JP2012225603A - Storage water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage water heater for preventing degradation of the hot insulation effect caused by the manufacturing errors or the assembly errors.SOLUTION: The storage water heater includes: a hot water storage tank 7 for storing hot water heated by a heating means 2; an exterior case 1 for surrounding the hot water storage tank 7; and a foamed hot-insulation material 26 for executing the hot insulation and heat insulation of the hot water storage tank 7 which is provided in a space between the hot water storage tank 7 and the exterior case 1. The foamed hot-insulation material 26 is divided into at least three sections of: an upper hot-insulation material 27 for covering an upper part of the hot water storage tank 7; an intermediate hot-insulation material 29 for covering an intermediate part of the hot water storage tank 7; and a lower hot-insulation material 28 for covering a lower part of the hot water storage tank 7. Each section is overlapped and joined with an L-shaped lower overlapping part 30 and an inverse L-shaped upper overlapping part 31, which are formed on upper and lower ends respectively. An overlapping adjustment part 34 comprising a spacing between the lower overlapping part 30 and the upper overlapping part 31 and the overlapping length B is provided on the overlapping part thereof in advance. Thus, the hot-insulation effect is continued, and excellent hot insulation is obtained for a long period.

Description

  The present invention relates to a hot water storage type water heater provided with a foam heat insulating material that performs heat insulation and heat insulation of a hot water storage tank of an electric water heater or a heat pump type hot water heater.

  Conventionally, in this type of product, a foamed heat insulating material divided into three parts, upper and middle, is connected between the hot water storage tank and the outer case by concavity and convexity, and the hot water in the hot water storage tank is connected with the heat insulating material. It kept warm well for a long time. (See Patent Document 1.)

Japanese Patent No. 3561239

  By the way, with this conventional product, due to manufacturing errors and assembly errors of the foam heat insulating material itself, it is impossible to fit the concavity and convexity of the connecting part, and a gap is formed in the connecting part, and heat dissipation from this gap progresses and the heat insulating effect is lost. It was something that would end up.

  In order to solve the above-mentioned problems, the present invention has, in particular, a configuration in which a hot water storage tank for storing hot water heated by a heating means, an outer case surrounding the hot water storage tank, and between the hot water storage tank and the outer case In a space provided with a heat insulating material for heat insulation and insulation of the hot water storage tank, the heat insulating material includes an upper heat insulating material that covers an upper part of the hot water storage tank, a middle heat insulating material that covers an intermediate part of the hot water storage tank, and hot water storage Divided into at least three parts of a lower heat insulating material covering the lower part of the tank, each part is formed by superposition with an L-shaped lower overlapping part and an inverted L-shaped upper overlapping part formed at the upper and lower ends, and joined, In this superposition part, a superposition adjusting part consisting of the distance between the superposition part and the superposition part and the superposition length is provided in advance.

  In the present invention, the polymerization length is a distance from a rib protruding from one of the two polymerization portions that closes the gap between the lower polymerization portion and the upper polymerization portion to the upper end of the lower polymerization portion. is there.

  As described above, according to the present invention, when the middle heat insulating material is short, the polymerization state can be maintained by utilizing the polymerization length of the lower polymerization portion and the upper polymerization portion, so that the polymerization state collapses and a gap is formed. When the middle heat insulating material is long, it absorbs the length at the interval between the lower polymerization portion and the upper polymerization portion to prevent the polymerization state from being destroyed, and in any case maintains a good heat retention state. It can be done.

  In addition, by providing ribs between the polymerization of the lower polymerization part and the upper polymerization part, the gap between the lower polymerization part and the upper polymerization part can be reliably closed, the polymerization power is also strong, and the vertical movement of the polymerization part is smooth. It is possible to absorb manufacturing errors and assembly errors without difficulty.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the hot water storage type water heater of one Embodiment of this invention. Sectional drawing of the principal part of the exterior case. Sectional drawing of the principal part of the foam heat insulating material. Explanatory drawing when the same central heat insulating material is short. Explanatory drawing when the same central heat insulating material is long.

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, and covers the upper part of the hot water storage tank 7. The heat insulating material 27, the lower heat insulating material 28 that covers the lower part, and the middle heat insulating material 29 that covers the central body part of the hot water storage tank 7 are divided into three parts.

  An L-shaped lower overlapping portion 30 is formed around the upper end of the middle heat insulating material 29, and an inverted L-shaped upper overlapping portion formed on the entire lower end of the upper heat insulating material 27 is formed in the lower overlapping portion 30. The portion 31 is polymerized, and an L-shaped lower overlapping portion 30 is also formed on the entire upper end of the lower heat insulating material 28. The lower overlapping portion 30 is formed on the entire lower end of the middle heat insulating material 29. The inverted L-shaped upper overlapping portion 31 is polymerized.

  Further, in each of the overlapping portions, when the production size of the middle heat insulating material 29 is long, the distance A between both sides of the lower overlapping portion 30 and the upper overlapping portion 31 is shortened so as to absorb an excessively long portion. On the contrary, when the manufacturing size of the middle heat insulating material 29 is short, it protrudes from the lower part of the upper superposition part 31 toward the lower superposition part 30, and closes the gap 32 formed by the lower superposition part 30 and the upper superposition part 31. The rib 33 absorbs by shortening the polymerization length B to the upper end portion of the lower polymerization portion 30, and the interval A and the polymerization length B constitute the polymerization adjusting portion 34, and foaming is performed. The dimensional error and assembly error of the heat insulating material 26 are adjusted for absorption by shrinking or extending the overlapping portion of the lower overlapping portion 30 and the upper overlapping portion 31. The ribs 33 may protrude from the lower overlapping portion 30 side.

  The heating means 2 includes a compressor 35 for compressing carbon dioxide refrigerant, a refrigerant water heat exchanger 36 as a condenser, a decompressor 37, a heat pump circuit 39 including an air heat exchanger 38 as an evaporator, air A blower 40 for blowing air to the heat exchanger 38, a variable capacity circulation pump 41 provided in the middle of the heating circulation circuit 25, and a refrigerant water heat exchanger 36 provided on the inlet side of the refrigerant water heat exchanger 36 in the heating circulation circuit 25. A heat exchange inlet temperature sensor 42 for detecting the temperature of hot water flowing into the water 36 and a refrigerant water heat exchanger 36 outlet side of the heating circuit 25 and detecting the temperature of hot water flowing out of the refrigerant water heat exchanger 36. A heat exchange outlet temperature sensor 43 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). It heats up the amount of hot water needed for the day and uses it in the daytime (from 7:00 to 23:00) with this hourly light. When the remaining amount of hot water decreases, additional boiling An increase is made. 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 stored hot water 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 and is heated and is heated via the heat pump return pipe 24. The hot water is stored by being returned to the upper part of 7.

  Furthermore, when the hot water storage temperature sensor 21 provided on the side surface of the hot water storage tank 7 detects that a predetermined amount of high temperature water has been stored, or 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 target hot water storage heat amount.

  The remote controller 4 includes a temperature setting switch 45 for setting a hot water supply set temperature, a hot water filling switch 46 for instructing the 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 hot water supply available. An operation unit 49 having a remaining time display switch 48 for displaying time, a display unit 50 made of a dot matrix type fluorescent display tube, the operation unit 49 and the display unit 50 are controlled, and the hot water supply control unit 22 is controlled. The remote control unit 51 is mainly configured with a microcomputer that communicates with the hot water supply temperature and time information set by the operation unit 49 in the display unit 50 and the hot water storage temperature sensor 21 during normal operation. The remaining hot water storage amount to be displayed 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 has decreased during the daytime power hours, and the hot water is stored in the hot water storage tank 7. When 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.

  Next, the characteristics of the assembly of the foam heat insulating material 26 will be described by exemplifying the connection of the upper heat insulating material 27 and the middle heat insulating material 29 in particular. As shown in FIG. 3, the middle heat insulating material 29 covered with the hot water storage tank 7 is shown. The upper L-shaped superposed portion 30 formed on the entire circumference of the lower end of the upper heat insulating material 27 that is also covered with the hot water storage tank 7 The foamed heat insulating material 26 is sandwiched and fixed between the hot water storage tank 7 and the exterior case 1 by covering the exterior case 1 from the outside, and between the lower polymerization portion 30 and the upper polymerization portion 31. Is a polymerization length from the gap A formed between the gap A formed between the lower polymerization portion 30 and the upper polymerization portion 31 to the upper end of the lower polymerization portion 30. A polymerization adjusting unit 34 consisting of B is provided in advance. There.

  And when this superposition | polymerization adjustment part 34 has the manufacturing dimension of the middle part heat insulating material 29 long, as shown in FIG. 4, the space | interval A of the both sides of the lower superposition | polymerization part 30 and the upper superposition | polymerization part 31 is too long. If the manufacturing temperature of the middle heat insulating material 29 is short, the rib that closes the gap 32 formed by the lower overlapping portion 30 and the upper overlapping portion 31 as shown in FIG. 33 absorbs by shortening the polymerization length B to the upper end of the lower overlapping portion 30.

  Thereby, even if a manufacturing error or an assembly error of the foam heat insulating material 26 occurs, these errors are absorbed by the polymerization adjusting portion 34 provided in advance, and it is good without creating a gap in the joint portion between the heat insulating materials. The heat insulation state is continued and reliable heat insulation is performed for a long time.

DESCRIPTION OF SYMBOLS 1 Outer case 2 Heating means 7 Hot water storage tank 26 Foam heat insulating material 27 Upper heat insulating material 28 Lower heat insulating material 29 Lower heat insulating material 30 Middle heat insulating material 30 Lower superposition part 31 Upper superposition part 32 Gap 33 Rib 34 Superposition adjustment part A Interval B Superposition length

Claims (2)

  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 heat insulating material for insulating and warming the hot water storage tank in a space between the hot water storage tank and the outer case. In the above, the heat insulating material is divided into at least three parts: an upper heat insulating material covering the upper part of the hot water storage tank, an intermediate heat insulating material covering the middle part of the hot water storage tank, and a lower heat insulating material covering the lower part of the hot water storage tank, Each part is formed by superposition of an L-shaped lower overlapping portion and an inverted L-shaped upper overlapping portion formed at the upper and lower ends, and the overlapping portion is connected to the interval between the lower overlapping portion and the upper overlapping portion. A hot water storage type hot-water supply machine, characterized in that a polymerization adjusting unit comprising a polymerization length is provided in advance.   2. The polymerization length is defined as a distance from a rib protruding from one of the two polymerization portions that closes a gap between the lower polymerization portion and the upper polymerization portion to an upper end of the lower polymerization portion. The hot water storage water heater described.

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