JP7003205B2 - Water heater - Google Patents

Description

The present invention relates to a hot water supply device.

In recent years, interest in energy saving has increased, and hot water storage type heat pump water heaters with excellent energy saving properties have become widespread. In such a hot water supply device, hot water is supplied at a set temperature by mixing high-temperature water and low-temperature water discharged from a hot water storage tank. For this mixing, a mixing valve that mixes low-temperature water and high-temperature water in an appropriate ratio is used.

Generally, a mixing valve has a housing having two inlets for supplying hot water and cold water, and an outlet for discharging hot water in which hot water and cold water are mixed, and one or more openings. It is composed of a valve body having a. In such a mixing valve, when the valve body rotates, the flow path area formed by each water inlet and the opening of the valve body changes, whereby the mixing ratio of hot water and low temperature water is adjusted.

For example, the mixing valve of the hot water supply device disclosed in Patent Document 1 has two openings in the valve body, and when the valve body is driven from the water (low temperature water) side, the flow rate of only water fluctuates. After the variable region exists for a certain section, the mixed region where hot water (high temperature water) and water are mixed exists for a certain section.

Japanese Unexamined Patent Publication No. 2013-148313

In the mixing valve of the hot water supply device of Patent Document 1, it is possible to adjust the flow rate (outflow amount) in the variable flow rate region. However, this variable flow rate region is a region where only low temperature water is discharged. On the other hand, in the mixed region where the mixing ratio of the high temperature water and the low temperature water can be adjusted, the outflow amount of the hot water discharged is constant and cannot be adjusted. That is, although the mixing valve of the hot water supply device of Patent Document 1 has a configuration for adjusting the outflow amount of low-temperature water, it is a configuration for adjusting the outflow amount of hot water water in which high-temperature water and low-temperature water are mixed. Not prepared.

As described in Patent Document 1 as a prior art, in a general hot water supply device, the mixing valve adjusts only the mixing ratio of high temperature water and low temperature water, and the outflow rate of hot water is determined by the mixing valve. It is adjusted by the flow control valve. Therefore, the mixing valve used in a general hot water supply device also does not have a configuration for adjusting the outflow amount of hot water in which high temperature water and low temperature water are mixed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to adjust the outflow amount of hot water in which high temperature water and low temperature water are mixed by a mixing valve.

In order to achieve the above object, the water heater according to the present invention is
A hot water storage tank that stores hot water and
A plurality of mixing valves for mixing the low-temperature water and the high-temperature water supplied from the hot water storage tank,
Designated reception means and
Equipped with
Each of the plurality of mixing valves is connected to each of the plurality of hot water supply terminals to which hot water is to be supplied.
Each of the plurality of mixing valves
A housing having a first inlet for supplying the high-temperature water, a second inlet for supplying the low-temperature water, and an outlet for discharging hot water in which the high-temperature water and the low-temperature water are mixed. When,
A valve body driven to adjust the inflow amount of the high temperature water supplied from the first inlet and the low temperature water supplied from the second inlet.
Equipped with
The designated receiving means receives the designation of the hot water supply terminal to be prioritized among the plurality of hot water supply terminals, and receives the designation.
In the driving range of the valve body, the first mixing ratio adjusting section and the first mixing ratio adjustment section in which the mixing ratio of the high temperature water and the low temperature water changes while the fluctuation of the outflow amount of the hot water discharged from the outlet is suppressed. It has a mixture ratio adjustment section of 2 and has
The outflow amount of the hot water differs between the first mixing ratio adjusting section and the second mixing ratio adjusting section.
The valve body of the mixing valve corresponding to the hot water supply terminal designated by the designated receiving means is driven within the range of the first mixing ratio adjusting section at the time of hot water supply.
The valve body of the mixing valve corresponding to the hot water supply terminal other than the hot water supply terminal designated by the designated reception means is driven within the range of the second mixing ratio adjusting section at the time of hot water supply.

According to the present invention, the outflow amount of hot water in which high temperature water and low temperature water are mixed can be adjusted by the mixing valve.

It is a figure which shows the structure of the hot water supply device which concerns on embodiment of this invention. It is a block diagram which shows the hardware composition of a control device. It is a figure which shows the functional structure of a control device. It is a figure which shows the structure of the valve body of a mixing valve, (A) is the front view of the valve body, (B) is the development view of the hollow part of the valve body. It is a figure which shows the state of a mixing valve at the time of a large flow rate operation, (A) and (B) are a figure which shows the overlapping state of a water inlet and an opening, (C) is a figure which shows the state of the inside of a mixing valve. It is a figure. It is a figure which shows the state of a mixing valve at the time of a small flow rate operation, (A) and (B) are a figure which shows the overlapping state of a water inlet and an opening, (C) is a figure which shows the state of the inside of a mixing valve. It is a figure. It is a figure which shows the relationship (the 1) of the flow path area (ratio) with respect to the rotation position of the valve body of a mixing valve. It is a figure which shows the relationship (the 2) of the flow path area (ratio) with respect to the rotation position of the valve body of a mixing valve. It is a figure for demonstrating the correspondence relationship between the operation mode of a control device, and the opening degree of a mixing valve.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, "low temperature water" means tap water (city water), low temperature water supplied from a hot water storage tank, and the like. "High temperature water" means water having a higher temperature than low temperature water, and "hot water" means water in which high temperature water and low temperature water are mixed. However, strictly speaking, the "hot water" that is actually supplied includes the case of only high temperature water or low temperature water.

First, the configuration of the hot water supply device 100 according to the embodiment of the present invention will be described with reference to FIG. The hot water supply device 100 is a hot water storage type heat pump hot water supply device that supplies hot water at a temperature desired by the user to the hot water supply terminal. The hot water supply terminal is, for example, a faucet, a shower head, or the like installed in a kitchen, a bathroom, or the like. In the present embodiment, the hot water supply device 100 heats the low temperature water supplied from the water supply end 3 to supply hot water to the hot water supply terminal 110 which is the shower head of the bathroom and the hot water supply terminal 120 which is the bathtub of the bathroom. ..

The hot water supply device 100 includes a control device 2 that controls the operation of the entire hot water supply device 100, mixing valves 5 and 6 that mix hot water and low temperature water to discharge hot water, a hot water storage tank 7 that stores high temperature water, and hot water storage. A heat pump unit 8 for heating low-temperature water supplied via the tank 7 and a pump 9 for supplying low-temperature water from the hot water storage tank 7 to the heat pump unit 8 are provided. In the pipe indicated by the connecting line, low temperature water, high temperature water or hot water flows inside the pipe.

The control device 2 is communicably connected to an external terminal (that is, a hot water supply remote controller) (not shown), and controls the operation of each part of the hot water supply device 100 according to the content of the user operation received by the external terminal. Further, the control device 2 causes the external terminal to display the operating state, operation screen, etc. of the hot water supply device 100. The details of the control device 2 will be described later.

The mixing valve 5 mixes the high temperature water from the hot water storage tank 7 and the low temperature water from the water supply end 3, and supplies the mixed hot water to the hot water supply terminal 110.

The mixing valve 6 mixes the high temperature water from the hot water storage tank 7 and the low temperature water from the water supply end 3, and supplies the mixed hot water to the hot water supply terminal 120. The details of the mixing valves 5 and 6 will be described later.

The hot water storage tank 7 is made of a metal such as stainless steel or a resin. A heat insulating material (not shown) is arranged on the outside of the hot water storage tank 7. As a result, the high temperature water can be kept warm for a long time in the hot water storage tank 7.

In the hot water storage tank 7, a pipe to the water supply end 3 is connected at the lower part, and low temperature water is supplied from the lower part. Further, the hot water storage tank 7 is connected to the heat pump unit 8 by piping at the lower part via the pump 9, and is connected to the heat pump unit 8 by piping at the upper part.

As a result, the low-temperature water flowing out from the lower part of the hot water storage tank 7 becomes high-temperature water via the heat exchanger in the pump 9 and the heat pump unit 8, and is returned to the upper part of the hot water storage tank 7. A boiling circuit is constructed by such circulation.

Further, a pipe (hot water outlet pipe) to the mixing valves 5 and 6 is connected to the hot water storage tank 7 at the upper part. As a result, the high temperature water stored in the upper part of the hot water storage tank 7 is supplied to the mixing valves 5 and 6.

The heat pump unit 8 is a heat pump that uses, for example, CO2, HFC (hydrofluorocarbon), or the like as a refrigerant. The heat pump unit 8 includes a compressor, a first heat exchanger that exchanges heat between the refrigerant and water, an expansion valve, a second heat exchanger that exchanges heat between the outside air and the refrigerant, a blower, and a temperature. It consists of sensors, control boards, etc. The compressor, heat exchanger, expansion valve and second heat exchanger are connected in an annular shape to form a refrigerating cycle circuit (also referred to as a refrigerant circuit) for circulating the refrigerant.

The pump 9 conveys the low temperature water from the lower part of the hot water storage tank 7 to the first heat exchanger of the heat pump unit 8. The pump 9 is provided with an inverter circuit, and the water flow rate at the time of transportation can be changed by changing the drive rotation speed according to the control value instructed from the control board of the heat pump unit 8.

The configuration of the hot water supply device 100 has been schematically described above. Hereinafter, the configurations of the control device 2 of the hot water supply device 100 and the mixing valves 5 and 6 will be described in detail.

First, the configuration of the control device 2 will be described. As shown in FIG. 2, the control device 2 includes a CPU (Central Processing Unit) 20, a communication interface 21, a ROM (Read Only Memory) 22, a RAM (Random Access Memory) 23, and a secondary storage device 24. To prepare for. These components are connected to each other via the bus 25. The CPU 20 controls the control device 2 in an integrated manner. Details of the functions realized by the CPU 20 will be described later.

The communication interface 21 includes a NIC (Network Interface Card controller) for performing wired communication or wireless communication. The communication interface 21 is communicably connected to an external terminal, a control board of the heat pump unit 8 and a drive device (not shown). The drive device is a device composed of a stepping motor, gears, etc., for rotationally driving the valve body 50 (described later) of the mixing valves 5 and 6.

The control device 2 accepts a user operation from an external terminal via the communication interface 21, and causes the external terminal to display an operating state of the hot water supply device 100, an operation screen, and the like. Further, the control device 2 transmits a control signal to the control board of the heat pump unit 8 to control the compressor, the expansion valve, the blower, etc., or transmits the control signal to the drive device to transmit the control signal to the valve bodies of the mixing valves 5 and 6. It controls the rotation drive of 50.

The ROM 22 stores a plurality of firmwares and data used when executing these firmwares. The RAM 23 is used as a work area of the CPU 20.

The secondary storage device 24 is composed of an EEPROM (Electrically Erasable Programmable Read-Only Memory), a readable / writable non-volatile semiconductor memory such as a flash memory, a hard disk drive, or the like. The secondary storage device 24 stores a program for controlling the operation of the hot water supply device 100, data used when executing these programs, and the like. The data used when executing the program includes data showing the correspondence between the operation mode of the hot water supply device 100 and the opening degrees of the mixing valves 5 and 6.

As shown in FIG. 3, the control device 2 functionally includes a user interface unit 200, a device state acquisition unit 201, a device control unit 202, and an operation mode execution unit 203. Each of these functional units is realized by the CPU 20 executing one or a plurality of programs stored in the secondary storage device 24.

The user interface unit 200 performs user interface processing via an external terminal. That is, the user interface unit 200 accepts user operations via an external terminal. Further, the user interface unit 200 transmits information to be presented to the user (for example, information indicating the operating state of the hot water supply device 100) to the external terminal, and displays the information on the external terminal. The user interface unit 200 also functions as a reception means and a designated reception means, as will be described later.

The equipment state acquisition unit 201 acquires data such as an operating state and a measured temperature from the heat pump unit 8 at regular time intervals (for example, 30 seconds), and acquires data indicating the opening degree of the mixing valves 5 and 6 from the drive device. do. A water level sensor may be provided in the hot water storage tank 7 so that the device state acquisition unit 201 acquires data indicating the water level in the hot water storage tank 7.

The device control unit 202 controls the operation of the entire hot water supply device 100 according to the user operation via the external terminal.

The operation mode execution unit 203 reads the opening degree of the mixing valves 5 and 6 corresponding to the operation mode selected by the user operation via the external terminal from the secondary storage device 24, and opens the mixing valves 5 and 6 based on the reading. The device control unit 202 is made to control the degree.

Next, the configuration of the mixing valve 5 will be described. Since the mixing valve 6 has the same configuration as the mixing valve 5, the same reference numerals are given to the components common to the components of the mixing valve 5 described below, and the description thereof will be omitted.

Before explaining the overall configuration of the mixing valve 5, first, the configuration of the valve body 50 included in the mixing valve 5 will be described.

The valve body 50 has a cylindrical shape as a whole, has a drive input portion 51 rotationally driven by a drive device at the upper portion, and has a hollow portion 52 having a hollow inside at the lower portion. The drive input unit 51 is formed in a tooth shape so that the upper side surface meshes with the gear of the drive device.

As shown in FIG. 4A, the hollow portion 52 has four openings 53, 54, 55, 56 on the side surface. The lower portion 57 of the hollow portion 52 is open downward. The upper part of the hollow portion 52 is not open.

As shown in FIG. 4B, the openings 53 and 54 are circular, and the openings 55 and 56 are elliptical. The opening area of the openings 55 and 56 is smaller than that of the openings 53 and 54.

The openings 53, 54, 55, and 56 are arranged at lateral positions in the drawing that do not overlap each other. The openings 53 and 55 have the same vertical position in the figure at their centers. The openings 54 and 56 have the same vertical position in the figure at the center thereof. However, the openings 53 and 55 and the openings 54 and 56 are different in the vertical position in the drawing.

The configuration of the valve body 50 has been described above. Therefore, the overall configuration of the mixing valve 5 will be described below while explaining the configuration of the housing 70.

As shown in FIGS. 5C and 6C, the mixing valve 5 includes a valve body 50 and a housing 70 that rotatably holds the valve body 50. In addition, in FIGS. 5C and 6C, only the housing 70 is shown in a vertical cross section so that the inside thereof can be seen through.

The housing 70 has a hollow inside, has two water inlets 71 and 72 on the side surface, and has a water outlet 73 at the lower part. The inlets 71 and 72 and the outlets 73 are circular. High-temperature water from the hot water storage tank 7 is supplied from the water inlet (first water inlet) 71, and low-temperature water is supplied from the water supply end 3 from the water inlet (second water inlet) 72. The water outlet 73 discharges hot water in which high temperature water and low temperature water are mixed.

Here, FIG. 5 (A), which is shown in association with the opening 53 of FIG. 5 (C) by a alternate long and short dash line, shows the overlap between the opening 53 and the water inlet 72 when the water inlet 72 is viewed from the front. It shows the state. FIG. 5 (B) shown in association with the opening 54 of FIG. 5 (C) by a alternate long and short dash line shows the overlapping state of the opening 54 and the water inlet 71 when the water inlet 71 is viewed from the front. ing.

FIG. 6 (A), which is shown in association with the opening 55 of FIG. 6 (C) by a alternate long and short dash line, shows an overlapping state of the opening 55 and the water inlet 72 when the water inlet 72 is viewed from the front. ing. FIG. 6 (B), which is shown in association with the opening 56 of FIG. 6 (C) by a alternate long and short dash line, shows an overlapping state of the opening 56 and the water inlet 71 when the water inlet 71 is viewed from the front. ing.

The drive input unit 51 of the valve body 50 receives a drive input from the drive device. As a result, as shown in FIG. 5, the valve body 50 is rotationally driven inside the housing 70 around the shaft L.

Here, in FIG. 5, the water inlet 71 overlaps with the circular opening 54, and the water inlet 72 overlaps with the circular opening 53. In FIG. 6, the water inlet 71 overlaps with the elliptical opening 56, and the water inlet 72 overlaps with the elliptical opening 55.

The amount of hot water flowing into the valve body 50 correlates with the flow path area formed by the overlap between the water inlet 71 and the opening 54 or the opening 56. The amount of low-temperature water flowing into the valve body 50 correlates with the flow path area formed by the overlap between the water inlet 72 and the opening 53 or the opening 55.

In the case of FIG. 5, the circular opening 53 having a larger opening area than the elliptical opening 55 and the water inlet 72 overlap each other, and the circular opening 54 having a larger opening area than the elliptical opening 56. And the water inlet 71 overlap. Therefore, the amount of high-temperature water and low-temperature water flowing into the valve body 50 increases.

In the case of FIG. 6, the elliptical opening 55 having a smaller opening area than the circular opening 53 and the water inlet 72 overlap each other, and the elliptical opening 56 having a smaller opening area than the circular opening 54. And the water inlet 71 overlap. Therefore, the amount of high-temperature water and low-temperature water flowing into the valve body 50 is reduced.

In this way, in the mixing valve 5, the amount of high-temperature water and low-temperature water flowing into the valve body 50 changes depending on the rotation position of the valve body 50. Here, the circular opening 53 of the valve body 50 is designed to have a size smaller than the water inlet 72 of the housing 70. The circular opening 54 of the valve body 50 is designed to be smaller than the water inlet 71 of the housing 70. Therefore, the valve body 50 limits the inflow of high-temperature water and low-temperature water supplied from the water inlets 71 and 72 according to the rotation position, and adjusts the inflow amounts of high-temperature water and low-temperature water.

The opening area of the lower portion 57 of the hollow portion 52 of the valve body 50 and the opening area of the water outlet 73 of the housing 70 are designed to be larger than the opening areas of the water inlets 71 and 72. The amount of hot water discharged from the outlet 73 is the same as the amount of hot water and low temperature water flowing into the valve body 50. Therefore, in the case of FIG. 5, the outflow amount of hot water becomes large like the inflow amount of high temperature water and low temperature water, and a large flow rate operation state is established. In the case of FIG. 6, the outflow amount of hot water becomes small like the inflow amount of high temperature water and low temperature water, and a small flow rate operation state is established.

Here, the relationship of the flow path area (ratio) with respect to the rotation position of the valve body 50 of the mixing valve 5 will be described with reference to FIGS. 7 and 8. In the graphs of FIGS. 7 and 8, the horizontal axis indicates the rotation position of the valve body 50, and the vertical axis indicates the ratio of the flow path area.

First, the curve shown in FIG. 7 is the sum of the flow path areas formed by the overlap of the four openings 53, 54, 55, 56 and the two inlets 71, 72 (for convenience, the "total area" is used. ) Is shown to be the ratio of the flow path area (referred to as “individual area” for convenience) formed by the water inlet 71 and the opening 54 or the opening 56 to the maximum value. The maximum value of the total area corresponds to the maximum value of the outflow amount of hot water discharged from the water outlet 73, and the individual area corresponds to the inflow amount of hot water from the water inlet 71 to the valve body 50.

The curves shown in FIG. 8 are four with respect to the maximum value of the total channel area (total area) formed by the overlap of the four openings 53, 54, 55, 56 and the two inlets 71, 72. The ratio of the sum total area (total area) of the flow path formed by the overlap between the openings 53, 54, 55, 56 and the two water inlets 71, 72 is shown. The total area corresponds to the total amount of high-temperature water inflow from the inlet 71 to the valve body 50 and the total amount of low-temperature water inflow from the inlet 72 to the valve body 50 (that is, the amount of hot water discharged from the outlet). do.

The curve shown in FIG. 8 shows that the ratio of the flow path area fluctuates only about 0.1 in the range of the rotation position of 85 to 175 °. The curve shown in FIG. 8 shows that the ratio of the flow path area fluctuates only about 0.04 in the range of the rotation position of 260 to 360 °. That is, in the range of the rotation position of 85 to 175 ° and the range of the rotation position of 260 to 360 °, the ratio of the flow path area is in a state of only fluctuation within 0.1. It can be said that the range in which the fluctuation of the ratio of the flow path area is within 0.1 is the range in which the fluctuation of the outflow of hot water is constant because the fluctuation of the outflow of hot water is small. In addition, in the range of the rotation position of other rotation positions (0 to 85 ° and 175 to 260 °), if the change is 85 °, the ratio of the flow path area changes by 0.8, whereas the above-mentioned Within the range of the rotation position, even if it changes by 85 °, the ratio of the flow path area changes by less than 0.1. Therefore, it can be said that the fluctuation of the outflow amount of hot water is suppressed in the above rotation position range as compared with the other rotation position range.

On the other hand, the curve shown in FIG. 7 shows that the ratio of the flow path area fluctuates from 1 to 0 in the range of the rotation position of 85 to 175 °. The curve shown in FIG. 7 shows that the ratio of the flow path area varies from 1 to 0 in the range of the rotation position of 260 to 360 °. That is, in the range of the rotation position of 85 to 175 ° and the range of the rotation position of 260 to 360 °, the mixing ratio of the hot water and the low temperature water varies significantly.

As described above, when the valve body 50 rotates in the rotation position range of 85 to 175 °, the fluctuation of the outflow amount of the hot water is suppressed, but the temperature of the hot water changes significantly. This range is referred to as a first mixing ratio adjustment section.

As described above, when the valve body 50 rotates in the range of the rotation position of 260 to 360 °, the fluctuation of the outflow amount of the hot water is suppressed, but the temperature of the hot water changes significantly. This range is referred to as a second mixing ratio adjustment section.

In the curve shown in FIG. 8, the ratio of the flow path area in the second mixing ratio adjustment section is about 0.2 to 0.24, and the ratio of the flow path area in the first mixing ratio adjustment section is 0.9 to 0.24. It shows that it is significantly smaller than about 1. Therefore, comparing the first mixing ratio adjustment section and the second mixing ratio adjustment section, both are common in that the fluctuation of the outflow amount of hot water is suppressed, but the temperature of hot water changes significantly. However, in the first mixing ratio adjusting section, the outflow amount of hot water is large, whereas in the second mixing ratio adjusting section, the outflow amount of hot water is small, and the outflow amount of both hot water is small. different.

Therefore, according to the mixing valve 5, high temperature water and low temperature water are mixed depending on whether the rotation position of the valve body 50 of the mixing valve 5 is set to the first mixing ratio adjusting section or the second mixing ratio adjusting section. The amount of hot water discharged can be adjusted in two stages. In this case, since the outflow amount of hot water can be adjusted only by the mixing valve 5, the flow rate adjusting valve becomes unnecessary. Therefore, the hot water supply device 100 can be configured at low cost.

Further, according to the mixing valve 5, when either the first mixing ratio adjusting section or the second mixing ratio adjusting section is selected, the selected first mixing ratio adjusting section or the second mixing section is selected. The temperature can be adjusted within the range of the rotation position in the ratio adjustment section. It should be noted that, within the range of the rotation position excluding the first mixing ratio adjustment section and the second mixing ratio adjustment section, there is a large change in both the outflow amount and the mixing ratio of the hot water in which the high temperature water and the low temperature water are mixed. It is also possible to adjust the outflow amount of hot water and the mixing ratio in the same manner as the conventional mixing valve.

The overall configuration of the mixing valve 5 has been described above. Therefore, a process in which the control device 2 controls the rotational drive of the valve body 50 of the mixing valves 5 and 6 will be described below.

The control device 2 controls the opening degree of the mixing valves 5 and 6 (rotational position of the valve body 50) so as to perform a large flow rate operation by adjusting to the first mixing ratio adjusting section, and adjusts the second mixing ratio. It is controlled to perform small flow rate operation by adjusting to the section. Here, the correspondence between the operation mode of the control device 2 of the hot water supply device 100 and the opening degrees of the mixing valves 5 and 6 will be described.

As described above, the control device 2 stores data indicating the correspondence between the operation mode of the hot water supply device 100 and the opening degrees of the mixing valves 5 and 6 in the secondary storage device 24. In this data, as shown in FIG. 9, the large flow rate and the small flow rate, which are the openings of the mixing valves 5 and 6, are associated with the operation modes 1 to 4. The control device 2 accepts the selection of the operation mode by the user operation, and sets the rotation position of the valve body 50 of the mixing valves 5 and 6 so as to have the opening degree of the mixing valves 5 and 6 corresponding to the selected operation mode. Control.

When the operation mode 1 is selected, the mixing valves 5 and 6 all have a large flow rate opening. In this case, the hot water supply device 100 normally performs a hot water supply operation. The normal hot water supply operation is the same as the hot water supply operation when hot water is simultaneously supplied to a plurality of hot water supply terminals in a conventional hot water supply device.

When the operation mode 2 is selected, the mixing valve 5 has a large flow rate opening, and the mixing valve 6 has a small flow rate opening. In this case, the hot water supply device 100 performs a priority hot water supply operation that gives priority to hot water supply to the hot water supply terminal 110. In this priority hot water supply operation, when hot water is supplied to the hot water supply terminals 110 and 120 at the same time, the amount of hot water supplied to the hot water supply terminal 110 is larger and the amount of hot water supplied to the hot water supply terminal 120 is smaller than that of the conventional hot water supply device.

When the operation mode 3 is selected, the mixing valve 5 has a small flow rate opening degree, and the mixing valve 6 has a large flow rate opening degree. In this case, the hot water supply device 100 performs a priority hot water supply operation that gives priority to hot water supply to the hot water supply terminal 120. In this priority hot water supply operation, when hot water is supplied to the hot water supply terminals 110 and 120 at the same time, the amount of hot water supplied to the hot water supply terminal 120 is larger and the amount of hot water supplied to the hot water supply terminal 110 is smaller than that of the conventional hot water supply device.

When the operation mode 4 is selected, the mixing valve 5 has a small flow rate opening, and the mixing valve 6 also has a small flow rate opening. In this case, the hot water supply device 100 performs a water-saving hot water supply operation. In this water-saving hot water supply operation, when hot water is supplied to the hot water supply terminals 110 and 120 at the same time, the amount of hot water supplied to both the hot water supply terminals 110 and 120 is smaller than that of the conventional hot water supply device.

As described above, according to the hot water supply device 100 of the present embodiment, various variations of hot water supply operation can be performed only by adjusting the opening degree of the mixing valves 5 and 6.

As described above, when the user selects the operation mode 4, the water heater 100 can be made to perform the water-saving hot water supply operation. As a result, the power consumption of the heat pump unit 8 can be reduced, energy saving can be realized, and water saving can be realized.

Further, the user can select the operation mode 2 or 3 to cause the hot water supply device 100 to perform the priority hot water supply operation. As a result, the amount of hot water supplied to both the hot water supply terminal 110 and the hot water supply terminal 120 can be biased. For example, the user gives priority to the hot water filling of the hot water supply terminal 120, which is a bathtub, to shorten the time until the hot water filling is completed, or when he / she wants to use the shower, gives priority to the hot water supply of the hot water supply terminal 110, which is the shower head. Comfort can be ensured even inside. Therefore, the convenience of the user is improved.

In this way, by accepting the selection of the operation mode 1 or the operation mode 4, the user interface unit 200 of the control device 2 functions as a reception means for accepting the selection of either the normal hot water supply operation or the water-saving hot water supply operation. Further, by accepting the selection of either the operation mode 2 or the operation mode 3, the user interface unit 200 of the control device 2 designates the hot water supply terminal 110 or the hot water supply terminal 120 to be prioritized among the two hot water supply terminals 110 and 120. It also functions as a designated reception means for accepting.

The present invention is not limited to the above embodiment, and various modifications and applications can be made without departing from the gist of the present invention.

In the above embodiment, the openings 53, 54, 55, 56 of the mixing valves 5 and 6 are circular or elliptical, and are four. However, the number, shape, and size of openings are not limited to this.

For example, the number of openings may be three, five or more, and the shape of the openings may be triangular. Further, it is not necessary that the size and shape of the openings 53, 54, 55, and 56 are different from each other in the size and shape of a circle or an ellipse. For example, like a shower hole, all the openings are made the same size to increase the number, and the shape of the set of openings is made circular or triangular, and the flow formed by the overlapping number of openings and water inlets. It may be configured to adjust the road area. Further, the shapes and sizes of the openings may all be different. The arrangement of the openings is not limited to the arrangements such as the openings 53, 54, 55, 56.

In the above embodiment, the circular opening 53 of the valve body 50 is designed to be smaller than the water inlet 72 of the housing 70, and the circular opening 54 of the valve body 50 is from the water inlet 71 of the housing 70. Is also designed for small dimensions. However, the configuration is not limited to this, and the valve body 50 and the housing 70 may be configured so that the inflow amount can be adjusted by the rotation of the valve body 50. The rotation of the valve body 50 may change the flow path area formed by the overlap between the opening 53 and the water inlet 72 and the flow path area formed by the overlap between the opening 54 and the water inlet 71. ..

In the above embodiment, the valve body 50 of the mixing valves 5 and 6 has a cylindrical shape in which two types of openings 53, 54, 55 and 56, that are circular and elliptical, are arranged in the lateral direction, and is configured to be rotationally driven. ing. However, the valve body 50 has a rectangular shape in which two types of openings 53, 54, 55, and 56 are arranged in the vertical direction, and may be driven to move the piston. Further, the valve body 50 may be composed of a diaphragm. Therefore, the mixing ratio adjustment period can be set not only as the range of the rotation position but also as the drive range of the valve body.

In the above embodiment, the valve body 50 of the mixing valves 5 and 6 has a first mixing ratio adjusting section and a second mixing ratio adjusting section, and is configured so that the outflow amount of hot water can be adjusted in two stages. .. However, the mixing ratio adjustment section may be configured to be 3 or more, or the outflow amount of hot water may be adjusted in 3 steps or more. The opening degree of the mixing valve may be configured to have an opening degree of "no flow rate". Further, as described above, the arrangement and shape of the openings may be changed so that the outflow amount of hot water can be continuously adjusted.

In the above embodiment, the hot water supply device 100 provided with the two mixing valves 5 and 6 is configured to supply hot water to the two hot water supply terminals 110 and 120. However, a hot water supply device having three or more mixing valves may be configured to supply hot water to three or more hot water supply terminals. Further, a hot water supply device having only one mixing valve may be configured so that the opening degree of the large flow rate of the mixing valve can be switched to the normal hot water supply operation and the opening degree of the small flow rate can be switched to the water saving hot water supply operation.

100 Hot water supply device, 2 control device, 3 water supply end, 5, 6 mixing valve, 7 hot water storage tank, 8 heat pump unit, 9 pump, 20 CPU, 21 communication interface, 22 ROM, 23 RAM, 24 secondary storage device, 25 bus , 50 valve body, 51 drive input part, 52 hollow part, 53, 54, 55, 56 opening, 57 lower part, 70 housing, 71, 72 water inlet, 73 water outlet, 110, 120 hot water supply terminal, 200 user interface Unit, 201 device status acquisition section, 202 device control section, 203 operation mode execution section

Claims (4)

A hot water storage tank that stores hot water and
A plurality of mixing valves for mixing the low-temperature water and the high-temperature water supplied from the hot water storage tank,
Designated reception means and
Equipped with
Each of the plurality of mixing valves is connected to each of the plurality of hot water supply terminals to which hot water is to be supplied.
Each of the plurality of mixing valves
A housing having a first inlet for supplying the high-temperature water, a second inlet for supplying the low-temperature water, and an outlet for discharging hot water in which the high-temperature water and the low-temperature water are mixed. When,
A valve body driven to adjust the inflow amount of the high temperature water supplied from the first inlet and the low temperature water supplied from the second inlet.
Equipped with
The designated receiving means receives the designation of the hot water supply terminal to be prioritized among the plurality of hot water supply terminals, and receives the designation.
In the driving range of the valve body, the first mixing ratio adjusting section and the first mixing ratio adjustment section in which the mixing ratio of the high temperature water and the low temperature water changes while the fluctuation of the outflow amount of the hot water discharged from the outlet is suppressed. It has a mixture ratio adjustment section of 2 and has
The outflow amount of the hot water differs between the first mixing ratio adjusting section and the second mixing ratio adjusting section.
The valve body of the mixing valve corresponding to the hot water supply terminal designated by the designated receiving means is driven within the range of the first mixing ratio adjusting section at the time of hot water supply.
The valve body of the mixing valve corresponding to the hot water supply terminal other than the hot water supply terminal designated by the designated reception means is driven within the range of the second mixing ratio adjustment section at the time of hot water supply.
Water heater. The valve body is cylindrical with a plurality of openings on the side surfaces and is rotationally driven inside the housing.
The flow path area formed by the overlap of any of the plurality of openings with the first water inlet, and the flow path area formed by the overlap of any of the plurality of openings with the second water inlet. The hot water supply device according to claim 1, wherein the mixing ratio or the outflow amount of the hot water changes when the valve body changes according to the rotation position of the valve body. The plurality of openings include at least two openings having different opening areas corresponding to the first water inlet, and at least two openings having different opening areas corresponding to the second water inlet. 2. The hot water supply device according to claim 2. Further provided with a reception means for accepting a choice between a normal hot water supply operation and a water-saving hot water supply operation in which the outflow amount of the hot water is smaller than that of the normal hot water supply operation.
The outflow amount of the hot water in the first mixing ratio adjusting section is larger than the outflow amount of the hot water in the second mixing ratio adjusting section.
When the selection of the normal hot water supply operation is accepted, the valve body is driven within the range of the first mixing ratio adjustment section at the time of hot water supply.
The hot water supply device according to any one of claims 1 to 3, wherein when the selection of the water saving hot water supply operation is accepted, the valve body is driven within the range of the second mixing ratio adjusting section at the time of hot water supply. ..

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