JPH05180514A - Drain discharging passage of bath device - Google Patents

Abstract

PURPOSE:To provide a drain discharging passage of a bath device in which an accommodation for a high head specification for the second floor hot water feeding operation can be embodied a degree of freedom in configuration of the device is improved, and in addition, reliability in operation of equipment is enabled through a simple configuration and its cost can be reduced. CONSTITUTION:A bath device 1 is comprised of a hot water feeding passage 3 for use in feeding hot water and a forced circulation passage 4. The hot water feeding passage 3 has a hot water opening or closing valve 31 and a surrounding air releasing valve 32 from a water feeding port 3a through a heat exchanger 3b and then a venturi part 33 is arranged at a downstream side of it. A drain chamber 32a is connected to the venturi part 33 through the drain discharging passage 32b. The venturi part 33 forms the metering or throat part of which sectional area is continuously varied to reduce its passage resistance and a drain discharging passage 32b is opened at its small diameter part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain discharge path of a bath device, and more particularly, to enable the high head specifications such as hot water supply on the second floor to be improved, and further improve the degree of freedom of the device configuration.
The present invention relates to a drain discharge path for a bath device, which contributes to improved equipment reliability and cost reduction by simplifying its structure.

[0002]

2. Description of the Related Art A hot water supply passage for filling water, an atmosphere release valve for air replacement of the hot water supply passage, and a circulation passage for reheating are provided, and the suction force of a circulation pump of the circulation passage is used to remove the above atmosphere. A bath device that discharges the drain accumulated in the open valve is known. The drain discharge path of this bath device joins the suction side of the circulation pump of the circulation path, and controls the circulation path opening / closing valve and drain discharge valve that are respectively installed in the circulation path and drain discharge path on the upstream side of this confluence point. By switching the flow paths, circulation and drain discharge are performed using a common circulation pump.

[0003]

However, since the common circulation pump is set to have a capacity commensurate with the capacity required for circulation, the pump capacity is insufficient in the case of a bath apparatus requiring a high lift such as hot water supply on the second floor. As a result, it takes a long time to discharge the drain, and in some cases, the drain cannot be discharged. In order to solve this, the pump capacity must be a large capacity circulation pump in accordance with the drain discharge capacity, and therefore, an increase in equipment space and an increase in cost cannot be avoided.

[0004]

In order to solve the above-mentioned problems, a venturi portion forming a narrowing portion whose cross-sectional area continuously changes is provided in a hot water supply channel for filling water in a bath device, and this venturi portion is provided. The drain discharge passage of the atmosphere release valve was opened in the small diameter part of the drain discharge.

[0005]

[Function] When the water is filled through the hot water supply passage for filling water, the velocity of the flow in the venturi portion increases in the small diameter portion and the static pressure decreases, so that the drain in the drain discharge passage opening in the small diameter portion is drained. It is sent to the Venturi section due to the difference between the atmospheric pressure and the static pressure, and is discharged to the hot water supply passage through the opening.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a system diagram of a bath apparatus including a drain discharge passage according to the invention, and FIG. 2 is a sectional view of a main part of the drain discharge passage.

In FIG. 1, a bath device 1 includes a hot water supply passage 3 for filling water, which is interposed between a water supply source (not shown) and a bathtub 2.
A circulation path 4 that shares a part of the hot water supply path 3 is provided. The hot water supply passage 3 is provided with a hot water on-off valve 31 for opening and closing hot water filling from the water supply inlet 3a through the heat exchanger 3b, and an atmosphere opening valve 32 for replacing air in the hot water supply passage 3 with a venturi portion downstream thereof. 33 is installed.

A drain chamber 32a for accumulating the drain of the atmosphere release valve 32 is connected to the venturi section 33 via a drain discharge passage 32b. 3c and 3d are check valves, 3e is a two-way hot water filling valve, and 3f is a branch hot water supply passage.

The circulation path 4 branches from the hot water supply path 3 to reach the bathtub 2 via the circulation pump 4a and the heat exchanger 4b. Reference numeral 4c is a water level gauge for detecting the water level in the bathtub 4, and 4d is a reheating two-way valve.

As shown in FIG. 2, the venturi portion 33 of the hot water supply passage 3 has a taper portion 33a, a small diameter portion 33b following the taper portion 33a, and a taper portion 33 having a relatively small taper angle from the upstream side.
c forms a narrowed portion whose cross-sectional area is continuously changed to reduce the flow path resistance, and the drain discharge passage 32b communicates with the opening 33d of the small diameter portion 33b.

The flow of the Venturi portion 33 has a static pressure which decreases as the velocity increases in the small diameter portion 33b.
The drain in the drain discharge passage 32b opening to the small diameter portion 33b is sent to the venturi portion 33 due to the difference between the atmospheric pressure and the static pressure, and is discharged to the hot water supply passage 3 through the opening 33d.

Next, the operation of the bath device provided with the drain discharge passage will be described. When the hot water opening / closing valve 31 of the hot water supply passage 3 is opened, the bathtub 2 is filled with hot water by the pressure of the water supply source (not shown) from the water supply port 3a. At this time, the atmosphere opening valve 32 is closed by the hot water supply pressure, and the drain at that time is stored in the drain chamber 32a.

On the other hand, a negative pressure is generated in the venturi portion 33 by the fluid flowing through the hot water supply passage 3, and this negative pressure causes the drain of the drain chamber 32a to be discharged to the hot water supply passage 3 through the drain discharge passage 32b. This drain reaches the bathtub 2 together with the fluid in the hot water supply passage 3.

As described above, since the drainage accumulated in the drain chamber is discharged by the water supply pressure of the hot water supply channel without being dependent on the circulation pump, the hot water is supplied to the hot water supply channel. In the case of high head hot water supply, it is not necessary to increase the size of the circulation pump. In this case, by providing a bypass for hot water filling in parallel with the venturi section to separate hot water filling and drain discharge, it is possible to perform high water filling.

Further, in the present invention, it is not necessary to connect the drain discharge system to the suction side of the circulation pump.
Even when the drain is discharged by the hot water supply passage, there is no restriction on the connection of the hot water supply passage, and the degree of freedom in the configuration of the bath device can be improved.

Since the present invention does not require switching of the flow path of the circulation pump for drain discharge, flow path control is simplified, and particularly when applied to a low-lift bath device, It can contribute to reliability improvement and cost reduction.

[0017]

As described above, since the drain discharge passage of the atmosphere release valve for the hot water supply passage is opened in the venturi portion provided in the hot water supply passage for the hot water filling, the venturi portion is provided in the venturi portion every time the hot water is filled. Negative pressure is generated and the drain of the atmosphere release valve is discharged to the hot water supply passage.

Therefore, according to the present invention, the drain accumulated in the drain chamber can be discharged in association with the filling of the water by the water supply pressure without depending on the circulation pump.

As a result, when the present invention is applied to high head hot water supply for supplying water to the bathtub installed on the second floor, it is not necessary to increase the size of the circulation pump. In addition, since it is not necessary to connect the system related to drain discharge to the suction side of the circulation pump, there is no restriction on connection of the hot water supply channel even when drainage is performed by the hot water supply channel, improving the degree of freedom in the configuration of the bath device. can get.

Further, according to the present invention, since it is not necessary to switch the flow path of the circulation pump for drain discharge, flow path control is simplified, and it is possible to contribute to improvement of equipment reliability and cost reduction.

[Brief description of drawings]

FIG. 1 is a system diagram of a bath apparatus including a drain discharge passage according to the invention.

FIG. 2 is a sectional view of the main part of the drain discharge path.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bath device 3 ... Hot water supply passage 4 ... Circulation passage 4a ... Circulation pump 32 ... Atmosphere release valve 32a ... Drain chamber 32b ... Drain discharge passage 33 ... Venturi part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikio Ochi 43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Nihon Yupro Co., Ltd. (72) Inventor Toshiharu Oe 43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo No. Nihonmoto Yupro Co., Ltd. (72) Inventor Shinji Miura 43-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Prefecture Nihon Yupro Co., Ltd. (72) Inventor Junji Hamada 43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Issue Nihon Yupro Co., Ltd.

Claims (1)

[Claims] 1. A bath device comprising a hot water supply passage for filling water and an atmosphere opening valve for air replacement of the hot water supply passage, wherein the hot water supply passage is a venturi portion having a throttle portion whose cross-sectional area continuously changes. The drain discharge path of the bath device, characterized in that the drain discharge path of the atmosphere release valve is opened in the small diameter part of the venturi section for drain discharge.