JP2009047333A - Hot water storage type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater comprising foam insulation capable of obtaining good heat insulating effect for a long time even when the foam insulation shrinks by aged deterioration. <P>SOLUTION: This hot water storage type water heater comprises a hot water storage tank 7 for storing hot water heated by a heating means 2, an outer case 1 surrounding the hot water storage tank 7, and a heat insulating material disposed in a space between the hot water storage tank 7 and the outer case 1 for heat-retention and heat insulation of the hot water storage tank 1, the heat insulating material is composed of the foam insulation 26 divided into a plurality of pieces, each divided foam insulation is provided with an inserting portion 27 having a thickness thinner than a plate thickness, and having the shape projecting outward at an end portion of the foam insulation 26, and an overhung portion 28 overhung outward at a tip part of the inserting portion 27, and further an end portion of the opposed foam insulation 26 is provided with an insert portion 29 to which the inserting portion 27 is fitted, and a locking hole 30 communicated with the insert portion 29 and engaged with the overhung portion 28, thus the release of hot air is suppressed, and good heat insulating effect can be obtained for a long time. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot water storage type water heater provided with a storage tank for storing hot water such as an electric water heater and a heat pump type hot water heater.

Conventionally, in this type, a foamed heat insulating material divided into a plurality of parts is provided between the hot water storage tank and the exterior case, and the divided foamed heat insulating materials are positioned and connected by fitting unevenness. (For example, see Patent Document 1)
Japanese Patent No. 3561239

  By the way, in this conventional thing, since the connection between the divided foam heat insulating materials is only engagement of the fitting unevenness and there is no engagement, when the foam heat insulating material shrinks due to secular change, the abutting portion between the foam heat insulating materials A gap was formed, and hot air was released from the gap to reduce the heat insulation effect, and a good heat insulation effect could not be obtained over a long period of time.

  This invention pays attention to this point and solves the above-mentioned drawbacks. In particular, the construction thereof includes a hot water storage tank for storing hot water heated by a heating means, an exterior case surrounding the hot water storage tank, and the hot water storage tank and the exterior case. Provided with a heat insulating material for heat insulation and heat insulation of the hot water storage tank, the heat insulating material is formed of a plurality of divided foam heat insulating materials, and each of the divided foam heat insulating materials. Is formed with an insertion part formed in a shape that protrudes outwardly by making it thinner than the plate thickness at the end of the foam heat insulating material, and a protruding part that protrudes outward is formed at the tip part of the insertion part, and further facing An end portion of the foam heat insulating material is provided with an insertion portion into which the insertion portion is fitted, and a locking hole that communicates with the insertion portion and engages with the protruding portion.

  According to the present invention, the foamed heat insulating material itself is secularly changed because the insertion part formed with the foamed heat insulating materials on one side is connected by fitting into the other insertion part and locking the overhanging part to the locking hole. Even if a gap is formed between the foam heat insulating materials, the overhanging portion is locked in the locking hole and the insertion portion closes the gap, preventing the release of hot air for a long time. A good heat insulation effect can be obtained across the wall, and the locking between the overhanging portion and the locking hole is further strengthened and surely insulated by contracting in the direction in which the foamed heat insulating material pulls. Will be done.

Next, an embodiment of the present invention will be described with reference to the drawings.
1 is an exterior case constituting a hot water storage tank unit, 2 is a heating means comprising a heat pump unit, 3 is a hot water tap, 4 is a remote controller, 5 is a bathtub, and 6 is a power source.

  In the exterior case 1, a hot water storage tank 7 for storing hot water, a hot water pipe 8 connected to the upper part of the hot water storage tank 7, a water supply pipe 9 connected to the lower part of the hot water storage tank 7, and the hot water pipe 8 A mixing valve 11 for mixing high-temperature water and low-temperature water from the bypass pipe 10 branched from the water supply pipe 9, a hot water supply pipe 12 connected downstream of the mixing valve 11, and a hot water supply temperature sensor provided in the hot water supply pipe 12 13, a hot water flow rate sensor 14 provided in the hot water supply pipe 11, a hot water temperature sensor 15 provided in the water supply pipe 9, a hot water pipe 16 branched from the hot water pipe 12 and connected to the bathtub 5, and this hot water filling An overpressure relief that releases the overpressure of the hot water storage tank 7 that is branched from the hot water pipe 8 and connected to the hot water flow rate sensor 18 that integrates the flow rate flowing through the hot water pipe 16. Provided in the valve 19 and the water supply pipe 9 A hot water supply control mainly composed of a pressure reducing valve 20 for reducing the water supply pressure, a plurality of hot water storage temperature sensors 21 provided in the vertical direction of the side surface of the hot water storage tank 7, and a microcomputer for controlling various devices in the exterior case 1. The unit 22 is configured to include a heating circulation circuit 25 including a heat pump forward pipe 23 and a heat pump return pipe 24 for circulating hot water by connecting the hot water storage tank 7 and the heating means 2.

  Reference numeral 26 denotes a foam heat insulating material made of heat-resistant foamed polystyrene that covers and covers the entire outer surface of the hot water storage tank 7 between the hot water storage tank 7 and the outer case 1. The upper portion covers the upper part of the hot water storage tank 7. It is divided into four parts: a foam heat insulating material 26a, a lower foam heat insulating material 26b that covers the lower part, a front foam heat insulating material 26c that is divided into the front and rear parts of the hot water storage tank 7, and a rear foam heat insulating material 26d. It is what.

  Reference numeral 27 denotes an insertion portion formed at a substantially central portion over the entire width in the height direction, on the other hand, covering the hot water storage tank 7 of the rear cylinder thermal insulation 26d and facing the front cylinder thermal insulation 26c. The portion 27 is thinner than the thickness of the rear foam insulation 26d and protrudes outward, gradually increasing in thickness toward the tip, and a protruding portion 28 projecting outward in a spherical shape is formed at the tip. Is formed.

  Reference numeral 29 denotes an insertion part formed so that the insertion part 27 can be inserted into one end part of the front foam insulation material 26c facing the insertion part 27. The insertion part 27 is formed in the same shape as the insertion part 27 and is inserted into the insertion part 27. In addition, a locking hole 30 that houses and locks the overhanging portion 28 is formed on the back side communicating with the insertion portion 29.

  Further, the remaining end portion from which the insertion portion 27 is protruded protrudes from the inner side of the hot water storage tank 7 to become a convex end 31, and the outer side of the outer case 1 side is retracted to form a concave end 32 so that a step is formed in the connecting portion. The remaining end portion that forms the insertion portion 29 in contact with this end portion has a portion that faces the convex end 31 on the inside as a short short end 33 and a portion that faces the concave end 32 on the outside on the contrary. Thus, the long end 34 is obtained.

  Further, an insertion portion 27 and an overhanging portion 28 may be provided at the opposite end of the body rear foam heat insulating material 26d in the same manner as one, and conversely, an insertion portion 29 and a locking hole 30 are provided on the opposite side. It may be good. Further, the upper foam heat insulating material 26a and the lower foam heat insulating material 26b, and the front and rear foam heat insulating materials 26c and 26d are connected to each other with an insertion portion 27 and an overhanging portion 28, and inserted on the opposite side. This is performed by providing the portion 29 and the locking hole 30.

  The divided foam heat insulating materials 26 are connected to each other so that the front foam heat insulating material 26c and the rear foam heat insulating material 26d are positioned so as to be in close contact with each other so as to cover the outer periphery of the hot water storage tank 7. The insertion portion 27 is passed through the insertion portion 27 so that the portion 29 is slightly widened, and the protruding portion 28 at the tip is fitted into the locking hole 30, so that the insertion portion 29 returns to its original size and the insertion portion 27 is fitted. The foam heat insulating material 26 is firmly connected to each other, and the foam heat insulating material 26 is in close contact with the hot water storage tank 7 so that there is no wobble or misalignment, and the foam heat insulating material 26 shrinks due to secular change. The locking between the overhanging portion 28 and the locking hole 30 becomes stronger, and a reliable connection can be obtained. Moreover, the shrinkage causes a gap between the foamed heat insulating materials 26, but this gap is not related. Inserts that have become solid Due to being blocked middle section 27, without heat is released to the outside foam insulation 26, in which it is possible to obtain a good thermal insulation effect for a long period.

Further, since a step is formed inside and outside at the connecting portion where a gap is generated due to secular change, a sufficient thickness of the foam heat insulating material 26 facing the gap can be secured, and the insertion portion 27 faces the outside gap. And the inner gap between the insertion portion 27 and the thickness of the long end 34 are opposed to each other, so that the strength of the foam heat insulating material 26 itself can be sufficiently maintained and the heat insulating effect can be obtained. It is also possible to suppress the decrease of.
Further, the insertion portion 27 gradually increases toward the outside, and the insertion portion 29 for fitting the insertion portion 27 has the same shape and has a taper shape that becomes narrower toward the outside. This makes it more difficult to pull out and strengthens the connection.

  The heating means 2 includes a compressor 35 that compresses carbon dioxide refrigerant, a refrigerant-water heat exchanger 36 as a condenser, a decompressor 37, and a heat pump circuit 39 including an air heat exchanger 38 as an evaporator, A blower 40 for blowing air to the air heat exchanger 38, a variable capacity circulation pump 41 provided in the middle of the heating circulation circuit 25, a refrigerant-water heat exchanger 36 inlet side of the heating circulation circuit 25, and a refrigerant-water A hot water inlet temperature sensor 42 for detecting the temperature of hot water flowing into the heat exchanger 36 and hot water flowing out of the refrigerant-water heat exchanger 36 are provided on the outlet side of the refrigerant-water heat exchanger 36 of the heating circuit 25. The heat exchange outlet temperature sensor 43 for detecting the temperature of the heating means and a heating control unit 44 mainly composed of a microcomputer for controlling the heating means 2 are configured.

  Here, the power source 6 is an electric lamp according to the time zone, and is set at a low price for power charges at night (from 23:00 to 7:00 here). The amount of stored hot water needed for the day is boiled and used, and the electric light is also supplied in the daytime (from 7 o'clock to 23 o'clock). Boiling is performed. The power source 6 is connected to the hot water supply control unit 22, and power is supplied from the hot water supply control unit 22 to the remote controller 4 and the heating control unit 44 by superimposing communication signals in a wired manner.

When the night time zone is reached, the hot water supply control unit 22 calculates the amount of hot water storage necessary for the next day, and instructs the heating control unit 44 to boil up the target hot water storage amount by the end of the night time zone. The circuit 39 is activated to start driving the circulation pump 41 of the heating circulation circuit 25. Then, the hot water taken out from the lower part of the hot water storage tank 7 by driving the circulation pump 41 flows into the refrigerant-water heat exchanger 36 of the heating means 2 through the heat pump forward pipe 23, is heated, and is stored via the heat pump return pipe 24. By returning to the upper part of the tank 7, hot water is stored.
Further, the heat-pump pipe 23 is not insulated from the foam heat insulating material 26, and COP is improved by not intentionally raising the temperature of the water supplied to the heating means 2.

  Further, when a hot water storage temperature sensor 21 provided on the side surface of the hot water storage tank 7 detects that a predetermined amount of hot water has been stored, or when the heat exchange inlet temperature sensor 42 detects a predetermined temperature or higher, a hot water supply control unit 22 instructs the heating control unit 44 to stop the heating operation, the operation of the heat pump circuit 39 and the circulation pump 41 is stopped, and the hot water storage operation is completed by the end of the night time zone.

  Here, the amount of heat stored in the hot water storage tank 7 is calculated by the hot water supply control unit 22 as a target amount of heat stored in the hot water supply load for the past several days. Varies in the range of 60 ° C. to 90 ° C. depending on the season (or the feed water temperature detected by the feed water temperature sensor 15) and the amount of target hot water stored.

  The remote controller 4 has a temperature setting switch 45 for setting a hot water supply set temperature, a hot water filling switch 46 for instructing hot water filling to the bathtub 5, a hot water filling amount setting switch 47 for setting the hot water filling amount, and a remaining time for hot water supply. An operation unit 49 having a remaining time display switch 48 for displaying the display, a display unit 50 made of a dot matrix type fluorescent display tube, the operation unit 49 and the display unit 50, and the hot water supply control unit 22 A remote control unit 51 mainly composed of a microcomputer that performs communication is provided. During normal operation, the display unit 50 detects the hot water supply set temperature and time information set by the operation unit 49 and the hot water storage temperature sensor 21. The remaining hot water storage amount is displayed. The display unit 50 may be a dot matrix type liquid crystal display unit.

  Next, when the hot-water tap 3 is opened, the hot water in the upper part of the hot water storage tank 7 is pushed out to the hot water discharge pipe 8 by the water supply pressure from the water supply pipe 9, and the mixing pipe 11 controlled by the hot water supply control unit 22 The temperature detected by the low-temperature water and the hot water supply temperature sensor 13 is mixed so as to be the hot water supply set temperature set by the operation unit 49 of the remote controller 4, and hot water is supplied through the hot water supply pipe 12.

  If the amount of hot water supply becomes larger than usual, the hot water supply control unit 22 detects that the remaining hot water storage amount detected by the hot water storage temperature sensor 21 is reduced during the daytime power hours, and the hot water is stored in the hot water storage tank 7. When the hot water is expected to run out, the necessary amount of heat is increased using the daytime power at that time.

  Next, when filling the bathtub 5, when the filling switch 46 of the remote controller 4 is operated, the hot water supply control unit 22 opens the filling valve 17 to start filling, and starts filling. When it is detected that the integrated flow rate from has reached the amount of hot water filling, the hot water filling valve 17 is closed to complete the hot water filling.

  In the embodiment of the foam heat insulating material 26, the insertion portion 27 and the insertion portion 29 opposite to the insertion portion 27 are formed in the height direction of the foam heat insulating material 26. However, the present invention is not limited to this. However, since the hot air from the hot water storage tank 7 is radiated from the gap between the connecting portions generated during this period, it is desirable to make this interval as narrow as possible.

Next, description will be given of another embodiment in which the connection of the foam heat insulating material is shown in the drawing.
The same parts as those of the above embodiment are denoted by the same reference numerals, and only the different parts will be described. The projecting part 52 at the distal end of the insertion part 27 is formed by projecting two ring-shaped parts, and the projecting part 52 is locked. The locking part 53 is also formed as two ring-shaped depressions at the back of the insertion part 29. The protruding part 52 is locked by fitting into the locking part 53, so that the foam heat insulating materials 26 are connected to each other. It is a thing.

  Further, the connection of the partial foam insulation 26 for inspection and replacement of the hot water storage temperature sensor 21 attached to the hot water storage tank 7 will be described with reference to the drawings. An opening 54 is formed in the foam insulation 26 covering the hot water storage tank 7. Then, both sides forming the opening 54 are protruded outward to form insertion portions 55 and 56, and the protruding portions 57 and 58 are slightly overhanged so as to wind the distal ends of the insertion portions 55 and 56 outward. In the partially foamed heat insulating material 59 fitted into the opening 54, there are formed insertion portions 60, 61 into which the insertion portions 55, 56 are fitted, and the end portions of the insertion portions 60, 61 are formed. Are provided with key-shaped locking holes 62 and 63 for locking the overhang portions 57 and 58, and the partially foamed heat insulating material 59 inserts both insertion portions 55 and 56 into the insertion portions 60 and 61. 58 and the locking hole 62, It is intended to be connected by the third locking, engagement of the projecting portions 57 and 58 and the locking hole 62 and 63 are intended to be sealed more firmly engaged in contraction due to aging of the foam insulation.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the hot water storage type water heater of one Embodiment of this invention. The longitudinal cross-sectional view of the hot water storage tank unit. The cross-sectional view of the hot water storage tank unit. Sectional drawing of the connection part of the principal part foaming heat insulating material. Sectional drawing of the connection part of the foam heat insulating material which shows other embodiment. Sectional drawing of the connection part of a partial foaming heat insulating material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exterior case 2 Heating means 7 Hot water storage tank 26 Foam heat insulating material 27 Insertion part 28 Overhang | projection part 29 Insertion part 30 Locking hole

Claims (1)

  A hot water storage tank for storing hot water heated by the heating means, an outer case surrounding the hot water storage tank, and a space between the hot water storage tank and the outer case provided with a heat insulating material for heat insulation and heat insulation of the hot water storage tank. Preferably, the heat insulating material is formed of a plurality of divided foam heat insulating materials, and each of the divided foam heat insulating materials protrudes outward by being thinner than a plate thickness at an end of the foam heat insulating material. An insertion portion having a shape that is formed, and a protruding portion that protrudes outward is formed at the distal end portion of the insertion portion, and an insertion portion into which the insertion portion is fitted is formed at the end portion of the opposed foam heat insulating material, A hot water storage type hot-water supply machine characterized in that a locking hole that communicates with the insertion part and engages with an overhanging part is provided.

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