JPS603721A - hot water mixing device - Google Patents

Abstract

PURPOSE:To control efficiently mixed hot water by providing a mixing valve and a control valve, which controls the quantity of mixed hot water, independently of each other and controlling the quantity of mixed hot water and the temperature of mixed hot water independently of each other. CONSTITUTION:A hot water supply heat source machine 20 consists of a heat exchanger 21 and a burner 22, and hot water is sent to a mixing valve 24 through a hot water-side flow passage 23 and joined with cold water of a similarly connected cold water-side flow passage 25, and a mixture ratio of the quantity of hot water and that of cold water is changed, and water is taken out from a mixed hot water flow passage 26. This mixed hot water flow passage 26 is provided with a temperature detector 33, which detects the temperature of mixed hot water, and a temperature setter which sets this temperature, and the mixing valve 24 and a control valve 34 provided on the hot water flow passage 26 are controlled on the basis of signals of the detector 33 and the setter 36.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention mixes water and water to provide water at a set temperature. This invention relates to a hot water mixing device.

Conventional Structure and Problems Conventionally, this type of hot water mixing device has a structure as shown in FIG. That is, in FIG. 1, the valve shaft 1 is moved forward and backward by the drive of a servo motor 1'.

Reference numeral 2 designates a double-sided valve on the local side for adjusting the high-temperature local claw. Reference numeral 4 denotes a single-sided valve on the water side for adjusting the amount of cold water, and a spring 5 is interposed between it and the double-sided valve 2 on the water side.
Movement only in the direction of the double-sided valve 2 on the local side for i1+ 1 0
■It is a Noh performance. Further, 6 is one station side seat formed at the outlet of the hot water supply path 8 in the station side valve chamber 7, and 9 is the other ~ side formed in the station side valve chamber 71 opposite to the hot water side seat 6. The station-side seat 9 is also disposed between the station-side valve chamber 7 and a mixing chamber 11, which will be described later. The hot water side double-sided valve 2 is installed between these two hot water side seats 6.9, and the hot water side double-sided valve 2 approaches and separates from the two hot water side seats 6.9 by moving the valve shaft 1 back and forth in opposite directions. are in a relationship,
The opening degree of each can be adjusted. 10 is water (the water supply channel 12 in the mixing chamber 11 which also serves as the ITj valve chamber);
A water-side seat is formed at the outlet of the water-side seat 10, and the water-side single-sided valve 4 is brought into contact with and separated from the water-side seat 10 by moving the valve shaft 1 forward and backward to change and adjust its opening degree.

Note that water whose pressure has been reduced by a pressure reducing valve 13 is heated by a heat exchanger 14 of a water heater and then supplied to the hot water supply path 8.

The branch between the water supply channel 12 and the hot water supply channel 8 is after the pressure reducing valve 13,
Therefore, there is no large difference in pressure between the water supply channel 12 and the hot water supply channel 8.

As for the operation of this conventional example, first, when the valve stem 1 reaches the left limit position and the double-sided valve 2 on the hot water side, which is integrated with the valve stem 1, contacts the hot water side seat 6 and closes the hot water supply path 8, high-temperature hot water from the hot water supply path 8 is released. The mixing chamber 1 can only be accessed through the throttle hole 3 drilled in the double-sided valve 2 on the hot water side.
A certain minimum amount flows into 1. On the other hand, the water-side single-sided valve 4 is sufficiently forward from the water-side valve 10 and its opening is at its maximum, allowing a large amount of cold water from the water supply channel 12 to flow into the mixing chamber 11, and allowing the lowest temperature hot water to flow out. Eggplant. Next, in state r where the valve stem 1 moves to the right and the hot water side double-sided valve 2 is located in the middle of the hot water side seat 6.9, the opening degree of the hot water side double-sided valve 2 is maximum, and the opening degree of the water side single-sided valve 4 is the maximum. The amount of water decreases, resulting in medium-temperature hot water. When the valve stem 1 is further moved to the right, the hot water side double-sided valve 2 approaches the hot water side seat 9 and its opening is reduced, and the water side single-sided valve 4 comes into contact with the water side seat 10 and is fully closed. Take a bath. Here, if the amount of hot water that comes out is large and exceeds the capacity of the FMFIIi device passes through the heat exchanger 14 of the water heater, the temperature of the hot water drops, so the valve shaft 1 moves further to the right and moves to the hot water side double-sided valve 2. is moved against the spring 5 to adjust the amount of water, and finally the hot water side double-sided valve 2 contacts the 27% ff1JI seat 9 and closes it, and the water side seat is also kept fully closed and throttled through. A small amount of hot water at maximum temperature is supplied only from hole 3. In this way, one valve serves both as a mixing valve and as a water volume regulator when dispensing a large amount of hot water. Here, the role of the throttle hole 3 is that when the sensed temperature is extremely low compared to the set temperature, the servo motor moves to the right and fully closes both the hot water side and the water side, but if there is no throttle hole 3 This prevents a situation in which the temperature sensed by the outlet hot water temperature sensor installed in the mixed station outlet 15 remains low and does not return to normal.

Since the conventional pumped water mixing device was constructed as described above, it had the following drawbacks.

(1) Since one valve serves as both a mixing valve and a water amount control valve, it was not possible to control the temperature of mixed hot water and the amount of mixed hot water independently.

(2) Due to the structure of the valve, while the valve stem is moving as far to the right as possible, where water flow is regulated, to the area where the valve stem is moving leftward and normal mixing operation is performed, the highest temperature water is required. It was difficult to use and dangerous because it passed through an area where a large amount of hot water was dispensed.

(3) Because there is a restriction hole, hot water mixes even when the hot water side is fully closed, making it impossible to obtain a low temperature within a certain range from the water temperature.

OBJECTS OF THE INVENTION The present invention provides a pumped water mixing device that eliminates such conventional drawbacks, and uses a mixing valve that mixes hot water and a control valve that controls the amount of mixed hot water to adjust the temperature of mixed hot water. The purpose of this invention is to realize a turbid water mixing device that can independently adjust the amount of mixed hot water.

Structure of the Invention In order to achieve this object, the present invention provides a hot water supply heat source device, a hot water side flow path, a water side flow path, a mixing hot water flow path, a mixing valve that changes the mixing ratio of dry water and water, and a mixing valve that changes the mixing ratio of dry water and water. A control valve that controls the amount of mixed hot water provided in the hot water flow path, a temperature detector that detects the mixed hot water temperature,
A temperature setting device to set the mixed water temperature? A hot water mixing device is configured with a control device that controls a mixing valve and a control valve,
Control the mixing valve so that the temperature set by the temperature setting device matches the temperature detected by the temperature detector, and if the water temperature of the hot water heat source device does not reach a predetermined value or if it is necessary to vary the mixing 1ffi. The amount of mixed hot water is controlled by a control valve.

DESCRIPTION OF EMBODIMENTS Next, embodiments of the present invention will be explained based on FIGS. 2 to 4.

FIG. 2 is a diagram showing a hot water supply system using the pumped water mixing device of the present invention. The hot water heat source device 20 is composed of a heat exchanger 21 and a bar 22, and the hot water produced is passed through a hot water side flow path 23. Hot water is provided. The hot water side flow path 23 is connected to a mixing valve 24, and merges with the similarly connected water side flow path 25 to form a mixing vortex flow path 26. This mixing valve 24 is the third
It is configured as shown in the figure. The hot water side valve body 27 and the water side valve body 28 normally move in parallel according to the left and right movement of the shaft 29, and change the opening ratio of the hot water side flow path 23 and the water side flow path 25 in inverse proportion, respectively. It controls the mixing ratio of hot water and water. The drive is performed by a motor 30 via a deceleration mechanism 31. The open/close states of the hot water side valve body 27 and the water side valve body 28 are detected by microswitches 32 and 32'. In this case, the temperature of the mixed water is detected by a thermistor 33, which is a temperature detector provided integrally with the mixing valve 24. Second again
Returning to the figure, a control valve a4 is provided in the mixing vortex flow path 26 to increase or decrease the amount of mixed hot water. The mixed hot water flows through the mixing vortex channel 26
The water is supplied from the terminal's faucet 35 through the terminal. A temperature setting device 36 for setting the mixed water temperature is provided near the faucet 35, and the mixed water temperature detected by the thermistor 33 and the set temperature set by the temperature setting device 36 are compared by a control device 37. Move the mixing valve 2 to the position of the mixing ratio of the pumped water that provides the set temperature.
Control 4. Further, a control device; 37 controls the control valve 34 to increase or decrease the amount of mixed hot water.

Here, the control valve 34 is constructed as shown in FIG. In FIG. 4, the opening degree of the mixing vortex flow path 26 is adjusted by a valve body 38 to control the amount of mixed hot water.

The valve body 38 is fixedly provided to +iQt+ 39 and is connected to the shaft 3.
9 is driven in the vertical direction by a motor 40 via a deceleration mechanism 41. 42 is a microswitch, and the valve body 38
The closure of is detected.

Ic C (DA, Ia 16, O,. 1 During normal mixing operation, the control valve 34 is fully open, and the temperature setting device 36
The hot water side valve body 27 and water side valve body 28 of the mixing valve 24 are at a position where the pumped water has an appropriate mixing ratio so that the set temperature of the motor 3 is reached.
Driven at 0. Driving is performed until the mixing ratio reaches a position where the set temperature of the temperature setting device 36 and the detected temperature of the thermistor 33 match. If the mixed water temperature deviates from the set temperature due to some disturbance, the valve body position is immediately corrected to maintain the set temperature.

When the faucet 35 is opened wide and a large amount of hot water is dispensed,
The amount of water passing through the heat exchanger 21 of the hot water supply heat source device 20 increases. When the amount of water flowing exceeds the heating capacity of the hot water heat source device 20, the temperature of the supplied hot water begins to drop. For this reason, the mixing valve 24
The hot water side valve body 27 opens the hot water side flow path 23, and the water side valve body 28
The valve shaft 29 is driven in the direction of closing the water side flow path 25, that is, the valve shaft 29 is driven to the left in FIG. If the mixed hot water temperature as set cannot be obtained even when the station side valve body 27 and the water side valve body 28 are moved to the left as much as possible and the microswitch 32' is activated, that is, the amount of water supplied is zero, , the control valve 34 squeezes out the mixing vortex flow path 26 and reduces the amount of hot water dispensed to a flow rate at which the hot water temperature set by the temperature setting device 36 is obtained.

In this case, the minimum flow rate to be throttled is controlled by the control device 371, and is guaranteed by the valve body 38 opening the mixing flow path to some extent. When transitioning from the water flow regulation state where the hot water output volume is reduced to the normal mixing state, that is, when the set temperature of the temperature setting device 36 is lowered, first the mixing valve 2
The station side valve body 27 and the water side valve body 2 until the temperature reaches the set temperature 1.
8, the control valve 34 is gradually opened. For this reason, unlike in the past, a large amount of hot water is not temporarily tapped out.

The water volume regulation operation is also carried out when the heat exchanger 21 of the hot water heater 20 is cold and the water temperature is low even if a large amount of hot water is not dispensed. It can speed up the rise in temperature.

The temperature level of the mixed hot water is determined when the valve shaft 29 of the mixing valve 24 moves to the left as much as possible, the local valve body 27 fully opens the hot water side flow path, and the water side valve body 28 fully closes the water side flow path 25. From this state, valve stem 2
By moving 9 to the right as much as possible to a state where the relationship is just the opposite, the water temperature can be evenly taken from the maximum temperature to the freezing temperature.

Furthermore, if it is desired to completely stop the supply of mixed hot water, a command is issued using the temperature setting device 36, and the control valve 34 fully opens the mixed hot water flow path, giving priority to securing the minimum flow rate when regulating the water amount. In this case, in order to return, it is necessary to issue a reset command again using the temperature setting device 36.

Furthermore, in order to use the mixed hot water for a shower or the like and obtain a pine surge effect, the amount of mixed hot water can be increased or decreased by the control valve 34, thereby making it possible to fluctuate the amount of hot water.

The above explanation explains how the mixing valve 24 is connected to the station side flow path 23 and the water side flow path 2.
In this example, the mixing valve is provided at the junction of the hot water side flow path and the water side flow path on the upstream side of the hot water supply heat source 2o, and the mixing valve is installed at the branching point between the local side flow path and the water side flow path on the upstream side of the hot water supply heat source 2o. It may also be configured to change the branching ratio of. In this case, the arrow indicating the flow direction of the d joint valve 24 shown in FIG. 3 is in the opposite direction, and the water flowing in from the lower side is distributed by the valve body to the hot water side and the water side.

In this embodiment, the control device 37 controls the mixing valve 24 to reduce the amount of water in the water side flow path 25 and even if the hot water side flow path 23 is fully opened, the temperature in the field from the hot water heat source device 20 is low, and the mixed water temperature is low. If the amount of hot water does not reach the set value, the amount of mixed hot water is reduced by the control valve, so it is possible to maintain the hot water temperature in the event that a large amount of hot water exceeds the heating capacity of the hot water supply heat source device 20, and to prevent the temperature rise at the start of hot water supply. It has the effect of speeding up.

In addition, since the amount of mixed hot water can be increased or decreased with a control valve independent of the mixing valve, it has the effect of making it possible to perform pine surge due to large amount fluctuations when using a shower.

Effects of the Invention The present invention has the following effects because it independently provides a mixing valve and a control valve for controlling the amount of mixed hot water.

(1) Set the mixing valve and the control valve that controls the amount of mixed water at 7°.
″'c$#fCLz4f, -h, W@#him (D control and 8I 1 quantity control can be performed independently, and after controlling the mixed water temperature, the control valve is controlled when regulating the water quantity. The mixing valve and the fi control valve can be controlled sequentially or simultaneously, such as hot water flow fluctuation control that controls the mixed hot water temperature and mixed hot water amount.

(2) Since it is possible to control the opening operation of the control valve after controlling the mixed water temperature, the maximum temperature rise that occurs when the temperature setting is changed when regulating the water amount as in the past is avoided. This prevents inconveniences such as temporary hot water being poured in large amounts.

(3) Since there is no need to provide a throttle hole in the valve body of the mixing valve, it is possible to maintain an arbitrary level of temperature from the station to the water, and it is also possible to stop the hot water output using the control valve.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional hot water mixing device, Fig. 2 is a diagram of a hot water supply system using a hot water mixing device according to an embodiment of the present invention, and Fig. 3 is a partial cross section of a mixing valve used in the system. 4 are partial sectional views of the control valve used in the system. 20...Hot water heat source machine, 23-...Station side flow path, 24
Mixing valve, 25...Water side flow path, 26...Mixing vortex flow path, 33 Thermistor (temperature detector), 34 Control valve, 36
Temperature setting device, 37 control device. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure-123- Figure 4 0

Claims (3)

[Claims] (1) The heating heat source device, the hot water side flow path, the water side flow path, the mixed hot water flow path where the hot water side flow path and the water side flow path merge, the amount of hot water in the hot water side flow path, and the water side A mixing valve that controls the mixing ratio of hot water and hot water by changing the amount of water in the flow path, a control valve that controls the amount of mixed hot water provided in the mixed hot water flow path, a temperature detector that detects the temperature of the mixed hot water, and a mixing local part. A hot water mixing device comprising a temperature setting device for setting, and a control device for controlling the mixing valve and the control valve based on signals from the temperature detector and the temperature setting device. (2) The control device controls the control valve when the temperature detected by the temperature sensor does not reach the set value even when the mixing valve throttles the water flow in the water side flow path and the station side flow path is fully open. The hot water mixing device according to claim 1, which performs control to reduce the amount of mixed hot water. (3) The pumped water mixing device according to claim 1, wherein the control device performs control to repeatedly vary the amount of mixed hot water using a control valve.