CN106926663B - Warm air blower for pure electric bus - Google Patents

Abstract

The invention provides a fan heater for a pure electric bus, which comprises: a housing (1); a front panel (3) mounted on one side of the housing (1); the direct-current fan (2) and the PTC electric heater (7) are arranged in the shell (1); the top of the shell (1) is provided with an air outlet (301), and the front panel (3) is provided with an air inlet (201). Compared with the prior art, the fan heater for the pure electric passenger car has the advantages of small volume, high heating efficiency and low cost, can be arranged on the side surface of a carriage seat of the pure electric passenger car, and can directly blow the formed hot air to the bottom of the carriage, so that more comfortableness is provided for passengers. Meanwhile, the heating efficiency of the warm air blower is high, the heat generated by unit power consumption is more, the warm air blower can be conveniently combined to use according to the needs, the power consumption is effectively reduced, and the electric quantity of a power battery of a pure electric motor coach is reduced. The warm air of the pure electric bus also has the advantages of low cost, convenient maintenance and the like.

Description

Warm air blower for pure electric bus

Technical Field

The invention relates to a warm air system for a vehicle, in particular to a warm air blower for a pure electric bus.

Background

Passenger car is an important transportation means, but with the increasing shortage of global energy and the continuous worsening of natural environment, in order to reduce the pollution discharge capacity of urban passenger cars, the development strategy of new energy passenger cars is realized, and the development of electric passenger cars is a current weight, and pure electric passenger cars are also becoming more and more popular.

For the traditional passenger car, the passenger car internal heating in winter utilizes the waste heat of the passenger car engine to recycle and then naturally dissipates heat to the passenger car through the radiator, thereby achieving the problem of the passenger car internal heating in winter. The power source of the pure electric bus is a power battery, and if the heating in the bus is realized in winter, the temperature in the bus must reach the required temperature through a heat pump type air conditioner or an electric heater. At present, an integrated heat pump type air conditioner of a pure electric bus cannot work normally in a winter environment of minus 10 ℃ in the north, and the frequency conversion air conditioner can start to work in time, so that the temperature requirement in the bus cannot be met due to poor heating capacity. With the development of the air conditioning technology of the pure electric passenger car, the integrated variable frequency air conditioner of the pure electric passenger car adopting PTC auxiliary electric heating is adopted in the market, the PTC auxiliary electric heater is completely relied on to work in winter, the air conditioner evaporation fan conveys heat generated by the PTC auxiliary electric heater into the pure electric passenger car through an air conditioner air outlet, air in the electric passenger car is pumped back by the air conditioner evaporation fan to be heated, hot air conveyed into the pure electric passenger car through the air conditioner air outlet in the actual process does not reach the middle position of the car and is pumped back by the air conditioner evaporation fan to be heated again, no heat exists at the bottom of the pure electric passenger car, and meanwhile, heat loss exists in the circulation process of an air conditioner air duct, so that the electric energy of a power battery cannot be converted into heating heat. The air conditioner air outlet is located passenger head position, directly blows the high temperature to passenger head, and the passenger bottom does not have heat, makes the passenger have the discomfort, and pure [ electric ] motor coach integral type variable frequency air conditioner product cost is higher simultaneously, and when pure [ electric ] motor coach does not have the requirement installation air conditioner in northeast, northwest individual district, the interior heating of pure [ electric ] motor coach in winter is unnecessary to select the electric blower product.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a fan heater for a pure electric bus, which comprises the following components:

a housing;

a front panel mounted on one side of the housing; and

a direct current fan and a PTC electric heater installed in the housing;

wherein the top of the shell is provided with an air outlet, and the front panel is provided with an air inlet.

Preferably, the warm-air drier further comprises:

a temperature controller and a high-voltage relay which are arranged in the shell; and

a direct-current high-voltage wire harness and a direct-current low-voltage wire harness electrically connected with a wire harness connector arranged on the front panel;

the direct-current high-voltage wire harness, the high-voltage relay and the PTC electric heater form a direct-current high-voltage power supply loop, and the direct-current low-voltage wire harness, the high-voltage relay, the direct-current fan and the temperature controller form a direct-current low-voltage power supply loop.

Preferably, the housing further comprises:

the first fixing plate is used for fixing the direct-current fan and the high-voltage relay;

and the second fixing plate is used for fixing the PTC electric heater and the temperature controller.

Preferably, the power supply voltage of the direct current high-voltage power supply loop is 350V-750V, and the power supply voltage of the direct current low-voltage power supply loop is 24V.

Preferably, a filter screen is arranged on the inner side of the front panel so as to filter out particulate impurities entering through the air inlet.

Preferably, the filter screen is a nylon filter screen.

Preferably, the PTC electric heater comprises a heat radiation rib, a heating tube and insulating sheaths on both sides, wherein a high-voltage heating wire is installed in the heating tube.

Preferably, the heat dissipation ribs and the heating tube are of an integrated structure.

Preferably, the direct current fan is a direct current cross-flow fan.

Preferably, the air outlet and the air inlet are both in the form of grids.

The fan heater for the pure electric bus has the following beneficial effects:

1. according to the invention, the temperature controller is arranged to control the on-off of the high-voltage relay, namely, when the temperature in the passenger car reaches the set temperature or the temperature controller detects that the surface temperature of the PTC electric heater exceeds the set temperature of the temperature controller, the direct-current low-voltage wire harness is cut off, the high-voltage relay coil is disconnected, the PTC electric heater stops working, and when the temperature controller detects that the surface temperature of the PTC electric heater is lower than the set temperature of the temperature controller, the direct-current low-voltage wire harness is electrified, the high-voltage relay coil is electrified, the PTC electric heater starts heating working, so that the periodic heating of the PTC electric heater is realized, the PTC electric heating is not always in a heating state, the service life of the PTC electric heater is prolonged, and the energy waste is reduced;

2. according to the invention, the nylon filter screen is arranged on the inner side of the front panel, so that dust and pollutants entering through the air inlet of the front panel can be effectively filtered, the dust and pollutants entering along with air are prevented from damaging parts in the shell, and the service life of the whole fan heater is prolonged;

3. compared with the prior art, the fan heater for the pure electric passenger car has the advantages of small volume, high heating efficiency and low cost, can be arranged on the side surface of a carriage seat of the pure electric passenger car, and can directly blow the formed hot air to the bottom of the carriage, so that more comfortableness is provided for passengers. Meanwhile, the heating efficiency of the warm air blower is high, the heat generated by unit power consumption is more, the warm air blower can be conveniently combined to use according to the needs, the power consumption is effectively reduced, and the electric quantity of a power battery of a pure electric motor coach is reduced. The warm air of the pure electric bus also has the advantages of low cost, convenient maintenance and the like.

Drawings

For a better understanding of the present invention, embodiments thereof will be described with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view showing an internal cross-sectional structure of a fan heater for a pure electric bus according to an embodiment of the present invention;

fig. 2 is a partial schematic view of one side of a front panel of a fan heater for a pure electric bus according to an embodiment of the present invention;

FIG. 3 is a partial schematic view of the top of a housing of a fan heater for a purely electric passenger car according to an embodiment of the invention;

fig. 4 is a schematic structural diagram of an integrated high-voltage PTC electric heater for a fan heater for a pure electric bus according to an embodiment of the present invention;

fig. 5 is a schematic diagram of fan heater control for a pure electric bus according to an embodiment of the present invention.

Wherein, 1 is the casing, 2 is direct current fan, 3 is the front panel, 4 is direct current high voltage pencil, 5 is direct current low voltage pencil, 6 is first fixed plate, 7 is PTC electric heater, 8 is PTC second fixed plate, 9 is high voltage relay, 201 is the air intake of front panel, 202 and 203 are respectively corresponding direct current high voltage pencil 4 and direct current low voltage pencil 5's pencil joint, 301 is the air outlet at casing top, 401 is PTC electric heater's heat dissipation muscle, 402 is PTC electric heater's heating tube, 403 is PTC electric heater's insulating sheath, 404 temperature controller, 501 is operating switch.

Detailed Description

The conception, specific structure, and technical effects produced by the present invention will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, aspects, and effects of the present invention. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The same reference numbers will be used throughout the drawings to refer to the same or like parts.

As shown in fig. 1, the pure electric bus of the present invention generally includes: the direct-current fan 2, the first fixed plate 6, the PTC electric heater 7, the second fixed plate 8, the high-voltage relay 9, thefront panel 3, the direct-current high-voltage wire harness 4 and the direct-current low-voltage wire harness 5 are arranged on the shell 1, the direct-current fan 2 and the high-voltage relay 9 are arranged on the first fixed plate 6, the PTC electric heater 7 and the temperature controller 404 (refer to fig. 4) are arranged on the second fixed plate 8, the first fixed plate 6 and the second fixed plate 8 are detachably arranged in the shell 1, and the first fixed plate 6 and the second fixed plate 8 can be fixed in the shell 1 through screws.

Referring to fig. 2-3, which show a partial schematic view of afront panel 3 side of a fan heater for a pure electric bus and a top of a housing 1, according to an embodiment of the present invention, anair inlet 201 and twowire connectors 202 and 203 for connecting a dc high voltage wire harness 4 and a dc low voltage wire harness 5, respectively, are provided on thefront panel 3, and anair outlet 301 is provided on the top of the housing 1, according to a preferred embodiment of the present invention, as shown in fig. 2-3, theair inlet 201 and theair outlet 301 are both provided in a grid form to prevent large objects or contaminants from being sucked into the interior of the housing, thereby causing damage to the internal components of the housing (such as the fan 2). According to a further preferred embodiment of the present invention, a nylon filter screen (not shown in the drawings) is provided at the inner side of thefront panel 3, which can effectively filter smaller dust and foreign materials sucked from theair inlet 201 of thefront panel 3.

According to the embodiment of the invention, the fan heater comprises a direct-current high-voltage power supply loop and a direct-current low-voltage power supply loop, wherein the direct-current high-voltage power supply loop is formed by a direct-current high-voltage wire harness 4, a high-voltage relay 9 and a PTC electric heater 7; the direct current low-voltage wire harness 5, the high-voltage relay 9, the directcurrent fan 2 and thetemperature controller 404 form a direct current low-voltage power supply loop. According to a preferred embodiment of the invention, the supply voltage of the direct current high voltage supply loop is 350V-750V, and the supply voltage of the direct current low voltage supply loop is 24V. When the fan heater for the pure electric bus starts to work, the directcurrent fan 2 sucks air in the carriage of the pure electric bus from theair inlet 201 of thefront panel 3 at the air inlet side A (refer to figures 1 and 2), the air is filtered by the nylon filter screen at the inner side of thefront panel 3 and then enters the directcurrent fan 2, the filtered air is sent to the air outlet of the first fixing plate 6 by centrifugal force and then is heated by the PTC electric heater 7, and the heated air is sent into the carriage of the pure electric bus through theair outlet 301 at the top of the shell 1 at the air outlet side B (refer to figures 1, 2 and 4), so that the heating cycle of the air in the carriage of the pure electric bus is formed.

According to one embodiment of the invention, the warm air blower can be arranged on the side surface of a carriage seat of a pure electric bus, and the formed hot air is directly blown to the bottom of the carriage, so that more comfort is provided for passengers.

Referring now to fig. 4, a schematic structural diagram of an integrated high-voltage PTC electric heater for a fan heater for a pure electric bus according to an embodiment of the present invention is shown. According to the preferred embodiment of the invention, the PTC electric heater consists of aheat radiation rib 401, aheating tube 402 and insulatingjackets 403 on two sides, and atemperature controller 404 is arranged on the side surface of theheat radiation rib 401 of the PTC electric heater 7. Theheating tube 402 is internally provided with a high-voltage electric heating wire, and when the electric heating wire works, heat is transmitted into a passenger car through theheating tube 402 and theheat dissipation ribs 401 by radiation. According to the preferred embodiment of the present invention, the PTC electric heater 7 is an integrated electric heater, i.e., theheat dissipation rib 401 and theheat generation pipe 402 are in an integrated structure.

Referring now to fig. 5, a control schematic diagram of a fan heater for a purely electric passenger car according to an embodiment of the invention is shown. According to the preferred embodiment of the invention, when the fan heater for the electric passenger car is in butt joint with the corresponding wire harness of the whole car, a driver gives a fan heater starting signal for the electric passenger car through theoperation switch 501, and at the moment, the coils of the directcurrent fan 2 and thehigh voltage relay 9 are powered on, the directcurrent fan 2 starts to work, and the PTC electric heater 7 starts to heat. According to the preferred embodiment of the invention, the directcurrent fan 2 adopts a direct current through-flow fan, and has the characteristics of low noise and long service life. When the temperature in the passenger car reaches the set temperature or thetemperature controller 404 detects that the surface temperature of the PTC electric heater 7 exceeds the set temperature of thetemperature controller 404, the direct-current low-voltage wire harness 5 is cut off, the coil of the high-voltage relay 9 is disconnected, and the PTC electric heater 7 stops working. However, when thetemperature controller 404 detects that the surface temperature of the PTC electric heater 7 is lower than the set temperature of thetemperature controller 404, the direct-current low-voltage wire harness 5 is electrified, the coil of the high-voltage relay 9 is electrified, and the PTC electric heater 7 starts the heating work.

While the preferred embodiment of the present invention has been described in detail, the invention is not limited to the embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the invention, and these equivalent modifications and substitutions are intended to be included in the scope of the present invention as defined in the appended claims.

Claims (8)

1. Warm-air drier for pure electric passenger train, its characterized in that includes:

a housing (1);

a front panel (3) mounted on one side of the housing (1);

a direct current fan (2) and a PTC electric heater (7) which are arranged in the shell (1);

wherein an air outlet (301) is formed in the top of the shell (1), and an air inlet (201) is formed in the front panel (3);

wherein, a filter screen is arranged on the inner side of the front panel (3) to filter out the particulate impurities entering through the air inlet (201);

wherein the filter screen is a nylon filter screen;

the direct current fan (2) is with the air in the pure [ electric ] motor coach carriage from air inlet side A air intake (201) of front panel (3) is inhaled, and is passed through behind the nylon filter screen of front panel (3) inboard get into in direct current fan (2), send air after filtering to air outlet (301) of first fixed plate (6) through centrifugal force again pass through PTC electric heater (7) heats, and air after the heating rethread is in air outlet (301) at air-out side B casing (1) top in the coach carriage, forms the heating cycle of air in the pure [ electric ] motor coach carriage.

2. The fan heater for a pure electric bus according to claim 1, further comprising:

a temperature controller (404) and a high-voltage relay (9) which are arranged in the shell (1); and

a DC high-voltage harness (4) and a DC low-voltage harness (5) electrically connected to harness joints (202, 203) provided on the front panel (3);

the direct-current high-voltage power supply circuit is composed of a direct-current high-voltage wire harness (4), a high-voltage relay (9) and a PTC electric heater (7), and the direct-current low-voltage wire harness (5), the high-voltage relay (9), the direct-current fan (2) and the temperature controller (404).

3. Fan heater for electric passenger vehicles according to claim 2, characterized in that the housing (1) further comprises:

the first fixing plate (6) is used for fixing the direct-current fan (2) and the high-voltage relay (9);

and the second fixing plate (8) is used for fixing the PTC electric heater (7) and the temperature controller (404).

4. Fan heater for a pure electric bus according to claim 2, characterized in that the supply voltage of the dc high voltage supply circuit is 350V-750V and the supply voltage of the dc low voltage supply circuit is 24V.

5. The fan heater for a pure electric bus according to claim 1, wherein the PTC electric heater (7) comprises a heat radiation rib (401), a heating tube (402) and insulation sheaths (403) on two sides, wherein a high-voltage heating wire is installed in the heating tube (402).

6. Fan heater for a pure electric bus according to claim 5, characterized in that the heat radiation ribs (401) and the heat generating tube (402) are of an integrated structure.

7. Fan heater for electric passenger car according to claim 1, wherein the direct current fan (2) is a direct current through-flow fan.

8. Fan heater for a pure electric bus according to any of claims 1-7, characterized in that the air outlet (301) and the air inlet (201) are both in the form of a grille.

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