JPH025984B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention makes it possible to save bath water by circulating the hot water in the bathtub, and also to heat the bath water and use it for drinking water supplied indoors from the hot water tank. -Relating to a hot water circulation heating device that heats cooking water with high efficiency and saves thermal energy.

<Conventional technology> When reusing hot water in a bathtub, conventionally, human hair, dirt, and other impurities in the bathtub water are removed by filtration, and the bathtub is reused in a completely clean state. However, they were reused several times and then discarded. or,
Heating of bathtub water and drinking water supplied indoors was generally performed using separate heaters.

<Problems to be Solved by the Invention> Therefore, in the conventional circulating use of hot water tanks, only filtration is performed, and it is not possible to sterilize the hot water, remove fat dispersed in the hot water, or remove odors. ,
It was becoming bad for my health. Furthermore, because the number of times the water can be recycled is limited, it has not resulted in fundamental water conservation. Furthermore, even when heating bathtub water or heating hot water, thermal energy cannot be saved, making it extremely uneconomical.

The present invention has been made in consideration of the above-mentioned circumstances, and provides a hot water circulation heating device that is capable of increasing the number of times bathtub water is circulated and used, thereby improving the water saving rate, and also making it possible to save thermal energy. It is.

<Means for Solving the Problems> The present invention uses a heat pump to heat bathtub water and hot water for hot water supply in order to sterilize and filter bathtub water and enable long-term circulation use. In addition, the high-temperature refrigerant gas from the heat pump is circulated to heat the hot water in the hot water supply tank and the bath water in the bathtub, making it possible to save thermal energy.

That is, the hot water circulation heating device according to the present invention,
A circulation tank that includes a filter and a pump that are connected to the bathtub through a pipe and that circulates bathwater between the bathtub and the bathtub; and sterilization means that supplies ozone air into the bathtub hot water to sterilize it. a heating coil that heats the bath water by heat exchange; a hot water supply tank that includes a high-temperature heating coil and a preheating coil; a heat pump that compresses refrigerant gas into high-temperature gas; A refrigerant path that connects the heating coil, high-temperature heating coil, pre-heating coil, and heat pump so that refrigerant gas circulates; It is characterized by comprising a switching means for switching between the heating coil and the heating coil.

<Examples> Examples illustrating the present invention will be specifically described below.

FIG. 1 is a piping system diagram of a hot water circulation heating device according to the present invention. This circulation heating device includes a circulation tank 2 that circulates and filters hot water in a bathtub 1, a heat pump 3 that compresses and heats refrigerant gas using outside air as a heat source, and a hot water tank 4 that stores hot water to supply indoors. It is equipped with

The circulation tank 2 has a filter 21 and a pump 2 inside.
2 are provided, and these are connected in series by a conduit. The bathtub 1 is an outgoing pipe 23.
and a return pipe 24, and the pump 2
2, the hot water in the bathtub 1 is guided into the filtration device 21 and filtered, and impurities such as human hair and dirt are removed. It is designed to gush out into the bathtub 1. Furthermore, an activation tank 25 filled with activated stones such as maifan stone and sulfur stone is connected between the filtration tank 21 and the pump 22. This activation tank 25
The bathtub water that has passed through the filtration tank 21 is ion-exchanged to return it to its original water quality, and the active ingredients such as iron, magnesium, calcium, and sodium contained in the activated stones are eluted into the bathtub water, giving it a bathing effect. It has the effect of increasing the Furthermore, a sterilizing means 5 is provided at a position adjacent to such a circulation tank 2. The sterilization means 5 has an ozone generator 5 inside.
1 is provided, and an air pipe 52 is led out from the ozone generator 51, and this air pipe 52 is connected to the vicinity of the outlet of the outgoing pipe 23. Therefore, ozone from the ozone generator 51 is supplied from the outgoing pipe 23 into the bathtub water and is ejected into the bathtub 1 together with the jet water flow. As a result, the oxidizing power of ozone sterilizes the bath water or decomposes fat, etc., and the bath water is cleaned, so the number of times the bath water is circulated can be dramatically increased. Therefore, it is possible to save bath water.

The circulation tank 2 is filled with a bathtub 1 by the operation of a pump 22.
A heating coil 8 is provided that heats the bathtub water drawn from inside through heat exchange. In this embodiment, the heating coil 8 is disposed within the activation tank 25 and is adapted to heat the bath water flowing into the activation tank 25. The heating coil 8 is supplied with refrigerant gas from a heat pump 3, which will be described later, and heats the bathtub water through heat exchange. In FIG. 1, solid arrows indicate circulation paths through which bath water is filtered and heated.

The heat pump 3 is provided with a compressor 31 that compresses refrigerant gas into high-temperature refrigerant gas, and a fan 32 that blows outside air onto the refrigerant gas pipe to exchange heat. This heat pump 3
The refrigerant gas is compressed to a high temperature using outside air as a heat source, and conventionally known types are used.

The hot water tank 4 has a water inlet 41 formed at the bottom thereof,
A water outlet 42 is formed in the upper part, and the water outlet 42
is connected to an indoor faucet 43 or the like to supply hot water for drinking or the like indoors. A high-temperature heating coil 6 and a pre-heating coil 7 are disposed within the hot water tank 4 to heat water stored therein through heat exchange. The high temperature heating coil 6 is provided in the upper part of the hot water tank 4, that is, on the water outlet 42 side, and the preheating coil 7 is provided in the lower part of the hot water tank 4, that is, on the water outlet 42 side.
That is, it is provided on the entrance/exit 41 side. Fins 61 and 71 are attached to the high temperature heating coil 6 and preheating coil 7, respectively.
The water supplied into the hot water tank 4 via 71 is heated. Such a high temperature heating coil 6,
The preheating coil 7 and the heating coil 8 in the circulation tank 2 have a length that allows sufficient heat exchange.For example, in the case of general household use, the heating coil 6
is set to be 12 m, the preheating coil 7 is set to be 2.5 to 3.0 m, and the heating coil 8 is set to be 10 m. and,
These coils 6, 7, and 8 are connected to the heat pump 3 through a refrigerant path 9, and the refrigerant gas from the heat pump 3 heats the hot water in the bathtub 1 and the water in the hot water tank 4. . The configuration of this refrigerant path 9 includes an outgoing circuit 91 that connects the outlet 33 of the compressor 31 of the heat pump 3 and the inlet 62 of the high-temperature heating coil 6, and an outlet 72 of the preheating coil 7 and the inlet 62 of the compressor 31 of the heat pump 3. a return circuit 93 connecting to the inlet 34;
Branched from the outgoing circuit 91 to the compressor 3
1, the inlet 81 of the heating coil 8, and the outlet 63 of the high-temperature heating coil 6.
circulation circuit 92 and outlet port 82 of the heating coil 8
and a second circulation circuit 94 that connects the inlet 73 of the preheating coil 7 and a first bypass circuit 95 that connects the outlet 63 of the high temperature heating coil 6 and the inlet 73 of the preheating coil 7. , and a second bypass circuit 96 connecting the second circulation circuit 94 and the return circuit 93. A switching means 100 for switching the refrigerant gas from the heat pump 3 between the heating coil 8, the high temperature heating coil 6, and the preheating coil 7 is disposed in the refrigerant path 9. This switching means 100 includes a valve 101 provided in the outgoing circuit 91 and a first circulating circuit 92.
It consists of a valve 102 provided in the first bypass circuit 95, a valve 103 provided in the second bypass circuit 96, and a valve 104 provided in the second bypass circuit 96.
The opening and closing operations of and 104 are controlled by a controller 110.

Here, temperature sensors 111, 112, and 113 are provided in the bathtub 1, the high-temperature heating coil 6 side of the hot water tank 4, and the preheating coil 7 side of the hot water tank 4, respectively. It is now possible to detect Then, this detection signal is sent to the comparator 114.
from the comparator 114 to the controller 11
0. The controller 110 includes a memory section that can set the temperature of the bathtub water and the hot water on the preheating coil 7 side in advance, and each valve 101, 1.
At least an electric circuit for switching between 02, 103 and 104 is provided to automatically control the circulation of refrigerant gas.

Next, an example of a control method for operating the above configuration will be described. In advance, the controller 110
The temperature of hot water in bathtub ₁ T1 is a constant temperature (for example, 42℃)
In addition, the temperature T ₃ of the hot water on the preheating coil 7 side of the hot water supply tank 4 can be set to a constant temperature (for example, 43° C.), and the set temperature is stored in the controller 110. The stored set temperature is taken out by a comparator 114 and compared with temperature information from temperature detectors 111, 112, 113, and the results are fed back to the controller 110. If the temperature _T1 of the hot water in the bathtub 1 is below the set temperature, it is necessary to heat the bathtub water.
The temperature T ₁ of the hot water in the bathtub 1 is also compared with the temperature T ₂ on the high temperature heating coil 6 side of the hot water tank 4 and the temperature T ₃ on the preheating coil 7 side. Here, the temperature T ₃ of the preheating coil 7 side of the hot water tank 4 is also compared with the set temperature, and if this temperature T ₃ is lower than the set temperature, it is necessary to heat the hot water tank 4 at the same time. In such a state, the comparator 114 compares the temperatures T ₁ , T ₂ , and T ₃ with each other. As a result of this comparison, if the temperature T ₁ of the bathtub 1 is between the temperature T ₃ on the preheating coil 7 side of the hot water tank 4 and the temperature T ₂ on the high temperature heating coil 6 side, that is, T ₃ < T ₁ <
In the case of _T2 , only the valve 101 is opened by the command from the controller 110, and the other valves 10
2,103,104 are closed. This results in
The high temperature refrigerant gas from the heat pump 3 is sent to the outgoing circuit 9
1→high temperature heating coil 6→first circulation circuit 92→warming coil 8→second circulation circuit 94→preheating coil 7→return circuit 93→heat pump 3, heating hot water tank 4 to high temperature → bathtub Heat exchange is performed in the order of heating of the hot water No. 1 and preheating of the hot water tank 4. In this heat exchange, most of the refrigerant gas is heat exchanged between the high-temperature heating coil 6 and the heating coil 8, and then
It is introduced into the preheating coil 7. The refrigerant gas introduced into the preheating coil 7 is the gas from the subcooled portion, and conventionally it was not used at all and was returned to the heat pump 3 as it is, but the hot water tank 4
By being used to preheat the hot water inside, the heat is used effectively. In addition, in the above comparison, the temperature T ₁ of the hot water in the bathtub 1 is the temperature in the hot water tank 4.
When higher than T ₂ and T ₃ , that is, when T ₁ > T ₃ and when T ₁ > T ₂ , the controller 11
With the command 0, only the valve 102 is opened and the other valves 101, 103, and 104 are closed. As a result, the refrigerant gas from the heat pump 3 is transferred from the first circulation circuit 92 to the heating coil 8 to the second circulation circuit 94 to the preheating coil 7 to the returning circuit 93.
It circulates in the order of heat pump 3. That is, the hot water in the bathtub 1 and the hot water supply tank 4 are heated in the same manner as described above, but the hot water is circulated so that the preheating coil 7 side of the hot water supply tank 4 is sufficiently heated rather than the high temperature heating coil 6 side. Next, if heating the hot water tank 4 is not required, or if it is necessary to rapidly heat the hot water in the bathtub 1, the hot water in the bathtub 1 can be heated by giving a command to that effect to the controller 110. only is done. In response to this command, the controller 110 opens the valves 102 and 104 and closes the valves 101 and 103, and the refrigerant gas from the heat pump 3 is routed from the first circulation circuit 92 to the heating coil 8 to the second
The hot water in the bathtub 1 is heated by circulating through the circulation circuit 94 → second bypass circuit 96 → return circuit 93 → heat pump 3.

Here, it is also possible to program so that the temperature _T3 on the side of the preheating coil 7 can be set within a certain range (for example, 40 to 42°C). With this program setting, the controller 110 controls the hot water tank 4 when the temperature T ₃ is higher than the upper limit temperature (for example, 42°C).
It is determined that there is no need to heat the bathtub 1, and the hot water in the bathtub 1 is heated preferentially as described above.
When the temperature _T1 of the hot water is higher than the set temperature, all the valves 101, 102, 103, 104 are closed and the operation of the heat pump 3 is stopped. temperature
If T ₃ is below the lower limit temperature (e.g. 40℃),
Based on the comparison result between the temperature T ₁ of the hot water in the melt tank 1 and its set temperature, only the hot water tank 4 is heated when the temperature T ₁ is higher than the set temperature. In this case, controller 110 opens valves 101 and 103 and closes valves 102 and 104. As a result, the refrigerant gas from the heat pump 3 flows from the outgoing circuit 91 → high temperature heating coil 6 → first bypass circuit 95 → preheating coil 7 → return circuit 93 →
It circulates with the heat pump 3 and heats only the hot water tank 4. Note that the controller 11 indicates that heating only the hot water tank 4 does not heat the hot water in the bathtub 1.
The same operation is performed when the command is set to 0.

As described above, since the refrigerant gas circulation path can be appropriately switched between the heating coil 8, the high temperature heating coil 6, and the preheating coil 7 by the switching means 100, an arbitrary program can be set in the controller 110. In this way, not only the above operations but also all other controls are performed.

Therefore, with the above configuration, the temperature of the hot water in the bathtub and the temperature of the hot water in the hot water supply tank can always be maintained at the set temperature, so that both types of hot water can be used at any time.
Furthermore, since the heat pump stops driving when the temperature is higher than the set temperature, energy waste is reduced.

Note that various modifications can be made to the present invention. For example, the activation tank may be omitted, or ozone may be introduced into the circulation tank without being ejected into the bath.
Alternatively, automatic control may be performed according to the temperature setting on the high temperature heating coil side.

<Effects of the Invention> As described above, according to the present invention, since the hot water in the bathtub is filtered and sterilized with ozone, the number of times it can be recycled increases and the bathtub hot water can be saved. In addition, since the refrigerant gas from the heat pump is used to heat the bathtub water and the hot water tank, thermal energy can be used effectively, reducing power consumption. It is effective in that it can heat hot water and hot water in a hot water tank, and the device can be made more compact.

[Brief explanation of drawings]

FIG. 1 is a piping system diagram of one embodiment of the present invention. 1... Bathtub, 2... Circulation tank, 3... Heat pump, 4... Hot water tank, 5... Sterilization means, 6... High temperature heating coil, 7... Preheating coil, 8... Warming coil, 9 ... Refrigerant path, 100 ... Switching means, 1
01, 102, 103, 104... Valve.

Claims (1)

[Scope of Claims] 1. A circulation tank that is equipped with a filtration device and a pump and that is connected to the bathtub through a pipe and that circulates bathwater between the bathtub and the bathtub, and supplies ozone air into the bathtub hot water. a heating coil that heats the bath water by heat exchange; a hot water tank having a high temperature heating coil and a preheating coil installed therein; a heat pump that uses gas; a refrigerant path that connects the heating coil, high-temperature heating coil, preheating coil, and heat pump so that refrigerant gas circulates; and a refrigerant path disposed in the refrigerant path that heats the refrigerant gas from the heat pump. A circulating heating device for hot water, comprising a coil and switching means for switching between a high temperature heating coil and a preheating coil.