The method of obtaining a given temperature characteristics of the regulatory elements, working in temperature, and regulating element, operating in dependence on temperature

 

(57) Abstract:

The invention relates to a method for producing a given temperature characteristics operating in dependence on the temperature regulating valve elements and thermostats, as well as for the regulatory element, thermostats and valves operating in dependence on temperature. Such regulatory elements can work from the pressure in the pressure chamber with the gas-liquid mixture. To achieve the required thermal performance in some cases it is necessary to use a mixture of toxic or environmentally harmful substances. The technical result of the invention consists in the use of non-toxic and environmentally safe substances, for which a high pressure chamber filled non-azeotrope blends a mixture consisting of at least two components. The mixing ratio is selected depending on the desired temperature characteristics. 2 C. and 15 C.p. f-crystals, 5 Il.

The present invention relates to a method for producing a given temperature characteristics operating in dependence on the temperature regulating valve elements and thermostats, as well as regulatory elements operating in dependence on the temperature.

is nnow partially liquid and partially with gas, moreover, the gas-filled part of the chamber at least partially contains the gaseous phase of the fluid. When the temperature changes acting on the camera, changing the temperature of its liquid content and, consequently, the pressure in the chamber. The pressure change can be determined either by measurements or can be used directly to actuate the actuator, for example, for a displacement of the membrane. If the liquid is a pure substance, the temperature characteristic of the regulatory element can be predicted relatively easily, as for pure substances there is a simple relationship between pressure and temperature. This dependence can be represented graphically as a curve. The braking element in the form of a temperature transducer in the desired output signal, for example, presented in the form of movement or actuation of the electrical switch has exactly the same simple dependence of the temperature, so that this dependence can be easily predicted in advance.

However, in most cases, the use of these pure substances is undesirable because of their toxicity and environmental Seth, but as soon as the injury occurs, creates a serious threat to human health and the environment. This will also have significant difficulties with the removal of these elements, because they are filled they are often referred to as "special waste"category.

Known use in the chamber of the pressure regulator non-azeotrope blends the mixture as a heat-sensitive environment. For example, in US 3435682 described a method of obtaining a given temperature characteristics operating in dependence on the temperature regulating valve elements or thermostats equipped with actuating element which acts on the pressure in the pressure chamber includes flow into the chamber pressure non-azeotrope blends a mixture of at least two substances.

However, in the known way, the composition of the non-azeotrope blends mixtures picked under a certain boiling point, which allows you to adjust only at one given temperature, and regulating element is completely filled with liquid, use only a mixture of water and alcohols or glycols, and in the working substance of the camera is dispersed solid initiating substance.

The objective of the invention is to achieve continuous the automatic harmless substances and without the use of initiator substances.

This task is solved in that in the method of adjustment of temperature characteristics operating in dependence on the temperature regulating valve elements or thermostats equipped with actuating element which acts on the pressure in the pressure chamber including a supply of non-azeotrope blends a mixture of at least two substances having the curve of boiling points and curve points of condensation, which are not the same between these curves there is an undefined state in which a part of the mixture is gaseous and the liquid portion of the mixture, the desired temperature characteristic form in the area between the curve of boiling points and curve points-condensing non-azeotrope blends mixtures by varying the ratio of its components, and this plot change by changing the ratio of its components to obtain the desired temperature characteristics.

The mixing ratio can be changed as long until the temperature characteristics.

The mixing ratio can be selected individually for each regulatory element.

In the mix, you can add another substance, practically insoluble in it and saving is a nitrogen, helium or carbon dioxide.

Known regulatory element, a pressure chamber which used non-azeotrope blends the mixture as a heat-sensitive environment. For example, in US 3435682 described regulatory elements operating in dependence on temperature, valves or thermostats equipped with actuating element under pressure in a pressure chamber containing a non-azeotrope blends a mixture of at least two substances.

However, the known regulatory element is instantaneous, allowing to adjust only at one given temperature, and the composition of the non-azeotrope blends mixtures picked under a certain boiling point, the regulatory element is completely filled with liquid, use only a mixture of water and alcohols or glycols, and in the working substance of the camera is dispersed solid initiating substance.

The invention is also the element that allows for continuous adjustment in the specified temperature range, using a wide range of substances and without the use of initiator substances.

This task is solved in that the control element operating in sevicemen pressure in the pressure chamber, containing non-azeotrope blends a mixture of at least two substances, which is not coincident curves boiling points and points of condensation, and between these curves there is an undefined state in which a part of the mixture is gaseous and the liquid portion of the mixture, temperature characteristics is formed on the area between the curve of boiling points and curve points-condensing non-azeotrope blends the mixture, and this plot change by changing the ratio of its components to obtain the desired temperature characteristics.

Non-azeotrope blends the mixture can consist of substances related to environmentally friendly groups of chemical compounds.

Non-azeotrope blends the mixture may consist of halogenated compounds.

Non-azeotrope blends the mixture may consist of halogen - carbon compounds or halogen-hydrogen-carbon-containing compounds.

Non-azeotrope blends the mixture may consist of fluorine-carbon-containing compounds or fluorine-oxygen-carbon-containing compounds.

Non-azeotrope blends the mixture may consist of chlorine-carbon-containing compounds or chlorine-oxygen-carbon-containing compounds.

Non-azeotrope blends the mixture may consist of non-azeotrope blends the mixture may consist of hydrocarbons.

Non-azeotrope blends the mixture may consist of hydrogen-oxygen-carbon compounds.

Non-azeotrope blends the mixture may consist of aliphatic hydrocarbons.

Non-azeotrope blends the mixture can consist of substances selected from the group comprising the following substances: R22, R23, R123, R123a, R124, R125, R134, R134a, R141b, R142b, R143a, R152a, methane, ethane, propane, butane, isobutane, ethylene, propylen, propylene, dimethylether.

Non-azeotrope blends the mixture can consist of substances R22 and R152a.

Thus, there is no need to use pure substance, which, as noted above, in many cases is toxic or environmentally harmful. The present invention allows the use is not environmentally harmful and toxic substances. When the desired temperature characteristic receive, firstly, by using not one but several substances and, secondly, by selecting a specific ratio of these substances in the mixture. In most cases you will not need any mechanical modifications of the regulatory elements. By an appropriate selection of substances and the ratio of these substances in a mixture can be obtained to the desired temperature characteristic of the regulatory element. However, it should be noted, the population, as a rule, is not a simple relationship, which is obtained theoretically. For non-azeotrope blends blends pressure is a pure function of temperature, ratio of components and the density of the substance. Usually the curve point boiling of multicomponent mixtures differ from their curve condensation point. Between these two curves on the graph of dependence of pressure on temperature there is a section where a portion of the liquid is passed in the gaseous phase, and the other part is still in the liquid phase. On this site is the resulting curve of the dependence of pressure on temperature. It can be determined theoretically, but it is very difficult. In accordance with the present invention it is not necessary to measure the pressure. On the contrary, the phenomena caused by the temperature change, is directly used to determine the necessary temperature characteristic or not. Thus, it is possible with a given degree of accuracy to obtain a simple dependence of the signal regulatory element from the temperature, for example, the distance that moved the braking element temperature, although the dependence of pressure on temperature is not easy. In the case of a non-azeotrope blends a mixture of gaseous phase may is icene in the selection of certain components are missing. However, the ratio of the components itself can be set quite accurately, because the chamber pressure to impose certain amount of a substance without regard to whether the substance is in the liquid or in the gas phase.

It is preferable to change the mixing ratio until then, until the temperature characteristics.

It is most expedient to individually select the ratio of the components for each regulatory element. This allows you to compensate for mechanical inaccuracies made, for example, in the process of its manufacture.

In the mixture, it is advisable to add another substance which is not soluble in it and remains gaseous in the desired temperature range. The addition of such substances allows to increase the pressure of the gas phase, which leads to the displacement of the regulating element. This results in a shift of the output signal of the regulating element, such as movement, without significant changes function to convert the pressure signal. In this feature, you simply enter additional member.

Gaseous substance preferably is a nitrogen, helium or D. CLASS="ptx2">

The task is solved in that in the running depending on the temperature regulating element valves or thermostats, in which the actuating element is mounted for exposure to the pressure of the pressure chamber, the pressure chamber contains a non-azeotrope blends a mixture of at least two substances partly in liquid and partly in the form of gas.

Thus, the contents of the pressure chamber is not limited to a single pure substance. On the contrary, as mentioned above, the present invention provides the use of a mixture of at least two substances, and temperature characteristics are determined mainly by the ratio of the components of this mixture, which is at least two. This can be used non-toxic environmentally harmless substances that avoids the problems associated with the subsequent removal of regulatory elements. The selection of the ratio of the components of the mixture allows to set the desired degree of dependence of the output signal of the regulating element temperature. It is possible to obtain heat-dependent curves of the output signal, which cannot be obtained when using pure substances. In the ryh is achieved azeotrope.

Non-azeotrope blends the mixture preferably consists of substances environmentally friendly groups of chemical compounds that can dramatically reduce the level of damage inflicted on the environment.

Can be preferably used the following connections:

- halogenated compounds

- halogen-carbon compounds or halogen-hydrogen-carbon compounds,

- fluorine-carbon compounds or fluorine-oxygen-carbon compounds,

- chlorine-carbon compounds or chlorine-oxygen-carbon compounds,

- hydrocarbons,

- hydrogen-oxygen-carbon compounds

- aliphatic hydrocarbons,

- the substance is selected from the group including R22, R23, R32, R123, R123a, R124, R125, R134, R134a, R141b, R142b, R143a, R152a, methane, ethane, propane, butane, isobutane, ethylene, propylen, propylene, dimethylether,

- substances R22 and R152a,

- any combination of the above substances.

The following describes preferred embodiments of the present invention with reference to the accompanying drawings, where:

Fig. 1 depicts the valve actuating element is controlled depending on the temperature,

Fig. 2 - thermostatic off the pressure and temperature for a pure substance

Fig. 4 is a graph of the dependence of pressure on temperature and ratio of components for non-azeotrope blends mixtures and

Fig. 5 is a plot of the pressure on the ratio of components of the mixture at different temperatures.

As is shown in Fig. 1, the valve 1 is controlled depending on the temperature, includes a housing 2 with an inlet 3 and outlet 4, which are connected to each other by channel 5. In the channel 5 installed valve seat 6, which can fit snugly closing element 7. Element 7 is held by the spring 8 in the closed position and moves the diaphragm 9 in the direction from the valve seat 6. The spring 8 is pressed against the support disk 10, the position of which can be changed by means of an adjusting screw 11, thereby providing the ability to adjust the bias of the spring 8 and, consequently, the main valve installation 1. On the side remote from the closing element 7, the membrane 9 is connected by a tubular connection 12, made for example in the form of a capillary tube, a temperature sensor 13 or, more precisely, to his chamber 14 of the pressure. The chamber 14 of the pressure is partially filled with a liquid 15 and partially gas 16. When the temperature around the sensor 13 varies the pressure in the Cam element 7, the pressure creates a force acting on the membrane 9. Depending on the magnitude of this force the diaphragm 9 moves the closing element 7, overcoming the force of spring 8, a distance from the valve seat 6. Thus, set the degree of opening of the valve depending on the temperature.

In Fig. 2 depicts thermostatic switch 20, provided with a sensor 21, the temperature with the chamber 22 of pressure, which is partially filled with liquid 23 and partially gas 24. The pressure in the chamber 22 acts on the end surface of the bellows 26, on the other side of which is secured the plunger 27. The plunger 27 when a predetermined temperature is maintained in equilibrium by means of two springs 28, 29.

The plunger 27 has two shoulder 30, 31, between which the operating lever 32 of the switch 33 having two normally open contact 34, 35 and one normally closed contact 36. In the neutral position of the pusher 27 normally closed contact 36 is not in contact with either one of the two normally open contacts 34, 35. However, if the pressure in the chamber 22 is increased, the plunger 27 is moved upward end surface of the bellows 26. The operating lever 32 is pressed upward by the lower shoulder 30, as the pressure in the chamber 22 falls, the plunger 27 is moved in the opposite direction and normally closed contact 36 is connected with the other normally open contact 35.

Valves and thermostats of this type are known. In such camera devices 14, 22 pressure filled with a pure substance, and the dependence of pressure on temperature is represented in Fig. 3. As can be seen from Fig. 3, for each temperature T, there is only one value of pressure P and Vice versa. From this it can relatively accurately calculate and predict thermal behavior of the regulatory element. However, as noted above, a disadvantage of using pure substances is their toxicity and threat to the environment.

In accordance with the present invention, instead of the pure substance chamber 14, 22 pressure fill with a mixture of at least two substances. Besides, the dependence of pressure and temperature is more complex. The pressure depends not only on temperature but also on the ratio of components in the mixture, as well as the density of a substance. In Fig. 4 shows a plot of the pressure of the mixture of the two substances, where the pressure is plotted for the up temperature to the right and back, and the ratio of the components and KAC2. However, these curves are curves for pure substances, since they correspond to the ratio of the components 1 : 0 and 0 : 1.

Almost all the components ratio between these two limit values have the peculiarity that the curve of the boiling point curve and condensation point do not coincide. The curve of the boiling point curve is represented BLA, and curve condensation point is represented by the curve AVWB. When the pressure curve above the boiling point there is a complete transition in the liquid phase, at a pressure below the curve condensation point the transition occurs in the gaseous phase. Between these two curves there is an undefined state, that is, the portion of the mixture is in the gaseous phase, and a portion of the mixture in the liquid phase. Therefore, it is difficult to predict the gas pressure in the chamber 14, 22 pressure. As the curve boiling point and curve condensation point strongly depend on the ratio of components as shown in the graph of Fig.5 for different temperatures T1-T5 adopted permanent, with T1>T2>T3>T4>T5. In principle in Fig. 5 shows different curves, each of which corresponds to a constant temperature in the plane of the P-M in Fig. 4, for example, the curves bounding the region UM-KNU and LLAVWB in Fig. 4. Of course, both examples is to install the necessary temperature characteristic by varying the ratio of components of the mixture. It is possible to obtain the dependence of pressure on temperature, for example, in the form of a curve NWSFM in Fig.4. It is obvious that by varying the ratio of components, you can modify the function of the dependence of pressure on temperature. The peak values for the various curves of this type are plotted on the line C1SC2. Of course, when using specific components of the change in the temperature characteristics is possible only in a limited range. However, practically there are no restrictions on the choice of the substances in the mixture. The ratio of the components can also be changed in the process of filling the chamber 14, 22 pressure, to obtain the temperature characteristic corresponding to this device.

As mixture components fit all environmentally friendly group of chemical compounds. In particular, there can be used halogenated compounds, for example, halogen-oxygen-carbon-containing compounds such as fluorine-carbon-fluorine-oxygen-carbon-, chlorine-carbon - or chlorine-oxygen-carbon compounds. Preference is also given to chlorine-fluorine - carbon - or chlorine-fluorine-oxygen-carbon-containing compounds and hydrocarbons. Can also premanath substances: R22, R23, R32, R123, R123a, R124, R125, R134, R134a, R141b, R142b, R143a, R152a, methane, ethane, propane, butane, isobutane, ethylene, propylen, propylene, dimethylether. Especially preferred is a mixture of substances R22 and R152a. In principle, the selection of the ratio of the components of the mixture can be carried out arbitrarily to obtain the desired temperature characteristics, this mainly can be used non-azeotrope blends the mixture. In the mixture, in addition, may be added to the gas, such as helium, nitrogen, or carbon dioxide, to offset curve in the direction of the axis P-axis pressure), without changing itself this curve.

1. The method of obtaining a given temperature characteristics operating in dependence on the temperature regulating valve elements or thermostats equipped with actuating element which acts on the pressure in the pressure chamber includes flow into the chamber pressure non-azeotrope blends a mixture of at least two substances having the curve of boiling points and curve points of condensation, which are not the same, and between which there is an uncertain state in which a part of the mixture is gaseous and the liquid portion of the mixture, characterized in that that the desired temperature characteristic form in the area is mponents and this site change by changing the ratio of its components to obtain the desired temperature characteristics.

2. The method according to p. 1, characterized in that the mixing ratio change until until the temperature characteristics.

3. The method according to p. 2, characterized in that the mixing ratio is adjusted individually for each regulatory element.

4. The method according to any of paragraphs.1 to 3, characterized in that the mixture add another substance, practically insoluble in it and preserving the gaseous phase in the desired temperature range.

5. The method according to p. 4, wherein the gaseous substance is nitrogen, helium, or carbon dioxide.

6. The regulatory element of the valves or thermostats, running depending on the temperature, provided the Executive element under pressure in a pressure chamber containing a non-azeotrope blends a mixture of at least two substances, which is not coincident curves points, boiling and condensation points, between which there is an uncertain state in which a part of the mixture is gaseous and the liquid portion of the mixture, characterized in that the temperature characteristics of the regulatory element is formed on the area between the wear of its components to obtain the desired temperature characteristics.

7. Item under item 6, characterized in that the non-azeotrope blends the mixture consists of substances related to environmentally friendly groups of chemical compounds.

8. Item under item 6 or 7, characterized in that the non-azeotrope blends the mixture consists of halogenated compounds.

9. Element according to any one of paragraphs.6 to 8, characterized in that the non-azeotrope blends the mixture consists of halogen-carbon compounds or halogen-hydrogen-carbon-containing compounds.

10. Element according to any one of paragraphs.6 to 9, characterized in that the non-azeotrope blends the mixture consists of fluorine-carbon-containing compounds or fluorine-oxygen-carbon-containing compounds.

11. Element according to any one of paragraphs.6 to 10, characterized in that the non-azeotrope blends the mixture consists of chlorine-carbon-containing compounds or chlorine-oxygen-carbon-containing compounds.

12. Element according to any one of paragraphs.6 to 11, characterized in that the non-azeotrope blends the mixture consists of chloro-fluoro-carbon-containing compounds or chlorine-fluorine-oxygen-carbon-containing compounds.

13. Element according to any one of paragraphs.6 to 12, characterized in that the non-azeotrope blends the mixture consists of hydrocarbons.

14. Element according to any one of paragraphs.6 to 13, characterized in that the non-azeotrope blends blended with the, is the non-azeotrope blends the mixture consists of aliphatic hydrocarbons.

16. Element according to any one of paragraphs.6 to 15, characterized in that the non-azeotrope blends the mixture consists of substances selected from the group comprising the following substances: R22, R23, R123, R123a, R124, R125, R134, R134a, R141b, R142b, R143a, R152a, methane, ethane, propane, butane, isobutane, ethylene, propylen, propylene, dimethylether.

17. Element according to any one of paragraphs.6 to 16, characterized in that the non-azeotrope blends the mixture consists of substances R22 and R152a.

 

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