MXPA97008254A - A mixing valve for thermostat key - Google Patents

Abstract

The present invention relates to a mixing valve for thermostatic valve having a mechanical mixing valve having a first cold water supply conduit, a hot water supply conduit, and a mixed water outlet conduit, a thermostatic regulator which has a sensor element in the mixing water outlet conduit and a control valve operably connected to the sensor, wherein the improvement is characterized in that: the control valve is only located in the first cold water supply conduit in an upstream housing of the mechanical mixing valve such that the thermostatic regulator modifies only the flow of fresh water leaving the housing that was provided to the mechanical mixing valve when the temperature of the mixed water descends from the current of the mechanical mixer becomes greater or less than a value determined as perceived by the sensing element, the supply conduit Hot water is connected directly to a mechanical mixer parallel to the cold water supply line and is derived from the control valve in the housing.

Description

A MIXING VALVE FOR THERMOSTATIC KEY.

TECHNICAL FIELD OF THE INVENTION The field of this invention relates to thermostatic mixing devices and more particularly to a mixing valve for thermostatic tap.

BACKGROUND OF THE INVENTION Many wrenches have devices that COJI control the flow temperature of the total mixed production of hot and cold water supplies. One reason for thermostatic control is to eliminate constant valve readjustments when the temperature of the hot water supply fluctuates. The temperature of the hot water supply can vary substantially. The initial temperature of the hot water supply inside the supply ducts can be cooled after long periods of inactivity.

REF: 25636 vidad of the key particularly if the hot water tank is away from the key and the main duct from the hot water tank to the key is long. In addition, if the heater that heats the water has been charged to its capacity and can not be maintained and the tank runs out of hot water, the hot water supply may sub-mediate to cool down over a relatively short period of time. . The most known thermostatic faucet mixing valves work by exchanging the flow rates of both cold and hot water simultaneously in opposite directions in such a manner as to maintain the temperature of the mixing outlet water approximately constant within certain limits. The impetus to simultaneously provide flow rates that are lowered and increased from the hot and cold water sumipijs respectively and vice versa is to provide a nearly constant flow velocity during thermostatic adjustment. Many of these types of thermostatic mixing valves use the thermostatic element to relatively determine a restricted range of temperature assigned to the mixing outlet water and incorporate the thermostatic device into the mixing control. Adjusting the temperature of the outlet fj jo is one of the a-justes of the specialized mixing mechanism that incorporates the thermostatic element. The total flow rate then needs to be controlled by another mechanism. The inclusion of two separate mechanisms, one to control the total flow rate and the other to control the mixture that incorporates the thermostatic element, a-grega unnecessary costs and complexity to the thermostatic wrenches that reduce their commercial convenience. Another disadvantage of these known thermostatic devices becomes apparent when the hot water supply is received from a heater that heats the water instantly. The instant instant water heaters tie There is a safety device that interrupts the heating in case the flow of water that runs through them becomes less than a certain predetermined limit. The known thermostatic control devices are capable of adjusting the flow rate of the hot water supply below this limit, in such a way as to cause the water heater to be isolated.

A known thermostatic device was published in German Patent 2, 917, 233, includes a thermostatic regulator that reduces the flow of hot water supply when the temperature of the mixed water outlet exceeds a set value. In this case, due to the action of the thermostatic regulator, the flow of the supply of hot and cold water was not controlled sultanically and oppositely. In contrast, while the flow of hot water supply is manageably tight, the flow of hot water remains relatively constant. However, when the hot water was supplied from an instant water heater, the same disadvantage mentioned above occurs. What was needed is a tematic device that allows a mixing valve to be, to operate in both, the flow rate and the mixing mode while a thermostatic control is continuously provided. In addition, a thermostatic device that does not cause deactivation of a water heater was required. to regulate tatic thermos in water supplies such that the mixing valve for hot water tap is compatible with instant water heaters BRIEF DESCRIPTION OF THE INVENTION According to one aspect of the invention, a thermostatic wrench has a mechanical mixing valve having a first cold water supply pipe, a hot water supply pipe, and a water outlet pipe. mixed The key includes a thermostatic regulator that has a sensor element installed in the mixed water outlet and an operable control valve connected to the sensor. The control valve was built to modify only the flow of the cold water supply when the temperature of the mixed water tends to be higher than a set value. Preferably, the control valve was installed directly into the first cold water supply conduit such that the thermostatic regulator only restricts the flow of cold water that was provided to the mechanical mixing valve when the temperature of the mixed water becomes less than one. value established as per the sensing element. The flow of hot water extracted remains constant and only depends on the regulation of the total flow and mixing ratio, as predetermined by the user as established with the individual maneuver mixer. Only the flow of extracted cold water varies in such a way as to maintain the temperature of the water mixed within certain pre-established limits. Poj: that the regulation executed by the operator is compatible with the operation of the heaters that heat the water instantly, the thermostatic regulation of the key valve does not disturb the operation of the ! 5 instant water heater. In one embodiment, the control valve has a full opening position which is provided for the entire flow through the cold water conduit with the sensing element that was built and connected to the control valve such that the control valve restricts flow through the cold water conduit when the temperature in the mixed water is below the set value. In one embodiment, the control valve was constructed to completely close a first cold water supply conduit at a great distance. A second cold water supply conduit is in parallel with the first cold water supply mentioned above which continuously supplies a restricted flow of cold water directly to the individual maneuvering mixing valve. In another embodiment, the control valve was constructed to provide a continuously restrained flow of cold water and not to completely shut off the flow of cold water to the mechanical mixer in the absence of the action of the sensor element. The control valve has at least one restricted area passage that continuously allows the restricted flow velocity of the cold water through the control valve and a. the mechanical mixing valve. It is also convenient that the thermostatic regulator has a manual control to allow manual modifications of the set temperature that the control valve restricts the flow through the first cold water conduit. In this way, a thermostatic valve is compatible with both the heaters that heat the water instantly and with the conventional mechanical mixing valves to provide the benefits of both manual assemblies of the mixed output water and provide thermostatic control of the mixed water. of exit.

BRIEF DESCRIPTION OF THE DRAWINGS Reference is now made to the accompanying drawings in which: Figure 1 is a basic schematic view of an embodiment according to the invention. Figure 2 is a latitudinal segmented view of a thermostatic key device shown in Figure 1. Figure 3 is a basic schematic view of a modified embodiment; and Figure 4 is a sectional view of a modified thermostatic valve device using the scheme shown in Figure 3.

DETAILED DESCRIPTION OF THE INVENTION Referring now to FIG. 1 a thermostatic valve 10 includes a simple handling mixing valve 12 operably connected to a cold water supply inlet 14 and to a hot water supply pipe 16. The mechanical mixer can be of any commercially available conventional mixing valve. Preferably, it is a simple handling mixing cartridge with a simple control lever 17 and which may have elements of ceramic elements as shown in Figure 5 and described below. The water supply inlet 16 is connected directly to the mixing valve 12. Hot water can come from any source such as an electric or gas instant water heater. The inlet 14 of the cold water supply was connected to a first cold water conduit 18 which contains a thermostatically controlled valve 20. A second cold water supply line 22 is parallel to the line 18 and to the passage tubes of the control valve 20. A flow limiter 21 was located within the line 22. Naturally, the two lines 18 and 22 supply can be reincorporated countercurrent and derive water from a common source. The mixing valve 12 has its outlet 24 of mixed water connected to the conduit 26. A thermostatic regulator 30 has a temperature sensor 32 installed in a chamber 34 of the mixed water conduit 26. The sensor 32 may have a commercially available wax dilation bulb of the well-known type. A driving rod 36 was connected to the sensor 32 and the outputs of the chamber 34 in a well known manner that is suitably sealed against water filtration. The sensor 32 operates the rod 36 as a function of the perceived temperature of the mixed water within the chamber 34. The driving rod 36 was connected to the control valve 20 which was housed in a chamber 38 in line with the conduit 18. The valve 20 cooperates with a corresponding site 40 interposed between the chamber 14 and the pipe 42 that connects to the inlet 14. As shown in figure 3, the valve -20 is a slide valve with sites 44 that are contiguous with the walls of the chamber 38 38 and flow openings 46 that pass through the central portion of the valve. The valve 20 cooperates with a site 40 in such a way that the flow is completely closed when the valve is in the closed position. The thermostatic sensor 32 can be installed in a slide 48 arranged to slide within the chamber 34. The position of the slide 48 can be controlled by a control screw 50. The control screw 50 regulates and modifies the action of the regulator 10. thermostatic and in particular, one can limit the maximum temperature that is obtained under normal operating conditions. The regulator 30 may incorporate a safety device provided with spring 51 that was attached to the sliding valve 20 for the purpose of preventing excessive overloads from which is adapted to the sensor element 32 under certain conditions. The purpose is also well known with respect to thermostatic regulators. A recessing stem 49 was located within chamber 38 to assist valve 20 to its closed position. The operation of the mixing valve 12 is conventionally conducted via a control lever 17. The temperature and the flow rate were selected by positioning the control lever to a particular position. The demand for hot water was selected by the placement of the mixing valve 12. The hot water flow however was restricted because the valve 20 was closed. The obstruction 21 also restricts the supply of available cold water to the mixing valve 17. Line 22 of passage tube for the supply of cold water is necessary if the user wants to extract only cold water. As the hot water supply is extracted from line 16 which initially can only be at room temperature or warm, the water is extracted from a heater that heats the water instantly (not shown) and the water that passes to the mixing valve 12 for the key of the line 16 that becomes calejidade completely. The temperature of the mixed water that runs through the chamber 34 increases. The temperature of the sensor 32 is also raised in such a way that once a threshold of a certain temperature crossed, the sensor causes the valve 20 to open with respect to the site 40 and allow to increase the availability of the cold water to the mixing valve 12. Consequently, the increased availability of cold water allows more cold water to pass through valve 12 and into conduit 24 and chamber 34. An equilibrium condition was reached and the temperature and flow velocity of the mixed water were set by the user with the mixing valve 12. The thermostatic regulator allows the operator to preset the mixing valve at the desired temperature on the initial operation of the key. The wrench provides that the entire flow of hot water supply is initially extracted while a single restricted flow of cold water is mixed with the hot water supply. When the hot water is currently above, the thermostatic regulator allows for an increased flow of cold water, which is an obvious indication that the normal equilibrium flow conditions have been met. The thermostatic regulator eliminates the previous inconvenient habit of the user opening the tap of the hot water supply every time he uses the key, and then wait for the temperature to increase, and then adjust the temperature of the mixture. after the warm water supply has reached the normal heating temperatures. If during the flow of water through the mixing valve 12 and the thermostatic regulator 10, the supply conditions change such as a reduction of the hot water, a decrease in the temperature of the running water, or a temporary unexpected fall of the pressure cold water inlet, the thermostat regulator 30 immediately corrects the opening in the valve so as to modify the flow of cold water available for the mixing valve 12 and maintain the temperature of the mixed water excreted within the constant flow rate exchanger 34 within the limits of the sensitivity of the sensor. The compensation of the pressure drop in the cold water supply is important because it is most commonly the supply of cold water that is exposed to these variations due to the operation of direct hopper arrangement valves, dishwashers, and washing machines. A second embodiment of the key 10 of the roost is shown in FIGS. 3 and 4. The same or similar parts are numbered in the same way as the corresponding parts of the first embodiment and are now not described. In this embodiment, the cold water inlet 14 was supplied only by the conduit 42 which is carried from the regulator and the valve 20. The valve 20 has openings 52 with transverse cross-sections limited to provide nevertheless a continuous restricted supply of cold water. In this way, the mixing valve 12 has a continuous supply of cold water available through the parallel openings 52 although the valve 20 may be in the closed or positioned position by the sensor 32. Again, this supply of fresh water is necessary if the user ecea extract solt the water would go. Alternatively, instead of the openings 52, the valve 20 could have drums that are slightly open from their locations 40. Again the construction that is obtained from the same continuous and restricted cold water supply is to dimension and fix the valve 20 and the sensor 32 such that the valve 20 will always be kept slightly spaced from the sites 40. The operation of the second mode is the same as for the first mode except for the fact that the restricted but continuous availability of the fresh water is a through the apertures 19 preferably to seal the aperture 21. In the illustrations, the tet_ regulator 30 is shown in a separate housing that separates from the mixing valve 12; However, it is possible for the mixing valve 12 and the regulator 30 to be completely or partially integrated with each other. The mechanical mixer 12 can be in the form of a cartridge and the thermostatic regulator can also be made in the form of a cartridge and the two respective cartridges can be stored in a single key body. The mechanical mixer can be a ball valve or a type of ceramic disk of any kind. Referring now to Figure 5, a type of dish is shown to cooperate conventionally with the thermostatic regulator 30. A mixing plate 60 is installed within the body of the key and a movable plate 62 is moved via a connection operable with the control lever 17. The mixing dish has two openings 64 and 66 which lead to the inlets 14 and 16 the hot water and cold water surni. The movable plate 62 has an opening 68 which corresponds to the openings 64 and 66. In Figure 5 the opening 68 is shown as a peripheral cut. The translational and rotational movement of the movable plate exposes the openings 64 and 66 in total quantity and different proportions in such a way as to control both the flow rate and the mixing propojrtion between the hot and cold water. The commercially known progressive keys only with rotation can they also control the volume and mixing ratio. The plates 60 and 62 also have respective openings 70 and 72 leading to the regulator 30. The opening 62 in the moving platen is adjusted and arranged to obstruct the opening 70 when the mechanical mixer is in the out-of-position position. site or also when the mixing valve is in the cold water position only. The control device includes the ports 70 and 72 in such a way that it separates the regulator 30 from the supply network when the action of this is not required. The cold water can then exit the body of the key via an opening that is separated with a pressure brake valve to an outlet of the discharge tube whereby the regulating sensor 32 is derived.

Modifications and variations are possible beyond the deviation of the scope and spirit of the present invention as defined by the appended claims.

It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates.

Having described the invention as above, property is claimed as contained in the following:

Claims (8)

R E I V I N D I C A C I O N S

1. A mixing valve for a thermostatic valve having a mechanical mixing valve having a first cold water supply conduit, a hot water supply conduit, and a mixed water outlet conduit; a thermostatic regulator having a sensor element in the mixing water outlet conduit and a control valve operably connected to the sensor; wherein the improvement is characterized because: the control valve is only located in the first cold water supply conduit in a housing upstream of the mechanical mixing valve such that the thermostatic regulator modifies only the fresh water flow leaving the housing that was provided to the mechanical mixing valve when the temperature of the mixed water coming from the stream of the mechanical mixer becomes greater or less than a determined value as perceived by the sensor element; the hot water supply line is connected directly to a mechanical mixer parallel to the cold water supply line and is derived from the control valve in the housing.

2. A mixing valve for a wrench: most as defined in claim 1, characterized in that; the control valve having a full opening position is provided for the flow of complete water through the cold water conduit; the sensor element was constructed and connected to the control valve such that the control valve restricts the flow through the fresh water conduit when the temperature of the mixed water is below the set value,

3. A mixing valve for thermostatic valve as defined in rei indication 2, further characterized in that; the control valve that was constructed to completely close off the first cold water supply conduit. a second water supply conduit Cold is in parallel with the first cold water supply that supplies a restricted flow of cold water directly to the marble mixing valve.

4. A mixing valve for thermostatic tap as defined in claim 2, further characterized in that; The control valve was constructed to provide a continuous restricted flow of cold water and not completely isolate the flow of cold water to the mechanical mixer in the absence of action by the sensor element.

5. A mixing valve for a key is the same as defined in claim 4, further characterized in that; the control valve has at least one restricted area passage allowing the continuous restricted flow velocity of the cold water through the control valve and a. the mechanical valve.

6. A mixing valve for thermostatic valve as defined in claim 5, further characterized in that; the thermostatic regulator has a manual control to allow a manual modification of the predetermined temperature of that control valve which restricts the flow through the first cold water conduit.

7. A mixing valve for thermostatic valve as defined in claim 1, further characterized in that; The thermostatic regulator is in a housing that separates from the mechanical mixer.

8. A mixing valve for a thermatical tap as defined in claim 1, further characterized in that; the set value that is substantially above the temperature of the cold water supply such that the mixing valve can operate to manually control the temperature of the mixture of cold and hot water supplies so that the mixed water is below the established value.