JPH0526512A - Bath water temperature control type heat pump water heater - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a bath hot water temperature control type heat pump water heater that heats from an initially warm initial value of hot water to a high heat retention temperature during bathing to bathing. At the same time as taking a bath, it has a control to enter the cooling operation to return to the initial hot water temperature for the next bather, and an energy-saving function that reuses the exhaust heat at the time of cooling as the heating energy of the hot water storage tank, and a comfortable bathing mode. I will provide a. [Structure] A bath and hot water tank heating circuit that heats a hot water storage tank 3 and a bath 4 through a first hot water storage tank first refrigerant water heat exchanger 1 and a bath second refrigerant water heat exchanger 2; A hot water tank boiling circuit in which hot water heated in a tank heating circuit is circulated in the hot water tank 3 by a first water circulation pump 5 to boil it, and a bath water circulation in which a hot water heated in a hot water tank is circulated in the bath water 4 to be boiled by a second water circulation pump 6. It is composed of a circuit and a bath hot water temperature operation control device for controlling them, and has a function of heating and cooling the bath hot water and utilizing the exhaust heat at the time of cooling for hot water supply.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water temperature control type heat pump water heater which is capable of comfortably bathing by controlling bath hot water temperature, and has a bath hot water temperature control type heat pump hot water supply system capable of expanding the heating capacity of a hot water storage tank and improving system efficiency. .

[0002]

2. Description of the Related Art There is no conventional system of this kind, and there are fully automatic hot water heaters such as gas heaters and heat pump type bath heaters as a bath warming heater or a reheating machine, and these methods cool the bathtub and lower the hot water temperature. It was developed for the purpose of preventing The main control of this is ON-OFF operation of heating.

[0003]

However, the above-mentioned conventional bath reheating machine is designed to reheat the bath so that the temperature of the hot water in the bath is always kept warm. In addition, as a conventional bathing method, a method of warming the body while raising the heat retention set temperature during bathing is also taken. However, in any case, the amount of heating is too large and the local high water temperature from the spout of the bath often touches the body, forcing uncomfortable bathing, and the hot water temperature is high. In some cases, the next person to enter the bath had to be soaked after pouring water to lower it. On the other hand, conventional heat pump water heaters require a supplementary heat source such as an electric heater because the outside air temperature is low, especially in winter, and the heat collected from the outside air often does not go as expected, resulting in high running costs. There was a problem of becoming.

The present invention solves the above-mentioned conventional problems, and an object thereof is to combine hot water heating and cooling by a heat pump.

[0005]

In order to solve the above problems, the bath water temperature control type heat pump water heater of the present invention, in addition to heating the hot water tank and reheating the bath, from individual bathing to bathing. In order to comfortably take a bath in the process, the temperature of the hot water is controlled by a cooling operation that heats the body from a warm initial temperature to a high heat retention temperature where the body warms and returns to the warm initial temperature for the next bather, and exhaust heat during cooling. It is provided with a control device for reusing the above as the amount of heat for heating the hot water storage tank.

[0006]

According to the present invention, as shown in FIG. 2, the present invention detects the bathing action and warms the water in a warm water state, that is, heats from the preset low temperature preset temperature to reach the preset first high temperature preset temperature. To warm the body while raising the temperature of the bath, and to temporarily wash the body, go out of the bathtub and at the same time suspend the high-temperature heating operation, and then cool it down to a moderately low intermediate temperature retention set temperature to make it easier to take a bath next time. Then, switching to the middle temperature keeping operation is performed at the middle temperature keeping set temperature. In addition, in order to finally relax and warm the body, simultaneously with the bathing operation, the heating operation is continued while warming the body until it reaches the preset second high temperature preset temperature at the same time as the bathing operation and the high temperature heating operation at the same time as the bathing. To be done. At a higher temperature, ON / OFF or capacity control of the compressor for keeping the temperature for a certain period is performed at the second high temperature keeping set temperature in order to continue relaxing for a while. Further, after warming the body, at the same time as taking a bath, the cooling operation is started so as to reach the above-mentioned low temperature keeping set temperature in order to return to the state where the next person can easily enter. The bath hot water temperature control cycle is repeated according to such bathing behavior. On the other hand, during the cooling operation in the course of the bath hot water temperature control cycle, operation control is performed in which the exhaust heat is reused as the amount of heat for heating the hot water storage tank.

[0007]

Embodiments of the present invention will be described below with reference to FIGS. In FIG. 1, a bath hot water temperature control type heat pump water heater is a first refrigerant water heat exchanger 1 for heating water in a hot water storage tank 3.
And a hot water storage tank heating circuit A for heating the hot water storage tank 3 and the bath 4 by the second refrigerant water heat exchanger 2 for heating the water in the bathtub 4.
And the hot water heated in the bath and hot water tank heating circuit A,
A hot water tank boiling circuit B that circulates and boils the hot water tank 3 with a first water circulation pump 5, and a bath water circulation circuit C that similarly circulates hot water to the bath 4 by a second water circulation pump 6 and a bath water temperature. Second preset high temperature insulation temperature T
4 (FIG. 2), the exhaust heat is pumped up in the process of cooling to the low temperature keeping set temperature T1 and is used as a heat source for heating the hot water storage tank 3. The bath exhaust heat recovery hot water storage tank heating circuit D and the hot water storage tank heating circuit A The bath exhaust heat recovery hot water tank heating circuit, the hot water tank boiling circuit B, and the bath water circulation circuit C are operated to control the bath hot water temperature control device 15.

First of all, the heating circuit A for the bathtub and hot water storage tank has a compressor 7,
First water heat exchanger 1, first four-way valve 8, second water heat exchanger 2,
The second four-way valve 9, the first expansion valve 10, the outdoor heat exchanger 11, the first four-way valve 8, the second four-way valve 9, and the compressor 7 are connected by a refrigerant pipe. In addition, the bath heat recovery system hot water tank heating circuit D
Is compressor 7, first water heat exchanger 1, first four-way valve 8, second four-way valve 9, first expansion valve 10, outdoor heat exchanger 11, first four-way valve 8, second water heat The exchanger 2, the second four-way valve 9, and the compressor 7 are switched in the order of the first and second four-way valves 8 and 9 to form a refrigerant passage. The hot water tank boiling circuit B is configured by connecting a hot water tank 3, a first water circulation pump 5, a first water heat exchanger 1 for exchanging heat of a refrigerant to water, and a hot water tank 3 by water pipes. The bath water circulation circuit C is configured by connecting a bath 4, a second water circulation pump 6, a second water heat exchanger 2 for exchanging heat of the refrigerant to water, and a bath 3 so that the water circulates.

The bath hot water temperature operation control device 15 controls the hot water tank boiling circuit B according to the output of the boiling temperature sensor 12 provided on the outlet wall of the first water heat exchanger 1. The hot water storage tank control circuit 13, the bath water circulation control circuit 14 for controlling the operation of the bath water circulation circuit C, and the bath / hot water heating circuit A are operated to start from the low temperature keeping preset temperature T1 (FIG. 2) provided in advance. High temperature insulation set temperature T2 (Fig. 2)
To the first high temperature insulation set temperature T2.
To keep the temperature in the heat-retaining state, and further activate the bath exhaust heat recovery hot water storage tank heating circuit D to temporarily raise the temperature from the bath 4 and cool it to a preset intermediate-temperature heat-retention set temperature T3 (FIG. 2) to keep the temperature low. At the same time, in order to finally relax and warm the body, at the same time as re-bathing, the bath and hot water tank heating circuit A is activated again to heat to the second high temperature insulation set temperature T4 to keep it warm, and at the same time as the bathing action, the next person It is configured to have a repetitive operation mode of cooling to the low temperature keeping set temperature T1 in accordance with the bathing.

Further, the bath water temperature operation control device 15 includes
Bath and bath detection sensor 16, bath hot water temperature detection sensor 17 installed in bathtub 4, and operation and capacity of said second water circulation pump 6 according to outputs of said bath and bath detection sensor 16 and said bath hot water temperature detection sensor 17. The bath water circulation control circuit 14 is operated so as to control the water temperature, and the boiling temperature sensor 1 provided at the outlet of the first water heat exchanger 1 is controlled.
2. The hot water tank control circuit 13 operates so as to control the operation and capacity of the first water circulation pump 5 according to the output of the boiling temperature sensor 12.

Further, as shown in FIG. 2, the bath hot water temperature operation controller 15 outputs the bath hot water bath temperature detecting sensor 16 which operates in response to the hot water bathing operation to set the bath hot water temperature to a low temperature keeping temperature T1 (about 36). (~ 39 ° C) until the first high temperature body temperature set temperature T2 (about 40 to 42 ° C) is reached, the bath heating mode for starting the operation of the bathtub / hot water tank heating circuit A, temporarily responding to the rising operation from the bathtub 4 The bath exhaust heat recovery for temporary cooling from the first high temperature insulation set temperature T2 to the middle temperature insulation set temperature T3 (about 38 to 41 ° C.) by the output of the rising bath detection sensor (which also functions as a bathing and bathing detection sensor) The bath exhaust heat recovery utilization mode in which the hot-water tank heating circuit D is operated, and the output of the bathing bath detection sensor 16 which operates in response to the bathing operation in the bathtub 4 again is controlled by the bath temperature of the bath water. From T3 second hot temperature thereof set temperature T
The bath heating / bathing detection sensor 1 which operates in response to the bath heating mode in which the bath / cumulative bath heating circuit A is again operated until the temperature reaches 4 (about 42 to 44 ° C.), and the bathing operation upon completion of bathing.
The control circuit for the bath exhaust heat recovery utilization mode, which enters the operation of the bath exhaust heat recovery hot water storage tank heating circuit D in order to return from the second high temperature warm body preset temperature T4 to the low temperature retention preset temperature T1 again by the output of 6, It is configured to have. Further, the operation of the bathing bath sensor 16 is carried out by taking into consideration the output change that appears in response to the shielding of the incoming light by opening and closing the bath lid. This is the operation of detecting the bathing and bathing behavior. The method of detecting the action of temporarily rising from the bath is operated by taking into consideration the change in the amount of light in the process of rising from the bath and entering a stable state due to the fluctuation of the light caused by the shaking of the water or the movement of the human body when going up from the bath.

Further, the bath hot water temperature control boiling operation control device 14 controls the bathing operation according to the individual's preference, together with the bath hot water temperature from the low temperature preset temperature T1 to the first high temperature preset temperature T.
It also has a continuous bath heating mode in which the bath hot water heating tank heating circuit is skipped to increase the temperature to the second high temperature temperature setting temperature T4 all at once. Here, at the time of a cooling operation for returning the first high temperature warm body preset temperature T2 to the intermediate warm temperature preset temperature T3 or the second high temperature warm body preset temperature T4 to the low temperature warm preset temperature T1, the exhaust heat thereof heats the hot water tank. It also has operation control of the bath exhaust heat recovery hot water storage tank heating circuit in order to utilize it for the amount of heat.

[0013]

As described above, according to the bath water temperature control type heat pump water heater of the present invention, the following effects can be obtained.

(1) In the beginning of bathing, there is little discomfort to the body that is cold due to undressing because the temperature of the hot water is a low temperature, and the elderly and infants warm up gradually. It can be expected to be effective for bathing in people with high blood pressure and those with a weak heart.

(2) After bathing, the body is warmed by keeping it at the first high-temperature heat retention set temperature for a while or until it reaches the first high-temperature heat retention set temperature, and at the same time, it is temporarily cooled to the middle-temperature heat retention set temperature at the same time as getting out of the bath. As a result, there is little discomfort to the body that has cooled down a little even when taking a bath again.

(3) When returning from the first high-temperature heat retention set temperature to the medium-temperature heat-retention set temperature or when returning from the second high-temperature heat-retention set temperature to the low-temperature heat-retention set temperature for the next person, the waste heat is stored in the hot water storage tank. Since the bath exhaust heat is used for the amount of heat to be heated and the hot water storage tank is heated at the same time, the heat pump hot water supply capacity in winter, which was not sufficient just by collecting atmospheric heat, can be further increased.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a bath water temperature control type heat pump water heater according to an embodiment of the present invention.

[Fig. 2] Temperature pattern diagram of bath water temperature control of the water heater

[Explanation of symbols]

1 First water heat exchanger 2 Second water heat exchanger 3 hot water storage tank 4 bathtub 5 First water circulation pump 6 Second water circulation pump 7 compressor 8 first four-way valve 9 Second four-way valve 12 Boiling temperature sensor 13 Hot water tank control circuit 14 Bath water circulation control circuit 15 Bath water temperature operation control device 16 Bathing bath detection sensor 17 Bath hot water temperature sensor

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location 6909-3L F24D 17/00 G

Claims (5)

[Claims] 1. A bathing mode in which the bath hot water temperature is maintained at a preset low temperature heat retention temperature before bathing, the bath is heated to a high temperature heat retention preset temperature set in advance together with bathing, and after bathing, the temperature is maintained by cooling to the low temperature heat retention preset temperature. A bath hot water temperature control type heat pump water heater comprising a bath hot water temperature operation control device. 2. A hot water tank and a hot water tank heating circuit for heating hot water by a first refrigerant water heat exchanger for hot water tank and a second refrigerant water heat exchanger for bath, and the hot water tank and hot water tank heating circuit. The hot water heated in the hot water tank is circulated by the first water circulation pump in the hot water tank to boil, the bath water circulation circuit in which the hot water is circulated in the bath water by the second water circulation pump, and the bath water in the bathing mode. The bath hot water recovery hot water storage tank heating circuit for pumping the cooling waste heat and utilizing it as a heat source for heating the hot water storage tank in the process of cooling the temperature from the high temperature warming preset temperature to the low temperature warming preset temperature. Bath water temperature control type heat pump water heater. 3. A bath hot water temperature operation control device, a bath hot water detection sensor installed in a bathtub, a bath hot water temperature sensor installed in a second refrigerant water heat exchanger, and the bath hot water detection sensor and the A bath water circulation control circuit that controls the operation and capacity of the second water circulation pump according to the output of the bath water temperature detection sensor, a boiling temperature detection sensor disposed at the outlet of the first water heat exchanger, and the boiling temperature The bath hot water temperature control type heat pump water heater according to claim 1 or 2, which is configured to have a hot water tank boiling control circuit that controls the operation and capacity of the first water circulation pump according to the output of the detection sensor. 4. The bath hot water temperature operation control device uses the output of a bathing bath detection sensor which operates in response to a bathing operation until the bath hot water temperature reaches a first high temperature warming set temperature from a preset low temperature warming temperature of the bath hot water. Also, the bath heating mode to enter the operation of the hot water tank heating circuit, the bath rising detection sensor that operates in response to the action of temporarily rising from the bathtub, and the bath exhaust heat recovery to enter the operation of the hot water tank heating circuit for temporary cooling In the recovery use mode, the bathtub is re-entered by the output of the bathing bath detection sensor that operates in response to the bathing action to enter the bathtub again until the bath water temperature reaches the preset second high temperature retention temperature. In addition, the bath heating mode for entering the operation of the hot water tank heating circuit and the output from the bathing detection sensor which operates in response to the bathing operation upon completion of bathing are used to return from the second high temperature preset temperature again. The bath hot water temperature according to claim 1, 2 or 3, which comprises a control circuit for the bath waste heat recovery utilization mode in which the bath waste heat recovery hot water storage tank heating circuit is operated until a low temperature retention temperature is reached. Controlled heat pump water heater. 5. The bath hot water temperature operation control device is a bathtub / hot water storage tank from the low temperature keeping temperature of the bath hot water to the second high temperature keeping set temperature by the output of the bathing bath detection sensor which operates in response to the bathing operation. The bath heating mode in which the heating circuit enters into continuous operation, and the bathtub until the temperature reaches the low temperature retention temperature again from the second high temperature retention temperature set by the output of the bathing detection sensor that operates in response to the bathing operation upon completion of bathing 3. The control circuit for the bath exhaust heat recovery utilization mode, which enters the operation of the exhaust heat recovery hot water tank heating circuit, according to claim 1 or claim 2.
Alternatively, the bath hot water temperature control type heat pump water heater according to claim 3.