WO2016001039A1 - Procede de fonctionnement d'un dispositif de conditionnement thermique d'un habitacle de vehicule automobile - Google Patents
Procede de fonctionnement d'un dispositif de conditionnement thermique d'un habitacle de vehicule automobile Download PDFInfo
- Publication number
- WO2016001039A1 WO2016001039A1 PCT/EP2015/064274 EP2015064274W WO2016001039A1 WO 2016001039 A1 WO2016001039 A1 WO 2016001039A1 EP 2015064274 W EP2015064274 W EP 2015064274W WO 2016001039 A1 WO2016001039 A1 WO 2016001039A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat exchanger
- temperature
- air flow
- flow
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00021—Air flow details of HVAC devices
- B60H1/00035—Air flow details of HVAC devices for sending an air stream of uniform temperature into the passenger compartment
- B60H1/0005—Air flow details of HVAC devices for sending an air stream of uniform temperature into the passenger compartment the air being firstly cooled and subsequently heated or vice versa
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00021—Air flow details of HVAC devices
- B60H2001/0015—Temperature regulation
- B60H2001/00164—Temperature regulation with more than one by-pass
Definitions
- the present invention relates to a method of operating a thermal conditioning device of a passenger compartment of a motor vehicle.
- the invention aims in particular to provide a simple, effective and economical solution to this problem.
- a refrigerant circuit comprising a heat exchanger capable of forming an evaporator, the heat exchanger being able to exchange heat with a flow of air intended to be conditioned,
- At least one first bypass means capable of deflecting at least a portion of said airflow from the heat exchanger at a first position of the first bypass means and capable of directing said flow of air through the heat exchanger, in a second position of the first bypass means
- At least one heating means located downstream, in the direction of flow of said air flow, of the heat exchanger and / or downstream of the first bypass means,
- At least one second bypass means capable of diverting from said at least one heating means at least a portion of the air flow, in a first position of the second bypass means, and adapted to direct said flow of air through the means in a second position of the second bypass means
- the first temperature may be between 15 and 20 ° C.
- the second temperature may be between 25 and 30 ° C.
- the heating means may comprise a radiator adapted to exchange heat between a coolant and the air for passing through said radiator.
- the coolant is for example glycol water belonging to a cooling circuit of a vehicle engine.
- frigories are able to be stored in the heat exchanger, for example by means of a phase change material.
- An evaporator capable of storing frigories also known as a storage evaporator, is known for example from documents FR 2 847 973 and FR 2 878 613.
- Such an evaporator comprises, for example, a tank containing a phase-change material (also known as English abbreviation PCM), capable of solidifying or liquefying.
- PCM phase-change material
- phase change such a material can store heat energy or frigories in the form of latent heat of solidification or liquefaction.
- These stored frigories can be returned to a flow of air, so as to cool, especially when the compressor is stopped.
- the most commonly used phase change materials are paraffins, whose liquefaction point is between 5 ° C and 12 ° C.
- the compressor may be driven by a motor of the vehicle, the compressor operating and stopping phases being, during at least part of the operating period of the engine, independent of the operating mode of the engine, in particular a motor brake mode. It is recalled that, in a motor brake mode, the fuel supply of the engine of the vehicle is reduced or stopped, the engine then providing a resisting torque transmitted to the wheels of the vehicle.
- the stopping or starting of the compressor may be a function of the cold storage state of the heat exchanger.
- the ratio of the quantity of frigories stored in the exchanger to the quantity of frigories that can be stored in the exchanger is defined by storage status.
- This storage state can be determined for example by calculation, in particular using one or more of the following parameters, taken alone or in combination: dimensions of the reservoir (s) containing a phase change material, quantity of said material, speed airflow, airflow rate, surface temperature of the heat exchanger, etc.
- first threshold value maximum threshold
- minimum threshold a threshold value
- the exchanger is fully charged, and if the storage state of the exchanger is equal to 0, then the exchanger is completely discharged.
- the compressor can be stopped when the heat exchanger is charged in frigories, that is to say when the storage state of the frigories of the exchanger is greater than a determined threshold, for example 20 000 joules.
- the compressor can be started when the vehicle engine is in a high performance phase, for example when the engine is at high speed, and / or when the vehicle is in an engine brake mode.
- the stopping and starting of the compressor may be a function of the temperature outside the vehicle and / or the efficiency of the engine of the vehicle when the compressor is driven by said engine.
- the means for storing the frigories of the heat exchanger may comprise at least one phase-change material, preferably at least two phase-change materials, said materials having two different liquefaction temperatures.
- the liquefaction temperature of a first phase-change material may, for example, be of the order of 11 ° C. and the liquefaction temperature of a second phase-change material may for example be of the order of 8 ° C. ° C.
- the flow of air passing through the heat exchanger can have a relatively high temperature. low, for example of the order of 9 ° C, in particular by liquefaction of the second material and transfer of stored frigories to the air flow.
- the solidification of the second material can be obtained only with a large flow of refrigerant and with a pressure and a temperature of the refrigerant which are lower than the pressure and the liquefaction temperature of said second material, which can be obtained by increasing the displacement of the compressor (when it is variable displacement) and / or by increasing the speed of rotation of the compressor. It is therefore more difficult to solidify, that is to say recharge, the second phase change material. Such reloading therefore requires taking more power from the engine, which can be done for example on periods of engine operation that are favorable, such as the periods mentioned above (high engine speed, engine brake).
- the compressor is a variable displacement compressor.
- the invention thus makes it possible to use the compressor with a high cubic capacity, during the period of storage of frigories in the heat exchanger, before stopping the compressor. The efficiency of the device is therefore improved.
- FIG. 1 is a schematic view of a device according to the invention
- FIG. 2 is a view corresponding to FIG. 1, illustrating a first mode of operation according to the invention
- FIG. 3 is a view corresponding to FIG. 1, illustrating a second mode of operation according to the invention
- FIG. 4 is a view corresponding to FIG. 1, illustrating a third mode of operation according to the invention
- FIG. 5 is a schematic view of an evaporator comprising two different phase-change materials
- FIG. 6 is a diagram illustrating an algorithm that can be used for implementing the method according to the invention.
- FIG. 1 represents a device for thermal conditioning of a passenger compartment of a motor vehicle, comprising a refrigerant circuit comprising a first heat exchanger 1 capable of forming a condenser, and a second heat exchanger 2 capable of forming an evaporator.
- the refrigerant circuit may furthermore comprise a variable displacement compressor C intended to be driven by a motor of the vehicle, and an expander D.
- a fan V makes it possible to circulate a flow of air through the first heat exchanger 1.
- the second heat exchanger 2 is located in a channel 4 for circulating a flow of air intended to open into the passenger compartment of the vehicle and drawing for example air outside the vehicle.
- This channel 4 belongs to a heating, ventilation and / or air conditioning system, also called H.V.A.C. (Heating, Ventilation and Air-Conditioning).
- a first bypass means such as for example a first flap V1 can be mounted near the second heat exchanger 2.
- the first flap V1 is movable between a two extreme positions, namely a first extreme position (shown in solid line ) in which no air flow can bypass the second heat exchanger 2, and a second extreme position (shown in broken lines) in which an air flow can bypass the second Heat exchanger 2.
- the first flap V1 may be disposed in intermediate positions, located between said extreme positions.
- This storage state can be determined for example by calculation, in particular using one or more of the following parameters, taken alone or in combination: dimensions of the reservoir (s) containing a phase change material, quantity of said material, speed airflow, airflow rate, surface temperature of the heat exchanger, etc.
- the exchanger is fully charged, and if the storage state of the exchanger is equal to 0, then the exchanger is completely discharged.
- the second heat exchanger 2 stores thermal energy in the form of frigories (that is to say that the phase-change material is solidified), by circulation of the refrigerant through the compressor C, the second heat exchanger 2, the expander D and the first heat exchanger 1. Such storage therefore only occurs when the compressor C is started. Conversely, when the compressor C is stopped, the frigories stored in the second heat exchanger 2 can be destocked, that is to say transferred to the air flow passing through said heat exchanger 2.
- the compressor C is for example stopped when the heat exchanger 2 is charged in cold, that is to say when the storage state frigories of the exchanger is above a certain threshold, for example 20 000 joules.
- F1 is the flow of air coming from the outside air of the vehicle and passing through the channel 4,
- F2 is the flow of air passing through the second heat exchanger 2
- - F4 is the air flow bypassing the third heat exchanger 3 and intended to open into the passenger compartment.
- Such a mode of operation is applicable when the temperature of the outside air, that is to say the temperature of the flow F1, is between a first temperature, for example between 15 and 20 ° C and a second temperature, for example between 25 and 30 ° C.
- the flow F1 has a temperature of the order of 25 ° C.
- the flow F2 has a flow rate equal to 0.76 times the flow rate F1 and has a temperature at the outlet of the second heat exchanger 2 which is of the order of 8 ° C.
- the flow F3 has a flow rate equal to 0.24 times the flow rate F1 and also has a temperature of the order of 25 ° C.
- Flux F4 is formed by the mixture of flows F2 and F3.
- the flow rate of the flow F4 is equal to that of the flow F1.
- the flow F4 has a temperature of the order of 12 ° C.
- a part (flow F2) of the outside air (stream F1) is cooled (and thus dehumidified) by passing through the second heat exchanger 2, and then reheated by mixing with a fraction (flow F3) of outside air, warmer, so as to obtain the desired set temperature by the user (in this case 12 ° C).
- management means G make it possible to operate the compressor C in a cyclic manner, each cycle comprising a phase of actuation of the compressor C and storage of the frigories in the second heat exchanger 2 (solidification of the phase-change material ), followed by a stop phase of the compressor C and destocking of the frigories of the second heat exchanger 2 (liquefaction of the phase change material).
- the management means G are designed to stop the compressor C when the second heat exchanger 2 is charged in frigories, that is to say when the storage state of the second exchanger 2 is greater than a determined value. .
- C may be, during at least part of the period of operation of the engine of the vehicle, independent of the operating mode of the engine, in particular of a motor brake mode, unlike the prior art.
- the management means G may be designed to start the compressor C when the vehicle engine is in a high efficiency phase, for example when the engine is at high speed, and / or when the vehicle is in a mode of operation. Engine brake. It is then sought to profit effectively from these high efficiency phases, when present, although the cyclic operation of the compressor C is not solely related to such phases.
- management means G make it possible to operate the fan V together with the compressor C.
- FIG. 3 illustrates a second mode of operation, in which the first flap V1 and the second flap V2 are partially open.
- the following air flows are defined:
- - F'1 is the flow of air from the outside air of the vehicle and passing through the channel 4,
- F'4 is the flow of air passing through the third heat exchanger 3
- F'6 is the flow of air intended to open into the passenger compartment and formed from the mixture of flows F'4 and F'5.
- Such a mode of operation is applicable when the temperature of the outside air, that is to say the temperature of the flow F'1, is lower than the first temperature, for example between 15 and 20 ° C.
- the flow F'1 has a temperature of the order of 15 ° C.
- the flow F'2 has a flow rate equal to 0.5 times the flow rate of the flow F'1 and has a temperature at the outlet of the second heat exchanger 2 which is of the order of 5 ° C.
- the flow F'3 has a flow rate equal to 0.5 times the flow rate of the flow F'1 and also has a temperature of the order of 15 ° C.
- the flow F'4 has a flow equal to 0.5 times the flow rate of the flow F'1 and has a temperature at the outlet of the third heat exchanger 3 which is of the order of 60 ° C.
- the flow F'5 has a flow equal to 0.5 times the flow rate of the flow F'1 and has a temperature of the order of 10 ° C.
- the flow F'6 is equal to the flow rate of the flow F'1 and has a temperature of the order of 30 ° C.
- the phases of actuation and stopping of the compressor C may be, during at least a part of the operating period of the engine, independent of the operating mode of the engine, in particular of a motor brake mode, unlike to the prior art.
- FIG. 4 illustrates a third mode of operation, in which the first flap V1 and the second flap V2 are completely closed.
- the following air flows are defined:
- F "1 is the flow of air coming from the outside air of the vehicle and passing through the channel 4,
- Such a mode of operation is applicable when the temperature of the outside air, that is to say the temperature of the flow F "1, is greater than the second temperature, for example between 25 and 30 ° C.
- the flow F "1 has a temperature of the order of
- the flow F "2 has a flow rate equal to the flow rate of the flow F" 1 and has a temperature at the outlet of the second heat exchanger 2 which is of the order of 9 ° C.
- the flow F "3 has a flow rate equal to the flow rate of the flow F" 1 and also has a temperature of the order of 9 ° C., which is the set temperature desired by the user.
- the entire flow through the channel 4 is cooled by the second heat exchanger 2 (so-called air conditioning mode).
- the phases of actuation and stopping of the compressor C may be, during at least a part of the operating period of the engine, independent of the operating mode of the engine, in particular of a motor brake mode, unlike to the prior art.
- FIG. 5 illustrates an alternative embodiment in which the second heat exchanger 2 comprises two reservoirs 5, 6 respectively comprising a first and a second phase-change material, said materials having two different liquefaction temperatures, and a part 8 adapted to exchange heat with the corresponding airflow that passes through it.
- the passage of the refrigerant through the second heat exchanger 2 and the tanks 5, 6 is performed through lines 8, the flow direction of the refrigerant in the pipes 8 being represented by arrows.
- the liquefaction temperature of a first phase-change material may, for example, be of the order of 11 ° C. and the liquefaction temperature of a second phase-change material may for example be of the order of 8 ° C. ° C.
- the flow of air passing through the second heat exchanger 2 may have a relatively low temperature, for example of the order of 9 ° C, in particular by liquefaction of the second material and transfer frigories stored in the airflow.
- the solidification of the second phase-change material can be obtained only with a large flow of refrigerant and with a pressure and a temperature of the refrigerant which are lower than the pressure and the liquefaction temperature of said second material, which can be achieved by increasing the displacement of the compressor C and / or by increasing the speed of rotation of the compressor C. It is therefore more difficult to solidify, that is to say recharge, the second material with change of phase.
- Such reloading therefore requires taking more power from the engine, which can be done for example on periods of engine operation that are favorable, such as the periods mentioned above (high engine speed, engine brake).
- FIG. 6 is a diagram illustrating an algorithm that can be used for implementing the method according to the invention. In this algorithm:
- PP denotes the flow of air flowing in the channel 4,
- - Ta is the temperature outside the vehicle
- Te denotes the target temperature to be reached in the passenger compartment
- T1 denotes a lower temperature limit
- the algorithm comprises a step E2 for determining the parameter Te.
- step E2 the algorithm comprises a test step E3 in which it is determined whether the temperature Ta is lower than the temperature T1.
- step E3 the algorithm comprises a step E4 in which:
- the position P1 is calculated as a function of the flow rate PP
- the position P2 is calculated as a function of the flow PP.
- step E4 the algorithm includes a stopping step E5.
- step E3 If step E3 returns a negative result, then the algorithm comprises a test step E6 in which it is determined whether the temperature Ta is between the temperatures T1 and T2.
- step E6 the algorithm comprises a step E7 during which:
- the position P1 is calculated as a function of the temperature Te and the flow rate PP,
- the PWM command is calculated as a function of the temperature Te and the speed Ne,
- the position P2 is defined as the closed position.
- step E7 the algorithm includes a stopping step E8.
- step E6 returns a negative result
- the algorithm comprises a step E9 during which:
- the position P2 is defined as the closed position.
- the algorithm comprises a stop step E10.
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201580034892.XA CN106470859B (zh) | 2014-06-30 | 2015-06-24 | 用于操作用于机动车辆乘客舱的环境控制的装置的方法 |
| BR112016029174A BR112016029174A2 (pt) | 2014-06-30 | 2015-06-24 | método para operação de um dispositivo para o controle climático de um compartimento de passageiros de um veículo a motor |
| DE112015003065.4T DE112015003065T5 (de) | 2014-06-30 | 2015-06-24 | Verfahren zum Betreiben einer Vorrichtung zur Wärmebehandlung eines Kraftfahrzeugfahrgastraums |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1456135A FR3022856B1 (fr) | 2014-06-30 | 2014-06-30 | Dispositif de conditionnement thermique d'un habitacle de vehicule automobile |
| FR1456136 | 2014-06-30 | ||
| FR1456136A FR3022853B1 (fr) | 2014-06-30 | 2014-06-30 | Procede de fonctionnement d'un dispositif de conditionnement thermique d'un habitacle de vehicule automobile |
| FR1456135 | 2014-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016001039A1 true WO2016001039A1 (fr) | 2016-01-07 |
Family
ID=53483826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2015/064274 Ceased WO2016001039A1 (fr) | 2014-06-30 | 2015-06-24 | Procede de fonctionnement d'un dispositif de conditionnement thermique d'un habitacle de vehicule automobile |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN106470859B (fr) |
| BR (1) | BR112016029174A2 (fr) |
| DE (1) | DE112015003065T5 (fr) |
| WO (1) | WO2016001039A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017208228A1 (de) * | 2017-05-16 | 2018-11-22 | Robert Bosch Gmbh | Vorrichtung und Verfahren zum Klimatisieren eines Fahrzeuges |
| DE102018106321B4 (de) * | 2018-03-19 | 2023-06-01 | Hanon Systems | Klimagerät für ein Kraftfahrzeug |
| CN112269415B (zh) * | 2020-09-30 | 2022-12-16 | 深圳永晟中业达健康科技有限公司 | 一种低压舱的控制方法及装置 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6330909B1 (en) * | 1998-10-23 | 2001-12-18 | Denso Corporation | Vehicle air conditioning system |
| US20050115704A1 (en) * | 2003-12-02 | 2005-06-02 | Koji Ito | Vehicle air conditioner |
| EP1616733A1 (fr) * | 2004-07-13 | 2006-01-18 | Behr GmbH & Co. KG | Dispositif et procédé de climatisation de véhicule |
| JP2013159228A (ja) * | 2012-02-06 | 2013-08-19 | Denso Corp | 車両用空調装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685162A (en) * | 1991-04-26 | 1997-11-11 | Nippondenso Co., Ltd. | Automotive air conditioner having condenser and evaporator provided within air duct |
| CN2918130Y (zh) * | 2006-07-12 | 2007-07-04 | 福建工程学院 | 回风调温轿车空调 |
-
2015
- 2015-06-24 BR BR112016029174A patent/BR112016029174A2/pt not_active Application Discontinuation
- 2015-06-24 DE DE112015003065.4T patent/DE112015003065T5/de not_active Ceased
- 2015-06-24 CN CN201580034892.XA patent/CN106470859B/zh not_active Expired - Fee Related
- 2015-06-24 WO PCT/EP2015/064274 patent/WO2016001039A1/fr not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6330909B1 (en) * | 1998-10-23 | 2001-12-18 | Denso Corporation | Vehicle air conditioning system |
| US20050115704A1 (en) * | 2003-12-02 | 2005-06-02 | Koji Ito | Vehicle air conditioner |
| EP1616733A1 (fr) * | 2004-07-13 | 2006-01-18 | Behr GmbH & Co. KG | Dispositif et procédé de climatisation de véhicule |
| JP2013159228A (ja) * | 2012-02-06 | 2013-08-19 | Denso Corp | 車両用空調装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106470859A (zh) | 2017-03-01 |
| DE112015003065T5 (de) | 2017-03-23 |
| CN106470859B (zh) | 2019-02-15 |
| BR112016029174A2 (pt) | 2017-08-22 |
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