JPS6226682Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hot water temperature regulating device when an instantaneous gas water heater is used as an auxiliary heat source for a solar water heater or the like.

When using an instantaneous gas water heater as an auxiliary heat source for a solar water heater, etc., if the temperature of the water supplied from the water heater is high, the water heater will further heat the water, so there is a risk of boiling water being dispensed. Many of these are not commonly used in combination with instantaneous gas water heaters as an auxiliary heat source.

This invention eliminates such risks and allows safe use no matter how high the temperature of the water supply is.One embodiment of this invention will be described below with reference to the drawings.

In the drawing, reference numeral 1 indicates a heat-sensing section inserted into a hot water outlet pipe or heat exchanger of a water heater, and 2 indicates a bellows that communicates with the heat-sensing section 1 through a pipe. The bellows housing 2' is raised by the action of the thermal expansion liquid inside. On the other hand, when the temperature of the hot water drops, the casing 2'
descends. In other words, the casing 2' is configured to be displaced up and down in the drawing in proportion to the temperature of the tapped water. Reference numeral 3 denotes an arm having one end associated with the bellows housing 2', the other end associated with a slider 4 of a gas input control device E, which will be described later, and a spindle 5 of a gas passage opening/closing device F described later attached closer to the bellows. Then, the displacement of the bellows housing 2' within a predetermined range is amplified using the part 24 connected to the spindle 5 as a fulcrum, and the slider 4 of the gas input control device E is actuated, and the displacement over a predetermined range is generated. After the slider 4 reaches its permissible lowering limit as shown, the spindle 5 of the gas passage opening/closing device F is operated using the portion 3b connected to the arm 3 as a fulcrum. The gas input control device E controls the governor spring 8 by moving the slider 4 back and forth.
The amount of gas supplied to the main gas burner is adjusted by adjusting the repulsive force of the main gas burner and moving the governor valve 7 installed in the gas passage 6 to increase or decrease the number of gas holes 26. Reference numeral 9 denotes a spring receiver which also serves as a fully open gas amount adjustment screw, and 10 represents a half open gas amount adjustment screw, which is used to determine the lower limit position of the slider 4 in the drawing. 11 is a diaphragm, 12 is a long hole, and the other end 3 of the arm 3
b is adapted to move up and down in the drawing along this elongated hole 12. Further, the gas passage opening/closing device F has one end connected to the bellows side of the arm 3 through a related portion 24, and a diaphragm 19 at the other end of the spindle 5.
A shaft 25 protruding into the gas passage 6 is opposed to the shaft 25 via a valve spring 14, and a gas valve 15 that faces a valve seat 16 provided in the gas passage 6 is attached via a valve spring 14. is a presser plate 1 which is inserted into and held by a disc-shaped leaf spring 17 for a snap so that it can freely slide, and which is fixed to the shaft 25.
The end edge of 3 is provided opposite to the disc-shaped leaf spring 17. 18 is a related part 2 between the spindle 5 and the arm 3
The spring that supports the slider 4 is a spring that supports the slider 4 using the related portion 24 as a fulcrum until the slider 4 reaches the lower limit position, and thereafter is compressed using the fulcrum 3b. Further, the bellows 2 is automatically returned to its original position by a return spring 20, is installed on a bellows base 21, and has a temperature control lever 23 associated with a bellows receiver 22.

In the above configuration, normal input control is as follows:
Thermal sensing part 1 senses the temperature of hot water in the hot water tap, etc., and causes the bellows 2 to undergo a displacement proportional to the hot water temperature, and this displacement of the bellows 2 is amplified and transmitted to the slider 4 of the input control device E via the arm 3. The governor valve 7 is operated to adjust the amount of gas supplied to the main burner. That is, when the tapping temperature is higher than the set temperature, the bellows 2 expands and the other end 3b of the arm 3 is connected to the spindle 5 at the related part 2.
4 as a fulcrum and pushes down the slider 4, the set load of the governor spring 8 is reduced, and the gas passage hole 26 is throttled by the governor valve 7, thereby reducing the input. Also, when the hot water temperature becomes lower than the set temperature, the bellows 2 contracts and the other end 3 of the arm 3
In order to raise b and push up the slider 4, the set load of the governor spring 8 becomes large, and the gas passage hole 26 is opened wide by the governor valve 7 to increase the input. In this way, under normal conditions, the gas input is automatically controlled in size to maintain a constant tapping temperature. In this way, the input control device E is balanced at a certain constant tapping temperature, and the tapping temperature is stabilized.

Next, if the temperature of the hot water becomes abnormally high due to some reason, such as the use of a solar water heater in the summer, the bellows 2 expands further and the slider 4 is moved at the other end 3b of the arm 3 to further lift one end 3a of the arm 3. The arm 3 is moved to the lower limit position corresponding to the half-open gas amount adjustment screw 10, and one end 3a of the arm 3 is lifted using the other end 3b as a fulcrum. Therefore,
This displacement is transmitted to the spindle 5 via the related part 24, reverses the snap plate spring 17 via the shaft 25 and the holding plate 13, and pushes the gas valve 15 up by the valve spring 14 to bring it into close contact with the valve seat 16, thereby causing the gas passage. Close 6. When the tap water temperature decreases, the bellows 2 contracts, and the pushing force exerted by the arm 3 is released. Therefore, the leaf spring 17 automatically returns, lowering the gas valve 15 against the valve spring 14 and lowering the valve seat 16.
to open the gas passage 6. Note that the hot water temperature is set in advance by the temperature control lever 23, and in normal input control, the lower limit position of the slider 4 is set by the half-open gas amount adjustment screw 10 so that the lower limit does not become less than 50% of the input. It is something that is regulated.

As explained above, this idea automatically controls the gas input to compensate for fluctuations within a certain range when the preset hot water temperature fluctuates, making it possible to stabilize the hot water temperature and to keep the water supply temperature at room temperature. When the temperature reaches a high temperature, the gas supply is cut off to prevent abnormal boiling, which is particularly effective when a water heater is used as an auxiliary heat source for a solar water heater or the like. Additionally, since the hot water temperature is adjusted by adjusting the amount of gas consumed, no more gas is used than necessary, contributing to energy savings.

[Brief explanation of drawings]

The drawing is a sectional view showing an embodiment of this invention. 1... Heat sensitive part, 2... Bellows, 3... Arm, 3b... Other end of arm, 5... Spindle,
E... Gas input control device, F... Gas passage opening/closing device, 24... Parts related to the spindle.

Claims (1)

[Scope of utility model registration request] A heat sensitive part 1 installed in a hot water outlet pipe or the like in a water heater senses the hot water temperature and expands and contracts the bellows 2, causing a displacement in the bellows proportional to the hot water temperature, and this displacement causes the arm 3 to open the gas passage opening/closing device F. The gas input control device E is oscillated about the part 24 connected to the spindle 5 as a fulcrum, and the gas input control device E is mounted at the other end 3b of the arm 3.
When the bellows 2 is operated beyond a predetermined input control level, the spindle 5 of the gas passage opening/closing device F is moved to the arm 3.
A hot water temperature regulating device for a water heater, characterized in that the other end 3b is used as a fulcrum to perform a pushing up operation.