JPH0330793B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a bathtub, particularly a one-pipe, two-channel hot water supply system having a water chamber that is directly heated and a corrugated pipe that is housed in the water chamber and that is indirectly heated. This invention relates to a temperature control device used in a functional bathtub.

Prior Art A burner 11, a water chamber 12 directly heated by the burner 11, and a flexible pipe 13 housed in the water chamber 12 and indirectly heated by the water in the water chamber 12 (FIG. 3), The water chamber 12 includes a water supply pipe 12a and a hot water supply pipe 12.
In addition to being able to provide general hot water by connecting to b.
The flexible pipe 13 is a circulation path 1 including a circulation pump 14a.
4 and 14 to connect to the bathtub B, and the hot water supply pipe 12b
It has a so-called one-can, two-channel type hot water supply function that allows you to fill the bathtub B with hot water by opening the hot water supply valve 12c installed in the bathtub, and also to refill the bathroom by operating the upper circulation pump 14a with the burner 11 ignited. Bath pot 1
0 is widespread. This device can use inexpensive heavy oil or kerosene as the burner 11, has a simple overall structure, and is equipped with a circulation pump 14a and circulation paths 14, 14, so that the bathtub 10 and bathtub B are separated. It has features such as being able to perform reheating operations even when the engine is in use.

As a temperature control device attached to the bath pot 10, a hot water temperature detector is attached to the hot water supply pipe 12b, and an error is calculated by calculating the difference between the set value of a separately provided hot water temperature setting device and the hot water temperature. In addition to this, a bath temperature detector and a bath temperature setting device are added, and the difference in output between the two is taken to control the circulation pump 1.
4a is known, which performs on/off control and is provided with a temperature control function during reheating.

However, in such conventional temperature control devices, the hot water temperature setting device is commonly used to set different hot water temperatures for both general hot water supply and when filling bathtub B with hot water. It is necessary to reset the set value to a predetermined value each time you start filling hot water, and even if an on/off control function for the circulation pump 14a is provided, the temperature in the water chamber 12 must be maximized during refilling, otherwise the temperature in the serpentine pipe 13 will be affected. Heating efficiency will decrease, so you will have to reset the hot water temperature setting device to the maximum value each time you reheat.Furthermore, if you leave the hot water temperature setting device at the maximum value, it will become too hot during subsequent general hot water heating. There were problems such as the hot water being released at a certain temperature, which was dangerous, and it was extremely difficult to use.

Therefore, there is a known system in which the hot water temperature setting device is automatically set to the highest value during reheating, and then returns to the predetermined hot water temperature set value when reheating is completed (in practice). Publication No. 58-16838). However, even though this bath pot 10 does not include a water chamber 12 and is effective for a type that uses a hot water supply heat exchanger and a reheating heat exchanger together, it has a water chamber 12. It is inappropriate for formats. Even if the hot water temperature setting device is returned to the predetermined hot water temperature set value after reheating, the water chamber 12 still holds a large amount of hot water that has been heated to the maximum temperature for reheating, and cannot be used for general hot water supply after that. This is because if this high-temperature water is released during this period, it could lead to an extremely dangerous situation.

Purpose of the Invention In view of the actual state of the prior art, an object of the present invention is to provide a temperature control device with two systems, a bath temperature control system and a hot water supply temperature control system, so that only the latter operates during general hot water supply, while In the tension mode and the reheating mode, by configuring the former to perform cascade control over the latter, the reheating operation can be performed for a bath pot with a water chamber without resetting the hot water temperature setting device. Temperature control in a new one-can, two-channel type bath pot that can be performed with high efficiency, poses no danger to the user, and can also be used to supply regular hot water at an appropriate temperature and fill the bath. The goal is to provide equipment.

Structure of the Invention The structure of the present invention to achieve the above object includes a bath temperature setting device, a hot water temperature setting device, and a burner control device, and in a manual mode for general hot water supply, the hot water temperature setting device is manually set. While the burner blinking control is performed based on the error signal between the hot water temperature set value and the hot water temperature, in the hot water filling mode and reheating mode, the bath temperature set value manually set on the bath temperature setting device and the actual water temperature are controlled. A bath temperature control system for cascade control of a hot water temperature control system consisting of a hot water temperature setting device, a burner control device, and a hot water temperature setting device by controlling the hot water temperature setting device using an error signal with respect to the bath temperature. configure,
While only the manually set hot water temperature set value is valid during general hot water supply, a separately manually set bath temperature set value is valid when filling and refilling hot water to achieve and maintain a predetermined bath temperature. The gist is that the hot water supply temperature setting value can be controlled in this manner.

Note that the hot water supply temperature setting value from the hot water supply temperature setting device is a target value of a burner control device that controls the hot water supply temperature. Further, the hot water supply temperature set value is regulated by an error signal between the bath temperature set value and the bath temperature in the hot water filling mode and the refilling mode. Therefore, in the hot water filling mode, by operating the burner control device so that this error signal disappears,
Hot water can be filled to achieve a predetermined bath temperature that corresponds to the bath temperature set value. On the other hand, in the reheating mode, for example, the hot water temperature setting value is forcibly set to the maximum value at the beginning of the operation, and as the error signal becomes smaller as reheating progresses, it is set to a constant value close to the bath temperature set value. By continuously lowering the bath temperature to a temperature of It can be set to a predetermined temperature. Therefore, it is possible to effectively prevent the possibility that dangerously high-temperature hot water will be supplied during subsequent general hot water supply.

Example Examples will be described below with reference to the drawings.

The temperature control device of the one-can, two-channel bath pot 10 includes a hot water temperature setting device 20, a comparator 25, and a burner control device 2.
6 and the hot water temperature detector 12d, the bath pot 10
In addition to configuring a hot water temperature control system for
The bath pot temperature setting device 31, the bath pot temperature detector 32, and the comparator 33 constitute a bath temperature control system with the hot water temperature setting device 20 as the operating end (first
figure). Here, in the manual mode for general hot water supply, the latter does not operate, but in the hot water filling mode and refilling mode for filling and refilling bathtub B, the latter forms a measure loop for the former, It operates to control the former in cascade.

The bath pot 10 has a burner 11, a water chamber 12, and a snake pipe 1.
3, and the mechanical structure of each of these components and their mutual mechanical structure is exactly the same as the general one shown in FIG. 3, so the reference numerals of each component in FIG. It corresponds to that of . However, as shown in Figure 3, a hot water temperature detector 12d is attached to the hot water supply pipe 12b outputting from the water chamber 12, and the temperature of hot water during hot water supply (hereinafter referred to as hot water temperature) To can be detected as its output. different.

The mutual relationship between the bathtub 10 and the bathtub B is also almost the same as in FIG. 3. However, a bath temperature detector 32 is installed in the bathtub B to detect the temperature T1 of the bath water in the bathtub B (hereinafter referred to as bath temperature), and two water level detectors 41 and 42 are installed. be. The water level detector 41 detects when the bathtub B is full of water,
The output is connected to the hot water supply valve 12c via the relay contact F, and the water level detector 42 detects that the water level in the bathtub B is higher than the operable water level of the circulation pump 14a, and the output is connected to the relay contact F and It is connected to the circulation pump 14a via the OR gate 43, the relay contact A, the AND gate 44, and the OR gate 43. However, the relay contact F is closed in the hot water filling mode of the temperature control device, and the relay contact A is closed in the reheating mode, and these are normally open contacts of relays A and F, respectively, not shown.

The hot water temperature setting device 20 has a normally closed relay contact A,
A manual hot water temperature setting device 21 connected to the addition terminal of the comparator 25 via F, and a hot water temperature setting device for reheating to which the output of the comparator 33 is input and connected to the comparator 25 via the relay contact A. 22 and the output of the comparator 33, and the output of the comparator 25 is inputted via the relay contact F.
The latter two include a control signal C indicating the operating state of the circulation pump 14a and a bath temperature setting device 3, which will be described later.
The output of 1 is also input.

The comparator 25 inputs the hot water temperature setting value Q, which is the output of the hot water temperature setting device 20, to its addition terminal, and inputs the hot water temperature detector 12d to its subtraction terminal.
The hot water temperature To from is input.

Appears in the output of the comparator 25, and the hot water temperature setting value Q
An error signal ΔTo indicating the difference between the temperature and the hot water supply temperature To is input to the burner control device 26, and its output is input to the burner 11 of the bathtub 10.

The bath temperature setter 31 is a manual setter for setting a desired bath temperature, and its output, the bath temperature set value P, is input to the addition terminal of the comparator 33. On the other hand, the subtraction terminal of the comparator 33 is connected to the bathtub B.
The bath temperature T1 from the bath temperature detector 32 installed inside the bathtub is input, and the error signal ΔT1=P−T1 from the comparator 33 is input to each hot water temperature setting device for reheating and filling, as described above. 22 and 23, and is branch-connected to the set terminal S and reset terminal R of the flip-flop memory 45 via two comparators 46 and 47 whose threshold values are β and 0. . The output of the flip-flop memory 45 is connected to one input terminal of the AND gate 44 mentioned above.

The operation of the temperature control device having such a configuration is as follows.

When the mode selection switch (not shown) is operated to switch to the manual mode, both relays A and F (not shown) are reset, so that the manual hot water temperature setting device 21 is connected to the comparator 25, while the reheating mode is connected to the comparator 25. Each hot water supply temperature setter 22, 23 for filling hot water and water level detectors 41, 42 are separated from the system,
Therefore, the control device operates only with a hot water temperature control system including the manual hot water temperature setting device 21, the comparator 25, the burner control device 26, the burner 11, and the hot water temperature detector 12d. That is, at this time, general hot water is supplied through the hot water supply pipe 12d by opening the hot water supply valve in the place where hot water is used other than the bath, and the hot water temperature To at that time is determined by the manual hot water temperature setting device 21. The burner control device 26 performs blinking control of the burner 11 based on the error signal ΔTo so that the burner 11 matches the manually set value.

The left end of each curve in FIG. 2 indicates the state of each part at this time, and the water level in bathtub B is zero (curve a in the figure, hereinafter simply referred to as a), and the circulation pump 14a is stopped (b), and hot water temperature setting device 2
The hot water temperature setting value Q from 0 is a constant manual setting value set in the manual hot water temperature setting device 21 (c, symbol M shown below the curve (c)), and the bath temperature T1
is undefined (d), and the operation mode is manual mode (e).

When you operate the operation switch and set it to hot water filling mode
(e) Since the relay F is activated, the manual hot water temperature setting device 21 is disconnected, the hot water filling temperature setting device 23 is turned on, and the bath temperature control system starts operating. At the same time, the output of the water level detector 41 sends a signal to the hot water supply valve 12c, which is opened, and filling of the bathtub B with hot water begins.
(a). The circulation pump 14a maintains the bathtub water level at a constant level.
Since it does not exceed CL, it has not started yet (b) and is protected from dry running.

In addition, the hot water supply temperature set value Q at this time is determined based on the control signal C that the circulation pump 14a is stopped, and the bath temperature set value P from the bath temperature setting device 31 is used as it is for supplying hot water for filling hot water. Temperature setting device 2
It is assumed that the output is bypassed to the output side of No. 3 (curve c and the note F below it). Therefore, the temperature of the hot water supplied to the bathtub B is controlled to be the bath temperature set value P set in the bath temperature setting device 31, but in this state, the circulation pump 14a is stopped. Because the bathtub B is cold, the bath temperature T1 tends to be lower than the bath temperature set value P (d).

When the water level in the bathtub B exceeds a certain level CL at which the circulation pump 14a can operate, the water level detector 42
detects this (a), the signal is transmitted to the circulation pump 14a via the relay contact F and the OR gate 43, and the circulation pump 14a starts (b). When the start information of the circulation pump 14a is provided to the hot water filling temperature setting device 23 via the control signal C, the input is the error signal ΔT1 from the comparator 33.
(c). As a result, the bath temperature control system is completed, and cascade control for the hot water supply temperature control system is started. That is, the hot water temperature setting device 23 for hot water filling inputs the error signal ΔT1, and
This is amplified using an appropriate control constant, and comparator 2
The control amplifier continues to operate as a control amplifier that provides the hot water supply temperature set value Q to the control amplifier 5. Next, bathtub B
The temperature of the hot water filled inside (bath temperature) T1 is
The hot water filling operation continues while being automatically controlled to reach the bath temperature set value P set by the bath temperature setting device 31 (a), (d), and (e).

When the water level detector 41 detects that the bathtub B is full of water (or a predetermined bathing water level), this signal is sent to the hot water supply valve 12c, which is closed to complete hot water filling (a) . At the same time, the temperature control device shall automatically shift from hot water filling mode to hot water mode (e).

When the temperature control device shifts to reheating mode,
Since relay F returns and relay A operates, the AND gate 44 blocks the signal from the water level detector 42 to the circulation pump 14a. Therefore, the circulation pump 14a stops (b), and the control device goes into a standby state (e). In the hot water temperature setting device 20, the hot water heating temperature setting device 23 for hot water filling is disconnected, and the hot water heating temperature setting device 22 for reheating is turned on in its place. It is selected by the temperature setting device 31 and outputs a constant value of the bath temperature set value P plus α (α≧0) as the hot water temperature set value Q (c). Here, it is assumed that α is selected to a value that does not pose any danger to the user even if he or she attempts to use hot water in a hot water area other than the bath and opens the hot water supply valve there. In this state, the hot water supply temperature control system is on standby after receiving the hot water supply temperature set value Q=P+α. 10 heat-retaining operations are being continued.

On the other hand, the bath temperature T1 is β from the bath temperature set value P.
When the comparator 46 detects that the voltage has dropped below (d), the output signal opens the AND gate 44 via the flip-flop memory 45.
The circulation pump 14a is restarted (b), and the control device is operating in the refueling mode (e). Circulation pump 14
When the restart of a is transmitted to the reheating hot water temperature setting device 22 via the control signal C, its input is switched to the output side of the comparator 33, and at the same time, its output, the hot water temperature setting value Q, is , is forced to its maximum value (c). Therefore, the subsequent hot water supply temperature control system is controlled so that the hot water supply temperature To becomes the maximum value, and the bath water circulated through the circulation paths 14, 14 is heated to the maximum temperature in the water chamber 12. Because it passes through the flexible pipe 13, the bathtub 10 can perform the flushing operation with maximum efficiency.

When the bath temperature T1 rises and recovers due to the reheating operation and approaches the bath temperature set value P, the error signal ΔT1 from the comparator 33 becomes smaller, so the value of the hot water temperature set value Q also follows and returns to the original value. of (P+α)
Set the hot water temperature setting device 22 for reheating so that it approaches
is controlled (c). Also, when the bath temperature T1 reaches the bath temperature set value P (d), the hot water supply temperature set value Q
returns to Q=(P+α) (c). At the same time, the comparator 47 detects that the error signal ΔT1 has become zero, and its output is sent to the flip-flop memory 4.
5 is reset, the AND gate 44 stops the circulation pump 14a (b), and the control device returns to the standby state again (e).

Thereafter, in the same way, the standby and operating states are repeated in the reheating mode (e), (c), and (d), so that the bath temperature T1 can be maintained at the bath temperature set value P.

When you have finished using the bath, you can switch the operation switch to manual mode and use it for general hot water supply.

In addition, in the above explanation, the transition from hot water filling mode to hot water mode was assumed to be an automatic transition upon completion of hot water filling, but it was also possible to manually transition to hot water mode using an operation switch. Of course, you can leave it as is.

In the above explanation, each component constituting the control device was assumed to be composed exclusively of hardware including an analog arithmetic unit and a logic circuit, but all or part of this is operated within a microcomputer. Needless to say, this can also be realized using software.

Furthermore, although the burner control device 26 controls the burner 11 to blink in response to the error signal ΔTo that is its input, this may be replaced with a continuous control type that includes a function to adjust the thermal power of the burner 11. shall be.

In addition, the hot water temperature setting devices 22 and 23 for reheating and filling hot water are not only separate;
As a common feature, relay contacts A, F and control signal C can be used to switch and operate each of the above-mentioned operations.

Effects of the Invention As explained above, according to the present invention, a bath temperature setting device, a hot water temperature setting device, and a burner control device are provided, and in the manual mode, a hot water temperature set value is manually set in the hot water temperature setting device. Only the hot water temperature control system that controls the hot water temperature is operated with the target value set as the target value, while in the hot water filling mode and recharging mode, the bath temperature is controlled using the bath temperature set value manually set in the bath temperature setting device as the target value. By configuring a bath temperature control system that performs cascade control of the hot water supply temperature control system, the hot water temperature setting device that is manually set during general hot water supply can be used to control the hot water temperature when filling and refilling the bath. It acts as the operating end of the temperature control system and works to generate the optimal hot water temperature setting value to maintain the bath temperature at a predetermined value, so there is no need to reset the hot water temperature setting device when switching modes. When irrigating, for example, it is extremely easy to forcibly set the hot water temperature setpoint to the maximum value at the beginning, and at the end to a safe value that is equal to or slightly higher than the bath temperature setpoint. Yes, therefore,
Even if the bathtub is of the type with a water chamber, it is possible to carry out the refilling operation with maximum efficiency, and there is no risk of over-temperature hot water being supplied and posing a danger to the user. There is an extremely excellent effect that there is no

Furthermore, not only can you use hot water at an appropriate temperature for general hot water supply, but you can also fill the bathtub with hot water while controlling the temperature using the bath temperature control system, so you can always fill the bathtub at the appropriate temperature. It also has the advantage of being convenient for use.

[Brief explanation of drawings]

1 to 3 show an embodiment; FIG. 1 is an overall system diagram, FIG. 2 is an operational diagram, and FIG. 3 is an explanatory diagram of the overall structure of the bathtub and attached equipment. B... Bathtub, P... Bath temperature set value, Q... Hot water supply temperature set value, T1... Bath temperature, To... Hot water supply temperature, ΔT1, ΔTo... Error signal, 11... Burner, 12... Water Chamber, 12a... Water supply pipe, 12b...
... Hot water pipe, 13 ... Serpentine pipe, 14 ... Circulation path, 14
a...Circulation pump, 20...Hot water temperature setting device, 2
6... Burner control device, 31... Bath temperature setting device.

Claims (1)

[Scope of Claims] 1. A burner, a water chamber directly heated by the burner, and a flexible pipe housed in the water chamber. The connecting pipe is connected to the bathtub via a circulation path with a circulation pump, so that it can be used not only for general hot water supply but also for filling and draining the bathtub. This is a temperature control device for a two-channel bath pot, which includes a bath temperature setting device for manually setting the bath temperature set value, and a constant manually set hot water temperature set value in the manual mode, and a hot water filling mode. and a hot water temperature setter that generates a hot water temperature set value regulated by an error signal between the bath temperature set value and the bath temperature, and an error signal between the hot water temperature set value and the hot water temperature in the reheating mode. 1. A temperature control device for a one-can, two-channel bath pot, comprising: a burner control device for blinking and controlling the burner. 2. The one-tub, two-channel bath according to claim 1, wherein the circulation pump is operated in the hot water filling mode only when the water level in the bathtub is above a predetermined constant level. Temperature control device in the pot. 3. In the hot water filling mode, the hot water supply temperature set value is the same constant value as the bath temperature set value before the circulation pump starts operating, but after the circulation pump starts operating, the bath temperature is set to the same value as the bath temperature set value. 3. The temperature control device for a one-can, two-channel type bathtub according to claim 2, wherein the temperature control device is a continuously changing value for controlling the burner control device so as to match a temperature setting value. 4. In the reheating mode, the circulation pump is operated when the bath temperature drops from the bath temperature set value to a predetermined temperature or less, and is stopped when the bath temperature recovers to the bath temperature set value. A temperature control device for a one-can, two-channel bathtub according to any one of claims 1 to 3, characterized in that: 5. In the reheating mode, the hot water temperature set value is forcibly set to its maximum value when the circulation pump starts operating, and is set equal to or slightly higher than the bath temperature set value when the circulation pump stops. 5. The temperature control device for a one-can, two-channel bathtub according to claim 4, characterized in that the temperature changes continuously during the reheating operation so that the temperature changes continuously during the reheating operation.