JP2008267671A - Hot water storing tank unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storing tank unit, having excellent replacement work efficiency for a temperature sensor for detecting the hot water storing state in a hot water storing tank. <P>SOLUTION: This hot water storing tank unit includes a closed hot water storing tank 10 for storing hot water generated by utilizing waste heat of a gas engine power generation unit and a backup hot water supply device 20, wherein the hot water storing tank 10 is installed in a casing 30 having a front plate 31, both side plates 32, 32, a back plate 33 and a top plate 34, and the backup hot water supply device 20 is fitted to an inspection surface of the casing 30. A sheath pipe 60 inserted from the top face part 11 of the hot water storing tank 10 into the tank is removably fixed to the top face part 11 of the hot water storing tank 10 through a sheath pipe side joint 63 fitted to the sheath pipe 60, a tank side joint 64 fitted to the top face part 11 of the hot water storing tank 10 and a quick fastener 65 having a U-shaped longitudinal section. A temperature sensor unit 50 having a thermistor 51 to which a lead wire 53 is connected is inserted into the sheath pipe 60. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot water storage tank unit employed in a cogeneration system, a solar water heater, and the like.

  An example of this type of hot water storage tank unit is shown in FIG. This hot water storage tank unit 1A is a hot water storage tank unit for a cogeneration system, as shown in FIGS. 4A and 4B, and uses hot water generated by utilizing waste heat of a gas engine power generation unit (not shown). A sealed hot water storage tank 10 </ b> A and a backup water heater 20 are provided. The hot water storage tank 10 </ b> A is installed in a casing 30 having a removable front plate 31, both side plates 32 and 32, a back plate 33, and a top plate 34, and a backup water heater 20 is attached to the inspection surface of the casing 30. It has been.

  Connected to the bottom of the hot water storage tank 10A are a low temperature water supply pipe 41 for supplying low temperature water into the tank and a low temperature water delivery pipe 42 for sending the low temperature water in the tank to the gas engine power generation unit. A hot water supply pipe 43 for supplying hot water generated using waste heat of the gas engine power generation unit into the tank and hot water stored in the tank are supplied to the backup water heater 20 on the top surface of the hot water storage tank 10A. A hot water delivery pipe 44 for delivery is connected.

  A hot water delivery pipe 44, a low temperature water supply pipe 45, and a hot water discharge pipe 46 are connected to the backup water heater 20, and when hot water having a temperature equal to or higher than the hot water supply temperature is stored in the hot water storage tank 10A, the backup water heater 20 is provided. The hot water having a hot water supply set temperature is generated by appropriately mixing the low temperature water supplied through the low temperature water supply pipe 45 with hot water having a temperature equal to or higher than the hot water supply set temperature supplied through the hot water delivery pipe 44. When hot water is discharged via the hot water storage 46 and hot water equal to or higher than the hot water supply set temperature is not stored in the hot water storage tank 10A, the backup hot water heater 20 heats hot water or low temperature water sent from the hot water storage tank 10A below the hot water supply set temperature. Thus, hot water having a hot water supply set temperature is generated, and the hot water is discharged through the hot water pipe 46.

  Further, as shown in FIGS. 5A and 5B and FIGS. 6A and 6B, the hot water storage tank 10A is in contact with the outer surface of the hot water storage tank 10A so as to face the inspection surface of the casing 30. As shown, a plurality of thermistors 51 are installed in the height direction. Based on the surface temperature of the hot water storage tank 10A detected by each thermistor 51, the microcomputer of the controller (not shown) calculates the hot water storage state, and the hot water storage The status is displayed on a remote controller or the like installed in the kitchen. 6A and 6B, reference numeral FC denotes a hook for attaching the thermistor 51, and reference numeral GW denotes a heat insulating material that entirely covers the hot water storage tank 10A.

JP 11-337177 A

  By the way, in the hot water storage tank unit 1A as described above, the backup water heater 20 is attached to the inspection surface of the casing 30, and the thermistor that cannot be directly viewed from the inspection surface side of the casing 30 depending on the installation position of internal piping, control parts, and the like. 51, and when such thermistor 51 fails, there is a problem that the replacement work cannot be easily performed.

  Further, in the case of this hot water storage tank unit 1A, not the front position facing the inspection surface of the casing 30 but the side position or back facing the one side or back of the casing 30 so that the backup water heater 20 does not become an obstacle. Although it is conceivable to attach the thermistor 51 to the position, depending on the situation of the installation location of the hot water storage tank unit 1A, the inside of the casing 30 can be inspected by removing the side plate 32 and the back plate 33 of the casing 30. Since it is not limited, it is not an effective solution.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a hot water storage tank unit excellent in workability for replacing a temperature sensor for detecting a hot water storage state in the hot water storage tank.

  In order to solve the above problems, the invention according to claim 1 is directed to a hot water storage tank in which hot water is stored, and the hot water storage from the top surface portion of the hot water storage tank so that the closed end side faces the bottom surface side of the hot water storage tank. A sheath tube inserted into the tank and having an open end fixed to the top surface portion of the hot water storage tank; and a temperature sensor unit having a lead wire connected to the temperature sensor, the temperature sensor unit being on the temperature sensor side The hot water storage tank unit is provided which is inserted into the sheath tube.

  Further, the invention according to claim 2 is the hot water storage tank unit of the invention according to claim 1, wherein a sheath pipe side joint is attached to the open end portion of the sheath pipe, and the top surface portion of the hot water storage tank is A tank side joint is attached to the insertion hole portion of the sheath pipe, and the sheath pipe is detachably attached to the top surface portion of the hot water storage tank by connecting the sheath pipe side joint and the tank side joint to each other. It is characterized by being fixed.

  The invention according to claim 3 is characterized in that, in the hot water storage tank unit of the invention according to claim 1 or 2, the hot water storage tank is a sealed tank.

  According to a fourth aspect of the present invention, in the hot water storage tank unit according to the first, second, or third aspect of the present invention, the open end of the sheath tube is sealed with the temperature sensor unit inserted. It is characterized by.

  The invention according to claim 5 is the hot water storage tank unit of the invention according to claim 1, 2, 3 or 4, further comprising a casing that covers the hot water storage tank, and the casing is removed on the inspection surface. A backup water heater is attached to the inspection surface of the casing, and even if the front plate is removed, from the inspection surface of the casing, Due to the presence of the backup water heater, at least a part of the hot water storage tank cannot be directly viewed.

  As described above, in the hot water storage tank unit of the invention according to claim 1, the sheath tube inserted into the hot water storage tank from the top surface side toward the bottom surface side is fixed to the top surface portion of the hot water storage tank, Since a temperature sensor unit with a lead wire connected to the temperature sensor is inserted in the sheath tube, if there is a small space above the hot water storage tank, the temperature sensor unit can be pulled out to the upper side. Sensor replacement work can be performed easily.

  Therefore, even if backup water heaters, piping, control parts, etc. are installed around the hot water storage tank, they do not interfere with the temperature sensor replacement work, and even when the hot water storage tank unit is installed under the eaves, Since a certain amount of space can be ensured between the top surface of the hot water storage tank and the eaves ceiling, the temperature sensor can be exchanged reliably without being affected by the location of the hot water storage tank unit.

  Moreover, the hot water storage tank unit of the invention according to claim 2 includes a sheath pipe side joint attached to the open end portion of the sheath pipe and a tank side joint attached to the insertion hole portion of the sheath pipe in the top surface portion of the hot water storage tank. By connecting to each other, the sheath tube is detachably fixed to the top surface of the hot water storage tank. If a hole is opened in the sheath tube due to corrosion or the like, only the sheath tube can be easily installed. Can be exchanged.

  Further, as in the hot water storage tank unit of the invention according to claim 3, even when the hot water storage tank is a sealed tank, when the temperature sensor is replaced, the hot water in the hot water storage tank does not blow out, and the temperature sensor can be replaced. Workability is good.

  Further, in the hot water storage tank unit of the invention according to claim 4, since the open end portion of the sheath tube is sealed with the temperature sensor unit inserted, the temperature sensor is hardly affected by the outside air, and the temperature detection is performed with high accuracy. It can be carried out.

  In particular, as in the hot water storage tank unit of the invention according to claim 5, even if the front plate of the casing disposed on the inspection surface is removed due to the presence of a backup water heater attached to the inspection surface of the casing, This is particularly effective when at least a portion cannot be directly viewed.

  Hereinafter, embodiments will be described with reference to the drawings. A hot water storage tank unit 1 shown in FIGS. 1 (a) and 1 (b) is a hot water storage tank unit for a cogeneration system that generates waste water using waste heat of a gas engine power generation unit. Therefore, the same components are denoted by the same reference numerals, description thereof is omitted, and different components will be described in detail.

  As shown in FIGS. 1 (a), 1 (b) and 2, the hot water storage tank unit 1 has a top surface portion in a state where a sheath tube 60 is inserted into the tank from the top surface portion 11 of the sealed hot water storage tank 10. A plurality of thermistors 51 are installed in the height direction so as to be in contact with the outer surface of the hot water storage tank 10A in that the temperature sensor unit 50 is inserted into the sheath tube 60. The structure differs from the conventional hot water tank unit 1A.

  As shown in FIGS. 3 and 4A and 4B, the temperature sensor unit 50 includes five thermistors 51 and lead wires 52 connected to the thermistors 51, respectively. Each thermistor except for the lowest-order thermistor 51 and the length of the lead wire 52 is adjusted for each thermistor 51 so that each thermistor 51 comes to a predetermined height position when inserted into the 60. In the vicinity of 51, a plurality of lead wires 52 are bound together.

  The lead wire 51 having the thermistor 51 connected to one end side is connected to the connector 53 at the other end side, and can be connected to a cable drawn from a controller (not shown) via the connector 53. It has become.

  As shown in FIGS. 2, 3, 4 (a) and 4 (b), the sheath tube 60 includes a metal pipe 61 having an inner diameter of 16 mm and a metal cap that closes the lower end of the pipe 61. The upper end of the cap 62 is welded and fixed to the peripheral surface of the pipe 61 with the cap 62 fitted into the lower end of the pipe 61.

  The sheath pipe 60 is welded and fixed in a state in which a cylindrical sheath pipe side joint 63 is externally fitted to the open upper end portion of the pipe 61, and the sheath pipe side joint 63 is attached to the upper end portion thereof. It has a flange portion 63a projecting radially outward, and an O-ring 63b is mounted in a circumferential groove formed on the outer peripheral surface of the trunk portion.

  The hot water storage tank 10 is welded and fixed in a state in which a cylindrical tank side joint 64 into which the sheath pipe side joint 63 can be inserted is inserted into the insertion hole of the sheath pipe 60 in the top surface portion 11. In the side joint 64, a stepped portion 64a is formed at the upper end portion by a circumferential groove formed on the outer peripheral surface.

  The sheath pipe side joint 63 to which the sheath pipe 60 is attached is inserted into the tank side joint 64 attached to the top surface portion 11 of the hot water storage tank 10 from the sheath pipe 60 side, and the flange portion 63a of the sheath pipe side joint 63 is tanked. The flange 63a of the sheath pipe side joint 63 and the stepped part 64a of the tank side joint 64 are sandwiched by using a quick fastener 65 having a “U” -shaped vertical cross section while being in contact with the upper end surface of the side joint 64. Thereby, the sheath side joint 63 to which the sheath pipe 60 is attached is detachably fixed to the tank side joint 64.

  In addition, a cylindrical rubber cap 66 is fitted to the sheath pipe side joint 63 in a state where the temperature sensor unit 50 is inserted into the sheath pipe 60, and the rubber cap 66 is elastically deformed. Thus, the inner peripheral surface is in close contact with the temperature sensor unit 50, and the open end of the sheath tube 60 is sealed.

  The rubber cap 66 has a flange portion 66a that comes into contact with the upper end portion of the sheath tube side joint 63, and is divided in the circumferential direction. By pressing and spreading the divided portion, the temperature is increased from the outside in the radial direction. The sensor unit 50 can be fitted.

  As described above, in the hot water storage tank unit 1, the sheath tube 60 inserted into the hot water storage tank 10 from the top surface portion 11 side downward is fixed to the top surface portion 11 of the hot water storage tank 10, and the sheath tube The temperature sensor unit 50 in which the lead wire 52 is connected to the thermistor 51 is inserted into the temperature sensor 60. Therefore, if there is a slight space above the hot water storage tank 10, the top plate 34 of the casing 30 is removed to remove the temperature. The sensor unit 50 can be pulled out upward, and the thermistor 51 can be easily replaced.

  Therefore, even if a backup water heater 20, piping, control parts, etc. are installed around the hot water storage tank 10 as in the hot water storage tank unit 1, they do not hinder the replacement work of the thermistor 51, and the hot water storage tank unit. Even when 1 is installed under the eaves, since a certain amount of space can usually be secured between the top surface of the hot water storage tank 10 and the eaves top, it is not affected by the installation location of the hot water storage tank unit 1. The thermistor 51 can be exchanged reliably.

  The hot water storage tank 10 mounted on the hot water storage tank unit 1 is a hermetically sealed tank, but the temperature sensor unit 50 is inserted into the sheath tube 60 attached to the hot water storage tank 10, so When performing the replacement work, hot water in the hot water storage tank 10 does not spout.

  Further, the temperature sensor unit 50 is connected to a cable drawn from the controller via the connector 53. When the thermistor 51 is replaced, the temperature sensor unit 50 is detached by removing the connector 53. Workability is good.

  The hot water storage tank unit 1 includes a sheath pipe side joint 63 attached to the open end of the sheath pipe 60 and a tank side joint 64 attached to the insertion hole portion of the sheath pipe 60 in the top surface portion 11 of the hot water storage tank 10. Are connected to each other using a quick fastener 65, so that the sheath tube 60 is detachably fixed to the top surface portion 11 of the hot water storage tank 10, so that a hole is opened in the sheath tube 60 due to corrosion or the like. In such a case, it is possible to easily replace only the sheath tube 60 without draining hot water stored in the hot water storage tank 10.

  In addition, since the open end of the sheath tube 60 is sealed by the rubber cap 66 fitted to the sheath tube side joint 63 in a state where the temperature sensor unit 50 is inserted into the sheath tube 60, The thermistor 51 is not easily affected by outside air, and temperature detection can be performed with high accuracy.

  In the above-described embodiment, the temperature sensor unit 50 is simply inserted into the sheath tube 60, but the thermistor 51 of the temperature sensor unit 50 is brought into contact with the inner peripheral surface of the sheath tube 60 by a spring or the like. By doing so, the detection accuracy of the hot water temperature in the hot water storage tank 10 can be further increased.

  In the above-described embodiment, the open end portion of the sheath tube 60 is sealed by the rubber cap 66 fitted to the sheath tube side joint 63, but the open end portion of the sheath tube 60 is not sealed. However, since a certain degree of temperature detection accuracy can be ensured, the rubber cap 66 is not necessarily provided.

  In the above-described embodiment, the hot water storage tank unit 1A on which the sealed hot water storage tank 10 is mounted has been described. However, the present invention is not limited to this, and the hot water storage tank may be open.

  Moreover, although the hot water storage tank unit 1 in which the backup hot water heater 20 was mounted was demonstrated in embodiment mentioned above, it is not limited to this, The present invention is a hot water storage tank unit in which the backup hot water heater 20 is not mounted. Needless to say, this can also be applied.

In the above-described embodiment, the hot water storage tank unit for the cogeneration system that generates the hot water using the waste heat of the gas engine power generation unit has been described. However, the present invention is not limited to this, and the present invention It can be applied to various hot water storage tank units that generate and store hot water using exhaust heat or natural energy, such as hot water heater, gas, kerosene fuel cell exhaust heat recovery device, CO ² heat pump water heater, etc. it can.

(A) is a schematic plan view which shows one Embodiment of the hot water storage tank unit which concerns on this invention, (b) is a schematic side view which shows a hot water storage tank unit same as the above. It is a fragmentary sectional view which shows the hot water storage tank mounted in the hot water storage tank unit same as the above. It is a partial expanded sectional view which shows the attachment part of the sheath pipe with respect to a hot water storage tank same as the above. (A), (b) is a fragmentary sectional view which shows the insertion state of the temperature sensor unit with respect to a sheath pipe. (A) is a schematic plan view which shows an example of the conventional hot water storage tank unit, (b) is a schematic side view which shows a hot water storage tank unit same as the above. (A), (b) is a fragmentary sectional view which shows the attachment state of the thermistor to the hot water storage tank mounted in the hot water storage tank unit same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water storage tank unit 10 Hot water storage tank 11 Top part 20 Backup water heater 30 Casing 31 Front plate 32 Side plate 33 Back plate 34 Top plate 41 Low temperature water supply pipe 42 Low temperature water delivery pipe 43 Hot water supply pipe 44 Hot water delivery pipe 45 Low temperature water supply pipe 46 Hot water pipe 50 Temperature sensor unit 51 Thermistor 52 Lead wire 53 Connector 60 Sheath pipe 61 Pipe 62 Cap 63 Sheath pipe side joint 63a Flange part 63b O-ring 64 Tank side joint 64a Step part 65 Quick fastener 66 Rubber cap 66a Flange part GW Thermal insulation Material

Claims (5)

A hot water storage tank in which hot water is stored;
A sheath tube inserted into the hot water storage tank from the top surface of the hot water storage tank so that the closed end side faces the bottom surface side of the hot water storage tank, and an open end fixed to the top surface of the hot water storage tank;
A temperature sensor unit with a lead wire connected to the temperature sensor,
The hot water storage tank unit, wherein the temperature sensor unit is inserted into the sheath tube from the temperature sensor side. A sheath tube side joint is attached to the open end of the sheath tube,
A tank side joint is attached to the insertion hole portion of the sheath pipe on the top surface of the hot water storage tank,
The hot water storage tank unit according to claim 1, wherein the sheath pipe is detachably fixed to a top surface portion of the hot water storage tank by connecting the sheath pipe side joint and the tank side joint to each other. .   The hot water storage tank unit according to claim 1 or 2, wherein the hot water storage tank is a sealed tank.   4. The hot water storage tank unit according to claim 1, wherein the sheath tube has an open end sealed in a state where the temperature sensor unit is inserted. 5. A casing covering the hot water storage tank;
The casing has a removable front plate disposed on the inspection surface, and a removable top plate,
A backup water heater is attached to the inspection surface of the casing,
Further, even if the front plate is removed, at least a part of the hot water storage tank cannot be directly viewed from the inspection surface of the casing due to the presence of the backup water heater. The hot water storage tank unit described.

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