JPH04195309A - Hot water temperature controller - Google Patents

Abstract

PURPOSE:To obtain hot water temperature which satisfies desired temperature variation even when heat conduction is caused between hot water and a piping system by determining a driving quantity by multiplying a driving quantity which is inputted from a storage means by a coefficient corresponding to a switching period. CONSTITUTION:When a current is supplied from a hot water temperature control means 18 to a coil 26, a plunger 25 applies a bias force to a valve shaft 8. The current supplied to the coil 26 is varied to move the balance point of an automatic pressure control valve 3. The hot water temperature control means 18 inputs the signal of a hot water temperature detecting means 15 and the signal of a setting means 17 and then varies the current supplied to the coil 26 to control a mixing valve 23 so that the temperature of the hot water reaches set temperature. The mixed water after the temperature control passes through a mixing part 19 and a hot water temperature detecting means 15 detects the temperature of the hot water. When the temperature of the hot water is varied at a high speed, desired high-temperature-side hot water temperature is set by the setting means 17.

Description

[Detailed description of the invention] Industrial application field The present invention adjusts the temperature of hot water! The present invention relates to a hot water temperature control device that obtains a consistent hot water temperature and supplies hot water with varying temperatures.

2. Description of the Related Art Conventionally, there has been a hot water temperature control device of this type as shown in FIG. (For example, Japanese Unexamined Patent Publication No. 1-312279) In FIG. 4, 1 is a vortex flow path, 2 is a water flow path, and an automatic pressure regulating valve 3 is provided in association with each flow path. The automatic pressure regulating valve 3 includes a hot water side valve element 4 that reduces the primary pressure PH1 of the vortex flow path 1, a hot water side valve seat 5, a water side valve element 6 that reduces the primary pressure PCI of the water flow path 2, and a water side valve. seat 7, hot water side valve body 4, and water side valve body 6
and the primary pressure PHI after depressurizing the hot water and water.
, and a piston 9 that operates based on the pressure difference between PCI. Even if the pressure of hot water or water suddenly changes, the automatic pressure regulating valve 3 moves with that pressure, and the secondary pressures PH2 and P of hot water and water
It acts so that C2 is always kept equal.

Furthermore, a bias means 10 is provided on the valve shaft 8, and the bias means 10 is provided to sandwich a bobbin 11 connected to the end of the valve shaft 8, a coil 12 wound on the bobbin 11 and insulated, and the coil 12. The coil 12 is connected to a control means 18 via a flexible part 14.

When a current is passed through the coil 12 from the control means 18, the current crosses the magnetic field generated by the permanent magnet 13, so that a piascus is applied to the valve stem 8 according to Fleming's law. For this reason, the automatic pressure adjustment point shifts by the amount of pie scan,
For example, the secondary pressures PH2 and PC2 of hot water and water are always regulated at a ratio of 2:1, and as a result, the temperature of the hot water becomes high. By changing the current to the coil 12 in this way, the mixed water temperature is changed.

19 is a mixing section for hot water and water, and after mixing the hot water and water, the hot water is discharged via a flow rate regulating on-off valve 20, and its temperature is determined by a hot water temperature detection means (for example, a thermistor) 15, and its flow rate is determined by a flow rate. Detected by the detection means 16 and set by the setting means 17
The control means 18 causes the bias means 10 to match the value of
and energizes the flow rate adjustment valve driving means 21 to adjust the temperature.

When discharging hot water with varying mixed water temperature using this hot water mixing device, a set hot water temperature is set by the setting means 17 and this set temperature is changed over time.

The control means 18 changes the mixing temperature by adjusting the current to the coil 12 and varying the automatic pressure regulating valve 3 so that the temperature deviation between the mixed water temperature detected by the hot water temperature detection means 15 and the set temperature becomes zero. Since the set temperature changes over time, the control means 18 constantly varies the automatic pressure regulating valve 3 so as to make the temperature deviation zero, and as a result, the hot water temperature changes over time.

Problems to be Solved by the Invention However, with the above configuration, when the mixed water temperature is repeatedly changed at high speed, the amount of temperature change (coil current) is constant regardless of the period of change (in Figure 5, the high temperature is P
, low temperature is Q), even if desired temperatures P and Q are obtained at the position of the hot water temperature detection means, heat builds up between the mixed hot water and the piping system as it flows downstream of the flow rate control valve. Due to the exchange of water, the actual temperature of the mixed water may become dull.

The present invention is intended to solve such conventional problems, and aims to obtain a desired temperature change regardless of the hot water temperature change period by changing the amount of hot water temperature change in accordance with the hot water temperature change period.

Means for Solving the Problems In order to solve the above problems, the hot water temperature control device of the present invention includes a hot water supply means, a hot water temperature control means for controlling the temperature of the hot water supply means, and a hot water temperature control means for detecting the hot water temperature. The temperature control means includes a plurality of storage means for storing the temperature signal of the hot water temperature detection means and the drive amount to the hot water supply means as a pair, and a plurality of storage means for storing the drive amount stored in the storage means over time. The driving amount setting means determines the driving amount by multiplying the driving amount inputted from the storage means by a coefficient corresponding to the switching period of the switching means.

Effect With the above-described configuration, the amount of drive to the hot water supply means also changes according to the cycle of hot water temperature change.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Note that FIG. 1 is a cross-sectional view of the hot water supply control device, and the same parts as in FIG. 4 are designated by the same reference numerals and detailed explanations are omitted. 2
Reference numeral 2 denotes an urging means, and the automatic pressure regulating valve 3 and the urging means 22 form a mixing valve 23. Reference numeral 24 denotes a mixing valve driving means that opposes the force of the urging means 22 and applies a variable bias. The mixing valve driving means 24 includes a plunger 25 made of a magnetic material, and a waterproof and insulated a
It has m coils 26, and the coils 26 are connected to the hot water temperature control means 1.
8 is connected.

The hot water temperature is detected by a hot water temperature detection means 15. The flow rate is detected by flow rate detection means 16. The flow rate l1 node on-off valve 20 is adjusted by a signal from the hot water temperature control means 18 via a flow rate adjustment on-off valve driving means 21.

FIG. 2 shows an example of the hot water temperature control means 18.

The signals from the hot water temperature detection means I5 and the setting means 17 are input to the mixed hot water temperature control means 27 to calculate a control amount. The calculation result is sent to the driving amount setting means 28, and the i-magnetic coil 26 (also referred to as mixing valve driving means) is operated with the driving amount set here. Furthermore, the mixed water temperature detected by the hot water temperature detection means 15 and the drive amount set by the drive amount setting means 28 at that time are stored in the first storage means 29 to the second storage means 30 for each mixed water layer.

31 is the first storage means 29 and the second storage means 3;
32 is a timer means, and 633 is an alternating current signal generating means that generates a minute alternating current signal to be superimposed on the drive amount.

Next, the operation of the configuration of the present invention will be explained.

When a current is passed through the coil 26 from the hot water temperature control means 18, the plunger 25 made of a magnetic material applies a piascus to the valve stem 8 according to Fleming's law. The automatic pressure regulating valve 3 is balanced when the biasing forces of the bias force and the biasing means 22 are balanced.

Therefore, by changing the current flowing through the coil 2G, the balance point of the automatic pressure regulating valve 3 can be moved.

For example, when the current is small, the force of the biasing means 22 is stronger, so the water side valve body 6 opens more than the hot water side valve body 4, and the hot water outlet temperature becomes lower. When the current is increased, the pusher 25 is pushed out against the force of the urging means 22, and the hot water side valve body 4 begins to open, resulting in an increase in the temperature of the tapped water.

In this way, the hot water temperature control means 1B
By inputting this signal and the signal from the setting means 17, the current flowing through the coil 26 is varied and the mixing valve 23 is adjusted so that the temperature of the tapped water becomes the set temperature. temperature! The 11-section mixed hot water passes through a mixing section 19, and the hot water temperature is detected by a hot water temperature detection means 15.

When changing the hot water temperature at high speed, the setting means 17 sets the desired hot water temperature. The hot water temperature control means 18 changes the coil current slowly at first in response to the input from the setting means 7 so that the mixed hot water temperature reaches the set temperature. Hot water temperature detection means 1 at the point when the set temperature and the hot water outlet temperature become equal and stable
5 and the drive amount of the drive amount setting means 28 are stored in the first storage means 29. Similarly, the setting means 17 sets the water temperature on the low temperature side. The hot water temperature control means 18 changes the coil current so that the mixed hot water temperature slowly reaches the set temperature in response to the input from the setting means 17.The hot water temperature detecting means 15 changes the coil current so that the mixed hot water temperature becomes equal to the hot water temperature and becomes stable. The temperature signal and the drive amount of the drive amount setting means 28 are stored in the second storage means 30.
to be memorized.

By storing the degree of water in this way, the driving amount can be adjusted by the signal from the storage means instead of the signal from the hot water temperature detecting means 15, and the temperature of the mixed hot water can be rapidly changed to dispense hot water.

At this time, the mixed water temperature is changed by switching the driving amount stored in the storage means, but the operation of the switching means 31 is performed by a signal from the timer means 32, or by using the setting means 17 etc. from the outside. It is also possible to switch.

However, when the hot water temperature is repeatedly changed at high speed, if the amount of change in the hot water temperature is constant regardless of the period of change, even if the desired temperature is obtained at the position of the hot water temperature detection means 15, the flow rate control valve 20 As the hot water flows downstream, heat exchange occurs between the hot water and the piping system, so the actual temperature of the hot water may become dull.

Means for preventing the above phenomenon will be explained below.

When the mixing hot water temperature control means 27 receives a request signal for high-speed repeated hot water temperature change from the setting means 17, it transmits it to the switching means 31 and the timer means 32. As mentioned above, the driving amount to obtain the desired hot water is stored in the first storage means 29, and the driving amount to obtain the desired low temperature water is stored in the second storage means 30. The repetition period is set in advance in the timer means 32 or is set in the timer means 32 from the outside by the setting means 17 via the mixed hot water temperature control means 27.

The timer means 32 sends a signal to the switching means 31 at a set repetition period. The switching means 31 switches the output signals of the first storage means 29 and the second storage means 30 based on the signal from the timer means 32 and sends the drive amount to the drive amount setting means 28 .

When the drive amount setting means 28 receives the signal from the switching means 31, it changes the drive amount according to the switching cycle.

For example, this will be explained using FIG. It is assumed that the drive amount stored in the first storage means 29 is P, and the drive amount stored in the second storage means 30 is Q. When changing the mixed water temperature slowly, the cycle is long, so the drive amount can be approximately P and Q.
When using the drive amount stored in the storage means 29, the drive amount setting means 28 sets the drive amount by multiplying P by a positive coefficient corresponding to the switching cycle.
When using the drive amount stored as 0, the drive amount setting means 28 sets the drive amount by multiplying Q by a negative coefficient corresponding to the switching period. The mixing valve driving means 26 is driven by the set driving amount to change the water temperature.

In this way, as the switching cycle becomes faster, the difference in the switched hot water temperature increases, so even if heat is exchanged between the hot water and the piping system, the actually obtained hot water temperature can satisfy the desired temperature change.

Also, disturbances (pressure fluctuations, vortex flow path 1 or water flow path 2) may occur during tapping.
When the coil 26 is driven by the drive amount of the storage means, the temperature of the mixed hot water may deviate from the temperature stored in the storage means. At this time, there is a detection delay, but this phenomenon can be detected by the hot water temperature detecting means 15, and safe hot water dispensing can be performed by stopping the hot water dispensing or re-memorizing the information in the memory means.

In the above embodiment, the mixing valve 23 corresponds to the hot water supply means. Further, in the above embodiment, a temperature control method for a hot water mixing device has been described, but this control method can also be used for temperature control of an instantaneous hot water heater or the like.

Effects of the Invention As described above, the hot water temperature control device of the present invention includes a hot water supply means, a hot water temperature control means for controlling the temperature of the hot water supply means,
The temperature control means includes a plurality of storage means for storing the temperature signal of the hot water temperature detection means and the driving amount to the hot water supply means as a pair, and a storage of the storage means. and a drive amount setting means for determining the drive amount by multiplying the drive amount input from the storage means by a coefficient corresponding to the switching period of the switching means. In order to repeatedly change the hot water temperature at a high speed, the difference in the hot water temperature that changes becomes larger as the switching cycle becomes faster, so even if heat is exchanged between the hot water and the piping system, the actual hot water temperature obtained will be slower. It is possible to meet the desired temperature change without any problems.

Therefore, when used for Java, etc., you can clearly experience the repetition of cold and hot water, and enjoy comfortable fluctuations in hot water temperature.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a hot water temperature control device according to an embodiment of the present invention;
Figure 2 is a control block diagram of the hot water temperature control device, Figure 3 is an output characteristic diagram of the control means, Figure 4 is a sectional view of the conventional hot water temperature control device, and Figure 5 is the conventional hot water temperature control. FIG. 3 is a diagram showing the output characteristics of the device. 1...Hot water flow path, 2...Water flow path, 15.
... Hot water temperature detection means, 18... Hot water temperature control means. Name of agent: Patent attorney Akira Okaji and 2 others -・
-+t@ 2- 1lIIF! Figure 4 Figure 5 Short term

Claims (1)

[Scope of Claims] Consisting of a hot water supply means, a hot water temperature control means for controlling the temperature of the hot water supply means, and a hot water temperature detection means for detecting the temperature of the hot water, the temperature control means is configured to control the temperature of the hot water temperature detection means. a plurality of storage means for storing a temperature signal and the drive amount to the hot water supply means as a pair; a switching means for temporally switching the drive amount stored in the storage means; A hot water temperature control device having a driving amount setting means that determines the driving amount by multiplying the driving amount by a coefficient corresponding to the switching period of the switching means.