CN111928546B

CN111928546B - Industrial water-cooled water chiller

Info

Publication number: CN111928546B
Application number: CN202010807973.1A
Authority: CN
Inventors: 吕信友; 吕若菡; 吕皓宇; 杨亚楠
Original assignee: Shenzhen Hero Tech Refrigeration Equipment Co ltd
Current assignee: Shenzhen Hero Tech Refrigeration Equipment Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-03-02
Anticipated expiration: 2040-08-12
Also published as: CN111928546A; CN113090811B; CN113048248A; CN113090811A; CN113048248B

Abstract

The invention belongs to the field of water coolers, and particularly relates to an industrial water-cooled water cooler which comprises a refrigeration cycle, a condenser water-cooled heat dissipation cycle and an evaporator cold water treatment cycle, wherein a thermostatic expansion valve in the refrigeration cycle comprises a valve shell, a push rod A, a diaphragm, a sealing cover, a spoiler, a push rod B, an adjusting tool and the like, wherein a fixed block is arranged between an accommodating groove C used for accommodating a refrigerant in the valve shell and a through groove for circulating the refrigerant, and the fixed block is provided with a circular groove A and a circular groove B which are used for communicating the accommodating groove C with the through groove; the self-locking function that two wormwheels and worm wheel cooperations had makes two telescopic links remain effectual compression throughout, and then drives two pinch rollers through two telescopic links and to the effective restriction of ejector pin B at its motion direction of perpendicular to ascending degree of freedom, increases ejector pin B natural frequency for ejector pin B is difficult to produce the vibration on the plane of its motion direction of perpendicular to, and then effectively avoids the production of "squeaking".

Description

Industrial water-cooled water chiller

Technical Field

The invention belongs to the field of water coolers, and particularly relates to an industrial water-cooled water cooler.

Background

The water coolers are classified into an air-cooled water cooler and a water-cooled water cooler in the industry, the water coolers are classified into a low-temperature water cooler and a normal-temperature water cooler in terms of temperature control, and the normal temperature is generally controlled within the range of 0-35 ℃. The temperature control of the low temperature machine is generally in the range of 0-minus 45 ℃. The water cooler refrigerant circulating system is characterized in that liquid refrigerant in an evaporator absorbs heat in water and begins to evaporate, the refrigerant absorbs the heat of the water, the liquid refrigerant is completely evaporated and changed into gas state, the gas refrigerant is sucked and compressed by a compressor, the gas refrigerant releases heat through a condenser and is condensed into liquid, the liquid refrigerant is changed into low-temperature and low-pressure refrigerant after being throttled by a thermostatic expansion valve and enters the evaporator, and the refrigerant circulating process is completed.

The thermostatic expansion valve in the water chiller is installed at the inlet of the evaporator, often called an expansion valve, and mainly has two functions of throttling and controlling the flow of the refrigerant.

The thermostatic expansion valve in the water chiller is provided with an inner balance expansion valve, an outer balance expansion valve and an H-shaped expansion valve, and the valve core of the commonly used H-shaped expansion valve moves rapidly and resets rapidly due to the pressure difference between two sides of the diaphragm in the initial short time period when the water chiller is just opened, so that the moving part of the valve core generates a 'squeaking' phenomenon. Meanwhile, the valve core for opening and closing the valve has X, Y, Z degrees of freedom in three directions in the movement process, so that the natural frequency of a valve core moving part is low, the valve core moving part is easy to vibrate in X, Y, Z three directions, and the valve core moving part is easy to resonate, so that the phenomenon of 'squeal' is caused.

Therefore, it is necessary to improve the expansion valve of the water cooling type water chiller to eliminate the squeal of the valve core moving part in the initial start of the water chiller and to effectively limit the freedom degree of the valve core moving part in Y, Z directions.

The invention designs an industrial water-cooling type water chiller to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses an industrial water-cooling type water cooling machine which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The utility model provides an industrial water-cooling type cold water machine, it includes refrigeration cycle, condenser water-cooling heat dissipation circulation, evaporimeter cold water treatment of water circulation, its characterized in that: the thermostatic expansion valve in the refrigeration cycle comprises a valve shell, a fixing block, a push rod A, a diaphragm, a sealing cover, a limiting rod, a sliding block, a connecting rod, a spoiler, a spring A, a damping rod, a push rod B, a ball head, a spring B, a telescopic rod, a spring C, U seat, a pressing wheel, an L rack, a gear A, a worm wheel, a worm, a transmission shell A and an adjusting tool, wherein the fixing block is arranged between an accommodating groove C used for accommodating a refrigerant and a through groove for circulating the refrigerant in the valve shell, and the fixing block is provided with a circular groove A and a circular groove B which are used for communicating the; the top of the accommodating groove C is provided with an upwards convex diaphragm, and the upper side of the diaphragm is provided with a sealing cover; the hollow ejector rod A arranged on the lower side of the diaphragm slides in the circular groove A in a sealing manner along the direction vertical to the flowing direction of the refrigerant in the through groove; the sealed space formed by the sealing cover and the membrane is communicated with the inside of the ejector rod A; a top rod B in sliding fit with the sliding groove A in the valve shell is arranged at the tail end of the top rod A, and the top rod B penetrates through a throttling hole communicating the accommodating groove A and the accommodating groove B; the tail end of the ejector rod B is provided with a ball head for controlling the opening of the throttling hole; and a spring B for resetting the ejector rod B is arranged in the valve shell.

Two telescopic rods are matched in a through chute B which is vertically communicated with the chute A on the side wall of the valve shell in a sliding way, and the two telescopic rods are symmetrically distributed on two sides of the ejector rod A; pressing wheels which are used for pressing the ejector rod B are respectively arranged at the opposite ends of the two telescopic rods through U seats, and annular grooves E matched with the cylindrical surface of the ejector rod B are formed in the rims of the pressing wheels; a spring C for stretching and restoring the telescopic rod is arranged in the telescopic rod; a gear A and a worm wheel with the central axis parallel to the ejector rod B are coaxially arranged in a transmission shell A arranged outside the valve shell, and two L racks meshed with the gear A are respectively connected with the exposed ends of the two telescopic rods; the shaft of the gear A is in rotary fit with the transmission shell A; two parallel worm wheels which are matched with the transmission shell A in a rotating way are meshed with the worm wheel; the matched adjusting tool is matched with the hexagonal bosses at the same side ends of the two worms to drive the two worms to synchronously and reversely rotate.

A sliding block for switching the circular groove B is in sliding fit with a sliding groove C formed in the inner wall of the circular groove B, and an L-shaped limiting rod arranged on the ejector rod A is matched with a limiting groove on the sliding block; a spring A for resetting the sliding block and a damping rod for preventing the sliding block from rapidly opening and closing the circular groove B are arranged in the sliding groove C; the spoiler positioned in the through groove is connected with the sliding block through a connecting rod, and the connecting rod moves in a movable groove B on the fixed block.

An inlet A on the valve shell is connected with an outlet of the condenser, and an outlet A on the valve shell is connected with an inlet of the evaporator; the inlet B of the through groove is connected with the outlet of the evaporator, and the outlet B of the through groove is connected with the inlet of the compressor; the space between the mandril A and the membrane and the sealing cover is filled with working medium.

As a further improvement of the technology, the sliding block is provided with a movable groove A matched with the limiting rod, and a reset inclined plane convenient for resetting the sliding block is arranged in the movable groove A;

as a further improvement of the technology, the inner wall of the chute A is provided with two ring grooves A, and each ring groove A is internally provided with a sealing ring D matched with the ejector rod B; the fixing block is arranged in the mounting groove between the holding groove C and the through groove; the inner wall of the circular groove A is provided with two ring grooves B, and a sealing ring A matched with the ejector rod A is arranged in each ring groove B; the vertical section of the limiting rod slides in a sliding groove D on the fixed block; an annular groove D is formed in the inner wall of the sliding groove D, and a sealing ring B matched with the limiting rod is installed in the annular groove D; the inner wall of the sliding groove C is provided with an annular groove C, and the annular groove C is positioned between the sliding groove D and the circular groove B; and a sealing ring C matched with the sliding block is arranged in the annular groove C.

As a further improvement of the technology, a top block is in sliding fit in the accommodating groove A along a direction perpendicular to the flowing direction of the refrigerant in the through groove, and the top block is in contact fit with a ball head at the tail end of the ejector rod B; the spring B is positioned in a circular groove C on the end face of the top block; spring B one end and circular slot C's inner wall connection, the other end is connected with holding tank A's bottom.

As a further improvement of the technology, the telescopic rod consists of an outer sleeve and an inner rod which are sleeved with each other; the spring C is positioned in the outer sleeve; one end of the spring C is connected with the end surface of the inner rod, and the other end of the spring C is connected with the inner wall of the outer sleeve; two guide blocks are symmetrically arranged on the inner rod and respectively slide in two guide grooves on the inner wall of the outer sleeve.

As a further improvement of the technology, the adjusting tool comprises a transmission shell B, transmission shafts, a gear B and a crank, wherein the two transmission shafts which are parallel to each other are in rotating fit with the transmission shell B, the gear B is arranged on each transmission shaft, and the two gears B are meshed with each other; the hexagonal grooves at the same side ends of the two transmission shafts are respectively matched with the hexagonal bosses at the tail ends of the two worms; a manual crank is arranged on one of the transmission shafts.

Compared with the traditional water chiller expansion valve, the invention has the advantages that the pressure of the refrigerant in the accommodating tank C14 changes slowly when the water chiller starts to work, so that the pressure difference change at the two sides of the diaphragm is slow in the initial starting time period of the water chiller, the diaphragm drives the ball head to move slowly through the ejector rod A and the ejector rod B, the vibration frequency of the ejector rod A and the ejector rod B in a short time is reduced, and the generation of the phenomenon of 'squeal' caused by high-frequency vibration caused by the rapid change of the pressure difference at the two sides of the diaphragm in the initial starting time period of the water chiller by moving parts such as the ejector rod A, the ejector rod B and the.

Simultaneously, two self-locking function that worm and worm wheel cooperation had make two telescopic links remain effectual compression throughout, and then drive two pinch rollers through two telescopic links and to the effective restriction of ejector pin B degree of freedom on its direction of motion of perpendicular to, increase ejector pin B natural frequency for ejector pin B is difficult to produce the vibration on the plane of perpendicular to its direction of motion, and then effectively avoids the production of "squeaking".

In addition, the abutting force of the two pressing wheels to the ejector rod B is adjusted through the matching of the adjusting tool and the two worms, so that the two pressing wheels can adjust the shaking of the ejector rod B in a plane perpendicular to the moving direction of the ejector rod B according to the actual conditions of different expansion valves and different refrigerant media, and the natural frequency of the ejector rod B is effectively increased. The invention has simple structure and better use effect.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention and its entirety.

Fig. 2 is a schematic cross-sectional view of the sealing cover, the diaphragm, the ejector rod A, the fixing block, the limiting rod and the sliding block in cooperation.

FIG. 3 is a schematic cross-sectional view of the limiting rod, the sliding block and the circular groove B.

Fig. 4 is a schematic sectional view of the telescopic rod and the top rod B.

Fig. 5 is a schematic cross-sectional view of the telescopic rod, the L rack and the gear a.

Fig. 6 is a schematic sectional view of the gear a, the worm wheel and the worm at two angles.

FIG. 7 is a schematic cross-sectional view of the ejector B, the ball and the orifice.

Fig. 8 is a cross-sectional view of the adjustment tool in cooperation with the worm.

Fig. 9 is a schematic cross-sectional view of two views of the adjustment tool.

Fig. 10 is a schematic cross-sectional view of a valve housing and its valve housing.

Fig. 11 is a schematic view of the engagement of the jack a and the jack B.

Fig. 12 is a schematic cross-sectional view of the top block.

FIG. 13 is a schematic cross-sectional view of the telescoping rod and the pinch roller in two views.

Figure 14 is a schematic view of the puck.

Fig. 15 is a schematic sectional view of a fixing block.

FIG. 16 is a schematic view of the slider, the connecting rod and the spoiler.

Number designation in the figures: 1. a valve housing; 2. an inlet A; 3. accommodating the tank A; 4. an orifice; 5. accommodating the tank B; 6. an outlet A; 7. a chute A; 8. a ring groove A; 9. a chute B; 10. a through groove; 11. an inlet B; 12. an outlet B; 13. mounting grooves; 14. accommodating a tank C; 15. a fixed block; 16. a circular groove A; 17. a ring groove B; 18. a circular groove B; 19. a chute C; 20. a ring groove C; 21. a chute D; 22. a ring groove D; 23. a mandril A; 24. a sealing ring A; 25. a membrane; 26. a sealing cover; 27. a limiting rod; 28. a seal ring B; 29. a slider; 30. a limiting groove; 31. a movable groove A; 32. resetting the inclined plane; 33. a seal ring C; 34. a connecting rod; 35. a spoiler; 36. a spring A; 37. a damping lever; 38. a mandril B; 39. a ball head; 40. a spring B; 41. a top block; 42. a circular groove C; 43. a telescopic rod; 44. a jacket; 45. a guide groove; 46. an inner rod; 47. a guide block; 48. a spring C; 49. a U seat; 50. a pinch roller; 51. a ring groove E; 52. an L rack; 53. a gear A; 54. a worm gear; 55. a worm; 56. a hexagonal boss; 57. a transmission housing A; 58. an adjustment tool; 59. a transmission case B; 60. a drive shaft; 61. a hexagonal groove; 62. a gear B; 63. a crank; 64. a seal ring D; 65. and a movable groove B.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1, it includes refrigeration cycle, condenser water-cooling heat dissipation cycle, evaporator cold water treatment cycle, its characteristic is: the thermostatic expansion valve in the refrigeration cycle comprises a valve shell 1, a fixed block 15, a top rod A23, a diaphragm 25, a sealing cover 26, a limiting rod 27, a sliding block 29, a connecting rod 34, a spoiler 35, a spring A36, a damping rod 37, a top rod B38, a ball head 39, a spring B40, an expansion rod 43, a spring C48, a U seat 49, a pinch roller 50, an L rack 52, a gear A53, a worm wheel 54, a worm 55, a transmission shell A57 and an adjusting tool 58, wherein as shown in figures 1, 2 and 15, the fixed block 15 is arranged between a containing groove C14 for containing refrigerant and a through groove 10 for circulating the refrigerant in the valve shell 1, and the fixed block 15 is provided with a round groove A16 and a round groove B18 for communicating the containing groove C14 with the; the top of the accommodating groove C14 is provided with an upwards convex diaphragm 25, and the upper side of the diaphragm 25 is provided with a sealing cover 26; a hollow ejector pin a23 mounted on the lower side of the diaphragm 25 is sealingly slid in the circular groove a16 in a direction perpendicular to the flow of the refrigerant in the through groove 10; the sealed space formed by the sealing cover 26 and the membrane 25 is communicated with the inside of the ejector rod A23; as shown in fig. 1, 7 and 10, a push rod B38 slidably engaged with a slide groove a7 in the valve housing 1 is mounted at the end of the push rod a23, and the push rod B38 passes through an orifice 4 communicating between the accommodating groove A3 and the accommodating groove B5; as shown in fig. 7 and 11, the tail end of the mandril B38 is provided with a ball head 39 for controlling the opening degree of the throttle hole 4; a spring B40 for returning the plunger B38 is installed in the valve housing 1.

As shown in fig. 4, 5 and 10, two telescopic rods 43 are slidably fitted in a through chute B9 vertically communicated with the chute a7 on the side wall of the valve housing 1, and the two telescopic rods 43 are symmetrically distributed on two sides of the ejector rod a 23; as shown in fig. 5, 13 and 14, the opposite ends of the two telescopic rods 43 are respectively provided with a pressing wheel 50 which presses against the ejector rod B38 through a U seat 49, and the rim of the pressing wheel 50 is provided with a ring groove E51 which is matched with the cylindrical surface of the ejector rod B38; the telescopic rod 43 is internally provided with a spring C48 for telescopic resetting; as shown in fig. 5 and 6, a gear a53 and a worm gear 54 with central axes parallel to the mandril B38 are coaxially installed in a transmission shell a57 installed outside the valve shell 1, and two L-shaped racks 52 engaged with the gear a53 are respectively connected with the exposed ends of two telescopic rods 43; the shaft of the gear A53 is rotationally matched with the transmission shell A57; two mutually parallel worms 55 which are rotationally matched with the transmission shell A57 are meshed with the worm wheel 54; as shown in fig. 8 and 9, a matching adjusting tool 58 is engaged with the hexagonal bosses 56 at the same side ends of the two worm screws 55 to drive the two worm screws 55 to rotate in opposite directions synchronously.

As shown in fig. 3, 15 and 16, a sliding block 29 for opening and closing the circular groove B18 is slidably fitted in a sliding groove C19 formed in the inner wall of the circular groove B18, and an L-shaped limiting rod 27 mounted on the ejector rod a23 is fitted with a limiting groove 30 on the sliding block 29; a spring A36 for resetting the sliding block 29 and a damping rod 37 for preventing the sliding block 29 from being rapidly opened and closed to the round groove B18 are arranged in the sliding groove C19; the spoiler 35 located in the through slot 10 is connected to the slider 29 by the connecting rod 34, and the connecting rod 34 moves in the movable slot B65 on the fixed block 15.

As shown in fig. 1, the inlet a2 on the valve housing 1 is connected to the condenser outlet, and the outlet a6 on the valve housing 1 is connected to the evaporator inlet; the inlet B11 of the through slot 10 is connected with the outlet of the evaporator, and the outlet B12 of the through slot 10 is connected with the inlet of the compressor; the space between the ejector rod A23 and the diaphragm 25 and the sealing cover 26 is filled with working medium.

As shown in fig. 3 and 16, the slider 29 has a movable groove a31 engaged with the stopper rod 27, and the movable groove a31 has a reset inclined surface 32 for facilitating the reset of the slider 29;

as shown in fig. 1 and 10, two ring grooves A8 are formed on the inner wall of the chute a7, and a sealing ring D64 which is matched with the ejector rod B38 is installed in each ring groove A8; as shown in fig. 2 and 10, the fixing block 15 is installed in the installation groove 13 between the accommodation groove C14 and the through groove 10; as shown in fig. 2 and 15, two ring grooves B17 are formed on the inner wall of the circular groove a16, and a sealing ring a24 which is matched with the ejector rod a23 is installed in each ring groove B17; as shown in fig. 3 and 15, the vertical section of the limiting rod 27 slides in the sliding groove D21 on the fixed block 15; an annular groove D22 is formed in the inner wall of the sliding groove D21, and a sealing ring B28 matched with the limiting rod 27 is installed in the annular groove D22; an annular groove C20 is formed in the inner wall of the sliding groove C19, and the annular groove C20 is located between the sliding groove D21 and the circular groove B18; a sealing ring C33 matched with the sliding block 29 is arranged in the annular groove C20.

As shown in fig. 7, 10 and 12, the top block 41 is slidably fitted in the accommodating groove a3 in a direction perpendicular to the flow direction of the refrigerant in the through groove 10, and the top block 41 is in contact fit with the ball head 39 at the end of the top rod B38; the spring B40 is positioned in a circular groove C42 on the end face of the top block 41; one end of the spring B40 is connected with the inner wall of the circular groove C42, and the other end is connected with the bottom of the accommodating groove A3.

As shown in fig. 13, the telescopic rod 43 is composed of an outer sleeve 44 and an inner rod 46 which are sleeved with each other; spring C48 is located in housing 44; one end of the spring C48 is connected with the end surface of the inner rod 46, and the other end is connected with the inner wall of the outer sleeve 44; two guide blocks 47 are symmetrically arranged on the inner rod 46, and the two guide blocks 47 respectively slide in the two guide grooves 45 on the inner wall of the outer sleeve 44.

As shown in fig. 8 and 9, the adjusting tool 58 comprises a transmission housing B59, a transmission shaft 60, a gear B62 and a crank 63, wherein the two transmission shafts 60 parallel to each other are rotatably matched with the transmission housing B59, each transmission shaft 60 is provided with a gear B62, and the two gears B62 are meshed with each other; the hexagonal grooves 61 at the same side ends of the two transmission shafts 60 are respectively matched with the hexagonal bosses 56 at the tail ends of the two worms 55; a manual crank 63 is mounted on one of the drive shafts 60.

The matching of the adjusting tool 58 and the two worms 55 in the invention is to improve the difficulty of adjusting the compression amount of the two telescopic rods 43, and if no special matching adjusting tool 58 is provided, the two worms 55 are difficult to be driven to synchronously and reversely rotate at the same time, so that the random adjustment of the invention by non-workers or non-workers is prevented.

The working process of the invention is as follows: in the initial state, the through groove 10 and the accommodating groove C14 are filled with the refrigerant at normal temperature, the working medium in the space between the ejector rod A23 and the diaphragm 25 and the sealing cover 26 is at normal temperature, and no pressure difference exists between the two sides of the diaphragm 25. The slider 29 is in a closed state against the circular groove B18. The end of the limit rod 27 is inserted into the limit groove 30 and limits the movement of the slide block 29. Spring A36, spring B40, and spring C48 are all in a pre-compressed energy storage state. The ball 39 at the end of the ejector pin B38 has a certain opening to the orifice 4.

Before the water chiller is used, in order to ensure that the ejector rod B38 does not shake on a plane vertical to the central axis of the ejector rod B38, the natural vibration frequency of the ejector rod B38 is increased when the water chiller is started, and the compression amount of the two telescopic rods 43 is adjusted by the matched adjusting tool 58. The hexagonal bosses 56 at the same side ends of the two worms 55 are inserted into the hexagonal grooves 61 at the same side ends of the two transmission shafts 60 of the adjusting tool 58, the crank 63 is rocked, the crank 63 drives the corresponding transmission shaft 60 to rotate, the transmission shaft 60 connected with the crank 63 drives the other transmission shaft 60 to rotate at a constant speed through the two meshing gears B62, and the rotation directions of the two transmission shafts 60 are opposite. The two transmission shafts 60 respectively drive the two worms 55 to synchronously rotate, the two worms 55 drive the worm wheel 54 to rotate, and the worm wheel 54 drives the gear A53 to synchronously rotate through the shaft on which the worm wheel is arranged. The gear a53 drives the two telescopic rods 43 to move towards each other through the two L racks 52 engaged with the gear a 53. Due to the existence of the ejector rod B38, the two telescopic rods 43 are further compressed, the spring C48 in the telescopic rod 43 is further compressed to store energy, the further compression amount of the two springs C48 is equal, and then the two pressing wheels 50 installed on the two telescopic rods 43 further press the ejector rod B38, so that the ejector rod B38 is prevented from shaking along the direction perpendicular to the central axis of the water cooler when the water cooler is started.

When the water chiller starts to start, the refrigeration cycle, the condenser water-cooling heat dissipation cycle and the evaporator cold water control cycle in the water chiller start at the same time, the temperature of the refrigerant entering the through groove 10 from the outlet of the evaporator through the inlet B11 is lower than the normal temperature, and the temperature of the refrigerant in the accommodating groove C14 changes. Meanwhile, the temperature of the working medium in the ejector rod A23 is slowly reduced after being conducted through the side wall of the ejector rod A23 under the action of the low-temperature refrigerant in the through groove 10, so that the pressure on the upper side of the diaphragm 25 is smaller than the pressure on the lower side of the diaphragm, the pressure difference generated on the two sides of the diaphragm 25 is smaller, and the pressure difference on the two sides of the diaphragm 25 is slowly increased along with the increase of the flow of the refrigerant in the through groove 10. The slowly-increasing pressure difference on the two sides of the diaphragm 25 enables the diaphragm 25 to drive the ejector rod A23 and the ejector rod B38 to move upwards slowly, and the opening degree of the ball head 39 on the ejector rod B38 to the throttling hole 4 is reduced. The top block 41 is driven by the spring B40 to synchronously move along with the ball head 39, and the spring B40 releases energy. Meanwhile, the top bar B38 drives the limit rod 27 to be separated from the limit groove 30 on the slide block 29 and removes the motion limit of the slide block 29.

When the limiting rod 27 releases the motion limitation on the sliding block 29, the refrigerant flow in the through groove 10 pushes the spoiler 35 to drive the sliding block 29 to slowly move by overcoming the pre-pressure of the spring a36 and the damping rod 37 through the connecting rod 34, the sliding block 29 gradually opens relative to the circular groove B18, the spring a36 is further compressed to store energy, and the damping rod 37 is compressed. Along with the gradual opening of the circular groove B18, the normal-temperature refrigerant in the containing groove C14 and the low-temperature refrigerant in the through groove 10 are gradually and slowly blended, so that the temperature equalization of the refrigerant in the containing groove C14 is gradually reduced, the internal pressure of the refrigerant is gradually reduced, the pressure of the refrigerant in the containing groove C14 on the lower side of the diaphragm 25 is gradually released, the pressure difference on two sides of the diaphragm 25 is gradually reduced, and the sliding block 29 is completely opened to the circular groove B18 and the pressures on two sides of the diaphragm 25 are balanced.

In the process that the slider 29 opens the circular groove B18, the refrigerant in the through groove 10 gradually communicates with and gradually fuses with the refrigerant in the containing groove C14, so that the pressure of the refrigerant in the containing groove C14 on the diaphragm 25 is gradually released and reduced, the pressure difference between two sides of the diaphragm 25 is gradually reduced, the diaphragm 25 drives the ejector rod a23 and the ejector rod B38 to start slow reset, and the ejector rod B38 drives the ball head 39 to gradually increase the opening degree of the orifice 4.

When the slider 29 is fully opened to the circular groove B18, the movement amplitude of the slider 29 reaches a limit, and the compression amount of the spring a36 and the damping rod 37 reaches a limit. The spoiler 35 moves to the limit and remains in place under the action of the flow of refrigerant within the through slot 10 until the flow of refrigerant within the through slot 10 is reduced or stopped. At this time, the ejector rod A23 drives the limit rod 27 to just reach the movable groove A31 on the slide block 29 and continue to enter the movable groove A31.

With the pressure of refrigerant in the accommodating groove C14 and working medium in the ejector rod A23 to the diaphragm 25 tending to balance, the diaphragm 25 drives the ejector rod A23 and the ejector rod B38 to completely reset, and the tail end of the limiting rod 27 is located in the movable groove A31.

When the temperature of the refrigerant entering the through groove 10 from the outlet of the evaporator through the inlet B11 is reduced, which indicates that the circulation amount of the refrigerant in the water chiller is large, the refrigerant entering the evaporator from the outlet a6 on the valve housing 1 is relatively large in relation to the load, and thus the outlet temperature of the evaporator is low. At this time, as the slider 29 is completely opened to the circular groove B18, the temperature of the refrigerant in the accommodating groove C14 and the temperature of the refrigerant in the through groove 10 are exchanged rapidly, the temperature of the refrigerant in the accommodating groove C14 is rapidly reduced, and the pressure of the refrigerant in the accommodating groove C14 is basically unchanged, while the temperature of the working medium in the ejector pin B38 is reduced slowly due to the obstruction of the ejector pin B38, so that a pressure difference is generated between the two sides of the diaphragm 25 in pressure balance, the pressure of the working medium above the diaphragm 25 is relatively reduced, the diaphragm 25 drives the ejector pin a23 and the ejector pin B38 to move upwards 3874, the top block 41 tightly follows the ball head 39 to move synchronously under the action of the spring B5, the ejector pin B38 drives the ball head 39 to reduce the opening degree of the orifice 4, thereby reducing the flow rate of the refrigerant entering the evaporator, thereby adjusting the refrigerant, and the ejector pin a23 drives.

As the temperature of the refrigerant entering through slot 10 at the evaporator outlet via inlet B11 increases, it is said that the refrigerant circulation in the chiller is slower and the refrigerant throughput is lower. At this time, since the slider 29 is fully opened to the circular groove B18, the temperature of the refrigerant in the receiving groove C14 and the temperature of the refrigerant in the through groove 10 are rapidly exchanged, the temperature of the refrigerant in the receiving groove C14 rapidly rises while the pressure against the diaphragm 25 is substantially maintained, and the temperature of the working medium in the pushrod B38 gradually rises, so that a pressure difference is generated between both sides of the diaphragm 25 at this time. The pressure of the working medium above the diaphragm 25 is relatively increased, the diaphragm 25 drives the ejector rod A23 and the ejector rod B38 to move downwards, the ball head 39 further compresses the spring B40 through the ejector block 41, the ejector rod B38 drives the ball head 39 to increase the opening of the throttling hole 4, so that the flow of the refrigerant entering the evaporator from the condenser through the evaporator is increased, the outlet temperature of the evaporator is further reduced, and the ejector rod A23 drives the limiting rod 27 to penetrate into the movable groove A31.

Before the slider 29 is completely opened to the circular groove B18, the pressure in the accommodating groove C14 changes slowly compared with the prior art because the slider and the circular groove are opened slowly, and squeaking is reduced; before and after the slider 29 is fully opened to the circular groove B18, the temperature at the outlet of the evaporator is too high or too low, and the adjustment of the related structure is the prior art, and if the description is not in place, the compensation adjustment principle of the expansion valve in the prior art can be referred to.

When the water chiller stops operating, the refrigeration cycle, the condenser water-cooling heat dissipation cycle and the evaporator cold water control cycle in the water chiller stop operating at the same time, the refrigerant in the through groove 10 stops flowing, and the slide block 29 drives the spoiler 35 to reset through the connecting rod 34 under the resetting action of the spring A36. The return of the slider 29 is slow and the circular groove B18 is slowly closed due to the presence of the damping lever 37.

When the sliding block 29 is reset, if the tail end of the limiting rod 27 is positioned in the movable groove A31, the reset of the sliding block 29 enables the reset inclined plane 32 in the movable groove A31 to interact with the tail end of the limiting rod 27, so that the limiting rod 27 drives the ejector rod A23 and the ejector rod B38 to move upwards. The top block 41 synchronously moves along with the ball head 39 under the action of the spring B40, and the ejector rod A23 and the ejector rod B38 move until the moving part of the limiting rod 27 moves to the movable groove A31.

When the sliding block 29 is completely reset under the action of the spring A36, the sliding block 29 closes the circular groove B18 again, the tail end of the limiting rod 27 is opposite to the limiting groove 30 again, and the ejector rod A23 and the ejector rod B38 drive the limiting rod 27 to be instantly inserted into the limiting groove 30 under the combined action of the pressure on the two sides of the spring B40 and the pressure on the two sides of the diaphragm 25, so that the limiting of the sliding block 29 is completed. Along with the refrigerant in the through groove 10 and the accommodating groove C14 and the working medium in the ejector rod A23 gradually tend to normal temperature, and the pressure on the two sides of the diaphragm 25 reaches new balance again.

In conclusion, the beneficial effects of the invention are as follows: according to the invention, the pressure of the refrigerant in the accommodating tank C14 changes slowly when the water chiller starts to work, so that the pressure difference change of the two sides of the diaphragm 25 is relatively slow in the initial starting time period of the water chiller, the diaphragm 25 drives the ball head 39 to move relatively slowly through the ejector rod A23 and the ejector rod B38, the vibration frequency of the ejector rod A23 and the ejector rod B38 in a short time is reduced, and the generation of a 'squeal' phenomenon caused by high-frequency vibration caused by the rapid change of the pressure difference of the two sides of the diaphragm 25 of moving parts such as the ejector rod A23 and the ejector rod B38 in the initial starting time period of the water chiller is avoided.

Meanwhile, the two telescopic rods 43 are always effectively compressed by the self-locking function of the matching of the two worms 55 and the worm gears 54, so that the two telescopic rods 43 drive the two pressing wheels 50 to effectively limit the degree of freedom of the ejector rod B38 in the direction perpendicular to the moving direction of the ejector rod B38, the natural frequency of the ejector rod B38 is increased, the ejector rod B38 is not easy to vibrate on a plane perpendicular to the moving direction of the ejector rod B38, and the generation of 'squeal' is effectively avoided.

In addition, the abutting force of the two pressing wheels 50 on the ejector rod B38 is adjusted through the matching of the adjusting tool 58 and the two worms 55, so that the two pressing wheels 50 can shake the ejector rod B38 in a plane perpendicular to the moving direction of the ejector rod B38 according to the actual conditions of different expansion valves and different refrigerant media, and the natural frequency of the ejector rod B38 is effectively increased.

Claims

1. The utility model provides an industrial water-cooling type cold water machine, it includes refrigeration cycle, condenser water-cooling heat dissipation circulation, evaporimeter cold water treatment of water circulation, its characterized in that: the thermostatic expansion valve in the refrigeration cycle comprises a valve shell, a fixing block, a push rod A, a diaphragm, a sealing cover, a limiting rod, a sliding block, a connecting rod, a spoiler, a spring A, a damping rod, a push rod B, a ball head, a spring B, a telescopic rod, a spring C, U seat, a pressing wheel, an L rack, a gear A, a worm wheel, a worm, a transmission shell A and an adjusting tool, wherein the fixing block is arranged between an accommodating groove C used for accommodating a refrigerant and a through groove for circulating the refrigerant in the valve shell, and the fixing block is provided with a circular groove A and a circular groove B which are used for communicating the; the top of the accommodating groove C is provided with an upwards convex diaphragm, and the upper side of the diaphragm is provided with a sealing cover; the hollow ejector rod A arranged on the lower side of the diaphragm slides in the circular groove A in a sealing manner along the direction vertical to the flowing direction of the refrigerant in the through groove; the sealed space formed by the sealing cover and the membrane is communicated with the inside of the ejector rod A; a top rod B in sliding fit with the sliding groove A in the valve shell is arranged at the tail end of the top rod A, and the top rod B penetrates through a throttling hole communicating the accommodating groove A and the accommodating groove B; the tail end of the ejector rod B is provided with a ball head for controlling the opening of the throttling hole; a spring B for resetting the ejector rod B is arranged in the valve shell;

two telescopic rods are matched in a through chute B which is vertically communicated with the chute A on the side wall of the valve shell in a sliding way, and the two telescopic rods are symmetrically distributed on two sides of the ejector rod A; pressing wheels which are used for pressing the ejector rod B are respectively arranged at the opposite ends of the two telescopic rods through U seats, and annular grooves E matched with the cylindrical surface of the ejector rod B are formed in the rims of the pressing wheels; a spring C for stretching and restoring the telescopic rod is arranged in the telescopic rod; a gear A and a worm wheel with the central axis parallel to the ejector rod B are coaxially arranged in a transmission shell A arranged outside the valve shell, and two L racks meshed with the gear A are respectively connected with the exposed ends of the two telescopic rods; the shaft of the gear A is in rotary fit with the transmission shell A; two parallel worm wheels which are matched with the transmission shell A in a rotating way are meshed with the worm wheel; the matched adjusting tool is matched with the hexagonal bosses at the same side ends of the two worms to drive the two worms to synchronously and reversely rotate;

a sliding block for switching the circular groove B is in sliding fit with a sliding groove C formed in the inner wall of the circular groove B, and an L-shaped limiting rod arranged on the ejector rod A is matched with a limiting groove on the sliding block; a spring A for resetting the sliding block and a damping rod for preventing the sliding block from rapidly opening and closing the circular groove B are arranged in the sliding groove C; the spoiler positioned in the through groove is connected with the sliding block through a connecting rod, and the connecting rod moves in a movable groove B on the fixed block;

2. The industrial water-cooled water chiller as set forth in claim 1 wherein: the sliding block is provided with a movable groove A matched with the limiting rod, and a reset inclined plane convenient for the sliding block to reset is arranged in the movable groove A.

3. The industrial water-cooled water chiller as set forth in claim 1 wherein: two ring grooves A are formed in the inner wall of the sliding groove A, and a sealing ring D matched with the ejector rod B is installed in each ring groove A; the fixing block is arranged in the mounting groove between the holding groove C and the through groove; the inner wall of the circular groove A is provided with two ring grooves B, and a sealing ring A matched with the ejector rod A is arranged in each ring groove B; the vertical section of the limiting rod slides in a sliding groove D on the fixed block; an annular groove D is formed in the inner wall of the sliding groove D, and a sealing ring B matched with the limiting rod is installed in the annular groove D; the inner wall of the sliding groove C is provided with an annular groove C, and the annular groove C is positioned between the sliding groove D and the circular groove B; and a sealing ring C matched with the sliding block is arranged in the annular groove C.

4. The industrial water-cooled water chiller as set forth in claim 1 wherein: a top block is matched in the accommodating groove A in a sliding mode along the direction perpendicular to the flowing direction of the refrigerant in the through groove, and the top block is in contact fit with a ball head at the tail end of the ejector rod B; the spring B is positioned in a circular groove C on the end face of the top block; spring B one end and circular slot C's inner wall connection, the other end is connected with holding tank A's bottom.

5. The industrial water-cooled water chiller as set forth in claim 1 wherein: the telescopic rod consists of an outer sleeve and an inner rod which are sleeved with each other; the spring C is positioned in the outer sleeve; one end of the spring C is connected with the end surface of the inner rod, and the other end of the spring C is connected with the inner wall of the outer sleeve; two guide blocks are symmetrically arranged on the inner rod and respectively slide in two guide grooves on the inner wall of the outer sleeve.

6. The industrial water-cooled water chiller as set forth in claim 1 wherein: the adjusting tool comprises a transmission shell B, transmission shafts, gears B and a crank, wherein the two transmission shafts which are parallel to each other are in rotating fit with the transmission shell B, each transmission shaft is provided with the gear B, and the two gears B are meshed with each other; the hexagonal grooves at the same side ends of the two transmission shafts are respectively matched with the hexagonal bosses at the tail ends of the two worms; a manual crank is arranged on one of the transmission shafts.