JPH0232187Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electric water heater, and particularly to an electric water heater equipped with a heat pump type boiler.

[Conventional technology]

As an electrical equipment equipped with a heat pump boiler,
Drip type coffee makers have been known for a long time.

A drip coffee maker basically consists of a water tank supported on a board, a boiler part, and a hot water supply part.The hot water supply part faces the board, and there is a space on the board to place a jug equipped with a coffee brewing part. is configured to ensure that For example, see Japanese Patent Publication No. 55-11047 and Utility Model Publication No. 58-51870.

[Problem that the invention attempts to solve]

Conventional coffee makers have a space for placing a jug, and this space exists both when they are in use and when they are not in use, so they have the disadvantage of taking up extra storage space when not in use.

Further, when installed in a car or a small recreational boat, etc., if left unused, the living space becomes narrow, it becomes an obstacle to driving, and there are problems such as dust adhesion.

The above problem is caused by the fact that the water heater body is
A temporary solution can be achieved by attaching the main unit so that it can be rotated within a range of 100° and folding the main unit when not in use. It may spill out from the hot water supply opening and stain the surrounding area.

On the other hand, since a coffee maker is equipped with a water boiling function, by utilizing this function, it can be used not only to brew coffee but also to prepare hot water-type instant foods such as cutlet ramen.

Therefore, the object of this invention is to provide an electric water heater that can be folded compactly by eliminating the above-mentioned space when not in use, and has a structure that prevents dew condensation on the inner wall of the hot water supply passage.

[Means for solving problems]

In order to solve the above problems, this idea
The water heater body, which includes a water tank, a heat pump boiler, and a hot water supply section, is rotatably supported on a support provided on a board, and the lower limit of the rotation range is folded parallel to the support when not in use. Along with setting,
The upper limit of the water supply section is set in the operating state where it protrudes at right angles from the support, and the hot water supply port of the hot water supply section is formed on the bottom surface of the water heater body in the operating state, and the upper limit of the water tank is set in the middle of the passage from the boiler to the hot water supply port. A passage section is formed that is higher than the water level, and a steam vent hole is provided in the top plate of that section.

[Effect]

In the electric water heater having the above structure, when not in use, the water heater body is folded and stored parallel to the support, and when in use, it is set in a state where it projects at right angles from the support.
In addition, steam in the hot water supply passage is removed from the steam vent hole.

〔Example〕

FIG. 1 shows the device when not in use, and FIGS. 2 and 3 show the device in use. This electric water heater consists of a water heater main body 1, a support 2 of the main body 1, and a base plate 4 on which the support 2 and the auxiliary support 3 are provided.

Hereinafter, the structure of the water heater main body 1 will be explained based on the usage conditions shown in FIGS. 2 and 3.

The water heater main body 1 consists of a water tank 5, a heat pump type boiler 6, and a hot water supply section 7.
has an opening 9 on the top surface covered by a sliding cover 8.

One side 10 of the opening 9 is formed at the edge of a projecting portion 12 from a wall surface 11 that becomes the bottom surface when not in use (see FIG. 1).

A heat pump type boiler 6 is provided below the water tank 5, and the bottom surface of the water tank 5 and the inlet 13 of the heating pipe 13 (see FIG. 4) are the opening of the water tank 5 with a built-in check valve 14. It is communicated with the cylinder by a connecting tube 15.

As shown in FIG. 4, the heat pump boiler 6 has a horseshoe-shaped sheathed heater 17 on the top surface of the heat plate 16.
The heating tube 13 is attached along the inner periphery of the sheathed heater 17. Furthermore, a thermostat 18 is attached to the center of the hot plate 16, and as described later, the sheathed heater 1 is activated by detecting the dry cooking state.
It is designed to turn off the power to 7.

The outlet 19 of the heating pipe 13 is connected to the lower end of the water pumping pipe 20 of the hot water supply section 7 . The hot water supply section 7 is formed on the side of the boiler 6 and the water tank 5, and the upper end of the water pumping pipe 20 is connected to the enlarged hot water supply chamber 22 above the hot water pipe 21 at a position somewhat higher than the highest water level of the water tank 5. It is connected to the. A hot water supply port 23 at the lower end of the hot water supply pipe 21 is open at the center of the lower surface of the water heater main body 1.

The hot water supply chamber 22 prevents the formation of a siphon between the water tank 5 and the hot water supply port 23 by introducing atmospheric pressure into this portion. In addition, the hot water supply chamber 22
A plurality of steam vent holes 25 are formed in the top plate 24 of.

The external shape of the water heater main body 1 described above is the second
As shown in the figure, a stepped portion 26 is formed at the height of the bottom surface of the water tank 5, and a portion below the stepped portion 26 forms a bottom portion 27 that is one step smaller in size.

The water heater main body 1 is rotatably attached to the support column 2 via a support shaft 28 on both sides of the bottom portion 27 at a position offset to the rear end thereof. Pillar 2 is
The substrate 4 is integrally molded in a U-shape surrounding the rear end and both sides near the rear end, and the main body 1 is attached to the inner surface of the protruding portions of both sides.

A locking device 29 is provided between the above pillar 2 and the main body 1.
is provided so that the main body 1 can be held in a protruding state at right angles to the support column 2.

This locking device 29 is designed such that when a locking button 31 is pressed, a locking pin 30 moves back and the lock is released, and when the button 31 is released, it is locked.

Further, at the front end of the base plate 4, an auxiliary column 3 is pivotally supported so as to be able to rise and fall freely. A recess 34 is formed at the upper end of this auxiliary column 3.

As shown in FIGS. 1 and 2, the top plate 24 of the hot water supply unit 7 in which the steam vent hole 25 described above is formed slightly protrudes from the water heater main body 1, but the width of the top plate 24 is larger than the top plate. The width and height of the bottom portion 27 of the main body 1 are also formed to dimensions that can fit into the recess 34 (see Fig. 1). (See Figure 2).

In addition, at the rear end of the stepped portion 26 of the water heater main body 1,
The operating shaft 36 of the safety switch 35 is biased in the protruding direction, and when the operating shaft 36 contacts the upper end surface of the support column 2 and retracts in the operating state shown in FIG. 2, the safety switch 35 is turned on. do.

Furthermore, a container support stand 37 is provided on the upper surface of the substrate 4. This container support stand 37 includes a spacer 40 removably fitted between a cylindrical portion 38 protruding from the center of the substrate 4 and a peripheral wall 39 of the substrate 4, and a dish-shaped bottom plate 41 placed on the spacer 40. , and a support plate 43 that is fitted with a bottom plate 41 with a coil spring 42 interposed therebetween, and on the upper surface of the support plate 43 there are two types of stepped portions 4 that fit the bottom surface of the container.
4,45 are formed.

FIG. 5 shows the hot water temperature control circuit 46. This control circuit 46 connects a DC power source 47 to a power switch 4.
8 via the safety switch 35,
The a contact 50 of the control relay 49, the momentary switch 51, and the light emitting element 52 for energization indication are connected in parallel, and the series circuit of the winding 53 of the control relay 49 and the thermostat 18 is connected to the sheathed heater 17.
is connected in parallel with the light emitting element 54 for displaying hot water, and both of the above parallel circuits are connected in series with the power source 47.

In addition, 55 in the figure is a surge absorption diode of the control winding 53.

The structure of the embodiment of this invention is as described above, and its operation will be explained next.

When not in use, as shown in Figure 1,
A water heater main body 1 is folded parallel to a support 2, and an auxiliary support 3 is erected. A recess 34 of the auxiliary support 3 fits into the side surface of the top plate 24. in this case,
Since the operating shaft 36 of the safety switch 35 separates from the upper end surface of the support column 2, the safety switch 35 is turned off.

When using the water heater, first tilt down the auxiliary support 3 as shown by the dashed line in Fig. 2, and then rotate the water heater body 1 until it becomes horizontal.
Since the locking pin 30 of the locking device 29 is engaged with the column 2, the main body 1 is locked in a horizontal state projecting from the column 2, and the safety switch 35 is turned on.

Next, slide the cover 8 of the water tank 5 to open it (see the one-dot chain line in Figure 2), add water for one batch, and place it in a cup with a built-in coffee extractor or a cup containing instant food such as instant ramen. The container A is placed on the container support stand 37, and its upper end opening is pressed against the lower surface of the water heater main body 1 by the biasing force of the spring 42. Also,
In this state, the auxiliary support 3 is erected as shown in Figure 2 to support the main body 1 from its underside, so that it will not be affected even if it receives an impact from above, and the container A will be protected against vibrations, etc. This prevents it from coming off the support base 37.

After completing the preparations as described above, when the power switch 48 is turned on and the momentary switch 51 is momentarily pressed, the control relay 49 is activated and the relay 49 is self-held by its contacts 50. The actuation of the contact 50 energizes the sheathed heater 17 .

The water in the water tank 5 passes through the check valve 14 to the heating pipe 13 of the heat pump boiler 6 and the water pumping pipe 20.
has reached the specified level, but the sheathed heater 1
When the heating pipe 13 is heated through the heating plate 16 due to the heat generated by 7 and steam pressure is generated, the hot water in the heating pipe 13 and the water pumping pipe 20 is discharged into the hot water supply pipe 21.
Hot water is supplied into the container A from the hot water supply port 23. In this case, steam escapes through the steam vent hole 25. heating tube 1
When the hot water in the water tank 5 is pushed out, the internal pressure decreases, so the check valve 14 is opened and the water in the water tank 5 is transferred to the heating pipe 13.

Note that the hot water pushed out from the heating pipe 13 is prevented from flowing back into the water tank 5 by the check valve 14.

In this way, when all the water in the water tank 5 has flowed out, the heating tube 13 will eventually become empty and the temperature will rise rapidly, so when it reaches a certain value, the thermostat 18 will be activated. control relay 49
The excitation of the winding 53 is cut off. As a result, the contact 50 of the relay 49 is turned off, and the power to the heater 17 is cut off.

〔effect〕

As mentioned above, this idea is such that the main body of the water heater is folded parallel to the support. Therefore, the space formed below the water heater main body when in use is eliminated when not in use, which has the effect of making the water heater more compact.

In addition, a steam vent hole was formed in the middle of the hot water supply passage (in the example, the water pumping pipe 20, the hot water supply chamber 22, and the hot water supply pipe 21) in a passage portion higher than the highest water level of the water tank (in the example, the hot water supply chamber 22). As a result, steam generated inside the passage can be released to the outside during the passage of hot water, during boiling when the flow of hot water has stopped, or immediately after all the hot water has flowed out. As a result, condensation is less likely to form inside the passage, and the inconvenience of water spilling out of the hot water supply opening when the water heater body is folded is eliminated.

Furthermore, when folded, the steam vent hole is located on the side, which prevents dust from entering.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the embodiment in an unused state;
Fig. 2 is a perspective view of the above in use, Fig. 3 is a sectional view of Fig. 2, Fig. 4 is a sectional view taken along the - line in Fig. 3, and Fig. 5 is a circuit diagram of the control portion of the embodiment. be. DESCRIPTION OF SYMBOLS 1... Water heater main body, 2... Support column, 3... Auxiliary support column, 4... Board, 5... Water tank, 6... Heat pump boiler, 7... Water supply section, 9... Opening,
10...Side edge, 11...Wall surface, 12...Protruding portion, 13...Heating pipe, 14...Check valve, 16...
Hot plate, 17... Sheathed heater, 18... Thermostat, 20... Lifting pipe, 21... Hot water pipe, 22
... Hot water supply room, 23 ... Hot water supply port, 25 ... Steam vent hole, 28 ... Support shaft, 29 ... Lock device, 34 ...
...Recess, 35...Safety switch, 37...Container support stand.

Claims (1)

[Scope of utility model registration request] A water heater body having a water tank, a heat pump type boiler, and a hot water supply section is supported by a support provided on a board, and water supplied from the water tank is heated in the boiler and hot water is supplied from the hot water supply section. In the electric water heater, the main body of the water heater is rotatably supported on the pillar, and the lower limit of the rotation range is set to the unused state of being folded parallel to the pillar, and the upper limit is set to a state in which it is not in use and is folded parallel to the pillar. The hot water supply port of the hot water supply section is formed on the lower surface of the main body of the water heater in the use state, and there is a passageway higher than the highest water level of the water tank in the middle of the passage from the boiler to the hot water supply opening. An electric water heater characterized by forming a section and having a steam vent hole in the top plate of the section.