JPS62258951A - Heat pump type automatic bath system - Google Patents

Abstract

PURPOSE:To obtain hot-water of proper temperature and proper amount by a simple operation upon filling initially a bathtub with water by a method wherein the title bath system is provided with a temperature keeping control means, which heats hot-water in the bathtub by a heat exchanger for the bathtub when a detected hot-water temperature has become lower than the range of a set hot-water temperature and maintains the hot-water temperature within the range of the set hot-water temperature. CONSTITUTION:A heat source side unit 1 is equipped with a compressor 23, circulating and flowing refrigerant through a heat source side heat exchanger 22 and a heat exchanger 8 for a bathtub. When hot-water of a set temperature is obtained initially to a set level after starting the title system by a bath operating switch 34, the finishing signal of hotwater filling, which comes from a CPU 31 for the bathtub, is inputted into an outdoor side CPU 36 in an outdoor unit 1. Responding to the signal, a temperature keeping control means effects heating by the heat exchanger 8 for the bathtub by the operation control of four-way switching valves SV1, SV2 and electric expansion valves EV0, EV1, EV2, EV3 as well as the driving of the compressor 23 and an outdoor fan 22a when a detected hotwater temperature detected by a hot-water temperature sensor 16 has become lower than the range of a set hot-water temperature, whereby the detected hot-water temperature may be maintained within the range of the set hot-water temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat pump type automatic bath device for obtaining hot water at an appropriate temperature and appropriate m in a bathtub.

(Prior Art) Techniques for initial thirst to obtain hot water at the appropriate temperature and amount in a bathtub, and techniques for obtaining hot water at an appropriate temperature after initial filling are generally disclosed in Japanese Patent Application Laid-Open No. 59-69648. Otsu's power (known) as described in

According to this conventional example, the hot water in the bathtub flows through the bathtub circulation pipe.
The circulation pump is activated when the temperature rises above the L-side pipe, and after that, the water temperature goes up to the hot water temperature sensor and detects the hot water temperature.
Heating was controlled using a gas heating method based on the detected hot water temperature and the set hot water temperature, and it was possible to obtain the right temperature and the right amount of water at the initial stage of thirst.

After the initial thirst, if the water temperature is lower than the set temperature when taking a bath, an appropriate time is set artificially using a timer, and heating is performed for the set time, which is what is called reheating. .

(Problems to be Solved by the Invention) However, in the case of the conventional example having such a configuration, hot water at the set hot water temperature is obtained only at the initial lag, which is the initial stage of hot water supply.

Also, when it takes a long time to take a bath after the hot water supply is completed, or when there is a long time interval between bathing, the temperature of the water decreases when taking a bath, or the temperature of the water decreases as you take a bath. In some cases, the timer must be set and reheated at the same time as bathing, and it takes time for the water to reach the appropriate temperature. This was a practical inconvenience, as the patient had to wait until it became cold, and sometimes caught a cold.

The present invention was developed in view of the above circumstances, and it is possible to not only obtain the appropriate temperature and amount of hot water at the time of initial filling with a simple operation, but also to save energy even after the initial filling is completed. The purpose is to provide hot water at an appropriate temperature at all times with good usage efficiency and high durability.

(Means for solving the problems) The heat pump type automatic bath device of the present invention has the following features:
] In order to achieve the objective, a heat pump type bathtub heat exchanger (8), a heat source side heat exchanger (22), the heat source side heat exchanger (22), and the bathtub heat exchanger (8) are used. and a compressor (23) that circulates and flows refrigerant over the bathtub (34). ); and a hot water temperature sensor (1) that detects the temperature of the hot water in the bathtub (3).
6), and in response to the hot water filling completion signal, the hot water temperature sensor (16)
) when the hot water temperature detected by the hot water temperature sensor (16) becomes lower than a set temperature range, heating is performed by the bathtub heat exchanger (8) to maintain the hot water temperature detected by the hot water temperature sensor (16) within the set temperature range. and means.

(Function) According to this configuration, by starting the bath operation switch (34), an appropriate amount of hot water at an appropriate temperature is obtained by mixing hot water from the hot water tank with city water, or an appropriate amount of water is supplied to the bathtub. Later, when the initial hot water filling means, such as heating the hot water to the right temperature using a heating device such as a gas heating device, can obtain the right amount of hot water at the right temperature, if the hot water temperature subsequently falls below the set temperature range, the heat retention control is activated. The means automatically operates to heat the bathtub using a heat pump type heat exchanger (8), so that the hot water in the bathtub (3) can always be maintained at an appropriate temperature.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is a system configuration diagram of a heat pump automatic bath device according to an embodiment of the present invention.

In this figure, 1 is an outdoor unit as a unit on the woman's side, 2 is a unit that supplies water and hot water at a predetermined ratio into a bathtub 3,
4 is a heat pump type bathtub unit for maintaining the water temperature in the bathtub 3 at the set water temperature after the initial water filling control is completed. 6 is an indoor unit for heating, cooling and air conditioning the room, and 7 is a hot water tank unit.

The bathtub unit 2 includes a heat pump type bathtub heat exchanger 8 and a circulation pump that circulates hot water in the bathtub 3 to the bathtub heat exchanger 8 through a circulating pipe and an eve 9! 0, a hot water pipe 12 that supplies the water from the hot water storage tank unit 7 via a hot water valve IK, a water pipe I4 that supplies city water via a water valve 13, and a hot water pipe 12 and a water pipe 14, respectively. A mixing tank 15 for mixing pigeons and water is provided.

Further, a hot water temperature sensor 16 is provided on the suction side of the circulation pipe 9 from the circulation pump 10.

An operation permissible water level sensor is located on the inner wall of the mixing tank 15 at a location corresponding to the level where the upper side of the circulation vibrator 9 communicates with the bathtub 3, and detects the water level 110 that allows the operation of the circulation pump IO. and set water level sensors Ll, L2 . which detect three stages of set water levels 11 I-1, HM, HL, located at a predetermined interval in the vertical direction near a point corresponding to the level during normal bathing. ! -3 is attached.

These water level sensors L. , r7xLt, and 1-j are each composed of a positive characteristic thermistor.

The hot water tank unit 7 includes a hot water tank 17, a hot water tank heat exchanger 18, and a valve that opens to supply water when the water level in the hot water tank 17 drops below a set water level, and closes when the water level reaches the set water level. A ball tap 19 that automatically stops water supply and a hot water pump 2I that supplies hot water from the hot water storage tank 17 are provided.

As shown in the refrigerant circuit diagram of FIG. 2, the outdoor unit l includes an outdoor heat exchanger 22 as a heat source side heat exchanger, an outdoor fan 22a, a compressor 23 for circulating refrigerant, and a liquid receiver 2.・1, accumulator 25.25, first and second
Four-way switching valves s v , s v ,, 1st to 41st
u-dynamic expansion valve E ■, , EV , , EV 2. E■□
, first and second liquid shutoff valves V, ,V,, first and second
Gas shutoff valve V3. V, and reverse IL valve v5 is 6i
ii.

Each of the indoor units 6.6 is equipped with an indoor heat exchanger 26 and an indoor fan 27.

The bathroom heating unit 4 also includes a bathroom heating heat exchanger 2.
8 and a blower fan 29.

In FIG. 1, 30 is a ventilation fan for ventilating the inside of the bathroom s.

The first and second four-way switching valves sv, sv2, and the first to fourth electric expansion valves EVO, EVl, EV
Each of T and E V is configured to be automatically controlled by a control means, and the operation is controlled as shown in the following table to enable easy feeding operation mode, heating operation mode, reheating/drying mode, etc. (bath heating) operation mode, cooling operation mode, (heating + cooling) operation mode in which hot water is supplied and heated while cooling exhaust heat can be used for flI, hot water in the bathtub 3 for collecting remaining hot water exhaust heat and cooling. An operation mode that recovers heat and heats the hot water using the recovered heat (hot water supply + bath waste heat recovery), and performs heating and reheating/drying in parallel (heater bath heating) operation. mode, heat recovery from the hot water in the bathtub 3 for cooling and cooling are performed in parallel (
The cooling mode (10 bath exhaust heat recovery) operation mode, and the recovery of residual hot water exhaust heat and the heat recovery of the water inside the bathtub 3 for cooling, and the hot water supply heating in a state where the recovered heat can be used. In addition, it is possible to select one of the operation modes in which cooling is performed in parallel (water heater cooling + bath waste heat recovery).

(Hereinafter, blank space) Next, the state during operation in the reheating/drying operation mode according to the present invention will be described.

*For compression during operation in reheating/drying operation mode, 23 discharge ports 23a → 1st four-way switching valve S□・”'
v+ (solid line) - second four-way switching valve 5vtc broken line) - first gas closing valve V, - bathroom heating heat exchanger 28 - bathtub heat exchanger 8 - fourth electric expansion valve EV3 (FD) - first Liquid closing valve V
1-liquid receiver 24-first electric expansion valve EV.

(SH) - Outdoor heat exchange r522 - 2nd four-way switching valve SV
, (broken line) - forms a circulating refrigerant flow path with the accumulator 25.25 → the suction port 23b of the compressor 23, and by the operation of the compressor 23 and the driving of the circulation pump 9 or the two blower fans, the outdoor heat is removed. The amount of heat absorbed from outside by the exchanger 22 is radiated to the pigeon in the bathtub 3 by the bathtub heat exchanger 8, or is radiated into the bathroom 5 to reheat the bath. The bathroom 5 can be heated or used as a drying room for laundry, etc.

[QFfl! k'Fr? “f Ti
1l * 17 =' k h n * i
:1 71/ Ih Jy '1)-11-f.

,■71. ! 73. (1) When the water level detection signals from each of 3 and 3 and the temperature signal from the hot water temperature sensor 16 are input to the bathtub CPU 31, the water temperature setting switch section 32 sets the temperature range of the hot water in the bathtub 3. The signal, the water level setting switch 33 that sets the amount of hot water in the bathtub 3, and the operation signal from the bath operation switch 34 are stored in a key matrix 35.
Based on these signals, the first relay coil It l drives the circulation pump IO, the second relay coil It 2 operates to open the hot water supply valve 11, and the water supply A drive signal is output to each of the third relay coils R3 that operate by opening the valve 13, and the hot water is filled with water upon completion of the 13th period of hot water filling by the hot water filling control means. Outputs a completion signal and asks if the hot water is hot after the hot water is filled. +li allowance will be given. Note that the setting by the water temperature setting switch section 32 and switching between easy temperature and easy temperature are performed by operating the heating switches S to V after changing the set water temperature.

The filling completion signal from the bathtub CPU 31 is manually input to the outdoor side CI U 36 in the outdoor unit I, and in response to the filling completion signal, the heat retention control means sets the hot water temperature detected by the hot water temperature sensor 16. When the temperature falls below the temperature range, the first and second four-way switching valves sv, sv,
and the first to fourth electric expansion valves EV o, EV
iE V t, E V *L: performs operation control for and drives the compressor 23 and outdoor fan 22a, respectively, and performs heating by the bathtub heat exchanger 8,
The hot water temperature detected by the hot water temperature sensor 16 is maintained within a set temperature range.

Next, the operations of the hot water level control means and the heat retention control means will be explained using the flowchart shown in FIG. 4.

First, as shown in FIG. 4(a), the bath operation switch 3 is turned on.
Turn on 4 to start operation (St), hot water supply valve Il and water supply valve! 3 is opened (turned ON), and the forget-to-turn-off prevention timer is activated. This timer to prevent forgetting to turn off is built into the bathtub CPU 31, and is set to, for example, 6 hours, and after 6 hours has passed, it is reset by turning off the bath operation switch 34. It is now possible to do so.

Next, the level that allows the operation of the circulation pump lO! ■0
The water level sensor checks whether water is available or not. determine whether a water level signal is detected from
The above acceptable level! (Wait until it becomes 0 (S3).

After reaching the permissible level IO, determine whether the water level has reached the initially set water level (water level till, lIM, water level at any of the water levels in the back of eye 7) ・4-
(S4).

Immediately after reaching the allowable level 110, the set water level is not reached, so the process moves to step S5 and the circulation pump IO
Start operation.

After this, in the process from step S6 to step S13, the hot water level is controlled. The hot water supply valve II and the water supply valve 13 are respectively opened and closed according to each low state to obtain an appropriate amount of hot water within a set temperature range.

That is, for the water supply valve 13, the setting temperature is 0.5 to
A differential is provided within a range of 1.5 degrees Celsius lower, and when the water temperature rises beyond a temperature 0.5 degrees Celsius lower than the set temperature, the water supply valve 13 is opened, and the water temperature is 1.5 degrees lower than the set temperature.
The water supply valve 13 is configured to close when the temperature drops below the set temperature, and the hot water supply valve 11 is configured to close the water supply valve 13 when the temperature drops below the set temperature. A differential is provided within the range, and when the hot water temperature drops to 1.0°C lower than the set temperature, the hot water supply valve 11 is opened, and the hot water temperature is 60.5°C lower than the set temperature.
The hot water supply valve 11 is configured to be closed when the temperature rises above a high temperature, and an appropriate amount of hot water at an appropriate temperature is obtained while minimizing the opening/closing frequency of each of the water supply valve 13 and the hot water supply valve 11.

To explain step by step, after the circulation pump 10 starts operating,
The hot water temperature set by the hot water temperature setting switch section 32 is subtracted from the hot water temperature detected by the hot water temperature sensor I6, and the noni temperature difference is -1.
, check whether the temperature is lower than 5℃ (S6), and if it is, close only the water supply valve 13 (0FF) and then (S6).
7), return to step S4.

If it is determined in step S6 that the temperature difference is greater than -1.3'C, the process moves to step S8 and it is determined whether the temperature difference obtained by subtracting the set hot water temperature from the detected hot water temperature is 6 greater than 0°5°C. However, when it is determined that the temperature is too high, only the hot water supply valve 11 is closed (OFF) as the hot water is warm or high temperature.
S9), return to step S4 4゛.

In step S8 of 1jif, :R1 degree difference is 0.5
If you want to judge that it is 6 less than ℃, go to step SIO one more time and calculate the temperature difference by subtracting the set hot water temperature from the detected hot water temperature.
It is determined whether the temperature is higher than 0.5℃, and when it is determined that it is higher, the water supply valve 13 is opened (ON) and then (Sl
l), return to step S4.

11; In step SIO of step j, the temperature platen is 105°
When it is determined that the temperature difference is 6 less than C, the process goes to step SI2 at line t3, and it is determined whether the temperature difference obtained by subtracting the set hot water temperature from the detected hot water temperature is less than -1.0°C, and when it is determined that it is small, Open the hot water supply valve 11 (ON) and then turn it on (S).
+3), return to step S4.

Here, if it is determined that the temperature difference is greater than -1.0°C, the process returns to step S4.

When it is determined in step S4 that the water level has reached the set water level, it is assumed that the initial hot water filling means has completed filling the hot water, and the process proceeds to step S14, where the hot water supply valve 1
1 and water supply valve 13 (turn OFF)
, after which the process moves to step S+5.

Through these processes from step S2 to step S14, a set amount of hot water is filled into the bathtub 3 within the set temperature range from 0.5°C higher than the set temperature control to 1.5°C lower. Initially, the ease means is configured to supply. At this time, a hot water filling completion signal is output from the bathtub CI U31 to the outdoor side CPU36.

In step S15, as shown in FIG. 4(b), it is determined whether the forget-to-turn-off prevention timer has timed up, that is, whether 6 hours have elapsed. Automatically cut (
OFF) state and stop the bath operation (S16).

If 6 hours have not passed, proceed to step S17,
To check whether the amount of hot water used during bathing has decreased below the set amount, determine whether the water level is at the set water level.

If the water level reaches the set level, it is determined whether the set time T minutes (for example, 15 minutes) have elapsed after heating the bath by reheating or cooling the water supply or the bathtub heat exchanger 8 at f1. do. Here, if heating or cooling is not performed, such as after the initial filling or replenishment of hot water, YE
Determined as S, the process moves to step S19, and the circulation pump IO
to drive.

If it is determined in step S18 that the set time has not elapsed, the process proceeds to step S20, where it is determined whether the heating switch has been turned on, that is, whether there has been a change to the set water temperature, and whether the heating switch has been turned on. If so, the process moves to step S19, and if it is not turned on, the process returns to step S15.

After operating the circulation pump 10 in step S19, it is determined whether the temperature difference obtained by subtracting the set water temperature from the detected water temperature by the hot water temperature sensor 16 is smaller than -0.5°C (521). If it is lower than -0°5°C, it is assumed that the water temperature is warm and low temperature, and the bath heating is turned on, that is, the reheating operation by the bathtub heat exchanger 8 is started (S22
).

After that, it is determined whether the temperature difference obtained by subtracting the set temperature control from the detected water temperature by the hot water temperature sensor 16 is greater than 0.5°C (523), and the process waits until the temperature difference becomes greater than 0°5°C. If it is determined that the heating has increased, the bath heating is turned OFF, that is, the reheating operation by the bathtub heat exchanger 8 is stopped, the circulation pump 10 is turned to 0FFL (S22), and the process returns to step S15. .

,,1 Through the processes from step S21 to step S24, a reheating operation is performed using the bathtub heat exchanger 8, and the heat retention control is set to maintain the water temperature in the bathtub 3 within the set temperature range. The means are configured.

In step S17, when it is determined that the water level is not the set water level, that is, when it is determined that the hot water has been used for bathing and has decreased from the set temperature m, the process returns to step S5 and is carried out in the same manner as in the initial bath water filling. , get the set amount of hot water within the set temperature range.

In step S21, if it is determined that the temperature difference obtained by subtracting the set temperature control from the detected hot water temperature by the hot water temperature sensor 16 is not smaller than -0.5°C, the process moves to step S25, and the process is shown in FIG. 4(C). As shown, it is determined whether the temperature difference obtained by subtracting the set temperature control from the hot water temperature detected by the hot water temperature sensor 16 is larger than 1.5°C, and when it is determined that it is large,
In other words, if you reset the water temperature to a lower temperature due to a mistake in changing the water temperature setting, if you reset the water temperature to a lower temperature because you prefer lower temperature water, or if the water temperature unexpectedly becomes high. In step S2G, the water supply valve 3 is turned on to cool the water jug.

Next, the process moves to step S27, and the temperature difference obtained by subtracting the set water temperature from the easy temperature detected by the hot water temperature sensor 16 is 0.5.
℃, and when it is determined that it is smaller, the process moves to step S28 to close (OFF) the water supply valve 13 and stop the circulation pump 1O (OFF) in order to finish cooling the water jug. Return to SI5.

In step S27, if it is determined that the temperature difference obtained by subtracting the set hot water temperature from the detected hot water temperature by the hot water temperature sensor 16 is greater than 0.5°C, 1. % line, determines whether the set time T minutes (for example, 3 minutes) have elapsed after starting water pitcher cooling, and if the set time has not elapsed, water pitcher cooling continues until the water temperature falls below the set temperature. continue.

If the water temperature does not fall below the set temperature after the set time has elapsed after the start of water pitcher cooling, the process moves to step S30, and the water supply valve 13 is closed (OFF) in order to end the water pitcher cooling.

After that, in order to perform cooling using a heat pump system (abbreviated as heat-bon cooling), the refrigerant circuit is connected to the discharge port 23a of the compressor 23 = the first four-way switching valve S V
, (solid line) - second four-way switching valve SV, (solid line) - outdoor heat exchanger 22 - first electric expansion valve EV.

(fully open) - Liquid receiver 24 - First liquid closing valve Vl - Fourth electric expansion valve EV3 - Bathtub heat exchanger 8 - Bathroom heating heat exchanger 2
8-First gas shutoff valve v3-Second four-way switching valve S V t
(Solid line) - Accumulator 25.25 = Switched so that the suction port 23b of the compressor 23 flows, and the compressor 23 is turned on to operate) (S31), In step S32, set from the hot water temperature detected by the hot water temperature sensor 16 Cooling is continued until it is determined that the temperature difference obtained by subtracting the hot water temperature has become smaller than 0.5°C.

If the temperature difference becomes smaller than 0.5° C., the compressor 23 is stopped (OFF) and the circulation pump 10 is also stopped (OFF) in order to finish Hebon cooling (533);
After that, the process returns to step S+5.

Furthermore, in step S25, the temperature difference obtained by subtracting the set water temperature from the water temperature detected by the water temperature sensor 16 is 1.5°C.
If it is determined that the value is smaller than , the process returns to step S15.

In the above embodiment, when one bath operation switch 3.1 is turned on, the initial hot water filling means supplies hot water at an appropriate temperature and amount, that is, initial hot water filling, subsequent heat retention control, and The system handles everything related to hot water replenishment, cooling when the hot water temperature setting is reset to a lower temperature due to a mistake, stopping the control operation after the set time has elapsed, and everything related to bath operation. Although an automated system is shown, the present invention is sufficient as long as it automates the initial thirst and the subsequent heat retention control at least by turning on the bath operation switch 34.

(Effect of the invention) As described above, according to the present invention, the bath operation switch (3
4) Although the operation is as simple as starting, it is not only possible to obtain hot water at Jllra and at an appropriate temperature at the initial level of thirst, but it also automatically controls the heat retention after the initial level of hot water. Now I can always take a comfortable bath in hot water at an appropriate temperature.

Furthermore, since a heat pump type bathtub heat exchanger (8) is used for heat retention control, energy usage efficiency can be improved. For example, Mtf
Heat the compressor (23) without hot water in l (3).
The pressure on the high pressure side of the machine may rise abnormally and the AI 1 machine (23) will automatically stop, or the machine may continue to operate without being stopped and burn out the coil, which will definitely reduce durability. can now be avoided.

[Brief explanation of drawings]

Fig. 1 is a system configuration diagram of a heat pump type automatic bathing device according to an embodiment of the present invention, Fig. 2 is a refrigerant circuit diagram, Fig. 3 is an electric circuit diagram, and Fig. 4 shows a hot water filling control means and its subsequent 3 is a flowchart illustrating the operation of the heat retention control means. l...Outdoor unit as a heat source side unit, 3...
・Bathtub, 8... Heat exchanger for bathtub, 16... Water temperature sensor, 22... Outdoor side heat exchanger as a heat source side heat exchanger, 2
3... Compressor, 2 (4... Bath operation switch.

Claims (1)

[Claims] (1) A refrigerant is circulated through the heat pump type bathtub heat exchanger (8), the heat source side heat exchanger (22), the heat source side heat exchanger (22), and the bathtub heat exchanger (8). A heat source side unit (1) equipped with a fluidizing compressor (23), a bath operation switch (34), and after starting by the bath operation switch (34), a set temperature is first set in the bathtub (3). An initial hot water filling means outputs a hot water filling completion signal when hot water reaches a set level, and a hot water temperature sensor (1) detects the temperature of hot water in the bathtub (3).
6), and in response to the hot water filling completion signal, the hot water temperature sensor (16)
) when the hot water temperature detected by the bathtub heat exchanger (8) becomes lower than the set temperature range, heating is performed by the bathtub heat exchanger (8) to maintain the hot water temperature detected by the hot water temperature sensor (16) within the set temperature range. A heat pump type automatic bath device equipped with a control means.