JPH11148731A - Hot-water storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heat up hot-water to a set temperature surely until the using amount of hot-water is increased by a method wherein a time zone enough to make early the starting point of operation on the day is provided to function the capacity of a compressor maximally even when the compressor, having a small compressing capacity, is employed. SOLUTION: Water in a hot-water storage tank 11 is heated up by heat collecting effect of the heat pump heat collecting operation or solar heat collecting operation through a condenser 33. Time zone is divided into a first time zone or a daytime zone from morning until evening, a second time zone, successive to the first time zone, and a third time zone, successive to the second time zone, while operation is controlled by an operation control means in respective time zones. In the first time zone, only the heat collecting operation of a heat pump is permitted. In the second time zone, either one of the solar heat collecting operation or the heat pump heat collecting operation is permitted. In the third time zone and a time zone successive to the third time zone, only the heat pump heat collecting operation is permitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-water supply type hot water supply apparatus for efficiently boiling water in a hot water storage tank by selectively using a heat pump heat collecting operation and a solar (solar heat) heat collecting operation.

[0002]

2. Description of the Related Art Conventionally, as described in, for example, Japanese Patent Publication No. 4-19458, there is known a hot water storage type hot water supply apparatus in which hot water in a hot water storage tank is heated using a solar heat collector. ing.

[0003] In this hot water storage type hot water supply apparatus, while the solar heat collector has the advantage as an energy saving device using solar energy, it is susceptible to the weather and the inconvenience of not being able to obtain the heat collection and boiling when necessary. For this reason, a method is used in which a heat pump collector capable of constantly collecting heat even from atmospheric heat is used in combination to compensate for unstable elements of solar heat collection.

[0004] In this hot water storage type hot water supply apparatus, the morning is a time period for lowering the rotation speed of the compressor to improve the coefficient of performance, and the afternoon is a priority time for increasing the rotation speed of the compressor to improve the boiling capacity. When the solar heat collection conditions are met, such as when the amount of sunshine exceeds a predetermined value on a sunny day, the solar heat collection operation is performed, and the hot water tank is operated at low running cost using solar energy. When the conditions of solar heat collection are not met, such as when the amount of sunshine falls below a predetermined level on cloudy or rainy days, the heat pump heat collection operation is performed, and the atmospheric heat is used. The water in the hot water tank is heated.

[0005]

By the way, in such a hot water storage type hot water supply apparatus, the boiling hot water is stored by the evening so that it can be used in the time period after the evening when the frequency of using a large amount of hot water such as bathing increases. Must be completed.

In the conventional hot water supply type hot water supply system, the number of revolutions of the compressor is controlled uniformly in the morning and afternoon time zones. In order to complete the upper hot water storage, since the boiling capacity is suppressed in the morning, boiling in a short time period (about 5 hours) in the afternoon, in which the boiling capacity is particularly high, is necessary.

For this reason, in the heat collecting operation in the morning, the required capacity of the compressor is small regardless of the weather, but in the heat collecting operation in the afternoon, it is necessary to raise the set temperature in a short time zone. Therefore, a large-capacity compressor having only a high compression capacity is required, and since this large-capacity compressor is used in common, it is not rational in terms of energy saving.

[0008] The present invention has been made in view of such a point, and even if a compressor having a small compression capacity is used, the time period for starting the operation on the day is set to be early so that the capacity of the compressor can be improved. Hot water storage that can be heated up to the set temperature by the time hot water usage increases by maximizing the function of hot water, and the convenience of hot water usage can be improved along with reducing product costs It is an object of the present invention to provide a hot water supply apparatus.

[0009]

According to a first aspect of the present invention, there is provided a hot water supply type hot water supply apparatus comprising: a heat pump collector having a closed circuit having a compressor, a condenser, and an evaporator; And a switching means for selectively switching one of an evaporator and a solar heat collector to the compressor and the condenser, and a heat pump heat collecting operation and a solar heat collector. In a hot-water storage type hot water supply device that heats water in a hot water storage tank via a condenser by one of the heat collecting operations, a solar heat collecting operation control means for performing the solar heat collecting operation, Heat pump heat collection operation control means for performing heat operation,
The daytime period from morning to evening is divided into a first time period, a second time period following the first time period, and a third time period following the second time period. During the second time period, only one of the solar heat collecting operation and the heat pump heat collecting operation is permitted during the second time period, and the third time period and the third time period are performed. Operation control means for permitting only the heat pump heat collection operation to be executed in a time zone following the time zone.

The operation control means allows the heat pump heat collecting operation to be performed in a first time period, and one of a solar heat collecting operation and a heat pump heat collecting operation in a second time period following the first time period. Is performed, and the heat pump heat collecting operation is performed in a third time period following the second time period. For example, the conditions of the solar heat collecting operation are not satisfied in a season other than the summer season, and the compression capacity is not satisfied. Even if a small compressor is used, the rated capacity of the compressor is made to function at the maximum in each time zone, as long as there is no fluctuation due to the use of hot and cold water at least by the evening of the third time zone. In, hot water at a set temperature is stored in a hot water storage tank.

According to a second aspect of the present invention, in the hot water supply type hot water supply device of the first aspect, the time zone to be apportioned is set to be longer in the second time zone than in the first time zone. The third time zone is set longer than the second time zone.

For example, the first time period is a short time in the morning, the second time period is several hours mainly in the morning, and the third time period is several hours until evening. The apportionment can be set appropriately considering the usage situation.

According to a third aspect of the present invention, in the hot water supply type hot water supply apparatus according to the first or second aspect, the third time zone includes a time zone including night after evening. .

In response to fluctuations due to the use of hot and cold water during boiling, the boiling time is increased by that much, even if it is delayed.

According to a fourth aspect of the present invention, there is provided a hot water supply type hot water supply device according to any one of the first to third aspects, wherein a hot water amount detection means for detecting the amount of hot water in the hot water storage tank and a temperature of the solar heat collector are detected. And a solar heat collecting temperature detecting means.
The operation control means allows the heat pump heat collection operation to be performed based on the amount of hot water in the hot water tank detected by the hot water amount detection means in the first time zone, and the solar heat collection temperature detection means in the second time zone. The solar heat collecting operation is prioritized based on the sunshine state corresponding to the detected temperature, and either one of the solar heat collecting operation and the heat pump heat collecting operation or the alternate operation thereof is permitted, and a third time period is entered. This allows execution of the heat pump heat collection operation or continuous execution of the heat pump heat collection operation regardless of the sunshine state.

In the first time period, the execution of the heat pump heat collecting operation is allowed in advance based on the amount of hot water in the hot water storage tank, and in the second time period, the solar heat collecting operation is prioritized based on the sunshine state and the solar heat collecting operation is performed. In order to allow the execution of either one of the heat pump heat collection operations or their alternating operation, and to allow the heat pump heat collection operation to be performed in the third time zone regardless of the sunshine state, priority is given to the solar heat collection operation, Even if a compressor with a small compression capacity during heat pump heat collection operation is used, hot water at the set temperature can be obtained by the target time,
Reduce power consumption during heat pump heat collection operation to save energy.

According to a fifth aspect of the present invention, there is provided a hot water supply type hot water supply apparatus according to any one of the first to fourth aspects, further comprising a water supply temperature detection means for detecting a temperature of water supply to the hot water storage tank. The means permits the execution of the heat pump heat collection operation in the first time zone when the feedwater temperature detected by the feedwater temperature detecting means is equal to or lower than a predetermined temperature.

If the supply water temperature is equal to or lower than the predetermined temperature, execution of the heat pump heat collection operation is permitted in advance during the first time period, so that the heat pump heat collection efficiency can be set regardless of the weather even in a season other than summer, when heat collection efficiency is reduced. By the time when the temperature and the target amount of hot water are increased, the hot water can be reliably stored.

A hot water supply type hot water supply device according to a sixth aspect of the present invention is the hot water supply type hot water supply device according to any one of the first to fifth aspects, wherein a boiling increase setting means for setting a boiling increase and a hot water amount detection for detecting a hot water amount in the hot water storage tank. Operation control means, when the boiling increase is set by the boiling increase setting means, the hot water in the hot water storage tank is operated by one of a heat pump heat collecting operation and a solar heat collecting operation or an alternate operation thereof. When the hot water amount detected by the hot water amount detecting means becomes equal to or less than a predetermined hot water amount after the water temperature is raised to the set temperature, the heat pump heat collection operation is performed to increase the boiling water.

When the increase in boiling water is set, the hot water in the hot water storage tank is heated to the set temperature by one of the heat pump heat collecting operation and the solar heat collecting operation or an alternate operation thereof, and then the hot water can be reduced to a predetermined hot water amount or less. For example, the boiling by the heat pump heat collecting operation is executed to secure a necessary amount of the boiling water.

According to a seventh aspect of the present invention, in the hot water supply type hot water supply apparatus according to the sixth aspect, the operation control means includes:
The execution of the increase in boiling by the heat pump heat collecting operation in the time zone until the time zone is started is prohibited.

Since the execution of the boiling increase by the heat pump heat collecting operation in the time period from the lapse of a predetermined time continuing in the third time period to the beginning of the next time period of the next day is prohibited, the boiling increase is set. Even if it is kept, excessive increase in boiling is suppressed, and it is possible to save energy by effectively utilizing solar heat collection of the next day without accompanying the trouble of the setting release operation.

In the hot-water storage type hot water supply apparatus according to the eighth aspect, in the hot-water storage type hot water supply apparatus according to any one of the first to fifth aspects, an early boiling operation mode in which boiling is executed only in the heat pump heat collecting operation is set. Operation mode switching means for performing the heat pump heat collection operation regardless of the first, second, and third time zones when the early boiling operation mode is set by the operation mode switching means. It allows for limited execution.

When the early boiling operation mode is set, the heating operation is limited to the heat pump heat collection operation regardless of the time zone, and the amount of hot water at the set temperature that requires the boiling is usually (standard). In a shorter time than in the boiling operation mode.

According to a ninth aspect of the present invention, in the hot water storage type hot water supply device according to any one of the first to fifth aspects, a solar heating operation mode in which the heating is performed only in the solar heat collecting operation is set. Operating mode switching means,
The operation control means, when the solar heating mode is set by the operation mode switching means, limits the operation to the solar heat collecting operation only during the sunshine hours and allows the boiling operation to be performed.

When the solar boiling operation mode is set, the heating operation is limited to the solar heat collecting operation only during the sunshine hours, and the burden of power consumption is reduced. To save energy.

According to a tenth aspect of the present invention, there is provided a hot water storage type hot water supply apparatus according to any one of the first to fifth aspects,
An operation mode switching means for selectively setting an early boiling operation mode in which heating is performed only in the heat pump heat collecting operation and a solar heating operation mode in which heating is performed only in the solar heat collecting operation. Comprising, the operation control means,
When the early boiling operation mode is set by the operation mode switching means, the execution of boiling is limited to the heat pump heat collection operation regardless of the time zone, and when the solar heat collection operation mode is set, Only in the daylight hours of the day including the morning of the day, the solar heat collecting operation is limited to the boiling operation.

When the early boiling operation mode is set, the heating operation is limited to the heat pump heat collection operation regardless of the time zone, and when the solar heat collection operation mode is set, the sunshine time is set. Only the solar heat collection operation is permitted within the zone and the boiling operation is allowed. In accordance with the purpose of use of the user, the required amount of hot water is secured by either one of the heat collection operations and energy is saved. And improve the convenience of usability.

In the hot water supply type hot water supply device according to the eleventh aspect, in the hot water supply type hot water supply device according to the eighth or tenth aspect, when the operation mode switching means sets the early boiling operation mode, the operation control means sets the predetermined. This allows the set temperature to be raised once a day based on the operation start time.

When the early boiling operation mode is set, the set boiling once a day is permitted based on a predetermined starting time of the operation start. Reduce boiling.

A twelfth aspect of the present invention is the hot water supply type hot water supply device of the eleventh aspect, further comprising a boiling increase setting means for setting an increase in boiling water, and a hot water amount detecting means for detecting the amount of hot water in the hot water storage tank. Then, the operation control means, when the boiling increase is set by the boiling increase setting means on condition that the combined use with the early boiling operation mode is set, the operation of the next day after the water in the hot water storage tank is heated to the set temperature. If the amount of hot water detected by the hot water amount detecting means decreases to or below a predetermined hot water amount by the start starting time, the increase in boiling by the heat pump heat collecting operation is executed.

When the boiling water is set, the boiling water in the hot water storage tank is heated to the set temperature, and every time the amount of hot water falls below the predetermined amount of water from the start of the next day to the start of operation on the next day, the boiling water is increased by the heat pump heat collection operation. To ensure that the required amount of hot water is always increased without being restricted by the time zone.

A hot water supply type hot water supply apparatus according to a thirteenth aspect is the hot water supply type hot water supply apparatus according to any one of the sixth, seventh and twelfth aspects, further comprising a hot water temperature setting means for setting a boiling hot water temperature. In addition, the boiling is performed at a temperature lower than the low-temperature side temperature at which the temperature of the hot water can be set by the hot water setting means.

The temperature of the hot water at the time of boiling is set to be equal to or lower than the temperature of the hot water on the low temperature side which can be set by the hot water temperature setting means, and the coefficient of performance at the time of boiling is improved, thereby suppressing a decrease in the heat exchange efficiency caused at the high temperature boiling. I do.

A hot water storage apparatus according to a fourteenth aspect of the present invention is the hot water storage type hot water supply apparatus according to the ninth aspect, wherein a boiling increase setting means for setting a boiling increase and a boiling detection for detecting the boiling of the hot water in the hot water storage tank. Operation control means, wherein when the boiling increase is set by the boiling increase setting means on the condition of the combined use setting with the solar heating operation mode, the boiling detection is performed by the end of the third time zone. If the boiling temperature is not detected by the means, the heating up to a predetermined temperature raising temperature is executed by the heat pump heat collecting operation.

If the boiling is not completed before the end of the third time zone, the temperature is raised to a predetermined temperature by a heat pump heat collection operation. The required amount of hot water is secured by compensating for the boiling shortage.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the hot water supply type hot water supply apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of a hot water supply type hot water supply apparatus, and FIG.
Is a hot water storage tank, adopting a hot water supply method of a stop-and-pull type. A water supply pipe 12 connected to a water supply pipe is connected to a lower part of the hot water storage tank 11, and a hot water supply pipe 13 connected to a hot water supply pipe is provided at an upper part. It is connected. The water supply pipe is connected to the water pipe via a water stop valve, a strainer, and the like.
For example, it is connected to a hot water supply tap installed in a bathroom, a kitchen, a washroom, or the like.

A drain pipe 15 having a drain valve 14 is connected to a lower portion of the hot water storage tank 11, and a pressure relief valve 16 for releasing the expansion of water when boiling is connected to the hot water supply pipe 13.

A heat exchange passage 17 is connected to the outer wall near the lower portion of the hot water storage tank 11 and communicates with the heat exchange passage 17 via the lower and upper communication ports 18 and 19. A heat exchange passage 20 is formed. A circulation pipe 21 is connected between the lower part of the hot water storage tank 11 and the lower part of the heat exchange passage 20, and a circulation pump for forcibly circulating the hot water in the lower part of the hot water storage tank 11 through the heat exchange passage 20. 22 are arranged.

On the outer wall of the body of the hot water storage tank 11, a remaining hot water level detection sensor 23 as a hot water level detecting means for detecting the remaining hot water level in the hot water storage tank 11, and a boiling detection for detecting boiling of hot water in the hot water storage tank 11. A boiling water detecting sensor 24 as a means and a water temperature detecting sensor 25 as a water temperature detecting means for detecting the temperature of the water supplied into the hot water storage tank 11 are provided.

Reference numeral 31 denotes a heat pump collector, which is a compressor.
32, condenser 33, expansion valve 34 and evaporator (evaporator)
35 is constituted by a closed circuit in which pipes 35, 38 are connected in series by pipes 36, 37, and 38, and a refrigerant is sealed in the closed circuit. The compressor 32, the expansion valve 34, and the evaporator 35 are housed in a casing (not shown) to form a heat pump collector main body 39.
The evaporator 35 has a fan 40 for sending outside air. Condenser 33
Is mounted outside the heat exchange passage body 17, and the heat exchanger 41 is constituted by the heat exchange passage 20 and the condenser 33.

A solar collector 51 is connected in parallel to the evaporator 35 via pipes 52 and 53 connected to pipes 37 and 38, respectively. The solar heat collector 51 is installed in a place with good sunshine conditions, for example, on a roof, and has a heat collecting panel 54.
Heat collection pipes 55 connected to the respective 53 are arranged in a meandering manner. At the connection position between the pipes 37 and 52, the compressor 32
And condenser 33 to evaporator 35 or solar collector 51
Three-way valve as switching means for switching and connecting either one of
56 are arranged. The three-way valve 56 is configured by an electric valve.

The solar heat collector 51 is provided with a solar heat collector sensor 57 as a solar heat collecting temperature detecting means for detecting a surface temperature of the solar heat collector 51, for example.

Next, the solar heat collecting operation will be described.

The three-way valve 56 is switched so as to close the evaporator 35 side and open the solar heat collector 51 side with respect to the condenser 33, and the compressor 32 is driven as shown by a solid line arrow in FIG. The refrigerant flows between the solar collector 51 and the condenser 33.

The refrigerant vaporized by solar heat in the solar collector 51 is conveyed to the condenser 33 and liquefied, and the heat of the refrigerant is given from the condenser 33 to the hot and cold water in the heat exchange passage 20 to exchange heat.

At this time, the circulation pump 22 is driven, and the hot water (water) on the lower side of the hot water tank 11 is forcibly circulated through the heat exchange passage 20 so as to return to the hot water tank 11 again. The whole amount can be boiled.

Since the compressor 32 has a low load only by transporting the refrigerant, the number of rotations is reduced as compared with the operation during the heat pump operation, and the power consumption is suppressed.

Next, the heat pump heat collecting operation will be described.

The three-way valve 56 is switched to open the evaporator 35 side and close the solar heat collector 51 side with respect to the condenser 33, and the compressor 32 and the fan 40 are driven. When the compressor 32 is driven, the refrigerant flows in the order of the compressor 32, the condenser 33, the expansion valve 34, and the evaporator 35 of the heat pump collector 31, as shown by the dashed arrow in FIG.

The refrigerant, which has been heat-exchanged with the outside air by the evaporator 35 and vaporized, is compressed by the compressor 32 and liquefied by the condenser 33, and the heat of the refrigerant is transferred from the condenser 33 to the hot and cold water in the heat exchange passage 20. Heat exchange.

At this time, the circulation pump 22 is driven, and hot water (water) on the lower side of the hot water storage tank 11 is forcibly circulated through the heat exchange passage 20 so as to return to the hot water storage tank 11 again. The whole amount can be boiled.

Next, FIG. 2 is a control block diagram of the hot water supply type hot water supply apparatus. A terminal 61 to which general commercial electric power of 100 V is supplied has a driving part 62 of the circulation pump 22, a compressor 32 and a three-way valve. The drive unit 63 of the fan 56 and the drive unit 64 of the fan 40 are connected to each other.

The driving unit 62 of the circulation pump 22 is selectively operated during the solar heat collecting operation or the heat pump heat collecting operation.
It is controlled by the hot and cold water circulation control means 65 that drives the 22. The drive unit 63 of the compressor 32 and the three-way valve 56 is controlled by a solar heat collecting operation control means 66 for executing the solar heat collecting operation and a heat pump heat collecting operation controlling means 67 for executing the heat pump heat collecting operation. The drive section 64 of the fan 40 is controlled by a heat pump heat collection operation control means 67 for executing the heat pump heat collection operation.

Reference numeral 71 denotes a main control unit which has a main control section 72 as operation control means which is constituted by a microcomputer for controlling the whole hot water supply type hot water supply apparatus.
72, hot water circulation control means 65, via an input / output device 73,
Solar heat collection operation control means 66, heat pump heat collection operation control means 67, hot water tank sensor group 74 (remaining hot water amount detection sensor 23, boiling-up detection sensor 24, supply water temperature detection sensor 25), solar heat collector sensor 57, remote controller 76 Are connected respectively. Further, the main control unit 72 includes a memory for storing various data and the like.
77 and a timer 78 for measuring time are connected respectively.

The main control section 72 is supplied with power from a control power supply section 79 connected to the terminal section 61 to which 100 V general commercial power is supplied. Backup power is supplied from the backup power supply unit 80 connected to the control power supply unit 79 to the memory 77 and a remote control unit 82 described later.

The remote control 76 is used for remote control.
An input / output unit 81 connected to the main control unit 72 is provided. The input / output unit 81 includes a remote control control unit 82 including a microcomputer, an operation unit 83 for performing various settings, and a display unit for performing various displays. 84 are connected.

The main control section 72 has a function of operation control means, and details of this function will be described later.

FIG. 3 shows a front view of the remote controller. The remote controller 76 includes, as an operation unit 83, an operation on / off button 91 for turning on / off the operation, a time setting button 92 for setting the time,
Operation mode switching button 93 as operation mode switching means,
A hot water temperature setting button 94 as hot water temperature setting means, a hot water increase button 95 as hot water setting means, and a hot water supply switching button 96 are provided. As the display unit 84, there are provided a display unit 97 that can switch and display the hot water temperature, the remaining hot water amount, and the time, and a lamp 98 that displays a setting state corresponding to each of the buttons 91 to 96.

With the operation mode switching button 93, the main controller 72
The operation mode by the function of the operation control means can be set to any of the standard heating operation mode, the early heating operation mode, and the solar heating operation mode.

With the hot water temperature setting button 94, the boiling temperature is set to about 60
° C and can be set to one of the standards of about 55 ° C.

The boiling-up button 95 is used to set a boiling-up setting that allows the boiling-up replenishment to be performed on condition that the predetermined amount of hot-water is used when the amount of hot water is more than a predetermined amount. Make it possible.

The hot water supply switching button 96 enables the use of other hot water heaters when the hot water supply apparatus is provided with another hot water heater.

Next, FIG. 4 shows a timing chart of the operation mode. In the function of the operation control means of the main control unit 72, the standard boiling operation having the winter mode, the summer mode, and the spring-autumn mode as the operation modes is described. Mode, an early boiling operation mode, and a solar heat collection operation mode, and further, corresponding to each operation mode, a first time zone from 7:00 to 8:00, 8:00 to 12: Second time period until 00, 12:
It is set proportionally in a third time period from 00 to 17:00.

In the standard boiling operation mode, the heat pump heat collection operation and the solar heat collection operation are selectively used depending on the time zone, and the boiling is performed by evening. The boiling is performed by detecting the temperature of the hot water in the hot water storage tank 11 with the hot water detection sensor 24 and for almost the entire amount of the hot water in the hot water storage tank 11. The boil-up temperature is run to a temperature set at either the higher 60 ° C. or the standard 55 ° C.

In the standard boiling operation mode, the boiling setting can be used together. When the boiling setting is set, after the boiling is completed to the set temperature, if a predetermined amount or more of hot water is used from the total boiling. Boiling is performed for the entire amount that uses the replenishment boiling by the heat pump heat collection operation. At this time, the boiling temperature of the boiling increment is
The set temperature may be used, but in order to improve the coefficient of performance (COP) characteristic of the heat pump heat collecting operation, the temperature is set to a standard range of about 55 ° C. or less and up to about 45 ° C. which does not hinder the supply of hot water, preferably the heat at the time of hot water supply. The temperature is set to 50 ° C. or about 55 ° C. in consideration of the amount of radiation loss and dilution with water. The time period during which the boiling increase is permitted is from 7:00 to 24:00.

In the early boiling operation mode, the heating is performed only once on the day starting from the first time zone only by the heat pump heat collection operation. Is more convenient when it is desired to obtain hot water at a set temperature within a short time. The boiling is performed by detecting the temperature of the hot water in the hot water storage tank 11 with the hot water detection sensor 24 and for almost the entire amount of the hot water in the hot water storage tank 11. The boil-up temperature is run to a temperature set at either the higher 60 ° C. or the standard 55 ° C.

In the early boiling operation mode, the boiling setting can be used together. When the boiling setting is set, after the boiling is completed to the set temperature, if a predetermined amount or more of hot water is used from the total boiling,
Boiling by the heat pump heat collecting operation is performed until the used amount is replenished and heated. The boiling temperature at this time may be the set temperature, but the coefficient of performance (CO
P) For the purpose of improving the characteristics, the temperature is set to a range of up to about 45 ° C. below the standard about 55 ° C. which does not hinder hot water supply, preferably 50 ° C. or about 55 ° C. as described above.
In addition, the boiling increase operation at this time is performed as many times as possible when the first time zone starts from 7:00 to 7:00 the next day, and when a predetermined amount or more of hot water is used from the total boiling time for 24 hours. I do.

In the solar heating mode, 8: 0 of the sunshine hours (second time zone and third time zone) in which the conditions of the solar heat collecting operation are satisfied only by the solar heat collecting operation.
The boiling is performed from 0 to 17:00, but in some cases, the boiling may be performed from the operation start point where the first time zone starts.

It is difficult to set the same boiling temperature as in the heat pump heat collecting operation by using only the solar heat collecting operation, but it is difficult. However, the upper limit boiling temperature in the standard solar heat collector is set to 55 ° C. Boil up. Although it depends on the conditions, boiling at a setting of 55 ° C. is not always possible, but it can be sufficiently used depending on the purpose even when boiling at 55 ° C. or lower.

In the solar heat collecting operation, the boiling increase setting can be used together. When the boiling increase setting is performed, the boiling increase is not performed in the sunshine hours from 8:00 to 17:00, and the boiling increase is not performed by 17:00. 5
When the boiling at 5 ° C. has not been reached, the temperature is raised by the heat pump heat collection operation.

Next, the operation of the present embodiment will be described.

The hot water storage operation by the function of the operation control means of the main control unit 72 will be described with reference to the timing chart of the operation mode of FIG. 4 and the flowcharts of the hot water storage operation of FIGS. 5 to 10.

First, the state until the first time zone (7:00) is described.

Monitoring of the amount of hot water remaining in the hot water storage tank 11 and the temperature of the supplied water;
An operation mode determination is started (step 1).

Until the current time enters the first time zone (step 2), it is checked whether the operation mode has been switched halfway (step 3), and it is checked whether the remaining hot water in the hot water storage tank 11 is equal to or more than a predetermined amount. (Step 4). The midway switching of the operation mode corresponds to the case where the midway switching is performed between the first time zone and the third time zone. If there is the midway switching, the process proceeds to step 81 described later to perform the processing. If the amount of remaining hot water in the hot water storage tank 11 is equal to or less than the predetermined amount, it is checked whether the early boiling operation mode is set (step 5). If not set, the process returns to step 2; 50
Proceed to to perform the processing.

Next, the case where the standard boiling operation mode is set and corresponds to the summer mode will be described. However, it is assumed that the boiling is not set.

When the current time enters the first time zone in step 2, monitoring of the temperature of the solar collector 51 is started (step 6), and it is confirmed whether the standard boiling operation mode is set (step 7). ).

If the standard boiling operation mode is set,
It is checked whether the amount of remaining hot water in the hot water storage tank 11 is equal to or more than a predetermined amount (step 8). If the supply water temperature is equal to or higher than 20 ° C., the operation mode of the summer mode is automatically selected and executed.

In the first time period, the heat pump heat collecting operation is not performed, and the process waits until the first time period elapses (step 10).

When the first time period elapses, ie, the second time period
In the time zone, it is checked whether or not the solar heat collecting operation can be performed based on the sunshine state corresponding to the temperature of the solar heat collector 51 (step 11). The heating operation is started (step 12).

During boiling by the solar heat collecting operation,
It is checked whether the set temperature has been reached (step 13), whether the second time period has elapsed (step 14), or whether the conditions for the solar heat collection operation are satisfied (step 15).

Normally, it is difficult to obtain the boiling temperature up to the set temperature (high, standard) depending on the condition of the remaining amount of hot water due to the limitation of the area of the solar heat collector 51 by the solar heat collecting operation alone. There is a possibility of boiling over. If the temperature reaches the set temperature before the second time period elapses, the solar heat collecting operation is stopped (step 16).

After stopping the solar heat collecting operation, whether the operation mode has been changed in the middle (step 17), whether the current time has reached the first time zone (step 18), or whether there is a boiling increase setting (step 17). Check 19). That is, if there is no midway switching of the operation mode and no increase in the boiling setting, respectively, the system waits for the midway switching of the operation mode and the setting of the next boiling until the first time zone of the next day, and enters the first time zone of the next day. Proceed to step 6 to execute the standard boiling operation mode.

If the operation mode is changed in the middle in step 17, the process proceeds to step 2 and the processing described later is performed.
If the first time period has come in step 18, the process proceeds to step 6 described above, and if there is a boost setting in step 19, the process proceeds to step 43 described later to perform the boiling process.

On a rainy or cloudy day, step 11
If the conditions for the solar heat collection operation are not satisfied in step 2, the boiling by the heat pump heat collection operation is started (step 2).
0).

After the start of boiling by the heat pump heat collecting operation, it is confirmed that the conditions of the solar heat collecting operation have been recovered (step 21). If there is a recovery, the heat pump heat collecting operation is stopped and the solar heat collecting operation is started. (Step 22), and the process proceeds to step 12 to start boiling by the solar heat collecting operation.

In addition, during boiling by the solar heat collecting operation, a sudden change in the weather causes the weather to change from sunny to cloudy or rainy.
If the conditions for the solar heat collecting operation are no longer satisfied in step 15, the solar heat collecting operation is stopped, and a switch command to the heat pump heat collecting operation is issued (step 23). Start boiling with.

Therefore, in the second time zone, the solar heat collecting operation and the heat pump heat collecting operation are appropriately selected according to the weather, and in addition to either one of the operations, the alternate operation is employed to achieve boiling. . The point that the solar heat collecting operation is limited to the second time zone is the adjustment in the second time zone where the influence on the boiling up until the evening is small, so that the solar heat collecting operation is effectively used to the maximum. Consideration has been given to energy saving.

That is, in the first half of the boiling process (toward the boiling process) to reach the set temperature, the temperature of the supplied water is being raised, and the temperature of the hot water to be exchanged is also in the low temperature range. Is also the stage where the heat recovery efficiency in hot water and water is the most improved by heat exchange in the solar heat collection operation at a reduced rotation speed, but this heat recovery efficiency decreases as the temperature rise approaches the high temperature range of the set temperature It is inevitable to do. In addition, since the solar heat collection operation has unstable factors that depend on the weather, rather than relying on the solar heat collection operation for a long time, it is necessary to identify the stage at which the heat recovery efficiency decreases, It is better to switch to a heat pump heat collection scheme that gives priority to the capacity of the compressor 32, which has increased the rotational speed of the compressor 32, and to rely on the heat recovery as soon as possible. This is because the total power consumption is suppressed and effective when the temperature increases and the boiling speed is accelerated.

Further, during the heating by the solar heat collecting operation, the heating to the set temperature is not achieved, and
When the time period elapses, that is, when the operation enters the third time period, the solar heat collection operation is stopped, and a switching command to the heat pump heat collection operation is issued (step 24), and the evening when the third time period ends Boiling by the heat pump heat collecting operation is started so as to achieve boiling by step (step 25).

During the heating by the heat pump heat collecting operation, it is confirmed whether or not the heating to the set temperature has been achieved (step 26). If the heating to the set temperature has been achieved, the heat pump heat collecting operation is stopped (step 27). Proceed to step 19.

In the second time period, when the heating is performed by the heat pump heat collecting operation, the step
At 21 it is checked whether or not the conditions for the solar heat collection operation have been recovered, and whether the temperature has reached the set temperature (step 28).
And whether the second time period has elapsed (step 29). When the boiling is achieved, the process proceeds to step 27 to stop the heat pump heat collecting operation. On the other hand, when the second time period has elapsed, the heat pump heat collecting operation is continued (step 30), and the process proceeds to step 26 to perform the third heat collecting operation. Continue boiling by heat pump heat collection operation in the time zone.

In addition, there is no or little use of hot water on the previous day,
If the remaining hot water amount in the hot water storage tank 11 is equal to or more than the predetermined amount in step 8, the elapse of the first time period is waited while checking the remaining hot water amount in the hot water storage tank 11 (step 31). After the first time period elapses, it is checked whether the remaining hot water amount in the hot water storage tank 11 is equal to or more than a predetermined amount (step 32). Until the second time period elapses (step 33), the remaining hot water amount If is less than or equal to the predetermined amount, the process proceeds to step 11 to start boiling by the solar heat collecting operation or the heat pump heat collecting operation.

After the second time period has elapsed, if the amount of remaining hot water in the hot water storage tank 11 is equal to or more than the predetermined amount (step 34), the process proceeds to step 17 described above. To start boiling by the heat pump heat collecting operation in the third time zone.

When the temperature of the hot water in the hot water storage tank 11 becomes lower than the predetermined temperature, the processing is performed assuming that the remaining hot water amount has decreased to the predetermined amount or less without using the hot water.

Next, the case where the standard boiling operation mode is set and corresponds to the winter mode or the spring-autumn mode will be described. However, it is assumed that the boiling is not set.

When the current time enters the first time zone in step 2, monitoring of the temperature of the solar collector 51 is started (step 6), and it is confirmed whether the standard boiling operation mode is set (step 7). ).

If the standard boiling operation mode is set,
It is checked whether the amount of remaining hot water in the hot water storage tank 11 is equal to or more than a predetermined amount (step 8). If the supply water temperature is equal to or lower than 20 ° C., the operation mode of the winter mode or the spring-autumn mode is automatically selected and executed according to the supply water temperature.

Boiling by the heat pump heat collecting operation in the first time period is started (step 35), and if the temperature reaches the set temperature before the first time period elapses (step 3).
6, 37) and stop the heat pump heat collection operation (step 3
8) Go to step 19 described above.

If the set temperature does not reach the set temperature even after the first time period has elapsed, that is, when the second time period has started (step 39), the sunshine corresponding to the temperature of the solar collector 51 is obtained. Based on the state, it is confirmed whether or not the conditions for the solar heat collection operation are available (step 40). If the conditions are satisfied, the heat pump heat collection operation is stopped and a switching command to the solar heat collection operation is issued (step 40). 41), proceed to step 12 to start boiling by solar heat collection operation.

If the conditions of the solar heat collecting operation are not satisfied in step 40, the boiling in the heat pump heat collecting operation is continued while confirming the recovery of the conditions of the solar heat collecting operation (step 42). When the conditions of the solar heat collecting operation are recovered, the process proceeds to step 41 to shift to boiling by the solar heat collecting operation, and when the temperature reaches the set temperature, the process proceeds to step 38 to stop the heat pump heat collecting operation.

If the remaining amount of hot water in the hot water storage tank 11 is equal to or more than the predetermined amount in step 8, the process proceeds to step 31 and the same processing as in the summer mode is performed without performing boiling in the first time zone. I do.

Processing not described in the winter mode or the spring-autumn mode is performed in the same manner as in the summer mode.

Next, a case will be described in which the boiling increase is set in the standard boiling operation mode (the same applies to all of the summer mode, the winter mode, and the spring-autumn mode).

When the set temperature is reached in any of the summer mode, the winter mode and the spring-autumn mode, step 19 is reached.
Then, if the boiling is set, the process is started.

It is confirmed whether or not the remaining hot water amount after boiling is equal to or more than a predetermined amount (step 43). When the heated hot water is used and becomes equal to or less than the predetermined amount, the increase in boiling by the heat pump heat collecting operation is started (step 44). ). For example, hot water storage tank 11 over 300 liters boiling
In the case of, if there is more than 60 liters of hot water, it is determined that the amount is less than the predetermined amount. The allowable set amount is appropriately determined depending on the capacity of the heat pump heat collecting operation. However, as long as the time required for the boiling increase is sufficient for boiling up within approximately one hour, it is necessary from the viewpoint of actual use. There is no shortage of hot water.

During the boiling by the heat pump heat collecting operation, whether the boiling temperature has reached the set boiling temperature (step 45) or within the allowable boiling time until 24:00 when the boiling is permitted (step 4).
Check 6).

When the boiling temperature is reached, the heat pump heat collection operation is stopped (step 47).
Check the remaining hot water volume in the furnace and check if it is within the allowable boiling time (step
48), it is confirmed whether or not the boiling increase setting is canceled (step 49).

If the remaining hot water amount falls below the predetermined amount within the allowable boiling time, the boiling is performed any number of times. If the allowable boiling time has elapsed in steps 46 and 48, the setting of the boiling is set. However, the process does not perform the boiling process until the process proceeds to step 2 and enters the first time zone of the next day. This is 24:
Even if boiling is performed during the time period after 00, heat loss such as loss of heat dissipation when water is not used and wasteful use of solar heat collection operation conditions on the next day cannot be used effectively even if conditions are met. Care is taken to address problems that are likely to occur.

If it is determined in step 49 that the boiling setting has been canceled, the process returns to step 2.

Next, the case where the early boiling operation mode is set will be described. However, it is assumed that the boiling is not set.

In the early boiling operation mode, the boiling is performed only once starting at 7:00 when the first time zone has started on the day of the start.

At the starting point, when it is confirmed in step 4 that the remaining amount of hot water in the hot water storage tank 11 is equal to or less than a predetermined amount, and in step 5 that the early boiling operation mode is set, once in the early boiling operation mode on the same day, It is checked whether or not only boiling is performed (step 50), and if not, early boiling by the heat pump heat collecting operation is started (step 51).

During the heating by the heat pump heat collecting operation, it is confirmed whether the heating to the set temperature has been achieved (step 52). If the heating to the set temperature has been achieved, the heat pump heat collecting operation is stopped (step 53). Proceed to 2.

When it is confirmed in step 4 that the remaining hot water amount in the hot water storage tank 11 has become equal to or less than a predetermined amount before the current time enters the first time zone, the process proceeds to step 50, but only once on the current day. Since the boiling has already been performed, it is confirmed that the boiling is not set (step 54), and the process returns to step 2.

When the current time enters the first time zone in step 2, it is confirmed through steps 6 and 7 whether the early boiling operation mode is set (step 55).

If the early boiling operation mode is set,
Check whether the remaining amount of hot water in hot water storage tank 11 is equal to or greater than a predetermined amount (Step 5
6). For example, in the case of a hot water storage tank 11 boiling 300 liters,
If more than 60 liters of hot and cold water is used, it is determined that the amount is equal to or less than the predetermined amount, and boiling by the heat pump heat collecting operation is started (step 57).

During the heating by the heat pump heat collecting operation, it is confirmed whether the heating to the set temperature has been achieved (step 58). If the heating to the set temperature has been achieved, the heat pump heat collecting operation is stopped (step 59).

In the early boiling operation mode, the heating operation is limited to the one-time heating operation on the day starting from the first time zone. If there is no setting for increasing the boiling temperature (step 60), the operation is switched from the early heating operation mode to another operation mode. If the operation mode has been switched to the operation mode (step 61), the process proceeds to step 2 and proceeds to the next day.

Here, when the increase in boiling water is set (step 62), it is checked whether the remaining hot water amount after boiling is equal to or more than a predetermined amount (step 63). As long as the boiling is set, if a predetermined amount of hot and cold water is used, the boiling is continued to compensate for the use.

Next, the case where the boiling increase is set in the early boiling operation mode will be described.

After confirming that the amount of residual hot water after boiling through steps 4, 5, and 50 has become equal to or less than a predetermined amount, and confirming that the increase in boiling water has been set in step 54, or in step 60 While confirming that the boiling is set, and confirming in step 63 that the remaining hot water amount after boiling has become equal to or less than a predetermined amount, the process proceeds to step 64 and enters the boiling increasing process in the early boiling operation mode. .

Boiling is started by the heat pump heat collecting operation (step 64). During the heating by the heat pump heat collecting operation, it is confirmed whether or not the boiling set temperature has been reached (step 6).
5) If the boiling temperature is reached, the heat pump heat collection operation is stopped (step 66).

After boiling, it is confirmed whether the first time zone has been reached (step 67), whether the boiling increase setting has been canceled (step 68), and whether the remaining hot water in the hot water storage tank 11 is equal to or more than a predetermined amount. (Step 69) is performed.

When the first time period is reached in step 67, the process proceeds to step 6 described above.

If the setting of the increase in boiling water has been canceled in step 68, and if the remaining amount of hot water in the hot water storage tank 11 has become equal to or less than the predetermined amount in step 69, the process proceeds to step 2 described above.

Next, a case where the solar heating mode is set will be described. However, it is assumed that the boiling is not set.

This solar boiling operation mode is easily affected by the weather, but can make maximum use of the solar heat collection operation that can reduce the power consumption when the weather in summer is stabilized.

When the current time enters the first time zone in step 2, the monitoring of the temperature of the solar collector 51 is started (step 6), and the solar boiling operation mode is set through steps 7 and 55. Make sure that

Until the first time period elapses (step
70), and confirm that the operation mode has been switched (Step 7)
1) If the operation mode is switched, the above-described step 7 is performed.
Proceed to.

When the first time period elapses, that is, when it enters the second time period, which is a sunshine time period, it is checked whether the remaining amount of hot water in the hot water storage tank 11 is equal to or more than a predetermined amount (step 72). , The daylight hours (the third time period ends 1
7:00) (step 73).

If the amount of remaining hot water in the hot water storage tank 11 is equal to or less than the predetermined amount, it is confirmed whether or not the conditions for enabling the solar heat collecting operation are based on the sunshine state corresponding to the temperature of the solar heat collector 51 (step 74). If the conditions are satisfied, the boiling by the solar heat collecting operation is started (step 75).

During boiling by the solar heat collecting operation,
It is checked whether the upper limit temperature of the solar heat collection (55 ° C.) has been reached (step 76) or whether the conditions for the solar heat collection operation are satisfied (step 77).

If the remaining hot water boiled in the hot water storage tank 11 is 1/3 or more, the solar heat collecting operation is performed under the condition that the solar heat collecting operation is always satisfied during the sunshine hours. Boiling at the upper limit temperature (55 ° C.) is possible, and if boiling is achieved, the solar heat collecting operation is stopped (step 78), and the process proceeds to step 19 described above.

If the condition of the solar heat collecting operation is not satisfied in step 77, the solar heat collecting operation is temporarily stopped (step 79), and the process proceeds to step 74 to wait for the recovery of the condition. If the condition is recovered, the routine proceeds to step 75, in which boiling by the solar heat collecting operation is started.

If the sunshine time period elapses in step 73 while the remaining hot water amount is maintained at or above the predetermined amount, or if the sunshine time period elapses in step 74 without recovering the conditions of the solar heat collecting operation (step 80). Then, the process proceeds to step 19 described above.

It is unlikely that the conditions for achieving the boiling point at the solar heat collecting upper limit temperature (55 ° C.) are sufficiently established, but even when the temperature is low (55 ° C. or less) at which the boiling is insufficient, it can be sufficiently used depending on the season.

Next, the case where the boiling increase is set in the solar heating operation mode will be described.

After the boiling by the solar heat collecting operation is completed in step 78, and after the sunshine period has elapsed in steps 73 and 80, the process proceeds to step 19, and if the boiling is set, the boiling process is started. .

Boiling increased after sunshine hours, that is, at 17:00.
Thereafter, the process is executed within the allowable boiling time, ie, at 24:00.

When it is desired to obtain a standard (55 ° C.) boiling temperature when the heating is not performed only by the solar heat collecting operation, the combined operation cannot be performed during the sunshine hours. Thereby, the temperature can be raised to the standard (55 ° C.) boiling temperature, and it can be used even in the summer season, and the number of options increases and convenience is improved.

In the solar heat collecting operation, it is possible to change the operation mode from another operation mode in the middle of the sunshine hours, and the range of use is widened. For example, in the morning, the operation was started in the standard mode, but when the use of hot and cold water on the day is not clear, and when the weather is stable, it is set to the boiling only by the solar heat collection operation, and the boiling is reset. The above waste can be minimized.

Next, a case where the operation mode has been changed halfway will be described.

If the operation mode is switched to another mode during the standby until the first time period, the switching of the operation mode is confirmed in step 3. Alternatively, if the operation mode is switched to another mode during the execution of each mode, the process proceeds to step 2 and then the switching of the operation mode is confirmed in step 3.

It is confirmed whether the operation mode is switched after the set temperature has been reached (step 81). If the set temperature has not been achieved, it is checked whether the operation is in the other mode (step 82). If the operation is in progress, the boiling operation is stopped (step 83).

It is confirmed whether or not there is a boiling increase setting (step 84).
If there is a boost setting, check if it is in the boost operation (step 85),
If the boiling operation is in progress, stop the boiling operation (step 8
6). Thereafter, the process proceeds to step 7 and enters the process of the switched operation mode.

As described above, the function of the operation control means of the main control unit 72 allows the heat pump heat collection operation to be performed in the first time period, and the solar power collection operation is performed in the second time period following the first time period. In order to allow one of the heat collection operation and the heat pump heat collection operation to be performed and to allow the heat pump heat collection operation to be performed in a third time period following the second time period, for example, the solar collection method is performed in a season other than summer. Even when the condition of the heat operation is not satisfied and the compressor having a small compression capacity is used, the rated capacity of the compressor 32 is maximized in each time zone, and at least by the evening in the third time zone. As long as there is no fluctuation due to the use of hot water in the middle of boiling, it is possible to reliably store hot water at the set temperature in the hot water storage tank 11, and therefore,
Convenience in using hot and cold water can be improved along with the reduction in product cost.

Further, the first time period is set to a short time in the morning,
The time zone can be appropriately proportionally set in consideration of the sunshine situation and hot water usage, such as several hours mainly in the morning and several hours until evening in the third time zone.

Further, since the third time zone includes a time zone including the night after the evening, the boiling time is delayed by that much in response to the fluctuation due to the use of hot water during the boiling. Can also be heated.

In the first time period, the heat pump heat collecting operation is allowed to be executed based on the amount of hot water in the hot water storage tank 11, and in the second time period, the solar heat collecting operation is prioritized based on the sunshine state. In order to allow one of the operation and the heat pump heat collection operation to be performed, and to allow the heat pump heat collection operation to be performed regardless of the sunshine state in the third time zone, the solar heat collection operation is prioritized and the heat pump heat collection operation is performed. Even if the compressor 32 having a small compression capacity during the heat operation is used, hot water at the set temperature is obtained by the target time, so that power consumption in the heat pump heat collection operation can be suppressed and energy can be saved.

When the feedwater temperature is lower than a predetermined temperature,
In order to allow the heat pump heat collection operation to be performed in the first time zone in advance, even in seasons when heat collection efficiency is reduced other than in summer, the heat is not affected by the weather and the temperature is settled by the time when the set temperature and the target hot water usage increase. Can store hot water.

When the increase in boiling water is set, the temperature of the hot water in the hot water storage tank 11 is raised to the set temperature by one of the heat pump heat collecting operation and the solar heat collecting operation or an alternate operation thereof. In the following case, the boiling water is increased by the heat pump heat collecting operation, so that the required amount of the hot water can be secured and the convenience in using the hot water can be improved.

Further, in order to prohibit the execution of the boiling increase by the heat pump heat collecting operation in the time period from the lapse of a predetermined time continuing in the third time period to the start of the first time period on the next day, Even if the setting is kept, the unnecessary increase is suppressed, and the trouble of the setting release operation is not accompanied, and the energy can be saved by succeeding the effective use by the solar heat collection on the next day.

When the early boiling operation mode is set, the boiling operation is limited to the heat pump heat collection operation regardless of the time zone. It can be secured in a shorter time than in the boiling operation mode, and the convenience in using hot and cold water can be improved.

Further, when the solar heating mode is set, the heating operation is limited to the solar heat collecting operation only during the sunshine hours, so that the solar heat whose power consumption burden is reduced is reduced. Maximize utilization and save energy.

When the early boiling operation mode is set, the execution of boiling is limited to the heat pump heat collecting operation regardless of the time zone, and when the solar heating operation mode is set, In order to allow boiling operation limited to solar heat collection operation only during the sunshine hours, the required amount of hot water can be secured in one of the heat collection operations according to the user's purpose of use, and hot water is used. The above convenience can be improved, and energy can be saved.

When the early boiling operation mode is set, once a day boiling is permitted based on a predetermined operation start time (7:00), waste is added in addition to short-time boiling. High boiling can be suppressed.

Further, when the boiling is set in combination with the early boiling operation, the amount of hot water is reduced to a predetermined amount or less from the time when the water in the hot water storage tank 11 is heated to the set temperature until the start of operation on the next day. Since the boiling is increased by the heat pump heat collection operation every time, the required amount of hot water can be increased at any time without being restricted by the time zone, and the convenience in using hot and cold water can be improved.

In addition, since the temperature of the hot water at the time of boiling is set to be equal to or lower than the temperature of the hot water on the low temperature side which can be set with the hot water temperature setting button 94, the coefficient of performance (COP) at the time of boiling is improved, and this occurs at the high temperature boiling A decrease in heat exchange efficiency can be suppressed.

The boiling may be increased in conjunction with a plurality of set temperatures (high, standard). However, since the boiling is increased (additional heating) after the set temperature is increased. In order to improve the coefficient of performance (COP) of the heat pump heat collection operation, the increase in boiling temperature in a high temperature range also lowers the heat exchange efficiency, so that a low temperature in a range of, for example, 45 to 55 ° C. which does not hinder bathing. If the boiling is increased in the region, the burden on the power consumption is reduced, and there is an advantage that the energy saving operation can be realized thereby, and a more desirable one can be provided.

When the boiling is set in combination with the solar heat collecting operation, if the boiling is not completed by the end of the third time period, the heat pump heat collecting operation is performed to set a predetermined temperature. Since the heating is performed until the temperature rises, the required amount of hot water can be secured by compensating for the shortage of boiling, and the convenience in using hot and cold water can be improved.

Further, another hot water heater may be used in combination with the hot water storage type hot water supply apparatus of the above embodiment.

[0165]

According to the first aspect of the present invention, the operation control means allows the heat pump heat collection operation to be performed during the first time period and the second time period following the first time period. In order to allow any one of the solar heat collection operation and the heat pump heat collection operation to be performed in the time zone, and to allow the heat pump heat collection operation to be performed in the third time period following the second time period,
For example, even when the conditions of the solar heat collecting operation are not satisfied in a season other than summer and a compressor having a small compression capacity is used, the rated capacity of the compressor is maximized in each time zone, and at least the third By the evening of the time zone, as long as there is no fluctuation due to the use of hot water during the boiling process, the hot water of the set temperature can be reliably stored in the hot water storage tank,
Convenience in using hot and cold water can be improved along with the reduction in product cost.

According to the hot water supply type hot water supply device of the second aspect,
In addition to the effects of the hot water supply type hot water supply device according to claim 1, the first time period is a short time in the morning, the second time period is several hours mainly in the morning, and the third time period is until evening. For example, several hours can be set appropriately in consideration of the sunshine condition and the use condition of hot water.

According to the hot water storage type hot water supply device of the third aspect,
In addition to the effect of the hot water storage type hot water supply device according to claim 1 or 2, since the third time zone includes a time zone including the night after the evening, it can cope with fluctuations due to hot water usage during boiling. Then, the boiling time can be increased even if delayed.

[0168] According to the hot water storage type hot water supply apparatus of claim 4,
In addition to the effect of the hot water storage type hot water supply device according to any one of claims 1 to 3, execution of the heat pump heat collection operation is allowed in advance based on the amount of hot water in the hot water tank in the first time zone, and sunlight is provided in the second time zone. Priority is given to the solar heat collecting operation based on the state, and either the solar heat collecting operation or the heat pump heat collecting operation or the alternate operation thereof is permitted, and the heat pump heat collecting operation is performed in the third time zone regardless of the sunshine state. In order to allow the execution of the heat pump operation, priority is given to the solar heat collection operation, and even if a compressor having a small compression capacity during the heat pump heat collection operation is used, hot water at the set temperature can be obtained by the target time. Power consumption during thermal operation can be suppressed, and energy can be saved.

According to the hot water storage type hot water supply apparatus of claim 5,
In addition to the effect of the hot water storage type hot water supply device according to any one of claims 1 to 4, if the supply water temperature is equal to or lower than a predetermined temperature, the heat pump heat collection operation is allowed to be executed in the first time zone in advance, so Even in the season in which the heat collecting efficiency is reduced, the hot water can be reliably stored by the time when the set temperature and the target amount of hot water use increase without being influenced by the weather.

According to the hot water storage type hot water supply apparatus of claim 6,
In addition to the effect of the hot water storage type hot water supply device according to any one of claims 1 to 5, when the increase in boiling is set, one of the heat pump heat collection operation and the solar heat collection operation or the alternate operation thereof causes the inside of the hot water storage tank to be heated. After boiling the water to the set temperature, if the amount of hot water falls below a predetermined amount of water, in order to execute the boiling by the heat pump heat collection operation, ensure the required amount of boiling water,
Convenience in using hot and cold water can be improved.

[0171] According to the hot water storage type hot water supply apparatus of claim 7,
In addition to the effect of the hot water storage type hot water supply device according to claim 6, the boiling by the heat pump heat collecting operation in a time zone after a predetermined time continuing in the third time zone and before entering the first time zone of the next day. Since the increase of the temperature is prohibited, even if the boiling is set, the excess boiling is suppressed more than necessary. Energy can be achieved.

According to the hot water storage type hot water supply apparatus of claim 8,
In addition to the effect of the hot water storage type hot water supply device according to any one of claims 1 to 5, when the early boiling operation mode is set, the execution of boiling is limited to the heat pump heat collection operation regardless of the time zone. Therefore, the amount of hot water at the set temperature requiring boiling can be secured in a shorter time than in the normal boiling operation mode, and the convenience in using hot and cold water can be improved.

According to the hot water storage type hot water supply apparatus of claim 9,
In addition to the effect of the hot water storage type hot water supply device according to any one of claims 1 to 5, when the solar heating operation mode is set, the heating operation is limited to the solar heat collecting operation only during the sunshine hours. Therefore, energy can be saved by maximizing the use of solar heat, which reduces the burden of power consumption.

According to the hot water storage type hot water supply device of the tenth aspect, in addition to the effect of the hot water storage type hot water supply device of any one of the first to fifth aspects, if the early boiling operation mode is set, the hot water storage type hot water supply device can be operated regardless of the time zone. When the solar heat collection operation mode is set, only the heat pump heat collection operation is allowed, and the heating operation is limited to the solar heat collection operation only during the sunshine hours. Therefore, in accordance with the purpose of use of the user, the required amount of hot water can be secured by either one of the heat collection operations, and the convenience in using hot and cold water can be improved, and energy can be saved and the convenience in use is improved. Can be improved.

According to the hot water supply type water heater of the eleventh aspect, in addition to the effect of the hot water supply type hot water supply device of the eighth or tenth aspect, when the early boiling operation mode is set, a predetermined operation start start time is set. Is allowed once a day on the basis of the above, so that unnecessary boiling can be suppressed in addition to short-time boiling.

According to the hot water supply type hot water supply apparatus of the twelfth aspect, in addition to the effect of the hot water supply type hot water supply apparatus of the eleventh aspect,
When the increase in boiling water is set, the boiling water is increased by the heat pump heat collection operation every time the amount of hot water becomes equal to or less than the predetermined amount of water from the time when the hot water in the hot water tank is heated to the set temperature and the operation start start time on the next day. Therefore, the required amount of hot water can be increased at any time without being restricted by the time zone, and the convenience in using hot and cold water can be improved.

According to the hot water storage type hot water supply apparatus of the thirteenth aspect, in addition to the effect of the hot water storage type hot water supply apparatus of any one of the sixth, seventh and twelfth aspects, the hot water temperature at the time of boiling increase is set by the hot water temperature setting means. Since the temperature of the hot water on the low temperature side is set to be lower than the allowable value, the coefficient of performance at the time of boiling increase can be improved, and a decrease in heat exchange efficiency occurring at the time of high temperature boiling can be suppressed.

According to the hot water storage type hot water supply device of the fourteenth aspect, in addition to the effect of the hot water storage type hot water supply device of the ninth aspect, when the boiling is set, the boiling water is heated by the end of the third time zone. If not completed, in order to execute the heating up to a predetermined heating temperature by the heat pump heat collection operation after that,
The required amount of hot water can be secured by compensating for the boiling shortage, and the convenience in using hot water can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hot water supply type hot water supply apparatus according to an embodiment of the present invention.

FIG. 2 is a control block diagram of the hot water storage type hot water supply apparatus.

FIG. 3 is a front view of the remote controller.

FIG. 4 is a timing chart of the above operation mode.

FIG. 5 is a flowchart illustrating a part of the hot water storage operation.

FIG. 6 is a flowchart illustrating a part of the hot water storage operation.

FIG. 7 is a flowchart illustrating a part of the hot water storage operation.

FIG. 8 is a flowchart illustrating a part of the hot water storage operation.

FIG. 9 is a flowchart illustrating a part of the hot water storage operation.

FIG. 10 is a flowchart illustrating a part of the hot water storage operation.

[Explanation of symbols]

23 Remaining hot water detection sensor as hot water detection means 24 Boiling detection sensor as hot water detection means 25 Water supply temperature detection sensor as water supply temperature detection means 31 Heat pump collector 32 Compressor 33 Condenser 35 Evaporator 51 Solar heat collection 56 Three-way valve as switching means 57 Solar heat collector sensor as solar heat collecting temperature detection means 66 Solar heat collecting operation control means 67 Heat pump heat collecting operation control means 72 Main control unit as operation control means 93 Operation mode switching means Operation mode switch button 94 Hot water temperature setting button as hot water temperature setting means 95 Boiling water increase button as boiling water setting means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenshi Irino 180 Furuichi-cho, Maebashi-shi, Gunma Toshiba Equipment Co., Ltd.

Claims (14)

[Claims] 1. A heat pump collector comprising a closed circuit having a compressor, a condenser and an evaporator, a solar collector connected in parallel to the evaporator, the compressor and the condenser Switching means for selectively switching one of the evaporator and the solar heat collector to the vessel,
In a hot-water storage type hot water supply device in which hot water in a hot water tank is heated via a condenser by one of a heat pump heat collecting operation and a solar heat collecting operation, a solar heat collecting operation control for executing the solar heat collecting operation Means, a heat pump heat collection operation control means for executing the heat pump heat collection operation, and a first time period during the daytime from morning to evening, a second time period following the first time period, Proportionally divided into a third time period following the second time period, only the heat pump heat collection operation is allowed to be performed in the first time period, and the solar heat collection operation and the heat pump heat collection operation are performed in the second time period. Operation control means for permitting any one of the operations, and permitting only the heat pump heat collection operation to be executed in the third time period and in a time period subsequent to the third time period. Characterized hot water storage Water heater. 2. The apportioned time zone is characterized in that a second time zone is set longer than the first time zone, and a third time zone is set longer than the second time zone. The hot water supply type hot water supply apparatus according to claim 1, wherein 3. The system according to claim 1, wherein the third time zone includes a time zone including the night after the evening.
The hot water storage type hot water supply device as described. 4. A hot water level detecting means for detecting a hot water quantity in a hot water storage tank, and a solar heat collecting temperature detecting means for detecting a temperature of a solar heat collector, wherein the operation control means operates in the first time zone. The heat pump heat collecting operation is allowed to be executed based on the amount of hot water in the hot water tank detected by the hot water amount detecting means, and the solar power is collected based on the sunshine state corresponding to the temperature detected by the solar heat collecting temperature detecting means in the second time period. Priority is given to the heat collecting operation, and either or both of the solar heat collecting operation and the heat pump heat collecting operation are allowed to be performed, and when the third time zone is entered, the heat pump heat collecting operation is performed regardless of the sunshine state 4. The hot water supply type hot water supply device according to claim 1, wherein continuous execution of the heat pump heat collection operation is permitted. 5. 5. A water supply temperature detecting means for detecting a temperature of water supplied to the hot water storage tank, wherein the operation control means includes a first water supply temperature detecting means for detecting a temperature of the water supply being lower than a predetermined temperature. The hot water storage type hot water supply apparatus according to any one of claims 1 to 4, wherein execution of the heat pump heat collection operation is permitted during the time period of (1). 6. An apparatus according to claim 1, further comprising: means for setting an increase in boiling water; and means for detecting the amount of hot water in the hot water storage tank. After boiling the hot water in the hot water storage tank to a set temperature by one of the heat pump heat collecting operation and the solar heat collecting operation or an alternate operation thereof, when the hot water amount detected by the hot water amount detecting means becomes equal to or less than a predetermined hot water amount, The hot-water storage type hot water supply apparatus according to any one of claims 1 to 5, wherein a boiling increase is performed by a heat pump heat collection operation. 7. The operation control means prohibits the execution of the increase in boiling by the heat pump heat collecting operation in a time period after a predetermined time period continuing in the third time period and before entering the first time period of the next day. 7. The hot water supply type hot water supply apparatus according to claim 6, wherein 8. An operation mode switching means for setting an early boiling operation mode in which boiling is performed only in the heat pump heat collecting operation, and the operation control means includes an early boiling operation by the operation mode switching means. 6. The method according to claim 1, wherein when the mode is set, the boiling operation is limited to the heat pump heat collecting operation regardless of the first, second, and third time zones.
The hot water storage type hot water supply device according to any of the above. 9. An operation mode switching means for setting a solar heating operation mode in which heating is performed only in the solar heat collecting operation, and the operation control means includes a solar heating operation performed by the operation mode switching means. The hot water supply apparatus according to any one of claims 1 to 5, wherein when the mode is set, the boiling operation is permitted only in the solar heat collecting operation during the sunshine hours. 10. An early boiling operation mode in which heating is performed only in the heat pump heat collecting operation and a solar heating operation mode in which heating is performed only in the solar heat collecting operation are selectively set. Operating mode switching means, the operation control means, when the early boiling operation mode is set by the operation mode switching means, allows the execution of boiling limited to the heat pump heat collection operation regardless of the time zone, Further, when the solar heat collecting operation mode is set, the heating operation is limited to the solar heat collecting operation only during the daylight hours during the day including the morning of the day. Or 5
The hot water storage type hot water supply device according to any of the above. 11. The operation control means, wherein when the early boiling operation mode is set by the operation mode switching means, the set temperature heating once a day is permitted based on a predetermined operation start start time. The hot water storage type hot water supply device according to claim 8 or 10, wherein 12. An apparatus according to claim 1, further comprising: a boiling increase setting means for setting a boiling increase; and a hot water amount detecting means for detecting a hot water amount in the hot water storage tank. When the boiling increase is set by the boiling increase setting means, after the hot water in the hot water storage tank is heated to the set temperature and before the operation start starting time of the next day, the hot water quantity detected by the hot water quantity detecting means becomes equal to or less than a predetermined hot water quantity. The hot-water storage type hot water supply apparatus according to claim 11, wherein when the temperature decreases, the boiling is increased by a heat pump heat collecting operation. 13. A hot water temperature setting means for setting a boiling hot water temperature, wherein the operation control means sets the hot water temperature at the time of boiling increase to a low temperature side hot water temperature below which the hot water temperature setting means can set the hot water temperature. 13. The hot water supply type hot water supply apparatus according to claim 6, wherein the increase is performed. 14. An apparatus according to claim 1, further comprising: an increase setting means for setting an increase in boiling water; and an increase detection means for detecting an increase in the amount of hot water in the hot water storage tank. When the boiling increase is set by the boiling increase setting means under the condition, if the boiling temperature is not detected by the boiling detection means by the end of the third time zone, the predetermined temperature increase by the heat pump heat collection operation is performed. The hot-water storage type hot-water supply device according to claim 9, wherein heating to a temperature is performed.