CN214500200U

CN214500200U - Refrigeration solenoid valve with novel pre-filter

Info

Publication number: CN214500200U
Application number: CN202120782531.6U
Authority: CN
Inventors: 沈庆强; 赵子华
Original assignee: Linyi Ice And Snow Refrigeration Equipment Co ltd
Current assignee: Linyi Ice And Snow Refrigeration Equipment Co ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-10-26
Anticipated expiration: 2031-04-16

Abstract

The utility model relates to a refrigeration plant technical field, specifically speaking relates to a refrigeration solenoid valve of novel leading filter is equipped with. The electromagnetic valve and the pre-filter are included, an inlet and an outlet of the pre-filter are both arranged on the upper part of the side wall of the shell, the inlet and the outlet are positioned on the same horizontal line, and a top opening of the filter element is lower than the inlet and the outlet; and a plurality of axial magnetic plates are uniformly fixed on the inner wall of the filter element. The inlet and the outlet of the pre-filter of the utility model are on the same horizontal line, which is convenient for construction and has small liquid resistance; when the electromagnetic valve works, the clean refrigerating medium which is adsorbed by the magnetic sheet and filtered by the filter element enters the electromagnetic valve, so that the fault caused by the internal sealing of the electromagnetic valve is avoided; when the filter element is cleaned, impurities are taken out along with the filter element, secondary pollution of a refrigerating medium cannot be caused, and meanwhile, the pressure difference sensor monitors the blockage condition of the filter element to remind maintenance personnel to clean the filter element; the self-checking switch gives a signal whether the electromagnetic valve has a fault or not so as to prompt maintenance of the electromagnetic valve.

Description

Refrigeration solenoid valve with novel pre-filter

Technical Field

The utility model relates to a refrigeration plant technical field, specifically speaking relates to a refrigeration solenoid valve of novel leading filter is equipped with.

Background

In the prior art, large-scale ammonia and freon refrigerating systems using liquid ammonia or freon as media are basically closed circulation systems, the structure of an electromagnetic valve 21 and a pre-filter 1 thereof used in the system is shown in figure 1, the inlet of the pre-filter 1 is arranged at the upper part of the side wall of the pre-filter, a filter element 3 is fixedly assembled in the inner cavity of the pre-filter 1, and the top opening of the filter element is higher than the inlet of the pre-filter 1; the outlet of the pre-filter 1 is arranged at the bottom thereof and is connected with the inlet of the solenoid valve 21 through the pipe 6. When the electromagnetic valve works, a refrigerating medium firstly enters the outside of the filter element 3 through the inlet of the pre-filter 1, enters the inside of the filter element 3 after being filtered by the filter element 3, is discharged through the outlet at the bottom and enters the electromagnetic valve 21 through the pipeline 6. When the coil 22 of the electromagnetic valve 21 is electrified, the electromagnetic valve 21 is opened to supply liquid to the low-voltage circulating barrel 31 (or supply liquid to an evaporator for refrigeration); when the coil 22 of the electromagnetic valve 21 loses power, the electromagnetic valve 21 is closed, and the low-pressure circulating barrel 31 stops supplying liquid (or the evaporator stops supplying liquid and the storage temperature is kept).

In refrigerating system work progress, impurity such as welding slag, iron fillings stay in the system pipe usually, and simultaneously, in the system pipe after the operation many years, impurity and some tiny metal particles that can produce because of mechanical wear, these impurity and metal particle can be along with the operation of refrigerant, wherein have some tiny metal particles and pass through filter core 3, finally enter into solenoid valve 21 inside, can cause inside seal to break down to solenoid valve 21, lead to solenoid valve 21's internal leakage, seriously influence system normal operating, bring certain potential safety hazard for production simultaneously.

In addition, the impurity that filters through leading filter 1 depends on the outside at filter core 3, when taking out filter core 3 and wasing, can leave over impurity in leading filter 1's inside, causes secondary pollution.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a refrigeration solenoid valve of novel leading filter is equipped with to solve foretell technical problem.

In order to solve the above problems, the utility model adopts the following technical scheme:

the utility model provides a refrigeration solenoid valve with novel prefilter is equipped with, includes solenoid valve and prefilter, the prefilter includes the casing and assembles the filter core in the casing inner chamber, the top mouth fixed mounting of casing has gland, its characterized in that: the bottom of the shell is closed, an inlet and an outlet of the pre-filter are both arranged on the upper part of the side wall of the shell, the inlet and the outlet are positioned on the same horizontal line, a top opening of the filter element is lower than the inlet and the outlet, and a baffle is arranged between the outlet of the pre-filter and the top opening of the filter element; the outlet of the pre-filter is butted with the inlet of the electromagnetic valve; and a plurality of axial magnetic plates are uniformly fixed on the inner wall of the filter element.

Preferably, an inlet of the pre-filter is connected with an inlet pressure sampling pipeline, and an outlet of the pre-filter is connected with an outlet pressure sampling pipeline; and a differential pressure sensor is arranged between the inlet pressure sampling pipeline and the outlet pressure sampling pipeline.

Preferably, a bracket is fixed on the top of a coil of the electromagnetic valve, and a self-checking switch is fixed on the top of the bracket; the top end of the magnetic core of the electromagnetic valve penetrates out of the coil upwards; the self-checking switch is positioned above the top end of the magnetic core.

Has the advantages that: compared with the prior art, the inlet and the outlet of the pre-filter of the utility model are on the same horizontal line, which is convenient for construction and has small liquid resistance; when the electromagnetic valve works, a refrigeration medium enters the filter element from the inlet of the front filter, metal impurities are adsorbed by the magnetic sheet in the filter element, other impurities are left in the filter element, when the filter element needs to be cleaned, the impurities adsorbed and filtered in the filter element are taken out along with the filter element, secondary pollution of the refrigeration medium cannot be caused, and the clean refrigeration medium adsorbed by the magnetic sheet and filtered by the filter element enters the electromagnetic valve from the outlet of the front filter, so that the fault caused by the internal seal of the electromagnetic valve is avoided, the internal leakage of the electromagnetic valve is prevented, and the safe and stable operation of the refrigeration system is fully ensured. Meanwhile, the pressure difference sensor monitors the blocking condition of the filter element to remind maintenance personnel to clean the filter element; the self-checking switch gives a signal whether the electromagnetic valve breaks down through monitoring the magnetic core so as to prompt maintenance personnel to maintain the electromagnetic valve and bring guarantee measures for safety production.

Drawings

FIG. 1 is a schematic diagram of a conventional solenoid valve and pre-filter used in a refrigeration system;

fig. 2 is a schematic structural diagram of an embodiment of the present invention;

fig. 3 is a sectional view showing the internal structure of the pre-filter 1 of fig. 2.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Example (b):

referring to fig. 2 and 3, the refrigeration solenoid valve with the novel prefilter described in this embodiment includes a solenoid valve 21 and a prefilter 1, where the prefilter 1 includes a housing 2 and a filter element 3 assembled in an inner cavity of the housing 2, a gland 5 is fixedly assembled at a top opening of the housing 2, and a seal ring 4 is installed between the top opening of the housing 2 and the gland 5.

The bottom of casing 2 is sealed, and leading filter 1's entry and export all set up on casing 2's lateral wall upper portion, and entry, export are located same water flat line, filter core 3's top mouth is less than entry, export, is provided with the baffle between leading filter 1's export and filter core 3's the top mouth. The inlet and the outlet of the pre-filter 1 are on the same horizontal line, and the structural design has the advantages of convenient construction and small liquid resistance.

The outlet of the pre-filter 1 is butted with the inlet of the electromagnetic valve 21; and a plurality of axial magnetic plates 11 are uniformly fixed on the inner wall of the filter element 3. When the filter element 3 is needed to be cleaned, the impurities absorbed and filtered in the filter element 3 are taken out together with the filter element 3, and secondary pollution of the refrigeration medium can not be caused. The clean refrigerating medium absorbed by the magnetic sheet 11 and filtered by the filter element 3 enters the electromagnetic valve 21 from the outlet of the pre-filter 1. The refrigeration medium enters the electromagnetic valve 21, the magnetic core 24 is driven by the coil 22, the valve core of the electromagnetic valve 21 is opened, and the refrigeration medium enters the low-pressure circulating barrel 31 (or the evaporator) through the pipeline, so that the aim of supplying liquid to the low-pressure circulating barrel 31 (or the evaporator) is fulfilled.

An inlet pressure sampling pipeline 13 is connected to the inlet of the pre-filter 1, and an outlet pressure sampling pipeline 15 is connected to the outlet of the pre-filter 1; a differential pressure sensor 14 is installed between the inlet pressure sampling pipeline 13 and the outlet pressure sampling pipeline 15. The pressure difference sensor 14 sends 4 ~ 20mA analog quantity signal to the host computer, and the host computer judges the jam condition of filter core 3 according to this signal, and when the pressure value inside and outside the filter core 3 reached certain data, send the warning to remind maintainer to wash filter core 3.

A bracket 23 is fixed on the top of the coil 22 of the electromagnetic valve 21, and a self-checking switch 25 is fixed on the top of the bracket 23; the top end of a magnetic core 24 of the electromagnetic valve 21 penetrates out of the coil 22 upwards; the self-checking switch 25 is located above the top end of the magnetic core 24. When the coil 22 on the electromagnetic valve 21 is electrified, the magnetic core 24 moves upwards, and the self-detection switch 25 sends a signal to an upper computer after detecting the magnetic core 24; once the electromagnetic valve 21 breaks down, the magnetic core 24 does not act as required, the self-checking switch 25 cannot detect the magnetic core 24, and the upper computer judges that the electromagnetic valve 21 breaks down and gives an alarm to prompt maintenance personnel to maintain the electromagnetic valve 21, so that a guarantee measure is brought to safety production.

The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings are directly or indirectly applied to other related technical fields, all the same principle is within the patent protection scope of the present invention.

Claims

1. The utility model provides a refrigeration solenoid valve with novel prefilter is equipped with, includes solenoid valve (21) and prefilter (1), prefilter (1) includes casing (2) and assembles filter core (3) in casing (2) inner chamber, the fixed gland (5) that are equipped with in top mouth of casing (2), its characterized in that: the bottom of the shell (2) is closed, an inlet and an outlet of the pre-filter (1) are both arranged on the upper portion of the side wall of the shell (2), the inlet and the outlet are positioned on the same horizontal line, a top opening of the filter element (3) is lower than the inlet and the outlet, and a baffle is arranged between the outlet of the pre-filter (1) and the top opening of the filter element (3); the outlet of the pre-filter (1) is butted with the inlet of the electromagnetic valve (21); and a plurality of axial magnetic plates (11) are uniformly fixed on the inner wall of the filter element (3).

2. The refrigeration electromagnetic valve with the novel prefilter of claim 1, wherein: an inlet of the pre-filter (1) is connected with an inlet pressure sampling pipeline (13), and an outlet of the pre-filter (1) is connected with an outlet pressure sampling pipeline (15); and a differential pressure sensor (14) is arranged between the inlet pressure sampling pipeline (13) and the outlet pressure sampling pipeline (15).

3. The refrigeration electromagnetic valve with the novel prefilter installed as recited in claim 1 or 2, wherein: a bracket (23) is fixed on the top of a coil (22) of the electromagnetic valve (21), and a self-checking switch (25) is fixed on the top of the bracket (23); the top end of a magnetic core (24) of the electromagnetic valve (21) penetrates out of the coil (22) upwards; the self-checking switch (25) is positioned above the top end of the magnetic core (24).