Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D25/00—Pumping installations or systems
  • F04D25/02—Units comprising pumps and their driving means
  • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
  • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
• • 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
  • B60H1/00028—Constructional lay-out of the devices in the vehicle
• • 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
  • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
  • B60H1/00514—Details of air conditioning housings
  • B60H1/00521—Mounting or fastening of components in housings, e.g. heat exchangers, fans, electronic regulators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/58—Cooling; Heating; Diminishing heat transfer
  • F04D29/5806—Cooling the drive system
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
  • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
  • F04D29/626—Mounting or removal of fans
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/26—Means for adjusting casings relative to their supports
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
  • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
  • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2230/00—Manufacture
  • F05D2230/50—Building or constructing in particular ways
  • F05D2230/52—Building or constructing in particular ways using existing or "off the shelf" parts, e.g. using standardized turbocharger elements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2260/00—Function
  • F05D2260/30—Retaining components in desired mutual position
  • F05D2260/38—Retaining components in desired mutual position by a spring, i.e. spring loaded or biased towards a certain position

Definitions

• HVAC heating, ventilation and / or air conditioning unit
• Said HVAC unit comprises, among other components, a constructive subassembly which is commonly referred to in the jargon as a Motor-Fan Group (GMV), which is constituted by an electric motor which actuates the centrifugal wheel of the fan, by a motor support of the carcass type that supports from below said engine and generally by a damping system to prevent the transmission of noise and vibration.
• GMV Motor-Fan Group
• the Fan Motor Group integrates into the complete HVAC unit.
• the present invention also relates to a motor-fan unit for a HVAC unit, the motor-fan unit incorporating the improved engine support unit defined in the first subject of the invention.
• the particularity of the present invention lies in that said improved engine support assembly allows the efficient and economical integration of different types of electric motors for ventilation and also of different sizes for the same engine support, while ensuring appropriate cooling of the engine.
• HVAC Heating, Ventilation and Air Conditioning
• the HVAC unit is normally installed under the dashboard of a vehicle and is able to receive in the passenger compartment of the vehicle an external air flow coming from the outside or an internal flow (recycling of the air) and producing a conditioned air flow within the passenger compartment of the vehicle in accordance with the specific conditions of comfort.
• the HVAC air conditioning unit of a motor vehicle consists of various air treatment devices, such as an air filter, for removing at least some particles from the incoming air stream, air treatment, such as a motor-fan unit, for producing an air flow through the HVAC unit, and treatment devices for heating and cooling the air, including, inter alia, an evaporator and a heating radiator.
• air treatment devices such as an air filter, for removing at least some particles from the incoming air stream, air treatment, such as a motor-fan unit, for producing an air flow through the HVAC unit, and treatment devices for heating and cooling the air, including, inter alia, an evaporator and a heating radiator.
• the Moto-Fan Group includes a fan wheel and an electric motor that can turn the fan wheel, whose function is to push the flow of air through the HVAC air conditioning unit.
• the electric motor of the Moto-Fan Group can be a direct current (DC) electric motor with brushes.
• the motor support assembly of the present invention could also be installed in fan assemblies equipped with another type of motors, different from the DC motor with brushes, but which preferably bear brushes, such as alternating current (AC) with brushes.
• AC alternating current
• the Moto-Fan Group also includes a lower engine support part, referred to in the jargon as "engine support”, whose function is to support the weight of the engine. and ensure that it stays in the correct position to connect electrically and that the wheel operates freely.
• Said motor support configured in the carcass type, serves in addition to housing and supporting from below the load of the fan motor, isolating the vibrations and absorbing shock, whereby it must be extremely durable and resistant to heat . In addition, it must be easy to manufacture and assemble.
• the new engine mounts are designed so that this cooling air circulates through the inside of the engine to thereby remove the heat produced by the brushes, the coils and / or the electronic control elements, so that the motor runs efficiently and with reduced wear.
• the same engine support design is generally not suitable for different types of engine.
• a medium power motor eg 60 mm diameter / 250 W power
• a high power motor eg 75 mm / 320 W power
• the air flow received by the motor is not sufficient to cool it. Only in a very small number of cases can a single engine mount be able to receive different types of engine while ensuring optimum engine cooling, but in no case engines of different sizes.
• the first object of the present invention is to provide an improved engine support assembly adapted to be used in the ventilation unit and / or air conditioning (HVAC) of a motor vehicle, which provides a solution to the aforementioned drawbacks and has the advantages described. below.
• HVAC air conditioning
• the present invention proposes a motor support assembly for a heating, ventilation and / or air conditioning (HVAC) unit, the motor support assembly being configured to receive an electric motor. for a centrifugal fan and also for supporting the lower end of the axis of said electric motor, said engine support assembly comprising a carcass-shaped engine support, characterized in that it further comprises a partition wall capable of The axis of said motor is traversed and dimensioned to be able to be coupled inside the carcass while in contact with the motor, so that it blocks the passage of the cooling air flow in the zone. contact of the partition wall with the motor.
• HVAC heating, ventilation and / or air conditioning
• the second object of the present invention is to provide a motor-fan unit for use in an HVAC unit, which comprises the following components: an electric motor, a centrifugal fan wheel and the improved engine support assembly as claimed, said group Motor-Fan providing a solution to the aforementioned drawbacks and having the advantages described below.
• this electric motor may be a DC motor with brushes, or an AC motor with brushes, even if the improved motor support assembly according to the present invention may also be suitable. to accommodate another type of motors for equivalent ventilation.
• this partition wall in the lower part of the engine support is that a specific volume of the lower zone of the engine support remains closed or almost closed. With this, it is obtained that the cooling air does not escape to this lower zone (which is the one where it is not suitable for it to circulate) and therefore goes as far as possible to the motor and its brushes for they are optimally cooled.
• the configuration of the partition wall it is preferably constituted by a flexible body, capable of deforming sufficiently, but without breaking so that it can be placed in a perfect and fixed manner inside the support engine.
• the partition wall is provided with a central orifice to allow the passage of the lower end of the axis of the motor.
• Said central orifice therefore has a diameter slightly greater than that of the lower end of the major motor shaft.
• the partition wall has a thin body, thin, made of a material that allows it to deform, so that it can bend enough and acquire a final shape slightly convex, but without breaking. It has a preferred thickness of between 0.5 and 10 mm.
• the engine supports are normally also circular, whereby the body of the partition wall may have a circular or substantially circular outer contour. circular, to adapt to these circular shapes usual engine and engine mount. Nevertheless, other possible outer forms of the partition wall could be applied to accommodate different configurations of engine mounts without changing the essence of this part.
• the body of the partition wall may have in its outer peripheral zone a slot which emerges from its outer contour inwards and whose function is to ensure the correct assembly of the partition wall.
• Said slot has the advantageous function of a polarizer for mounting the partition of separation always in the same position relative to the engine support. This slot is always in the same position in the engine mount.
• the slot has a rectangular shape, with greater width and less depth. Nevertheless, various other forms can be envisaged.
• the partition wall body may include one or more cutting lines that emerge from the outer contour to the interior of the body.
• the said cutting line (s) has the function of allowing a suitable and safe mounting, since they ensure interlocking at one or more points of the motor support at the same time as they retain the partition wall. so that it does not fall during assembly.
• the number, orientation and length of this cutting line (s) in the partition wall will depend on each specific configuration of the inner surface of the engine support. In general, this (these) cutting line (s) will be from 1 to 6 lines and will be lines of length less than the diameter of the partition.
• the body of the partition wall has initially planar upper and lower surfaces which, advantageously, when they deform at the time of assembly, eventually adopt a final form of substantially convex work.
• This deformation of the central part during assembly is possible thanks to the flexibility of the material with which the partition wall is manufactured, in combination with its thickness.
• the mounting of the partition wall in the engine support is as follows: the body of the partition wall, originally plane, supported by its outermost part on the inner part of the motor support, the separating partition remaining higher than the position of the engine, then the motor is placed in its position inside the engine support and in this position pushes the central part the partition wall, which makes it acquire a final shape slightly convex . In this final situation, it is advantageous to succeed in creating a firmer contact between the motor-partition wall-engine support which allows the air to pass through the engine and cool appropriately.
• the partition wall in its working position is disposed in an orientation perpendicular to the motor axis and at the height of the lower end of the engine, creating at least one peripheral zone contact between the partition wall and the inner surface of the engine support.
• the partition wall during its assembly, has three distinct peripheral contact areas: a first peripheral contact zone between the outermost part of the partition wall and an inner wall of the support engine; a second peripheral zone of contact between the extreme part at the bottom of the engine and the central zone of the partition wall in the vicinity of the central hole; and a third peripheral zone of contact between another inner wall of the motor support and another outer zone of the partition wall.
• These peripheral areas of contact of the partition wall may vary, without affecting the essential character of the invention, and there may be more or less contact areas between said partition wall and the internal parts of the engine support and the lower part of the engine.
• the applicant was able to observe that the body of the partition wall, thin and deformable, preferably had a thickness of between 0.5 and 10 mm.
• This thickness parameter will depend to a large extent on the type of material to be used; that is, the thickness of the partition is directly related to the stiffness of the type of material used to make the partition wall.
• the material of manufacture of the partition wall is preferably permeable to water, since water-tightness has been found to be a problem.
• the partition wall is made of a material which, in addition to being flexible enough to deform slightly under the weight of the motor without breaking, is non-permeable, so that the air flow goes through the engine and not through the partition wall. It is for this reason that the material of manufacture of the partition wall is preferably non-porous. However, the non-porosity of the material is not a critical requirement, since air pressures are limited in this area of the HVAC system, whereby alternatively the material may be porous.
• this partition wall can be made from a plastic film (also commonly referred to in English as "film”), which preferably has a thickness of 0. , 5 to 2 mm. Said plastic film having a thickness of between 0.5 and 2 mm has sufficient flexibility to deform slightly during the assembly action of the engine, without breaking. It is also with a type of economic material that makes the partition wall.
• a plastic film also commonly referred to in English as "film”
• film which preferably has a thickness of 0. , 5 to 2 mm.
• Said plastic film having a thickness of between 0.5 and 2 mm has sufficient flexibility to deform slightly during the assembly action of the engine, without breaking. It is also with a type of economic material that makes the partition wall.
• the deflector made of foam which has shown the best results is preferably between 4 and 6 mm.
• the partition made of foam with a thickness of between 4 and 6 mm has sufficient flexibility to deform slightly during the assembly action of the engine, without breaking. It is also with a type of economic material that makes the partition wall.
• the two materials described above, the plastic film and the foam have optimal characteristics of flexibility and non-permeability, necessary to solve the technical problem of the invention.
• the shape and materials of the partition wall object of the invention are so simple, it can be produced easily and economically, for example by a stamping process.
• This stamping process offers a significant advantage in reducing costs and manufacturing times, as it provides the opportunity to encompass other processes that are also more economical than injection molding processes (also covers thermoforming), cutting (covers cutting and stamping) and molding (injection covers under low / high pressure with / without temperature).
• the partition wall can also be made using a plastic injection process.
• the partition wall can be made using a thermoforming process.
• the partition wall body disclosed above, advantageously no specific design features are needed on the motor support side to set up said partition wall, since it is put in place simply by contact and engagement of said element with the walls of the motor support. Therefore, since it is not necessary to make any modification for the implementation of the partition wall object of the invention, the manufacturing cost of the motor-fan unit is very low since it does not will be affected only by the cost of manufacturing the partition wall itself, which by its characteristics is low. This also translates into a substantial gain in minimizing development costs, shorter development times, and a higher level of standardization.
• this partition wall is not only easy and quick to manufacture and mount in the engine mount, but still fully compatible with the assembly process of the motor-fan unit.
• FIG. 1A is a front view of a conventional fan motor unit for an HVAC unit, in which the motor support is designed specifically for a specific motor of ventilation, 75 mm in diameter and 320 W, with its wheel. corresponding centrifugal fan.
• FIG. 1B is the same front view of the same conventional fan motor group as in the previous figure, in which the engine was exchanged for 75 mm and 320 W for a smaller motor, 60 mm in diameter and 250 W .
• Figure 2 is an exploded view of the various components of the motor-fan unit object of the present invention, wherein there is integrated partition, disposed between the motor support and the motor.
• FIG. 3 is a front view of a first embodiment of the motor-fan unit that is the subject of the invention for an HVAC unit, in which the partition made of foam has been integrated, and it corresponds to the same situation. of the same fan motor group as in FIG. 1B, with a smaller motor, e.g. 60 mm diameter and 250 W, in an engine mount designed for a larger engine.
• a smaller motor e.g. 60 mm diameter and 250 W
• FIG. 4 is a front view of a second embodiment of the same motor-fan unit object of the invention as in the previous figure, but with the difference that in this case the partition wall is made from a plastic film, with a slightly smaller thickness.
• Figure 5 is a perspective view of an embodiment of the partition wall.
• FIG. 6 is a sectional top view of the motor-fan group object of the invention, on which is discerned the partition wall mounted on the motor support.
• FIG. 7 shows three different views of different positions of the mounting of the partition wall: FIG. 7A shows the initial position of the partition wall on the lower part of the engine support, with a first peripheral contact area C1 between the two parts, more precisely between the outermost part of the partition wall and an inner wall of the engine support; Figure 7B shows the following mounting position, in which the engine is placed on said partition wall; and FIG.
• FIG. 7C shows the third mounting position, in which the central part of the partition wall has deformed downwards under the weight of the engine, so that two other contact zones are created: a second peripheral zone of contact C2 between the end portion at the bottom of the motor and the central zone of the partition wall, and a third peripheral contact zone C3 between another wall of the motor support and another outer peripheral zone of the partition wall.
• Figure 8 shows a graph of temperature versus time in two different situations: with and without the partition wall in a 61 mm diameter motor (type "EP”) built into an engine mount designed for a larger engine. 73 mm in diameter (type "DPO”) Description of a preferred embodiment
• motor-fan unit 10 An embodiment of the motor-fan unit 10 is described below with reference to FIGS. 1 to 7.
• the conventional motor-fan unit 10 for an HVAC unit in which the motor support is designed with measurements specific to a given electrical fan motor, in this case 75 mm in diameter and 320 in diameter. W, has an air flow A that reaches the brushes 2 and cools them properly.
• FIG. 1B the same motor-fan unit 10 is shown as in FIG. 1A, but where replaced the motor 2 'of 75 mm and 320 W by a smaller motor 2 ", 60 mm diameter and 250 W.
• the air flow A does not reach the brushes of the motor 2 since it escapes through the lower part (see the dashed arrow).
• FIG. 2 shows an exploded view of the various components constituting the motor-fan unit 10 for an HVAC unit, in which the partition wall 5 according to the present invention has been integrated, arranged between a motor support 3 and an electric motor 2.
• Figures 3 and 4 can be seen the partition wall 5 already mounted within a possible engine support 3, more precisely installed in a disposition perpendicular to the axis 6 of the engine 2 and at the height of the lower end 6a of the engine 2. As it covers a large part or the entire space between the lower end 6a of the engine 2 and the inner peripheral zone of the engine support part 3 which is at the height of the end bottom of the engine, the area is closed, or almost closed, so that the air flow A does not escape through the lower zone of the engine support 3 and goes to the engine 2 and its brushes.
• FIGS. 3 and 4 show two different embodiments of the partition wall 5: in FIG. 3 it is made from foam having a thickness of preferably between 4 and 6 mm, and in FIG. in plastic film having a thickness preferably between 0.5 and 2 mm.
• the partition wall 5 which illustrates an embodiment of the partition wall 5, constituted by a substantially circular surface, with the upper and lower surfaces plane to the origin, thin and provided with a central orifice 8 for the passage of the lower end 6a of the axis of the motor 3.
• the body of the partition wall 5 has in its outer peripheral zone 7 a slot 11, the rectangular plane, which emerges from its outer contour to the interior, and whose role is to ensure the correct assembly of the partition wall.
• Said slot 11 is always mounted in the same position relative to the engine support 3 (see Figure 6).
• the body of the partition wall 5 has various cutting lines 9 which emerge from the outer contour 7 towards the inner part of the body.
• FIGS. 7A to 7C illustrate, in one embodiment, the mounting in three distinct steps of the partition wall 5 ': the body of the initially planar foam partition wall 5' is supported by its peripheral portion more external on an inner part of the support motor 3 and constitutes a first contact zone C1, the partition wall being higher than the position that must have the engine (Fig 7A), and immediately after we start to introduce from the top the engine 2 (FIG 7B) until it reaches its final position inside the engine support 3 and in this position it pushes the central part of the partition 5 ', which makes it acquire a slightly convex final shape (Fig.
• the partition wall has, in its outermost part, two distinct peripheral contact zones with the lower part of the engine support (peripheral zones C1 and C3) and, in its part the innermost one, a peripheral contact zone C2 with the lower part 6a of the axis of the motor.
• these three distinct peripheral contact zones C1, C2 and C3 of the partition wall 3, which may be more or less peripheral contact zones of the partition wall 3 with the motor support and / or the motor, guarantee that creates a very firm, strong and efficient contact and coupling between motor support 3 - partition 5 - motor 2, which in this way reduces the excess air volume and therefore significantly improves the cooling of a small engine inside the engine mount designed for a larger engine.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Air-Conditioning For Vehicles (AREA)

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Publications (1)

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Family Applications (1)

Country Status (2)

Cited By (1)

Citations (4)

Family Cites Families (4)

• 2017
  • 2017-09-29 ES ES201731162A patent/ES2706541B2/es not_active Expired - Fee Related
• 2018
  • 2018-09-28 WO PCT/EP2018/076431 patent/WO2019063776A1/fr active Application Filing

Patent Citations (4)

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