Controllable throttling device

 

(57) Abstract:

Usage: refrigeration and can be used to regulate the degree of filling of the evaporator with the refrigerant. The inventive controllable throttling device consists of a sealed cylindrical housing with mechanical input and output channels, and also accommodated in the housing movable ferromagnetic regulatory body, the stroke limiter in the form of a fixed orifice plates installed in the entrance channel, sectional electromagnetic coil covering the housing, a temperature sensor and a control device. The movable body in the form of ferromagnetic bullet with a through axial channel, a stabilizer at the tail end, a nose portion which is made in the form of a truncated cone, paired with the surface of the fixed washer input channel, while the ferromagnetic slug spring-loaded, and the control signal from the control unit to the sectional electromagnetic coil. 1 C.p. f-crystals, 2 Il.

The invention relates to refrigeration and can be used to regulate the degree of filling of the evaporator with refrigerant.

Known regulator microemulator does not have sufficient reliability due to possible freezing of moisture in the exhaust holes regulating needle.

The prototype is controlled throttling device (OUD), containing a cylindrical housing with input and output channels with protective washers and the control coil, the space between which floats capsule with elastic shell and ferromagnetic bullets, between which is antifreeze. As forming the shell under the action of the coil cross-section of the throttle is changed.

The presence of an elastic membrane (Teflon FT-4 or from a material based on rubber) leads to a significant reduction of the service life. Due to repeated deflections of the elastic membrane may cause cracks, leaks leads to loss of coolant, and hence the operability of the throttling device.

The purpose of the invention is to enhance reliability. This objective is achieved in that in a controlled throttling device containing a sealed enclosure with mechanical input and output channels, and also accommodated in the housing movable ferromagnetic regulatory body, the restrictor in the form of a fixed orifice plates installed in the entrance channel, sectional electromagnetic coil covering the housing, the sensor temperature is m, the stabilizer at the tail and nose are made in the form of a truncated cone, paired with surface fixed throttle washer input channel.

Another difference is that the ferromagnetic spring-loaded bullet.

These constructional features not described in the known sources of scientific, technical and patent information, and the proposed solution meets the criterion of "significant differences".

In Fig. 1 shows the device in a state minimum cooling power; Fig.2 diagram of the control device.

The device shown in Fig.1, consists of a sealed cylindrical housing 1 with mechanical input and output channels 2, the stroke limiter in the form of a throttle washers 3 and 4, sectional electromagnetic coil 5, covers the body, the ferromagnetic bullet 6 with a through axial channel, the tail part which contains the stabilizer 7 and the nose in the form of a truncated cone is associated with a fixed throttling washer input channel 2, a sensor 8 temperature (Fig.2), the control device 9. In addition, in the case of de-energizing the electromagnetic sectional coil ferromagnetic bullet in tori no current in the coil, the refrigerant flows through the throttle device 3, ferromagnetic slug 6 is not included in the throttle washer, which corresponds to the maximum opening of the throttle, i.e., the maximum flow rate of the refrigerant. When reducing the heat load of the refrigeration unit the signal from the temperature sensor 8 is supplied to the control device 9 and the winding of the electromagnetic coil is fed a certain tension, which uses well-known regularization scheme.

The magnetic forces of the bullet is drawn partially into the gap of the orifice plates 3, its position is determined by the equality of forces of the magnetic field and the flow resistance of the refrigerant. In this case, one part of the refrigerant is throttled in the gap between the movable slug 6 and the fixed throttle washer 3, and the other in the axial channel of the bullet.

In the case of reducing the cooling capacity to the minimum level to the coil is automatically given this tension, in which the ferromagnetic slug 6 completely covers throttling washer 3. In this case, the refrigerating agent is choked in the axial channel. The selection voltage is regulating device 9 on the basis of the signal from the temperature sensor 8.

Device with spring-loaded bullet works as follows.

HT coolant is expanded in the axial channel. When voltage is applied from the control unit of the magnetic forces pull the ferromagnetic bullet from throttling washer, increasing the flow rate of the refrigerant.

To prevent full of ice formation on the surface and in the axial channel 6 bullets or disturbing thermal regime on the section of the coil 5 is supplied with high-voltage pulse. Coil jerks around along the stream and back, resulting in the destruction of the crust of ice, and a sharp increase in the consumption of the agent leads to defrost the remaining pieces of ice on the inner surface of orifice plates in the axial channel of the mobile bullets 6.

Feasibility and economic effect of the use of the invention in a simplified maintenance, simple design, no elastic membrane subjected to repeated deformation and the increase in the duration of uptime.

1. CONTROLLABLE THROTTLING DEVICE containing a sealed cylindrical housing with end input and output channels, and also accommodated in the housing movable ferromagnetic regulatory body, the restrictor in the form of a fixed orifice plates installed in the entrance channel, sectional electr to improve reliability, the movable body in the form of ferromagnetic bullet with a through axial channel, a stabilizer at the tail and nose are made in the form of a truncated cone, paired with the surface of the fixed orifice plates of the input channel.

2. The device under item 1, characterized in that the ferromagnetic spring-loaded bullet.

 

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