JPH0330067B2 - - 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 reduce the amount of hot water supplied indoors from the bathtub and hot water tank for drinking and cooking. The present invention relates to a hot water circulation heating device that can heat hot water for use in business or bathing with high efficiency and save 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 bathtub water, 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. In addition, because the number of times the water can be recycled is limited, it has not resulted in fundamental water conservation. Furthermore, it is not possible to save thermal energy when heating bathtub water or heating hot water, which is 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 bath hot water is circulated and used, thereby improving the water saving rate and saving thermal energy. be.

<Means for Solving the Problems> The present invention sterilizes and filters bathtub water to enable long-term circulation use, and uses a heat pump to heat bathtub water and hot water for hot water supply. This makes it possible to save thermal energy by circulating high-temperature refrigerant gas from a heat pump from heating the hot water in the bathtub to preheating the hot water tank.

That is, the hot water circulation heating device according to the present invention,
A circulation tank is provided with a filtration device, a pump, and an activation tank connected to the bathtub by a pipe, and the bathtub water is circulated between the bathtub and the bathtub, and ozone air is supplied into the bathtub hot water for sterilization. A sterilizing means, a heat pump that compresses refrigerant into high-temperature gas, a heating coil that is connected to the outlet of the heat pump and heats bath water through heat exchange, and a hot water tank that supplies hot water indoors. The heat pump is characterized in that it includes a preheating coil whose inlet is connected to the outlet of the heating coil, and whose outlet is connected to the inlet of the heat pump.

<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's starting to gush inside. or,
An activation tank 25 filled with activated stones such as maifan stone and sulfur stone is connected between the filter 21 and the pump 22. This activation tank 25 ion-exchanges the bath water that has passed through the filter 21 to return it to its original water quality, and also elutes active ingredients such as iron, magnesium, calcium, and sodium contained in the activated stones into the bath water. It has the effect of increasing the bathing effect. A sterilizing means 5 is provided at a position adjacent to such a circulation tank 2. The sterilizing means 5 is provided with an ozone generator 51 therein, 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 inventor 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 the bathtub by heat exchange. In this embodiment, the heating coil 8 is arranged so as to be wound around the activation tank 25.
It is designed to heat the bath water flowing into the bathtub. The heating coil 8 is supplied with high-temperature refrigerant gas from a heat pump 3, which will be described later, and heats the bathtub water by heat exchange. In Figure 1,
Thin arrows indicate the circulation path 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
Hot water for drinking, etc., is supplied from the indoor faucet (not shown). A preheating coil 6 is disposed within the hot water tank 4 to preheat the water stored therein through heat exchange.

In this embodiment, the preheating coil 6 is provided at the lower part of the hot water tank 4, that is, on the water inlet 41 side, and is designed to preheat makeup water supplied into the hot water tank 4 via the fin 63. . The preheating coil 6, the heat pump 3, and the heating coil 8 are connected in series by a refrigerant path, and the refrigerant gas from the heat pump 3 heats the hot water in the bathtub 1 and prepares the water in the hot water tank 4. Heating is now taking place. In this connection, the outlet 33 of the heat pump 3 is connected to the inlet 81 of the heating coil 8 via the three-way valve 9, and the outlet 82 of the heating coil 8 is connected to the inlet of the preheating coil 6 in the hot water tank 4. 61 , and further, the outlet 62 of the preheating coil 6 is connected to the inlet 34 of the heat pump 3 . Therefore, heat pump 3
The refrigerant gas heated to high temperature by compression is first introduced into the heating coil 8 on the side of the activation tank 25 to heat the bath water, and then introduced into the preheating coil 6 in the hot water supply tank 4. The water used for hot water supply is now preheated. This allows a single heat pump to heat the bathtub water and the hot water for hot water supply, thereby saving thermal energy. Here, the refrigerant gas that has finished heating the bathtub water is introduced into the preheating coil 6 at a temperature of about 40 to 50°C. The refrigerant gas in this temperature range is the supercooled gas and has not been used at all in the past.
It is then returned to the heat pump and recompressed. Gas from such a supercooled portion is transferred to the hot water tank 4.
By preheating the water, the amount of heat held by the gas in the supercooled part can be effectively used.
Further reduction in thermal energy becomes possible.

In this case, heating the hot water in the hot water tank 4 to 90 to 100°C can be done by using a separate heat. Also in this case, since the hot water in the hot water supply tank 4 is preheated to about 40 to 50°C, the amount of heat consumed by the heater can be reduced. here,
Generally, the heating of the bathtub water by the heating coil 8 may be terminated when the temperature of the bathtub water reaches approximately 40 to 50°C. Therefore, after the heating of the bathtub water is completed, the three-way valve 9 may be operated to supply the high-temperature refrigerant gas from the heat pump 3 directly to the preheating coil 6. This makes it possible to only heat the water in the hot water tank 4. In this case, the water in the hot water tank 4 is 90 to 100
℃, so there is no need to use a separate heater. Note that the refrigerant gas introduced into the preheating coil 6 may not be a subcooled portion but may be a high temperature gas having a large heating capacity.

In FIG. 2, a hot water tank 4 is connected to a circulation tank 2 via a gap 10.
This is an embodiment in which the heat pump 3 is integrally attached to the heat pump 3, and by being integrated, the device can be made smaller and the installation space can be reduced.

FIG. 3 is a Mollier diagram showing the heat exchange ability between the refrigerant gas and water in the hot water tank 4. FIG. When the heat pump 3 is used only for normal heating of bathtub water, the cycle is A→B→C→D→E→A, but by introducing refrigerant gas into the heating coil 8 and preheating coil 6. A→B'→B→C→D
→ E → A → A′ cycle. Therefore, the enthalpy (ii) of the B-B' part, which is the supercooled part, is
is used for preheating the water in the hot water tank 4, and the temperature of hot water can be raised without increasing power consumption.

Note that various modifications can be made to the present invention. For example, ozone may be introduced into the circulation tank without being ejected into the bathtub. Further, the heating coil may be disposed within the bathtub, or may be disposed separately within the tank to heat the bathtub water. Furthermore, the three-way valve may be omitted.

<Effects of the Invention> As described above, according to the present invention, hot water in a bathtub is filtered and sterilized with ozone, and moreover, the hot water in the bathtub is ion-exchanged in an activation tank to return it to its original water quality. With the increased effectiveness of bathing, the number of times the bath can be reused increases, making it possible to save on bath water. In addition, since the refrigerant gas from the heat pump is used in order to heat the bathtub water and preheat the hot water tank according to the amount of thermal energy, it is possible to use thermal energy effectively.
In addition to being able to reduce power consumption, a single heat pump can heat hot water in the bathtub and hot water tank, making the device more compact.

[Brief explanation of the drawing]

Fig. 1 is a piping system diagram of one embodiment of the present invention;
The figure is a plan view of another embodiment, and FIG. 3 is a Mollier diagram of the hot water supply system. 1... Bathtub, 2... Circulation tank, 3... Heat pump, 4... Hot water tank, 5... Sterilization means, 6... Preheating coil, 8... Warming coil, 21... Filter, 22 ... Pump, 33, 62, 82 ... Outlet, 34, 82, 61 ... Inlet.

Claims (1)

[Scope of Claims] 1. A circulation tank that is connected to a bathtub by a pipe and is equipped with a filtration device, a pump, and an activation tank, and that circulates bathwater between the bathtub and the bathtub; and ozone air in the bathtub hot water. A heat pump that compresses the refrigerant into high-temperature gas; A heating coil that is connected to the outlet of the heat pump and heats bath water through heat exchange; and A heating coil that supplies hot water indoors. a preheating coil disposed in a hot water tank, an inlet of which is connected to an outlet of the heating coil, and an outlet of which is connected to an inlet of the heat pump. circulation heating device.