JP3105517B2 - Bath equipment with anti-freezing operation function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention detects a temperature by a temperature detecting device, and when it detects that the temperature has reached a set temperature at which antifreeze operation is to be performed, for example, 2 ° C. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath apparatus for automatically driving a pump in a circulation pipe passing through a heat exchanger for heating to prevent freezing.

[Conventional technology]

There are various types of bath apparatuses having an anti-freezing operation function. As an example, FIG. 3 shows a direct reheating type with a water heater and FIG. 4 shows a fully automatic type with a water heater. .

In FIG. 3, reference numeral 1 denotes a reheating heat exchanger,
The pump 4, a bathtub hot water temperature detection sensor, and a running water switch 6 are disposed in the circulation pipe 2 via the circulating bracket of the bathtub 3. Reference numeral 7 denotes a heat exchanger for hot water supply, and a flow sensor 8 and a feed water temperature detection sensor 9 are disposed in a water supply pipe thereof, and a tap water temperature detection sensor 11 is disposed in a tap water pipe 10.

Then, when the reheating switch is turned on after setting a desired boiling water temperature on a remote controller (not shown), the microcomputer control unit 12 drives the pump 4 and burners (shown in the drawing) of the reheating heat exchanger 1. Is omitted), the hot water (water) in the bathtub is circulated and heated, and when the hot water temperature detection sensor 5 detects that the hot water temperature in the bathtub has reached the set hot water temperature, the signal is received and the additional heating is performed. It is configured to stop the operation. The signals from the hot water supply side flow sensor 8, water supply temperature detection sensor 9, and hot water temperature detection sensor 11 are also input to the microcomputer control unit, and are configured to operate according to the conditions set in the remote controller.

The bath apparatus having the anti-freezing operation function, in addition to the above-described configuration, arranges a temperature detecting device 13 in the appliance, and confirms that the temperature detecting device has reached a preset temperature of, for example, 2 ° C. or 3 ° C. When it is detected, the pump 4 is driven to make hot water (water) in the bathtub flow through the circulation pipe, thereby preventing freezing.

The fully automatic type with water heater shown in FIG.
The branch 10 is connected to the reheating circulation line 2 via a line 15 having an electromagnetic valve or a hopper unit 14, and the water level detection sensor in the bathtub is connected to the reheating circulation line 2 or the line 15. 16
When the automatic switch is turned on after setting the hot water temperature and the water level on the remote controller, the hot water heated by the hot water supply heat exchanger 7 is filled in the bathtub through the circulation pipe line 2, and the hot water is set to the set water level. When the temperature reaches the temperature, the pouring is stopped and the pump 4 is driven to detect the temperature of the bath water. When the temperature does not reach the set temperature, the burner (not shown) of the reheating heat exchanger 1 is turned off. It is configured to boil to the set hot water temperature by burning. Other configurations are the same as those of the direct reheating type shown in FIG. 3, and therefore, the same parts as those in FIG.

[Problems to be solved by the invention]

As shown in FIG. 2, the bath apparatus having the above-described anti-freezing operation function detects the ambient temperature by the temperature detecting device 13, drives the pump 4 when the detected temperature reaches the set temperature, and increases the temperature higher than the set temperature. Since the pump is stopped only when the temperature reaches the temperature, the pump is automatically driven by the temperature after the installation of the equipment and the electrical wiring work are completed, even though the equipment has never been operated In such a case, the pump may run idle and be damaged.

That is, in this type of bath apparatus, the operation check is performed by a contractor after the installation of the appliance, but since the power is turned off after the check, even if the combustion information is cleared and the detected temperature becomes low, the anti-freezing operation is performed. However, if the user turns on the power of the bath apparatus after that, the freezing prevention operation may be performed due to a decrease in the temperature before the operation operation (generally, the combustion operation) in which water is poured into the pump,
In that case, the pump may run idle and be damaged.

An object of the present invention is to improve the above-mentioned problems of the prior art and to provide a bath apparatus in which the pump is not liable to run idle when the appliance has never been used.

[Means for solving the problem]

In order to achieve the above object, the present invention, when the temperature detecting device detects that the temperature to perform the antifreezing operation has been reached, the microcomputer controls whether or not there is a record of the reheating operation or the automatic operation in the past. The unit is characterized in that the anti-freezing operation is performed by driving the pump only when there is an operation record in the past, and the pump is not driven when there is no operation record in the past.

[Action]

As described above, the present invention, when the temperature detection device detects that the temperature to perform the anti-freezing operation has been reached, determines whether or not there is an operation record in the past, and prevents the anti-freezing only when there is an operation record in the past. Since the operation is performed, the antifreeze operation is not performed when the equipment has not been operated even once after installation, and the antifreeze operation is performed only when there is an operation record (the inside of the pump is filled with water). It is possible to reliably prevent the pump from being damaged by idling.

〔Example〕

 Next, the method of the present invention will be described with reference to FIG.

In the present invention, as shown in FIG. 1, when the temperature detection device 13 detects that the temperature for performing the anti-freezing operation has been reached, first, the microcomputer control unit determines whether or not the operation has been performed in the past. Since the microcomputer control unit originally has a function to check the burner combustion, it is very easy to judge whether or not there is a past operation record. After that, if the temperature rises, the pump is stopped to prepare for the next freezing prevention operation.

〔The invention's effect〕

As described above, according to the present invention, the anti-freezing operation is performed only when the pump has been operated in the past and there is no danger of the pump being idle, so that the pump is reliably prevented from being damaged by the idle operation. can do.

[Brief description of the drawings]

FIG. 1 is a flowchart of an antifreeze operation to which the present invention is applied, FIG. 2 is a flowchart of a conventional antifreeze operation, and FIGS. 3 and 4 are schematic diagrams showing a configuration of a bath apparatus to which the present invention is applied. is there. DESCRIPTION OF SYMBOLS 1 ... Heat exchanger for additional heating, 2 ... Circulation additional heating pipeline, 3 ... Bathtub, 4 ... Pump, 5 ... Hot water temperature detection sensor, 6 ... Flow water switch, 7 ... Heat exchange for hot water supply , Flow sensor, 9 Water supply temperature sensor, 11 Hot water temperature sensor, 12
Microcomputer control unit, 13 ... Temperature detection device.

Continuation of the front page (56) References JP-A 62-147848 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24H 1/00 602

Claims (1)

(57) [Claims] A temperature detecting device detects a temperature, and when it detects that the temperature has reached a set temperature at which an antifreezing operation is to be performed, a pump in a circulation line passing through a reheating heat exchanger is automatically activated. When the temperature detection device detects that the temperature has reached the temperature at which antifreezing operation should be performed in a bath device that has been driven to prevent freezing, the microcomputer determines whether there is a record of reheating operation or automatic operation in the past. The anti-freezing operation, characterized in that the control unit makes a judgment and the pump is driven only when there is an operation record in the past to perform the anti-freezing operation, and the pump is not driven when there is no operation record in the past. Bath equipment with functions.