JPS621655Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention relates to a forced circulation bath kettle device for use in general households.

<Prior art> As shown in Fig. 1, a forced-pressure pump is equipped with a heat exchanger b on the heat source side heated by a combustion burner a, a self-priming circulation pump c, etc., and these are connected to a bathtub f through a circulation pipe d. The circulation type bathtub device e is well known, and this conventional type uses a self-priming pump that secures its own priming water, and for example, the bathtub and the connecting piping are irregularly connected. However, the applicant of the present application proposed a method that eliminates the concern of air pockets in Utility Model Application No. 189168-1983.

<Problems to be solved by the invention> In this conventional system, as shown in Figure 1, the bathtub f is installed at a lower position than the forced circulation bathtub device e, so that when heating a bath, the The water in the bathtub f is sucked through the circulation port g and heated to a high temperature via the self-priming circulation pump c and the heat exchanger b.
The water is returned to the bathtub f through the upper circulation port h to heat the bath. However, when the water level in the bathtub f is drained and the water level drops below the upper circulation port h, air enters the circulation pipe d through the upper circulation port h as shown by the dotted arrow, and is circulated by a siphon effect. The water in the pipe d and the heat exchanger b is discharged into the bathtub f, and at the same time, the priming water that should be secured in the self-priming circulation pump c is also discharged.

Therefore, each time the bath is heated again, the self-priming circulation pump c must be supplied with priming water, which is time-consuming and inconvenient. Therefore, the bathtub f
It was impossible to install the pump under the installation conditions where the pump was located below the self-priming circulation pump c.

<Means for solving the problem> This invention aims to solve the problem of the conventional method by installing a heat exchanger between the lower circulation port and the upper circulation port of the bathtub to exchange heat with the hot water inside the boiler case. A heat exchanger, a self-priming circulation pump, and an auxiliary water tank for securing a constant amount of water for the self-priming circulation pump are connected by a circulation pipe, and the auxiliary water tank is located above the self-priming circulation pump. This invention relates to a forced circulation bathtub device, characterized in that the outflow port side is connected to the suction path side of a self-priming circulation pump, and the inner diameter of the auxiliary water tank is larger than the outflow port to prevent siphon action. .

<Function> When replenishing water in the bathtub 8 and causing the forced circulation bath pot device 1 to be driven for the first time, first remove the lid 22 of the auxiliary water tank 6 and replenish a certain amount of priming water.

This water is stored in the water reservoir chamber 17 of the self-priming circulation pump 5 due to the head difference.

When a power switch (not shown) is turned on in this state, the self-priming circulation pump 5 starts driving.

At this time, the highest water level in the bathtub 8 is at the position indicated by line A, and the self-priming circulation pump 5 is at a slightly higher position, so there is an air pocket in the circulation pipe 7 between this time, but the self-priming circulation pump 5 is at a slightly higher position. The type circulation pump 5 supplies the injection port 1 from the water reservoir chamber 17 which becomes negative pressure due to the rotation of the blades 13.
The stored priming water is injected through 8.

This jet stream repeatedly sucks air from the suction passage 15 side and releases it from the discharge port 19, and the air between the lower circulation port 10 of the bathtub 8 and the lower circulation port 10 is sent to the discharge side and discharged, as indicated by the solid line arrow. The hot water is circulated as shown in the figure, and the hot water in the bathtub 8 is heated to a set temperature. Next, when draining the water from the bathtub 8, the water is gradually drained by removing the stopper, and when the upper circulation port 11 is exposed, the air is circulated by siphon action as shown by the dotted arrow B, which is the opposite of the water circulation. It flows through the pipe 7.

At this time, the water in the circulation pipe 7 is discharged by the siphon action as in the conventional case, but the air flowing in from the outlet 20 at the bottom of the auxiliary water tank 6 has a diameter larger than the inner diameter of the auxiliary water tank 6. Because it is small, the flow velocity in the auxiliary water tank 6 will be slow.
Since the specific gravity of air is lighter than that of water, air creates buoyancy, becomes small bubbles, and rises inward to the upper part.Since the upper part is equipped with an inlet 21 through which air can escape, air is more buoyant than water. It was ejected first,
The water in the auxiliary water tank 6 is not completely discharged, and the amount of water up to the B line is secured enough to prime the self-priming circulation pump 5.

Simultaneously with the completion of the siphon action by the air coming out of the inlet 21, this water flows into the lower self-priming circulation pump 5 by a drop, and is stored as priming water in the water reservoir chamber 17 in preparation for the next drive.

<Embodiment> 1 is a forced circulation type bathtub device having a boiler can 3 heated by a gun-type combustion burner 2; A heat exchanger 4 for exchanging heat with hot water in the tank 3, a self-priming circulation pump 5, an auxiliary water tank 6, and the like are connected in sequence through a circulation pipe 7.

8 is a bathtub installed at a lower position than the forced circulation bath pot device 1, and is connected to the forced circulation bath pot device 1 by a circulation pipe 7 extending from the forced circulation bath pot device 1 through a partition wall 9. The lower circulation port 10 in the lower part is connected to the auxiliary water tank 6 and the self-priming circulation pump 5 side, and the upper circulation port 11 in the upper part is connected to the heat exchanger 4 side.

It goes without saying that the connection may be reversed if necessary.

The self-priming circulation pump 5 includes blades 13 that are rotated by a shaft 12 connected to a motor (not shown), and an inner casing 14 that houses the blades 13. One end is opened in the center of the inner casing 14, and the other end is a circulation pipe. a water reservoir chamber 17 that is connected to the suction passage 15 and the internal casing 14 and stores water in the discharged air water and priming water from the discharge port 16 of the internal casing 14; , the water reservoir chamber 1
7 and the inside of the connecting internal casing 14, and a small-diameter injection port 18 that injects water in the water reservoir chamber 17 by rotation of the blade 13 and sucks it from the suction passage 15.
The water in the air and water discharged from the discharge port 16 is disposed on the heat exchanger 4 side through a discharge port 19 and the like.

Furthermore, when the self-priming circulation pump 5 starts operating, or when there is air inside, it goes without saying that air is sucked in from the suction passage 15 and released from the discharge port 19 in the same way as water.

Further, the auxiliary water tank 6 is provided above the self-priming circulation pump 5 so that the water inside flows into the self-priming circulation pump 5 due to the difference in head, and its structure is such that water flows through the self-priming circulation pump 5 through a short circulation pipe 7. An outflow port 20 communicating with the suction path 15 of the self-priming circulation pump 5 is provided at the bottom, and a lower circulation port 10 of the bathtub 8 with the same diameter as the outflow port 20 is provided on one side of the top.
A removable lid 22 is screwed onto the upper end of the inlet 21, which communicates with the inlet 21 via a circulation pipe 7. It is 5 times larger.

23 is a hot water outlet for hot water supply piping, 24 is a water supply port, 2
5 is the exhaust port.

<Effects of the invention> By installing an auxiliary water tank to prevent the siphon effect, the air is discharged before all the water is discharged, making it possible to always secure a sufficient amount of water for priming. There is no need to replenish water to the circulation pump each time, and even if the bathtub is lower than the forced circulation bathtub device or the self-priming circulation pump, the forced circulation bathtub device can be installed, expanding the installation range. be done.

[Brief explanation of the drawing]

Fig. 1 is a piping diagram of a conventional forced circulation bath kettle device, Fig. 2 is a piping diagram of a forced circulation bath kettle device of an embodiment of this invention, and Fig. 3 is an enlarged sectional view of the same essential parts. 4... Heat exchanger, 5... Self-priming circulation pump, 6
... Auxiliary water tank, 7 ... Circulation pipe, 8 ... Bathtub,
10...Lower circulation port, 11...Upper circulation port, 20...
Outlet, 21... Inlet.

Claims (1)

[Scope of utility model registration request] A heat exchanger 4 for exchanging heat with hot water in the boiler body 3, a self-priming circulation pump 5, and a self-priming circulation pump 5 are installed between the lower circulation port 10 and the upper circulation port 11 of the bathtub 8. The auxiliary water tank 6 is located above the self-priming circulation pump 5, and the outflow port 20 side is connected to the self-priming circulation pump 5. This forced circulation bath kettle device is characterized in that the auxiliary water tank 6 is communicated with the suction passage 15 side, and the inner diameter of the auxiliary water tank 6 is larger than the outlet port 20 to prevent siphon action.