JPS63303281A - Constant flow rate valve having water temperature correction function - Google Patents

Abstract

PURPOSE:To obtain the proper proportional correction function of the flowing water quantity for the water temperature variation by foaming a governor spring from the temperature sensitive material which possesses a spring constant which varies according to the water temperature variation. CONSTITUTION:A movable valve body V2 is urged in the separating direction for a valve body V1 by a governor spring 1, and superposition arranged on a same axis center. The governor spring 1 is made of the temperature sensing material such as shape memory alloy whose spring constant varies according to the water temperature variation. The valve senses the flowing water pressure for the variation of the supplied water pressure, and keeps the valve opening degree of the fixed valve body V1 and the movable valve body V2 constant. The governor spring 1 senses the water temperature for the water temperature variation and automatically controls the valve gap between the fixed body V1 and the movable valve body V2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a constant flow valve used in water heaters and the like, which has both a water governor function and a water wetness correction function.

Conventional technology For example, in a water heater, a constant flow valve is installed in a heat exchanger, which has a governor function that automatically controls fluctuations in water pressure, and a water temperature correction function that adjusts the amount of water supplied according to seasonal changes in water temperature. The conventional technology is to incorporate valve seats into the water supply channel so that hot water at the desired set temperature can always be obtained, but as shown in Figure 3 of the attached drawings, ) (21', (3)' and a through hole (47) in the middle part of the peripheral wall of the fixed valve body W1)',
The valve seat (2)z (3J') of the fixed valve body cJ1) has valve parts (5)', (6)' on the upper and lower sides that come into contact with and separate from it, and the lower part has a flow passage (7r) that is slidably and tightly fitted. and the flow path (7r on the upstream side (
7a) and the downstream side (7by), the upstream side (7a)' of the differential pressure plate (8)' and the fixed valve body CVσ
The governor spring (1)' is connected to the movable valve body (V2)' which has a through hole αγ that communicates the communication hole (9r) with the upper part of the The valve body CJ11, (v2)' has a thermo wax which expands and contracts by sensing the temperature of the water supply in the flow path (7y) at the upper part of the valve body CJ11, (v2)'. A water temperature sensor (11r) is fixedly installed and the water temperature sensor (ll
The operating shaft (12, 1') and the spring receiver (
18)' Connect the valve shaft 04 and Y to the valve body CV.
l)' , (72)''? i: Penetration and W on the lower end
4 Adjustment W (VaJ' is fixed, and the adjusting valve ■3A is attached to the movable valve body (a valve seat that also serves as a receiver for V27 (provided so as to come into contact with and separate from I5y, and the fixed valve body (the upper part of V+7 and Spring receiving 0
It has a structure in which a return spring (1G) is interposed between 31' and a governor spring (1y) and a differential pressure plate (8 )′ and the fixed valve body (V+χ
(21', (37) and the valve part (54', (61') of the valve body V2γ are automatically controlled so that the flow rate is constant, and the valve opening degree is automatically controlled to keep the flow rate constant. The water temperature sensor (Ill' senses water i'III and the thermowax expands and contracts, causing the regulating valve (V3) to move up and down via the valve shaft 049', causing the regulating valve ■ and its valve seat ( b) By adjusting the opening degree of the valve y wide and narrow to increase or decrease the supply flow wrinkles, the above governor function and this water temperature correction function make it possible to obtain hot water at the desired set temperature all year round. An application example in which the above-mentioned conventional water temperature correction constant flow lid valve is incorporated into a gas water heater will be explained based on FIG. Therefore, when the hot water tap is opened, the water flow switch (S+J'
turns ON and the original solenoid valve (Mv
17 and the main solenoid valve (MV, y) are activated, and the fuel gas is automatically transferred to the solenoid valve (MvIy) → the main solenoid valve (MV2y-gas governor (Vs7) to the solenoid proportional valve (m, 7 to match the set temperature) By being controlled and supplied to the main burner 00)', hot water at a constant temperature can be obtained. This is to connect the water supply pipe U to the hot water supply front sail and the heat exchanger 07)' through the Chatsuki valve bleacher, and this circulation path is used to prevent after-boiling and freezing. Note that ωγ is Forced air supply fan (
S2y is wind pressure switch, boha pilot burner, cJ7
y is a drain valve.

Therefore, by automatically controlling rice field fluctuations using the governor function and by increasing/decreasing the flow rate in response to changes in water temperature using the water temperature correction function, hot water can always be supplied at the desired set temperature, and there is no change in the hot water temperature. This prevents the equipment from reaching its maximum capacity during low winter temperatures.

``Problems to be Solved by the Invention'' Conventional constant flow valves with water flow correction have a fixed valve body (V
, )' and a movable valve body (VJ), and a water temperature correction function consisting of a water temperature sensor TUY and an adjustment valve (VAN, etc.), so the entire valve becomes significantly larger. In addition, since the water temperature correction function is provided in the water supply path, it becomes an obstacle, adding resistance to the passage of flowing water and significantly increasing pressure loss.

Therefore, the present invention provides a constant flow valve Ti with water temperature correction, which aims to eliminate the above-described shortcomings of the conventional valve by forming the governor spring with a heat-sensitive member.

Means for Solving the Problems This invention provides a hot water supply system in which a movable valve body (2) is biased in a direction away from a fixed valve body (Vt) by a governor spring (1) and arranged overlappingly on the same axis. In the case of constant flow wrinkle stretching, which is automatically controlled at a constant constant level by the governor function using a fixed valve body Cv1) and a movable valve body ffd, the amount of water flowing in a vessel, etc. or hydraulic pressure change is always maintained at a constant level by the governor function (1)'. We have solved the above problem by using a technical method that automatically increases or decreases the water supply to adapt to changes in water temperature due to seasons, etc. by making it made of a heat-sensitive material such as a shape memory alloy whose spring constant changes according to the water temperature. This is an attempt to solve the problem.

For example, if a constant flow valve with water wetness compensation of the above configuration is installed in the water supply channel to the heat exchanger in a water heater, etc., when the water supply pressure fluctuates, it senses the flowing water pressure and adjusts the fixed valve body. (vl)
The valve opening between the valve body and the movable valve body is kept constant, and water flow to the heat exchanger is automatically controlled to be constant at all times. For example, when the water temperature changes between summer and winter, the governor spring (1) senses the water temperature and changes its spring constant, and the governor spring (1) senses the water temperature and changes its spring constant. By automatically adjusting the valve gap to a wide or narrow one, it is possible to ensure water flow wrinkles commensurate with the water temperature.

Thus, the governor function and the water temperature correction function ensure that hot water is always supplied at the desired set temperature.

Embodiment The following is an embodiment of a constant flow valve with water temperature correction according to the present invention.
The explanation will be based on the ft-plane.

In Figures 1 and 2, (VIJ is a fixed valve body with valve seats (2+, (3J) at the top and bottom, and a through hole (4 holes) in the middle part of the peripheral wall, and its lower end is inserted into the flow path (7). Mounting part c!4
1 is airtightly fitted to the inner wall surface of the flow path (7) with a seal (2) interposed therebetween and fixed by a retaining ring (4), and the flow is allowed to flow through the through hole (4) of the fixed valve body (4). The upstream side (7b) and the downstream side (7C) of the differential pressure plate (8) in the movable valve body (Vz) (to be described later) are connected to the fixed valve body (V1) of the passage (7). (Vd is the square of the fixed valve body (V)) (2+, (valve part (5) that approaches and separates from 3J).

(6) on the upper part 1, and the lower part is fitted with a seal (a) so that it can freely slide into the flow path (7).
It is equipped with a differential pressure plate (8) that separates the upstream (10 (7aJ) and downstream (7b) & A communication hole that communicates (
9) is a movable valve body with a through hole QQ bored through the center and communicating the communication hole (9) with the first flow side (7b) of the differential pressure plate (3), and the fixed valve body 0/ l) Insert the upper end of the fixed valve body (vI) into the valve body and attach both valve bodies with the governor cage (1) interposed between the lower end of the fixed valve body (vI) and the differential pressure plate (3) of the movable valve body (v2). (2+, (3J and Valve part (5).

The valve opening according to (6) is automatically controlled so that the foot forging is constant. In addition, 翰 is a receiving ring that receives the moshuwari, and 雰 is a retaining ring of the receiving ring 4.

The governor spring (υ) is formed of a heat-sensitive member whose spring constant changes according to changes in water temperature. For example, when a shape-memory base metal is used as this heat-sensitive member, the spring constant changes depending on the temperature of the shape-memory alloy. Generally, the load characteristics are as shown in the curve shown in Figure 3.
Excursion is carried out so that the range of 2 is within the actual temperature actually used. As a result, the spring load is proportional to the change in water temperature.The valve gap between the fixed valve body CJ1) and the movable valve body (V2) also increases or decreases proportionally, so the supply flow rate also increases or decreases proportionally depending on the water temperature. It turns out.

In the above configuration, in response to fluctuations in water supply pressure, the fixed valve body (VtJ valve seat) (2+, (3) Body (v2
)'s valve part (51, (61) by the governor function that automatically controls the valve opening B so that the flow rate is constant. The governor blade (1) senses the water temperature and calculates its temperature constant'
f: Valve seat between the fixed valve bodies to be changed) (2+
, (3) and the valve parts (5) and (6) of the driving unit K (Vd) are automatically adjusted to wide and narrow to ensure the amount of supplied water that matches the water temperature.In other words, during summer, etc. When the water flow is high as in
, (3) and the valve portions (5), (6), the gap between the valve 114 and the valve portions (5) and (6) is kept wide, increasing the amount of supplied water, and furthermore, the governor function stabilizes the water flow wave. In addition, when the water temperature is low, such as in winter, the governor spring (1) senses this and lowers the spring force to weaken its elastic force (valve seat) (21
, (3) and valve parts (5) and (6) are kept narrow and the amount of supplied water is reduced.Furthermore, the governor function stabilizes the water flow waves, making this 7" 14 water heater When applied to water, etc., it is possible to always obtain hot water at the desired set temperature (see Figures 1 and 2, the amount of gas does not increase or decrease in response to changes in water temperature).

Next, an application example Ti of the constant flow lid valve with water flow correction will be described based on the drawings. Figure 2 is an example of application to a gas water heater, where constant flow vibration '4P is the water supply channel (
7). When the hot water tap CJ4) is opened to supply hot water, the water flow switch <SV detects the flowing water and turns on, thereby turning on the solenoid valve (M) installed in the gas supply path (]8).
V+ ) and the main solenoid valve (M″J2) operate, and the fuel gas flows through the original solenoid valve (lilV, J-main solenoid valve (1#2J-
Through the gas governor 4), it is automatically controlled in conjunction with the operation of the electromagnetic proportional valve (MV3), and the amount of gas corresponding to the set hot water temperature is supplied to the main burner 09). While hot water supply is stopped, Baybanu pipe trunk 01 connects hot water supply pipe 2 from heat exchanger 07) to heat exchanger (1).
This is to connect the thin main pipe (4) to 7) via a chatki valve (VJ) to form a circulation path, and this circulation path is used to prevent after-boiling and to prevent freezing.

Note that ω is a fan for forced air supply, (S2) is a wind pressure switch, G is a pilot burner, (V7) is a drain valve, sail is a combustion chamber, and Q is a cylinder.

Therefore, the water flow correction setting 1) ii; ii.
・Prepared for the force °Scavana CJ5), electromagnetic proportional valve (Nν
%), hot water supply at the desired set temperature can always be obtained by controlling the gas set in accordance with the set temperature for hot water supply.

This is done to ensure that the maximum capacity limit of the appliance is not exceeded during the winter months when the supply water temperature is lowest due to the fixed positioning.

Effects of the Invention As explained above, this invention has a governor function using a fixed valve body Cθ and a valve body ■, and a water temperature correction function using a governor spring (1) using a heat-sensitive member. Because I was in danger of having
By using a shape memory alloy, etc. set in a practical temperature range that is proportional to the governor spring (1) made of a heat-sensitive member, it is possible to obtain an accurate proportional correction function for changes in water temperature, thereby improving the governor function for changes in water pressure. In combination with
You can get hot water at the desired temperature. In addition, the structure is simpler than the conventional one, which has a special water temperature correction structure consisting of a water temperature sensor filled with thermowax and a regulating valve, etc., resulting in smaller size and cost reduction of the S appliance. Since there are no obstacles in the water supply route, there is no pressure loss and there is no passage resistance.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views showing an embodiment of the constant flow sensitive valve with water temperature correction according to the present invention in an operating state, Figure 3 is a graph showing the spring characteristics of the governor spring, and Figure 1I. is a schematic configuration diagram of an application example, FIGS. 5 and 5 are sectional views of a conventional example, and FIG.
2. l... Movable valve body, (1)... Governor 4 Patent applicant Valoma Kogyo Co., Ltd. Figure 1 Figure 2 Figure 3 LL Club ■2

Claims (1)

[Claims] In a constant flow valve in which a movable valve body (V_2) is biased in a direction away from a fixed valve body (V_1) by a governor spring (1) and arranged in an overlapping manner, the governor spring (1) is biased in response to changes in water temperature. A constant flow valve with water temperature correction, characterized in that it is made of a heat-sensitive member whose spring constant changes.