WO2015012755A1 - Method and system for deaerating the cooling fluid in a heating loop - Google Patents

Method and system for deaerating the cooling fluid in a heating loop Download PDF

Info

Publication number
WO2015012755A1
WO2015012755A1 PCT/SE2014/050750 SE2014050750W WO2015012755A1 WO 2015012755 A1 WO2015012755 A1 WO 2015012755A1 SE 2014050750 W SE2014050750 W SE 2014050750W WO 2015012755 A1 WO2015012755 A1 WO 2015012755A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling fluid
vehicle
engine block
components connected
heating
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
Application number
PCT/SE2014/050750
Other languages
French (fr)
Inventor
Frode HAUS
Mikko Kallio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scania CV AB
Original Assignee
Scania CV AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Scania CV AB filed Critical Scania CV AB
Priority to DE112014003068.6T priority Critical patent/DE112014003068T5/en
Publication of WO2015012755A1 publication Critical patent/WO2015012755A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • 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 devices
    • B60H1/02—Heating, cooling or ventilating devices the heat being derived from the propulsion plant
    • B60H1/03—Heating, cooling or ventilating devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
    • 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 devices
    • B60H1/00314—Arrangements permitting a rapid heating of the heating liquid
    • 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 devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
    • 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 devices
    • B60H1/22—Heating, cooling or ventilating devices the heat source being other than the propulsion plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/028—Deaeration devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater

Definitions

  • the present invention concerns a cooling fluid loop equipped with a heating loop and an extra heating unit for heating a vehicle cab or the like. More specifically, the invention concerns a heating loop that is intended to be
  • the invention also concerns a method for deaerating the fluid in such a heating loop.
  • the invention further concerns a vehicle equipped with a cooling fluid loop/heating loop according to the foregoing.
  • Some of the components in the cooling fluid loop of the vehicle consequently need to be disconnected so that more energy than necessary will not need to be used to heat the water in the cooling fluid loop for heating the cab.
  • a smaller and more limited loop entails that a smaller amount of fluid needs to be heated, and a desired temperature in the vehicle cab is achieved more quickly.
  • the simplest and most effective approach is to disconnect the engine cooling fluid system itself, as it contains the largest volume of fluid, perhaps 70-80 liters, which would otherwise need to be heated.
  • the engine block itself also cools the fluid that passes through its fluid channels.
  • the cooling fluid system expansion tank should also be disconnected, as it is normally connected to the engine cooling fluid system and holds a significant amount of water. These units thus collectively hold a considerable amount of water that would need to be heated in order for the cab heat exchanger/radiator to reach its desired operating temperature and be able to heat the cab efficiently.
  • the cooling fluid is usually passed through an expansion tank during its cycle.
  • the cooling fluid is isolated from ambient atmospheric pressure by means of a so-called pressure cap, often arranged in the expansion tank.
  • the cooling fluid is deaerated in the expansion tank, and the air/oxygen is thus gradually conducted into the surroundings. In future cooling fluid systems, it is likely that the cooling fluid will not pass through an expansion tank, which will make it more difficult to deaerate the cooling fluid.
  • FR2865004 describes, for example, a cooling fluid system for a vehicle, which system emits thermal energy to, e.g. the vehicle cab. With the vehicle standing still and the engine shut off, the engine is disconnected from the cooling medium loop and an extra heater is instead coupled in. A smaller cooling loop is thereby created, the purpose of which is to heat the air in the vehicle cab efficiently.
  • a "swirl can" is arranged in the heating loop, which swirl can deaerates the cooling fluid by means of a swirling function. This solution requires that additional components be
  • EP0561673 describes an alternative cooling fluid system that is intended for a vehicle and emits heat to, e.g., the vehicle cab.
  • a type of swirl can is used to deaerate the fluid in the heating loop in this solution as well, and this solution thus also necessitates that additional bulky components be installed and used, occupying more space and making the solution more expensive.
  • US6405688 describes a cooling fluid system with a thermostat valve that controls the fluid flow.
  • This solution includes the expansion tank in the heating system for the cab, which thus increases the fluid volume that needs to be heated before the cab air can reach the desired temperature.
  • US2006213459 describes a cooling fluid system that comprises two separate loops that are coupled in simultaneously and arranged so as to build up pressure in the cooling system more quickly. This differentiates the solution from the present invention .
  • the prior art in this field thus fails to solve the problem of both limiting the volume of cooling fluid in the heating loop, e.g. by delimiting and disconnecting parts/components of the regular cooling fluid system, while simultaneously deaerating the cooling fluid without necessitating the addition and installation of additional bulky and expensive components in the system.
  • One object of the invention is to solve the aforementioned problems and provide a cooling medium loop for a heating system of the type specified above that can heat, e.g. a vehicle cab when the vehicle engine is shut off, and in such a way that the cooling medium is deaerated and can efficiently transfer heat to a heat exchanger disposed in a vehicle cab.
  • Another object of the invention is that its design must be simple and easy to use, fabricate, install and maintain.
  • the present invention thus concerns a cooling fluid loop comprising a heating loop for heating a vehicle cab or the like during periods when the vehicle engine is shut off, e.g. during rest or break periods when the engine is not supplying thermal energy to the cooling fluid loop.
  • the invention concerns a cooling fluid loop of the type that is equipped with at least one extra heating unit, and wherein a radiator or heat exchanger is arranged in the vehicle cab.
  • the invention entails in part that a portion of the regular cooling fluid system of the vehicle is disconnected, so that a smaller heating loop is formed when the vehicle is standing still with its engine off.
  • the cooling system of the engine block itself and the expansion tank connected thereto are disconnected so as to effectively reduce the fluid volume that needs to be heated to enable heating of the cab.
  • the engine block may typically hold 70-80 liters of fluid, while the smaller heating loop may hold as little as 2-3 liters of fluid.
  • a valve is instead used to deaerate the cooling fluid in the more limited heating loop, preferably a three-way valve by means of which the fluid flow can, at uniform intervals, regularly or when the need arises, be controlled so that it passes into the engine/engine block and/or into the expansion tank for shorter periods.
  • the smaller heating loop is thus filled with already-deaerated cooling fluid from the engine block/expansion tank, and the aerated/oxygenated cooling fluid from the heating loop is conducted into the larger cooling fluid system, where it can be deaerated over a longer period of time .
  • Figure 1 depicts, schematically and essentially in the form of a block diagram, a heating loop according to the invention that comprises an extra heating unit for heating the heat exchanger/radiator of the cab. DESCRIPTION OF PREFERRED EMBODIMENTS
  • Figure 1 depicts, schematically and mainly in the form of a block diagram, parts of a cooling fluid loop with a heating loop 1 according to the invention and comprising an extra heating unit 2 for heating the heat exchanger/radiator 4 of the cab 3.
  • Other components in the normal cooling fluid system of the vehicle such as its compressor, condenser, expansion valve, evaporator etc have been omitted from the figure.
  • the figure schematically presents the components that are of significance for the present invention, such as an engine block 5, an expansion tank 6, a pump 7, a three-way valve 8 and a system of connecting lines between the components, as well as a bypass line 9.
  • An electrically operated fan 10 is also arranged so as to create an airflow through the heat exchanger/radiator 4 of the cab 3 in order to improve the heat transfer between the cooling fluid, the radiator 4 and the cab air .
  • the three-way valve 8 couples, by means of control electronics 11, the engine block 5 and its the expansion tank 6 connected thereto into the cooling fluid system 1, and the pump 7 ensures that cooling fluid passes through the inactive extra heating unit 2 during the forward travel of the vehicle, thereby supplying the heat
  • the cooling fluid which has released at least some of its thermal energy to the heat
  • the three-way valve 8 is switched, by means of the control electronics, so as to prevent the cooling fluid from flowing through the engine block 5 and the expansion tank 6.
  • the cooling fluid flows instead through an extra line, a bypass line 9, which, from a flow standpoint, circumvents the engine block 5 and the expansion tank 6.
  • the pump 7 thus ensures that the cooling fluid now passes through the now-operational extra heating unit 2 and is supplied to the heat exchanger/radiator 4.
  • the cooling fluid which has released at least some of its thermal energy to the heat exchanger/radiator 4 and the cab air, then flows back, bypassing the engine block 5 and the expansion tank 6, via the bypass line 9 to the three-way valve. The loop is thereby closed.
  • the cooling fluid in said smaller heating loop is replaced, at regular intervals or periodically when it is necessary, i.e. intermittently by switching the three-way valve 8 so that the cooling fluid flow path through the engine block 5 and the expansion tank 6 is opened.
  • the smaller heating loop is thereby filled with already-deaerated cooling fluid from the engine block 5, and the aerated cooling fluid from the smaller heating loop 1 is conducted to the engine block 5 and the larger cooling fluid system, where the fluid can be deaerated in the normal way and by means of existing deaerating
  • the intermittent coupling in of the engine block 5 can typically last for ca. 30 seconds, although it can last both longer and shorter times, depending in part on the strength of the flow in the cooling fluid system, or on how much air/oxygen the cooling fluid contains.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The invention concerns a system and a method for deaerating the cooling fluid in a heating loop (1), e.g. installed in a vehicle and intended for heating a vehicle driver compartment or a vehicle cab (3) and comprising a pump (7), an extra heating unit (2), a radiator disposed in the cab (4), and a system of conducting lines through which cooling fluid can flow wherein, when the cooling fluid passes through the engine block (5) and any components connected thereto, such as an expansion tank (6), a deaerating of the cooling fluid occurs. The invention is achieved by intermittently switching the cooling fluid flow so that, in a first mode, it passes/flows through the vehicle engine block (5) and components connected thereto, such as an expansion tank (6) and, in a second mode, passes/flows past the vehicle engine block (5) and/or components connected thereto.

Description

METHOD AND SYSTEM FOR DEAERATING THE COOLING FLUID
IN A HEATING LOOP
TECHNICAL FIELD OF THE INVENTION
The present invention concerns a cooling fluid loop equipped with a heating loop and an extra heating unit for heating a vehicle cab or the like. More specifically, the invention concerns a heating loop that is intended to be
driven/activated when the vehicle engine is shut off and thus not supplying heat to the cooling fluid loop of the vehicle. The invention also concerns a method for deaerating the fluid in such a heating loop. The invention further concerns a vehicle equipped with a cooling fluid loop/heating loop according to the foregoing.
BACKGROUND OF THE ART
The majority of vehicles on the market are currently equipped with some form of cooling fluid system that also heats the vehicle driver compartment or cab. This applies not least to commercial/heavy vehicles that are intended to transport goods in regions with cooler climates. When the vehicle is standing still, e.g. while resting or on a break, and the engine is not running and is no longer emitting any thermal energy, an extra heating unit needs to be used to heat the cab. This extra heating unit is coupled in an appropriate way into the regular cooling fluid system of the vehicle in which a radiator disposed in the cab is also included. Because the volume of water in the vehicle engine and the vehicle expansion tank is large, it can take an estimated one-to-two hours to heat this fluid by means of such a small extra heating unit, which is an undesirably long time.
Some of the components in the cooling fluid loop of the vehicle consequently need to be disconnected so that more energy than necessary will not need to be used to heat the water in the cooling fluid loop for heating the cab. A smaller and more limited loop entails that a smaller amount of fluid needs to be heated, and a desired temperature in the vehicle cab is achieved more quickly. The simplest and most effective approach is to disconnect the engine cooling fluid system itself, as it contains the largest volume of fluid, perhaps 70-80 liters, which would otherwise need to be heated. The engine block itself also cools the fluid that passes through its fluid channels.
For the same reasons, the cooling fluid system expansion tank should also be disconnected, as it is normally connected to the engine cooling fluid system and holds a significant amount of water. These units thus collectively hold a considerable amount of water that would need to be heated in order for the cab heat exchanger/radiator to reach its desired operating temperature and be able to heat the cab efficiently.
The need thus exists for a limited heating system with an extra small heating unit in the heating loop that heats the cab when the engine is shut off. Such an extra heating unit can advantageously be diesel-powered .
One problem that arises in all closed cooling fluid loops is that air bubbles, consisting essentially of oxygen, gradually appear and are entrained in the cooling fluid, which can degrade the heat-transferring ability of the fluid, e.g. the heat transfer between cooling fluid and heat
exchanger/radiator. If too much air/oxygen is present in the cooling fluid, there is also a risk that the cooling fluid will boil due to the degraded circulation of the cooling fluid, which it is desirable to avoid since it sometimes results in the presence of more air/oxygen in the cooling fluid. The degradation of the cooling fluid circulation is, in turn, usually attributable to the circumstance that the pump that is pumping the cooling fluid around in the cooling fluid system does not function efficiently if the cooling fluid contains air/oxygen. In order to reduce the problems associated with air and air bubbles in the cooling fluid, the cooling fluid is usually passed through an expansion tank during its cycle. The cooling fluid is isolated from ambient atmospheric pressure by means of a so-called pressure cap, often arranged in the expansion tank. The cooling fluid is deaerated in the expansion tank, and the air/oxygen is thus gradually conducted into the surroundings. In future cooling fluid systems, it is likely that the cooling fluid will not pass through an expansion tank, which will make it more difficult to deaerate the cooling fluid.
Various solutions have been proposed for eliminating the problems associated with air in cooling fluid by means of deaeration so that the cooling fluid systems will be able to efficiently cool the engine during operation and also transfer sufficient heat to a radiator disposed in the cab during periods when the vehicle is standing still. FR2865004 describes, for example, a cooling fluid system for a vehicle, which system emits thermal energy to, e.g. the vehicle cab. With the vehicle standing still and the engine shut off, the engine is disconnected from the cooling medium loop and an extra heater is instead coupled in. A smaller cooling loop is thereby created, the purpose of which is to heat the air in the vehicle cab efficiently. To reduce the problem of air/oxygen in the fluid in the heating loop, a "swirl can" is arranged in the heating loop, which swirl can deaerates the cooling fluid by means of a swirling function. This solution requires that additional components be
added/installed and used in the vehicle, which takes up more space in the vehicle and makes the solution more cost- intensive . EP0561673 describes an alternative cooling fluid system that is intended for a vehicle and emits heat to, e.g., the vehicle cab. A type of swirl can is used to deaerate the fluid in the heating loop in this solution as well, and this solution thus also necessitates that additional bulky components be installed and used, occupying more space and making the solution more expensive.
US6405688 describes a cooling fluid system with a thermostat valve that controls the fluid flow. This solution includes the expansion tank in the heating system for the cab, which thus increases the fluid volume that needs to be heated before the cab air can reach the desired temperature.
US2006213459 describes a cooling fluid system that comprises two separate loops that are coupled in simultaneously and arranged so as to build up pressure in the cooling system more quickly. This differentiates the solution from the present invention .
The prior art in this field thus fails to solve the problem of both limiting the volume of cooling fluid in the heating loop, e.g. by delimiting and disconnecting parts/components of the regular cooling fluid system, while simultaneously deaerating the cooling fluid without necessitating the addition and installation of additional bulky and expensive components in the system.
SUMMARY OF THE INVENTION
One object of the invention is to solve the aforementioned problems and provide a cooling medium loop for a heating system of the type specified above that can heat, e.g. a vehicle cab when the vehicle engine is shut off, and in such a way that the cooling medium is deaerated and can efficiently transfer heat to a heat exchanger disposed in a vehicle cab.
Another object of the invention is to provide a heating system that takes up little space despite minimal consumption of thermal energy. Another object of the invention is to provide a heating system that uses the existing components of the vehicle to the greatest possible extent.
Another object of the invention is that its design must be simple and easy to use, fabricate, install and maintain.
These and additional objects and advantages are achieved according to the invention by means of a method and a system defined by the features that are specified in the
characterizing portions of independent claims 1 and 6.
The present invention thus concerns a cooling fluid loop comprising a heating loop for heating a vehicle cab or the like during periods when the vehicle engine is shut off, e.g. during rest or break periods when the engine is not supplying thermal energy to the cooling fluid loop. In particular, the invention concerns a cooling fluid loop of the type that is equipped with at least one extra heating unit, and wherein a radiator or heat exchanger is arranged in the vehicle cab.
The invention entails in part that a portion of the regular cooling fluid system of the vehicle is disconnected, so that a smaller heating loop is formed when the vehicle is standing still with its engine off. The cooling system of the engine block itself and the expansion tank connected thereto are disconnected so as to effectively reduce the fluid volume that needs to be heated to enable heating of the cab. The engine block may typically hold 70-80 liters of fluid, while the smaller heating loop may hold as little as 2-3 liters of fluid.
However, the deaeration of the cooling fluid is negatively affected thereby, in that it normally occurs in the expansion tank. A valve is instead used to deaerate the cooling fluid in the more limited heating loop, preferably a three-way valve by means of which the fluid flow can, at uniform intervals, regularly or when the need arises, be controlled so that it passes into the engine/engine block and/or into the expansion tank for shorter periods. The smaller heating loop is thus filled with already-deaerated cooling fluid from the engine block/expansion tank, and the aerated/oxygenated cooling fluid from the heating loop is conducted into the larger cooling fluid system, where it can be deaerated over a longer period of time .
The advantage of this solution is that the existing cooling fluid volume in the vehicle engine and expansion tank can be used to eliminate or reduce the air/bubble problems in the smaller heating loop. The need for additional components is minimized/eliminated, and the system takes up essentially no more space in the vehicle. This results in higher efficiency for the extra heater and necessitates no separate deaerating tank, thereby yielding cost advantages in terms of production and installation.
Further features and advantages of the invention are presented in the following, more detailed description of the invention, and in the accompany drawings and other claims.
BRIEF LIST OF DRAWINGS
The invention is described in greater detail below in several preferred embodiments in relation to the accompanying
drawings .
Figure 1 depicts, schematically and essentially in the form of a block diagram, a heating loop according to the invention that comprises an extra heating unit for heating the heat exchanger/radiator of the cab. DESCRIPTION OF PREFERRED EMBODIMENTS
Figure 1 depicts, schematically and mainly in the form of a block diagram, parts of a cooling fluid loop with a heating loop 1 according to the invention and comprising an extra heating unit 2 for heating the heat exchanger/radiator 4 of the cab 3. Other components in the normal cooling fluid system of the vehicle such as its compressor, condenser, expansion valve, evaporator etc have been omitted from the figure. The figure schematically presents the components that are of significance for the present invention, such as an engine block 5, an expansion tank 6, a pump 7, a three-way valve 8 and a system of connecting lines between the components, as well as a bypass line 9. An electrically operated fan 10 is also arranged so as to create an airflow through the heat exchanger/radiator 4 of the cab 3 in order to improve the heat transfer between the cooling fluid, the radiator 4 and the cab air .
During normal vehicle operation the three-way valve 8 couples, by means of control electronics 11, the engine block 5 and its the expansion tank 6 connected thereto into the cooling fluid system 1, and the pump 7 ensures that cooling fluid passes through the inactive extra heating unit 2 during the forward travel of the vehicle, thereby supplying the heat
exchanger/radiator 4. The cooling fluid, which has released at least some of its thermal energy to the heat
exchanger/radiator 4 and thus to the cab air, then flows back to the engine block 5 and the expansion tank 6, and the loop is closed.
When the vehicle is standing still with its engine shut off, and when the extra heating unit 2 is activated and starts to generate heat, the three-way valve 8 is switched, by means of the control electronics, so as to prevent the cooling fluid from flowing through the engine block 5 and the expansion tank 6. The cooling fluid flows instead through an extra line, a bypass line 9, which, from a flow standpoint, circumvents the engine block 5 and the expansion tank 6. The pump 7 thus ensures that the cooling fluid now passes through the now-operational extra heating unit 2 and is supplied to the heat exchanger/radiator 4. The cooling fluid, which has released at least some of its thermal energy to the heat exchanger/radiator 4 and the cab air, then flows back, bypassing the engine block 5 and the expansion tank 6, via the bypass line 9 to the three-way valve. The loop is thereby closed.
With a view to reducing the problem of accumulated air and air bubbles in the cooling fluid in the smaller heating loop 1, the cooling fluid in said smaller heating loop is replaced, at regular intervals or periodically when it is necessary, i.e. intermittently by switching the three-way valve 8 so that the cooling fluid flow path through the engine block 5 and the expansion tank 6 is opened. The smaller heating loop is thereby filled with already-deaerated cooling fluid from the engine block 5, and the aerated cooling fluid from the smaller heating loop 1 is conducted to the engine block 5 and the larger cooling fluid system, where the fluid can be deaerated in the normal way and by means of existing deaerating
components over a sufficiently long period of time. The intermittent coupling in of the engine block 5 can typically last for ca. 30 seconds, although it can last both longer and shorter times, depending in part on the strength of the flow in the cooling fluid system, or on how much air/oxygen the cooling fluid contains.
The foregoing description is intended primarily to facilitate an understanding of the invention. The invention is naturally not limited to the cited embodiments, but rather other
variants of the invention are possible and conceivable within the framework of the inventive idea and the protective scope of the claims below.

Claims

1. A method for deaerating the cooling fluid in a heating loop (1), e.g. installed in a vehicle, and intended for heating a vehicle driver compartment or cab (3) and comprising a pump
(7), an extra heating unit (2), a radiator (4) disposed in the cab, and a system of conducting lines through which cooling fluid can flow, wherein deaeration of the cooling fluid occurs when the cooling fluid passes through the engine block (5) and any components connected thereto,
characterized by -the method step of,
intermittently switching the cooling fluid flow so that, in a first mode, it passes/flows through the vehicle engine block (5) and/or components connected thereto, such as an expansion tank(6), and in a second mode passes/flows bypassing the vehicle engine block (50) and/or components connected thereto.
2. A method according to claim 1,
characterized by the additional method step of
exerting control in the second mode so that the cooling fluid flows through a bypass line (9) which, from a flow standpoint, circumvents the vehicle engine block (5) and any components connected there to, such as an expansion tank (6) .
3. A method according to claim 1 or 2,
characterized by the additional method step of
switching the flow at intervals by means of a valve (8) .
4. A method according to one or several of the preceding claims,
characterized by the additional method step of
switching the flow by means of a three-way valve (8).
5. A method according to one or several of the preceding claims,
characterized by the additional method step of deaerating the cooling fluid that passes/flows through the engine block (5) and any components connected thereto, such as an expansion tank (6) .
6. A system for deaerating the cooling fluid in a heating loop (1), e.g. installed in and intended for heating a driver compartment or cab in a vehicle and comprising a pump (7), an extra heating unit (2), a system of conducting lines and a radiator (4) through which cooling fluid flows at least periodically,
characterized in that,
a bypass line (9) is arranged so as, at least at
intervals/intermittently, to circumvent, from a flow
standpoint, the engine block (50) and components connected thereto, such as an expansion tank (6) .
7. A system according to claim 6,
characterized in that,
a valve (8) is arranged so as, in a first mode, to guide the cooling fluid flow through the vehicle engine block (5) and/or any components connected thereto and, in a second mode, to guide the cooling fluid flow through the bypass line (9) and past the vehicle engine block (5) and/or any components
connected thereto.
8. A system according to claim 6 or 7,
characterized in that,
the valve (8) is a three-way valve.
9. A system according to claim 6 - 8,
characterized in that,
the radiator (4) is arranged in the cooling medium loop (1) in series with the extra heating unit (2).
10. A vehicle equipped with a system according to any of claims 6-9.
PCT/SE2014/050750 2013-07-23 2014-06-18 Method and system for deaerating the cooling fluid in a heating loop Ceased WO2015012755A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112014003068.6T DE112014003068T5 (en) 2013-07-23 2014-06-18 Method and system for venting the cooling fluid in a heating circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1350909-6 2013-07-23
SE1350909A SE537272C2 (en) 2013-07-23 2013-07-23 Method and system for venting the coolant in a heating circuit mounted in a vehicle

Publications (1)

Publication Number Publication Date
WO2015012755A1 true WO2015012755A1 (en) 2015-01-29

Family

ID=52393643

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2014/050750 Ceased WO2015012755A1 (en) 2013-07-23 2014-06-18 Method and system for deaerating the cooling fluid in a heating loop

Country Status (3)

Country Link
DE (1) DE112014003068T5 (en)
SE (1) SE537272C2 (en)
WO (1) WO2015012755A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112673156A (en) * 2018-09-13 2021-04-16 标致雪铁龙汽车股份有限公司 Method for preventing the collection of heat transfer fluid in the cooling system of a heat engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030029167A1 (en) * 2001-08-09 2003-02-13 Deere & Company, A Delaware Corporation Motor vehicle cooling system
US20090020081A1 (en) * 2007-07-16 2009-01-22 Gm Global Technology Operations, Inc. Integrated Vehicle Cooling System
FR2949508A1 (en) * 2009-09-03 2011-03-04 Peugeot Citroen Automobiles Sa Internal combustion engine for motor vehicle, has heating unit heating rod, where application of electric drive on heating unit provokes connection of low temperature circuit with high temperature circuit and casing
WO2011077051A1 (en) * 2009-12-23 2011-06-30 Peugeot Citroën Automobiles SA Vehicle comprising a double cooling circuit
US20120097364A1 (en) * 2010-04-24 2012-04-26 Audi Ag Valve arrangement for venting a coolant circuit of an internal combustion engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030029167A1 (en) * 2001-08-09 2003-02-13 Deere & Company, A Delaware Corporation Motor vehicle cooling system
US20090020081A1 (en) * 2007-07-16 2009-01-22 Gm Global Technology Operations, Inc. Integrated Vehicle Cooling System
FR2949508A1 (en) * 2009-09-03 2011-03-04 Peugeot Citroen Automobiles Sa Internal combustion engine for motor vehicle, has heating unit heating rod, where application of electric drive on heating unit provokes connection of low temperature circuit with high temperature circuit and casing
WO2011077051A1 (en) * 2009-12-23 2011-06-30 Peugeot Citroën Automobiles SA Vehicle comprising a double cooling circuit
US20120097364A1 (en) * 2010-04-24 2012-04-26 Audi Ag Valve arrangement for venting a coolant circuit of an internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112673156A (en) * 2018-09-13 2021-04-16 标致雪铁龙汽车股份有限公司 Method for preventing the collection of heat transfer fluid in the cooling system of a heat engine
CN112673156B (en) * 2018-09-13 2023-07-04 标致雪铁龙汽车股份有限公司 Method for preventing heat carrier gas collection in a cooling system of a heat engine

Also Published As

Publication number Publication date
DE112014003068T5 (en) 2016-03-10
SE537272C2 (en) 2015-03-24
SE1350909A1 (en) 2015-01-24

Similar Documents

Publication Publication Date Title
CN112238727B (en) Thermal management system for vehicle and integrated thermal management module
US9365090B2 (en) Climate control system for vehicles using thermoelectric devices
TWI577579B (en) Extended program electric bus circulation system
KR101921809B1 (en) Temperature control system for electric car
CN102230417B (en) Engine electric control auxiliary cooling system freeing from engine rotational speed influence
CN205736778U (en) Hybrid power air conditioning system
RU2011101958A (en) AUXILIARY COOLING DEVICE FOR CONNECTING TO THE AIRCRAFT LIQUID COOLING SYSTEM
CN115891573B (en) A whole vehicle thermal management system for electric commercial vehicles and a pure electric commercial vehicle
CN207241416U (en) A kind of cooling system for vehicle
CN104412445B (en) Motor vehicle with battery cooling system
US20060086816A1 (en) Switchable radiator bypass valve set point to improve energy efficiency
CN106458009B (en) Temperature control system of electric vehicle
CN104999890A (en) Motor and battery temperature integration control system of electric automobile
EP4025441A1 (en) System for integrated control of the temperature of a battery and of an interior air conditioning apparatus in a vehicle
CN116476594B (en) A thermal management integrated module
CN209365808U (en) A kind of pure electric vehicle heat circulating system
CN201872570U (en) Electric heating system of electric automobile
CN218376642U (en) Cooling system for engine and vehicle
KR20170007452A (en) Cooling arrangement and a motor vehicle equipped with such a cooling system
CN118752970A (en) Thermal management system for new energy commercial vehicles and new energy commercial vehicles
CN203511270U (en) Hybrid power system
CN216245037U (en) Bearing test bed cooling system
CN201559554U (en) Driver seat heating system
KR100862458B1 (en) Air pump unit inlet air cooling structure for vehicle
CN202381162U (en) Automatic venting and cooling system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14829570

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 112014003068

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14829570

Country of ref document: EP

Kind code of ref document: A1