JP7702300B2 - Heat storage type hot water supply device and heat pump type hot water supply device - Google Patents

Description

The present invention relates to a heat storage type hot water supply device and a storage type heat pump hot water supply device, and in particular to a heat storage type hot water supply device and a storage type heat pump hot water supply device that are suitable for those equipped with a baffle plate that suppresses agitation of water or hot water that flows into the tank.

One technology to reduce energy consumption related to hot water supply is to store the amount of hot water to be used in a hot water storage tank before use. To obtain hot water on demand, a large amount of heat is generally required, which requires larger equipment and the use of energy sources with high energy density.
In contrast, with a method of storing heat before use, it is only necessary to secure the amount of hot water needed in a day over a 24-hour period, for example, making it possible to use a system that utilizes small equipment or a heat source with a low energy density.
A known method of storing heat in hot water in a hot water storage tank is to store tap water in the hot water storage tank in advance, heat the water using a heat source device, and store the heat in the hot water storage tank.
With this method, temperature stratification is formed, with the lower part of the hot water storage tank being a cold water area and the upper part being a hot water area. Although hot and cold water are mixed in the hot water storage tank, convection is difficult to occur due to the difference in density, and this has the advantage that temperature uniformity is suppressed.
Therefore, in order to operate the above system, a technology is required that prevents convection as much as possible when supplying water to the bottom of the hot water storage tank or when returning hot water to the top of the hot water storage tank.
An example of a prior art document related to such a technology is Patent Document 1. Patent Document 1 describes a technology in which a baffle plate with a surface perpendicular to the water inlet direction is provided on the water inlet side below the vertical central axis of a hot water storage tank, and a border is formed on the outer periphery of the baffle plate to suppress mixing of temperature stratification caused by water supply.

Japanese Patent Application Publication No. 8-327147

According to the above-mentioned Patent Document 1, water that enters the bottom of the hot water storage tank collides with a 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 of the hot water storage tank, creating a flow field that flows around the entire inside of the hot water storage tank.
This reduces the maximum flow velocity compared to the flow at the water supply port, reducing the kinetic energy of the flow and suppressing agitation within the hot water storage tank.

Among the various types of hot water tanks, some are equipped with a drain outlet on the bottom for cleaning the inside of the tank or for use in emergencies.

In this type of hot water storage tank, the drain outlet on the bottom of the tank is located at the lowest point inside the tank, in order to drain the water from the tank without adding energy such as a pump.

As a result, there is a section on the bottom of the hot water storage tank that slopes toward the drain outlet on the bottom of the hot water storage tank, and the water supply inlet that supplies tap water is located on the slope.

When the baffle plate described in Patent Document 1 is provided in a position facing the water supply direction of the water supply port located on the inclined portion of the bottom of such a hot water storage tank, the baffle plate is installed perpendicular to the water supply direction, so that the flow of water flowing out from the gap between the outer edge of the baffle plate and the bottom of the hot water storage tank will have a flow that goes up the slope of the inclined portion of the bottom of the hot water storage tank and a flow that goes down the slope.

However, in this case, the flow of water going up the slope of the inclined portion of the bottom of the hot water storage tank may cause agitation at the top of the hot water storage tank, and there is a risk that agitation within the hot water storage tank may not be sufficiently suppressed.

In addition, the top of the hot water storage tank is designed so that the outlet located at the top of the tank is located at the highest position within the tank in order to drain the hot water from the tank.

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

When the baffle plate described in Patent Document 1 is provided in a position opposite the inflow direction of the hot water inlet located on the inclined portion of the top of such a hot water storage tank, the baffle plate is installed perpendicular to the inflow direction of the hot water, so that the flow of hot water flowing out from the gap between the outer edge of the baffle plate and the top of the hot water storage tank will have a flow that flows down the slope of the inclined portion of the top of the hot water storage tank and a flow that flows up the slope.

However, in this case, the flow of hot water down the slope of the inclined portion at the top of the hot water storage tank may cause agitation at the bottom of the hot water storage tank, and there is a risk that agitation within the hot water storage tank may not be sufficiently suppressed.
The present invention has been developed in consideration of the above-mentioned points, and its object is to provide a heat storage type hot water supply device and a storage type heat pump hot water supply device that can suppress agitation of the fluid (water, hot water) in the tank even when a baffle plate is installed on the inclined portion of the tank.

In order to achieve the above object, the heat storage type hot water supply device of the present invention comprises a tank and a heat source unit connected to the tank, the bottom of the tank is connected to the inlet side of the heat source unit, and the top of the tank is connected to the outlet side of the heat source unit,
The tank is provided at its bottom with a water inlet for introducing water and a water outlet for discharging water, and at its top with a hot water inlet for introducing hot water and a hot water outlet for discharging hot water,
The water supply port is disposed in the lower inclined region and the hot water inlet is disposed in the upper inclined region.
A heat storage hot water supply device in which a baffle plate is installed in the lower inclined region at a position opposite to the inflow direction of water from the water supply port and/or the upper inclined region at a position opposite to the inflow direction of hot water from the hot water inlet,
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 an outer peripheral angle is defined as an angle on the outside of the baffle plate formed between an extension line of the outer peripheral end portion of the baffle plate and the bottom wall surface and/or the top wall surface of the tank, and when a side of the baffle plate closer to the drain outlet or the tap outlet is defined as a near region and a side of the baffle plate farther from the drain outlet or the tap outlet is defined as a remote region, the outer peripheral angle of the near region is larger than the outer peripheral angle of the remote region,
The baffle plate is disposed on an extension of the inflow direction of water flowing through the water supply port and parallel to the lower inclined region.

In order to achieve the above object, the hot water storage type heat pump water heater of the present invention is characterized in that a heat source machine having at least a compression means for compressing a refrigerant, a heating means for heating water delivered with the refrigerant compressed by the compression means, an expansion means for expanding the refrigerant, and an evaporation means for heating the refrigerant is connected to a hot water storage tank of a heat storage type hot water heater, an annular flow path is formed that connects the compression means, the heating means, the expansion means, and the evaporation means in a ring shape, and the refrigerant is sealed in the annular flow path, and the heat storage type hot water heater is a heat storage type hot water heater having the above configuration.

According to the present invention, even if a baffle plate is installed on the inclined portion of the tank, it is possible to suppress agitation of the fluid (water, hot water) inside the tank.

1 is a system schematic diagram showing a CO2 heat pump water heater in which the heat storage type hot water heater of the present invention is adopted. FIG. 2 is an enlarged view of the vicinity of the bottom of the tank, showing the first embodiment of the heat storage hot water supply device of the present invention. FIG. 2 is a perspective view of a baffle plate used in the first embodiment of the heat storage hot water supply device of the present invention. FIG. 1 is an enlarged view of the vicinity of the tank bottom, showing a conventional heat storage hot water supply device. 1 is an enlarged view of the vicinity of the bottom of the tank, showing the state of flow of cold water in a heat storage hot water supply device of a conventional structure. FIG. 2 is an enlarged view of the vicinity of the bottom of the tank, showing the state of flow of cold water in the heat storage type hot water supply device according to the first embodiment of the present invention. FIG. 6 is an enlarged view of the vicinity of the bottom of the tank, showing a heat storage type hot water supply device according to a second embodiment of the present invention. FIG. 11 is a perspective view of a baffle plate used in a heat storage type hot water supply device according to a second embodiment of the present invention. FIG. 11 is an enlarged view of the vicinity of the bottom of the tank, showing the state of flow of cold water in the heat storage type hot water supply device according to the second embodiment of the present invention. FIG. 11 is an enlarged view of the vicinity of the bottom of the tank, showing a heat storage type hot water supply device according to a third embodiment of the present invention. FIG. 11 is a perspective view of a baffle plate used in a heat storage type hot water supply device according to a third embodiment of the present invention. FIG. 11 is an enlarged view of the vicinity of the bottom of the tank, showing the state of flow of cold water in a heat storage type hot water supply device according to a third embodiment of the present invention. FIG. 11 is a perspective view of a baffle plate used in a heat storage type hot water supply device according to a fourth embodiment of the present invention. FIG. 10 is an enlarged view of the vicinity of the bottom of the tank, showing the state of flow of cold water in a heat storage type hot water supply device according to a fourth embodiment of the present invention. FIG. 10 is an enlarged view of the vicinity of the tank top, showing a heat storage type hot water supply device according to a fifth embodiment of the present invention.

The thermal storage type hot water supply device and the hot water storage type heat pump hot water supply device of the present invention will be described below based on the illustrated embodiment. Note that the same reference numerals are used for the same components in each drawing.

Figure 1 shows a system schematic diagram of a CO2 heat pump water heater (storage type heat pump water heater) in which the heat storage type water heater of the present invention is used.

As shown in FIG. 1, the CO2 heat pump water heater is roughly composed of a heat source unit 101 equipped with a compressor 102 as a compression means, a water-refrigerant heat exchanger 103 as a heating means, an expansion valve 104 as an expansion means, an evaporator 105 as an evaporation means, and a propeller fan 106, and a hot water storage tank 1.

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

The evaporator 105 is composed of fins and heat transfer tubes, with the heat transfer tubes penetrating the stacked fins, allowing air to circulate between the heat transfer tubes, and a propeller fan 106 is installed as a means for circulating this air.

The hot water tank 1 is a hollow structure made of cylindrically shaped sheet metal covered on the top and bottom with conical sheet metal, which is then covered with insulating material and placed inside a box-shaped structure (in the following explanation, the lid on the top of the hot water tank 1 is called the tank top 3, and the lid on the bottom of the hot water tank 1 is called the tank bottom 2). The tank bottom 2 has two holes that penetrate the sheet metal, and a drain outlet 5 (see Figure 2) is provided at the apex of the conical structure (which is also the vertical central axis P of the hot water tank 1) and a water supply port 4 (see Figure 2) is provided halfway down the lower inclined region 9a.

The drain outlet 5 is connected to the outside of the hot water storage tank 1 via a drain valve 110, and opening the drain valve 110 opens the inside of the hot water storage tank 1 to the outside. The water supply inlet 4 is connected to a water pipe 108 via a pressure reducing valve 111, and is also connected to the water-refrigerant heat exchanger 103 of the heat source unit 101. A water supply pump 107 is installed between the water supply inlet 4 and the water-refrigerant heat exchanger 103, and this water supply pump 107 can supply water stored in the hot water storage tank 1 to the water-refrigerant heat exchanger 103. Therefore, the water supply inlet 4 also plays the role of the water supply inlet 6 (see Figure 2) for the heat source unit 101.

On the other hand, as shown in FIG. 15, a hot water outlet 8 is provided at the apex of the cone structure (which is also the vertical center axis P of the hot water storage tank 1) at the tank top 3, and a hot water inlet 7 is provided halfway up the upper inclined region 9b. 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 following order: tank bottom 2, water pump 107, water-refrigerant heat exchanger 103, and tank top 3. The hot water outlet 8 is connected to a hot water supply port 109 by piping. A piping branching off from a water pipe 108 is connected between the hot water outlet 8 and the hot water supply port 109, making it possible to mix water and hot water.

In the water-refrigerant heat exchanger 103, the refrigerant and water flow paths are in contact with each other so that the refrigerant and water flow in opposing directions. However, it is not necessary for the flow paths to be completely counter-current, and it is acceptable for the flow paths to be perpendicular to each other in some places.

A baffle plate 20A is installed inside the hot water storage tank 1 near the tank bottom 2. This baffle plate 20A is an umbrella-shaped structure with edges, that is, a structure with outer peripheral ends 27f and 27c whose ends protrude toward the wall surface of the tank bottom 2, and is placed over the water supply port 4.

The first embodiment of the heat storage hot water supply device of the present invention will be explained using Figures 2, 3, and 6.

As shown in FIG. 2, the baffle plate 20A is installed in the middle of the lower inclined region 9a at a position away from the drainage port 5 of the tank bottom 2, and is arranged on the extension line of the inflow connection part 12 that also serves as the connection part for the water supply port 4 and the water supply port 6, i.e., on the extension line of the inflow direction of the water flowing through the water supply port 4, and parallel to the lower inclined region 9a.

The ceiling portion of the baffle plate 20A is called the collision portion 26 because the water flow from the water supply direction of the water supply port 4 collides with it. Furthermore, as described above, the baffle plate 20A has an umbrella-shaped structure with edges (outer peripheral ends 27f and 27c), and the outer peripheral ends (edges) 27f and 27c of the baffle plate 20A are positioned closer to the wall surface of the tank bottom 2 than the collision portion 26.

In addition, in this embodiment, the side of the outer peripheral ends 27f and 27c of the baffle plate 20A that is closer to the drain outlet 5 of the hot water storage tank 1 is the proximity region 11, and the side that is farther from the drain outlet 5 of the hot water storage tank 1 is the remote region 10. In other words, the upper side of the slope of the lower slope region 9a of the tank bottom 2 is the remote region 10, and the lower side of the slope of the lower slope region 9a is the proximity region 11.

In addition, in this embodiment, the angle between the outer peripheral end 27f and the wall surface of the tank bottom 2 at the outer peripheral end 27c, and the distance between the outer peripheral end 27f and the wall surface of the tank bottom 2 at the outer peripheral end 27c are different in the remote area 10 and the close area 11 described above.

Specifically, the outer angles (outer side angles 29f and 29c) 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 are set so that the outer peripheral angle 29c of the near region 11 is larger than the outer peripheral angle 29f of the remote region 10. In this embodiment, the outer peripheral angle 29f of the remote region 10 is a right angle.

In addition, the shortest distances (outer peripheral 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 barrel plate 20A and the wall surface of the tank bottom 2 are such that the outer peripheral distance 30c of the proximal region 11 is greater than the outer peripheral distance 30f of the remote region 10.

Figure 3 shows an oblique view of the baffle plate 20A in this embodiment.

As described above, in this embodiment, since the outer peripheral angles 29f and 29c are different in the remote region 10 and the proximal region 11 of the baffle plate 20A, the outer peripheral connection portion 28 is provided to connect the two so that the outer peripheral ends 27f and 27c are smoothly connected. In other words, since the outer peripheral angles 29f and 29c are different in the remote region 10 and the proximal region 11, the outer peripheral ends 27f and 27c are connected by the outer peripheral connection portion 28 so that there is no gap between them.

In this embodiment, the area of the outer peripheral connection portion 28 is smaller than the outer peripheral ends 27f and 27c corresponding to the near region 11 and the far region 10, but the area of the outer peripheral connection portion 28 may be larger than the outer peripheral ends 27f and 27c.

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. The support 21 serves to connect the flat plate portion that forms the same surface as the collision portion 26 of the baffle plate 20A and the wall surface of the lower inclined region 9a of the tank bottom 2, and is joined by welding.

To explain the difference between this embodiment and the prior art, Figure 4 shows an enlarged view of the tank bottom 2 with a prior art baffle plate 20 installed on the tank bottom 2.

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 the baffle plate 20A of this embodiment. Specifically, in the conventional technology shown in Fig. 4, the outer peripheral angles 29f and 29c of the remote region 10 and the proximal region 11 are both right angles, and in addition, the outer peripheral distances 30f and 30c of the remote region 10 and the proximal region 11 are equal to each other.
The operation and effect of this embodiment will be described. At the start of use, tap water is supplied to the hot water storage tank 1 from the water pipe 108, and the inside of the hot water storage tank 1 is filled with water. At this time, the water 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 heated during a time period set by the user. During the heating operation, the water pump 107 is operated, and cold water is supplied from the tank bottom 2 to the water-refrigerant heat exchanger 103. At the same time, power is applied to the compressor 102 to start compressing the refrigerant, and the CO2 refrigerant is passed through the water-refrigerant heat exchanger 103, the expansion valve 104, and the evaporator 105 in this order. After a certain time has passed since the compressor 102 started to operate, the refrigerant temperature after compression reaches a temperature according to the setting, and the refrigerant and cold water exchange heat with each other in the water-refrigerant heat exchanger 103, and the cold water is heated to hot water of 65°C to 90°C. The heated water is returned to the tank top 3 through the hot water inlet 7 at the tank top 3 .
The temperature of the refrigerant is reduced to room temperature by giving heat to the cold water in the water-refrigerant heat exchanger 103, and passes through the pressure reducing valve 111 to a temperature lower than the environmental temperature of the heat source unit 101. Then, in the evaporator 105, the low-temperature refrigerant exchanges heat with the airflow generated by the propeller fan 106, and after obtaining heat from the outside air, the refrigerant returns to the compressor 102 again.
As the above operation continues, hot water begins 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 becomes filled with hot water.
When hot water is to be used, the hot water is taken out from the hot water outlet 8 and sent to the hot water supply port 109. At this time, at the same time that the hot water is sent to the hot water supply port 109, tap water is supplied from the water supply port 4 installed in the tank bottom 2 of the hot water storage tank 1.
If the temperature of the stored hot water is higher than desired by the user, it is mixed with cold water flowing through a pipe branching off from the water pipe 108 and then delivered to the hot water outlet 109. When the hot water in the hot water storage tank 1 is used, pressure is applied from the water pipe 108, so hot water can be delivered to the hot water outlet 109 without the need for a power source such as a pump. However, in cases where the hot water outlet 109 is significantly higher than the hot water storage tank 1, a separate pressurizing pump can be used.

The water stored in the hot water tank 1 can be drained by opening the drain valve 110 as needed. Examples of use cases include washing away dirt accumulated in the hot water tank 1, or securing water for daily use in the event of a water outage due to a disaster. In these use cases, it is necessary to be able to drain all of the stored water. For this reason, in this embodiment, the drain outlet 5 is provided at the apex of the conical structure of the tank bottom 2.

If the tank bottom 2 is not conical, the intended effect can be achieved by providing the drain outlet 5 at the lowest position. Therefore, the drain outlet 5 does not necessarily have to be located on the central axis of the tank bottom 2.

As mentioned above, since the drain outlet 5 is installed at the apex of the cone structure, the inlet connection 12, which also serves as the connection for the water supply inlet 4 or the water supply inlet 6, must be installed in the lower inclined region 9a of the cone structure. The lower inclined region 9a here refers to the region configured to allow water to flow to the drain outlet 5, and can be rephrased as a non-apex portion that is higher than the drain outlet 5. In other words, it also includes a portion of the slope of the lower inclined region 9a that has been processed to make it flat.

Figure 5 shows the state of cold water flow when a conventional baffle plate 20 is installed at the tank bottom 2 during operation of the conventional technology to send hot water from the hot water storage tank 1 to the hot water outlet 109.

The cold water that flows in through the water pipe 108 flows into the hot water tank 1 from the water supply port 4, then reaches the collision part 26 of the baffle plate 20 and changes its flow direction. The flow of the cold water flows along the wall surface of the baffle plate 20 as shown by the arrows in Figure 5, and flows out into the hot water tank 1 from the gap between the outer periphery ends 27f and 27c and the tank bottom 2 (outer periphery distances 30f and 30c).

At this time, the angles (outer peripheral angles 29f and 29c) that the remote region 10 and the nearby region 11 make with the tank bottom 2 are both right angles, and the widths (distances) of the outer peripheral distances 30f and 30c are also the same. Therefore, the flows that reach the remote region 10 and the nearby region 11 pass through the outer peripheral distances 30f and 30c at the same flow rate and flow velocity.

In addition, because the flow collides perpendicularly with the wall surface of the lower inclined region 9a of the tank bottom 2, the flow receives a reaction force from the tank bottom 2, and forms a flow that spreads along the wall surface of the tank bottom 2 while having a directional component that moves away from the wall surface of the tank bottom 2.

When this type of flow occurs, in area A (remote area 10) shown in Figure 5, a high-velocity flow with a directional component that reflects off the wall surface of the tank bottom 2 is generated, and this flow mixes the hot water at the tank top 3 and the cold water at the tank bottom 2. The mixing of hot water and cold water increases the amount of hot water below about 40°C, which cannot be used for filling the bath or supplying hot water. Since this hot water below about 40°C cannot be used for bathing or supplying hot water, it is necessary to raise the temperature again, for example by boiling it with the heat source unit 101. However, when reheating hot water, the coefficient of performance of the heat pump cycle 100 decreases.

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

In contrast, Figure 6 shows the flow state at the tank bottom 2 when this embodiment is used.

As shown in FIG. 6, in this embodiment, the outer circumferential angle 29c and the outer circumferential distance 30c of the near region 11 are configured to be larger than the outer circumferential angle 29f and the outer circumferential distance 30f of the far region 10.

When cold water flows into the structure of this embodiment from the water supply port 4, in the remote area 10, the flow that passes through the wall of the baffle plate 20A turns toward the tank bottom 2 and collides almost perpendicularly with the wall of the tank bottom 2. At this time, the flow direction changes suddenly, creating a stagnation area at the tank bottom 2 and increasing the static pressure.

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

As a result, the static pressure at the collision surface of the flow is reduced in the near region 11 compared to the remote region 10, and the flow rate can be increased. In addition, since the outer circumferential distance 30c in the near region 11 is greater than the outer circumferential distance 30f in the remote region 10, the flow rate increases when the same flow rate is achieved.

These two effects increase the flow rate and flow velocity in the near area 11 and reduce the flow rate and flow velocity on the remote area 10 side, thereby suppressing the stirring caused by the upward flow flowing out from the remote area 10 side that occurs when using conventional technology.

In this embodiment, the water inlet 4 and the water outlet 6 share a common flow path, but the water inlet 6 and the water outlet 5 may share a common flow path, and the water inlet 4 and the water outlet 6 may be located in different areas of the lower inclined area 9a.

Second Embodiment A thermal storage hot water supply device according to a second embodiment of the present invention will be described with reference to Figs.
The present embodiment shown in the drawing has a different shape of the baffle plate compared to embodiment 1. The following description will focus on the differences from embodiment 1.
FIG. 7 shows an enlarged view of the tank bottom 2 in this embodiment.
As shown in Figure 7, the baffle plate 20B of this embodiment has a basic structure in which the outer periphery of a flat plate is bent at a right angle, and the flat plate portion that becomes the collision portion 26 is perpendicular to the water supply direction (upward in Figure 7) and is disposed midway along the wall surface of the lower inclined region 9a of the tank bottom 2, non-parallel to the wall surface of the lower inclined region 9a. Therefore, the end of the support 21 has a joint surface at the same angle as the inclination of the lower inclined region 9a.

Comparing the remote region 10 and the near region 11 of the baffle plate 20B in this embodiment, with respect to the outer circumferential angles 29f and 29c of the remote region 10 and the near region 11, the outer circumferential angle 29c of the near region 11 is 90 degrees or more, and the outer circumferential angle 29f of the remote region 10 is 90 degrees or less. In addition, with respect to the outer circumferential distances 30f and 30c of the remote region 10 and the near region 11, the outer circumferential distance 30c of the near region 11 is configured to be greater than the outer circumferential distance 30f of the remote region 10.

Furthermore, in this embodiment, the outer peripheral distances 30f and 30c in the near region 11 and the far region 10 are larger than the vertical length of the collision portion 26 and the outer peripheral ends 27f and 27c. In other words, the gap (outer peripheral distances 30f and 30c) between the edge of the baffle plate 20B (outer peripheral ends 27f and 27c) and the wall surface of the tank bottom 2 is larger than the vertical height (length) of the edge of the baffle plate 20B (outer peripheral ends 27f and 27c).

Figure 8 shows an oblique 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 in 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 integrally formed). However, an edgeless cut portion 22 is formed between the support 21 and the edge (the outer peripheral ends 27f and 27c).

The function and effect of the structure of this embodiment will be explained using Figure 9.

As shown by the arrows in Figure 9, the flow that flows in from the water supply port 4 reaches the collision area 26 of the baffle plate 20B, then flows along the wall surface of the baffle plate 20B and flows out from the gap (outer peripheral distances 30f and 30c) between the outer peripheral ends 27f and 27c and the tank bottom 2. At this time, since the outer peripheral angle 29f is smaller than 90 degrees in the remote region 10, part of the flow that collides with the tank bottom 2 is returned in the direction of the water supply port 4. On the other hand, since the outer peripheral angle 29c is larger than 90 degrees in the close region 11, the flow that passes through the wall surface of the baffle plate 20B is less likely to return in the direction of the water supply port 4.

In addition, since the outer circumferential distance 30c of the proximal region 11 is greater than the outer circumferential distance 30f of the remote region 10, the flow resistance of the proximal region 11 is reduced and the flow rate is increased.
Furthermore, if the outer peripheral distances 30f and 30c are small in both the remote region 10 and the proximal region 11, the flow path cross-sectional area of the gap through which the flow passes (the outer peripheral distances 30f and 30c) becomes small, so that even with the same flow rate, the flow velocity increases, and the energy of the flow that stirs the hot water storage tank 1 is increased.
In contrast, in the present embodiment, the vertical distance between the collision portion 26 and the outer peripheral ends 27f and 27c of the remote region 10 and the proximal region 11 is smaller than the outer peripheral distances 30f and 30c, so that the flow rate is less likely to increase, and stirring within the hot water storage tank 1 is further suppressed.
In addition, by moving the support pillars 21 closer to the outer peripheral ends 27f and 27c of the remote region 10 and the proximal region 11, the proportion of the area through which the flow spreading circumferentially from the collision section 26 can pass increases, so that the area formed by the outer peripheral ends 27f and 27c and the tank bottom 2 can be used more widely.As a result, even with the same flow rate, the flow velocity can be reduced, thereby suppressing stirring.

When manufacturing the baffle plate 20B in this embodiment, we envision a method of bending the outer periphery of the disk at a right angle.

If the entire circumference were connected, wrinkles could occur during bending, making production difficult. However, in this embodiment, cut portions 22 (see FIG. 8) are provided on parts of the outer peripheral ends 27f and 27c, improving workability during bending and making it possible to manufacture flexible end shapes according to requirements. Also, in this embodiment, the cut portions 22 are provided adjacent to the support pillars 21, which has the effect of offsetting the effect of the flow being more likely to flow out through the cut portions 22 and the effect of the support pillars 21 impeding the flow.

The above structure not only provides the same effect as in Example 1, but also further suppresses agitation within the hot water storage tank 1 compared to Example 1.

A heat storage type hot water supply device according to a third embodiment of the present invention will be described with reference to Figs.
In this embodiment shown in the drawing, a recessed portion 9A is provided in the lower inclined region 9a of the tank bottom 2, and the outer peripheral ends 27f and 27c of the baffle plate 20C are modified as compared to the second embodiment. The following mainly describes the differences from the second embodiment.
FIG. 10 shows an enlarged view of the tank bottom 2 in this embodiment.
10, in this embodiment, a dug portion 9A with a horizontal bottom surface is provided in the lower inclined region 9a of the tank bottom 2. By providing this 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. Moreover, the bottom diameter L1 of the dug portion 9A is configured to be smaller than the diameter L2 of the outer peripheral ends 27f and 27c of the baffle plate 20C.
Furthermore, for the baffle plate 20C, the vertical length of the outer peripheral end 27c in the near region 11 is longer than the vertical length of the outer peripheral end 27f in the far region 10.
As shown in FIG. 11, the baffle plate 20C of this embodiment has a corrugated uneven portion 23 formed on the entire circumference of the ends of the outer peripheral ends 27f and 27c excluding the support posts 21 and the cut portions 22.

The function and effect of the structure of this embodiment will be explained using Figure 12.

As described above, in this embodiment, a recessed portion 9A with a horizontal bottom surface is provided in the lower inclined region 9a of the tank bottom 2. By providing this recessed portion 9A, it becomes easier to join the water supply port 4 in the vertical direction, and the variation in the inflow angle caused by manufacturing errors, etc. can be reduced, making it easier to adjust the flow rate ratio of the flow flowing out from the gap between the outer peripheral ends 27f and 27c of the remote region 10 and the proximal region 11 (outer peripheral distances 30f and 30c).

In addition, since the bottom diameter L1 of the recessed portion 9A is smaller than the diameter L2 of the outer peripheral ends 27f and 27c of the baffle plate 20C, the flow that passes through the collision portion 26 and reaches the outer peripheral ends 27f and 27c is less likely to stagnate in the recessed portion 9A.
Furthermore, when the flow that has flowed in from the water supply port 4 passes through the collision section 26 and flows out from the outer peripheral ends 27f and 27c, since the lengths of the edges (outer peripheral ends 27f and 27c) are different between the remote region 10 and the proximal region 11, the flow that flows out through the proximal region 11 into the hot water storage tank 1 bends sharply in the region close to the tank bottom 2, compared to when the lengths of the edges (outer peripheral ends 27f and 27c) are the same. This increases the static pressure near the tank bottom 2, making it difficult for the flow to pass through, and reducing the flow rate.
Using this effect, it is possible to adjust the flow rate ratio of the flow passing through the gap (the outer peripheral distances 30f and 30c) between the remote region 10 and the proximal region 11. Therefore, it is possible to adjust the flow rate ratio to be suitable for the lower inclined region 9a having various angles.

In this embodiment, the outer peripheral ends 27f and 27c are machined to have corrugated unevenness 23. When the flow passes through the end with the corrugated unevenness 23, a shear layer is formed along the main stream due to the vertical shift of the main stream, and depending on the shape, vertical vortices (see Figure 12) may be induced. When a shear layer is formed, the diffusion of energy due to viscosity is promoted, so the energy of the flow can be consumed. Furthermore, the vertical vortices diffuse due to the influence of viscosity downstream of the main stream, and eventually interfere with each other. The interference of the vortices causes the vertical vortices to collapse into a complex structure, consuming the energy of the flow in a series of processes.

For this reason, by providing a wavy uneven portion 23 at the end of the outer peripheral ends 27f and 27c, the flow energy is consumed downstream after flowing out of the gap between the outer peripheral ends 27f and 27c (outer peripheral distances 30f and 30c), and stirring within the hot water storage tank 1 can be suppressed.

The above configuration reduces the effects of manufacturing variations while allowing fine adjustment of the flow rate ratio of the flows flowing out from the remote region 10 and the proximal region 11, providing a baffle plate 20C that is easy to adjust to the intended flow rate ratio. In addition, by providing a wave-shaped uneven portion 23 at the end of the outer peripheral ends 27f and 27c, the energy of the flow can be consumed, further suppressing agitation within the hot water storage tank 1.

The shape of the uneven portion 23 formed at the end of the outer peripheral end portions 27f and 27c does not have to be wavy, but as long as the lengths of the outer peripheral end portions 27f and 27c are different in the circumferential direction (for example, V-shaped), an effect can be obtained. In addition, the shape of the uneven portion 23 formed at the end of the outer peripheral end portions 27f and 27c may be periodic or non-periodic.

A fourth embodiment of the heat storage type hot water supply device of the present invention will be described with reference to Figs.
In this embodiment shown in the drawing, a plurality of surface cut-outs 25a and outer circumferential cut-outs 25b are provided instead of the uneven portion 23 formed at the end of the outer circumferential ends 27f and 27c of the embodiment 3. The following mainly describes the differences from the embodiment 3.
FIG. 13 is a perspective view of a baffle plate 20D of this embodiment.
As shown in the figure, in this embodiment, a plurality of (two in this embodiment) surface communicating parts 24a penetrating the collision part 26 of the baffle plate 20D are provided in the collision part 26, and a plurality of (six in this embodiment) outer periphery communicating parts 24b penetrating the outer periphery ends 27f and 27c of the baffle plate 20D are provided in the outer periphery ends 27f and 27c of the baffle plate 20D. That is, the communicating part provided on the same surface as the collision part 26 is called the surface communicating part 24a, and the communicating part provided on the same surface as the outer periphery ends 27f and 27c is called the outer periphery communicating part 24b.

In addition, the surface communicating portion 24a has a structure in which a cut is made in the plate-shaped material before processing on the side of the collision portion 26 and in a direction perpendicular to it, and then cut and raised toward the water supply port 4 (surface cut-out 25a), and the outer periphery communicating portion 24b has a structure in which a cut is made in the plate-shaped material on the side of the collision portion 26 and in a direction perpendicular to it, and then cut and raised toward the water supply port 4 (outer periphery cut-out 25b).
The operation and effect of the structure of this embodiment will be described with reference to Figures 13 and 14. In this embodiment, the outer peripheral communicating portion 24b and the surface communicating portion 24a have different effects, so the surface communicating portion 24a will be described first.
13 and 14, the flow that reaches the collision section 26 flows toward the entire circumference of the wall surface of the baffle plate 20D. At this time, the surface cut-outs 25a connected to the surface communication section 24a generate a flow toward the upper side and a flow toward the lower side of the baffle plate 20D. Part of this flow passes upward from the surface of the baffle plate 20D through the surface communication section 24a, thereby reducing the flow rate of the flow that flows out from the gaps (outer peripheral distances 30f and 30c) between the outer peripheral ends 27f and 27c and the lower inclined region 9a of the tank bottom 2, and the flow rate is reduced, thereby suppressing the energy of stirring.
It is assumed that the flow passing through the upper side of the baffle plate 20D may cause stirring, but by reducing the area of the surface communication portion 24a, the effect of this can be minimized, and in addition, by orienting the surface cut-out 25a toward the water supply port 4 and further providing it between the cut portion 22 adjacent to the support 21 and the collision portion 26, it is possible to prevent the flow from passing through the cut portion 22. This makes it possible to reduce the high-speed region that occurs when the flow passes through the cut portion 22.
Next, the effect of the outer circumferential communicating portion 24b will be described with reference to FIG.
14, the flow that reaches the collision section 26 flows along the wall surface of the baffle plate 20D, and then changes direction near the outer circumferential ends 27f and 27c. After this, the outer circumferential cut-and-raised portion 25b splits the flow into one that passes through the outer circumferential ends 27f and 27c, and one that passes through the gaps (outer circumferential distances 30f and 30c) between the tank bottom 2 and the outer circumferential ends 27f and 27c. This reduces the flow rate of the flow that passes through the gaps (outer circumferential distances 30f and 30c) between the tank bottom 2 and the outer circumferential ends 27f and 27c, and suppresses the stirring energy.

As described above, the flow that collides with the baffle plate 20D is directed to flow out not only through the gap between the outer peripheral ends 27f and 27c and the tank bottom 2 (outer peripheral distances 30f and 30c), but also from the top of the baffle plate 20D and the outer peripheral ends 27f and 27c, thereby increasing the area through which the flow passes, and as a result, the flow rate flowing into the hot water storage tank 1 can be reduced.

The surface cutout 25a and the outer periphery cutout 25b can be selected in various combinations according to the angle of the lower inclined region 9a and the flow conditions. For example, it is also possible to provide the outer periphery communication portion 24b only at the outer periphery end portion 27c of the adjacent region 11.

The fifth embodiment of the heat storage hot water supply device of the present invention will be described with reference to FIG. 15.

In this embodiment shown in the figure, the baffle plate 20B explained in the second embodiment is installed on the tank top 3.
FIG. 15 shows an enlarged view of the tank top 3 in this embodiment.
As shown in the figure, the tank top 3 is equipped with a tap outlet 8 and a hot water inlet 7, and the wall surface of the tank top 3 has a conical structure with the tap outlet 8 as the apex. For this reason, the hot water inlet 7 is provided midway in the upper inclined region 9b of the tank top 3. The baffle plate 20B of this embodiment is installed opposite the inflow connection portion 12 of the hot water inlet 7.
This results in a gap (outer peripheral distance 30c) close to the tap 8 of the hot water storage tank 1 and a gap (outer peripheral distance 30f) far from it. As with the tank bottom 2, the region closer to the tap 8 is the near region 11 and the region farther from it is the remote region 10. The distance between the outer peripheral ends 27f and 27c and the tank bottom 2, i.e., the outer peripheral distances 30f and 30c, is greater in the near region 11 than in the remote region 10. In addition, the outer angles of the baffle plate 20B formed by the extensions of the outer peripheral ends 27f and 27c and the tank bottom 2, i.e., the outer peripheral angles 29f and 29c, are also greater in the near region 11 than in the remote region 10.

Next, the operation of this embodiment will be explained. Due to differences in the density of the water, the temperature distribution inside the hot water storage tank 1 is maintained with hot water at the top and cold water at the bottom. When a user uses hot water, the hot water is taken out from the hot water outlet 8, so in order to make the most of the heat stored in the hot water storage tank 1, it is best for the hot water outlet 8 to be in the highest position. For this reason, by installing the hot water outlet 8 at the apex of the tank top 3, as in this embodiment, hot water can be used efficiently.

When storing hot water in the hot water storage tank 1, cold water is taken from the tank bottom 2, boiled by the heat source unit 101, and returned as hot water to the hot water storage tank 1 through the hot water inlet 7. At this time, a downward flow from the tank top 3 creates a flow toward the tank bottom 2. The baffle plate 20B blocks this flow, suppressing mixing of the hot water and cold water. In addition, because the structure of Example 2 is used for the baffle plate 20B, the flow rate toward the near area 11 is greater than that toward the remote area 10, and the downward flow of the hot water storage tank 1 on the remote area 10 side is suppressed.

As a result of the above, the water temperature at the top 3 of the tank is kept high, and the temperature required for filling the bath and supplying hot water can be maintained.

Note that Examples 1-5 can be used in combination with one another. For example, the same baffle plates 20A, 20B, 20C, and 20D can be used for the tank bottom 2 and the tank top 3, or different baffle plates 20A, 20B, 20C, and 20D can be combined.

The present invention is not limited to the above-described embodiments, but includes various modified examples. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those having all of the configurations described. It is also 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. It is also possible to add, delete, or replace part of the configuration of each embodiment with other configurations.

1...hot water storage tank, 2...tank bottom, 3...tank top, 4...water supply port, 5...drain port, 6...water supply port, 7...hot water inlet, 8...hot water outlet, 9A...recessed portion, 9a...lower inclined region, 9b...upper inclined region, 10...remote region, 11...proximal region, 12...inlet connection portion, 20, 20A, 20B, 20C, 20D...baffle plate, 21...support, 22...cut portion, 23...uneven portion, 24...connection portion, 24a...surface connection portion, 24b...periphery connection portion, 25a...surface cut-out, 25b...Outer periphery cut-and-raised, 26...Collision section, 27f, 27c...Outer periphery end, 28...Outer periphery connection section, 29f, 29c...Outer periphery angle, 30f, 30c...Outer periphery distance, 100...Heat pump cycle, 101...Heat source unit, 102...Compressor, 103...Water-refrigerant heat exchanger, 104...Expansion valve, 105...Evaporator, 106: Propeller fan, 107...Water pump, 108...Water pipe, 109...Hot water outlet, 110...Drain valve, 111...Pressure reducing valve.

Claims (15)

The system comprises a tank and a heat source unit connected to the tank, the bottom of the tank is connected to the inlet side of the heat source unit, and the top of the tank is connected to the outlet side of the heat source unit;
The tank is provided at its bottom with a water inlet for introducing water and a water outlet for discharging water, and at its top with a hot water inlet for introducing hot water and a hot water outlet for discharging hot water,
The device further includes a lower inclined region that rises outward from the drain outlet and an upper inclined region that falls outward from the hot water outlet, the water supply port being disposed in the lower inclined region and the hot water inlet being disposed in the upper inclined region,
A heat storage type hot water supply device in which a baffle plate is installed in the lower inclined region at a position opposite to the inflow direction of water from the water supply port and/or the upper inclined region at a position opposite to the inflow direction of hot water from the hot water inlet,
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 an outer peripheral angle is defined as an angle on the outside of the baffle plate formed between an extension line of the outer peripheral end portion of the baffle plate and the bottom wall surface and/or the top wall surface of the tank, and when a side of the baffle plate closer to the drain outlet or the tap outlet is defined as a near region and a side of the baffle plate farther from the drain outlet or the tap outlet is defined as a remote region, the outer peripheral angle of the near region is larger than the outer peripheral angle of the remote region,
The heat storage hot water supply device is characterized in that the baffle plate is disposed on an extension of the inflow direction of water flowing through the water supply port and parallel to the lower inclined area. The heat storage type hot water supply device according to claim 1,
A heat storage type hot water supply device characterized in that, when the distance between the outer peripheral end of the remote region of the baffle plate and the outer peripheral end of the nearby region and the bottom wall surface of the tank is defined as the outer peripheral distance, the outer peripheral distance of the nearby region is larger than the outer peripheral distance of the remote region. The heat storage type hot water supply device according to claim 1 or 2,
A heat storage type hot water supply device characterized in that 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 connects a flat plate portion that forms the same plane as the collision portion of the baffle plate where the water flow from the water supply direction of the water supply inlet collides, and the wall surface of the lower inclined region of the bottom of the tank. The system comprises a tank and a heat source unit connected to the tank, the bottom of the tank is connected to the inlet side of the heat source unit, and the top of the tank is connected to the outlet side of the heat source unit;
The tank is provided at its bottom with a water inlet for introducing water and a water outlet for discharging water, and at its top with a hot water inlet for introducing hot water and a hot water outlet for discharging hot water,
The device further includes a lower inclined region that rises outward from the drain outlet and an upper inclined region that falls outward from the hot water outlet, the water supply port being disposed in the lower inclined region and the hot water inlet being disposed in the upper inclined region,
A heat storage type hot water supply device in which a baffle plate is installed in the lower inclined region at a position opposite to the inflow direction of water from the water supply port and/or the upper inclined region at a position opposite to the inflow direction of hot water from the hot water inlet,
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 an outer peripheral angle is defined as an angle on the outside of the baffle plate formed between an extension line of the outer peripheral end portion of the baffle plate and the bottom wall surface and/or the top wall surface of the tank, and when a side of the baffle plate closer to the drain outlet or the tap outlet is defined as a near region and a side of the baffle plate farther from the drain outlet or the tap outlet is defined as a remote region, the outer peripheral angle of the near region is larger than the outer peripheral angle of the remote region,
A heat storage hot water supply device characterized in that the baffle plate and the wall surface of the lower inclined region of the bottom of the tank are connected by a support, the support and the baffle plate have an integral structure, and a cut portion is formed between the support and the outer peripheral end of the baffle plate. The heat storage type hot water supply device according to claim 4,
A heat storage type hot water supply device characterized in that, when the distance between the outer peripheral end of the remote region of the baffle plate and the outer peripheral end of the nearby region and the bottom wall surface of the tank is defined as the outer peripheral distance, the outer peripheral distance of the nearby region is larger than the outer peripheral distance of the remote region. The heat storage type hot water supply device according to claim 4 or 5,
A heat storage hot water supply device, characterized in that the outer peripheral angle of the near region of the baffle plate is 90 degrees or more, and the outer peripheral angle of the remote region of the baffle plate is 90 degrees or less. The system comprises a tank and a heat source unit connected to the tank, the bottom of the tank is connected to the inlet side of the heat source unit, and the top of the tank is connected to the outlet side of the heat source unit;
The tank is provided at its bottom with a water inlet for introducing water and a water outlet for discharging water, and at its top with a hot water inlet for introducing hot water and a hot water outlet for discharging hot water,
The device further includes a lower inclined region that rises outward from the drain outlet and an upper inclined region that falls outward from the hot water outlet, the water supply port being disposed in the lower inclined region and the hot water inlet being disposed in the upper inclined region,
A heat storage type hot water supply device in which a baffle plate is installed in the lower inclined region at a position opposite to the inflow direction of water from the water supply port and/or the upper inclined region at a position opposite to the inflow direction of hot water from the hot water inlet,
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 an outer peripheral angle is defined as an angle on the outside of the baffle plate formed between an extension line of the outer peripheral end portion of the baffle plate and the bottom wall surface and/or the top wall surface of the tank, and when a side of the baffle plate closer to the drain outlet or the tap outlet is defined as a near region and a side of the baffle plate farther from the drain outlet or the tap outlet is defined as a remote region, the outer peripheral angle of the near region is larger than the outer peripheral angle of the remote region,
A heat storage type hot water supply device characterized in that a recessed 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 recessed portion is smaller than the diameter of the outer peripheral end of the baffle plate. The heat storage type hot water supply device according to claim 7,
A heat storage type hot water supply device characterized in that, when the distance between the outer peripheral end of the remote region of the baffle plate and the outer peripheral end of the nearby region and the bottom wall surface of the tank is defined as the outer peripheral distance, the outer peripheral distance of the nearby region is larger than the outer peripheral distance of the remote region. The system comprises a tank and a heat source unit connected to the tank, the bottom of the tank is connected to the inlet side of the heat source unit, and the top of the tank is connected to the outlet side of the heat source unit;
The tank is provided at its bottom with a water inlet for introducing water and a water outlet for discharging water, and at its top with a hot water inlet for introducing hot water and a hot water outlet for discharging hot water,
and a lower inclined region rising outward from the drain outlet and/or an upper inclined region falling outward from the hot water outlet, the water supply port being disposed in the lower inclined region and/or the hot water inlet being disposed in the upper inclined region;
A heat storage hot water supply device in which a baffle plate is installed in the lower inclined region at a position opposite to the inflow direction of water from the water supply port and/or the upper inclined region at a position opposite to the inflow direction of hot water from the hot water inlet,
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 an outer peripheral angle is defined as an angle on the outside of the baffle plate formed between an extension line of the outer peripheral end portion of the baffle plate and the bottom wall surface and/or the top wall surface of the tank, and when a side of the baffle plate closer to the drain outlet or the tap outlet is defined as a near region and a side of the baffle plate farther from the drain outlet or the tap outlet is defined as a remote region, the outer peripheral angle of the near region is larger than the outer peripheral angle of the remote region,
2. A heat storage hot water supply device, comprising: a baffle plate having an outer circumferential edge portion in the proximal region, the outer circumferential edge portion having a vertical length longer than a vertical length of the outer circumferential edge portion in the remote region. The heat storage type hot water supply device according to claim 9,
A heat storage type hot water supply device characterized in that, when the distance between the outer peripheral end of the remote region of the baffle plate and the outer peripheral end of the nearby region and the bottom wall surface of the tank is defined as the outer peripheral distance, the outer peripheral distance of the nearby region is larger than the outer peripheral distance of the remote region. The system comprises a tank and a heat source unit connected to the tank, the bottom of the tank is connected to the inlet side of the heat source unit, and the top of the tank is connected to the outlet side of the heat source unit;
The tank is provided at its bottom with a water inlet for introducing water and a water outlet for discharging water, and at its top with a hot water inlet for introducing hot water and a hot water outlet for discharging hot water,
and a lower inclined region rising outward from the drain outlet and/or an upper inclined region falling outward from the hot water outlet, the water supply port being disposed in the lower inclined region and/or the hot water inlet being disposed in the upper inclined region;
A heat storage type hot water supply device in which a baffle plate is installed in the lower inclined region at a position opposite to the inflow direction of water from the water supply port and/or the upper inclined region at a position opposite to the inflow direction of hot water from the hot water inlet,
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 an outer peripheral angle is defined as an angle on the outside of the baffle plate formed between an extension line of the outer peripheral end portion of the baffle plate and the bottom wall surface and/or the top wall surface of the tank, and when a side of the baffle plate closer to the drain outlet or the tap outlet is defined as a near region and a side of the baffle plate farther from the drain outlet or the tap outlet is defined as a remote region, the outer peripheral angle of the near region is larger than the outer peripheral angle of the remote region,
A heat storage hot water supply device, characterized in that an uneven portion is formed at the end of the outer circumferential end of the near region and/or the remote region of the baffle plate. The heat storage hot water supply device according to claim 11,
A heat storage type hot water supply device characterized in that, when the distance between the outer peripheral end of the remote region of the baffle plate and the outer peripheral end of the nearby region and the bottom wall surface of the tank is defined as the outer peripheral distance, the outer peripheral distance of the nearby region is larger than the outer peripheral distance of the remote region. The system comprises a tank and a heat source unit connected to the tank, the bottom of the tank is connected to the inlet side of the heat source unit, and the top of the tank is connected to the outlet side of the heat source unit;
The tank is provided at its bottom with a water inlet for introducing water and a water outlet for discharging water, and at its top with a hot water inlet for introducing hot water and a hot water outlet for discharging hot water,
and a lower inclined region rising outward from the drain outlet and/or an upper inclined region falling outward from the hot water outlet, the water supply port being disposed in the lower inclined region and/or the hot water inlet being disposed in the upper inclined region;
A heat storage type hot water supply device in which a baffle plate is installed in the lower inclined region at a position opposite to the inflow direction of water from the water supply port and/or the upper inclined region at a position opposite to the inflow direction of hot water from the hot water inlet,
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 an outer peripheral angle is defined as an angle on the outside of the baffle plate formed between an extension line of the outer peripheral end portion of the baffle plate and the bottom wall surface and/or the top wall surface of the tank, and when a side of the baffle plate closer to the drain outlet or the tap outlet is defined as a near region and a side of the baffle plate farther from the drain outlet or the tap outlet is defined as a remote region, the outer peripheral angle of the near region is larger than the outer peripheral angle of the remote region,
A collision portion of the baffle plate is provided with a plurality of surface communicating portions penetrating the collision portion, and a peripheral end portion of the baffle plate is provided with a plurality of peripheral communicating portions penetrating the peripheral end portion,
This heat storage hot water supply device is characterized in that the surface communication portion has a surface cut-out formed by cutting a cut into the plate-shaped material before processing, the cut being made toward the collision portion and in a direction perpendicular to the collision portion, and the peripheral communication portion has a peripheral cut-out formed by cutting a cut into the plate-shaped material before processing, the cut being made toward the collision portion and in a direction perpendicular to the collision portion, and the peripheral communication portion has a peripheral cut-out formed by cutting into the plate-shaped material before processing, the cut being made toward the water supply port. The heat storage type hot water supply device according to claim 13,
A heat storage type hot water supply device characterized in that, when the distance between the outer peripheral end of the remote region of the baffle plate and the outer peripheral end of the nearby region and the bottom wall surface of the tank is defined as the outer peripheral distance, the outer peripheral distance of the nearby region is larger than the outer peripheral distance of the remote region. A storage-type heat pump hot water supply device, comprising: a heat source unit including at least a compression means for compressing a refrigerant, a heating means for heating water supplied with the refrigerant compressed by the compression means, an expansion means for expanding the refrigerant, and an evaporation means for heating the refrigerant; a tank of the storage-type hot water supply device connected to the heat source unit; an annular flow path that connects the compression means, the heating means, the expansion means, and the evaporation means in a ring shape; and the refrigerant is sealed in the annular flow path,
The heat storage type hot water supply device according to claim 1 , wherein the heat storage type hot water supply device is a heat storage type hot water supply device according to claim 1 .

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