JPH0534014A - Drying and hot water supplying device by means of heat pump utilizing waste heat of bath - Google Patents

Abstract

PURPOSE:To increase a quantity of a storage hot water heat and to save energy by a method wherein a hot water storage tank is heated through dehumidification drying of a bath room with the aid of a heat pump system, bath heating, and utilization of the waste heat thereof. CONSTITUTION:Simultaneously with completion of bathing, a quantity of the heat of hot water remaining in a bath 13 is received and a quantity of the recovered heat is utilized. Namely, dehumidifying drying of the interior of a bath room is not effected simultaneously with dehumidifying reheating, and heating, cooling, and heating are repeatedly effected for a specified period. Further, during heating for drying, a quantity of a recovery heat of the bath 13 collected again and utilized as a quantity of heat of storage in a hot water storage tank 11 togetherwith the waste heat of the bath 13. This constitution performs high temperature high capacity heating, high capacity dehumidification, dehumidification drying through utilization of a waste heat, and saves energy of heating of the hot water storage tank 11.

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 system for heating a hot water storage tank by using a heat pump system for dehumidifying and drying a bathroom, heating a bath and utilizing its exhaust heat.

[0002]

2. Description of the Related Art As a conventional dryer in a bathroom, there is a dryer which uses a heater or boiler hot water heating in combination with ventilation, and a dryer which performs dehumidification and reheating in a refrigeration cycle. For example, the refrigeration cycle dryer is shown in FIG.
As shown in FIG. 3, the compressor 1, the indoor first heat exchanger 2, the expansion valve 3, the indoor second heat exchanger 4, and the compressor 1 are sequentially connected by refrigerant pipes, and the fan 5 and the fan motor 6 blow the air inside the room. It is configured to circulate. The refrigeration cycle dryer has a structure in which the indoor air is once cooled and dehumidified by the indoor second heat exchanger 4 and then reheated by the indoor first heat exchanger 2 to be returned to the room as indicated by an arrow. Was there.

[0003]

However, in the above-mentioned conventional structure, the dehumidifying and drying in the bathroom and the drying of clothes are insufficient in ability, and the drying speed is slow, and a long drying time is required. Further, the heater or the boiler hot water heating type dryer does not have a dehumidifying function during the rainy season or in the high humidity season of summer, so that the drying time is long.

On the other hand, the conventional heat pump type water heater has a feature that the running cost is lower than that of the electric water heater. However, since the amount of heat collected in winter was low, the actual load was insufficient, and an auxiliary heat source such as a heater was needed.
As a result, there is a problem that it is less distinctive than other water heaters such as electric water heaters. In addition, the gas and heat pump type bath reheating device was developed with the purpose of preventing the bath water from cooling down. There was a waste.

The present invention solves the above problems, and provides a heat pump dry water heater for effectively utilizing the exhaust heat of a bath for heating a hot water storage tank, dehumidifying a bathroom, and heating for drying. .

[0006]

In order to achieve the above object, the present invention introduces a heat pump system, in which, in addition to hot water supply heating, a drying system in a bathroom is heated, cooled and dehumidified, and a repeated drying mode is used to dehumidify and reheat. In addition to adding a finishing function by drying, the exhaust heat of the bath is recovered at the same time as the bathing is completed for the dry heating in the dry mode and the amount of heat is used, and the exhaust heat and the exhaust heat of the bath are used during cooling and dehumidifying in the dry mode. It has a constitution of a drying control device that collects heat at the same time or alternately and uses it for heating hot water and a heat pump drying water heater using bath waste heat.

[0007]

The present invention resides in a method of recovering the amount of heat of the remaining hot water in the bath and utilizing the amount of heat at the same time as the end of bathing according to the above-mentioned constitution. Instead of simultaneously performing dehumidifying and drying in the bathroom, dehumidifying and reheating are performed.
Heating, cooling, and heating are repeated for a certain period of time, and the amount of heat recovered from the bath is used during the heating for the drying, and the amount of heat in the bathroom that has once been warmed is recollected during the next cooling and dehumidification to exhaust the heat from the bath. At the same time, since it is used as the amount of heat for heating the hot water, high-temperature high-performance heating and high-performance cooling dehumidification, dehumidification and drying by using waste heat, and further energy saving of the hot water storage tank heating can be obtained.

[0008]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 shows a heat pump drying water heater using bath exhaust heat, which collects the exhaust heat of the bath and uses it as a heating source for the bath interior and hot water storage tank 11 A heating circuit A, a bath exhaust heat and a cooling exhaust heat in the bathroom are collected at the same time and used as a hot water tank heating source. Bath exhaust heat utilizing dry heating circuit C used as a heating source for drying, bath exhaust heat utilizing hot water tank drying heating circuit A, bath exhaust heat utilizing dry heating circuit C and bath dry exhaust heat utilizing hot water tank heating The circuit B is operated to heat the interior of the bathroom to a preset high temperature, a high temperature keeping operation to maintain the preset high temperature, and a cooling / dehumidifying operation to return the preset low temperature to the preset low temperature. Low temperature warming to keep warm When the heating operation from the high temperature thermal insulation operation, followed the cooling dehumidifying operation, and and a drying operation controller 24 repeatedly controls to the heating operation from the low-temperature heat retaining operation.

The bath heating heat utilization hot water storage tank drying and heating circuit A is a compressor 1 for compressing and compressing a refrigerant, a hot water storage tank water heat exchanger 2, a first four-way valve 3, a second four-way valve 4, and a first expansion. Hot water tank heating path D flowing to the valve 5, the compressor 1, the third four-way valve 6,
The dry heating path E flowing to the bathroom indoor unit 7 merges, and then the second expansion valve 8, the outdoor heat exchanger 9, the first four-way valve 3,
It is a circuit that returns to the compressor 1 via a bath water heat exchanger 10 and an atmospheric heat bath exhaust heat collection path to the second four-way valve 4.

Further, the hot water storage tank heating circuit B utilizing the dry heat from the bath includes the compressor 1, the hot water tank water heat exchanger 2, the first four-way valve 3, the second four-way valve 4, and the first expansion valve 5. From the hot water tank heating path D to the second expansion valve 8, the outdoor heat exchanger 9,
The first four-way valve 3, the bath water heat exchanger 10, the second
The air heat bath exhaust heat collection path F to the four-way valve 4 is divided into a path to the bathroom indoor unit 7 and the third four-way valve 6, and the compressor 1
It is configured to meet at.

Further, the drying operation control device 24 includes a hot water storage tank 1
1, a hot water tank water circulating pump 12, a hot water tank water heat exchanger 2 for exchanging heat between refrigerant and water, a hot water tank water circulating circuit G configured by connecting hot water tank 11 with water piping, a bathtub 13, and a bath water circulating pump 14. , The bath water circulation circuit H in which the bathtub 13 is connected by a water pipe, the bath exhaust heat utilizing hot water storage tank drying heating circuit A and the bath drying exhaust heat utilizing hot water storage tank heating circuit B are controlled to set a preset high temperature in the bathroom. Heating operation control to heat to the set temperature,
Cooling / dehumidifying operation control for returning the bathroom to a preset low temperature setting temperature, in addition, drying operation control configured by repeating operation of the cooling / dehumidifying operation control and heating operation control, and bath exhaust heat of the operation control A bath exhaust heat hot water storage tank drying and heating operation control is used as a heating heat source for the hot water storage tank 11 and the drying chamber, and a bath drying waste heat hot water storage tank heating operation control is performed for using the bath drying waste heat as a heating heat source for the hot water storage tank 11.

As the second operation control provided in the drying operation control device, the drying heating path E including the compressor 1, the third four-way valve 6 and the bathroom internal unit 7, the second expansion valve 8, and the outdoor heat exchange. 9. A bath exhaust heat utilization dry heating circuit C consisting of nine machines, the first four-way valve 3, the bath water heat exchanger 10, the second four-way valve 4, and an atmospheric heat bath exhaust heat collecting path to the compressor 1. The hot-water tank heating circuit utilizing the bath dry waste heat (this is the compressor 1, the hot-water tank water heat exchanger 2, the first four-way valve 3, the second four-way valve 4, the first expansion valve 5 as described above. Atmospheric heat bath exhaust heat collection from the hot water tank heating path to the second expansion valve 8, the outdoor heat exchanger 9, the first four-way valve 3, the bath water heat exchanger 10, and the second four-way valve 4. Refrigerant so as to be diverted into a path and the path to the bathroom indoor unit 7 and the third four-way valve 6 and merge in the compressor 1. And configured.) Connected by a tube,
In addition to the heating control for heating the bath exhaust heat utilizing dry heating circuit C and the bath drying exhaust heat utilizing hot water tank heating circuit B to heat to the high temperature set temperature in the drying chamber and the cooling and dehumidifying control for returning to the low temperature set temperature. Drying control configured by repeating control of the cooling control and the heating control, bath exhaust heat dry heating operation control using the bath exhaust heat of the drying control as a heating heat source of the drying chamber, and bath dry exhaust heat storage It has a control for repeating the bath dry waste heat storage hot water tank heating operation control which is a heating heat source of the bath, the bath waste heat dry heat heating operation control and the bath dry waste heat hot water storage tank heating operation control.

The bathroom indoor unit 7 is the first indoor heat exchanger 1.
4, a parallel circuit of the first solenoid valve 15 and the third expansion valve 16, the second indoor heat exchanger 17, the first check valve 18, and the fourth expansion valve 19
The second solenoid valve 20 and the second check valve 21 are connected in series.
Is connected in parallel with a refrigerant pipe, and is configured by an indoor fan 22 and an indoor fan motor 23. Further, the drying operation control device 24 controls the midnight power hours specified by the electric power company (from 23:00 to 7:00 on the next day) or the hours according to the hourly power rate system (from 23:00 to 7:00 on the next day and after 7:00). It consists of operation control that matches the daytime hours). Then, as shown in FIG. 1, the object to be controlled is connected as shown by a dotted line.

In the above construction, dehumidifying and drying in the bathroom is
A heating operation control up to a preset high temperature, a high temperature insulation operation at the high temperature setting temperature, a cooling and dehumidifying operation control for returning to a preset low temperature setting temperature, a low temperature insulation operation control for maintaining the temperature at the low temperature setting temperature, and Drying operation control is configured by repeating control from heating operation control to the high temperature keeping operation control, the cooling / dehumidifying operation control, the low temperature keeping operation control, and the heating operation control, and the bath exhaust heat in the drying operation control is stored in the hot water storage Bath 11 and bath waste heat as a heat source for bathroom drying Hot water storage tank Dry heating operation control and bath drying waste heat storage tank 11
The bath dry exhaust heat storage hot water tank heating operation control as the heating heat source is performed. Alternatively, according to the drying operation control, the bath exhaust heat is used as a heating heat source for the drying chamber, and the bath exhaust heat drying heating operation control is used, and the bath drying exhaust heat is used as a heating heat source for the hot water storage tank. Repeated operation control of the bath exhaust heat dry heating operation control and the bath dry exhaust heat hot water storage tank heating operation control is performed, and at the same time, the dry heating amount or the hot water storage tank heating amount due to the exhaust heat of the bath is increased. In addition to waste heat, waste heat from cooling and dehumidifying in the bathroom is also recovered and reused as the heat quantity for heating the hot water in the hot water storage tank. Therefore, high-temperature heating and high-performance dehumidification improve the drying rate, and the energy saving effect by using waste heat can be obtained.

[0016]

As described above, the following effects can be obtained by the heat pump drying water heater utilizing the waste heat of the bath of the present invention.

(1) Dehumidification / drying of a bathroom is performed by heating operation control up to a set high temperature setting, high temperature keeping operation at the high temperature setting temperature, cooling dehumidifying operation control returning to a preset low temperature setting temperature, and the low temperature setting temperature. Since the low-temperature heat-retaining operation control and the heating operation control from the high-temperature heat-retaining operation control, the cooling / dehumidifying operation control, the low-temperature heat-retaining operation control, and the drying operation control by the repeated control to the heating operation control are configured, An increase in heating amount, high temperature heating, and an increase in dehumidifying amount can be expected, and at the same time, the dry finish is improved.

(2) Bath exhaust heat drying and heating operation control in which the bath exhaust heat is used as the heating heat source for the drying chamber and bath dry exhaust heat is used as the heating heat source in the hot water storage tank according to the drying operation control Repeated operation control of the operation control, the bath exhaust heat dry heating operation control and the bath dry exhaust heat hot water tank heating operation control is performed, and the dry heating amount or the hot water tank heating amount is increased, and the exhaust heat is used as the hot water tank heating. Since it is reused, the amount of heat for heating the stored hot water and the energy saving effect are obtained.

(3) Since the operation is performed in conformity with the midnight power time zone specified by the electric power company or the time zone of the seasonal electricity charge system, the feature that the running cost is low can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a heat pump drying water heater using bath exhaust heat according to an embodiment of the present invention.

FIG. 2 is a block diagram in which the configuration of FIG. 1 in the same water heater is expanded along a flowing coolant.

FIG. 3 is a block diagram of a control system of the water heater.

FIG. 4 is a block diagram of a conventional heat pump dryer.

[Explanation of symbols]

1 compressor 2 Hot water tank water heat exchanger 3 first four-way valve 4 second four-way valve 5 First expansion valve 6 third four-way valve 7 Drying indoor unit 8 Second expansion valve 9 outdoor heat exchanger 10 bath water heat exchanger 11 Hot water storage tank 12 Hot water tank water circulation pump 13 bathtub 14 Bath water circulation pump 15 First indoor heat exchanger 16 Third expansion valve 17 Second indoor heat exchanger 18 First check valve 19 Fourth expansion valve 20 Second solenoid valve 21 Second check valve 24 Drying operation control device A bath waste heat storage hot water tank drying and heating circuit B Bath dry heat exhaust hot water storage tank heating circuit C bath exhaust heat drying drying circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location F24D 17/00 F24H 1/00 F26B 9/02 A 9140-3L 6909-3L F24D 17/00 G 9251 -3L F24H 1/00 313B

Claims (3)

[Claims] 1. A hot water storage tank drying and heating circuit that uses the waste heat of the bath to recover the heat from the bath and use it as a heating source for the hot water in the bathroom The hot water storage tank heating circuit using the bath dry waste heat used as a bath heating source, the heating operation control up to a preset high temperature inside the bathroom, and the high temperature keeping operation control for maintaining the high set temperature Cooling / dehumidifying operation control for returning the preset temperature to the preset low temperature setting temperature, subsequently low temperature keeping operation control for keeping the temperature at the low temperature setting temperature, again the heating operation control for the high temperature keeping operation control, and then the cooling dehumidification operation A heat pump dry water heater using bath waste heat, which is configured by a control and a drying operation control device which is repeatedly performed from the low temperature keeping operation control to the heating operation control. 2. A heating source for a hot water storage tank, which simultaneously recovers the bath exhaust heat and the cooling exhaust heat from the bathroom by collecting the bath exhaust heat and using it as a heating source for drying the inside of the bathroom. A heat pump drying water heater using bath waste heat that consists of a hot water storage tank heating circuit used as a bath. 3. The use of bath exhaust heat according to claim 1 or 2, wherein the dry operation control device is configured to include operation control that matches a midnight power time zone specified by a power company or a time zone of an hourly power rate system. Heat pump dry water heater.