JP2023022940A - Heat storage type hot water supply device and hot water storage type heat pump hot water supply device - Google Patents

Abstract

To prevent agitation of fluid (water, hot water) within a tank even if a baffle plate is installed in an inclination part of the tank.SOLUTION: A heat storage type hot water supply device is configured such that a baffle plate installed in a lower inclination area in a position opposite to an inflow direction of water from a water supply port of a hot water storage tank having a drain port has an outer peripheral edge in which an edge projects toward a bottom wall surface of the hot water storage tank, an angle of the outside of the baffle plate formed by an extension line of the outer peripheral edge of the baffle plate and the bottom wall surface of the hot water storage tank is set to an outer peripheral side angle, and the outer peripheral side angle of a proximity area is larger than the outer peripheral side angle of a remote area when a side closer to the drain port of the baffle plate is set to be the proximity area and a side away from the drain port is set to be the remote area so as to solve problems.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a regenerative hot water supply apparatus and a storage heat pump water supply apparatus, and particularly to a regenerative hot water supply apparatus and a storage heat pump hot water supply apparatus suitable for those having a baffle plate for suppressing agitation of water or warm water flowing into a tank. Regarding the device.

As a technology for reducing energy consumption related to hot water supply, there is a technology for storing heat in a hot water storage tank before using the amount of hot water to be supplied. When hot water to be used is obtained on demand, generally a large amount of heat is required to be supplied, and it is necessary to use an energy source with a high energy density and an increase in the size of equipment.
On the other hand, with the method of storing heat before use, it is possible to secure the amount of hot water to be used in a day, for example, over 24 hours.
As a method for storing hot water in a hot water storage tank, tap water is stored in advance in the hot water storage tank, and a heat source device is used to heat the water and store heat in the hot water storage tank.
With this method, a temperature stratification is formed in which the lower part of the hot water tank is the cold water area and the upper part of the hot water tank is the hot water area. It has the characteristic that uniformity of temperature is suppressed.
Therefore, in order to operate the above system, a technique is required to prevent convection as much as possible in supplying water to the lower part of the hot water storage tank or returning hot water to the upper part of the hot water storage tank.
Patent Document 1 can be cited as a prior art document related to such technology. In this patent document 1, a baffle plate forming a surface perpendicular to the water inlet direction is provided on the water inlet side of the lower part of the vertical central axis of the hot water storage tank, and a rim is formed on the outer periphery of this baffle plate. Techniques for suppressing mixing of thermal stratification due to are described.

JP-A-8-327147

According to Patent Document 1 mentioned above, the water entering the lower portion of the hot water storage tank collides with the baffle plate, and the flow that collides with the baffle plate flows out into the hot water storage tank through the gap between the baffle plate and the bottom surface of the hot water storage tank. A flow field oriented all around the inside of the tank is created.
As a result, the maximum flow velocity is lower than the flow at the water supply port, so the kinetic energy of the flow is reduced and agitation in the hot water storage tank is suppressed.

By the way, among various hot water storage tanks, there is a hot water storage tank provided with a drain port on the bottom surface thereof for cleaning the inside of the hot water storage tank and for using water in an emergency.

In this type of hot water storage tank, the drain port provided on the bottom surface of the hot water storage tank is positioned at the lowest point in the hot water storage tank for the purpose of discharging the water in the hot water storage tank without adding energy such as a pump. It's becoming

For this reason, the bottom surface of the hot water storage tank has a portion that slopes toward the drain port of the bottom surface of the hot water storage tank, and the water supply port that supplies tap water is positioned in the sloped portion.

When the baffle plate described in Patent Document 1 is provided at a position facing the water supply direction of the water supply port located on the inclined portion of the bottom surface of the hot water storage tank, the baffle plate can be installed perpendicularly to the water supply direction. In the flow of water flowing out from the gap between the outer peripheral edge of the baffle plate and the bottom surface of the hot water storage tank, a flow up the slope of the inclined portion of the bottom surface of the hot water storage tank and a flow down the slope are generated.

However, in this case, the upper portion of the hot water storage tank may be agitated by the flow of water running up the inclined portion of the bottom surface of the hot water storage tank, and the agitation in the hot water storage tank may not be sufficiently suppressed.

Further, at the top of the hot water storage tank, a hot water outlet provided at the top of the hot water storage tank is positioned at the uppermost position in the hot water storage tank for the purpose of discharging hot water in the hot water storage tank.

Therefore, there is a portion at the top of the hot water storage tank that slopes toward the hot water outlet of the top of the hot water storage tank, and the hot water inlet that supplies hot water is positioned at the slope.

When the baffle plate described in Patent Document 1 is provided at a position facing the inflow direction of the hot water inlet located on the slope of the top of the hot water storage tank, the baffle plate is installed perpendicular to the inflow direction of the hot water. As a result, the hot water flowing out from the gap between the outer edge of the baffle plate and the top of the hot water storage tank has a flow down the slope of the top of the hot water storage tank and a flow up the slope.

However, in this case, the lower part of the hot water storage tank is agitated by the hot water flowing down the inclined portion of the top of the hot water storage tank, and there is a possibility that the agitation in the hot water storage tank cannot be sufficiently suppressed.
The present invention has been made in view of the above points, and its object is to suppress agitation of the fluid (water, hot water) in the tank even if a baffle plate is installed on the inclined part of the tank. To provide a heat storage type hot water supply system and a hot water storage type heat pump water supply system capable of

In order to achieve the above object, the heat storage hot water supply apparatus of the present invention comprises a tank and a heat source machine connected to the tank, wherein the bottom of the tank and the inflow side of the heat source machine are connected, the top of the tank and the outflow side of the heat source machine are connected,
The tank has a water supply port for inflowing water at its bottom and a water outlet for outflowing water, and a hot water inlet for inflowing hot water and a hot water outlet for outflowing hot water at its top,
and a lower sloping region rising outward from the water discharge port and/or an upper sloping region falling outward from the tap outlet, and the water supply port is arranged in the lower sloping region. and/or the hot water inlet is located in the upper sloped region,
A heat storage type in which a baffle plate is installed in the lower inclined area facing the inflow direction of water from the water supply port and/or the upper inclined area facing the inflow direction of hot water from the hot water inlet. A water heater,
The baffle plate has an outer peripheral end portion whose end protrudes toward the bottom wall surface and/or the top wall surface of the tank, and an extension line of the outer peripheral end portion of the baffle plate and the bottom wall surface and/or the tank bottom wall surface. Alternatively, the outer angle of the baffle plate formed with the top wall surface is defined as the outer peripheral angle, and the side of the baffle plate closer to the drain port or the hot water outlet is the adjacent area, and the side farther from the drain port or the hot water outlet is Whether the outer angle of the near area is larger than the outer angle of the remote area when the remote area is set,
Alternatively, the baffle plate has an outer peripheral end portion whose end portion protrudes toward the bottom wall surface and/or the top wall surface of the tank, and the side of the baffle plate near the drain port or the hot water outlet is defined as the adjacent region. , the side far from the drain port or the hot water outlet is defined as a remote region, and the distance between the outer peripheral edge of the remote region of the baffle plate and the outer peripheral end of the adjacent region and the bottom wall surface of the tank is the outer peripheral distance. , the outer distance of the close area is larger than the outer distance of the remote area.

In order to achieve the above object, the hot water storage type heat pump water heater of the present invention includes compression means for compressing a refrigerant, heating means for heating water fed with the refrigerant compressed by the compression means, A heat source device having at least an expansion means for expanding and an evaporating means for heating the refrigerant is connected to a hot water storage tank of a regenerative hot water supply device, and the compressing means, the heating means, the expanding means and the evaporating means are arranged in an annular shape. and a hot water storage type heat pump water heater in which the refrigerant is sealed in the annular flow path, wherein the heat storage type hot water supply device is the heat storage type hot water supply device configured as described above. .

ADVANTAGE OF THE INVENTION According to this invention, even if it installs a baffle plate in the inclination part of a tank, stirring of the fluid (water, warm water) in a tank can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a system schematic diagram showing a CO2 heat pump water heater in which the heat storage type water heater of the present invention is adopted; 1 is an enlarged view of the vicinity of a tank bottom portion showing Embodiment 1 of a heat storage type hot water supply apparatus of the present invention; FIG. 1 is a perspective view of a baffle plate employed in Embodiment 1 of a thermal storage hot water supply apparatus of the present invention; FIG. It is an enlarged view near the bottom of a tank showing a conventional heat storage type hot water supply device. FIG. 10 is an enlarged view of the vicinity of the bottom of a tank showing the state of cold water flow in a heat storage type hot water supply apparatus of conventional structure. Fig. 2 is an enlarged view of the vicinity of the bottom of the tank showing the flow of cold water in the first embodiment of the heat storage type hot water supply apparatus of the present invention; Fig. 2 is an enlarged view of the vicinity of the bottom of a tank showing a second embodiment of the heat storage type hot water supply apparatus of the present invention; FIG. 10 is a perspective view of a baffle plate employed in Embodiment 2 of the thermal storage hot water supply apparatus of the present invention; Fig. 10 is an enlarged view of the vicinity of the bottom of the tank showing the flow of cold water in the second embodiment of the heat storage type hot water supply apparatus of the present invention; Fig. 10 is an enlarged view of the vicinity of the bottom of the tank showing the third embodiment of the heat storage type hot water supply apparatus of the present invention; FIG. 8 is a perspective view of a baffle plate employed in Embodiment 3 of the thermal storage hot water supply apparatus of the present invention; FIG. 11 is an enlarged view of the vicinity of the bottom of the tank showing the flow of cold water in Example 3 of the thermal storage hot water supply apparatus of the present invention; FIG. 11 is a perspective view of a baffle plate employed in Embodiment 4 of the thermal storage hot water supply apparatus of the present invention; FIG. 11 is an enlarged view of the vicinity of the bottom of the tank showing the flow of cold water in Embodiment 4 of the thermal storage hot water supply apparatus of the present invention; It is an enlarged view near the tank top part which shows Example 5 of the heat storage type hot-water supply apparatus of this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The thermal storage hot water supply system and hot water storage type heat pump hot water supply system of the present invention will be described below based on the illustrated embodiments. In addition, in each figure, the same code|symbol is used for the same component.

FIG. 1 shows a system schematic diagram of a CO2 heat pump water heater (hot water storage type heat pump water heater) in which the thermal storage type water heater of the present invention is adopted.

As shown in FIG. 1, the CO2 heat pump water heater includes a compressor 102 as compression means, a water-refrigerant heat exchanger 103 as heating means, an expansion valve 104 as expansion means, an evaporator 105 as evaporation means, and a propeller fan. 106 and the hot water storage tank 1 .

The compressor 102, the water-refrigerant heat exchanger 103, the expansion valve 104, and the evaporator 105 are connected in order by pipes, and the evaporator 105 and the compressor 102 are also connected by pipes to form a closed loop. . A heat pump cycle (annular flow path 100) is configured by enclosing R744, which is a CO2 refrigerant, in this loop.

The evaporator 105 is composed of fins and heat transfer tubes, and the heat transfer tubes pass through the stacked fins so that air can flow between the heat transfer tubes. A propeller fan 106 is installed.

The hot water storage tank 1 has a hollow structure in which the top and bottom of a cylindrical sheet metal is covered with a conical sheet metal. 3, the lid provided on the upper side of the hot water storage tank 1 is referred to as the tank top portion 3, and the lid provided on the lower side of the hot water storage tank 1 is referred to as the tank bottom portion 2). Two holes are provided in the tank bottom 2 through the sheet metal, and a drain port 5 (see FIG. 2) is provided at the apex of the conical structure (also the vertical central axis P of the hot water storage tank 1). A water supply port 4 (see FIG. 2) is provided in the middle of the side inclined region 9a.

The drain port 5 is connected to the outside of the hot water storage tank 1 via a drain valve 110. By opening the drain valve 110, the inside of the hot water storage tank 1 is opened to the outside. It is connected via a valve 111 and is also connected to the water-refrigerant heat exchanger 103 of the heat source equipment 101 . A water pump 107 is installed between the water supply port 4 and the water-refrigerant heat exchanger 103 , and the water stored in the hot water storage tank 1 can be fed to the water-refrigerant heat exchanger 103 by the water pump 107 . Therefore, the water supply port 4 also serves as the water supply port 6 (see FIG. 2) for the heat source device 101 .

On the other hand, for the tank top 3, as shown in FIG. 15, a hot water outlet 8 is provided at the top of the conical structure (which is also the central axis P in the vertical direction of the hot water storage tank 1), and in the middle of the upper inclined region 9b. A hot water inlet 7 is provided. The hot water inlet 7 is connected to the outlet side of the water-refrigerant heat exchanger 103, thereby forming a path through which water flows in the order of the tank bottom 2, the water pump 107, the water-refrigerant heat exchanger 103, and the tank top 3. The hot water supply port 8 is connected to the hot water supply port 109 by piping. Since a pipe branched from the water pipe 108 is connected between the hot water outlet 8 and the hot water supply port 109, it is possible to mix water and hot water.

In the water-refrigerant heat exchanger 103, the flow paths of the refrigerant and water are in contact with each other so that the refrigerant and water flow in opposite directions. However, it is not always necessary to have a completely counterflow, and a configuration in which the flow paths are partially perpendicular to each other is also acceptable.

A baffle plate 20A is installed near the tank bottom 2 inside the hot water storage tank 1 . The baffle plate 20A has a structure in which the water supply port 4 is covered with an umbrella-shaped structure with edges, that is, a structure having outer peripheral ends 27f and 27c whose ends protrude toward the wall surface of the tank bottom 2. It's becoming

Embodiment 1 of the regenerative hot water supply apparatus of the present invention will be described with reference to FIGS. 2, 3 and 6. FIG.

As shown in FIG. 2, the above-described baffle plate 20A is installed in the middle of the lower inclined region 9a away from the drain port 5 of the tank bottom 2, and also serves as a connecting portion for the water supply port 4 and the water supply port 6. It is arranged on the extension line of the inflow connection part 12, that is, on the extension line of the inflow direction of the water flowing through the water supply port 4, and in parallel with the lower inclined region 9a.

Also, the ceiling portion of the baffle plate 20A is called a collision portion 26 because the water flow from the water supply direction of the water supply port 4 collides therewith. Furthermore, the baffle plate 20A has an umbrella-like structure with edges (outer peripheral ends 27f and 27c) as described above, and the outer peripheral ends (edges) 27f and 27c of the baffle plate 20A are also arranged close to the wall surface of the tank bottom 2 .

In this embodiment, the sides of the outer peripheral ends 27f and 27c of the baffle plate 20A near the drain port 5 of the hot water storage tank 1 are defined as the adjacent region 11, and the sides far from the drain port 5 of the hot water tank 1 are defined as the remote region 10. That is, the upper side of the slope of the lower side slope area 9a of the tank bottom 2 is the remote area 10, and the lower side of the slope of the lower side slope area 9a is the close area 11. As shown in FIG.

Further, in this embodiment, in the above-described remote region 10 and proximity region 11, the angle formed between the outer peripheral edge 27f and the wall surface of the tank bottom 2 at the outer peripheral edge 27c and the tank bottom at the outer peripheral edge 27f and the outer peripheral edge 27c 2 are different in distance from the wall surface.

Specifically, regarding the outer angles of the baffle plate 20A formed by the extension lines of the outer peripheral ends 27f and 27c of the baffle plate 20A and the wall surface of the tank bottom 2 (outer peripheral angles 29f and 29c), the outer peripheral side of the remote region 10 The outer peripheral side angle 29c of the proximity region 11 is made larger than the angle 29f. Note that the outer peripheral side angle 29f of the remote region 10 is a right angle in this embodiment.

In addition, the shortest distances (outer distances 30f and 30c) between the outer peripheral end 27f of the remote region 10 and the outer peripheral end 27c of the proximal region 11 of the bale plate 20A and the wall surface of the tank bottom 2 are also The outer peripheral side distance 30c of the proximity area 11 is made larger than the distance 30f.

FIG. 3 shows a perspective view of the baffle plate 20A in this embodiment.

As described above, in this embodiment, the remote region 10 and the proximal region 11 of the baffle plate 20A have different angles 29f and 29c. A peripheral connection portion 28 for connection is provided. That is, since the outer peripheral side angles 29f and 29c are different between the remote region 10 and the proximal region 11, the respective outer peripheral end portions 27f and 27c are connected by the outer peripheral connection portion 28 so as to be seamless.

In the present embodiment, the area of the outer peripheral connection portion 28 is smaller than the outer peripheral end portions 27f and 27c corresponding to the proximity region 11 and the remote region 10, but the area of the outer peripheral connection portion 28 is smaller than the outer peripheral end portions 27f and 27c. Larger structures are also acceptable.

Further, in this embodiment, as shown in FIG. 2, the baffle plate 20A and the wall surface of the lower inclined region 9a of the tank bottom 2 are connected by a support 21. As shown in FIG. The strut 21 serves to connect the flat plate portion of the baffle plate 20A forming the same plane as the collision portion 26 and the wall surface of the lower inclined region 9a of the tank bottom 2, and is joined by welding. .

In order to explain the difference between this embodiment and the prior art, FIG. 4 shows an enlarged view of the tank bottom 2 in which the prior art baffle plate 20 is installed.

The basic structure of the tank bottom 2 shown in FIG. 4 is the same as that of FIG. 2 of this embodiment, but the shape of the baffle plate 20 is different from that of the baffle plate 20A of this embodiment. Specifically, in the prior art shown in FIG. 4, the outer peripheral side angles 29f and 29c of the remote region 10 and the proximal region 11 are both right angles. The outer distances 30f and 30c are the same.
The action and effect of this embodiment will be described. At the start of use, tap water is supplied from the water pipe 108 to the hot water storage tank 1 to fill the inside of the hot water storage tank 1 with water. At this time, the tap pressure is reduced to a predetermined pressure through the pressure reducing valve 111 . The cold water stored in the hot water storage tank 1 is boiled in a time slot set by the user. During the boiling operation, the water pump 107 operates to supply cold water from the tank bottom 2 to the water-refrigerant heat exchanger 103 . At the same time, electric power is applied to the compressor 102 to start compressing the refrigerant, and the CO2 refrigerant flows through the water-refrigerant heat exchanger 103, the expansion valve 104, and the evaporator 105 in this order. After a certain period of time has passed since the start of driving of the compressor 102, the temperature of the refrigerant after compression reaches the set temperature, and heat exchange between the refrigerant and cold water occurs in the water-refrigerant heat exchanger 103, and the cold water reaches 65°C. Heated to ~90°C warm water. The heated hot water is returned to the tank top 3 from a hot water inlet 7 in the tank top 3 .
As for the refrigerant, the water-refrigerant heat exchanger 103 gives heat to the chilled water, so that the temperature of the refrigerant drops to room temperature. Then, in the evaporator 105, the air flow generated by the propeller fan 106 exchanges heat with the low-temperature refrigerant to obtain heat from the outside air, after which the heat returns to the compressor 102 again.
By continuing the above operation, hot water starts to accumulate in the upper part of the hot water storage tank 1, and eventually the hot water area reaches the lower part of the hot water storage tank 1, and most of the inside of the hot water storage tank 1 is filled with hot water.
When using hot water, the hot water is taken out from the hot water outlet 8 and sent to the hot water supply opening 109. - 特許庁At this time, hot water is supplied to the hot water supply port 109 and at the same time, tap water is supplied from the water supply port 4 installed at the tank bottom 2 of the hot water storage tank 1 .
When the temperature of the stored hot water is higher than desired by the user, it is delivered to the hot water supply port 109 after being mixed with cold water flowing through a pipe branched from the water pipe 108 . When the hot water in the hot water storage tank 1 is used, the pressure from the water pipe 108 is applied, so the hot water can be delivered to the hot water supply port 109 without power such as a pump. However, when the position of the hot water supply port 109 is significantly higher than the hot water storage tank 1, a separate pump for pressurization can be used.

The water stored in the hot water storage tank 1 can be drained by opening the drain valve 110 as needed. Usage cases include washing off dirt accumulated in the hot water storage tank 1, securing domestic water when water is cut off due to disasters, and the like. These use cases require that all stored water can be withdrawn. Therefore, in this embodiment, the drain port 5 is provided at the apex of the conical structure of the tank bottom 2 .

In addition, when the tank bottom 2 is not conical, the intended effect can be obtained by providing the drain port 5 at the lowest position. Therefore, the drain port 5 does not necessarily have to be on the central axis of the tank bottom 2 .

As described above, since the drain port 5 is installed at the apex of the conical structure, the inflow connection portion 12, which also serves as the connection portion for the water supply port 4 or the water supply port 6, is installed in the lower inclined region 9a of the conical structure. I have no choice. The lower inclined region 9 a referred to here refers to a region configured to allow water to flow to the drain port 5 , so it can be rephrased as a non-vertical portion positioned higher than the drain port 5 . That is, it includes a flat surface formed by processing a part of the slope of the lower slope region 9a.

FIG. 5 shows the state of the flow of cold water when the baffle plate 20 having the conventional structure is installed in the tank bottom 2 in the operation of the prior art for sending hot water from the hot water storage tank 1 to the hot water supply port 109 .

Cold water flowing through the water pipe 108 flows into the hot water storage tank 1 from the water supply port 4, and then reaches the collision part 26 of the baffle plate 20 to change the flow direction. The cold water that has flowed in flows along the wall surface of the baffle plate 20 as indicated by the arrows in FIG. flow into 1.

At this time, both the remote area 10 and the close area 11 form a right angle with the tank bottom 2 (peripheral side angles 29f and 29c), and the widths (distances) of the outer peripheral side distances 30f and 30c are the same. is. Therefore, the flows reaching the remote region 10 and the proximal region 11 pass through the outer distances 30f and 30c at equal flow rates and flow velocities.

In addition, since the flow collides perpendicularly with the wall surface of the lower inclined region 9a of the tank bottom 2, the inflowing flow receives a counteracting force from the tank bottom 2 and has a component in the direction away from the wall surface of the tank bottom 2. A flow spreading along the wall surface of the tank bottom part 2 is formed while holding it.

When such a flow occurs, in the area A (remote area 10) shown in FIG. The hot water in the tank bottom 2 is mixed with the cold water in the tank bottom 2 . Mixing hot water and cold water increases the amount of hot water below 40°C, which cannot be used for filling or supplying hot water. Since the hot water below about 40° C. cannot be used for bathing or hot water supply, it is necessary to raise the temperature again by boiling it with the heat source device 101 or the like. However, there is a characteristic that the coefficient of performance of the heat pump cycle 100 decreases during reheating of hot water.

As described above, the stirring in the hot water storage tank 1 ultimately increases the power consumption related to hot water supply.

On the other hand, FIG. 6 shows the state of the flow in the tank bottom 2 when this embodiment is used.

As shown in FIG. 6, in this embodiment, the outer angle 29c and the outer distance 30c of the proximity area 11 are larger than the outer angle 29f and the outer distance 30f of the remote area 10. FIG.

When cold water flows into the structure of this embodiment from the water supply port 4, the flow passing through the wall surface of the baffle plate 20A in the remote area 10 changes its direction toward the tank bottom 2 side, and reaches the wall surface of the tank bottom 2. will collide almost vertically. At this time, since the direction of the flow changes abruptly, a stagnation area occurs in the tank bottom 2 and the static pressure increases.

On the other hand, in the proximity region 11, since the outer peripheral side angle 29c is large, the flow flowing out from the outer peripheral side distance 30c of the outer peripheral end portion 27c collides with the wall surface of the tank bottom portion 2 obliquely.

Therefore, the static pressure on the flow impingement surface is reduced in the proximal region 11 compared to the remote region 10, and the flow velocity can be increased. In addition, since the outer distance 30c in the near area 11 is larger than the outer distance 30f in the remote area 10, the flow rate increases when the flow velocity remains the same.

With the above two effects, it is possible to increase the flow rate and flow velocity in the adjacent area 11 and reduce the flow rate and flow velocity in the remote area 10 side, thereby causing the outflow from the remote area 10 side that occurs when the conventional technology is used. Agitation due to upward flow can be suppressed.

In this embodiment, an example is shown in which the water supply port 4 and the water supply port 6 share the flow path. The water inlet 6 may be installed in a different area of the lower slope area 9a.

A second embodiment of the heat storage hot water supply apparatus of the present invention will be described with reference to FIGS. 7, 8 and 9. FIG.
The present embodiment shown in the figure differs from the first embodiment in the shape of the baffle plate. The following description will focus on the differences from the first embodiment.
FIG. 7 shows an enlarged view of the tank bottom 2 in this embodiment.
As shown in FIG. 7, the baffle plate 20B of this embodiment has a basic structure in which the outer periphery of a flat plate is bent at right angles, and the flat plate portion serving as the collision part 26 extends in the water supply direction (upward direction in FIG. 7). ) and in the middle of the wall surface of the lower inclined area 9a of the tank bottom 2, non-parallel to the wall surface of the lower inclined area 9a. For this reason, the ends of the struts 21 have joint surfaces with the same angle as the inclination of the lower inclined region 9a.

Comparing the remote region 10 and the proximal region 11 of the baffle plate 20B in this embodiment, in this embodiment, regarding the outer peripheral side angles 29f and 29c of the remote region 10 and the proximal region 11, the outer peripheral side angle 29c of the proximal region 11 is 90 degrees or more, and the outer peripheral side angle 29f of the remote region 10 is 90 degrees or less. As for the outer distances 30 f and 30 c of the remote area 10 and the proximity area 11 , the outer distance 30 c of the proximity area 11 is set larger than the outer distance 30 f of the remote area 10 .

Furthermore, in this embodiment, the outer distances 30f and 30c in the near area 11 and the remote area 10 are larger than the vertical lengths of the collision portion 26 and the outer peripheral ends 27f and 27c. In other words, the distance between the edge of the baffle plate 20B (outer peripheral ends 27f and 27c) and the wall surface of the tank bottom 2 is greater than the vertical height (length) of the edge of the baffle plate 20B (outer peripheral ends 27f and 27c). The gaps (peripheral side distances 30f and 30c) are formed large.

FIG. 8 shows a perspective view of the baffle plate 20B of this embodiment.

As shown in FIG. 8, the support 21 connecting the baffle plate 20B and the tank bottom 2 of this embodiment has a structure in which the outer peripheral ends 27f and 20c of the baffle plate 20B are extended (the baffle plate 20B and the support 21 are integrated). It has become. However, a cut portion 22 without an edge is formed between the portion of the support 21 and the portions of the edges (outer peripheral ends 27f and 27c).

The operation and effects of the structure of this embodiment will be described with reference to FIG.

As shown by the arrows in FIG. 9, the flow from the water supply port 4 reaches the collision part 26 of the baffle plate 20B, flows along the wall surface of the baffle plate 20B, and flows along the outer peripheral ends 27f and 27c and the tank bottom 2. It flows out from the gaps (outer circumference side distances 30f and 30c). At this time, since the outer peripheral side angle 29 f is smaller than 90 degrees in the remote region 10 , part of the flow that collides with the tank bottom 2 is returned toward the water inlet 4 . On the other hand, since the outer peripheral side angle 29c of the adjacent region 11 is larger than 90 degrees, the flow passing through the wall surface of the baffle plate 20B is difficult to return to the direction of the water supply port 4. FIG.

In addition, since the outer distance 30c of the adjacent area 11 is larger than the outer distance 30f of the remote area 10, the flow resistance in the adjacent area 11 is reduced and the flow rate is increased.
Furthermore, when the outer distances 30f and 30c are small in both the remote region 10 and the proximal region 11, the cross-sectional area of the gaps (outer distances 30f and 30c) through which the flow passes becomes smaller, so the flow velocity increases even with the same flow rate. As a result, the energy of the flow that agitates the inside of the hot water storage tank 1 is increased.
On the other hand, in this embodiment, since the vertical distance between the collision part 26 and the outer peripheral ends 27f and 27c of the remote area 10 and the adjacent area 11 is smaller than the outer peripheral distances 30f and 30c, the flow velocity increases. Therefore, the agitation in the hot water storage tank 1 is further suppressed.
Further, by moving the strut 21 closer to the outer peripheral ends 27f and 27c of the remote region 10 and the proximal region 11, the ratio of the area through which the flow spreading in the circumferential direction from the collision part 26 can pass increases. and the tank bottom 2 can be used widely, thereby reducing the flow velocity even when the flow rate is the same, thereby suppressing agitation.

In manufacturing the baffle plate 20B of this embodiment, a method of bending the outer peripheral side of the disk at right angles is assumed.

If the entire circumference is connected, there is a possibility that wrinkles or the like may occur during bending, making production difficult. Since it is provided, the workability of bending is improved, and it is possible to manufacture a flexible end shape according to requirements. In addition, in this embodiment, the cut section 22 is provided adjacent to the strut 21. This offsets the effect that the flow easily flows out through the cut section 22 and the effect that the flow is blocked by the strut 21. effective.

With the above structure, the same effect as in the first embodiment can be obtained, and the agitation in the hot water storage tank 1 can be further suppressed as compared with the first embodiment.

A third embodiment of the heat storage hot water supply apparatus of the present invention will be described with reference to FIGS. 10, 11 and 12. FIG.
In the present embodiment shown in the figure, compared with the second embodiment, a recessed portion 9A is provided in the lower inclined region 9a of the tank bottom portion 2, and the outer peripheral end portions 27f and 27c of the baffle plate 20C are changed. . In the following, the differences from the second embodiment will be mainly described.
FIG. 10 shows an enlarged view of the tank bottom 2 in this embodiment.
As shown in FIG. 10, in this embodiment, a recessed portion 9A having a horizontal bottom surface is provided in the lower inclined region 9a of the tank bottom portion 2. As shown in FIG. By providing the dug portion 9A, the water supply port 4 and the bottom surface of the dug portion 9A are vertically connected at the inflow connection portion 12. As shown in FIG. Moreover, the bottom diameter L1 of the dug portion 9A is smaller than the diameter L2 of the outer peripheral end portions 27f and 27c of the baffle plate 20C.
Further, regarding the baffle plate 20C, the vertical length of the outer peripheral edge 27c in the proximal region 11 is longer than the vertical length of the outer peripheral edge 27f in the remote region 10. As shown in FIG.
Further, as shown in FIG. 11, the baffle plate 20C of this embodiment has corrugated uneven portions 23 around the entire periphery of the ends of the outer peripheral end portions 27f and 27c excluding the struts 21 and the cut portions 22. there is

The action and effect of the structure of this embodiment will be described with reference to FIG.

As described above, in the present embodiment, the recessed portion 9A having a horizontal bottom surface is provided in the lower inclined region 9a of the tank bottom portion 2. By providing the recessed portion 9A, the water supply port 4 can be positioned vertically. Since it is easier to join in the direction and the variation in the inflow angle due to manufacturing errors can be reduced, the flow that flows out from the gap between the outer peripheral ends 27f and 27c of the remote area 10 and the proximal area 11 (outer distances 30f and 30c). It becomes easier to adjust the flow rate ratio of

Further, since the bottom diameter L1 of the dug portion 9A is smaller than the diameter L2 of the outer peripheral end portions 27f and 27c of the baffle plate 20C, the flow passing through the collision portion 26 and reaching the outer peripheral end portions 27f and 27c is It becomes difficult to stay in the dug portion 9A.
Furthermore, when the flow that has flowed in from the water supply port 4 passes through the collision portion 26 and flows out from the outer peripheral end portions 27f and 27c, the distance between the remote region 10 and the adjacent region 11 (the outer peripheral end portions 27f and 27c) is are different, the flow outflowing into the hot water storage tank 1 through the adjacent region 11 is sharper in the region near the tank bottom 2 than when the lengths of the edges (the outer peripheral ends 27f and 27c) are the same. bend into. As a result, the static pressure in the vicinity of the tank bottom 2 increases, making it difficult for the flow to pass through and reducing the flow rate.
This action can be used to adjust the flow rate ratio of the flow passing through the gap between the remote region 10 and the proximal region 11 (outer distances 30f and 30c). Therefore, it is possible to adjust the flow rate ratio to be suitable for the lower inclined region 9a having various angles.

Further, in this embodiment, the outer peripheral end portions 27f and 27c are processed to form corrugated uneven portions 23. As shown in FIG. The flow that has passed through the end with this corrugated uneven part 23 forms a shear layer along the main stream due to the influence of the main stream being shifted in the vertical direction, and depending on the shape, a longitudinal vortex (see Fig. 12) is induced. . When a shear layer is formed, the energy of the flow can be dissipated because the diffusion of the energy is facilitated by the viscosity. Moreover, longitudinal vortices diffuse due to the influence of viscosity on the downstream side of the mainstream, and eventually interfere with each other. As the vortices interfere with each other, the longitudinal vortices collapse into complex structures, consuming flow energy in a series of processes.

For this reason, by providing the corrugated concave and convex portions 23 at the end portions of the outer peripheral end portions 27f and 27c, it is possible to prevent the flow on the downstream side from the gap between the outer peripheral end portions 27f and 27c (outer peripheral side distances 30f and 30c). of energy is consumed, and agitation in the hot water storage tank 1 can be suppressed.

With the above configuration, it is possible to finely adjust the flow rate ratio of the flows flowing out from the remote region 10 and the adjacent region 11 while reducing the influence of manufacturing variations. can provide. In addition, by providing the corrugated uneven portions 23 at the end portions of the outer peripheral end portions 27f and 27c, the energy of the flow is consumed and the agitation in the hot water storage tank 1 can be further suppressed.

Regarding the shape of the uneven portion 23 formed at the end portions of the outer peripheral end portions 27f and 27c, even if the shape is not corrugated, the outer peripheral end portions 27f and 27c may have different lengths in the circumferential direction (e.g., V-shaped, etc.). ), the effect is obtained. Further, the shape of the uneven portion 23 formed at the end portions of the outer peripheral end portions 27f and 27c may be periodic or non-periodic.

A fourth embodiment of the thermal storage hot water supply apparatus of the present invention will be described with reference to FIGS. 13 and 14. FIG.
In this embodiment shown in the figure, a plurality of surface cut-and-raised portions 25a and outer peripheral cut-and-raised portions 25b are provided instead of the uneven portions 23 formed at the end portions of the outer peripheral end portions 27f and 27c of Example 3. . In the following, the differences from the third embodiment will be mainly described.
FIG. 13 shows a perspective view of the baffle plate 20D of this embodiment.
As shown in the figure, in this embodiment, a plurality of (two in this embodiment) surface communicating portions 24a penetrating the collision portion 26 of the baffle plate 20D are formed at the outer peripheral edge of the baffle plate 20D. The portions 27f and 27c are provided with a plurality of (six in this embodiment) outer peripheral communication portions 24b penetrating through the outer peripheral end portions 27f and 27c, respectively. That is, the communicating portion provided on the same surface as the collision portion 26 is referred to as a surface communicating portion 24a, and the communicating portion provided on the same surface as the outer peripheral end portions 27f and 27c is referred to as an outer peripheral communicating portion 24b.

In addition, the surface communicating portion 24a is provided with a structure (surface cut-and-raised 25a) in which cuts are made in the plate-shaped material before processing on the collision portion 26 side and in the direction perpendicular to it, and cut and raised on the water supply port 4 side. The outer peripheral communication portion 24b is provided with a structure (peripheral cut-and-raised portion 25b) in which cuts are made in the plate-like material on the collision portion 26 side and in the direction perpendicular thereto, and cut and raised on the water supply port 4 side.
The action and effect of the structure of this embodiment will be described with reference to FIGS. 13 and 14. FIG. In this embodiment, since the outer peripheral communicating portion 24b and the surface communicating portion 24a have different effects, the surface communicating portion 24a will be described first.
As shown in FIGS. 13 and 14, the flow reaching the collision portion 26 flows toward the entire circumference of the wall surface of the baffle plate 20D. At this time, an upward flow and a downward flow of the baffle plate 20D are generated by the surface cut-and-raised portion 25a connected to the surface communicating portion 24a. A part of this flow escapes upward from the surface of the baffle plate 20D via the surface communicating portion 24a, and the gap between the outer peripheral end portions 27f and 27c and the lower inclined region 9a of the tank bottom 2 (outer peripheral side distance 30f , and 30c), the energy for stirring can be suppressed by reducing the flow rate and the flow velocity.
In addition, although it is conceivable that agitation may occur due to the flow passing through the upper side of the baffle plate 20D, the effect can be minimized by reducing the area of the surface communicating portion 24a. 4 side and further between the cut portion 22 adjacent to the strut 21 and the impact portion 26, flow passing through the cut portion 22 can be blocked. This reduces the high velocity regions that occur as the flow passes through the cut 22 .
Next, the effect of the outer peripheral communicating portion 24b will be described with reference to FIG.
As shown in FIG. 14, the flow reaching the collision portion 26 flows along the wall surface of the baffle plate 20D and then changes direction near the outer peripheral ends 27f and 27c. After that, the outer peripheral cut-and-raised portion 25b divides the flow into the flow passing through the outer peripheral end portions 27f and 27c and the flow passing through the gaps between the tank bottom 2 and the outer peripheral end portions 27f and 27c (outer peripheral side distances 30f and 30c). As a result, the flow rate of the flow passing through the gaps between the tank bottom 2 and the outer peripheral ends 27f and 27c (the outer peripheral distances 30f and 30c) can be reduced, and the stirring energy can be suppressed.

As described above, the flow that collides with the baffle plate 20D flows not only through the gaps between the outer peripheral edge portions 27f and 27c and the tank bottom portion 2 (the outer peripheral side distances 30f and 30c), but also through the upper portion of the baffle plate 20D and the outer peripheral edge portions 27f and 27c. By letting the water flow out from the hot water storage tank 1, the area through which the flow passes can be increased, and as a result, the flow velocity flowing out into the hot water storage tank 1 can be reduced.

Various combinations of the surface cut-and-raised portion 25a and the outer peripheral cut-and-raised portion 25b can be selected according to the angle of the lower inclined region 9a and the flow rate conditions. For example, it is also possible to provide the outer peripheral communication portion 24b only at the outer peripheral end portion 27c of the proximity region 11 .

Embodiment 5 of the thermal storage hot water supply apparatus of the present invention will be described with reference to FIG.

In this embodiment shown in the figure, the baffle plate 20B described in the second embodiment is installed on the top portion 3 of the tank.
FIG. 15 shows an enlarged view of the tank top portion 3 in this embodiment.
As shown in the figure, the tank top 3 has a hot water outlet 8 and a hot water inlet 7, and the wall surface of the tank top 3 has a conical structure with the hot water outlet 8 at its apex. For this reason, the hot water inlet 7 is provided in the middle of the upper inclined region 9b of the tank top 3. As shown in FIG. The baffle plate 20B of this embodiment is installed facing the inflow connection portion 12 of the hot water inlet 7 .
As a result, a gap near the hot water outlet 8 of the hot water storage tank 1 (outer circumference side distance 30c) and a farther gap (outer circumference side distance 30f) are generated. As with the tank bottom 2 , the area closer to the outlet 8 is the adjacent area 11 , and the area farther is the remote area 10 . The distances between the outer peripheral ends 27 f and 27 c and the tank bottom 2 , that is, the outer peripheral side distances 30 f and 30 c are greater in the near region 11 than in the remote region 10 . Further, the angles formed by the extension lines of the outer peripheral ends 27f and 27c and the tank bottom 2 on the outer side of the baffle plate 20B, ie, the angles 29f and 29c on the outer peripheral side, are also larger in the proximal region 11 than in the remote region 10. FIG.

Next, the operation of this embodiment will be described. Due to the difference in water density, the hot water storage tank 1 maintains a temperature distribution of hot water at the top and cold water at the bottom. When a user uses hot water, hot water is taken out from the hot water outlet 8, so that the hot water outlet 8 should be at the highest position in order to use the heat amount stored in the hot water storage tank 1 as little as possible. Therefore, hot water can be used efficiently by installing the hot water outlet 8 at the top of the tank top portion 3 as in this embodiment.

When hot water is stored in the hot water storage tank 1, cold water is taken out from the tank bottom 2, boiled by the heat source device 101, and returned to the hot water storage tank 1 through the hot water inlet 7 as hot water. At this time, the flow flows downward from the top portion 3 of the tank, thereby generating a flow toward the bottom portion 2 of the tank. By blocking this flow with the baffle plate 20B, mixing of hot water and cold water is suppressed. In addition, since the structure of the second embodiment is used as the baffle plate 20B, the flow rate of the flow toward the adjacent region 11 is greater than that of the remote region 10, and the flow toward the bottom of the hot water storage tank 1 is suppressed on the remote region 10 side. be done.

By the above action, the temperature of the hot water in the tank top portion 3 is maintained at a high temperature, and the temperature required for filling the hot water and supplying the hot water can be maintained.

Examples 1-5 can be used in combination with each other. , 20B, 20C, 20D can be combined.

Moreover, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail to facilitate understanding of the present invention, and are not necessarily limited to those having all the described configurations. Also, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

REFERENCE SIGNS LIST 1 hot water storage tank 2 tank bottom 3 tank top 4 water supply port 5 drainage port 6 water supply port 7 hot water inlet 8 hot water outlet 9A dug portion 9a lower slope Area 9b Upper slope area 10 Remote area 11 Proximal area 12 Inflow connection part 20, 20A, 20B, 20C, 20D Baffle plate 21 Strut 22 Cutting part 23 Concavo-convex part , 24 Communicating portion 24a Surface communicating portion 24b Peripheral communicating portion 25a Surface cut-and-raised portion 25b Peripheral cut-and-raised portion 26 Collision portion 27f, 27c Peripheral end portion 28 Peripheral connection portion 29f , 29c... outer circumference side angle, 30f, 30c... outer circumference side distance, 100... heat pump cycle, 101... heat source equipment, 102... compressor, 103... water-refrigerant heat exchanger, 104... expansion valve, 105... evaporator, 106: Propeller fan 107 Water pump 108 Water pipe 109 Hot water supply port 110 Drain valve 111 Pressure reducing valve.

Claims (15)

Consisting of a tank and a heat source device connected to the tank, the bottom of the tank and the inflow side of the heat source device are connected, and the top of the tank and the outflow side of the heat source device are connected,
The tank has a water supply port for inflowing water at its bottom and a water outlet for outflowing water, and a hot water inlet for inflowing hot water and a hot water outlet for outflowing hot water at its top,
and a lower sloping region rising outward from the water discharge port and/or an upper sloping region falling outward from the tap outlet, and the water supply port is arranged in the lower sloping region. and/or the hot water inlet is located in the upper sloped region,
A heat storage type in which a baffle plate is installed in the lower inclined area facing the inflow direction of water from the water supply port and/or the upper inclined area facing the inflow direction of hot water from the hot water inlet. A water heater,
The baffle plate has an outer peripheral end portion whose end protrudes toward the bottom wall surface and/or the top wall surface of the tank, and an extension line of the outer peripheral end portion of the baffle plate and the bottom wall surface and/or the tank bottom wall surface. Alternatively, the outer angle of the baffle plate formed with the top wall surface is defined as the outer peripheral angle, and the side of the baffle plate closer to the drain port or the hot water outlet is the adjacent area, and the side farther from the drain port or the hot water outlet is A regenerative hot water supply apparatus, wherein the angle of the outer peripheral side of the near area is larger than the angle of the outer peripheral side of the remote area when the remote area is taken as the remote area. The thermal storage hot water supply device according to claim 1,
When the distance between the outer peripheral edge of the remote area of the baffle plate and the outer peripheral edge of the adjacent area of the baffle plate and the bottom wall surface of the tank is defined as the outer peripheral distance, the distance is greater than the outer peripheral distance of the remote area. A regenerative hot water supply apparatus, wherein the adjacent area is configured to have a large outer peripheral distance. The thermal storage hot water supply device according to claim 1 or 2,
A regenerative hot water supply apparatus, wherein the baffle plate is arranged on an extension line of an inflow direction of water flowing through the water supply port and in parallel with the lower inclined region. The thermal storage hot water supply apparatus according to any one of claims 1 to 3,
The baffle plate and the wall surface of the lower inclined region of the bottom of the tank are connected by a support, and the support constitutes the same surface as the collision part of the baffle plate with which the water flow from the water supply direction of the water supply port collides. and a wall surface of the lower inclined region of the bottom of the tank are connected to each other. The thermal storage hot water supply device according to claim 1 or 2,
The baffle plate is characterized in that a flat plate portion of a collision portion with which a water flow from the water supply direction of the water supply port collides is arranged perpendicular to the water supply direction and non-parallel to the lower inclined region. A heat storage type water heater. The thermal storage hot water supply device according to claim 1 or 2,
A heat storage characterized in that the outer peripheral distance of the remote region and the outer peripheral distance of the adjacent region of the baffle plate are longer than the vertical length of the outer peripheral end of the baffle plate. water heater. The thermal storage hot water supply device according to claim 1 or 2,
The baffle plate and the wall surface of the lower inclined region of the bottom of the tank are connected by a support, and the support and the baffle plate are integrally structured, and the support and the baffle plate are in the outer peripheral end portion. A regenerative hot water supply device, wherein a cut portion is formed between the two. The thermal storage hot water supply apparatus according to any one of claims 5 to 7,
A regenerative hot water supply apparatus, wherein the outer peripheral side angle of the near region of the baffle plate is 90 degrees or more, and the outer peripheral side angle of the remote region of the baffle plate is 90 degrees or less. The thermal storage hot water supply device according to claim 1 or 2,
A carved portion having a horizontal bottom surface is provided in the lower inclined region of the bottom of the tank, and the bottom diameter of the carved portion is configured to be smaller than the diameter of the outer peripheral end portion of the baffle plate. Characteristic heat storage type water heater. The thermal storage hot water supply device according to claim 1 or 2,
A regenerative hot water supply apparatus, wherein the vertical length of the outer peripheral end portion of the baffle plate in the adjacent region is longer than the vertical length of the outer peripheral end portion of the remote region. The thermal storage hot water supply device according to claim 1 or 2,
A regenerative hot-water supply apparatus, wherein an uneven portion is formed at the end of the outer peripheral edge of the proximal region and/or the remote region of the baffle plate. The thermal storage hot water supply device according to claim 1 or 2,
A plurality of surface communicating portions penetrating through the colliding portion of the baffle plate and a plurality of outer peripheral communicating portions penetrating the outer peripheral end portion of the baffle plate are provided respectively,
In the surface communication portion, cuts are made in the plate-shaped material before processing on the collision portion side and in the direction perpendicular to it, and the surface is cut and raised on the water supply port side. 2. A regenerative hot water supply apparatus, characterized in that a plate-like material is cut in the collision part side and in a direction perpendicular thereto, and an outer peripheral cut and raised part is provided in the water inlet side. Consisting of a tank and a heat source device connected to the tank, the bottom of the tank and the inflow side of the heat source device are connected, and the top of the tank and the outflow side of the heat source device are connected,
The tank has a water supply port for inflowing water at its bottom and a water outlet for outflowing water, and a hot water inlet for inflowing hot water and a hot water outlet for outflowing hot water at its top,
and a lower sloping region rising outward from the water discharge port and/or an upper sloping region falling outward from the tap outlet, and the water supply port is arranged in the lower sloping region. and/or the hot water inlet is located in the upper sloped region,
A heat storage type in which a baffle plate is installed in the lower inclined area facing the inflow direction of water from the water supply port and/or the upper inclined area facing the inflow direction of hot water from the hot water inlet. A water heater,
The baffle plate has an outer peripheral end portion whose end protrudes toward the bottom wall surface and/or the top wall surface of the tank, and the side of the baffle plate near the drain port or the hot water outlet is a proximal region, the The distance between the outer peripheral end of the remote region of the baffle plate and the outer peripheral end of the adjacent region of the baffle plate and the bottom wall surface of the tank is defined as the outer peripheral distance. The heat storage hot water supply apparatus is characterized in that the outer distance of the near area is sometimes larger than the outer distance of the remote area. Consisting of a tank and a heat source device connected to the tank, the bottom of the tank and the inflow side of the heat source device are connected, and the top of the tank and the outflow side of the heat source device are connected,
The tank has a water supply port for inflowing water at its bottom and a water outlet for outflowing water, and a hot water inlet for inflowing hot water and a hot water outlet for outflowing hot water at its top,
and a lower sloping region rising outward from the water discharge port and/or an upper sloping region falling outward from the tap outlet, and the water supply port is arranged in the lower sloping region. and/or the hot water inlet is located in the upper sloping area, wherein
The bottom wall surface of the tank and/or the bottom sloping region of the tank facing the inflow direction of the water inlet and/or the upper sloping region facing the hot water inflow direction of the hot water inlet. Alternatively, a regenerative hot water supply apparatus is provided with a baffle plate having an outer peripheral end projecting toward the top wall surface of the tank. A heat source device comprising at least compression means for compressing a refrigerant, heating means for heating water fed with the refrigerant compressed by the compression means, expansion means for expanding the refrigerant, and evaporating means for heating the refrigerant, and heat storage. A hot water storage tank is connected to a tank of a hot water heater, and an annular passage is formed by annularly connecting the compression means, the heating means, the expansion means, and the evaporation means, and the refrigerant is sealed in the annular passage. A type heat pump water heater,
15. A hot water storage type heat pump water heater, characterized in that said heat storage type hot water supply device is the heat storage type hot water supply device according to any one of claims 1 to 14.

Images