's engine circulates is placed in the front stage of the generator, and this preheater heats the refrigerant in advance to heat the generator. It was designed to be supplied.

Therefore, according to the present invention, when obtaining braking force by the retarder, the refrigerant in the generator is heated by the generated output of the generator that constitutes the retarder, and this causes the refrigerant to cool. The cycle is now activated. Therefore, when braking with a retarder,
The absorption refrigeration cycle is driven by effectively utilizing the energy recovered by the generator that constitutes the retarder.

Moreover, by heating the refrigerant with the engine's cooling water via the preheater, it becomes possible to preheat the refrigerant supplied to the generator, making it possible to further improve the efficiency of the refrigeration cycle. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a vehicle refrigeration system according to an embodiment of the present invention, and FIG. 2 is an external perspective view showing a retarder combined with this refrigeration cycle.
FIG. 3 is an enlarged front view of the main parts of the retarder. In addition, in the symbols used in the drawings, 1...engine, 4...flywheel, 7...inductor magnetic pole,
8...Case, 10...Stator yoke, 11...
Armature coil, 12... Field coil, 15... Load resistance, 16... Generator, 18... Concentrator, 19
... Evaporator, 21 ... Freezer, 24 ... Preheater,
25...Radiator, 26...Cooling water circulation pipe, 27...Solenoid valve.

Claims (1)

[Scope of utility model registration request] In a vehicle that is equipped with an absorption refrigeration cycle and uses this refrigeration cycle to cool a freezer or a cold storage compartment, a retarder consisting of a generator is installed, and a load resistance that consumes the output of the generator is connected to the absorption refrigeration cycle. A preheater is disposed in the generator of the cycle, and heats the refrigerant in the generator with the heat generated by the load resistance, and a preheater through which coolant for the engine of the vehicle circulates is provided on the front side of the generator. A vehicle refrigeration system characterized in that the refrigerant is heated in advance by the preheater and supplied to the generator.