CN208332776U - A kind of double media expansion valve filling systems of efficient stable - Google Patents

Abstract

The utility model relates to a kind of double media expansion valve filling systems of efficient stable, including filling tooling, nitrogen gas tank, refrigerant tank and vacuum pumping pump, it fills tooling and is equipped with upper top gas cylinder and lower top gas cylinder, filling chamber seat is equipped between upper top gas cylinder and lower top gas cylinder, filling chamber seat, which is equipped with, is filled with pipe, uniguide and second pressure pipe, it is filled on pipe and uniguide and is respectively equipped with shut-off valve and check valve, and end is connected with the first three-way connection, first three-way connection is equipped with first pressure pipe, first pressure pipe is equipped with first pressure sensor, and it is connected with four-way connection, four-way connection and nitrogen gas tank, nitrogen tube is respectively equipped between refrigerant tank and vacuum pumping pump, refrigerant pipe and vacuum tube；The utility model good airproof performance is controlled using unidirectional pipeline, it can be ensured that pours corresponding gas when filling operation, filling refrigerant pressure, cold coal amount and gross pressure is set to reach sets requirement, guarantee that double media are accurately filled with, reduces automation filling difficulty, improve the service performance of refrigeration equipment.

Description

A kind of double media expansion valve filling systems of efficient stable

Technical field

The utility model relates to a kind of double media expansion valve filling systems of efficient stable, belong to refrigeration equipment technology neck Domain.

Background technique

Expansion valve involved in refrigeration equipment is controlled by controlling the degree of superheat of evaporator outlet gaseous refrigerant into steaming The refrigerant flow of device is sent out, the throttling of condensing pressure to evaporating pressure is realized, by the condensed high temperature and pressure liquid system of condenser Cryogen reducing pressure by regulating flow becomes the liquid-vapor mixture for holding evaporable low-temp low-pressure, evaporates into evaporator, absorbs external heat； The temperature signal obtained simultaneously according to temperature sensing package or air tank head, controls the flow of refrigerant, work directly determines whole system Work quality, ensure that in optimal manner to evaporator feed flow, the degree of superheat of evaporator outlet refrigerant vapour is stablized, and Air box head parts direct relation at the top of the expansion valve crucial application performance of expansion valve, needs to be filled with the nitrogen with system matches Medium and inert gas, requirement when filling especially for this double media to the amount of pouring are very stringent.

For the duration performance for guaranteeing refrigeration equipment, the requirement to expansion valve filling system is also higher and higher, sealing performance The often stability of relationship filling quality, such as a kind of thermostatic expansion valve bellows gaseous mixture that patent CN206531321U is proposed Body filling device using three solenoid valve blocks at a valve group, then makes to fill pipeline with O-ring seal in filling chamber top two sides More compact structure spatial volume it is smaller, with pressure sensor directly with filling chamber seat connect make cancellation vacuumize for the second time, But it is this by solenoid valve double-direction control after evacuation, be first passed through first medium such as nitrogen, then be passed through second medium such as refrigerant Structural approach, medium back flow can be made when pouring again, can not ensure whether poured corresponding gas, causes the amount of pouring and to fill It is also unstable to infuse gross pressure, it is difficult to by set value calculation, substantially increase automation difficulty；

For another example patent CN102305504A provides a kind of thermal expansion valve power head automatic cross filling device, by It is respectively fixedly connected with upper and lower air cylinders in upper and lower cover plates, is oriented to sliding using sliding rail and guarantees stability, fill power head or less partially Dispensing device is in sealing state, the air-channel system for applying this filling device as shown in Figure 4 is disclosed, by nitrogen pipeline, refrigerant Pipeline, vacuum line are connected with blowdown piping, control refrigerant pressure table and nitrogen pressure table before filling, adjust refrigerant pressure reducing valve and Nitrogen pressure reducing valve makes air inlet refrigerant and nitrogen be in stable pressure, then seal inflation part, opens vacuum valve and vacuumizes, according to Secondary folding valve inflated with nitrogen fills refrigerant, judges vacuum, refrigerant and nitrogen state with the pressure sensor in terminal, and with refrigerant pipe Two refrigerant valve actions on the road prevent during filling nitrogen to recoil the problem for causing refrigerant impure in cold media gas, but fill End could deflate, and otherwise entering air in pipeline will affect system circulation, result in blockage, pipeline is made to generate noise, reduce refrigeration Effect, this structure can still be filled with nitrogen, and when opening nitrogen valve, cold media gas recoil is passed back into nitrogen pipeline, not only nitrogen Gas fills pressure transient, when it is big when it is small, cannot keep within the set range, and it is unstable to fill cold coal amount, when it is more when it is few, no Being able to maintain causes to be difficult to ensure the accuracy for the amount of pouring when double medium fillings within the set range, even if being further added by a nitrogen Valve is to improve such case, and not only the more control of valve is difficult, and cost is also higher, can not play remarkable result.

Utility model content

The purpose of this utility model is that in view of the drawbacks of the prior art, the double media expansion valves for providing a kind of efficient stable fill Injection system, good airproof performance, using unidirectional pipeline control, it can be ensured that filling operation when pour corresponding gas, make fill refrigerant pressure, Cold coal amount and gross pressure can reach sets requirement, guarantee that double media are accurately filled with, and reduce automation filling difficulty, improve refrigeration and set Standby service performance.

The utility model is achieved by the following technical solutions:

A kind of double media expansion valve filling systems of efficient stable, including fill tooling, nitrogen gas tank, refrigerant tank and vacuumize Pump, the filling tooling are equipped with upper top gas cylinder and lower top gas cylinder, and filling chamber is equipped between the upper top gas cylinder and lower top gas cylinder Seat, wherein the filling chamber seat is equipped with and is filled with pipe and uniguide, it is described be filled on pipe and uniguide be respectively equipped with shut-off valve with Check valve, and end is connected with the first three-way connection, first three-way connection is equipped with first pressure pipe, the first pressure Pipe is equipped with first pressure sensor, and is connected with four-way connection, and the filling chamber seat is equipped with second pressure pipe, and described second Pressure pipe is equipped with second pressure sensor；

Nitrogen tube, refrigerant pipe and vacuum are respectively equipped between the four-way connection and nitrogen gas tank, refrigerant tank and vacuum pumping pump Pipe, by nitrogen gas tank to four-way connection direction, is successively arranged the first ball valve, the first regulating valve and the first electromagnetism in the nitrogen tube Valve is successively arranged the second ball valve, the second regulating valve and the second electromagnetism by refrigerant tank to four-way connection direction on the refrigerant pipe Valve is successively arranged third ball valve and third solenoid valve on the vacuum tube by vacuum pumping pump to four-way connection direction.

Double media expansion valve filling systems of above-mentioned a kind of efficient stable, wherein on the upper top gas cylinder and lower top gas cylinder It is respectively equipped with the first tracheae and the second tracheae, the 4th solenoid valve is equipped on first tracheae and the second tracheae, and end connects The second three-way connection is connect, second three-way connection is connected with the 4th ball valve and air compressor machine in turn.

A kind of double media expansion valve filling systems of above-mentioned efficient stable, wherein the upper top gas cylinder and filling chamber seat it Between be equipped with sealing, the sealing section is in U-shape structure.

A kind of double media expansion valve filling systems of above-mentioned efficient stable, wherein the lower top gas cylinder and filling chamber seat it Between be equipped with seal receptacle, the first rotating ring and the second rotating ring being provided symmetrically in the seal receptacle, first rotating ring section are in L Shape structure, and pressure spring is equipped between the second rotating ring, stationary ring, the stationary ring are equipped at the top of second rotating ring between seal receptacle The T-shaped structure in section is equipped with O shape between first rotating ring and the second rotating ring and lower top gas cylinder, between stationary ring and seal receptacle Sealing ring.

The utility model has the following beneficial effects:

The utility model structure novel is compact, design is reasonable, easy to use and operate, and shut-off valve is opened control and once vacuumized Afterwards, using the unidirectional pipeline control of check valve when refrigerant and nitrogen sequence fill, shut-off valve is closed control secondary vacuum pumping, will be filled Residual nitrogen or refrigerant discharge in the outer pipeline of tooling, not only avoid medium back flow when second of medium pours cause nitrogen gas tank or The defect that purity declines in refrigerant tank, and pipeline is in vacuum state when ensuring each filling, so that it is filled with corresponding medium, by The detection of first, second pressure sensor is stablized, and filling refrigerant pressure, cold coal amount and gross pressure can reach sets requirement, is guaranteed double Medium is accurately filled with, and is additionally used the first tracheae and the second tracheae and is controlled top gas cylinder and lower top gas cylinder operation respectively, reduces certainly Dynamicization fills difficulty, guarantees the sealing performance that chamber seat is filled during filling with sealing and sealing holder structure, to sufficiently mention The service performance of high refrigeration equipment.

Detailed description of the invention

FIG. 1 is a schematic structural view of the utility model.

Fig. 2 is the portion the A schematic enlarged-scale view of Fig. 1.

(in figure, filling tooling 1, nitrogen gas tank 2, refrigerant tank 3 and vacuum pumping pump 4, upper top gas cylinder 5 and lower top gas cylinder 6, filling Chamber seat 7 is filled with pipe 8 and uniguide 11, shut-off valve 15 and check valve 14, the first three-way connection 29, first pressure pipe 55, the first pressure Force snesor 13, four-way connection 9, second pressure pipe 56, second pressure sensor 45, nitrogen tube 17, refrigerant pipe 18 and vacuum tube 19, the first ball valve 20, the first regulating valve 23 and the first solenoid valve 24, the second ball valve 25, the second regulating valve 26 and second solenoid valve 27, third ball valve 28 and third solenoid valve 30, the first tracheae 38 and the second tracheae 39, the 4th solenoid valve 40, the second three-way connection 41, the 4th ball valve 42, air compressor machine 43, sealing 31, seal receptacle 32, the first rotating ring 33 and the second rotating ring 34, pressure spring 35, stationary ring 36, O-ring seals 37, air box head parts 21 and steel ball 22).

Specific embodiment

Specific embodiment of the present utility model is described further with reference to the accompanying drawing.

A kind of double media expansion valve filling systems of efficient stable, including filling tooling 1, nitrogen gas tank 2, refrigerant tank 3 and pumping Vacuum pump 4, the filling tooling 1 is equipped with upper top gas cylinder 5 and lower top gas cylinder 6, between the upper top gas cylinder 5 and lower top gas cylinder 6 Equipped with filling chamber seat 7, wherein the filling chamber seat 7 is equipped with and is filled with pipe 8 and uniguide 11, described to be filled with pipe 8 and uniguide 11 On be respectively equipped with shut-off valve 15 and check valve 14, and end is connected with the first three-way connection 29, on first three-way connection 29 Equipped with first pressure pipe 55, the first pressure pipe 55 is equipped with first pressure sensor 13, and is connected with four-way connection 9, institute It states filling chamber seat 7 and is equipped with second pressure pipe 56, the second pressure pipe 56 is equipped with second pressure sensor 45；

Nitrogen tube 17, refrigerant pipe are respectively equipped between the four-way connection 9 and nitrogen gas tank 2, refrigerant tank 3 and vacuum pumping pump 4 18 and vacuum tube 19, by nitrogen gas tank 2 to 9 direction of four-way connection, the first ball valve 20, first tune is successively arranged in the nitrogen tube 17 It saves valve 23 and the first solenoid valve 24 and second ball valve is successively arranged on the refrigerant pipe 18 by refrigerant tank 3 to 9 direction of four-way connection 25, the second regulating valve 26 and second solenoid valve 27 are successively set on the vacuum tube 19 by vacuum pumping pump 4 to 9 direction of four-way connection There are third ball valve 28 and third solenoid valve 30；

The first tracheae 38 and the second tracheae 39, first tracheae are respectively equipped on the upper top gas cylinder 5 and lower top gas cylinder 6 38 and second are equipped with the 4th solenoid valve 40 on tracheae 39, and end connects the second three-way connection 41, second three-way connection 41 are connected with the 4th ball valve 42 and air compressor machine 43 in turn, are equipped with sealing 31, institute between the upper top gas cylinder 5 and filling chamber seat 7 31 section of sealing is stated to be in U-shape structure；

It is equipped with seal receptacle 32 between the lower top gas cylinder 6 and filling chamber seat 7, is provided symmetrically in the seal receptacle 32 First rotating ring 33 and the second rotating ring 34, the L-shaped structure in 33 section of the first rotating ring, and pressure spring is equipped between the second rotating ring 34 35, it is equipped with stationary ring 36 between second rotating ring, 34 top and seal receptacle 32, the T-shaped structure in 36 section of stationary ring, described the O-ring seals 37 are equipped between one rotating ring 33 and the second rotating ring 34 and lower top gas cylinder 6, between stationary ring 36 and seal receptacle 32.

The working method of the utility model are as follows:

The variation for observing first pressure sensor 13, adjusts 26 aperture of the first regulating valve 23 and the second regulating valve respectively, controls Nitrogen flow and cold medium flux processed, by the top of expansion valve air box head parts 21 and steel ball 22 be placed in filling chamber seat 7, open the Four ball valves 42, control air compressor machine 43 work, and lower 6 downlink of top gas cylinder are manipulated by the folding of the 4th solenoid valve 40, if multiple filling toolings 1 It works at the same time, the 4th solenoid valve 40 can be substituted with gas source junction box and manipulated simultaneously, form seal receptacle 32 and the filling closure of chamber seat 7 Lower seal performance is improved by U-shaped sealing 31, in lower top gas cylinder in the axial direction of upper top gas cylinder 5 in closed filling space It is close with being combined into T shape stationary ring 36 and O shape shape sealing ring and L shape the first rotating ring 33 and the second rotating ring 34 by seal receptacle 32 on 6 Cover effectively prevent medium to reveal, and so that rotating ring is had certain floatability by pressure spring 35, generates reasonable face pressure, The good fit for guaranteeing rotating ring and stationary ring 36 can make rotating ring can produce axial movement, compensation and buffering after sealing surface wear Effect, improve mechanical service life and sealing performance；

The first solenoid valve 24 and second solenoid valve 27 are first closed, third solenoid valve 30 and shut-off valve 15 are opened, opens and takes out very Sky pump 4 once vacuumizes, and observes the variation of first pressure sensor 13 and second pressure sensor 45, makes vacuum guarantor Pressure is then turned off third solenoid valve 30, opens the second ball valve 25, second solenoid valve 27 and check valve 14, and with the second regulating valve 26 adjust cold medium fluxes, refrigerant tank 3 from refrigerant pipe 18 through first pressure pipe 55, uniguide 11 under the control of check valve 14 to being filled with Pipe 8 fills refrigerant, until pressure sensor 13, the instruction filling pressure of second pressure sensor 45 reaches setting value, closes check valve 14, second solenoid valve 27, the second ball valve 25 and shut-off valve 15, filling refrigerant finish；

Third solenoid valve 30 is opened after filling refrigerant, shut-off valve 15 is to close at this time, opens vacuum pumping pump 4 and carries out Secondary vacuum pumping, observation first pressure sensor 13 change, and fill the refrigerant except tooling in pipeline and pump, make vacuum Pressure maintaining, since check valve 14 is unidirectionally controlled, to prevent refrigerant return, refrigerant enters nitrogen through nitrogen tube 17 caused by avoiding because of reflux Gas tank 2 causes purity to decline；

After secondary vacuum pumping, third solenoid valve 30 is closed, opens the first ball valve 20, the first solenoid valve 24 and check valve 14, and nitrogen flow is adjusted with the first regulating valve 23, nitrogen gas tank 2 is by nitrogen tube 17 through first pressure pipe 55, uniguide 11 in list Fill nitrogen to valve 14 to pipe 8 is filled with, the instruction filling pressure of second pressure sensor 45 reaches setting value, close check valve 14, First solenoid valve 24 and the first ball valve 20；

Top gas cylinder 5 rises in control, and the carry out steel ball 22 of the air box head parts 21 filled in chamber seat 7 is welded, is reduced certainly Dynamicization fills difficulty, guarantees the sealing performance of filling chamber seat 7 during filling with sealing 31 and 32 structure of seal receptacle, to fill Divide the service performance of raising refrigeration equipment.

The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in Change or replacement, should all cover within the protection scope of the present utility model.Therefore, the protection scope of the utility model should be with Subject to the protection scope of claims.

Claims (4)

1. a kind of double media expansion valve filling systems of efficient stable, including fill tooling, nitrogen gas tank, refrigerant tank and vacuumize Pump, the filling tooling are equipped with upper top gas cylinder and lower top gas cylinder, and filling chamber is equipped between the upper top gas cylinder and lower top gas cylinder Seat, it is characterized in that, the filling chamber seat is equipped with and is filled with pipe and uniguide, and described be filled on pipe and uniguide is respectively equipped with cut-off Valve and check valve, and end is connected with the first three-way connection, first three-way connection are equipped with first pressure pipe, and described first Pressure pipe is equipped with first pressure sensor, and is connected with four-way connection, and the filling chamber seat is equipped with second pressure pipe, described Second pressure pipe is equipped with second pressure sensor；

Nitrogen tube, refrigerant pipe and vacuum tube are respectively equipped between the four-way connection and nitrogen gas tank, refrigerant tank and vacuum pumping pump, by Nitrogen gas tank is successively arranged the first ball valve, the first regulating valve and the first solenoid valve in the nitrogen tube, by cold to four-way connection direction Matchmaker's tank is successively arranged the second ball valve, the second regulating valve and second solenoid valve on the refrigerant pipe to four-way connection direction, true by taking out Sky pump is successively arranged third ball valve and third solenoid valve on the vacuum tube to four-way connection direction.

2. a kind of double media expansion valve filling systems of efficient stable as described in claim 1, it is characterized in that, the upper top gas It is respectively equipped with the first tracheae and the second tracheae on cylinder and lower top gas cylinder, the 4th electricity is equipped on first tracheae and the second tracheae Magnet valve, and end connects the second three-way connection, second three-way connection is connected with the 4th ball valve and air compressor machine in turn.

3. a kind of double media expansion valve filling systems of efficient stable as described in claim 1, it is characterized in that, the upper top gas It is equipped with sealing between cylinder and filling chamber seat, the sealing section is in U-shape structure.

4. a kind of double media expansion valve filling systems of efficient stable as described in claim 1, it is characterized in that, the lower top gas Seal receptacle is equipped between cylinder and filling chamber seat, the first rotating ring and the second rotating ring being provided symmetrically in the seal receptacle are described The first L-shaped structure in rotating ring section, and pressure spring is equipped between the second rotating ring, it is set between seal receptacle at the top of second rotating ring There is a stationary ring, the T-shaped structure in stationary ring section, between first rotating ring and the second rotating ring and lower top gas cylinder, stationary ring and sealing O-ring seals are equipped between seat.