JPH086959B2 - Heat pump type bath water heating device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bath water heating device that heats and keeps warm bath water.

2. Description of the Related Art Conventionally, there is a device that heats bath water with a heat pump and circulates the bath water to return it to the bath in order to repeatedly use the hot water in the bath.

This type of bath water heating device has a bath controller provided with a bath temperature setting means for setting the bath water temperature, and a bath time setting means. Can be set freely.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional bath water heating device, however, since it is a heat pump, the heating capacity is reduced at low outside air temperature in winter, and it takes a long time to boil and use it. There was a problem that the person did not boil at the bath time set by the person. On the other hand, when it started to boil a long time ago, as if it had boiled at the time of bathing, in the summer when the heating capacity was large, it boiled too early, and unnecessary power was needed to keep it warm.

In view of the above problems, the present invention provides a comfortable and economical heat pump type bath water heating device throughout the year.

Another object of the present invention is to provide convenience to the user, such as allowing boiling up to the set hot water temperature rapidly even when the user wants to take a bath at a time other than the bathing time set by the user. Is.

Means for Solving the Problems In order to solve the above problems, the present invention provides a bath water temperature detecting means, a bath water temperature setting means, a bath time setting means, and a first time set by the bath time setting means. Output of a first timer means that outputs a predetermined time before and a second timer means that is set shorter than the first timer that outputs a second predetermined time before the time set by the bathing time setting means And a comparison operation unit for outputting a drive signal to the heater drive unit and the compressor drive unit to output the drive signal to the drive determination unit.

Further, in the present invention, heating setting means is added to the control device.

Action The action of the present invention having the above-described configuration is as follows.

According to the present invention, when the first predetermined time before the set bath time is reached, boiling is performed by the heat pump, after which time elapses, and when the second predetermined time is reached, the heater is energized and the heat pump is put out together. This shortens the boiling time. In other words, by using a heat pump in the summer to reduce the heating capacity of the heat pump in the winter, a heat pump and a heater are used together, so it is economical without using unnecessary power. Will be there.

Further, the present invention, by setting the heating setting means, such as when bathing in the bathing time zone which has not been set,
It uses an instant heat pump and a heater to boil up to the set hot water temperature in a short time.

Examples Hereinafter, one example of the heat pump bath water heating apparatus of the present invention will be described with reference to the accompanying drawings.

First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3 and 6.

FIG. 1 shows the overall configuration of the apparatus. In FIG. 1, 1 is a bathtub, 2 is a bath water heating apparatus for purifying and sterilizing bath water in the bathtub 1, and further heating and heating for reuse. An electric heater for keeping the bath water warm in the bath water heating device 2, and a bath heat exchanger 4 for exchanging heat with the bath water for heating. The suction port 5 and the jet port 6 provided in the bathtub 1 are connected to the bath water intake port 7 and the bath water return port 8 provided in the bath water heating device 2 through a return pipe 9 and a forward pipe 10, respectively. There is. Further, in the bath water heating device 2, a filter tank 12 having a filter 11, a circulation pump 13, a sterilization treatment device 14,
A filter tank 16 having a filter stone 15 is provided. The electric heater 3 is provided below the filtration tank 16. The bath heat exchanger 4 is formed by spirally winding a heat exchange pipe around the filter stone 15 in the filtration tank 16. 17 is a bath controller for changing the bathing time and bath water temperature, and 18 is an electric heater 3 based on a signal from the bath controller 17.
And a circulation pump 13 and the like. A hot water temperature detection thermistor 19 detects the temperature of the bath water flowing in from the bath water intake 7 and sends it to the controller 17. An outdoor unit 20 includes a compressor 21, an outdoor heat exchanger 22, a fan 23, and an expansion mechanism 24.
And is connected to the bath water heating device 2 by a refrigerant feed pipe 25 and a refrigerant return pipe 26.

In the above structure, the bath water inhaled from the inhalation port 5 is
It is led to the bath water heating device 2 through the return pipe 9. Then, it is guided to the filter tank 12 from the side of the filter tank 12 and
Hair etc. are removed when passing through 11 and filter tank 12
It is led from the lower part to the circulation pump 13 through a connection pipe.

The bath water discharged from the circulation pump 13 is sterilized by the sterilization tank 13
It is sterilized by and introduced into the filtration tank 16. The bath water introduced into the filtration tank 16 is heated by the bath heat exchanger 22, and the filtration stone 15
When passing through, dirt such as fat and organic matter is removed,
If necessary, it is further heated by the electric heater 3 and returned to the bath 1 through the bath water return port 8 and the jet port 6. In this way the bath water is always kept clean.

FIG. 2 is an external view of the bath controller 17. 27 is a thermometer that displays the set hot water temperature and the current hot water temperature. Settings button
28 and 29 can be set freely within the upper limit of 45 ℃ and the lower limit of 35 ℃. The example in FIG. 2 shows that the temperature is set to 40 ° C.

Reference numeral 30 denotes a current time meter. When changing this time, the current time change button 31 is pressed, and then the forward button 32 or the reverse button 33 is pressed to change the display of the time meter 30. When the desired display is achieved, the set button 34 is pressed to confirm the current time.

Reference numeral 35 is a bath time meter, which is composed of 24 LEDs 36, one of which corresponds to one hour. When changing this time, after pressing the bath time changing button 37, the forward button 32 or the backward button 33 is pressed to change the display of the bath time meter 35. When the desired display is reached, press the set button 34 to confirm the bathing time. The example in Fig. 2 shows that a bath reservation is made from 18:00 to 21:00.

FIG. 3 is a block diagram of the control device of the embodiment of the present invention.
Each element represents only a part necessary for implementing the present invention, and other elements are omitted. Reference numeral 38 denotes a signal input circuit, which is composed of hot water temperature setting means 39 for setting hot water temperature of bath water, bath time setting means 40 and thermistor 19.

Reference numeral 41 is a microcomputer, and a comparison calculation means 42,
It has a first timer 43, a second timer 44, a display means 45 and a drive determination means 46.

47 is an output circuit, which operates by receiving the output signal of the drive determination means 46, a heater drive means 48, a compressor drive means 49,
And a pump drive means 50, which are connected to the electric heater 3, the compressor 21, and the circulation pump 12, respectively.

Next, the operation of this embodiment configured as described above will be described with reference to FIG.

First, when the input time is set at the beginning (S1), it is determined whether the current time is t1 hours before the set bath time (S1).
2). At 1 hour before t, the heater ON permission that the electric heater may be operated is issued (S3), and the circulation pump is turned ON (S4). Next, at this point, it is determined whether the bathing time has come to an end (S5), and if so, if the circulation pump, the compressor, and the electric heater are on, all are turned off (S5).
6) and the end (S7). If the set bath time has not ended, the current hot water temperature Tw is detected and compared with the hot water temperature set value Ts (S8). If Tw <Ts, the compressor is turned on (S
9), heated by heat pump. Next, set the bath time t
It is determined whether it is two hours before (S10), the process returns to step S5 until t2 hours before, and the heating by the heat pump is continued until the relationship of Tw <Ts ends. If t2 hours before, it is determined whether or not there is heater ON permission (S11), and if there is permission, the electric heater is turned on (S12), heating is performed by the heat pump and the electric heater, and the process returns to step S5. If there is no permission, the process directly returns to step S5 to continue heating by the heat pump. Due to these heatings, the hot water temperature rises and Tw
<If it is not Ts (S5), the compressor and electric heater are turned on.
If yes, turn it off (S13) and cancel heater ON permission (S14)
Then, the process returns to step S5. By doing this, Tw
If <Ts is not satisfied, the heater is not turned on even at t2 hours, and if Tw <Ts is not satisfied by heating by turning on the electric heater, the electric heater is not turned on again. According to this embodiment, even in the winter when the heat pump capacity is lowered, the bath water is boiling at the bathing set time,
Comfortable bathing is possible, and in the summer, it is economical because it boils before the electric heater 3 turns on.

Next, a second embodiment of the present invention will be described with reference to FIGS. 4, 5, and 7.

Here, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Also in the second embodiment, FIG. 1 has the same structure.

FIG. 4 is an external view of the bath controller 17, and 51 is a manual heating button. FIG. 5 is a block diagram of the control device, and the heating setting means 52 is provided in the signal input circuit 38. In FIG. 7, the manual heating button is pressed at the beginning (S21) to be set (S22), and it is determined whether it is within the bathing set time (S23). If it is not within the bathing set time, turn on the circulation pump (S24), detect the hot water temperature Tw, and set the hot water temperature set value Ts.
Compare with (S25). If Tw <Ts, turn on the compressor and electric heater (S26), and heat with the heat pump and electric heater. When the hot water temperature rises and Tw <Ts is not satisfied, the compressor and the electric heater are turned off (S27), and the process ends (S28).

If it is within the bathing set time in step (S23), the electric heater is turned on (S29), and the process proceeds to step S7 in FIG.
After that, the operation is the same as that of the first embodiment. That is,
Even in the case of heating only by the heat pump in the first embodiment, the electric heater is forcibly turned on so that the heat pump and the electric heater perform heating.

Further, within the bathing set time, even if the compressor 21 is on and the electric heater 3 is off, the electric heater 3 is forcibly turned on.

As described above, according to the present embodiment, when suddenly wanting to take a bath, the bath water can be boiled rapidly, and the water temperature can be lowered by pouring water during the bath, so that it is possible to warm it quickly. It can be dealt with.

As described above, the present invention outputs the bath water temperature detecting means, the bath water temperature setting means, the bathing time setting means, and the first predetermined time before the time set by the bathing time setting means. The heater driving means compares the output of the first timer means with the output of the second timer means set shorter than the first timer which outputs the second predetermined time before the time set by the bath time setting means. Further, by providing the control device having the comparison operation means for outputting the drive signal to the compressor drive means to the drive determination means, it is possible to realize a comfortable and economical heat pump type bath water heating device throughout the year.

Further, the present invention, by adding a heating setting means,
It is for the convenience of users.

[Brief description of drawings]

1 is an overall configuration diagram according to an embodiment of the present invention, FIG. 2 is an external view of a bath controller of the first embodiment, FIG. 3 is a configuration diagram of a control device of the first embodiment, and FIG. FIG. 4 is an external view of the bath controller of the second embodiment, FIG. 5 is a configuration diagram of the control device of the second embodiment, and FIG. 6 is a flowchart of control operation of the first embodiment. FIG. 7 is a flow chart of the control operation of the second embodiment. 1 ... tub, 2 ... bath water heating device, 3 ... electric heater,
4 ... Bath heat exchanger, 12 ... Circulation pump, 17 ... Bath controller, 19 ... Hot water temperature detection thermistor, 20 ... Outdoor unit, 21 ... Compressor, 22 ... Outdoor heat exchanger, 39 ... … Hot water temperature setting means, 40 …… Bathing time setting means, 41 …… Microcomputer, 48 …… Heater driving means, 49 …… Compressor driving means, 52 …… Heating setting means

Claims (2)

[Claims] 1. A bath heat exchanger for exchanging heat with bath water, a heating unit for heating the bath water, a heating unit provided with a circulation pump, a compressor, an outdoor heat exchanger, and an expansion mechanism. The outdoor unit provided is connected by a refrigerant pipe, and the bath water temperature detecting means, the bath water temperature setting means, the bathing time setting means, and the first predetermined time before the time set by the bathing time setting means are output. The first timer means and the output of the second timer means, which is set shorter than the first timer for outputting the second predetermined time before the time set by the bathing time setting means, are input, When the timer means is input, when the hot water temperature is lower than the set value, it is heated by the heat pump, and when the second timer means is input, when the hot water temperature is lower than the set value, it is heated by the heat pump and the electric heater. Like Motor drive means and heat pump bath water heating device a control device is provided with a comparison operation means for outputting to the drive judging means for outputting a drive signal to the compressor driving means. 2. The heat pump type bath water heating device according to claim 1, wherein the control device is provided with heating setting means for starting heating with a heat pump and an electric heater regardless of whether or not the bathing time is set.