JPH0236048Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a bathtub device equipped with a heat pump type heating device, specifically, a heat pump type heating device having a bathtub and a condenser for heating bath water in the bathtub. The present invention relates to a bathtub device equipped with.

(Prior Art) This type of bathtub device is also described in Japanese Utility Model Application Publication No. 58-89730 and is already known.

Generally, in this type of bathtub device, the control width of the water temperature is set to be small so as not to cause discomfort to bathers. For example, the change in the water temperature,
We try to keep the set water temperature (for example, 42°C) within 0.5°C (control range).

Then, regardless of whether the user is taking a bath or not, the water temperature is controlled within the control range that is set to be small.

(Problem that the invention attempts to solve) However, when the control range of the hot water temperature is made smaller,
While the comfort during bathing has increased, the frequency of turning on and stopping the heat pump type heating device has increased, which has led to the problem that the durability of the device has decreased accordingly, and power loss has also increased due to turning on and stopping.

Therefore, the purpose of the present invention is to set the control range during bathing to a small value as in the conventional method, and to detect when not bathing, so that the time interval between starting and stopping the heating device during non-bathing is longer than that during bathing. The object of the present invention is to actively increase the length of the heat pump to reduce the frequency of turning on and off of the heat pump type heating device as a whole while maintaining comfort during bathing.

(Means for Solving the Problems) The configuration of the present invention will be explained based on FIGS. 1 to 5. A heat pump includes a bathtub 1 and a condenser 3 for heating bath water in the bathtub 1. a detection means 8 for detecting the temperature of the bath water; a regulation means for regulating the start/stop time interval of the heating device during bathing; and a detection means 8 for detecting the temperature of the bath water; A bathtub device comprising: a starting/stopping means for starting/stopping the heating device, a changing means for making the starting/stopping time interval of the heating device longer than the starting/stopping time interval based on the regulating means; and outputting a bathing/non-bathing signal. A bathing/non-bathing signal output means for outputting a bathing/non-bathing signal, and a command means for instructing the changing means to turn on when not bathing based on the output of the bathing/non-bathing signal output means.

As shown in FIGS. 1 and 2, the regulating means is constituted by a first setting resistor R1 provided in the positive feedback circuit 13 of the comparator 10, and the changing means is connected in parallel with the first setting resistor R1. Alternatively, as shown in FIGS. 4 and 5, the regulating means may be constructed in the same manner as shown in FIG. It may be constructed from a timer circuit 40 that delays the operation of the start/stop means based on the means for a certain period of time.

Further, the bathing/non-bathing signal output means includes a pressure switch PS that detects bathing based on a change in water pressure in the bathtub, a relay X ₁ energized by the output of the switch PS, and its normally closed contact X ₁ -1. Alternatively, the bathing/non-bathing signal output means may be composed of a manual switch S, a relay _X1 energized by the ON operation of the switch S, and its normally open contact. It may also be composed of X ₁ -2 (see Figure 5). Moreover, this bathing/non-bathing signal output means may detect and output bathing using a light sensor or a sound sensor.

(Function) Based on the output of the bathing/non-bathing signal output means,
Since the command means turns on the changing means when not taking a bath, the time interval between starting and stopping of the heat pump type heating device becomes longer than the time interval when bathing according to the regulating means, and therefore The frequency of starting and stopping will also be reduced. As a result, comfort during bathing is not impaired as in the past, and the frequency of turning on and stopping the heating device is reduced overall.

(Example) In the example shown in FIG. 3, a hot water storage tank 2 is connected to a bathtub 1, a heat pump type heating device for reheating is provided, and a condenser 3 of this heating device is arranged in the hot water storage tank 2. It's a thing.

The heat pump type heating device is a normal one,
Compressor 4, condenser 3, expansion valve 5 and evaporator 6
are connected in sequence.

In addition, P in the figure indicates that the bathtub water is connected to the bathtub 1 and the hot water storage tank 2.
This is a pump for circulating between.

Moreover, what is shown in FIG. 2 is mainly the drive circuit 7 of the heating device, and to briefly explain it, the power supply line
Between L ₁ and L ₂ is a drive motor for the compressor 4 (hereinafter referred to as
A MC (referred to as a compressor motor) is connected, and an operation switch SW is interposed on one of the power supply lines _L1 ,
and an auxiliary relay MS for controlling energization to the pump P and the motor MC to the other power supply line _L2 .
A normally open contact X 2 -1 connected in series to this parallel circuit and a normally open contact X ₂ -1 are provided. The normally open contact X ₂ -1 is a normally open contact of a relay X ₂ for commanding start/stop of the compressor motor MC, which is provided in a command circuit 9 for commanding start/stop, which will be described later.

Also, what is shown in FIG. 1 is the start/stop command circuit 9 that controls the energization of the drive circuit 7 based on the output of the detection means 8 that detects the temperature of the bath water, and mainly controls the comparator 10. It consists of the Schmitt trigger circuit 11 used. This will be explained below.

The detection means 8 consists of a thermistor,
This detection means 8 and a variable resistor Vr for setting the set temperature of the water temperature are connected in series, and this connection point is connected to the inverting input terminal 10a of the comparator 10, and the non-inverting input terminal 10b of the comparator 10. is connected to a setting circuit 12 which is composed of first and second resistors r1 and r2 and sets a reference voltage, and is further connected to the output terminal 1 of the comparator 10.
A positive feedback circuit 13 is connected between 0c and the non-inverting input terminal 10b.

Thus, by setting the resistance value of the positive feedback circuit 13 according to the desired control width of the hot water temperature, the lower limit temperature and upper limit temperature of the hot water temperature to be controlled in relation to the variable resistor Vr can be set. It can be set.

Further, the base of a transistor switch 14 is connected to the output terminal 10c, and the base of the transistor switch 14 is connected to the output terminal 10c.
The compressor motor of the drive circuit 7 is connected to the collector of the drive circuit 7.
The above-mentioned command relay X ₂ , which commands the start and stop of the MC, is connected.

In the above configuration, the drive circuit 7 and the start/stop command circuit 9 constitute a start/stop means for controlling the start/stop of the heat pump type heating device.

In the bathtub device configured as described above, a pressure switch PS is installed at the bottom of the bathtub 1.
A series circuit of the pressure switch PS and the transmitting relay X ₁ is provided in the drive circuit 7, and when taking a bath, the switch Close the PS,
This excites the transmitting relay _X1 and outputs the bathing signal.

Further, the positive return circuit 13 of the command circuit 9
is formed from a parallel circuit of a first setting resistor R ₁ and a series circuit of a second setting resistor R ₂ and a normally closed contact X ₁ -1, and the normally closed contact X ₁ -1 is opened during bathing. The control range during bathing is set by the first setting resistor R ₁ , while the normally closed contact X ₁ is set during non-bathing.
-1 is closed to reduce the return resistance, so that the control width can be changed to be larger than that during bathing.

Here, the first setting resistor R ₁ in the positive feedback circuit 13 is the regulating means of the present invention, and the second setting resistor R ₂ and the normally closed contact
The series circuit with X ₁ -1 corresponds to the changing means. Further, the pressure switch PS and the transmission relay _X1 constitute bathing/non-bathing signal output means, respectively.

The operation of the bathtub device will be explained below.

The operation switch SW of the drive circuit 7 is turned on in advance.

First, the case of bathing will be explained.

When taking a bath, the pressure switch PS is closed, so the transmission relay X ₁ is energized, and the normally closed contact X ₁ -1 provided in the positive feedback circuit 13 of the start/stop command circuit 9 is opened. That's what I do. As a result, the resistance of the positive feedback circuit 13 becomes the first setting resistance.
Only _R1 is available, and as described above, the control range is set to a small value corresponding to bathing.

That is, the temperature difference between the lower limit temperature at which the comparator 10 outputs an H signal and the upper limit temperature at which it outputs an L signal is set small.

Thus, when the water temperature becomes lower than the lower limit temperature, the comparator 10 outputs an H signal to turn on the transistor switch 14 and energize the command relay _X2 .

As a result, the normally open contact X ₂ -1 of the command relay X ₂ provided in the drive circuit 7 is closed to drive the pump P and the auxiliary relay MS
is energized, and the normally open contact MS− of the relay MS is energized.
1 and 2 are closed, and the compressor motor MC starts operating.

When the water temperature reaches the upper limit temperature, the output of the comparator 10 becomes an L signal, the switch 14 is turned off, and the compressor 4 is stopped, operating in the opposite manner to the above case. .

On the other hand, when the bather is not taking a bath, the pressure switch PS is open, so the transmitting relay _X1 is demagnetized. Therefore, the normally closed contact X ₁ -1 provided in the command circuit 9 is closed, and the feedback circuit 13
becomes a parallel circuit of the first and second setting resistors R ₁ and R ₂ ,
The resistance is set smaller than that during bathing. Therefore, the control width is set larger than that during bathing, as described above.

As a result, the lower limit temperature at which the comparator 10 outputs an H signal becomes lower than when taking a bath;
Moreover, since the upper limit temperature for outputting the L signal becomes higher, the frequency of turning on and stopping the compressor motor MC decreases compared to when bathing.

(Other Embodiments) The control circuits shown in FIGS. 4 and 5 are also other control circuits that can be applied to the bathtub device shown in FIG. 3. This embodiment also has the same basic configuration as the previous embodiment, and FIG.
It includes circuits 71 and 91 similar to the drive circuit 7 and command circuit 9 shown in FIG. Hereinafter, the differences from those in FIGS. 1 and 2 will be explained.

In the embodiment described above, the control width was changed by changing the resistance value of the positive feedback circuit 13 of the command circuit 9, but in this embodiment, the positive feedback circuit 13 was changed to only the first contact resistance _R1. Consisting of
The resistance value of the circuit 13 is kept constant, and the lower and upper limits of temperature at which the comparator 10 outputs an H signal and an L signal are the same during bathing and when not bathing.
As shown in the figure, the drive circuit 71 includes the timer circuit 4.
0, and by delaying the start of driving of the compressor motor MC for a predetermined period of time after the comparator 10 outputs the H signal when not bathing, as a result, the heating device starts and stops when not bathing. This allows the time interval to be longer than that for bathing.

The timer circuit 40 includes a timer T, a normally open contact X ₂ -2 of a command relay X ₂ provided in the start/stop command circuit 91, and a normally closed contact MS-2 of the auxiliary relay MS.
and a series circuit with the auxiliary relay.
Connected in series with MS.

Further, as a bathing/non-bathing signal output means, a push-button manual switch S and a transmission relay _X1 are provided on the power line _L2 of the drive circuit 71;
The normally open contact _X1-2 of the transmitting relay _X1 is connected in series with the auxiliary relay MS and in parallel with the time-limited operation a contact T-1.

When taking a bath, the switch S is closed by the person taking the bath.

Below, we will briefly explain how to drive while taking a bath.

When taking a bath, the manual switch S is closed and the transmitting relay _X1 is energized. Therefore, the normally open contact X ₁ -2 of the transmitting relay X ₁ is maintained in the closed state.

In this state, when the water temperature falls below the lower limit temperature, the command relay _X2 is energized and its normally open contacts _X2-1 and _X2-2 are both closed.

Since the normally open contact X ₁ -2 is closed, the closing of the contact X ₂ -1 causes the auxiliary relay MS to close.
is excited, its normally open contacts MS-1 and MS-2 are closed, and the compressor motor MC is driven.

On the other hand, the timer T has the normally open contacts X ₁ -
2 is closed, it has nothing to do with starting or stopping the motor MC, and the normally open contact
Even if X ₂ -2 is closed, at the same time the auxiliary relay MS is energized and its normally closed contact MS-3 is opened, so the timer T does not work during this bathing time.

I will explain about the time when I am not taking a bath.

Open the manual switch S. Therefore, the transmitting relay _X1 is demagnetized and the normally open contact _X1-
2 is held open.

Thus, when the water temperature falls below the lower limit temperature in this state, the command relay _X2 is energized and the normally open contacts _X2-1 and _X2-2 are closed.

This time, since the normally open contact X ₁ -2 is open, the auxiliary relay MS is not immediately energized.

On the other hand, since the normally closed contact MS-3 maintains a closed _circuit , the timer T is energized by the closing of the normally open contact
1 closes after a predetermined time.

Thus, after this predetermined time the auxiliary relay
When MS is excited and its normally open contacts MS-1 and MS-2 are closed, the compressor motor MC is driven.

Furthermore, by energizing the auxiliary relay MS, the self-holding relay MS-4 is closed, and at the same time, the normally closed contact MS-3 is opened and the timer T is reset.

(Description of other embodiments) In addition, a variable capacity type compressor having a capacity control means is used as the compressor provided in the heating device, and the compressor is of a variable capacity type having a capacity control means, so that the compressor is fully compressed during bathing based on the signal from the bathing/non-bathing signal output means. Capacity operation may be performed, and partial capacity operation may be performed when not bathing. In this case, the capacity control means corresponds to the changing means in the present invention.

In the above embodiments, the bathing/non-bathing signal output means, especially the output detection means in the first embodiment, is not limited to the pressure switch PS, etc., but may also be a sensor for detecting water level, a light sensor, or a sound sensor. Sensors can also be used.

(Effects of the Invention) As described above, the present invention includes: a changing means for making the on-off time interval of the heating device longer than the on-off time interval based on the regulating means; and a bathing device that outputs a bathing/non-bathing signal. Since the non-bathing signal output means and the command means for instructing the changing means to turn on when not bathing based on the output of the bathing/non-bathing signal output means are provided, the control width of the water temperature during bathing can be changed from the conventional one. Even if it is set to a small value in the same way, the time interval between turning on and stopping the heating device when not bathing can be made longer than before, so the frequency of turning on and off of the heating device can be reduced as a whole, and as a result, Not only can the durability of the device be improved, but also the power loss caused by starting and stopping can be suppressed.

[Brief explanation of the drawing]

Figures 1 to 3 are explanatory diagrams of one embodiment of the present invention, Figures 1 and 2 are control circuit diagrams of a heat pump type heating device, Figure 3 is an overall explanatory diagram, and Figures 4 and 5 are other diagrams. It is a control circuit diagram of the heat pump type heating device of the Example. 1... Bathtub, 3... Condenser, 7... Drive circuit,
9... Start/stop command circuit, 10... Comparator, 1
1... Schmitt trigger circuit, 13... Positive feedback circuit, R ₁ ... First setting resistor, R ₂ ... Second setting resistor, X ₁ ... Relay for transmission.

Claims (1)

[Claims for Utility Model Registration] A bathtub 1, a heat pump type heating device having a condenser 3 for heating the bathtub water in the bathtub 1, a detection means 8 for detecting the temperature of the bathtub water, and the heating device. , a bathtub device comprising a regulating means for regulating the start/stop time interval during bathing, and a start/stop means for starting/stopping the heating device based on the output of the detecting means 8, comprising: a starting/stopping time interval for the heating device; a changing means for making the start/stop time interval longer than the start/stop time interval based on the prescribing means; a bathing/non-bathing signal outputting means for outputting a bathing/non-bathing signal; and based on the output of the bathing/non-bathing signal output means. 1. A bathtub device equipped with a heat pump type heating device, characterized in that a command means is provided for instructing the changing means to turn on operation when the user is not taking a bath.