DE102018121528A1 - Heating / air conditioning unit for a motor vehicle - Google Patents

Abstract

The heating / air conditioning unit (1) according to the invention has an evaporator (11), through which the air at the entrance to the heating / air conditioning unit (1) is guided and cools the air and dehumidifies. Above the evaporator (11), a defrost outlet (2) is arranged. Preferably, this is directed obliquely forward in the installed state. Adjacent to the defrost outlet (2), ie in the installed state under the defrost outlet (2) at least a first outlet to the dashboard is arranged. This at least one first outlet to the dashboard is thus arranged between the evaporator (11) and the defrost outlet (2). At least one further outlet to the instrument panel is arranged such that the defrost outlet (2) is located between the at least one first outlet to the instrument panel and the at least one further outlet to the instrument panel.
According to the invention, a dividing wall (7) is arranged between the defrost outlet (2) and the at least one first outlet for the dashboard. The partition (7) protrudes into the outlet of the hot air duct and is continued until the spatial separation of Defrost outlet (2) and at least a first outlet for the dashboard. Last but not least, the heating / air conditioning unit (1) has an over the evaporator (11) and on both sides of the hot air duct arranged air guide (6). The air guide element (6) prevents that from the evaporator (11) on the cold air path (91) incoming air can flow directly into the defrost outlet (2). The rising cold air is directed through the spoiler (6) either to the at least one first dashboard outlet or the at least one other dashboard outlet.

Description

The invention relates to a heating / air conditioning unit for a motor vehicle.

Automotive heating / air conditioning systems increasingly include three or four zones to allow all vehicle occupants to individually adjust the seat temperature. From a blower arranged in the heating / air conditioning unit, an air mass flow is conveyed into and through the heating / air conditioning unit. When overflowing the heat transfer surface of an evaporator of a refrigerant circuit, the air mass flow is dehumidified and / or cooled. Subsequently, the air mass flow can be divided into a cold air path and a hot air path. Here, the guided through the hot air path partial air mass flow over the heat transfer surface of a Heizwärmeübertragers is performed, which is formed for example in conventional air conditioning systems of motor vehicles with internal combustion engine drive as coupled to a coolant circuit of the internal combustion engine heat exchanger. The hot air stream flowing out of the heating heat exchanger and the cold air stream flowing out of the evaporator and conducted through the cold air path are combined in a mixing chamber under a certain adjustable mixing ratio and thus the temperature of the supply air for the passenger compartment is adjusted.

For multi-zone heating / air conditioning units, also referred to as multi-zone heating / air conditioning units, a mixing chamber is provided for each zone in order to ensure a customizable mixing ratio of hot air flow and cold air flow.

For the air conditioning of the various zones, a heating / air conditioning unit has several outlets. A so-called defrost outlet, which is directed at the top of most heating / air conditioning units at the front, ie in the installed state to the top and by means of a defrost function, the entire available warm air of the heating / air conditioning unit leads to the windscreen. Further outlets are provided for exhaust nozzles in the dashboard side, center and for indirect ventilation. In known heating / air conditioning units, the outlets for this ventilation in the dashboard are positioned at the rear in the direction of the interior. Since all outlets for the dashboard are to be subjected to the same temperature, this arrangement of the outlets is also technically easy to implement. Further outlets for the air conditioning of the rear zones are arranged on the underside of the heating / air conditioning unit.
Such an arrangement of the outlets is for example in the US 7,013,967 B2 described.

For certain vehicles, however, the configuration described above is technically difficult to integrate into the vehicle. Thus, for some vehicles, it is desirable to position the outlets on the dashboard side air conditioner heater / air conditioner so that the defrost outlet between the outlets faces the dashboard side and the dashboard center outlets and the indirect vent. The problem with this arrangement is that the temperature level of the defrost outlet is significantly higher than that of the dashboard outlets, but must be guided along with these arrangement between these outlets.

The object of the invention is to propose a heating / air conditioning unit with the above-described arrangement of the outlets.

The object is achieved by an article having the features according to patent claim 1. Further developments are specified in the dependent claims.

The heating / air conditioning unit according to the invention has an evaporator, through which the air is guided at the entrance to the heating / air conditioning unit and which cools and dehumidifies the air. Above the evaporator, a defrost outlet is located. Preferably, this is directed obliquely forward in the installed state. Adjacent to the defrost outlet, so in the installed state under the defrost outlet at least a first outlet to the dashboard is arranged. This at least one first outlet to the dashboard is thus arranged between the evaporator and the defrost outlet. At least one further outlet to the instrument panel is arranged so that the defrost outlet is between the at least one first outlet to the instrument panel and the at least one further outlet to the instrument panel.

The at least one first outlet to the instrument panel may be an outlet, but preferably it is two adjacent outlets from two different zones.

Furthermore, the heating / air conditioning unit has a bottom heating heat exchanger. This is preferably arranged so that the air is passed to the evaporator either via a cold air pad on the heating heat exchanger or a warm air path through it for heating.

The heater / air conditioner has a hot air duct which is arranged to receive the warm air from the heat exchanger and lead to the entrances of the defrost outlet and the first outlet for the dashboard, respectively.

According to the invention, a partition wall is arranged between the defrost outlet and the at least one first outlet for the dashboard. The partition protrudes into the outlet of the hot air duct and is continued until the spatial separation of Defrost outlet and at least a first outlet for the dashboard. Thus, the partition may divide the stream of hot air from the hot air duct between the defrost outlet and the at least one first outlet for the instrument panel.

In a preferred embodiment, the partition is doing a part of the hot air duct or the housing of the heating / air conditioning unit, depending on which design manufacturing technology makes more sense.

Not least, the heating / air conditioning unit has an over the evaporator and on both sides of the hot air duct arranged air guide. The air guide prevents it from the evaporator on the cold air path incoming air can flow directly into the defrost outlet. The rising cold air is directed by the spoiler either to the at least one first dashboard outlet or the at least one other dashboard outlet.

Advantageously, such a heating / air conditioning unit is provided that has the desired arrangement of the outlets and these outlets can also temper as desired, namely the Defrost outlet to supply the maximum available hot air flow and the dashboard outlets an air flow at the set temperature ,

In a preferred embodiment, the air guide extends over the entire width of the heating / air conditioning unit. Advantageously, such a passage of cold air into the defrost outlet and into the at least one first outlet for the dashboard can be well prevented, especially at small opening angles of the cold air flap. The air guide element thus prevents a flow of cold air above the outlet flap of the cold air path.

Further preferably, the at least one first outlet for the instrument panel is at least one outlet to the side of the dashboard. Particularly preferred are two outlets to the side of the dashboard, since in most heating / air conditioning units, the front seats are supplied with different tempered air, so belong to different zones.

Further preferably, the at least one further outlet for the dashboard is at least one outlet for the center of the dashboard and / or an outlet for the indirect ventilation of the dashboard. Here too, two outlets are particularly preferred since the front seats are usually supplied with differently tempered air, that is, belong to different zones of the heating / air conditioning unit.

Further preferably, the air guide is curved. The curvature is directed towards the incoming cold air, ie in the direction of the cold air damper of the cold air path of the heating / air conditioning unit, which leads over the heating heat exchanger along. Due to the curvature, the cold air can be diverted particularly well.

In a further preferred embodiment, the air guide element is part of the hot air duct or part of the housing of the heating / air conditioning unit. This design is particularly easy to manufacture and therefore inexpensive.

Further preferably, the partition extends to the sides of the housing of the heating / air conditioning unit. Thus, the separation of the air streams to the defrost outlet or to the at least one first outlet for the dashboard is particularly well separated and a violation of air in the edge zones can be prevented.

In a particularly preferred embodiment, a part of the cold air path of the heating / air conditioning unit penetrates the hot air duct. In this case, several openings are provided in the area of the penetration, which allow an exchange of air. Particularly preferably, the stream of hot air is passed through a plurality of juxtaposed nozzles, in whose side walls at least partially openings, preferably slots are arranged through which the cold air can penetrate into the stream of hot air. An advantage of this design is a good response of the temperature control in all positions of the temperature flaps. Another part of the cold air path is passed through cold air ducts and between the nozzles on the hot air flow.

• 1: eine Schnittdarstellung eines erfindungsgemäßen Heiz-/Klimagerätes,
• 2: eine perspektivische Schnittdarstellung des Warmluftkanals,
• 3: eine größere perspektivische Schnittdarstellung des Warmluftkanals,
• 4: eine Darstellung des Warmluftkanals mit Luftleitelement,
• 5: eine Darstellung der Luftwege des Heiz-/Klimagerätes, und
• 6: eine Darstellung des Durchdringungsbereiches von Kaltluft- und Warmluftpfad.

Further details, features and advantages of embodiments of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings. Show it:

• 1 : a sectional view of a heating / air conditioning unit according to the invention,
• 2 a perspective sectional view of the hot air duct,
• 3 a larger perspective sectional view of the hot air duct,
• 4 : a representation of the hot air duct with air guide element,
• 5 : a representation of the airways of the heating / air conditioning unit, and
• 6 : a representation of the penetration range of cold air and warm air path.

1 shows a sectional view of a heating / air conditioning unit according to the invention 1 , On the air inlet side has the heater / air conditioner 1 an evaporator 11 in which the incoming air is cooled and dehumidified. After the evaporator 11 is a heating heat exchanger 12 arranged through the top of the warm air path 8th leading to the front area, at the entrance of a hot air flap 15 is arranged for the front area. Above the heating heat exchanger 12 there is a cold air flap 14 for the front area, through the cold air over the heating heat exchanger 12 to be led. Under the hot air flap 15 there is a temperature door 52 for a rear zone. The temperature door 52 divides the incoming airflow into a stream of hot air passing through the heat exchanger 12 is guided, and a cold air flow, which is under the heating heat exchanger 12 to be led. Both air streams are through a path partition 53 separated. Under the heating heat exchanger 12 is the outlet 5 for the rear zones. The outlet 5 for the rear zones has four outlet doors, one each for the foot and the ventilation outlet on each side. To the hot air flow, which after the heating heat exchanger 12 undergoes a 180 ° deflection and then back under the heating heat exchanger 12 is well, and to mix the coming from the opposite direction cold air flow well and to prevent stratification of warm air and cold air, is above the outlet 5 in the collision area of hot air and cold air a mixed wall 51 arranged, both airflows in the outlet 5 forces.

The area behind the heating heat exchanger 12 is separated by a ShutOff door 13 in an upper and lower area, the lower portion of the rear outlet 5 is available. For the defrost function, the shut-off door 13 is opened and all available hot air through a defrost outlet 2 who has a defrost out door 21 has led to the windscreen. Furthermore, the heating / air conditioning unit 1 Outlets for the front foot wells 4 , These have an outlet door 42 and additionally in the hot air stream 8th an air layering flap 41 , via the extra warm air to the outlets 4 can be performed for the front foot wells to a temperature stratification between the front Fußraumauslässen 4 and outlets 33 . 32 . 31 in the dashboard.

Above the heating heat exchanger 12 closes a warm air duct 85 on, in the side of the from the cold air flap 14 coming cold air in an entrance area 9 entry. The entrance area 9 is in 6 shown closer. Under the defrost outlet 2 is an outlet 31 to the side of the dashboard with an outlet door 311 arranged to the side of the dashboard. The air escaping there is led to the side outlets in the dashboard. In addition, the heating / air conditioning unit has 1 an outlet 33 for the dashboard center, with an outlet door 331 to the dashboard center. Between the outlet 33 to the dashboard center and the defrost outlet 2 is still an outlet 32 for indirect ventilation of the dashboard with an outlet door 321 arranged for the indirect ventilation of the dashboard.

Because the defrost outlet 2 and the outlet 31 are directly adjacent to the side of the dashboard is a partition 7 provided by the area between the outlets 2 . 31 up to the place in the heating / air conditioning unit 1 is continued, where defrost outlet 2 and outlet 31 to the side of the dashboard are spatially and structurally separated. Because the defrost outlet 2 and the outlet 31 To the side of the dashboard are positioned directly above the evaporator, is an air guide 6 on both sides of the warm air duct 85 provided that prevents cold air directly into the defrost outlet 2 and / or the outlet 31 flows to the side of the dashboard.

2 is a perspective sectional view of the heating / air conditioning unit according to the invention 1 , The from the heating heat exchanger 12 incoming hot air flow 8th gets into the warm air duct 85 guided. After the entrance area 9 the cold air begins the partition wall 7 that the defrost outlet 2 and the outlet 31 separates to the side of the dashboard.

3 also shows a perspective sectional view of the heating / air conditioning unit according to the invention 1 in another cutting plane. The air guide 6 on both sides of the hot air duct 85 is arranged, extending over the entire width of the heating / air conditioning unit 1 ,

4 shows the presentation 3 with other cutting plane. Very well recognizable is the air guide 6 ,

5 shows the airways of the heating / air conditioning unit 1 again more exactly. The hot air duct coming from below 85 with the entry area for the cold air 9 leads to the top of the defrost outlet 2 and the outlet 31 to the side of the dashboard. The partition 7 separates both outlets. The air guide 6 blocks the direct path of cold air to the defrost outlet 2 and the outlet 31 to the side of the dashboard. Down side are cold air channels 94 arranged to the front foot wells forward.

6 shows a closer view of the entrance area 9 the cold air into the warm air duct 85 , In the 6 becomes the hot air flow 8th from the bottom in the entrance area 9 guided, with the hot air flow 8th in this area through several nozzles 86 to be led. The cold air path 91 meets laterally, in the 6 from behind on the nozzles. Through openings 82 in a sidewall 81 of the hot air duct 85 enters cold air and mixes with the hot air flow 8th to mixed air 87 , However, the openings are not in all nozzles 86 intended.

LIST OF REFERENCE NUMBERS

1

Heater / air conditioner

11

Evaporator

12

Heating exchangers

13

Shutoff Door

14

Cold air flap for the front area

15

Hot air flap for the front area

2

Defrost outlet

21

Defrost outlet door

31

Outlet to the side of the dashboard

311

Outlet door to the side of the dashboard

32

Outlet for the indirect ventilation of the dashboard

321

Outlet door for indirect ventilation of the dashboard

33

Outlet to the dashboard center

331

Discharge door to the dashboard center

4

Outlet for a front footwell

41

Air stratification flap

42

Outlet door for a front footwell

5

Outlet for a rear zone

51

mixed wall

52

Temperature door for a rear zone

53

path partition

6

air guide

7

partition wall

8th

Warm air path, warm air flow

81

Side wall of a warm air duct

82

Opening of the hot air duct

85

Warm air duct

86

Nozzles of the hot air duct

87

mixed air

9

Entry area of cold air

91

Cold air path

94

Cold air duct to a front footwell

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 7013967 B2 [0004]

Claims (9)

Heating / air conditioning unit (1) comprising: an evaporator (11), a defrost outlet (2) arranged above the evaporator (11), at least one at least one first outlet for the dashboard, arranged between evaporator (11) and defrost outlet (2), at least one further outlet for the instrument panel being arranged such that the defrost outlet (2) is arranged between the first outlet for the dashboard and the at least one further outlet for the dashboard, a heating heat exchanger (12) arranged on the bottom, a warm air duct (85) connecting the area above the heating heat exchanger (12) and the defrost outlet (2) or first dashboard outlet, - A arranged between the defrost outlet (2) and the first outlet for the dashboard partition (7), which projects into the outlet of the hot air duct (85) to the spatial separation of Defrost outlet (2) and the first outlet for the dashboard continued, and - An over the evaporator (11) and on both sides of the hot air duct (85) arranged air guide element (6). Heating / air conditioning unit (1) to Claim 1 , characterized in that the air guide element (6) extends over the entire width of the heating / air conditioning unit (1). Heating / air conditioning unit (1) according to one of the preceding claims, characterized in that the at least one first outlet for the dashboard is at least one outlet (31) to the side of the dashboard. Heating / air conditioning unit (1) according to one of the preceding claims, characterized in that the at least one further outlet for the dashboard is at least one outlet (33) to the dashboard center and / or at least one outlet (32) for the indirect ventilation of the dashboard , Heating / air conditioning unit (1) according to one of the preceding claims, characterized in that the air guide element (6) is curved and shows the curvature in the direction of a cold air flap (14) of the heating / air conditioning unit (1). Heating / air conditioning unit (1) according to one of the preceding claims, characterized in that the air guide element (6) is part of the hot air duct (85) or part of the housing of the heating / air conditioning unit (1). Heating / air conditioning unit (1) according to one of the preceding claims, characterized in that it extends the partition wall (7) to the sides of the housing of the heating / air conditioning unit (1). Heating / air conditioning unit (1) according to one of the preceding claims, characterized in that the heating / air conditioning unit (1) has two outlets (4) for the front foot spaces (4) and these have an air stratification flap (41) having a connection can produce to the hot air flow (8). Heating / air conditioning unit (1) according to one of the preceding claims, characterized in that the heating / air conditioning unit (1) has a cold air path (91) which penetrates the hot air duct (85), wherein in the region of the penetration of the hot air duct (85). through a plurality of nozzles (86) is guided and on the side walls (81) of the nozzles, which are the cold air path (91) facing, a plurality of openings (82) are provided, which allow an exchange of air.

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