EP1953360A1 - Heating-type reservoir tank - Google Patents
Heating-type reservoir tank Download PDFInfo
- Publication number
- EP1953360A1 EP1953360A1 EP06811798A EP06811798A EP1953360A1 EP 1953360 A1 EP1953360 A1 EP 1953360A1 EP 06811798 A EP06811798 A EP 06811798A EP 06811798 A EP06811798 A EP 06811798A EP 1953360 A1 EP1953360 A1 EP 1953360A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall portion
- slits
- outer circumferential
- central
- vessel
- 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.)
- Withdrawn
Links
- 238000005192 partition Methods 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims description 3
- 239000002826 coolant Substances 0.000 description 28
- 238000000926 separation method Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Images
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
- 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
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0231—Header boxes having an expansion chamber
-
- 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
- F01P11/029—Expansion reservoirs
-
- 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
- F01P2060/10—Fuel manifold
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
- F28D2021/0091—Radiators
- F28D2021/0094—Radiators for recooling the engine coolant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/14—Safety or protection arrangements; Arrangements for preventing malfunction for preventing damage by freezing, e.g. for accommodating volume expansion
Definitions
- the present invention relates to a pressure type reserve tank, and in particular relates to a structure thereof with improved pressure resistance.
- the pressure type reserve tank of this kind is provided with a pressure cap for blocking out an inner space thereof from open air so as to apply pressure to an interior of the reserve tank, thereby obtaining a sealing structure that can perfectly seal up coolant contained therein. Therefore, the pressure type reserve tank is different from an open type one, in that the coolant is circulated in the coolant circuit, having the pressure type reserve tank as a part thereof, in a state that the coolant is free from contact with the open air so that the coolant can be prevented from reduction in quantity due to its vaporization and also prevented from its degradation due to contact and reaction with the open air.
- the conventional reserve tank of the latter related art is normally constructed so that an interior space of the reserve tank is defined into a plurality of chambers in a lattice arrangement by using a plurality of partition wall portions.
- the partition wall portions defining each chamber are formed with a slit through which the gas-liquid mixed coolant can freely flow between the adjacent chambers, so that the gas and the liquid can be separated from each other when the gas-liquid mixed coolant flows through the slit.
- the pressure type tank can separate the gas contained in the coolant circuit into the gas and the liquid, thereby improving gas-liquid separation performance and others compared to those obtained by using the open type one.
- the conventional pressure type reserve tank encounters a problem in that stress concentration could occur in a specific portion of the partition wall portions due to application of internal pressure, because the interior space is divided into chambers arranged in the lattice arrangement by using the plurality of partition wall portions formed with the slits. This stress concentration could cause a crack and/or destruction of the partition walls.
- one way of improving the rigidity of the partition wall portions would be to use a partition wall formed to be larger in thickness and /or to reduce the length of the slits thereof.
- the former measures causes its material cost and weight to be increased, and the latter measures causes the gas-liquid separation performance to be deteriorated, due to a lower amount of coolant that comes and goes between the adjacent chambers.
- the present invention is made to prevent the above-described problems, and its object is to provide a pressure type reserve tank which can decrease stress concentration due to internal pressure in the pressure type reserve tank and improve a gas-liquid separation performance thereof.
- a pressure type reserve tank which includes a liquid-tight outer circumferential wall portion which contains liquid in a sealed state, a central wall portion which is shaped in a substantially circular cylinder to form a central chamber therein and is arranged in the center of an inner space of the outer circumferential wall portion, and a plurality of partition wall portions which radially extend from the central wall portion to the outer circumferential wall portion to define a plurality of outer circumferential chambers formed between the central wall portion and the outer circumferential wall portion and around the central chamber.
- a plurality of slits is provided on the central wall portion to fluidically communicate the central chamber and the outer circumferential chambers with each other.
- the central wall portion arranged in the center of the reserve tank, and the partition wall portions, radially extending from the central wall portion to the outer circumferential wall portion to define the plurality of outer circumferential chambers, slits being formed on the central wall portion to fluidically communicate the central chamber and the outer circumferential chambers. Therefore, the internal pressure to be applied can be uniformly dispersed from the central wall portion to the outer circumferential wall portions, so that the stress concentration due to the internal pressure can be avoided.
- the slit can be set to an optimum length, thereby increasing the gas-liquid separation performance in the pressure type reserve tank of the present invention.
- the pressure type reserve tank of the embodiment has a tank main body TA which consists of an upper vessel 1 and a lower vessel 2.
- first to five upper tank chambers 5a to 5e are defined in the upper vessel 1, where they are formed by an upper circular-cylinder wall portion 3 and first to fourth upper partition wall portions 4a to 4d.
- the upper circular-cylinder wall portion 3 is arranged in the center of an inner space of the upper vessel 1, and the first to fourth upper partition wall portions 4a to 4d extend radially from the upper circular-cylinder wall portion 3 to an upper outer circumferential wall portion 1a of the upper vessel 1.
- the first upper tank chamber 5a is formed in the center of the upper vessel 1
- the second to fifth upper tank chambers 5b to 5e are arranged around the upper circular-cylinder wall portion 3.
- a flange portion F1 is integrally formed on a lower end portion of the upper outer circumferential wall portion 1a at its opening side.
- First to fourth slits 6a to 6d are formed, to be vertically long, on a lower portion of the upper circular-cylinder portion 3 at their positions which are away from portions connecting the upper circular-cylinder portion 3 and the upper partition wall portions 4a to 4d with each other, having a predetermined depth (a slit length) of the slits 6a to 6d.
- These first to fourth slits 6a to 6d fluidically communicate the first upper tank chamber 5a with the second to fifth upper tank chambers 5b to 5e, respectively.
- An inlet port P1 is formed in the shape of a cylinder, laterally projecting from the outer circumferential wall portion 1a, so as to fluidically communicate with an interior of the second upper tank chamber 5b, and a pressure-cap attachment port C1 is formed in a shape of a cylinder, projecting upward from the outer circumferential wall portion 1a, so as to fluidically communicate with the fourth upper tank chamber 5d.
- first to five lower tank chambers 9a to 9e are defined in the lower vessel 2, where they are formed by a lower circular-cylinder wall portion 7 and first to fourth lower partition wall portions 8a to 8d.
- the lower circular-cylinder wall portion 7 is arranged in the center of an inner space of the lower vessel 2, and the first to fourth lower partition wall portions 8a to 8d extend radially from the lower circular-cylinder wall portion 7 to a lower outer circumferential wall portion 2a of the lower vessel 2.
- the first lower tank chamber 9a is formed in the center of the lower vessel 2
- the second to fifth lower tank chambers 9b to 9e are arranged around the lower circular-cylinder wall portion 7.
- a flange portion F2 is integrally formed on a lower end portion of the lower outer circumferential wall portion 2a at its opening side.
- First to fourth slits 10a to 10d are formed, to be vertically long, on an upper portion of the lower circular-cylinder portion 7 at their positions which are away from portions connecting the lower circular-cylinder portion 7 and the lower partition wall portions 8a to 8d with each other, having a predetermined depth (a slit length) of the slits 10a to 10d.
- These first to fourth slits 10a to 10d fluidically communicate the first lower tank chamber 9a with the second to fifth lower tank chambers 9b to 9e, respectively.
- the first to fourth slits 6a to 6d of the upper vessel 1 and the first to fourth slits 10a to 10d are formed at positions where they do not overlap when the upper vessel 1 and the lower vessel 2 are coupled with each other.
- An outlet port P2 is formed in a shape of a cylinder, laterally projecting from the lower outer circumferential wall portion 2a to fluidically communicate with the fourth lower tank chamber 9d.
- the upper circular-cylinder wall portion 3 and the lower circular-cylinder wall portion 7 correspond to a central wall portion of the present invention.
- the upper vessel 1 and the lower vessel 2 are made of plastic material, and they are formed by using upper and lower dies so that the tank main body TA is integrally formed by the following manufacturing processes.
- the flange portion F1 of the upper vessel 1 and the flange portion F2 of the lower vessel 2 face each other, and then the both flange portions F1 and F2, the upper and lower circular-cylinder wall portions 3 and 7, and the upper partition wall portions 4a-4d and 8a-8d are heated to be melted to be joined with one another at an adhesion portion PK as shown in FIG. 7 .
- a chamber 13a is formed inside a circular-cylinder wall portion 11 and four chambers 13b to 13e are formed by four partition wall portions 12 which are arranged around the chamber 13a, where the circular-cylinder wall portion 11 consists of the upper and lower circular-cylinder wall portions 3 and 7, and the four partition wall portions 12 consist of the upper and lower partition wall portions 4a to 4d and 8a to 8d,
- the chamber 13a corresponds to a central chamber of the present invention
- the chambers 13b to 13e correspond to outer circumferential chambers of the present invention.
- the slits 6a to 6d formed on the upper vessel 1 have a vertically long configuration where lower-end openings thereof are blocked off by upper end portions of the lower circular-cylinder portions 7, while the slits 10a to 10d formed on the lower vessel 2 have a vertically long configuration where upper-end openings thereof are blocked off by lower end portions of the lower circular-cylinder portions 3. Consequently, the chamber 13 fluidically communicates with the chambers 13b to 13e through the vertically long slits 6a to 6d and 10a to 10d, respectively.
- the inner space of the tank main body TA of the embodiment is divided into the plurality of chambers 13a to 13e by the upper and lower outer circumferential wall portions 1 a and 2a, the circular-cylinder wall portion 11 arranged in the center of the internal space, and the partition wall portions 12 radially extending from the circular-cylinder wall portion 11 to the outer circumferential wall portions 1a and 1b.
- the slits 6a to 6d and the slits 10a to 10d are provided so that the chamber 13a formed in the circular-cylinder wall portion 11 can fluidically communicate with the chambers 13b to 13e adjacent to the chamber 13a through the slits 6a to 6d and the slits 10a to 10d.
- the thus-constructed pressure type reserve tank is installed, in parallel with the radiator 21, in a coolant circuit CC which fluidically connects an engine 20 and a radiator 21 with each other so as to flow coolant CL therebetween.
- the inlet port P1 of the pressure type reserve tank is fluidically connected with a coolant-discharge-side part, where the coolant CL is discharged from the engine 20, of the coolant circuit CC, while the outlet port P2 is fluidically connected with an intermediate portion, which is located between a thermostat 22 and a water pump 23, of a coolant-flow-in-side part, where the coolant CL flows in the engine, in the coolant circuit CC.
- a pressure cap C attached to the pressure-cap attachment port Cl keeps the internal pressure in the inner space of the tank main body TA at approximately 1 Kg/cm 2 for example.
- the gas-liquid mixed coolant CL entering the chamber 13b from the inlet port P1 flows into the chamber 13a through the slits 6a and 10a, and then the coolant CL in the chamber 13a is separated and flows into the chambers 13c to 13e at the same time through the slits 6b to 6d and 10b to 10d, respectively.
- the gas and the liquid are substantially separated from each other while the coolant CL passes through the chambers 13a to 13e, and then the coolant CL is discharged from the outlet port P2.
- the internal pressure can be uniformly dispersed at the central wall portion 11 and the outer circumferential wall portions 1a and 1b, so that the stress concentration due to the internal pressure can be avoided because the inner space of the tank main body TA is divided into the plurality of chambers 13a to 13e by the circular-cylinder wall portion 11 and the partition wall portions 12 which extend from the circular-cylinder wall portion 11 to the outer circumferential wall portions 1a and 2a.
- the pressure type tank body of the embodiment has the following effects.
- the inner space of the tank main body TA is divided into the plurality of chambers 13a to 13e by the circular-cylinder wall portion 11, which is formed in a substantially circular cylinder and arranged in the center of the inner space, and the partition wall portions 12 which extend from the circular-cylinder wall portion 11 to the outer circumferential wall portions 1a and 2a. This can remove the stress concentration due to the internal pressure, improving the gas-liquid separation performance of the reserve tank.
- the circular-cylinder wall portion 11 tends to decrease its rigidity due to the existence of the slits 6a to 6d and 10a to 10d, its rigidity can be sufficiently improved by using the partition wall portions 12 for supporting the circular-cylinder wall portion 11.
- This enables the circular-cylinder wall portion 11 to be free from a crack and/or destruction therein even when the circular-cylinder wall portion 11 and the partition wall portions 12 have the same thicknesses as those of the conventional ones or when they have thicknesses smaller than those of the conventional ones.
- the coolant CL in the chamber 13a flows into the chambers 13c to 13e through the slits 6b to 6d and 10b to 10d at the same time, where the gas-liquid mixed coolant CL can be gas-liquid separated more efficiently because of the simultaneous communication of the coolant CL in a gas-liquid state, as opposed to sequential communication, thereby further improving the gas-liquid separation performance.
- the number of divided chambers formed in the tank main body TA can be set appropriately, and the configuration, the number and positions of the slits can also be set appropriately.
- the circular-cylinder wall portion 11 might be changed into, for example, a hexagonal-cylinder wall portion or an octagonal-cylinder wall portion, it is not desirable to form angled corners because of stress concentration on the corners. In such cases, their corners are preferably formed to be rounded so as to avoid the stress concentration in the corners.
- the pressure type reserve tank of the present invention is adaptable to a tank, the inner space of which is sealed and pressurized, for separating gas, such as air, from liquid medium such as coolant, where the tank is used for a radiator of a motor vehicle or the like.
Abstract
A pressure type reserve tank (TA) includes a liquid-tight outer circumferential wall portion (1a, 2a) hermetically containing liquid, a central wall portion (3, 7; 11), arranged in the center of an inner space of the outer circumferential wall portion (1a, 2a), having a substantially circular cylinder shape for forming a circular-cylindrical central chamber (5a, 9a), and a plurality of partition wall portions (4a to 4d, 8a to 8d; 12) radially extending from the central wall portion (3, 7; 12) to the outer circumferential wall portion (1a,2a) to define a plurality of outer circumferential chambers (5a to 5e, 9b to 9e) formed between the central wall portion (3, 7; 11) and the outer circumferential wall portion (1a, 2a) and around the central chamber (5a, 9a). A plurality of slits (6a to 6d, 10a to 10d) is provided on the central wall portion (3, 7; 11) to fluidically communicate the central chamber (5a, 9a) and the outer circumferential chambers (5a to 5e, 9b to 9e).
Description
- The present invention relates to a pressure type reserve tank, and in particular relates to a structure thereof with improved pressure resistance.
- Conventionally, in order to properly adjust the amount of coolant and internal pressure in a radiator used for a motor vehicle or the like, technology is known, in which a pressure type reserve tank is provided in a coolant circuit connecting an engine to the radiator. Such technology is disclosed in Japanese utility model application laying-open No.
(Jikkaisho) 61 - 94232 (Tokkaihei) 6 - 146883 - The pressure type reserve tank of this kind is provided with a pressure cap for blocking out an inner space thereof from open air so as to apply pressure to an interior of the reserve tank, thereby obtaining a sealing structure that can perfectly seal up coolant contained therein.
Therefore, the pressure type reserve tank is different from an open type one, in that the coolant is circulated in the coolant circuit, having the pressure type reserve tank as a part thereof, in a state that the coolant is free from contact with the open air so that the coolant can be prevented from reduction in quantity due to its vaporization and also prevented from its degradation due to contact and reaction with the open air.
On the other hand, the conventional reserve tank of the latter related art is normally constructed so that an interior space of the reserve tank is defined into a plurality of chambers in a lattice arrangement by using a plurality of partition wall portions. The partition wall portions defining each chamber are formed with a slit through which the gas-liquid mixed coolant can freely flow between the adjacent chambers, so that the gas and the liquid can be separated from each other when the gas-liquid mixed coolant flows through the slit. As described above, the pressure type tank can separate the gas contained in the coolant circuit into the gas and the liquid, thereby improving gas-liquid separation performance and others compared to those obtained by using the open type one. - The conventional pressure type reserve tank, however, encounters a problem in that stress concentration could occur in a specific portion of the partition wall portions due to application of internal pressure, because the interior space is divided into chambers arranged in the lattice arrangement by using the plurality of partition wall portions formed with the slits. This stress concentration could cause a crack and/or destruction of the partition walls.
- In order to prevent such damage, one way of improving the rigidity of the partition wall portions would be to use a partition wall formed to be larger in thickness and /or to reduce the length of the slits thereof. However, the former measures causes its material cost and weight to be increased, and the latter measures causes the gas-liquid separation performance to be deteriorated, due to a lower amount of coolant that comes and goes between the adjacent chambers.
- The present invention is made to prevent the above-described problems, and its object is to provide a pressure type reserve tank which can decrease stress concentration due to internal pressure in the pressure type reserve tank and improve a gas-liquid separation performance thereof.
- According to an aspect of the present invention there is provided a pressure type reserve tank, which includes a liquid-tight outer circumferential wall portion which contains liquid in a sealed state, a central wall portion which is shaped in a substantially circular cylinder to form a central chamber therein and is arranged in the center of an inner space of the outer circumferential wall portion, and a plurality of partition wall portions which radially extend from the central wall portion to the outer circumferential wall portion to define a plurality of outer circumferential chambers formed between the central wall portion and the outer circumferential wall portion and around the central chamber. A plurality of slits is provided on the central wall portion to fluidically communicate the central chamber and the outer circumferential chambers with each other.
- In the pressure type reserve tank of the present invention, there are provided the central wall portion, arranged in the center of the reserve tank, and the partition wall portions, radially extending from the central wall portion to the outer circumferential wall portion to define the plurality of outer circumferential chambers, slits being formed on the central wall portion to fluidically communicate the central chamber and the outer circumferential chambers. Therefore, the internal pressure to be applied can be uniformly dispersed from the central wall portion to the outer circumferential wall portions, so that the stress concentration due to the internal pressure can be avoided. In addition, the slit can be set to an optimum length, thereby increasing the gas-liquid separation performance in the pressure type reserve tank of the present invention.
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FIG. 1 is a plan view showing a pressure type reserve tank of a first embodiment according to the present invention; -
FIG. 2 is a perspective view showing the pressure type reserve tank of the first embodiment shown inFIG. 1 ; -
FIG. 3 is an exploded perspective view showing the pressure type reserve tank of the first embodiment shown inFIGS. 1 and2 ; -
FIG. 4 is a view, seen along an arrow X inFIG. 3 , illustrating an interior of an upper vessel constituting the pressure type reserve tank of the first embodiment shown inFIGS. 1 to 3 ; -
FIG. 5 is a view, seen along an arrow Y inFIG. 3 , illustrating an interior of a lower vessel constituting the pressure type reserve tank of the first embodiment shown inFIGS. 1 to 3 ; -
FIG. 6 is a schematic diagram illustrating the interior of the pressure type reserve tank; -
FIG. 7 is a cross sectional view taken along a line S7 - S7 inFIG. 1 ; and -
FIG. 8 is a diagram showing a coolant circuit which is adapted to the pressure type reserve tank of the first embodiment. -
- C pressure cap
- C1 pressure-cap attachment port
- F1, F2 flange portion
- P1 inlet port
- P2 outlet port
- CL coolant
- CC coolant circuit
- 1 upper vessel
- 1a outer circumferential wall portion
- 2 lower vessel
- 2a outer circumferential wall portion
- 3 upper circular-cylinder wall portion
- 4a, 4b, 4c, 4d first to fourth upper partition wall portion
- 5a, 5b, 5c, 5d, 5e first to fifth upper tank chamber
- 6a, 6b, 6c, 6d, 10a, 10b, 10c, 10d slit
- 7 lower circular-cylinder wall portion
- 8a, 8b, 8c, 8d first to fourth lower partition wall portion
- 9a, 9b, 9c, 9d first to fifth lower tank chamber
- 11 circular-cylinder wall portion
- 12 partition wall portion
- 13a, 13b, 13c, 13d, 13e chamber
- 20 engine
- 21 radiator
- 22 thermostat
- 23 water pump
- Hereinafter, a pressure type reserve tank of an embodiment according to the present invention will be described with reference to the accompanying drawings.
- First, an entire construction of the pressure type reserve tank of the embodiment will be described.
As shown inFIGS. 1 to 3 , the pressure type reserve tank of the embodiment has a tank main body TA which consists of anupper vessel 1 and alower vessel 2. - As shown in
FIGS. 3 and4 , first to fiveupper tank chambers 5a to 5e are defined in theupper vessel 1, where they are formed by an upper circular-cylinder wall portion 3 and first to fourth upperpartition wall portions 4a to 4d. The upper circular-cylinder wall portion 3 is arranged in the center of an inner space of theupper vessel 1, and the first to fourth upperpartition wall portions 4a to 4d extend radially from the upper circular-cylinder wall portion 3 to an upper outercircumferential wall portion 1a of theupper vessel 1. Specifically, in theupper vessel 1, the firstupper tank chamber 5a is formed in the center of theupper vessel 1, and the second to fifthupper tank chambers 5b to 5e are arranged around the upper circular-cylinder wall portion 3. A flange portion F1 is integrally formed on a lower end portion of the upper outercircumferential wall portion 1a at its opening side.
First tofourth slits 6a to 6d are formed, to be vertically long, on a lower portion of the upper circular-cylinder portion 3 at their positions which are away from portions connecting the upper circular-cylinder portion 3 and the upperpartition wall portions 4a to 4d with each other, having a predetermined depth (a slit length) of theslits 6a to 6d. These first tofourth slits 6a to 6d fluidically communicate the firstupper tank chamber 5a with the second to fifthupper tank chambers 5b to 5e, respectively.
An inlet port P1 is formed in the shape of a cylinder, laterally projecting from the outercircumferential wall portion 1a, so as to fluidically communicate with an interior of the secondupper tank chamber 5b, and a pressure-cap attachment port C1 is formed in a shape of a cylinder, projecting upward from the outercircumferential wall portion 1a, so as to fluidically communicate with the fourthupper tank chamber 5d. - As shown in
FIGS. 3 and5 , first to fivelower tank chambers 9a to 9e are defined in thelower vessel 2, where they are formed by a lower circular-cylinder wall portion 7 and first to fourth lowerpartition wall portions 8a to 8d. The lower circular-cylinder wall portion 7 is arranged in the center of an inner space of thelower vessel 2, and the first to fourth lowerpartition wall portions 8a to 8d extend radially from the lower circular-cylinder wall portion 7 to a lower outercircumferential wall portion 2a of thelower vessel 2. Specifically, in thelower vessel 2, the firstlower tank chamber 9a is formed in the center of thelower vessel 2, and the second to fifthlower tank chambers 9b to 9e are arranged around the lower circular-cylinder wall portion 7. A flange portion F2 is integrally formed on a lower end portion of the lower outercircumferential wall portion 2a at its opening side.
First tofourth slits 10a to 10d are formed, to be vertically long, on an upper portion of the lower circular-cylinder portion 7 at their positions which are away from portions connecting the lower circular-cylinder portion 7 and the lowerpartition wall portions 8a to 8d with each other, having a predetermined depth (a slit length) of theslits 10a to 10d. These first tofourth slits 10a to 10d fluidically communicate the firstlower tank chamber 9a with the second to fifthlower tank chambers 9b to 9e, respectively.
The first tofourth slits 6a to 6d of theupper vessel 1 and the first tofourth slits 10a to 10d are formed at positions where they do not overlap when theupper vessel 1 and thelower vessel 2 are coupled with each other.
An outlet port P2 is formed in a shape of a cylinder, laterally projecting from the lower outercircumferential wall portion 2a to fluidically communicate with the fourthlower tank chamber 9d. - Incidentally, the upper circular-
cylinder wall portion 3 and the lower circular-cylinder wall portion 7 correspond to a central wall portion of the present invention. - The
upper vessel 1 and thelower vessel 2 are made of plastic material, and they are formed by using upper and lower dies so that the tank main body TA is integrally formed by the following manufacturing processes. The flange portion F1 of theupper vessel 1 and the flange portion F2 of thelower vessel 2 face each other, and then the both flange portions F1 and F2, the upper and lower circular-cylinder wall portions partition wall portions 4a-4d and 8a-8d are heated to be melted to be joined with one another at an adhesion portion PK as shown inFIG. 7 . - Therefore, as schematically shown in
FIG. 6 , in the interior of the tank main body TA, achamber 13a is formed inside a circular-cylinder wall portion 11 and fourchambers 13b to 13e are formed by fourpartition wall portions 12 which are arranged around thechamber 13a, where the circular-cylinder wall portion 11 consists of the upper and lower circular-cylinder wall portions partition wall portions 12 consist of the upper and lowerpartition wall portions 4a to 4d and 8a to 8d, Incidentally, thechamber 13a corresponds to a central chamber of the present invention, and thechambers 13b to 13e correspond to outer circumferential chambers of the present invention. - As shown in
FIG. 7 , theslits 6a to 6d formed on theupper vessel 1 have a vertically long configuration where lower-end openings thereof are blocked off by upper end portions of the lower circular-cylinder portions 7, while theslits 10a to 10d formed on thelower vessel 2 have a vertically long configuration where upper-end openings thereof are blocked off by lower end portions of the lower circular-cylinder portions 3. Consequently, the chamber 13 fluidically communicates with thechambers 13b to 13e through the verticallylong slits 6a to 6d and 10a to 10d, respectively. - Therefore, the inner space of the tank main body TA of the embodiment is divided into the plurality of
chambers 13a to 13e by the upper and lower outercircumferential wall portions cylinder wall portion 11 arranged in the center of the internal space, and thepartition wall portions 12 radially extending from the circular-cylinder wall portion 11 to the outercircumferential wall portions 1a and 1b. Theslits 6a to 6d and theslits 10a to 10d are provided so that thechamber 13a formed in the circular-cylinder wall portion 11 can fluidically communicate with thechambers 13b to 13e adjacent to thechamber 13a through theslits 6a to 6d and theslits 10a to 10d. - The thus-constructed pressure type reserve tank is installed, in parallel with the
radiator 21, in a coolant circuit CC which fluidically connects anengine 20 and aradiator 21 with each other so as to flow coolant CL therebetween.
Specifically, the inlet port P1 of the pressure type reserve tank is fluidically connected with a coolant-discharge-side part, where the coolant CL is discharged from theengine 20, of the coolant circuit CC, while the outlet port P2 is fluidically connected with an intermediate portion, which is located between athermostat 22 and awater pump 23, of a coolant-flow-in-side part, where the coolant CL flows in the engine, in the coolant circuit CC. - Next, the operation of the pressure type reserve tank of the embodiment will be described.
A pressure cap C attached to the pressure-cap attachment port Cl keeps the internal pressure in the inner space of the tank main body TA at approximately 1 Kg/cm2 for example. The gas-liquid mixed coolant CL entering thechamber 13b from the inlet port P1 flows into thechamber 13a through theslits chamber 13a is separated and flows into thechambers 13c to 13e at the same time through theslits 6b to 6d and 10b to 10d, respectively. The gas and the liquid are substantially separated from each other while the coolant CL passes through thechambers 13a to 13e, and then the coolant CL is discharged from the outlet port P2. - In this process, the internal pressure can be uniformly dispersed at the
central wall portion 11 and the outercircumferential wall portions 1a and 1b, so that the stress concentration due to the internal pressure can be avoided because the inner space of the tank main body TA is divided into the plurality ofchambers 13a to 13e by the circular-cylinder wall portion 11 and thepartition wall portions 12 which extend from the circular-cylinder wall portion 11 to the outercircumferential wall portions - The pressure type tank body of the embodiment has the following effects.
In the pressure type reserve tank of the embodiment, the inner space of the tank main body TA is divided into the plurality ofchambers 13a to 13e by the circular-cylinder wall portion 11, which is formed in a substantially circular cylinder and arranged in the center of the inner space, and thepartition wall portions 12 which extend from the circular-cylinder wall portion 11 to the outercircumferential wall portions - In this case, although the circular-
cylinder wall portion 11 tends to decrease its rigidity due to the existence of theslits 6a to 6d and 10a to 10d, its rigidity can be sufficiently improved by using thepartition wall portions 12 for supporting the circular-cylinder wall portion 11. This enables the circular-cylinder wall portion 11 to be free from a crack and/or destruction therein even when the circular-cylinder wall portion 11 and thepartition wall portions 12 have the same thicknesses as those of the conventional ones or when they have thicknesses smaller than those of the conventional ones. - In addition, the coolant CL in the
chamber 13a flows into thechambers 13c to 13e through theslits 6b to 6d and 10b to 10d at the same time, where the gas-liquid mixed coolant CL can be gas-liquid separated more efficiently because of the simultaneous communication of the coolant CL in a gas-liquid state, as opposed to sequential communication, thereby further improving the gas-liquid separation performance. - Although the embodiment has been explained as described above, the present invention is not limited to the above-described embodiment and it includes its design change or modification.
- For example, the number of divided chambers formed in the tank main body TA can be set appropriately, and the configuration, the number and positions of the slits can also be set appropriately.
In addition, although the circular-cylinder wall portion 11 might be changed into, for example, a hexagonal-cylinder wall portion or an octagonal-cylinder wall portion, it is not desirable to form angled corners because of stress concentration on the corners. In such cases, their corners are preferably formed to be rounded so as to avoid the stress concentration in the corners. - The entire contents of Japanese Patent Application No.
2005 - 318623 filed on November 1, 2005 - The pressure type reserve tank of the present invention is adaptable to a tank, the inner space of which is sealed and pressurized, for separating gas, such as air, from liquid medium such as coolant, where the tank is used for a radiator of a motor vehicle or the like.
Claims (5)
- A pressure type reserve tank comprising:a liquid-tight outer circumferential wall portion which contains liquid in a sealed state;a central wall portion which is shaped in a substantially circular cylinder to form a central chamber therein and is arranged in the center of an inner space of the outer circumferential wall portion; anda plurality of partition wall portions which radially extend from the central wall portion to the outer circumferential wall portion to define a plurality of outer circumferential chambers formed between the central wall portion and the outer circumferential wall portion and around the central chamber, whereina plurality of slits is provided on the central wall portion to fluidically communicate the central chamber and the outer circumferential chambers with each other.
- The pressure type reserve tank according to claim 1, wherein
the outer circumferential wall portion, the central wall portion, the partition wall portions and the slits are formed on an upper vessel and a lower vessel which are to be coupled with each other. - The pressure type reserve tank according to claim 2, wherein
the slits include slits formed on the upper vessel and slits formed on the lower vessel, the slits of the upper and lower vessels being arranged at positions where the slits of the upper vessel and the slits of the lower vessel can be prevented from fluidically communicating the slits of the upper and lower vessels with each other when the upper and lower vessels are coupled with each other, and
an opening end portion of the slits on the upper vessel and an opening end portion of the slits on the lower vessel are blocked off by the central wall portion formed on the lower vessel and the central wall portion formed on the upper vessel, respectively. - The pressure type reserve tank according to any one of claims 1 to 3, wherein
the slits are formed at positions which are away from the partition wall portions. - The pressure type reserve tank according to any one of claims 1 to 4, wherein
the outer circumferential wall portion, the central wall portion and the partition wall portions are integrally formed of plastic material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005318623A JP4578385B2 (en) | 2005-11-01 | 2005-11-01 | Pressurized reserve tank |
PCT/JP2006/320527 WO2007052461A1 (en) | 2005-11-01 | 2006-10-16 | Heating-type reservoir tank |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1953360A1 true EP1953360A1 (en) | 2008-08-06 |
Family
ID=38005614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06811798A Withdrawn EP1953360A1 (en) | 2005-11-01 | 2006-10-16 | Heating-type reservoir tank |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090095761A1 (en) |
EP (1) | EP1953360A1 (en) |
JP (1) | JP4578385B2 (en) |
WO (1) | WO2007052461A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008309135A (en) * | 2007-06-18 | 2008-12-25 | Calsonic Kansei Corp | Pressure type reserve tank |
JP5782702B2 (en) * | 2010-10-27 | 2015-09-24 | トヨタ自動車株式会社 | Engine cooling system |
JP6475000B2 (en) * | 2014-11-20 | 2019-02-27 | トヨタ自動車株式会社 | Reservoir tank and radiator structure for radiator |
CN105822405A (en) * | 2016-05-26 | 2016-08-03 | 潍柴动力股份有限公司 | Expansion water tank |
JP7211256B2 (en) * | 2019-05-15 | 2023-01-24 | 株式会社デンソー | Reserve tank |
KR20200140117A (en) * | 2019-06-05 | 2020-12-15 | 현대자동차주식회사 | Reservoir tank with integrated ejector |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1077423B (en) * | 1977-07-27 | 1985-05-04 | Alfa Romeo Spa | FUEL TANK FOR A VEHICLE |
IT8153149V0 (en) * | 1981-04-16 | 1981-04-16 | Fiat Auto Spa | FUEL TANK PARTICULARLY PARTLY FOR VEHICLES |
JPS6194232U (en) | 1984-11-27 | 1986-06-18 | ||
JP2950553B2 (en) * | 1989-09-26 | 1999-09-20 | 株式会社日本自動車部品総合研究所 | Internal combustion engine cooling system |
JP3246005B2 (en) | 1992-11-13 | 2002-01-15 | カルソニックカンセイ株式会社 | Pressurized reserve tank |
JPH08226326A (en) * | 1995-02-20 | 1996-09-03 | Nissan Motor Co Ltd | Cooling water reservoir tank for automobile |
JP4066930B2 (en) * | 2003-10-16 | 2008-03-26 | 株式会社デンソー | Gas-liquid separation structure of reserve tank |
JP4321309B2 (en) * | 2004-03-02 | 2009-08-26 | 株式会社デンソー | Reserve tank |
EP1592254A1 (en) | 2004-04-30 | 2005-11-02 | Matsushita Electric Industrial Co., Ltd. | Film mode extrapolation |
-
2005
- 2005-11-01 JP JP2005318623A patent/JP4578385B2/en not_active Expired - Fee Related
-
2006
- 2006-10-16 EP EP06811798A patent/EP1953360A1/en not_active Withdrawn
- 2006-10-16 US US12/083,334 patent/US20090095761A1/en not_active Abandoned
- 2006-10-16 WO PCT/JP2006/320527 patent/WO2007052461A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007052461A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2007052461A1 (en) | 2007-05-10 |
JP2007126994A (en) | 2007-05-24 |
US20090095761A1 (en) | 2009-04-16 |
JP4578385B2 (en) | 2010-11-10 |
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