JP2014118884A - Reserve tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reserve tank with improved gas-liquid separation performance for preventing bubbles from entering a coolant water circuit.SOLUTION: A reserve tank comprises an inlet 12A and an outlet 13A. The reserve tank is divided into a front-center separation chamber 23, a front-left separation chamber 24, a front-right separation chamber 25, a rear-left separation chamber 26, a rear-right separation chamber 27, and a rear-center separation chamber 28. Lower part communication ports 21F1, 21R1, 22F1, 22R12, 20A1, 20B1 are formed for causing coolant water to flow through partition walls that separate a plurality of separation chambers that serve as flow channels from the inlet 12A to the outlet 13A, and, among the partition walls formed by the rear-center separation chamber 28 communicated with the outlet 13A, the lower part communication ports 21R1, 22R1 are arranged at positions such that they face each other in a pair, on the partition walls facing each other across the outlet 13A.

Description

  The present invention relates to a reserve tank, and more particularly to a reserve tank that can prevent air bubbles from entering a cooling water circuit and improve gas-liquid separation performance.

  In recent years, a pressurized reserve tank (degassing tank) for cooling inverter system components of a hybrid vehicle is known. Also, a reserve tank provided in a cooling water circuit between an engine and a radiator for adjusting the pressure of cooling water in the radiator and adjusting the amount of cooling water is known. As shown in FIG. 9, there is a reserve tank 100 in which an outlet 101 is formed at the bottom of the tank and a communication port 104 is formed in the partition wall 103 of the separation chamber 102. In the case of such a structure, a vortex is likely to occur above the outlet 101 due to the positional relationship with other walls where the communication port 104 is not formed. As shown in FIG. 10, when a vortex is generated above the outlet 101, bubbles (air) 105 are easily mixed into the cooling water. As a reserve tank having a structure for preventing the generation of vortex flow, a reserve tank having a plurality of separation chambers inside and having blade pieces as vortex generation suppression means formed on the downstream side of the partition wall is known (for example, Patent Documents). 1).

JP 2005-120906 A

  However, the above-described reserve tank in which wing pieces and the like are formed has a problem of increasing weight and cost. Further, in the above reserve tank, when there is one through hole (a communication port through which cooling water flows) in the partition wall that surrounds the separation chamber having the outlet portion, the generation of vortex flow of cooling water is prevented even if a blade piece is provided. It was difficult to do.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a reserve tank with improved gas-liquid separation performance that prevents air bubbles from being mixed into the cooling water circuit.

  In order to solve the above-described problems and achieve the object, an aspect of the present invention includes an inlet portion for introducing cooling water sent from the engine, an outlet portion for sending cooling water to the engine, and a partition inside. A plurality of separation chambers for performing gas-liquid separation of the cooling water, and a communication port for circulating the cooling water is formed in a partition wall that partitions the plurality of separation chambers that form a flow path from the inlet portion to the outlet portion. Further, in the reserve tank interposed in the cooling water circuit of the engine, of the partition walls constituting the separation chamber provided with the outlet portion, the partition walls facing each other with the outlet portion interposed therebetween make a pair facing each other. A communication port is arranged at a position.

  As described above, when the liquid level of the cooling water stored in the separation chamber is viewed from above, the internal separation chamber is axisymmetric with respect to a straight line passing through the center of the inlet and the center of the outlet. It is preferable that a cooling water flow path is provided in which the cooling water introduced from the inlet portion is sent from the outlet portion through a target path to the reference line.

  As said aspect, it is preferable that the cooling water which flowed from the communicating port which makes the pair formed in the partition of the position which pinched | interposed the exit part in between collides on a reference line.

  As said aspect, it is preferable that the cooling waters which flowed from the communicating ports which make the pair formed in the partition of the position which pinched | interposed the exit part between them collide on the center axis | shaft of an exit part.

  According to the reserve tank according to the present invention, it is possible to realize a reserve tank that can prevent bubbles from being mixed into the cooling water circuit and has high gas-liquid separation performance.

FIG. 1 is an explanatory view showing a cooling water circuit of an engine to which a reserve tank according to an embodiment of the present invention is applied. FIG. 2 is a front view of the reserve tank according to the embodiment of the present invention as viewed from the inlet side. FIG. 3 is a side view of the reserve tank according to the embodiment of the present invention. 4 is a cross-sectional view taken along the line IV-IV in FIG. 5 is a cross-sectional view taken along the line VV in FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. FIG. 7 is a side view showing a modification of the present invention. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. FIG. 9 is a cross-sectional view showing a state in which a conventional reserve tank is cut in the horizontal direction and the lower side is viewed from above. 10 is a cross-sectional view taken along the line XX of FIG.

  Below, the detail of the reserve tank which concerns on embodiment of this invention is demonstrated based on drawing. As shown in FIG. 1, the reserve tank 7 according to the present embodiment is incorporated in a cooling water circuit 1 of the engine.

  As shown in FIG. 1, the cooling water circuit 1 includes an engine 2, a radiator 3, a radiator inlet channel 4 for circulating cooling water from the engine 2 to the radiator 3 side, and cooling water from the radiator 3 to the engine 2 side. A radiator outlet flow path 5, a water pump 6 interposed in the radiator outlet flow path 5, a reserve tank 7, a reserve tank inlet flow path 8 connecting the radiator inlet flow path 4 and the reserve tank 7, and A reserve tank outlet channel 9 connecting the reserve tank 7 and the radiator outlet channel 5;

(Composition of reserve tank)
FIG. 2 is a front view of the reserve tank 7 according to the present embodiment, and FIG. 3 is a side view of the reserve tank 7. As shown in FIGS. 2 and 3, the reserve tank 7 according to the present embodiment includes a rectangular parallelepiped tank main body 10 and a cap 11 attached to the upper part of the tank main body. The tank main body 10 includes an inlet pipe 12 as an inlet portion and an outlet pipe 13 as an outlet portion.

  2 and 3, the tank body 10 includes an upstream upstream plate 14 and a downstream downstream plate 15 that face each other in the front-rear direction, a bottom plate 16 and a top plate 17 that face each other in the vertical direction, Side plates 18 and 19 facing each other.

  As shown in FIGS. 2, 4, and 5, the inlet 12 </ b> A is formed at a position below the central portion of the upstream plate 14 in the vertical direction. The inlet pipe 12 is integrally provided so as to protrude to the outside of the upstream plate 14 so as to communicate with the inlet 12 </ b> A formed in the upstream plate 14. An outlet 13A is formed in the bottom plate 16. As shown in FIG. 4, the outlet 13 </ b> A is disposed on a center line A <b> 1 extending in the front-rear direction at the center in the left-right direction of the bottom plate 16. The outlet 13 </ b> A is formed at a position near the downstream plate 15 in the bottom plate 16.

  As shown in FIGS. 4 and 5, the axis of the inlet pipe 12 is defined as a reference line A2. The reference line A2 is a straight line that is parallel to the center line A1 of the bottom plate 16. A front and rear partition wall 20 is formed in the tank body 10 so as to be disposed in the center in the front-rear direction and to divide the tank body 10 into front and rear parts. In the tank body 10, a left partition wall 21 and a right partition wall 22 are formed so as to extend along the front-rear direction inside the side plates 18 and 19, respectively. As shown in FIG. 4, the left partition wall 21 and the right partition wall 22 are arranged so as to be bilaterally symmetric with respect to the center line A1 and the reference line A2.

  As shown in FIG. 4, the tank body 10 includes a front central separation chamber 23, a front left separation chamber 24, a front right separation chamber 25, and a rear left partition by a front and rear partition wall 20 and a pair of left and right partition walls 21 and 22. A separation chamber 26, a rear right separation chamber 27, and a rear central separation chamber 28 are defined. These front central separation chamber 23, front left separation chamber 24, front right separation chamber 25, rear left separation chamber 26, rear right separation chamber 27, and rear central separation chamber 28 perform gas-liquid separation of cooling water. The front left separation chamber 24, the front right separation chamber 25, the rear left separation chamber 26, and the rear right separation chamber 27 are arranged symmetrically with respect to the reference line A2. As shown in FIG. 4, the above-described outlet 13 </ b> A is disposed at the center in the front-rear direction of the rear center separation chamber 28.

  In the reserve tank 7 according to the present embodiment, the inlet 12A and the front central separation chamber 23 communicate with each other, and the outlet 13A and the rear central separation chamber 28 communicate with each other. In the left partition rear part 21R and the right partition rear part 22R, the lower communication ports 21R1, 22R1 are arranged above the outlet 13A so as to face each other. In the present embodiment, the heights of the lower communication ports 21R1, 22R1 from the bottom plate 16 are both set to the same height as the inlet 12A. The straight line B1 connecting the centers of the lower communication ports 21R1 and 22R1 and the reference line A2 are set to be orthogonal to each other.

  As shown in FIG. 4, lower communication ports 21 </ b> F <b> 1 and 22 </ b> F <b> 1 that are opposed to each other are formed at positions below the central portions in the vertical direction of the left partition front portion 21 </ b> F and the right partition front portion 22 </ b> F. The heights of the centers of the lower communication ports 21F1 and 22F1 are set to the same height as the reference line A2. A lower communication port 20A1 is formed at the same height as the reference line A2 at the lower part of the portion between the left partition 21 and the left side plate 18 in the front and rear partition left side 20L. A lower communication port 20B1 is formed at the same height as the reference line A2 at a lower portion of the front and rear partition right side 20R between the right partition 22 and the right bottom plate 19. As described above, the lower communication ports 21F1, 21R1, 22F1, 22R1, 20A1, and 20B1 are formed in the respective partitions, so that the cooling water introduced from the inlet pipe 12 passes through the target path to the reference line A2 and is discharged to the outlet 13A. To be sent from.

  As shown in FIGS. 5 and 6, the upper part of the front central separation chamber 23, the front left separation chamber 24, the front right separation chamber 25, the rear left separation chamber 26, the rear right separation chamber 27, and the rear central separation chamber 28. They communicate with each other through upper communication ports 21R2, 22F2, 22R2, 20A2, 20B2, and the like as air holes. As shown in FIGS. 5 and 6, the reserve tank 7 is filled with the cooling water W to a level below the upper communication ports 21R2, 22F2, 22R2, 20A2, and 20B2.

  Although the configuration of the reserve tank 7 according to the present embodiment has been described above, the operation of the reserve tank 7 will be described below. As shown in FIG. 1, the cooling water W that has passed through the engine 2 by driving the water pump 6 is introduced from the inlet pipe 12 to the reserve tank 7 via the reserve tank inlet passage 8. As shown by the arrow F1 in the inlet pipe 12 in FIG. 4, the cooling water W introduced from the inlet pipe 12 to the reserve tank 7 first enters the front central separation chamber 23. Then, as indicated by arrows FL and FR in FIG. 4, the cooling water W in the front central separation chamber 23 is formed in the lower communication port 21F1 formed in the left partition front portion 21F and the right partition front portion 22F. It flows into the front left separation chamber 24 and the front right separation chamber 25 through the lower communication port 22F1.

  The cooling water W flowing into the front left separation chamber 24 and the front right separation chamber 25 passes through lower communication ports 20A1 and 20B1 formed in the left and right lower portions of the front and rear partition walls 20, and the rear left separation chamber 26 and the rear It flows into the right side separation chamber 27. As shown by arrows FL and FR in FIGS. 4 and 6, the cooling water W in the rear left separation chamber 26 and the rear right separation chamber 27 passes through the lower communication ports 21R1 and 22R1, respectively. It flows into the separation chamber 28 from the left and right. And it sends out from the exit 13A connected with the rear side center separation chamber 28. FIG. In the reserve tank 7, the cooling water W (FL, FR) is caused to collide with each other, thereby reducing the flow rate of the cooling water W and preventing the generation of vortex flow in the separation chamber (rear side central separation chamber 28). Can do. Furthermore, since the outlet 13A is disposed at a point where the cooling waters W (FL, FR) collide with each other, it is possible to prevent bubbles (air) from being mixed into the cooling water W.

  In the reserve tank 7 according to the present embodiment, when the liquid level of the cooling water W is viewed from above, the cooling water W introduced from the inlet 12A is a reference with respect to the reference line A2 that passes above the center of the outlet 13A. It is set so as to be sent out from the outlet 13A through a path symmetric with respect to the line A2. For this reason, in this reserve tank 7, the flow of the cooling water W flowing in the tank main body 10 is made equal to the left and right, and the cooling water collides in the rear central separation chamber 28 communicating with the outlet 13A in a state where there is no speed difference. For this reason, in this reserve tank 7, generation | occurrence | production of a vortex can be prevented. Furthermore, since the outlet 13A is disposed at a point where the cooling waters W (FL, FR) collide with each other, it is possible to prevent bubbles (air) from being mixed into the cooling water W. Further, in the reserve tank 7, when viewed from above, the straight line B1 connecting the lower communication ports 21R1 and 22R1 facing each other so as to sandwich the outlet 13A is orthogonal to the reference line A2, and the cooling waters W are connected to the reference line. Collide on A2. For this reason, in the reserve tank 7, the flow of the cooling water W can be offset by the collision of the cooling water W from the left and right directions, and the generation of the vortex can be further suppressed.

(Other embodiments)
Although the embodiment has been described above, the present invention is not limited to this. For example, as shown in FIGS. 7 and 8, the outlet 13 </ b> A may be formed in the downstream plate 15 on the rear side of the rear central separation chamber 28 without being formed in the bottom plate 16. In the modification shown in FIGS. 7 and 8, the arrangement is such that the reference line A2 and the center line of the outlet 13A coincide. The remaining configuration of the reserve tank 7A according to this modification is the same as the configuration of the reserve tank 7 according to the above embodiment. Also in the reserve tank 7A of such a modification, the cooling water W (FL, FR) collides with each other to reduce the flow rate of the cooling water W, and the vortex flow in the separation chamber (rear side central separation chamber 28). Can be prevented. Furthermore, since the outlet 13A is arranged at a point where the cooling waters W (FL, FR) collide with each other, it is possible to prevent bubbles (air) from being mixed into the cooling water W.

  For example, in the above embodiment, the number of separation chambers in the tank main body 10 is set to six. However, the number of separation chambers is not limited to this, and various arrangements can be adopted.

A1 Center line A2 Reference line B1 Straight line W Cooling water 1 Cooling water circuit 2 Engine 7 Reserve tank 8 Reserve tank inlet flow path 9 Reserve tank outlet flow path 10 Tank body 12 Inlet pipe 12A Inlet 13 Outlet pipe 13A Outlet 14 Upstream plate 15 Downstream Plate 16 Bottom plate 17 Top plate 18, 19 Side plate 20 Front and rear partition walls 20A1, 20B1 Lower communication port 20A2, 20B2 Upper communication port 20R Front and rear partition wall right side 20L Front and rear partition wall left side 21 Left partition wall 21F Left partition wall front 21R Left partition wall rear 21F1, 21R1, 22F1 22R1 Lower communication port 22 Right partition 22F Right partition front 22R Right partition rear 23 Front central separation chamber 24 Front left separation chamber 25 Front right separation chamber 26 Rear left separation chamber 27 Rear right separation chamber 28 Rear central separation chamber

Claims (4)

An inlet for introducing cooling water delivered from the engine;
An outlet for delivering cooling water to the engine;
A plurality of separation chambers that are partitioned by partition walls and perform gas-liquid separation of cooling water;
With
A communication port was formed through which cooling water circulates in the partition walls that partition the plurality of separation chambers that form a flow path from the inlet portion to the outlet portion.
In a reserve tank interposed in the cooling water circuit of the engine,
Among the partition walls constituting the separation chamber provided with the outlet portion, the communication port is disposed at a position facing the pair of the partition walls facing each other with the outlet portion interposed therebetween. And reserve tank.   When the liquid level of the cooling water stored in the separation chamber is viewed from above, the internal separation chamber is symmetrical with respect to a straight line passing through the center of the inlet and the center of the outlet. 2. The reserve according to claim 1, further comprising a cooling water flow path that is provided and is supplied from the outlet portion through a path in which the cooling water introduced from the inlet portion is symmetrical with respect to the reference line. tank.   The cooling water that has flowed from the communication ports that form a pair formed in the partition wall that is opposed to each other with the outlet portion interposed therebetween collides with each other on the reference line. The reserve tank described.   The cooling waters that have flowed from the communication ports that form a pair formed in the partition wall that are opposed to each other with the outlet portion interposed therebetween collide with each other on the central axis of the outlet portion. The reserve tank according to any one of claims 3 to 4.

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