JPH05180515A - Drain discharging passage for bath device - Google Patents

Abstract

PURPOSE:To provide a drain discharging passage for a bath device capable of contributing to a compact size of the device caused by simplifying the configuration of the device, reducing the cost of equipment used in the device and improving the reliability of operation. CONSTITUTION:A bath device 1 is provided with a hot water feeding passage 3 for use in feeding hot water and a forced circulation passage 4. The hot water feeding passage 3 passes from a water feeding port 31 through a heat exchanger 32 and has a hot water opening or closing valve 33 for use in opening or closing of the hot water feeding and a surrounding air releasing valve 34 for replacing air in the hot water feeding passage 3. The circulation passage 4 passes from a bath tub 2 through a circulation pump 41. The circulation passage 4 is merged with the hot water feeding passage 3 and reaches the bath tub 2 through a heat exchanger 42 and a venturi part 43 at its downstream side. The drain discharging passage 35 communicating from a drain chamber 34a of the surrounding atmosphere releasing valve 34 is opened into a small diameter part of a venturi part 43 of which sectional area is continuously varied and forming a metering part or a throat part reducing the passage resistance.

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 a drain discharge of a bath device which contributes to downsizing of the device by simplifying the device configuration, cost reduction of the device and improvement of reliability. Regarding the road.

[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 this circulation passage is used to open the atmosphere. A bath device that discharges the drain accumulated in the 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, in this case, a circulation path opening / closing valve for switching the flow path in response to circulation and drain discharge, a valve mechanism such as a drain discharge valve, and switching control are performed. Since the valve control unit is required, the device configuration becomes complicated, which is a bottleneck in terms of product cost and operational reliability, and also becomes a factor that prevents the device configuration from being made compact.

[0004]

In order to solve the above-mentioned problems, a venturi portion forming a throttle portion having a continuously changing cross-sectional area is provided on the discharge side of a circulation pump for reheating, and By opening the drain discharge passage of the atmosphere release valve provided in the hot water supply passage in the small diameter portion of the venturi portion, the drain is discharged along with the flow of the circulation passage.

[0005]

[Function] With the flow of the circulation path during reheating, the flow of the venturi portion increases in velocity in the small diameter portion and the static pressure decreases to cause a difference from the atmospheric pressure, and the drain of the atmosphere release valve is drained. It is sent to the venturi section through the discharge passage and discharged from the opening to the circulation passage.

[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 opening / closing valve 33 that opens and closes the hot water supply from the water supply port 31 via the heat exchanger 32 for hot water supply, and an atmosphere opening valve 34 that replaces the hot water supply passage 3 with air.

The circulation passage 4 joins the hot water supply passage 3 from the bathtub 2 through the circulation pump 41, and reaches the bathtub 2 through the heat exchanger 42 for reheating and the venturi portion 43 on the downstream side thereof.

A drain chamber 34a for accumulating the drain of the atmosphere release valve 34 is connected to the venturi section 43 via a drain discharge passage 35. 3a is a branch hot water supply passage, and 3b and 3c are check valves.

As shown in FIG. 2, the venturi portion 43 of the hot water supply passage 3 has a taper portion 43a, a small diameter portion 43b following the taper portion 43a, and a taper portion 43 having a relatively small taper angle from the upstream side.
c forms a throttle portion whose cross-sectional area is continuously changed to reduce the flow path resistance, and the drain discharge passage 35 is connected to the opening 43d of the small diameter portion 43b.

The flow of the Venturi portion 43 has a small diameter portion 43b in which the velocity increases and the static pressure decreases to cause a difference between the atmospheric pressure and the static pressure. The drain in the drain chamber 34a passes through the drain discharge passage 35. It is sent to the venturi section 43 and discharged to the circulation path 4 through the opening 43d.

Next, the operation of the bath device provided with the drain discharge passage will be described. When the hot water on-off valve 33 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 31. At this time, the atmosphere opening valve 34 is closed by the hot water supply pressure, and the drain at that time is stored in the drain chamber 34a.

On the other hand, when the reheating is performed, a negative pressure is generated in the venturi portion 43 by the fluid flowing in the circulation path 4, and this negative pressure causes the drain in the drain chamber 34a to flow through the drain discharge path 35. It is discharged to 4. This drain reaches the bathtub 2 together with the fluid in the circulation path 4.

3 and 4 are drain discharge characteristic diagrams of the drain discharge path (taper angle on the outlet side and outlet diameter) according to the present invention. In FIG. 3, a line Qe shows an example of the drain discharge characteristic with respect to the taper angle D on the outlet side of the venturi portion 43 of FIG. Ensure drain discharge capacity of 600 cc or more per minute (when inlet side taper angle B is 60 degrees, outlet diameter E is 10 mm, and circulation flow rate Qc is 12 liters per minute) in the range where the outlet side taper angle D is 10 degrees or less. The drain of less than 50 cc in the drain chamber is discharged in a few seconds.

The diagrams Qe and Qc in FIG. 4 show an example of the drain discharge characteristic (Q2) for the outlet diameter E of the venturi portion 43 and the circulation characteristic (Q1) at that time. Ensures a drain discharge capacity of 600 cc / min or more and a circulation capacity of 12 liters / min or more (when the inlet side taper angle B is 90 degrees and the outlet side taper angle D is 6 degrees) in the range where the outlet diameter E is 8 mm or more. can do.

As described above, according to the present invention, the drain discharge passage is connected to the venturi portion provided on the discharge side of the circulation pump of the circulation passage without depending on the suction force of the circulation pump, and the drainage passage is connected to the flow of the circulation passage. By draining drainage by means of drainage, it is not necessary to switch the flow path of the circulation pump for draining drainage, so flow path control including the valve mechanism and its control unit is simplified, and a compact device configuration and Accordingly, it is possible to contribute to reduction of product cost and improvement of device reliability.

Further, since it is not necessary to connect the drain discharge system to the suction side of the circulation pump, the degree of freedom in the structure of the bath device can be improved. It is also possible to support special specifications such as.

[0018]

As described above, since the drain discharge path of the atmosphere release valve of the hot water supply channel is opened in the venturi section provided in the forced circulation path for reheating, the venturi section is regenerated every time the reheating is performed. A negative pressure is generated in the valve, and the drain of the atmosphere release valve is discharged to the circulation path.

Therefore, according to the present invention, the drain accumulated in the drain chamber can be discharged without depending on the suction force of the circulation pump and without changing the flow path of the circulation pump for discharging the drain. Therefore, it is possible to simplify the flow path control including the valve mechanism and its control unit and achieve the compactness of the device, which in turn contributes to the reduction of the product cost and the improvement of the reliability of the device. it can.

Further, since it is not necessary to connect the system related to drain discharge to the suction side of the circulation pump, the degree of freedom in the structure of the bath device can be improved. It is also possible to support special specifications such as.

[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.

FIG. 3 is a drain discharge characteristic diagram regarding the shape of the drain discharge path (taper angle on the outlet side).

FIG. 4 is a drain discharge characteristic diagram regarding the shape (outlet diameter) of the drain discharge path.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bath device 2 ... Bathtub 3 ... Hot water supply passage 4 ... Forced circulation passage 34 ... Atmosphere release valve 34a ... Drain chamber 35 ... Drain discharge passage 41 ... Circulation pump 43 ... Venturi portion 43b ... Small diameter portion

 ─────────────────────────────────────────────────── ─── 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) Keiji Adachi 43-1, Uozakihama-cho, Higashinada-ku, Kobe City, Hyogo Prefecture Issue Nihon Yupro Co., Ltd.

Claims (1)

[Claims] 1. A bath apparatus provided with a hot water supply passage for filling water, an atmosphere release valve for air replacement of the hot water supply passage, and a forced reheating circulation passage on the discharge side of the circulation pump of the circulation passage. A venturi portion that forms a throttle portion whose cross-sectional area changes continuously is provided, and the drain discharge passage of the atmosphere release valve is opened in the small diameter portion of this venturi portion to discharge drain along with the flow in the circulation passage. Drain discharge path of bath equipment characterized by performing.