JPS6016861Y2 - gas appliances - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to gas appliances such as instantaneous water heaters.

The present invention will be specifically explained below based on an embodiment of a water heater as a gas appliance.

Reference numeral 1 denotes a water heater waterway with a heat exchanger 2 interposed therebetween, and a hot water tap 3 is provided at the end of the waterway 1 on the hot water supply side.

4 is a gas burner, and a gas path 5 leading to the gas burner 4
The main gas valve 6 and the gas valve 8 which are opened and closed by a hydraulic response device 7 provided on the water supply side of the water channel 1 are provided.

9 is a pilot burner, and 10 is a pilot gas valve.

Further, the gas path 5 leading to the gas burner 4 has two gas paths 11. 12! :The branch gas passage 11 is connected to one of the two divided burners 4', and the branch gas passage 12 is connected to the other burner 4'' via a solenoid valve 13, which will be described later.

14 is an igniter, and 15 is a frame rod.

Further, to explain the electric circuit shown in Fig. 2, the circuit consists of a burner circuit A', a control circuit B', and a flame detection circuit C', 16 is a power switch, 17 is a combustion switch, and 18 is a capacity selector switch. be.

Reference numeral 19 is a relay that is activated by energization to close the relay switch (IRLI) and energize the burner circuit A', and 20 is a relay that is activated when the flame detection circuit C' is in the flame detection state and closes the relay switch (IRLI). 2RL1) to igniter 1
4 to a series circuit of a normally open relay switch (3RL1) and a solenoid valve 13, which will be described later, and also closes a self-holding relay switch (2RL2) of a combustion switch.

Reference numeral 21 denotes a relay that is energized to close the relay switch (3RL1) when the capacity changeover switch 18 is closed.

22 is a power lamp, and 23 is a combustion lamp.

To explain the electromagnetic valve 13, the valve main body consists of a gas valve section 24 and an electromagnetic section 25.

The gas valve part 24 has a gas port 26 connected to the gas line 5 and gas outlets 27 and 28 connected to the branched gas line 11.12, and has a valve port 29 formed therein to connect the inlet 26 to the outlet 27.
The passage 11' leading to the inlet 26 and the outlet 2 via the valve port 29
8 and a passage 12'.

The electromagnetic section 25 includes an electromagnetic coil 30, a core 31 fixed at the center of the coil, and a frame 32 surrounding the coil 30.

34 is a gas valve part 24 and an electromagnetic part 25, and a gasket 35.3
6, the holder 34
In addition to forming a storage chamber 38 for a plunger 37, which will be described later, a support part 40 is formed in the center thereof, into which a shaft part 39a of a spindle 39, which will be described later, is slidably inserted.

Reference numeral 41 denotes a valve body facing the valve port 29 from the passage 11' side, and the valve body 41 is fixed to one end 39c of the spindle 39.

The other end 39b of the spindle 39 has a larger diameter than the shaft 39a, and the center of the plunger 37 has two continuous passages corresponding to the other end 39b and shaft 39a of the spindle 39, respectively. A spindle 39 is inserted into the opening, and a first spring 43 is inserted into the gap 42 between the shaft portion 39a and the plunger 37.

44 is a ring fixed to the spindle 39, and this ring 44 is for preventing the spindle 39 from protruding beyond the attracting surface of the plunger 37.

A second spring 45 has a smaller spring force than the first spring 43, which is interposed between the support portion 40 of the holder 34 and the valve body 41.

46 has a smaller spring force than the first spring 43;
The spring 46 is a third spring having a larger spring force than the spring 45, and the spring 46 is
Washer 4 fixed to 9 by a ring 47
It is interposed between 8 and 8.

Reference numeral 49 denotes a groove formed in the end surface of the support portion 40, into which the ring 47 can enter, and at this time the washer 48 is locked to the end surface.

Also, although the drawing shows the valve open state, 1, in this state, the gap A between the attracted surface of the plunger 37 and the attracted surface of the core 31 is larger than the gap B between the valve port 29 and the valve body 41, and the washer 48 The gap C between the support portion 40 and the end face of the support portion 40 is smaller than the gap B.

In the above configuration, the power switch 16 is closed and the combustion switch 17 is pressed to close.

Then, the relay 19 is activated and the relay switch (lRLl
) is closed, the burner circuit A' is energized, and the source gas valve 6 is closed.
, the pilot valve 10 is energized and the pilot burner 9 is opened.
At the same time, the igniter 14 ignites the burner 9.

Then, connect the ignition flame of pilot burner 9 to flame rod 1.
5 is detected, the relay 20 is activated and the relay changeover switch (2RL1) is switched to stop the operation of the igniter 14, and even if the relay switch (2RL2) is closed and the combustion switch 17 is released, the relay 20 is activated. 19 etc. is maintained.

When the hot water tap 3 is opened, a water flow is generated in the water channel 1, and the gas valve 8
opens and sends gas to the gas burner 4, which heats the heat exchanger 2 and supplies hot water.

Then, by opening and closing the capacity selector switch 18 as appropriate, the solenoid valve 1
3 is opened and closed to open and close the gas path 12, and the burner capacity can be changed.

That is, when the electromagnetic coil 30 is energized, the generated magnetic force generates an attractive force in the core 31 and the plunger 37 is attracted.

At the beginning of suction, the second spring 4 is lower than the first spring 43.
Since the spring force of 5 is small, only the second spring 45 is compressed while the plunger 37 is sucked through the distance corresponding to the gap 0, and the plunger 37 is further compressed by the distance equal to the distance C subtracted from the next gap B. When this is sucked, the second spring 45 and the washer 48 come into contact with the end surface of the support portion 40, the third spring 46 is also compressed, and the valve body 41 closes the valve port 29.

At this time, there is a slight gap between the core 31 and the plunger 37, and during further suction, only the plunger 37 will be sucked into the core 31 while compressing the first spring 43.

Furthermore, if the electromagnetic coil 30 is turned off, the attraction force of the core 31 disappears, so the plunger 37 is instantly pulled away from the core 31 by the elastic force of the first spring 43, and the valve body 4
1 is separated from the valve port 29 by the elastic force of the third spring 45 and the third spring 46.

As explained above in the embodiments, according to the present invention, first, the core 31 is fixed at the center of the electromagnetic coil 30, so the attraction force to the plunger 37 is large, so a small electromagnetic coil can be used, and the power consumption is Therefore, the solenoid valve and gas appliances become compact.

Also, the gap A between the plunger 37 and the core 31 is
and the gap B between the circumferential gap A and the valve body 41, and the spindle 39 is attached to the plunger 37 with a first spring 43 interposed so as to be slidable within a certain range, and the difference between the circumferential gaps A and B is Since the spring 43 absorbs the energy, the valve can be opened and closed accurately, and the solenoid valve can be easily designed.

Furthermore, taking into account the characteristic of a solenoid valve that the suction force decreases in inverse proportion to the square of the distance from the plunger, the spring is compressed in stages as the suction stroke progresses.
A large Fl can be maintained between the valve body 41 and the valve port 29, so the pressure loss when the gas passes through the valve port 29 is reduced, and when the gas is opened, it is instantly forced by the elastic force of the first plunger 43. Since the plunger 37 is separated from the core 31,
This also prevents the valve from opening due to the residual magnetism of the core 31.

Further, a support portion 40 in which the spindle 39 is formed on the holder 34
Because it is inserted through the valve body 41, even if it is necessary to install it horizontally due to the design of the device, the weight of the valve body 41 etc. will cause the valve body 4
1 is eccentric from the center of the valve port 29, which adversely affects the operation.As mentioned above, according to the present invention, the power consumption due to the use of the device is small, and the solenoid valve The purpose of this invention is to provide a gas appliance that is useful in that the design of the appliance is easy due to the ease of design, and the capacity switching operation is reliable.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, FIG. 2 is an electric circuit diagram, and FIG. 3 is an enlarged sectional view of the main parts. 2... Heat exchanger, 4... Gas burner,
5... Gas path, 11... Branch gas path,
12... Branch gas path, 13... Solenoid valve, 29... Valve port, 37... Plunger, 39... Spindle, 41... Valve body, 43... First spring, 45...
...Second spring, 46...Third spring.

Claims (1)

[Scope of utility model registration request] In a device in which a gas path leading to a gas burner that heats a heat exchanger is branched and a solenoid valve is interposed in one of the branched gas paths, the solenoid valve has a coil and a core fixed at the center of the coil, and a A plunger placed in a storage chamber, a valve body facing the valve port from the upstream side, and a hole provided in the plunger by penetrating the valve port and fixing one end to the valve body and expanding the diameter of the other end. The spindle is inserted into the mouth, the holder has a supporting part through which the shaft of the spindle is slidably inserted, and the other end of the spindle is fixed to the shaft of the other end of the spindle so that the other end of the spindle is lower than the attracted surface of the plunger. a ring that restricts protrusion; a first spring that biases the plunger in the ring direction; and a first spring that biases the plunger in the ring direction; a ring fixed to a shaft portion that restricts movement of the washer toward the other end of the spindle, and a groove formed on the end surface of the support portion into which the ring for locking the washer can enter;
It has a second spring and a third spring that bias the valve element in the valve opening direction, which are interposed between the support part and the valve element and between the washer and the valve element, respectively, and the spring force of the first spring described above is provided. is larger than the spring force of the second spring and the third spring, and the spring force of the second spring is smaller than the spring force of the third spring, and when the valve body is opened, the core and the attracted surface of the plunger The gap A is larger than the gap B between the valve body and the valve port, and the gap C between the washer and the end surface of the support part is larger than the gap B.
A gas appliance characterized by being smaller.