CN217259496U

CN217259496U - Auxiliary heating system for automobile air conditioner

Info

Publication number: CN217259496U
Application number: CN202123439160.0U
Authority: CN
Inventors: 孟天晨; 王兴祖; 韩天成; 孙乙力
Original assignee: SAIC Maxus Vehicle Co Ltd
Current assignee: SAIC Maxus Vehicle Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-08-23
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to an automobile air conditioner auxiliary heating system, including air conditioner assembly, air conditioner assembly includes air conditioner controller, evaporimeter core, warm braw core, is equipped with the low pressure PTC that the maximum power for secondary heating is 750W in air conditioner assembly, low pressure PTC arranges on the flow path of the air that is heated through the warm braw core in the warm braw core back passage, the utility model discloses with low costs effectively promotes the temperature rise of fuel truck, defrosting defogging performance, and convenient to implement need not whole car and arranges alone, practices thrift the space; the air conditioner controller collects the external temperature and the water temperature through the CAN on the original vehicle, the low-voltage PTC is matched with the electric balance of the whole vehicle, different rated powers and gear division CAN be selected, the low-voltage PTC gear is automatically controlled, manual operation is not needed, the performance requirements of client heating and defrosting and demisting are well met, and particularly under the working condition of northern areas or idling.

Description

Auxiliary heating system for automobile air conditioner

Technical Field

The utility model relates to a fuel vehicle air conditioning system is a vehicle air conditioner low pressure PTC auxiliary heating system very much.

Background

The function of heating of traditional fuel vehicle air conditioning system carries out the heat exchange through engine coolant liquid through the warm braw core and realizes, nevertheless because the surplus heat of motorcycle type engine is little for some, the coolant liquid temperature is low, like the diesel vehicle of part design input, under this condition, can't satisfy the performance requirement of customer heating and defrosting defogging, and this problem is especially serious under northern area or idle operating mode. In the industry, the solutions of the current whole car factory mainly include re-matching development systems, installing parking heaters, electric glass heating and the like, and the several methods all have respective advantages and disadvantages, such as: the development system is matched again, so that the requirements of temperature rise and defrosting and demisting performances can be met; the defects that an engine, a calibration system, a cooling system and an air conditioning and heating system need to be matched and developed again, the change range is large, the engine is generally used for a new generation of vehicle models, the cost investment is high, and the development period is long; the parking heater is additionally arranged, so that the parking heater has the advantages that the engine cooling liquid is heated to increase the water temperature, and the temperature rise, defrosting and demisting performances are obviously improved; the disadvantage is that the arrangement requires a large space; fuel oil is consumed, and an oil way and a water way are independently developed; the unit price is expensive, and the cost per vehicle is increased by 2500-; the defrosting and demisting performances of the scheme of electrically heating the glass are obviously improved; but does not contribute to the temperature rise performance and the unit price is expensive, and the cost of a single vehicle is increased by about 500 yuan; PTC is as new heat-sensitive material, and high-pressure PTC (5 kW) heating is applied to the electric motor car, and the unpowered battery of the traditional fuel oil vehicle cannot be used.

In view of this, it is a goal of those skilled in the art to improve the temperature rise and defrosting and defogging performance while satisfying the requirements of reasonable installation space and minimum cost.

Disclosure of Invention

The utility model aims at solving the above-mentioned defect of prior art, utilize PTC thermistor's characteristic, provide a vehicle air conditioner low pressure PTC auxiliary heating system for fuel automobile HVAC air conditioning is unified.

In order to realize the purpose, the utility model adopts the following technical scheme:

the utility model provides an automobile air conditioner auxiliary heating system, is including air conditioner assembly, and air conditioner assembly includes air conditioner casing, air conditioner controller, still includes evaporimeter core, warm braw core, is equipped with the low pressure PTC that the maximum power that secondary heating used is 750W in air conditioner assembly, low pressure PTC arranges on the flow path of the air that the warm braw core back pass was after the warm braw core heating promptly.

Further, the air conditioner controller is connected with the low-voltage PTC through a hard wire, the signal input end of the low-voltage PTC controlled by the air conditioner controller is an external temperature sensor or an engine water temperature sensor, the signal output end of the low-voltage PTC controlled by the air conditioner controller is a driving relay connected with the low-voltage PTC input end in series, and the air conditioner controller outputs a corresponding low-level signal through the driving relay to trigger and be connected to a corresponding low-voltage PTC heating sheet.

Further, when the signal input end of the air conditioner controller for controlling the low-voltage PTC is an external temperature sensor, and the external temperature is more than or equal to 5 ℃, the low-voltage PTC is a disconnection station; when the external temperature is less than or equal to 0 ℃, the low-voltage PTC is a closed station, and the air conditioner controller is triggered and connected with the low-voltage PTC heating plate through a low-level signal output end of a driving relay connected in series in a circuit.

Further, when the signal input end of the air conditioner controller for controlling the low-voltage PTC is an engine water temperature sensor, and when the engine water temperature is more than or equal to 70 ℃, the low-voltage PTC is a disconnection station; when the water temperature of the engine is less than or equal to 65 ℃, the low-voltage PTC is a closed station, and the air conditioner controller is triggered and connected with the low-voltage PTC heating plate through a low-level signal output end of a driving relay connected in series in the circuit.

Further, the air conditioner controller outputs multi-level low-level signals to a plurality of groups of low-voltage PTC corresponding to the multi-level low-level signals in a grading manner by connecting a plurality of groups of driving relays, and the multi-level low-level signals are connected to the low-voltage PTC to trigger the low-voltage PTC heating pieces.

Further, the multi-level low-level signal corresponds to power of 250W, 500W and 750W.

Further, the air conditioner controller is electrically connected with the corresponding PTC1, PTC2 and PTC3 through three groups of corresponding driving RELAYs MICRO-RELAY (35A).

Further, a fuse of 85A or more is mounted on the PTC bus.

Further, the A/C function switch and the A/C function switch are mutually exclusive.

Further, the low-voltage PTC is arranged in the front air-conditioning assembly, the lower part of the warm air core body is fixed on the air-conditioning shell through a connecting piece, one surface of a mounting surface, which is in contact with the air-conditioning shell, of the low-voltage PTC is provided with a sealing groove, the sealing groove is in concave-convex fit sealing connection with a sealing rib on the air-conditioning shell, and the head of the sealing rib is parallel to the bottom of the sealing groove; the other side is provided with a guide post which is matched with a groove on the air conditioner shell, sponge is filled in a gap of a matching interface of the guide post and the groove, and a wiring harness installation groove of low-voltage PTC is arranged on the air conditioner shell.

The utility model discloses possess following beneficial effect at least: the utility model discloses the low pressure PTC scheme is with low costs, effectively promotes the fuel car temperature rise, defrosting defogging performance, and the air outlet temperature can improve 8 ℃; the low-voltage PTC is installed in the air conditioner assembly for integrated supply, so that the implementation is convenient, the independent arrangement of the whole vehicle is not needed, and the space is saved; the air conditioner controller collects the external temperature and the water temperature through a CAN on the original vehicle, the low-voltage PTC is matched with the electric balance of the whole vehicle, different rated powers and gear division CAN be selected, the low-voltage PTC gear is automatically controlled, manual operation is not needed, and in the low-voltage PTC control strategy, if the original air conditioner controller does not have a CAN chip, data CAN be collected through arranging an external temperature sensor and a water temperature sensor to realize control; the novel energy-saving air conditioner has practicability, well meets the performance requirements of client heating and defrosting and demisting, and is especially suitable for northern areas or under idling conditions.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

The present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a low voltage PTC layout digifax of the utility model;

fig. 2 is a schematic view of the low-voltage PTC arrangement of the present invention;

FIG. 3 is a schematic structural view of a low-voltage PTC mounting surface of the present invention;

fig. 4 is another schematic structural view of the low-voltage PTC mounting surface of the present invention;

FIG. 5 is a schematic diagram of the electrical principle of the low-voltage PTC control of the present invention;

FIG. 6 is a schematic diagram of the external temperature control strategy of the present invention;

FIG. 7 is a schematic diagram of the water temperature control strategy of the present invention;

fig. 8 is a schematic diagram illustrating an electrical principle of the low-voltage PTC control according to the present invention;

in the figure: an evaporator core; 2. a warm air core body; 3. a low voltage PTC; 4. a low voltage PTC wire harness; 5. a sealing groove; 6. sealing the ribs; 7. a bolt; 8. a guide post; 9. an air conditioner housing recess; 10. a sponge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1 and fig. 2, the present invention adds a set of auxiliary heating system in the original air conditioning assembly of the fuel automobile, and in the actual application, it is not necessary to newly develop an air conditioner, and it is only necessary to add an installation structure according to the type-selected PTC; the method comprises the following steps of carrying out an adaptive change scheme on the existing air conditioner assembly: the air conditioner assembly comprises an air conditioner shell, an air conditioner controller, an evaporator core body (1) and a warm air core body (2), wherein a low-voltage PTC (3) with the maximum power of 750W for secondary heating is arranged in the air conditioner assembly, and the low-voltage PTC (3) is arranged in the air conditioner assembly and is positioned on the flow path of air heated by the warm air core body (2) at the rear way of the warm air core body (2); the low-voltage PTC (3) carries out secondary heating on the air heated by the warm air core body (2) so as to meet the performance requirements of temperature rise, defrosting and demisting of the whole vehicle.

As shown in fig. 3 and 4, a common low-voltage PTC (3) is arranged in a front air-conditioning assembly, a mold is repaired on the air-conditioning shell below a warm air core body (2) through a connecting piece bolt (7), a sealing groove (5) is arranged on one surface of a mounting surface of the low-voltage PTC (3) contacted with the air-conditioning shell, the sealing groove (5) is in concave-convex matching sealing connection with a sealing rib (6) on the air-conditioning shell, and the head part of the sealing rib is parallel to the bottom of the sealing groove; the other side is provided with a guide post (8) which is matched with a groove (9) on the air-conditioning shell, the gap of the matched interface can be filled with sponge (10), and the air-conditioning shell is provided with a wire harness installation groove of low-voltage PTC for installing PTC wire harnesses (4).

As shown in fig. 5, in the low-voltage PTC (3) control strategy, the type selection of the low-voltage PTC (3) mainly considers the heating performance and the electric balance of the whole vehicle, and the low-voltage PTC (3) can select different rated powers and gear divisions by matching with the electric balance of the whole vehicle, such as: the air conditioner controller is connected with a plurality of MICRO-RELAYs MICRO-RELAY (35A) to serve as driving RELAYs, outputs multi-level low-level signals to a plurality of groups of low-voltage PTC (3) corresponding to the multi-level low-level signals in a grading mode, is connected to the low-voltage PTC (3) to trigger the low-voltage PTC (3) heating sheet, and can have the corresponding power of the multi-level low-level signals of 250W, 500W and 750W. For the air conditioner controller of the CAN on the original vehicle, the water temperature and the external temperature CAN be directly adopted for controlling, and secondary development is not needed; if the original air conditioner controller does not have a CAN chip, the control CAN be realized by arranging an external temperature sensor and a water temperature sensor to acquire data; the air conditioner controller is connected with the low-voltage PTC (3) through a hard wire, the signal input end of the low-voltage PTC (3) controlled by the air conditioner controller is an external temperature sensor or an engine water temperature sensor, the signal output end of the low-voltage PTC (3) controlled by the air conditioner controller is a driving relay connected with the input end of the low-voltage PTC (3) in series, the air conditioner controller outputs corresponding low-level signals through the driving relay to trigger and be connected to a corresponding low-voltage PTC (3) heating sheet for heating, the auxiliary heating function is achieved, and a fuse larger than or equal to 85A is installed on a PTC main circuit. It is important to note that when the auxiliary heating function is on, the a/C function switches are off and they are connected exclusively.

As shown in fig. 6, PTC gear start control is performed according to external temperature, and the air conditioner panel controls the auxiliary heating system through a hard wire; the control logic that allows the auxiliary heating to be turned on is: when the air conditioner controller controls the signal input end of the low-voltage PTC (3) to be an external temperature sensor, when the external temperature is more than or equal to 5 ℃, the auxiliary heating is not allowed to be started, and the low-voltage PTC (3) is a disconnection station; when the external temperature is less than or equal to 0 ℃, the low-voltage PTC (3) is a closed station, and the auxiliary heating is allowed to be started; the air conditioner controller is connected with a low-voltage PTC (3) heating sheet for heating through triggering of a low-level signal output end of a driving relay connected in series in a circuit, and the auxiliary heating function is achieved.

As shown in fig. 7, PTC gear start control is performed according to the current engine water temperature; the control logic that allows the auxiliary heating to be turned on is: when the air conditioner controller controls the signal input end of the low-voltage PTC (3) to be an engine water temperature sensor, and when the engine water temperature is more than or equal to 70 ℃, the low-voltage PTC (3) is a disconnection station, and the auxiliary heating is not allowed to be started; when the water temperature of the engine is less than or equal to 65 ℃, the low-voltage PTC (3) is a closed station, the auxiliary heating is allowed to be started, and the air conditioner controller is connected with a low-voltage PTC (3) heating sheet for heating through the triggering of a low-level signal output end of a driving relay connected in series in a circuit, so that the auxiliary heating function is realized.

As shown in fig. 8, the air conditioner controller is electrically connected to the corresponding low voltage PTC1, low voltage PTC2 and low voltage PTC3 through three sets of corresponding driving RELAYs MICRO-RELAY (35A). Low-voltage PTC control scheme: the low-voltage PTC is converted into a corresponding control low level of three gears by the air conditioner controller according to a customer instruction, and different PTC heating sheets are driven to work by three groups of different relays;

1-gear drive relay PTC 1250W

2-gear driving relay PTC1+ PTC 2500 w

3-gear driving relay PTC1+ PTC2+ PTC 3750 w

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a vehicle air conditioner auxiliary heating system, is including air conditioner assembly, and air conditioner assembly includes air conditioner casing, air conditioner controller, still including evaporimeter core (1), warm braw core (2), its characterized in that: a low-voltage PTC (3) with the maximum power of 750W for secondary heating is arranged in the air conditioning assembly, and the low-voltage PTC (3) is arranged on the flow path of air heated by the warm air core body (2) at the back of the warm air core body (2).

2. The auxiliary heating system of the automobile air conditioner as claimed in claim 1, wherein the air conditioner controller is connected with the low-voltage PTC (3) through a hard wire, the signal input end of the air conditioner controller controlling the low-voltage PTC (3) is an external temperature sensor or an engine water temperature sensor, the signal output end of the air conditioner controller controlling the low-voltage PTC (3) is a driving relay connected in series with the input end of the low-voltage PTC (3), and the air conditioner controller outputs a corresponding low-level signal through the driving relay to trigger and be connected to a corresponding low-voltage PTC (3) heating plate.

3. The auxiliary heating system of the automobile air conditioner as claimed in claim 2, wherein when the signal input end of the air conditioner controller controlling the low-voltage PTC (3) is an external temperature sensor, the low-voltage PTC (3) is a disconnection station when the external temperature is greater than or equal to 5 ℃; when the external temperature is less than or equal to 0 ℃, the low-voltage PTC (3) is a closed station, and the air conditioner controller is connected with the low-voltage PTC (3) heating sheet in a triggering manner through a low level signal output end of a driving relay connected in series in a circuit.

4. The auxiliary heating system of the automobile air conditioner as claimed in claim 2, wherein when the signal input end of the air conditioner controller for controlling the low-voltage PTC (3) is an engine water temperature sensor, when the engine water temperature is greater than or equal to 70 ℃, the low-voltage PTC (3) is a disconnection station; when the water temperature of the engine is less than or equal to 65 ℃, the low-voltage PTC (3) is a closed station, and the air conditioner controller is connected with the low-voltage PTC (3) heating sheet in a triggering mode through a low level signal output end of a driving relay connected in series in the circuit.

5. The auxiliary heating system for the air conditioner of the automobile as claimed in claim 3 or 4, wherein the air conditioner controller outputs multi-level low level signals to the corresponding plurality of groups of low-voltage PTC (3) in a stepping way by connecting a plurality of groups of driving relays, and is connected to the low-voltage PTC (3) to trigger the heating sheet of the low-voltage PTC (3).

6. An auxiliary heating system for air conditioner of car as claimed in claim 5, wherein said multi-level low level signal corresponds to power of 250W, 500W, 750W.

7. The auxiliary heating system for air conditioner of car as claimed in claim 6, wherein the air conditioner controller is electrically connected with the corresponding PTC1, PTC2 and PTC3 through three sets of corresponding driving RELAYs MICRO-RELAY (35A).

8. An auxiliary heating system for air conditioners in automobiles as claimed in claim 1 or 2 wherein the PTC main is installed with a fuse of 85A or more.

9. An auxiliary heating system for air conditioner of car as claimed in claim 1 or 2, characterized in that it is connected with A/C function switch in mutual exclusion way.

10. The auxiliary heating system of the automobile air conditioner is characterized in that the low-voltage PTC (3) is arranged in the front air conditioner assembly, the lower part of the warm air core body (2) is fixed on an air conditioner shell through a connecting piece, one surface of a mounting surface, which is in contact with the air conditioner shell, of the low-voltage PTC (3) is provided with a sealing groove (5), the sealing groove (5) is in concave-convex fit sealing connection with a sealing rib (6) on the air conditioner shell, and the head part of the sealing rib is parallel to the bottom of the sealing groove; the other side is provided with a guide post (8) which is matched with a groove (9) on the air-conditioning shell, the matching interface of the guide post is filled with sponge (10), and the air-conditioning shell is provided with a wire harness installation groove (4) of low-voltage PTC.