JPH0539957A - Hot water feeding, cooling and heating device - Google Patents

Abstract

PURPOSE:To provide a substantial reduction of a manufacturing cost or an installing cost, set a substantial small-sized device and reduce a running cost as much as possible by a method wherein a triple-layered pipe type heat exchanging coil of a water heat exchanger is wound around a heat accumulating hot water storing tank. CONSTITUTION:A plurality of turns of triple-layered heat exchanging coil Z for a water heat exchanger are wound around an upper outer circumference of a hot water storing tank 7 and installed there. The triple-layered heat exchanging coil Z is constructed such that water heat exchangers and heat transfer pipes are arranged outside and inside a refrigerant pipe disposed at the water heat exchangers, and a hot water feeding and circulating circuit and a bath circulation circuit are completely independent with a refrigerant flow passage of one system being held therebetween. One heat pump device provides main seven functions of a hot water feeding, a cooling and hot water feeding, an air heating and hot water feeding, a cooling and a bath additional boiling, a heating and a bath additional boiling, (a temperature keeping), a cooling and a heating. Heat radiation while the hot water fed out of an outlet of the water heat exchanger is returned back to an upper part of a hot water storing tank for accumulating heat can be restricted as much as possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type hot water supply / cooling system, and more particularly to minimizing heat radiation while returning high temperature water discharged from the outlet of a water heat exchanger to the upper part of a hot water storage tank. The present invention relates to a hot water supply / cooling system.

[0002]

2. Description of the Related Art Conventionally, it is necessary to store hot water by utilizing cooling and exhausting heat of a heat pump type hot water supply / cooling system, and to request operation of heating and hot water supply by using a heater inside a hot water storage tank connected to a hot water supply circuit as an auxiliary heat source. A hot water supply air conditioner configured to perform all of the above is known, but this conventional heat pump hot water supply air conditioner has many problems as described below.

That is, in the above-mentioned conventional heat pump hot water supply / cooling system, when a heating heater is built in the hot water storage tank and the heating heater is used to supply hot water at the same time as the heat pump heating operation, a temperature suitable for hot water supply is reached. When heated,
The heat pump hot water supply operation is overloaded (the water entering temperature becomes high), and as a result, there is a problem that the heat pump hot water supply cannot be performed efficiently in the winter.

Therefore, in response to a request for simultaneous heating and hot water supply in winter, a heater for daytime and daytime and a heater for late-night power are conventionally built in the hot water storage tank, and the heat pump is given priority to heating only to raise hot water. On the other hand, it is the current situation that heating and hot water supply are executed by using an auxiliary heat source, but such a method has a problem that energy efficiency is lowered.

Further, in the above-mentioned conventional heat pump hot water supply air conditioner, apart from the summer season when bath shower / kitchen hot water / bath hot water is the main, the temperature of the incoming water decreases as the outside air temperature decreases. In the winter when a large amount of heat load is required, including hot water supply for baths, high-temperature heat storage up to around 85 ° C. is required as in the conventional ordinary electric water heater and boiler water heater. In addition, it is becoming very difficult to cover the maximum hot water supply load in winter with a conventional 370 to 470l class large amount heat storage system as well as to save the installation space.

For example, in order to cover the total hot water supply load corresponding to the daily hot water supply load of a standard household (family of 4 to 5 people) with a small (about 200 to 250 l) heat storage amount, heating and hot water supply operation in winter and conventional The hot-water reheating operation (heat retention), which was not found in the hot-water supply / cooling system of the above, is especially required, and high-temperature heat storage of about 85 ° C by the auxiliary heating device (heater, etc.) during the midnight power time zone and the hourly light charge time zone Is required.

However, since the conventional selection timing of the auxiliary heater is controlled manually or by detecting the outside air temperature, the auxiliary heater in the lower part of the hot water tank is unnecessarily operated to lower the operation efficiency, or the outside efficiency is low. There was a problem that the amount of hot water was insufficient when the temperature was high. on the other hand,
When selecting by outside air temperature, specified time (midnight power time, time by time zone), or remaining hot water amount detection, the hot water amount is guaranteed, but even if the heat pump hot water supply operation is possible in time, it will be unnecessarily assisted. The heater is operated. That is, there is a problem that the timing of selecting the heat pump operation or the auxiliary heater operation is not controlled in terms of efficiency.

Further, in the conventional heat pump hot water supply / cooling system described above, if it is possible to satisfy all the hot water supply load only by the heat pump operation heating mainly in summer, it has been conventionally said that a great energy saving is achieved. This is theoretically sufficient if exhaust heat from the cooling operation is used, but in reality, the timing of the cooling operation and the hot water storage timing that matches the hot water supply load do not mesh well, and even during the summer season The hot water supply alone operation (refrigeration cycle operation that does not use exhaust heat) or the auxiliary heater operation during the operation stop is frequently performed, so that there is a problem that energy saving is not so much.

Further, in the heat storage method in the above-mentioned conventional heat pump hot water supply / cooling system, a heat exchanger directly inserted in the hot water storage tank is used to gradually heat at a uniform temperature, and heat exchange is performed by forced circulation vs. alternating current. There is a system in which the water heater is installed outside the can in the hot water storage tank, the former cannot obtain a hot water temperature higher than the condensation temperature, and the latter has a circulating water flow rate so that the hot water outlet temperature of the heating heat exchanger reaches the specified temperature. Had to be adjusted.

That is, in the latter method, the conventional mechanical type condensing pressure adjusting valve / wax element type utilizing paraffin wax pellets, or the thermistor element at the heat exchange outlet is used for pump discharge. There are those that control the capacity, or those that control the proportional valve opening by using a thermistor element at the heat exchange outlet, but in any of these methods, the hot water temperature cannot be changed. There are many problems such as that the accuracy of variable flow rate is not good, the time lag of tapping temperature and proportional valve operation, or the ability to follow the state change on the heat exchange condensation side (water heat exchange side) are poor. In the case of proportional valve control by hot water temperature, due to hot keeping (heat exchanger preheat operation) and temperature detection delay, the specified temperature is reached especially in the season when the outside air temperature and the incoming water temperature are low. In many cases accompanied by hunting on in, we had a problem.

The present invention was devised in view of the present situation, and the purpose thereof is to provide hot water supply / cooling hot water supply / heating hot water supply / cooling bath reheating / heating bath reheating by one heat pump device ( Provides hot water supply cooling / heating equipment that has seven main functions of heat retention / cooling / heating, and can greatly reduce various equipment costs, as well as reduce equipment size and energy conversion efficiency. Is what you are trying to do.

[0012]

In order to achieve the above object, in the present invention, a compressor, an evaporator, a load air side condenser, a heat source side water heat exchanger and an expansion mechanism are provided in a refrigerant pipeline. A hot water supply / cooling device comprising: a heat pump cycle heating device connected in communication; a heat storage hot water storage tank to which the water heat exchanger is connected; and an auxiliary heating device that heats the water in the hot water storage tank. A triple-tube heat exchange coil of a water heat exchanger is wound around and attached to the hot water storage tank for heat storage.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on an embodiment shown in the accompanying drawings.

In FIGS. 1 and 2, B is a bathtub and I is
Is an indoor unit, K is a hot water supply kit, O is an outdoor unit, Q is a hot water storage unit, WV ₁ , WV ₂ , W
V ₃ is a 4-way switching valve, SV ₁ , SV ₂ and SV ₃ are solenoid valves, SV ₄ is a multifunctional expansion valve, P _{1 to} P ₂₂ are refrigerant pipes, Y _{1 to} Y ₄ are bath circulation pipes. 1, 1 is an outdoor heat exchanger, 2 is an indoor heat exchanger, 3 is a compressor, 4
Is a water heat exchanger, 5 is a receiver, 6 is a check valve, 7 is a hot water storage tank, 8 is an expansion mechanism, 9 is a hot water supply pump, and 10 is a bath circulation pump. Incidentally, in FIG. 1, reference numeral C indicates a wireless remote controller for an indoor unit,
D is a hot water supply remote control, and E is a bath remote control.
Further, in each figure, the white part of the valve indicates that each valve is open, and the black part indicates that
It means that each valve is set to the closed state

Further, a triple pipe heat exchange coil Z of the water heat exchanger 4 is wound around and mounted on the outer periphery of the upper portion of the hot water storage tank 7. This triple-tube heat exchange coil Z is provided with water heat exchange / heat transfer tubes on the outside and inside of the refrigerant pipe arranged in the water heat exchanger 4, and has a hot water supply circulation circuit and a bath circulation circuit.
The system is completely independent with the system coolant passage interposed therebetween, and its detailed configuration, action, and the like are known, and therefore detailed description thereof is omitted here.

Next, the operating state of the hot water supply / cooling system constructed as above will be described.

[0017] Selecting "cooling operation mode" in the hot water supply air conditioner according to this embodiment, as shown by thick lines in FIG. 3, the refrigerant pipe becomes high pressure compressor 3 P ₁ →
The four-way switching valve WV ₁ → Piping P ₂ → Outdoor heat exchanger 1 → Piping P ₁₂ enters the multifunctional expansion valve SV ₄ , and after the multifunctional expansion valve SV ₄ is reduced in pressure, the refrigerant is cooled. Piping P ₅
→ Piping P ₆ → Indoor heat exchanger 2 → Piping P ₇ → Piping P ₈ → 4
Direction switching valve WV ₂ → Piping P ₁₃ → 4 direction switching valve WV ₁ →
The cold air is sent out from the indoor heat exchanger 2 by returning to the compressor 3 through the pipe P ₁₇ → the pipe P ₁₁ .

On the other hand, when the "heating operation mode" is selected in the hot water supply / cooling system, the refrigerant having a high pressure in the compressor 3 is pipe P ₁ → four-way switching valve WV ₁ → pipe P, as indicated by the thick line in FIG. ₁₃ → 4 direction switching valve WV ₂ → Piping P ₁₄ → Piping P ₇ → Indoor heat exchanger 2 → Piping P ₆ → Piping P
₁₅ → Receiver 5 → Multi-function expansion valve SV via piping P _16
4 and after being made a low pressure by this expansion valve SV ₄ , the refrigerant is pipe P ₄ → solenoid valve SV ₁ → pipe P ₃ → outdoor heat exchanger 1 → pipe P ₂ → four-way switching valve WV ₁ → The warm air is sent out from the indoor heat exchanger 2 by being returned to the compressor 3 via the pipe P ₁₇ → the pipe P ₁₁ .

[Hot water supply operation mode] in the hot water supply cooling and heating device
5 is selected, the refrigerant having a high pressure in the compressor 3, as shown by the thick line in FIG. 5, is converted into the pipe P ₁ → the four-way switching valve WV 1 → the pipe P ₁₃ → the four-way switching valve WV ₂ → the pipe P.
₁₈ → After entering the water heat exchanger 4 via the pipe P ₁₉ and heating the hot water supply circulating in the hot water supply circulation pipe Y ₃ by the water heat exchanger 4, the refrigerant is piped P ₂₀ → pipe P ₂₁ → 4 After entering the multifunctional expansion valve SV ₄ via the direction switching valve WV ₃ → pipe P ₂₂ and reducing the pressure to a low pressure by the expansion valve SV ₄ , the refrigerant is pipe P ₄ → solenoid valve SV ₁ → pipe P ₃ → outdoor It is returned to the compressor 3 via the heat exchanger 1 → the pipe P ₂ → the four-way switching valve WV ₁ → the pipe P ₁₇ → the pipe P ₁₁ . Further, when the hot-water supply circulating in the hot-water supply circulation pipe Y ₃ is heated by the water heat exchanger 4 by the refrigerant, the heated high-temperature hot water is stored in the hot-water storage tank 7
Heat accumulated is sent f, while the hot water can be supplied to the bus kitchen sanitary etc., water cooled by water supply to the hot water tank 7 through the hot water circulation pipe Y ₂ from the lower portion of the hot water tank 7 Water It is returned to the heat exchanger 4 and reheated.

When the "bath heating operation mode" is selected in the hot water supply / cooling device, as shown by the thick line in FIG.
The high-pressure refrigerant in the compressor 3 enters the water heat exchanger 4 through the pipe P ₁ → 4-way switching valve WV ₁ → pipe P ₁₃ → 4-way switching valve WV ₂ → pipe P ₁₈ → pipe P ₁₉ and After heating the bath water circulating in the bath circulation pipe Y ₁ by the water heat exchanger 4, the refrigerant is passed through the pipe P ₂₀ → the pipe P ₂₁ → the four-way switching valve WV ₃ → the pipe P ₂₂ and the multifunctional expansion valve described above. SV ₄
After entering into the expansion valve SV ₄ and having a low pressure in the expansion valve SV ₄ , the refrigerant is pipe P ₄ → solenoid valve SV ₁ → pipe P ₃ → outdoor heat exchanger 1
→ Piping P ₂ → 4-way switching valve WV ₁ → Piping P ₁₇ → Piping P
_It is returned to the compressor 3 via ₁₁ . Further, when the bath water circulating in the bath circulation pipe Y ₁ is heated in the water heat exchanger 4 by the refrigerant, the heated hot water is sent to the bath B to stir the bath water. While raising the temperature as a whole, the bath water that is recirculated is returned from the bathtub B to the water heat exchanger 4 via the bath circulation pipe Y ₄ and is reheated, and is repeatedly operated until a predetermined bath water temperature is reached. It

When the "cooling / hot water supply operation mode" is selected in the hot water supply / cooling system, the refrigerant having a high pressure in the compressor 3 becomes a pipe P ₁ → four-way switching valve WV ₁ → pipe P, as shown by a thick line in FIG. ₁₃ → 4 directional control valve WV ₂ → Piping P ₁₈ → Piping P ₁₉ into the water heat exchanger 4, and after heating the hot water circulating in the hot water circulation pipe Y ₃ with the water heat exchanger 4, The refrigerant enters the multi-function expansion valve SV ₄ via the pipe P ₂₀ → the pipe P ₂₁ → the four-way switching valve WV ₃ → the pipe P ₂₂ , and the refrigerant is reduced in pressure by the expansion valve SV ₄ , and then the refrigerant is the pipe P _4. → Solenoid valve SV ₂ → Piping P ₅ → Piping P ₆ → Indoor heat exchanger 2 → Piping P ₇ → Piping P ₈ → Four-way switching valve WV ₂ → Piping P ₉ → Four-way switching valve WV ₃ → Piping P ₁₀ → It is returned to the compressor 3 via the pipe P ₁₁ . Further, the above-mentioned refrigerant heats the hot-water supply circulating in the hot-water supply circulation pipe Y ₃ in the water heat exchanger 4, and the heated high-temperature hot water is sent to the hot-water storage tank 7 for heat storage and the hot water is stored in the bath. While it can be supplied to the kitchen, sanitary, etc., the water cooled by the water supply to the hot water storage tank 7 is returned from the lower part of the hot water storage tank 7 to the water heat exchanger 4 via the hot water supply circulation pipe Y ₂ and reheated.

When the "cooling bath reheating operation mode" is selected in the hot water supply / cooling system, the refrigerant having a high pressure in the compressor 3 becomes a pipe P ₁ →
4-way switching valve WV ₁ → Piping P ₁₃ → 4-way switching valve WV ₂
→ Piping P ₁₈ → Piping P ₁₉ into the water heat exchanger 4,
After the bath water circulating in the bath circulation pipe Y ₃ is heated by the water heat exchanger 4, the refrigerant expands through the pipe P ₂₀ → the pipe P ₂₁ → the four-way switching valve WV ₃ → the pipe P _22. Valve S
After entering V ₄ and reducing the pressure by this expansion valve SV ₄ , the refrigerant is pipe P ₄ → solenoid valve SV ₂ → pipe P ₅ → pipe P ₆ →
Indoor heat exchanger 2 → Piping P ₇ → Piping P ₈ → 4-way switching valve W
It is returned to the compressor 3 via V ₂ → pipe P ₉ → 4-way switching valve WV ₃ → pipe P ₁₀ → pipe P ₁₁ . Further, when the bath water circulating bath circulation pipe Y ₁ with water heat exchanger 4 by the refrigerant is heated, and heating the hot water of the heated high-temperature hot water is sent to the bath B by the bathtub While being heated while being stirred, the bath water that is recirculated is returned from the bathtub B to the water heat exchanger 4 via the bath circulation pipe Y ₄ and reheated to be repeatedly operated until a predetermined bath water temperature is reached.

When the "heating / hot water supply operation mode" is selected in the hot water supply / cooling system, as shown by the thick line in FIG.
The high-pressure refrigerant in the compressor 3 enters the water heat exchanger 4 through the pipe P ₁ → 4-way switching valve WV ₁ → pipe P ₁₃ → 4-way switching valve WV ₂ → pipe P ₁₈ → pipe P ₁₉ and After heating the hot water which circulates in the hot water circulation pipe Y ₃ by the water heat exchanger 4, the refrigerant passes through the pipe P ₂₀ → the pipe P ₂₁ → the four-way switching valve WV _3, and then the pipe P ₂₃ and the pipe P _9. The refrigerant that has been branched to the pipe P ₂₃ is reduced in pressure by the expansion mechanism 8 and then pressure-fed to the pipe P ₃ via the pipe P ₁₂ .
The refrigerant flowing through the pipe P ₉ is a four-way switching valve WV.
₂ → Piping P ₁₄ → Piping P ₈ → Piping P ₇ → Indoor heat exchanger 2
→ Piping P ₆ → Piping P ₁₅ → Receiver 5 → Piping into the multifunctional expansion valve SV ₄ via the piping P _16, and after the expansion valve SV ₄ has reduced the pressure, the refrigerant is piped P ₄ → Solenoid valve SV ₁ → is pumped into the pipe P _3, refrigerant merged in the pipe P _3, after this, the outdoor heat exchanger 1 → pipe P ₂ → 4 directional valve WV ₁
→ Piping P ₁₇ → Returned to the compressor 3 via the piping P ₁₁ . At this time, to prevent a significant decrease in heating capacity,
The refrigerant flowing out of the compressor 3 is connected to the pipe P ₁₈ and the pipe P _24.
Flow partially at the branch point of the solenoid valve SV ₃ → Piping P ₂₅ →
Piping P ₉ → 4-way switching valve WV ₂ → Piping P ₁₄ → Piping P ₈
→ Piping P ₇ → By circulating the refrigerant circulation to the circuit to the indoor heat exchanger 2, a sufficient heating capacity is ensured. In this manner, when the hot water supply circulating in the hot water supply circulation pipe Y ₃ is heated in the water heat exchanger 4 by the refrigerant,
This heated high-temperature hot water is sent to the hot water storage tank 7 to accumulate heat, and the hot water can be supplied to the bath, kitchen, sanitary, etc., while the water cooled by the water supply to the hot water storage tank 7 is stored in the hot water storage tank 7. Through the hot water supply circulation pipe Y ₂ to be returned to the water heat exchanger 4 and reheated.

When the "heating / bath warming operation mode" is selected in the hot water supply / cooling system, the refrigerant having a high pressure in the compressor 3 becomes a pipe P _{1 as} shown by a thick line in FIG.
→ 4-way switching valve WV ₁ → Piping P ₁₃ → 4-way switching valve WV
₂ → Piping P ₁₈ → Piping P ₁₉ into the water heat exchanger 4, and after heating the bath water circulating in the bath circulation pipe Y ₃ with the water heat exchanger 4, the refrigerant is the pipe P ₂₀ → Piping P ₂₁ →
After passing through the four-way switching valve WV ₃ , the pipe P ₂₃ and the pipe P
_The refrigerant that is divided into ₉ and flows through the pipe P ₂₃ is reduced in pressure by the expansion mechanism 8 and then is pumped to the pipe P ₃ through the pipe P ₁₂ and the refrigerant that flows through the pipe P ₉ is switched in four directions. The valve WV ₂ → Piping P ₁₄ → Piping P ₇ → Indoor heat exchanger 2 → Piping P ₆ → Piping P ₁₅ → Receiver 5 → Piping into the multifunctional expansion valve SV ₄ via the piping P ₁₆ and at this expansion valve SV ₄ After being made to have a low pressure, the refrigerant is piped P ₄ → solenoid valve SV ₁ → pipe P ₃
The refrigerant that has been pumped to and merged in the pipe P ₃ is
The heat is returned to the compressor 3 through the outdoor heat exchanger 1 → the pipe P ₂ → the four-way switching valve WV ₁ → the pipe P ₁₇ → the pipe P ₁₁ . At this time, in order to prevent a significant decrease in the heating capacity, the refrigerant discharged from the compressor 3 is caused to partially flow at the branch point of the pipe P ₁₈ and the pipe P ₂₄ , and the solenoid valve SV ₃ → pipe P ₂₅ → pipe P ₉ → 4 direction switching. The valve WV ₂ → pipe P ₁₄ → pipe P ₈ → pipe P ₇ → the refrigerant circulation is bypassed to the circuit to the indoor heat exchanger 2 to ensure sufficient heating capacity. In this way, when the bath water circulating in the bath circulation pipe Y ₁ is heated in the water heat exchanger 4 by the refrigerant, the heated hot water is sent to the bath B, and the hot water in the bath is heated. The temperature of the bathtub water to be recirculated is returned from the bathtub B to the water heat exchanger 4 through the bath circulation pipe Y ₄ to the water heat exchanger 4 and reheated to a predetermined temperature. It is kept warm at the bath water temperature.

In the hot water supply cooling / heating device, the "hot water supply defrost operation mode" or "bath heating defrost operation mode"
11, when the refrigerant having a high pressure in the compressor 3 becomes a pipe P ₁ → 4-way directional control valve WV ₁ → pipe P ₁₃ → 4-way directional control valve WV ₂ → pipe P, as indicated by a thick line in FIG.
₁₈ → Pipe P ₁₉ enters the water heat exchanger 4, and in the water heat exchanger 4, the hot water supply or the bath circulation pump is stopped, so that the refrigerant remains at a high temperature in the pipe P ₂₀ → Pip P ₂₁ → 4 Direction switching valve WV ₃ → multi-function expansion valve SV ₄ via pipe P ₂₂
Enter Since the expansion valve SV ₄ is in a fully open state in the defrost mode and is not depressurized, the refrigerant is pipe P ₄ → solenoid valve SV ₁ → pipe P ₃ → outdoor heat exchanger 1 → pipe P ₂ → 4-way switching valve WV ₁ → pipe P ₁₇ → It is returned to the compressor 3 through the pipe P ₁₁ . At this time, the frost accumulated on the outdoor heat exchanger 1 is removed by the passage of the high-temperature refrigerant. still,
In the "hot water supply defrost operation mode", the fans of the hot water supply pump 9 and the outdoor heat exchanger 1 are stopped, and in the "bath heating defrost operation mode",
The fans of the bath circulation pump 10 and the outdoor heat exchanger 1 are stopped.

Finally, when the "heating defrost operation mode" or the "heating / hot water supply defrost operation mode" or the "heating / bath warming defrost operation mode" is selected in the hot water supply / cooling system, as shown by the thick line in FIG. The high-pressure refrigerant in the compressor 3 is the pipe P ₁ → 4-way switching valve WV ₁ → pipe P ₁₃ → 4-way switching valve WV ₂ → pipe P
₁₄ → Piping P ₇ → Indoor heat exchanger 2 → Piping P ₆ → Piping P
₁₅ → Receiver 5 → Multi-function expansion valve SV via piping P ₁₆
Enter ₄ . Since the expansion valve SV ₄ is fully opened, the high-temperature and high-pressure refrigerant is piped P ₄ → solenoid valve SV ₁ → pipe P ₃ → outdoor heat exchanger 1 → pipe P ₂ → four-way switching valve WV _1.
→ Piping P ₁₇ → Returned to the compressor 3 via the piping P ₁₁ . At this time, the frost formed on the outdoor heat exchanger 1 is removed by the passage of the high-temperature refrigerant. In addition, in these operation modes, the fan of the indoor heat exchanger 2 and the fan of the outdoor heat exchanger 1 are stopped, but if the fan of the indoor heat exchanger 2 is controlled to a low speed, it will defrost simultaneously with heating. You can also do it.

FIG. 13 is a flow chart showing an example of control for each of the above operation modes.

Therefore, in the hot water supply / cooling system according to this embodiment, the assumed load of one room room (so-called one room) of home air conditioning (cooling / heating) is sufficiently covered, and
Especially in the hot water supply load centering on the bath hot water supply load in the winter season, heating to the standard temperature is preferentially performed by operating the heat pump device, and only when high temperature is required,
This can be covered by using an auxiliary heat source heater (not shown) arranged in the lower part of the hot water storage tank 7.

Further, in the hot water supply cooling / heating apparatus according to this embodiment, the operable output and time are determined by the outside air temperature, the amount of hot water in the hot water tank, and the hot water temperature, and the operation of the auxiliary heater operation is minimized in the cheap time zone. Control (peak shift control) can also be performed. This is because the operation of only the heat pump and the operation of the heat pump hot water supply are stopped by the heat pump operation outside air temperature detection sensor (not shown), the amount of remaining hot water in the hot water tank 7 By effectively selecting the efficient heat pump operation that is automatically switched to and controlled, it is possible to significantly improve the total efficiency and guarantee the required amount of hot water even in the winter.

Further, in the hot-water supply / cooling system according to this embodiment, the conventional system is uniformly used up to the reserved amount or the specified amount in the hot-water storage tank even when the cooling is not operating even during the summer. As compared with the case of shifting to the hot water supply operation, the operation control sequence can be controlled so as not to shift to the hot water supply independent operation depending on the condition of the outdoor temperature, the current time zone, or the previous cooling operation time.

For example, as shown in FIG. 14, when the "hot water supply operation mode" or "bath heating operation mode" is selected,
Normally, there is no cooling command, as shown in FIG. 5 and FIG. 6, the hot water supply control microprocessor devices respectively command the individual operation, but in order to maximize the chance of utilizing the cooling air exhaust heat in the cooling operation season, the hot water supply independent It consists of operations that restrict the operation under certain conditions.

In response to a hot water supply request when there is no cooling command, first, the outside air temperature is detected by the temperature sensor, and the hot water supply command is not permitted above a certain temperature. After this,
In the next step, the current time is detected, and the hot water supply command is not permitted within a certain time range. Furthermore, in the next step, in order to prevent accidental careless hot water supply mistakes, it is configured with contents specific to the cooling season so that the operation control that allows the hot water supply command is performed after a certain time has elapsed from the previous cooling operation stop time. There is. This hot water supply request is activated by a request signal from the hot water supply remote controller as shown in FIG. 15, but when the boiling is completed or when the hot water supply operation cancellation function is activated during absence, etc. Is stopped, unnecessary operation can be prevented, and the use of cooling exhaust heat, which was not available in the past, can be used to reheat bath water.
While the available hot water supply capacity can be increased,
It is possible to reduce the capacity of the tank for storing hot water.

Further, in the hot water supply / cooling system according to this embodiment, as shown in FIGS. 16 to 19, the condensation temperature detection sensor 20, the condensation equivalent pressure detection sensor 21, and the hot water temperature sensor on the water heat exchange side are provided. 22 can also be configured so that stable hot water supply / bath reheating can be performed within a predetermined temperature range.

16 to 19, reference numerals 23, 24,
25 is a hot water storage temperature sensor, 26 is a bath hot water temperature sensor, 27 is a bath hot water temperature sensor, 28 is a hot water hot water temperature sensor, 30 is a water level sensor, MV ₁ is a hot water proportional valve,
MV ₂ is a 2-way switching valve for hot water supply, MV ₃ is a bath proportional valve, W
V ₄ is a bath 3-way switching valve, Y _{5 to} Y ₉ are running water pipes,
Z indicates a mixed branch point, respectively.

When the "hot water supply operation" is selected in such a configuration, the water supply / hot water supply circuit causes the cold water supplied to the lower portion of the hot water storage tank 7 by the hot water discharge from the hot water storage tank 7 as shown in FIG. From the lower part of the hot water storage tank 7, the hot water supply circulation pipe Y ₂ → hot water supply pump 9 → hot water supply proportional valve MV ₁ → is sent to the water heat exchanger 4 through the mixing branch point Z and heated by the water heat exchanger 4. The hot water flows through the hot water supply two-way switching valve MV ₂ in the hot water supply circulation pipe Y ₃ and is sent to the hot water storage tank 7, where heat is stored and stored in the bath.
It is set so that it can be supplied to kitchens and sanitaries. At this time, the upper, middle, and lower temperatures in the hot water storage tank 7 are detected by the hot water storage temperature sensors 23, 24, and 25, and the temperature of the water flowing in the hot water supply circulation pipe Y ₂ is detected by the hot water supply and incoming water temperature sensor 28. At the same time, the temperature of the hot water flowing in the hot water supply circulation pipe Y ₃ is measured by the hot water temperature sensor 2
2 and the heating control is stably and efficiently performed by these detected temperatures.

When the "bath reheating (warming) operation mode" is selected, the bath water circulation circuit causes the hot water heated by the water heat exchanger 4 to enter the pipe Y as shown in FIG.
₆ → 3-way switching valve for bath WV ₄ → Bath circulation pump 10 →
Bath proportional valve MV ₃ → bath circulation pipe Y ₁ → is sent to bathtub B to raise the temperature of the bathtub as a whole while stirring, while recirculating bathwater is bathtub B → bath circulation pipe Y ₄ → The bath outlet temperature sensor 26 for detecting the temperature of the hot water flowing in the bath circulation pipe Y ₁ after being returned to the water heat exchanger 4 via the running water pipes Y ₇ and Y ₈ and reheated, and the bath circulation pipe Y ₄ It is controlled by a signal from the bath entrance temperature sensor 27 that detects the temperature of the flowing water, and is repeatedly operated until a predetermined bath water temperature is reached.

On the other hand, if the "automatic filling operation mode" is selected when the water level in the bathtub B is lower than the set water level,
As shown in FIG. 18, the hot water in the hot water storage tank 7 is supplied from the hot water supply circulation pipe Y ₃ → hot water supply two-way switching valve MV ₂ → water heat exchanger 4 →
Running water pipe Y ₅ → flowing to the mixing branch point Z, while the hot water storage tank 7
The cold water supplied from the bottom of the hot water circulation pipe Y ₂ →
The hot water supply pump 9 → hot water supply proportional valve MV ₁ → flows to the mixing branch point Z, and at this mixing branch point Z, the hot water and the cold water are mixed with the hot water of the set temperature, and then the mixed hot water is fed into the running water pipe Y. ₉ →
The bath three-way switching valve WV ₄ → bath circulation pump 10 → bath proportional valve MV ₃ → bath circulation pipe Y ₁ → sent to the bathtub B, and hot water of a preset temperature is supplied to the bathtub B up to the preset water level. However, when all the remaining hot water display in the hot water storage remote controller 7 is turned off or the shortage of remaining hot water is lit, even if this mode is selected, the filling of water cannot be completed at the specified temperature once. However, it is configured to automatically shift to the bath heating operation.

If the "automatic water filling operation mode" is selected when the water level in the bathtub B is lower than the set water level,
As shown in FIG. 19, the cold water supplied from the lower part of the hot water storage tank 7 is the hot water supply circulation pipe Y ₂ → hot water supply pump 9 → hot water supply proportional valve MV ₁ → mixing branch point Z → running water pipe Y ₉ → bath water 3
Direction switching valve WV ₄ → bath circulation pump 10 → bath proportional valve M
V ₃ → Bath circulation pipe Y ₁ → Sent to bathtub B and supplied to bathtub B up to the set water level.

In the example of the actual hot water supply operation, when the hot water supply operation is started, the water temperature is detected by the incoming water temperature detection sensor to maintain a predetermined valve opening degree, and then the predetermined temperature rise is detected by the condensation temperature detection sensor for circulation. Start the pump (hot keep function). When the operation of the circulation pump is started, the opening / closing degree of the proportional valve is constantly controlled based on the comparison between the hot water temperature (condensation temperature) and the set value and the degree of change of the condensation temperature. Further, when stable, the condensing temperature parameter is switched to the tap water temperature, and the refrigerating cycle state is monitored by correcting the condensing pressure. In this refrigeration cycle, the effect of the superheated gas region is added, but in the normal case, when the tapping temperature is not strictly required, the optimal control factor is to standardize the cycle state by the refrigerant pressure and control the temperature and flow rate. Is desirable.

[0040]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it is possible to use one heat pump device for hot water supply / cooling hot water supply / heating hot water supply / cooling bath heating / heating bath heating (heat retention) / cooling / heating. It has two main functions, and moreover, it is possible to minimize the heat radiation while returning the high temperature water discharged from the outlet of the water heat exchanger to the upper part of the hot water storage tank.
The manufacturing costs and construction costs associated with this type of heat pump hot water supply air conditioner can be significantly reduced, and the hot water tank and hot water supply unit are integrated to reheat and keep warm bath water with the same water heat exchanger. Since it is configured so that it can be performed, the apparatus can be significantly downsized, and since it has excellent energy conversion efficiency, running costs can be kept low, and many other excellent effects can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a heat pump hot water supply / cooling system according to an embodiment of the present invention.

FIG. 2 is a refrigerant circuit diagram showing a refrigerant flow path of the heat pump hot water supply / cooling system.

FIG. 3 is a refrigerant circuit diagram showing a refrigerant flow in a “cooling operation mode” in the heat pump hot water supply / cooling apparatus.

FIG. 4 is a refrigerant circuit diagram showing a refrigerant flow in a “heating operation mode” in the heat pump hot water supply / cooling apparatus.

FIG. 5 is a refrigerant circuit diagram showing a refrigerant flow in a “hot water supply operation mode” in the heat pump hot water supply / cooling system.

FIG. 6 is a refrigerant circuit diagram showing a refrigerant flow in the “bath heating operation mode” in the heat pump hot water supply / cooling system.

FIG. 7 is a refrigerant circuit diagram showing a refrigerant flow in the “cooling / hot water supply operation mode” in the heat pump hot water supply / cooling system.

FIG. 8 is a refrigerant circuit diagram showing a refrigerant flow in the “cooling / bath heating mode” in the heat pump hot water supply / cooling system.

FIG. 9 is a refrigerant circuit diagram showing a refrigerant flow in the “heating / hot water supply operation mode” in the heat pump hot water supply / cooling system.

FIG. 10 is a refrigerant circuit diagram showing a refrigerant flow in a “heating / bath warming operation mode” in the heat pump hot water supply / cooling / heating apparatus.

FIG. 11 is a refrigerant circuit diagram showing a refrigerant flow in the “hot water supply defrost operation mode” or the “bath heating defrost operation mode” in the heat pump hot water supply / cooling apparatus.

FIG. 12 is a refrigerant circuit diagram showing a refrigerant flow in the “heating defrost operation mode”, the “heating / hot water supply defrost operation mode”, or the “heating / bath warming defrost operation mode” in the heat pump hot water supply / cooling system. ..

FIG. 13 is a flowchart showing an example of operation control in the heat pump hot water supply / cooling system.

FIG. 14 is a flowchart showing a flow of operation commands in the “cooling hot water supply / bath operation mode” in the heat pump hot water supply / cooling system.

FIG. 15 is an operation flow chart in the “hot water supply operation mode” in the heat pump hot water supply / cooling system.

FIG. 16 is a circuit diagram showing a flow of hot water and water in the “hot water supply operation mode” in the heat pump hot water supply / cooling system.

FIG. 17 is a circuit diagram showing a flow of hot water and water in the “bath heating (warm) operation mode” in the heat pump hot water supply / cooling system.

FIG. 18 is a circuit diagram showing a flow of hot water and water in the “automatic hot water filling operation mode” in the heat pump hot water supply / cooling system.

FIG. 19 is a circuit diagram showing a flow of water in the “automatic water filling operation mode” in the heat pump hot water supply / cooling system.

[Explanation of symbols]

1 Outdoor Heat Exchanger 2 Indoor Heat Exchanger 3 Compressor 4 Water Heat Exchanger 5 Receiver 7 Hot Water Storage Tank 8 Expansion Mechanism P _{1 to} P ₂₂ Refrigerant Pipe SV ₁ , SV ₂ , SV ₃ Solenoid Valve SV ₄ Multifunctional Expansion Valve Y ₁ , Y ₄ bath circulation pipe Y ₂ , Y ₃ hot water supply circulation pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshifumi Masuda 3-25-3 Yoyogi, Shibuya-ku, Tokyo Sun Wave Industry Co., Ltd. (72) Akira Tabata 3-25-3 Yoyogi, Shibuya-ku, Tokyo Sun Wave Industrial Co., Ltd.

Claims (1)

[Claims] 1. A heat pump cycle heating device in which a compressor, an evaporator, a load air side condenser, a heat source side water heat exchanger and an expansion mechanism are connected in communication by a refrigerant pipe line, and the water heat exchanger is connected. In a hot water supply / cooling device comprising a hot water storage tank for storing heat and an auxiliary heating device for heating water in the hot water storage tank, the triple pipe heat exchange coil of the water heat exchanger is wound around the hot water storage tank. A hot-water supply / cooling system that is equipped and installed.