JP4277822B2 - Electric water heater - Google Patents

Description

  The present invention includes a lead-out means such as an electric pump for leading the liquid in the container, and a check valve for preventing hot water from flowing out of the hot water inlet when the main body tilts or falls. It relates to an electric water heater.

  Conventionally, as this kind of electric water heater, what is shown in FIGS. 11-13 is known (for example, refer patent document 1).

As shown in the figure, the main body 1 is provided with a container 2 having a heater for heating, and the bottom of the container 2 has lead-out means 3 for guiding hot water in the container 2 to the outside of the main body 1 ( Electric pump) is installed. The derivation means 3 is connected to a water pipe 4, and the water pipe 4 is connected to a case body 6 having a hot water supply port 5. The case body 6 includes a connection case 8 containing the sliding valve 7, a concave lower case 9 having a covering portion 9 a covering the upper opening of the connection case 8, and an upper opening of the concave portion 9 c of the lower case 9. The upper case 12 is formed so as to cover and form the in-case outlet path 11 together with the lower case 9. The covering portion 9a of the lower case 9 is provided with a through hole 9d through which liquid from the connection case 8 side passes. Further, in the lower case 9 in the vicinity of the hot water supply port 5, a valve storage portion 9b that contains the spherical valve 10 is provided, and the depth of the recess 9c is adjusted to the valve storage portion 9b.
JP 2004-344277 A

  However, in the conventional configuration, since the upper case 12 only covers the recess 9c having the depth matched to the valve storage portion 9b, the in-case lead-out path 11 formed by the lower case 9 and the upper case 12 has a large space. It was. As a result, when the derivation means 3 is operated, the space of the in-case derivation path 11 is first filled with hot water, and then hot water begins to be discharged from the hot water supply port 5, so It was late.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an electric water heater capable of efficiently deriving the liquid derived from the container by the deriving means without being delayed with respect to the deriving operation.

  In order to solve the above-described conventional problems, an electric water heater according to the present invention includes a first check valve case and a second check valve case that communicates with the first check valve case and covers an upper opening thereof. The second check valve case includes a concave lower case, and an upper case that covers the concave upper opening of the lower case and forms an in-case lead-out path together with the lower case. Is a convex shape with a part thereof facing toward the lower case, and the internal volume of the lead-in path in the case is smaller than the internal volume due to the concave shape of the lower case.

  Thus, after the derivation operation, the in-case derivation path is immediately filled with hot water, so that hot water can be efficiently derived without delay with respect to the derivation operation.

  The electric water heater of the present invention can efficiently extract hot water without delaying the operation of derivation.

  According to a first aspect of the present invention, there is provided a container for storing a liquid, a deriving unit for deriving the liquid in the container, a deriving path for guiding the liquid derived from the container to the hot water supply side of the main body, the hot water supply port and the deriving path A first check valve case connected between the first check valve case and a second check valve case that communicates with the first check valve case and covers an upper opening thereof, and the second check valve case includes: A lower case having a concave shape and an upper case that covers the concave upper opening of the lower case and forms an in-case lead-out path together with the lower case, with the upper case facing a part of the lower case By using an electric water heater in which the internal volume of the lead-out path in the case is reduced as compared with the internal volume due to the concave shape of the lower case as a convex shape, the lead-out path in the case is filled with hot water immediately after the lead-out operation. Efficiently derive hot water without delay to operation It is possible.

  In particular, according to the second invention, in the first invention, a through hole through which the liquid from the first check valve case passes is provided in the lower case of the second check valve case, and the second check valve case is opposed to the through hole. The height of the convex shape of the upper case is differentiated between the upper part of the through hole and its outer peripheral part, and the outer peripheral part is brought close to the lower case, so that the distance between the through hole and the convex shaped part can be taken out. Hot water can flow without reducing the flow rate of the hot water.

  In the third invention, in particular, in the first or second invention, the sealing surfaces of the lower case and the upper case are formed on a single plane, so that the sealing of the lower case and the upper case is facilitated and the sealing is ensured. Can be.

  According to a fourth aspect of the present invention, in particular, in any one of the first to third aspects of the present invention, a partition is provided in the lower case to form a valve housing that contains the spherical valve. The position is inclined so that the position is opposite to the hot water inlet, and an opening without a partition wall is provided between the hot water inlet and the spherical valve. It is isolated from the hot water flow in the lead-out path in the case, and it is possible to prevent the spherical valve from being given a force that moves to the hot water inlet side due to the hot water flow.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, in the fourth aspect of the present invention, a communication portion communicating with the in-case lead-out path is provided in the valve storage portion on the side opposite to the hot water supply port. When the hot water flow is fast, the hot water around the spherical valve is pulled by the flow, but since the hot water is also led out from the communicating part, the spherical valve is sucked to the hot water supply side. Can be prevented.

  In the sixth aspect of the invention, in particular, in the fifth aspect of the invention, the communication portion is provided below the valve storage portion, so that the spherical valve can be prevented from being given a force to rotate toward the hot water supply port. .

  In the seventh invention, in particular, in the fifth or sixth invention, the opening is made larger than the communicating portion, and the amount of liquid led out from the opening to the hot water inlet is larger than the amount derived from the communicating portion. As a result, the amount of hot water led out from the opening to the hot water outlet side is larger than the amount led out from the communicating portion, and the derived hot water is prevented from flowing in a large amount from the communicating portion and pushing out the spherical valve. Can do.

In an eighth aspect of the invention, in particular, in any one of the fourth to seventh aspects of the invention, a spherical valve is provided in the valve storage portion.
When the main body is inclined, the spherical valve closes the valve seal hole provided in the valve housing portion, and the opening area of the valve seal hole is determined from the cross-sectional area perpendicular to the liquid flow in the lead-out path in the case. By increasing the size, it is possible to prevent the spherical valve from being soaked in hot water so that buoyancy works and it is easy to roll.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
1 to 3 show an electric water heater according to Embodiment 1 of the present invention.

  As shown in the figure, a main body 21 is provided with a container 22 that contains a liquid and has a heater, and a discharge means 23 (electric pump) that guides hot water in the container 22 to the outside of the main body 21 at the bottom of the container 22. ) Is attached. The derivation means 23 is connected to a derivation path 24 that guides the liquid derived from the container 22 to the hot water supply port 25 side of the main body 21, and the derivation path 24 is a first check valve connected between the hot water supply port 25 and the derivation path 24. It communicates with the case 28 and the first check valve case 28 and is connected to a second check valve case 26 that covers the upper opening thereof. The second check valve case 26 is provided with a hot water supply port 25.

  The first check valve case 28 includes a sliding valve 27. The second check valve case 26 includes a concave lower case 29 having a covering portion 29 a that covers the upper opening of the first check valve case 28, and a concave upper opening of the lower case 29. And an upper case 32 that forms the in-case lead-out path 31 together with the lower case 29, and the upper case 32 has a part protruding toward the lower case 29 and the contents of the in-case lead-out path 31 The product is configured to be smaller than the internal volume due to the concave shape of the lower case 29.

  Further, the outer periphery of the lower case 29 and the upper case 32 is sealed, and the sealing surface 32b is provided above the concave portion 32a of the upper case 32 so as not to be exposed to hot water. The sealing surface 32b is provided on a single plane for easy sealing. Further, the concave portion 29c of the lower case 29 is inclined so that the first check valve case 28 side is lowered so that the hot water stops immediately when the operation of the derivation means 23 is stopped. Further, the cover 29a of the lower case 29 is provided with a through hole 29d through which the liquid from the first check valve case 28 side passes. Further, a valve housing portion 29b containing the spherical valve 30 is formed in the lower case 29 in the vicinity of the hot water supply port 25, and a valve seal hole 29f is provided between the valve housing portion 29b and the tip portion 29e. Between the through hole 29d of the upper case 32 and the valve storage portion 29b, a convex shape is formed toward the lower case 29 side. As described above, the convex portion 32a is fitted into the concave portion 29c of the lower case 29 to lead out the in-case lead-out path. The internal volume of 31 has been reduced. Note that if the cross-sectional area in the direction perpendicular to the hot water flow in the in-case outlet passage 31 is made substantially the same as the cross-sectional area of the through hole 29c, the amount of hot water that does not become resistance to the hot water flow and accumulates in the in-case outlet passage 31. Can be reduced. The upper opening of the container 22 is covered with a lid 36.

  About the electric water heater formed as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the derivation means 23 is driven by operation, the hot water in the container 22 is led out and injected into the first check valve case 28 and the second check valve case 26 through the derivation path 24. That is, the first check valve case 28, the in-case lead-out path 31, and the valve storage portion 29b are filled with hot water in order, and hot water is supplied from the hot water supply port 25 when the tip portion 29e is filled with hot water. At this time, since the cross-sectional area of the lead-in path 31 in the case between the valve hole 29d and the valve storage portion 29b is reduced, the amount of hot water accumulated in the lead-out path 31 in the case is small, and the lead-in path 31 in the case immediately after the lead-out operation The hot water comes out from the hot water supply port 25 without being delayed with respect to the derivation operation. When the derivation operation is stopped, the amount of hot water filled is small, so that the hot water quickly and efficiently returns to the container 22 side.

  When the main body 21 is tilted or falls, the sliding valve 27 closes the through hole 29d and the spherical valve 30 closes the valve seal hole 29f, thereby preventing the hot water from flowing out of the hot water supply port 25 unexpectedly. It is something that can be done.

  In addition, the internal volume of the lead-out path 31 in the case can be set to a desired amount by fitting the convex portion 32a into the concave portion 29c regardless of the external shape of the lower case 29 and the upper case 32. Can be set to Furthermore, since the sealing surface 32b is provided above the recess 29c so that the sealing surface 32b is not easily exposed to hot water, deterioration of the sealing surface 32b can be suppressed. In the above description, the derivation means 23 is an electric pump. However, the derivation means 23 may be any one that can derive hot water in the container 22, and may be a lid provided with a bellows type air pump.

(Embodiment 2)
FIG. 4 shows an electric water heater according to the second embodiment of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The electric water heater in the present embodiment is provided in the lower case 29 of the second check valve case 26, and the convex of the upper case 32 facing the through hole 29d through which the liquid from the first check valve case 28 passes. The height of the shape (the height of the convex portion 32 a) is made different between the upper portion of the through hole 29 d and the outer peripheral portion thereof, and the outer peripheral portion is brought close to the lower case 29. That is, the in-case lead-out path 31 is formed only by the upper part of the through hole 29d.

  Thus, in the present embodiment, by considering the height of the convex shape of the upper case 32, the distance between the through hole 29d and the convex portion 32a can be taken, and the flow rate of the derived hot water is reduced. You can run hot water.

(Embodiment 3)
FIG. 5 shows an electric water heater according to Embodiment 3 of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the electric water heater in the present embodiment, the sealing surface 32b between the lower case 29 and the upper case 32 is formed on one plane.

  Thus, in this embodiment, since the sealing surface 32b is on a single plane, the sealing of the lower case 29 and the upper case 32 can be easily and reliably performed regardless of the sealing method.

(Embodiment 4)
FIG. 6 shows an electric water heater according to Embodiment 4 of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The electric water heater in the present embodiment is provided with a partition wall 33 in the lower case 29 to form a valve storage portion 29b containing the spherical valve 30. The valve storage portion 29b has a fixed position of the spherical valve 30 with the hot water inlet 25. The bottom surface is inclined so as to be on the opposite side, and the opening 34 without the partition wall 33 is provided between the hot water supply port 25 and the spherical valve 30, and the derived liquid is led out from the opening 34 to the hot water supply port 25 side. Is.

As described above, in the present embodiment, the partition wall 33 and the opening 34 are provided, and the bottom surface of the valve storage portion 29b is inclined, so that the spherical valve 30 is isolated from the hot water flow in the in-case outlet passage 31 and is fixed. It is possible to prevent the spherical valve 30 from being given a force to move toward the hot water supply port 25 due to the flow of hot water. Thereby, comfortable use of an electric water heater becomes possible.

(Embodiment 5)
FIG. 7 shows an electric water heater according to Embodiment 5 of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the electric water heater according to the present embodiment, a communication portion 35 communicating with the in-case outlet 31 is provided in the valve storage portion 29b opposite to the hot water supply port 25, and the derived liquid is supplied from the communication portion 35 and the opening 34 to the hot water supply port. It leads to 25 side.

  As described above, in the present embodiment, when the hot water flow is fast by providing the communication portion 35, the hot water around the spherical valve 30 is pulled by the flow, but the hot water is also led out from the communication portion 35. Therefore, it is possible to prevent the spherical valve 30 from being sucked to the hot water supply port 25 side. Thereby, comfortable use of an electric water heater becomes possible.

(Embodiment 6)
FIG. 8 shows an electric water heater according to Embodiment 6 of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The electric water heater in the present embodiment is provided with a communication portion 35 communicating with the in-case lead-out path 31 positioned below the valve storage portion 29b.

  As described above, in the present embodiment, the position of the communication portion 35 is set below the valve storage portion 29b, so that no force is applied to the spherical valve 30 to rotate toward the hot water supply port 25 (reverse direction force). Can be applied). Thereby, comfortable use of an electric water heater becomes possible.

(Embodiment 7)
FIG. 9 shows an electric water heater according to the seventh embodiment of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the electric water heater in the present embodiment, the opening 34 is made larger than the communication portion 35, and the amount of liquid derived from the opening 34 toward the hot water supply port 25 is larger than the amount derived from the communication portion 35. .

  Thus, in the present embodiment, since the opening 34 is made larger than the communication portion 35, the amount of hot water led out from the opening 34 toward the hot water supply port 25 becomes larger than the amount derived from the communication portion 35. Therefore, it is possible to prevent the derived hot water from flowing in a large amount from the communication portion 35 and pushing out the spherical valve 30. Thereby, comfortable use of an electric water heater becomes possible.

(Embodiment 8)
FIG. 10 shows an electric water heater according to the eighth embodiment of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the electric water heater in the present embodiment, the opening area of the valve seal hole 29f provided in the valve housing portion 29b is larger than the cross-sectional area in the direction perpendicular to the liquid flow in the in-case outlet passage 31.

As described above, in the present embodiment, the opening area of the valve seal hole 29f is larger than the cross-sectional area of the in-case lead-out path 31, so that it is larger from the valve seal hole 29f than the lead-out amount from the in-case lead-out path 31. So that the hot water can flow. Therefore, it is difficult to fill the valve storage portion 29b with hot water, and it is possible to prevent the spherical valve 30 from being soaked in hot water so that buoyancy works and it is easy to roll. Thereby, comfortable use of an electric water heater becomes possible.

  As described above, the electric water heater according to the present invention can efficiently extract hot water without being delayed with respect to the derivation operation, and thus can be applied to uses such as a water supply device.

Sectional drawing of the electric water heater in Embodiment 1 of this invention Enlarged sectional view of the check valve case part of the electric water heater Side sectional view of the lead-in path in the case of the electric water heater Side sectional view of the in-case lead-out path of the electric water heater in Embodiment 2 of the present invention The expanded sectional view of the check valve case part of the electric water heater in Embodiment 3 of this invention The expanded sectional view of the check valve case part of the electric water heater in Embodiment 4 of this invention The expanded sectional view of the check valve case part of the electric water heater in Embodiment 5 of this invention The expanded sectional view of the check valve case part of the electric water heater in Embodiment 6 of this invention (A) Partial enlarged sectional view of the check valve case portion of the electric water heater in Embodiment 7 of the present invention (b) Same side sectional view (A) Partial side sectional view of a check valve case portion of an electric water heater in Embodiment 8 of the present invention (b) Same side sectional side view Sectional view of a conventional electric water heater Enlarged sectional view of the check valve case part of the electric water heater Side sectional view of the lead-in path in the case of the electric water heater

21 Main body 22 Container 23 Deriving means 25 Hot water supply port 26 Second check valve case 28 First check valve case 29 Lower case 29a Covering portion 29b Valve housing portion 29c Recessed portion 29d Through hole 29e Tip portion 29f Valve seal hole 30 Spherical shape Valve 31 Derived passage in case 32 Upper case 32a Convex part 32b Seal surface 33 Partition wall 34 Opening part 35 Communication part

Claims (8)

A container for storing the liquid, a deriving means for deriving the liquid in the container, a deriving path for guiding the liquid led out from the container to the hot water supply side of the main body, and a first line connected between the hot water supply port and the deriving path. A first check valve case and a second check valve case that communicates with the first check valve case and covers an upper opening thereof, and the second check valve case has a concave lower case And an upper case that covers the concave upper opening of the lower case and forms an in-case lead-out path together with the lower case, and the upper case has a part thereof convex toward the lower case, An electric water heater in which the inner volume of the lead-out path is smaller than the inner volume of the concave shape of the lower case The lower case of the second check valve case is provided with a through hole through which the liquid from the first check valve case passes, and the upper upper portion of the convex shape of the upper case opposite the through hole and the upper The electric water heater according to claim 1, wherein the electric water heater is different from the outer peripheral portion, and the outer peripheral portion is brought close to the lower case. The electric water heater according to claim 1 or 2, wherein a sealing surface between the lower case and the upper case is formed on a single plane. A partition wall is provided in the lower case to form a valve housing portion containing the spherical valve. The valve housing portion is inclined so that the fixed position of the spherical valve is opposite to the hot water inlet, The electric water heater according to any one of claims 1 to 3, wherein an opening having no partition wall is provided, and the derived liquid is led out from the opening to the hot water supply port side. The electric water heater according to claim 4, wherein a communication portion communicating with the lead-in path in the case is provided in the valve storage portion on the side opposite to the hot water supply port, and the derived liquid is led out from the communication portion and the opening to the hot water supply port side. The electric water heater according to claim 5, wherein the communication part is provided below the valve storage part. The electric water heater according to claim 5 or 6, wherein the opening is made larger than the communicating portion, and the amount of liquid derived from the opening to the hot water supply side is larger than the amount derived from the communicating portion. A spherical valve is arranged in the valve storage part, and when the main body is inclined, the spherical valve is provided in the valve storage part.
The electric water heater according to any one of claims 4 to 7 , wherein a valve hole is closed, and an opening area of the valve seal hole is larger than a cross-sectional area in a direction perpendicular to the liquid flow in the lead-in passage in the case.

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