JP2009121719A - Water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water heater capable of mounting and demounting a temperature sensor to a hot water storage tank, and simplifying harness processing. <P>SOLUTION: In this hot water storage type water heater 1, the plurality of temperature sensors 44a-44e are mounted on a side face of the hot water storage tank 31, and the side face is covered by a heat insulating material 51. The heat insulating material 51 includes one opening 52, and the opening 52 is opposite to mounting positions of the plurality of temperature sensors 44a-44e. As a worker can mount the plurality of temperature sensors 44a-44e as a whole from one opening, work efficiency in mounting the temperature sensors can be improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot water supply machine, and more particularly to a hot water storage type hot water supply apparatus that stores hot water in a hot water storage tank.

  Conventionally, in a hot water storage type water heater, the side surface of the hot water storage tank is covered with a heat insulating material, and in the area where the temperature sensor on the side surface is installed, in order to facilitate the temperature sensor replacement work during the maintenance, the heat insulating material An opening provided in advance faces the temperature sensor installation location. (For example, refer to Patent Document 1).

In Patent Document 1, the hot water storage tank is covered with four heat insulating materials. Specifically, a side heat insulating material that covers the side surface of the hot water storage tank, an upper heat insulating material that covers the ceiling portion of the hot water storage tank, and a bottom portion of the hot water storage tank. These are the bottom heat insulating material to be covered and the heat insulating material for sensors that cover a plurality of temperature sensors arranged substantially evenly in the height direction of the hot water tank side surface. The sensor heat insulating material is provided with an opening so as to face each temperature sensor, and each opening is also closed with a heat insulating lid. At the time of maintenance, the heat insulating lid of the opening can be removed and the temperature sensor can be replaced.
JP 2007-183052 A

  However, in Patent Document 1, as many openings and heat insulating lids as the number of temperature sensors are required, and it is necessary to take out the temperature sensor harness from one opening and put it in the next opening, and the harness is long. Therefore, the work is complicated.

  The subject of this invention is providing the water heater which can simplify attachment or removal of the temperature sensor to a hot water storage tank, and harness processing.

  A water heater according to a first aspect of the present invention is a water heater for storing hot water heated by a heating means in a tank, and includes a plurality of temperature sensors attached to the tank and a heat insulating material attached to the tank. This heat insulating material has a smaller number of openings than the number of temperature sensors, and the openings are affixed to the tank at positions facing the mounting positions of the plurality of temperature sensors.

  In this water heater, since an operator can attach two or more temperature sensors collectively from a minimum of one opening, the number of openings is the same as the number of temperature sensors, and one temperature sensor from one opening. Compared with the conventional product with the mounting, the working efficiency when the temperature sensor is mounted is improved.

  A water heater according to a second aspect of the present invention is the water heater according to the first aspect of the present invention, and a plurality of marks suggesting attachment positions of the plurality of temperature sensors are formed in a peripheral portion of the opening.

  In this water heater, the operator can determine the mounting position of the temperature sensor while using the mark as a guide, so that the working efficiency is improved. In addition, since it is not necessary to mark the tank side, it is easy to use.

  A water heater according to a third aspect of the present invention is the water heater according to the first aspect of the present invention or the second aspect of the present invention, and further includes a number of lids smaller than the number of temperature sensors for closing the opening.

  In this water heater, since the work of closing the openings with the lid is reduced as compared with the conventional product that requires the same number of openings and lids as the number of temperature sensors, the working efficiency is improved.

  A water heater according to a fourth aspect of the present invention is the water heater according to any one of the first to third aspects, wherein the number of openings is one.

  Conventionally, in this water heater, the temperature sensor harness straddles the surface between adjacent openings, but by using one opening, the temperature sensor harness is housed inside the opening and moved to the outside of the heat insulating material. Not exposed. As a result, the harness is not damaged during installation of piping or the like, safety is improved, and attachment work of other members can be easily performed.

  A water heater according to a fifth aspect of the present invention is the water heater according to any one of the first to fourth aspects of the present invention, wherein the opening is a long hole along the longitudinal direction of the tank.

  In this water heater, the operator can attach or remove the temperature sensor from the upper part to the lower part of the opening or from the lower part to the upper part, so there is no need to move the working position to the left and right. Work becomes easier.

  A water heater according to a sixth aspect of the present invention is the water heater according to any one of the second to fifth aspects, wherein the number of lids is greater than the number of openings.

  In this water heater, for example, when there is a water heater pipe in front of the opening, the lid is divided at a position where there is a possibility of interference with the pipe. It can be done and is easy to use.

  A water heater according to a seventh aspect of the present invention is the water heater according to the first to sixth aspects of the present invention, wherein a plurality of temperature sensors are arranged in a state where each of the plurality of temperature sensors is disposed substantially on a line at a predetermined interval. Are bundled.

  In this water heater, for example, the temperature sensor located at the top is attached first, so that the other temperature sensors are arranged in a line on the vertical line, so that positioning to the tank is easy and easy to use.

  In the water heater according to the first aspect of the present invention, the operator can attach two or more temperature sensors at a time from a minimum of one opening, so that the working efficiency when attaching the temperature sensor is improved.

  In the water heater according to the second aspect of the invention, the operator can determine the mounting position of the temperature sensor while using the mark as a guide, so that the working efficiency is improved. In addition, since it is not necessary to mark the tank side, it is easy to use.

  In the water heater according to the third invention, the work of closing the opening with the lid is reduced, so that the work efficiency is improved.

  In the water heater according to the fourth aspect of the invention, by making the opening one, the harness of the temperature sensor is housed inside the opening and is not exposed to the outside of the heat insulating material, so that the harness may be damaged during installation of piping or the like. Therefore, the safety is improved and the attachment work of other members is facilitated.

  In the water heater according to the fifth aspect of the invention, the operator can attach or remove the temperature sensor from the upper part of the opening toward the lower part or from the lower part to the upper part, so that the work position is moved to the left and right. There is no need, and the work becomes easier.

  In the water heater according to the sixth aspect of the invention, the lid can be attached or detached while avoiding interference with the piping, which improves usability.

  In the water heater according to the seventh aspect of the present invention, positioning to the tank becomes easy and user-friendliness is good.

  Embodiments of the present invention will be described below with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

<Configuration of hot water storage type water heater>
FIG. 1 is an external perspective view of a hot water storage type hot water heater according to the present embodiment, and FIG. 2 is a configuration diagram of the hot water storage type hot water heater. In FIG. 1, a hot water storage type hot water heater 1 is constituted by a heat pump unit (heating means) 2 and a hot water storage device 3, and a vapor compression refrigeration circuit is accommodated in the casing of the heat pump unit 2. A hot water storage tank 31 is accommodated in the casing.

  In FIG. 2, the heat pump unit 2 includes a muffler 21 a, a compressor 21, a refrigerant pipe 22 a in the water heat exchanger 22, an expansion valve 23 as a decompression unit, and an air heat exchanger 24 connected in a ring shape by a refrigerant pipe 25. The vapor compression refrigeration circuit 20 is provided.

  The refrigeration circuit 20 is provided with a liquid gas heat exchanger 26 for heat exchange between the high-pressure and high-temperature refrigerant coming out of the water heat exchanger 22 and the low-pressure and low-temperature refrigerant coming out of the air heat exchanger 24. Has been. Specifically, heat exchange is performed between the refrigerant passage connecting the water heat exchanger 22 and the expansion valve 23 and the refrigerant passage connecting the air heat exchanger 24 and the compressor 21.

  The hot water storage device 3 includes a water circulation circuit 30 in which a hot water storage tank 31, a water pipe 22 b in the water heat exchanger 22, and a water circulation pump 32 are annularly connected by a water circulation pipe 35. The control device 4 controls the operation of the heat pump unit 2 and the hot water storage device 3.

<Hot water storage device>
FIG. 3 is a circuit diagram of piping that connects a hot water storage device and a load of the hot water storage type hot water supply apparatus according to the present embodiment. In addition, the load described here refers to hot water supply and a bath. The hot water supply pipe 71 communicates the head of the hot water storage tank 31 with the hot water supply mixing valve 73. The hot water supply pipe 71 has hot water supply branch pipes 71 a and 71 b, the hot water supply branch pipe 71 a connects the hot water supply pipe 71 and the hot water beam mixing valve 74, and the hot water supply branch pipe 71 b includes the hot water supply pipe 71 and the relief valve 75. I'm in touch.

  The water supply pipe 72 connects the water supply source and the hot water supply mixing valve 73. The water supply pipe 72 has water supply branch pipes 72 a and 72 b, the water supply branch pipe 72 a connects the water supply pipe 72 and the hot water mixing valve 74, and the water supply branch pipe 72 b is connected to the water supply pipe 72 and the hot water storage tank 31. In contact with the bottom. A pressure reducing check valve 76 is connected upstream of the water supply branch pipe 72a and the water supply branch pipe 72b. In addition, a water temperature sensor 41 is provided at a position away from the hot water storage tank 31 in the water supply branch pipe 72 b, so that the water temperature sensor 41 is not affected by the temperature from the hot water storage tank 31.

  The hot water circulation pipe 77 communicates the head of the hot water storage tank 31 and the bottom of the hot water storage tank 31, and an additional heat exchanger 78 and a circulation pump 79 are connected on the way.

  The second hot water supply pipe 81 connects the hot water supply mixing valve 73 and the hot water supply port 82, and a hot water supply water amount sensor 42a is disposed on the way. The third hot water supply pipe 83 communicates the hot water beam mixing valve 74 and the bath water circulation pipe 91, and a composite water valve 84 is disposed in the middle. The composite water valve 84 includes a hot water solenoid valve 84a, a drain valve 84b, and a hot water volume sensor 42b.

  The bath water circulation pipe 91 exits from the bathtub 92 and returns to the bathtub 92, and a bath water circulation pump 93 is connected on the way. It should be noted that heat is exchanged between the bath water circulation pipe 91 and the hot water circulation pipe 77 in the memory heat exchanger 78.

  On the side wall of the hot water storage tank 31, temperature sensors 44 a to 44 e are provided as remaining hot water amount detection means at regular intervals from the head to the bottom. By detecting the hot water temperature at each height position of the hot water storage tank 31 with the temperature sensors 44a to 44e, the temperature of the hot water and the remaining hot water amount are calculated. In addition, the hot water storage tank 31 is covered with a heat insulating material on the entire side wall, the head, and the bottom.

<Maintenance of hot water storage device>
Here, the maintenance work of the hot water storage device 3 will be described in detail with reference to the drawings. FIG. 4 is an exploded perspective view of the hot water storage device. In FIG. 4, when removing the front plate 301 from the casing 300 of the hot water storage device 3, first, the four fixing screws 309 are removed. A positioning hole 300a is provided on the front plate 301 side of the casing 300, and a positioning claw 301a for the front plate 301 is inserted therein. In order to separate them, the front plate 301 is slightly moved forward. Pull. Finally, the front plate 301 is moved away from the top plate 302, the right side plate 303, and the left side plate 304 by pulling the front plate 301 downward.

  When the front plate 301 is removed, the hot water storage tank 31, the control box 305, the earth leakage breaker 306, and the mounting plate 307 covered with the heat insulating material can be seen from the front. The earth leakage breaker 306 is fixed on the control box 305. The mounting plate 307 is supported at its ends by the right side plate 303 and the left side plate 304, and is provided with screw holes 307a that are screwed into the fixing screws 309 at predetermined positions.

  The front plate 301 is provided with a work window 301 c at a position facing the control box 305. A frame 310 is fitted into the work window 301c so that the operator does not injure his arm or hand at the end face. The door 311 is provided with a hole 311a through which the long screw 312 passes so that the frame 310 and the door 311 are fixed by the long screw 312, and the frame 310 is screwed with the long screw 312. A hole 310a is provided.

  The door 311 is provided with a small window 311b at a position facing the earth leakage breaker 306. The small window 311b is large enough to expose the earth leakage breaker 306, and is normally closed with a lid 313. A screwed knob 314 is rotatably attached to the lower portion of the lid 313, and this knob 314 is screwed into a screw hole 311c provided below the small window 311b. When testing the operation of the earth leakage breaker 306, the knob 314 is turned to loosen the lid 313 and rotate downward to open the small window 311b.

  As described above, when the hot water storage tank 31 is maintained, the front plate 301 is opened, when the control box 305 is inspected, the door 311 is opened, and when the earth leakage breaker 306 is tested, the lid 313 is opened. That is, the hot water storage device 3 according to the present embodiment can select a location to be opened according to the content of maintenance work.

(Insulation opening)
FIG. 5 is a perspective view showing a state immediately before the heat insulating material and the thermistor are attached to the hot water storage tank. In FIG. 5, the heat insulating material 51 covers almost half of the side wall of the hot water storage tank 31. Although not shown, the side surface opposite to the heat insulating material 51 is also covered with a heat insulating material having substantially the same shape as the heat insulating material 51.

  The heat insulating material 51 has an opening 52, and this opening 52 serves as a working opening when attaching the temperature sensors 44 a to 44 e to the hot water storage tank 31. The harnesses of the temperature sensors 44 a to 44 e are bundled, and the tips of the harnesses are connected to one connector 45.

  The positions at which the temperature sensors 44a to 44e are attached are determined, and protrusions 52a to 52e are provided around the opening 52 so as to serve as marks for the attachment positions of the temperature sensors 44a to 44e. That is, the temperature sensor 44a is affixed to the side of the projection 52a by the operator, similarly, the temperature sensor 44b is lateral to the projection 52b, the temperature sensor 44c is lateral to the projection 52c, and the temperature sensor 44d is On the side of 52d, the temperature sensor 44e is attached to the side of the protrusion 52e.

  The operator attaches the temperature sensors 44 a to 44 e to the side wall of the hot water storage tank 31 from the opening 52, stores the harness in the opening 52, and takes out only the connector 45 to the outside of the opening 52. Then, the opening 52 is covered with a lid.

(Opening lid)
FIG. 6 is a perspective view showing a state immediately before a cover that covers the opening of the heat insulating material is attached to the hot water storage tank to which the heat insulating material and the thermistor are attached. In FIG. 6, the opening 52 is closed with three lids. For convenience, the lid that closes the upper portion of the opening 52 is referred to as a first lid 53a, the lid that closes the central portion of the opening 52 is referred to as a second lid 53b, and the lid that closes the lower portion of the opening 52 is referred to as a third lid 53c.

  The operator first closes the lower portion of the opening 52 with the third lid 53c, then closes the upper portion of the opening 52 with the first lid 53a, and finally closes the central portion of the opening 52 with the second lid 53b. On the other hand, when removing each lid from the opening 52, the center second lid 53b may be removed from the opening 52 first.

  In this way, by closing the openings 52 with the first lid 53a, the second lid 53b, and the third lid 53c, compared to the conventional method in which the same number of openings and lids as the number of temperature sensors are provided, the material, work Man-hours are reduced. Furthermore, since the lid is divided, the lid can be removed even if a pipe is arranged in the vicinity of the opening 52, so that it is easy to use. However, when there is no pipe in the vicinity of the opening 52, it is possible to form the first lid 53a, the second lid 53b, and the third lid 53c integrally formed.

<Features>
(1)
In the hot water storage type hot water heater 1, a plurality of temperature sensors 44 a to 44 e are attached to the side surface of the hot water storage tank 31, and the heat insulating material 51 covers the side surface. The heat insulating material 51 has one opening 52, and the opening 52 faces the mounting positions of the plurality of temperature sensors 44a to 44e. For this reason, since the operator can attach several temperature sensor 44a-44e collectively from one opening, the working efficiency at the time of temperature sensor attachment improves.

  In addition, since protrusions serving as marks for attaching the plurality of temperature sensors 44a to 44e are formed around the opening 52, the operator determines the attachment positions of the temperature sensors 44a to 44e while using the marks as a guide. Work efficiency is improved. Moreover, since it is not necessary to mark the hot water storage tank 31 side, it is easy to use.

  Moreover, since the harness of the temperature sensors 44a to 44e is housed inside the opening 52 and is not exposed to the outside of the heat insulating material 51, the harness is not damaged during the installation of piping or the like, and safety is improved. The attachment work of the member is also easy to do.

(2)
In the hot water storage type water heater 1, the opening 52 is closed with three lids 53a to 53c, and the work of closing the opening with the lid is reduced as compared with the conventional product that requires the same number of openings and lids as the number of temperature sensors. Therefore, work efficiency is improved.

  Further, when there is a pipe of the hot water storage type water heater 1 in front of the opening 52, the lids 53a to 53c are divided at positions where there is a possibility of interference with the pipe. It can be removed, improving usability.

(3)
In the hot water storage type water heater 1, the opening 52 is a long hole along the longitudinal direction of the hot water storage tank 31, so that the operator attaches or removes the temperature sensors 44 a to 44 e from the upper part to the lower part of the opening 52. Or from the lower part to the upper part, it is not necessary to move the work position to the left and right, and the work becomes easier.

  Further, since the harnesses of the plurality of temperature sensors 44a to 44e are bundled in a state in which the plurality of temperature sensors 44a to 44e are arranged substantially at a predetermined interval on one line, the temperature sensor 44a located at the uppermost portion is provided. By being attached first, the other temperature sensors 44b to 44e are arranged in a line on the vertical line, so that positioning to the hot water storage tank 31 is facilitated, and usability is good.

  As described above, according to the present invention, the replacement work of the temperature sensor can be easily performed, so that the present invention is not limited to the hot water storage type water heater, but is useful for facilities where the sensor mounting surface is covered with a heat insulating material.

The external appearance perspective view of the hot water storage type water heater which concerns on this embodiment. The block diagram of the hot water storage type water heater. The circuit diagram of the piping which connects the hot water storage apparatus and load of the hot water storage type water heater. The exploded perspective view of a hot water storage apparatus. The perspective view which shows the state just before affixing a heat insulating material and a thermistor on a hot water storage tank. The perspective view which shows the state just before attaching the cover which covers the opening of a heat insulating material to the hot water storage tank to which the heat insulating material and the thermistor were affixed.

Explanation of symbols

1 Hot water storage type water heater 2 Heat pump unit (heating means)
31 Hot Water Storage Tanks 44a to 44e Temperature Sensor 51 Heat Insulation Material 52 Openings 53a to 53c Lid

Claims (7)

A water heater for storing hot water heated by the heating means (2) in a tank (31),
A plurality of temperature sensors (44a to 44e) attached to the tank (31);
The tank () has a number of openings (52) smaller than the number of the temperature sensors (44a to 44e), and the opening (52) faces a mounting position of the plurality of temperature sensors (44a to 44e). 31) a heat insulating material (51) affixed to,
With
Water heater (1). A plurality of marks (52a to 52e) suggesting a mounting position of the plurality of temperature sensors (44a to 44e) are formed in a peripheral portion of the opening (52).
The water heater (1) according to claim 1. The number of lids (53a to 53c) is smaller than the number of the temperature sensors (44a to 44e) for closing the opening (52).
The water heater (1) according to claim 1 or 2. The number of the openings (52) is one;
The water heater (1) according to any one of claims 1 to 3. The opening (52) is a long hole along the longitudinal direction of the tank (31).
The water heater (1) according to any one of claims 1 to 4. The number of the lids (53a to 53c) was larger than the number of the openings (52).
The water heater (1) according to any one of claims 2 to 5. A plurality of the temperature sensors (44a to 44e) are bundled in a state where the plurality of temperature sensors (44a to 44e) are arranged substantially at a predetermined interval on one line.
The water heater (1) according to any one of claims 1 to 6.

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