Water cooler with intelligent adjusting function

Abstract

The invention discloses a cooling-water machine with an intelligent adjusting function, and relates to the technical field of cooling-water machines. Comprising a case, a water tank, a compressor, a condenser, an evaporator, an expansion valve, a detection compensation device and a water pump, the compression amount of a detection spring is converted into the electric charge amount of piezoelectric ceramics, and when the strength of an electric signal exceeds an early warning value, a control system automatically shuts down the cooling-water machine and gives an alarm to prevent the liquid impact phenomenon, so that the purpose of emergency protection of the cooling-water machine is achieved. The expansion valve is used for controlling refrigerant flow and maintaining constant heat of an evaporator outlet, when the expansion valve is not adjusted properly, impact of liquid refrigerant on a detection blade is converted into displacement of the piston head, and the piston head is used for pressing a compression medium into the compensation cavity, so that the compensation assembly pushes the valve rod to displace, and a gap between the plugging head and the valve body is reduced; the purpose of conducting secondary compensation adjustment on the refrigerant amount of the expansion valve is achieved, excessive outflow of the liquid refrigerant is avoided, and the risk that the compressor generates liquid impact is avoided in advance.

Description

Technical Field

[0001] The present invention relates to the technical field of chillers, and specifically to a chiller with an intelligent adjustment function. Background Art

[0002] As a core refrigeration device, a chiller continuously outputs low-temperature chilled water through thermodynamic principles such as mechanical compression and absorption, and is widely used in industrial manufacturing, commercial buildings, and precision environmental temperature control fields. In industrial production, the chiller provides a stable cooling medium for processes such as injection molding, laser cutting, and semiconductor production; in daily life, it serves as the cold source of the central air-conditioning system, driving the terminal fan coil units or air handling units to achieve refrigeration; in addition, the chiller also plays a key role in emerging fields such as medical equipment cooling, data center thermal management, and new energy battery thermal control.

[0003] However, many problems and faults will occur during the actual use of the chiller, and the liquid hammer phenomenon has attracted much attention due to its greater harm. The liquid hammer phenomenon is mainly caused by the fact that the liquid refrigerant fails to be fully vaporized in the evaporator and enters the compressor in a liquid state. During normal operation, the expansion valve adjusts an appropriate refrigerant flow rate, so that the liquid refrigerant entering the evaporator is completely vaporized after absorbing enough heat, forming a low-temperature and low-pressure gas. But when the expansion valve is adjusted improperly (such as over-opening), or the heat exchange of the evaporator is insufficient, or the load changes violently, some liquid refrigerant is carried into the compressor without being completely vaporized. Due to the incompressibility of the liquid, a violent impact will be generated on the compressor during the compression process, resulting in mechanical components being subjected to an instantaneous high-pressure impact, thereby causing wear, deformation, or fracture, and ultimately leading to system failures and shutdowns. Summary of the Invention

[0004] The purpose of the present invention is to provide a chiller with an intelligent adjustment function to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A chiller with an intelligent adjustment function includes a chassis. Inside the chassis, a water tank, a condenser, an evaporator, a compressor, and a water pump are respectively installed. The water tank is connected to the water pump through a pipeline, the water pump is connected to the condenser through a pipeline, the compressor is connected to the condenser through a pipeline, the condenser is connected to the evaporator through a pipeline, an expansion valve is installed on the pipeline between the condenser and the evaporator, the evaporator is connected to the compressor through a pipeline, a temperature sensing bulb is externally connected to the expansion valve through a pipeline, the temperature sensing bulb is installed on the pipeline at the outlet end of the evaporator, a detection and compensation device is installed on the pipeline at the inlet end of the compressor, and the detection and compensation device is connected to the expansion valve through a pipeline.

[0006] A control system is provided inside the chiller, and the control system is used to control the entire chiller.

[0007] The compressor compresses the refrigerant gas at low temperature and low pressure into a high-temperature and high-pressure gas, and transports it to the condenser through a pipeline. The refrigerant exchanges heat with the cooling water and releases heat to condense into a liquid. Then, the liquid refrigerant passes through the expansion valve for throttling and pressure reduction and enters the evaporator. Under the action of the evaporator, it absorbs heat and completes vaporization, and finally returns to the compressor to complete the refrigerant cycle.

[0008] The water pump extracts the cooling water from the water tank and sends the cooling water into the condenser to help the refrigerant dissipate heat. After heat exchange, the water with increased temperature flows back to the water tank through the pipeline, and after heat dissipation or cooling, it is pumped back by the water pump again to complete the cooling water cycle.

[0009] The water pump extracts a part of the water through shunt control and sends it into the evaporator. In the evaporator, the water exchanges heat with the refrigerant at low temperature and low pressure. The refrigerant absorbs the heat in the water and vaporizes, and the water temperature drops to become chilled water. The chilled water after being cooled by the evaporator is then transported to external equipment through the pipeline to absorb the heat generated by the equipment and achieve the cooling effect. The used water then flows back to the water tank, and the whole cycle repeats continuously.

[0010] The refrigerant cycle and the water cycle work together, enabling the chiller to efficiently transfer the circulating heat of the refrigerant and maintain a stable supply of cooling water, thereby achieving the overall refrigeration effect.

[0011] Furthermore, the detection and compensation device includes a housing. Both ends of the housing are connected to pipelines. A bracket is installed inside the housing, a detection compensator is installed on the bracket, a bearing is installed on the detection compensator, a rotating cylinder is installed on the bearing, several detection vanes are installed on the rotating cylinder, a conversion component is slidably installed on the rotating cylinder, the conversion component is slidably connected to the detection vanes, the conversion component is connected to the detection compensator, and the housing is connected to the expansion valve through a pipeline.

[0012] When the refrigerant in the evaporator flows back to the compressor through the pipeline, it will first pass through the detection and compensation device. Under normal conditions, the vaporized refrigerant enters from the bottom of the housing, then passes upward through the detection vanes and flows out from the top of the housing. Since the impact of the vaporized refrigerant on the detection vanes is small, the detection vanes do not deflect. When the expansion valve is adjusted improperly and too much refrigerant is delivered to the evaporator, liquid refrigerant will flow out of the evaporator. At this time, due to the large impact of the liquid refrigerant on the detection vanes, under the action of the impact force, the detection vanes drive the rotating cylinder to rotate on the bearing. The rotation generates centrifugal force, and under the action of the centrifugal force, the gravity slider slides along the second chute on the sliding bar towards the outer edge of the detection vanes. The gravity slider pulls the transmission frame to slide downward and contract along the first chute through the transmission rod. The transmission frame rotates with the rotating cylinder and drives the push rod to move downward. The push rod rotates while pushing the piston head downward. Since the piston head is rotatably connected to the push rod and the piston head is slidably connected to the column shell and cannot rotate, the piston head only slides downward along the column shell, and the piston head squeezes the detection spring and the compression medium in the compression chamber downward.

[0013] Further, the detection compensator includes a columnar shell, which is installed on a bracket. The columnar shell is in communication with the bracket. A bearing is installed on the columnar shell. A piston head is slidably installed inside the columnar shell. A push rod is rotatably installed on the piston head. The push rod is connected to a conversion assembly. A piezoelectric ceramic is installed inside the columnar shell. A force transmission sheet is slidably installed inside the columnar shell. The force transmission sheet is in contact with the piezoelectric ceramic. A detection spring is installed between the force transmission sheet and the piston head.

[0014] After the detection spring is compressed, it squeezes the force transmission sheet downward. The force transmission sheet squeezes the piezoelectric ceramic. After the piezoelectric ceramic is compressed, it generates electric charges. The electric signal is transmitted to the control system through a wire. The control system judges the flow rate of the liquid refrigerant according to the strength of the electric signal. When the flow rate of the liquid refrigerant is too large, the intensity of the electric signal exceeds the warning value. The control system shuts down the chiller emergently and sends an alarm to the staff to avoid too much liquid refrigerant entering the compressor, causing liquid hammer and damaging the compressor.

[0015] Further, a compression chamber is formed among the columnar shell, the force transmission sheet and the piston head. A compression medium is filled in the compression chamber. A compression hole is provided on the bracket. The compression hole penetrates through the housing and the columnar shell. One end of the compression hole is in communication with the compression chamber. The other end of the compression hole is in communication with an expansion valve through a pipeline.

[0016] After the compression medium is squeezed, it enters the compensation chamber from the compression chamber through the compression hole and the pipeline. The pressure in the compensation chamber increases. After the force transmission plate is compressed, it squeezes the lower push plate upward through a force transmission rod. The lower push plate squeezes the adjusting spring. After the adjusting spring is compressed, its elastic force increases. After the lower push plate receives the increased elastic force, it pushes the valve rod upward. The plugging head on the valve rod moves upward. The gap between the plugging head and the valve body decreases. The flow rate of the refrigerant passing through the gap decreases. The flow rate of the refrigerant entering the evaporator decreases, achieving the purpose of secondary compensation adjustment of the refrigerant amount of the expansion valve and avoiding the liquid hammer phenomenon.

[0017] Further, the conversion assembly includes a transmission frame, a transmission rod and a gravity slider. A sliding strip is provided on the detection blade. A second sliding groove is provided on the sliding strip. The gravity slider is slidably installed in the second sliding groove. A plurality of first sliding grooves are provided on the rotating cylinder. The transmission frame is slidably installed in the first sliding groove. One end of the transmission rod is rotatably connected to the transmission frame. The other end of the transmission rod is rotatably connected to the gravity slider. The transmission frame is connected to the push rod.

[0018] Further, the expansion valve includes a valve body. An inlet and an outlet are respectively provided on the valve body. The inlet is in communication with a condenser through a pipeline. The outlet is in communication with an evaporator through a pipeline. A spring piece is installed inside the valve body. A valve rod is slidably installed inside the valve body. A plugging head is provided on the valve rod. An upper pressure plate is installed at the bottom end of the valve rod. A compensation assembly is slidably installed inside the valve body. An adjusting spring is installed between the compensation assembly and the upper pressure plate. The valve body is in communication with the compression hole through a pipeline. The valve body is in communication with the inside of a temperature sensing bulb through a pipeline.

[0019] The refrigerant enters the inlet through a pipeline from the condenser, flows into the valve body from the inlet, enters the outlet through the gap between the valve body and the plug head, and then enters the evaporator through the pipeline.

[0020] When the temperature rises, the heat transfer liquid expands due to heat. The heat transfer liquid enters the extrusion chamber through a pipeline and exerts extrusion on the elastic piece. The elastic piece squeezes the valve stem downward. The valve stem moves downward and squeezes the adjusting spring through the upper pressing plate. The plug head on the valve stem moves downward with the valve stem, and the gap between the plug head and the valve body increases. The flow rate of the refrigerant passing through the gap increases, and the refrigerant entering the evaporator increases, thereby cooling the evaporator.

[0021] When the temperature drops, the heat transfer liquid contracts due to heat, and the pressure of the elastic piece decreases. Under the action of the elastic force of the adjusting spring, the valve stem rebounds and expands upward. The gap between the plug head and the valve body decreases, the flow rate of the refrigerant passing through the gap decreases, and the refrigerant entering the evaporator decreases, preventing too much refrigerant from entering the evaporator and causing a liquid hammer phenomenon.

[0022] Furthermore, the compensation assembly includes a lower push plate. A force transmission rod is installed on the lower push plate, and a force transmission plate is installed at the bottom end of the force transmission rod. An adjusting spring is provided between the lower push plate and the upper pressing plate. The lower push plate and the force transmission plate are slidably connected to the valve body.

[0023] Furthermore, an extrusion chamber is provided between the elastic piece and the valve body. The extrusion chamber is communicated with the temperature sensing bulb through a pipeline. The temperature sensing bulb is filled with a heat transfer liquid. A compensation chamber is provided in the valve body. The compensation chamber is located at the bottom end of the force transmission plate. The compensation chamber is communicated with the compression passage through a pipeline. The compression passage, the compensation chamber, and the pipeline connecting the compression passage and the compensation chamber are all filled with a compression medium.

[0024] Compared with the prior art, the beneficial effects of the present invention are: 1. Utilizing the principle that the impact of the vaporized refrigerant on the detection blade is relatively small, the detection blade remains stable during normal operation and does not generate an electrical signal, thereby achieving the monitoring purpose of confirming that the chiller is operating in a predetermined state.

[0025] 2. When the expansion valve delivers an excessive amount of refrigerant, causing liquid refrigerant to flow out of the evaporator, the impact force of the liquid refrigerant on the detection blade is utilized to trigger the rotation of the detection blade. The centrifugal force generated by the rotation of the detection blade is converted into the displacement of the piston head, and then the detection spring and the compression medium are compressed.

[0026] 3. The compression amount of the detection spring is converted into the electric charge amount of the piezoelectric ceramic. When the intensity of the electrical signal exceeds the warning value, the control system automatically shuts down the chiller and issues an alarm to prevent the liquid hammer phenomenon from occurring, achieving the purpose of emergency protection for the chiller.

[0027] 4. The refrigerant flow rate is controlled by an expansion valve to maintain a constant heat at the outlet of the evaporator. When the expansion valve is improperly adjusted, the impact of the liquid refrigerant on the detection blade is converted into the displacement of the piston head. The piston head is used to press the compression medium into the compensation chamber, so that the compensation assembly pushes the valve stem to displace, reducing the gap between the plugging head and the valve body, achieving the purpose of secondary compensation adjustment of the refrigerant amount of the expansion valve, avoiding excessive outflow of the liquid refrigerant, and precluding the risk of liquid hammer generated by the compressor in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the overall three-dimensional view of the chiller of the present invention; Figure 2 is the three-dimensional Figure 1 ; Figure 3 is the three-dimensional Figure 2 ; Figure 4 is the three-dimensional view of the expansion valve and the detection and compensation device of the present invention; Figure 5 is the three-dimensional Figure 1 ; Figure 6 is the three-dimensional Figure 2 ; Figure 7 is the three-dimensional view of the detection compensator of the present invention; Figure 8 is the three-dimensional view of the detection blade of the present invention; Figure 9 is the three-dimensional view of the rotating cylinder of the present invention; Figure 10 is the three-dimensional view of the conversion assembly of the present invention; Figure 11 is the three-dimensional view of the expansion valve of the present invention; Figure 12 is of the present invention Figure 11 partial enlarged view of area A.

[0029] In the figure: 1, chassis; 2, water tank; 3, compressor; 4, condenser; 5, evaporator; 6, expansion valve; 7, detection and compensation device; 8, water pump; 71, housing; 72, bracket; 73, detection vane; 74, conversion component; 75, detection compensator; 76, rotating cylinder; 77, bearing; 751, columnar housing; 752, piston head; 753, push rod; 754, detection spring; 755, force transmission piece; 756, piezoelectric ceramic; 7511, compression chamber; 721, compression passage; 731, sliding strip; 741, transmission frame; 742, transmission rod; 743, gravity slider; 761, first chute; 61, valve body; 62, elastic piece; 63, compensation component; 64, valve rod; 65, adjusting spring; 66, inlet; 67, outlet; 68, upper pressing plate; 631, lower pushing plate; 632, force transmission rod; 633, force transmission plate; 611, extrusion chamber; 612, compensation chamber; 641, plugging head. Detailed implementation manner

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figures 1-12 shown, the present invention provides a technical solution for a water chiller with an intelligent adjustment function: including a chassis 1, a water tank 2, a condenser 4, an evaporator 5, a compressor 3 and a water pump 8 are respectively installed in the chassis 1. The water tank 2 is connected to the water pump 8 through a pipeline, the water pump 8 is connected to the condenser 4 through a pipeline, the compressor 3 is connected to the condenser 4 through a pipeline, the condenser 4 is connected to the evaporator 5 through a pipeline, an expansion valve 6 is installed on the pipeline between the condenser 4 and the evaporator 5, the evaporator 5 is connected to the compressor 3 through a pipeline, the expansion valve 6 is externally connected to a temperature sensing bulb through a pipeline, the temperature sensing bulb is installed on the pipeline at the outlet 67 end of the evaporator 5, a detection and compensation device 7 is installed on the pipeline at the inlet end of the compressor 3, and the detection and compensation device 7 is connected to the expansion valve 6 through a pipeline. A control system is provided in the water chiller, and the control system is used to control the entire water chiller.

[0032] The expansion valve 6 includes a valve body 61, on which an inlet 66 and an outlet 67 are respectively provided. The inlet 66 is connected to the condenser 4 through a pipeline, and the outlet 67 is connected to the evaporator 5 through a pipeline. A shrapnel 62 is installed inside the valve body 61, a valve rod 64 is slidably installed inside the valve body 61, a plugging head 641 is provided on the valve rod 64, an upper pressure plate 68 is installed at the bottom end of the valve rod 64, a compensation assembly 63 is slidably installed inside the valve body 61, and an adjusting spring 65 is installed between the compensation assembly 63 and the upper pressure plate 68. The valve body 61 is connected to the compression orifice 721 through a pipeline, and the valve body 61 is connected to the inside of the temperature sensing bulb through a pipeline.

[0033] The compensation assembly 63 includes a lower push plate 631, a force transmission rod 632 is installed on the lower push plate 631, a force transmission plate 633 is installed at the bottom end of the force transmission rod 632, an adjusting spring 65 is provided between the lower push plate 631 and the upper pressure plate 68, and the lower push plate 631 and the force transmission plate 633 are slidably connected to the valve body 61.

[0034] An extrusion chamber 611 is provided between the shrapnel 62 and the valve body 61. The extrusion chamber 611 is connected to the temperature sensing bulb through a pipeline. A heat transfer liquid is provided inside the temperature sensing bulb. A compensation chamber 612 is provided inside the valve body 61. The compensation chamber 612 is located at the bottom end of the force transmission plate 633. The compensation chamber 612 is connected to the compression orifice 721 through a pipeline. Compressed medium is filled in the compression orifice 721, the compensation chamber 612, and the pipeline connecting the compression orifice 721 and the compensation chamber 612.

[0035] The detection and compensation device 7 includes a housing 71, pipelines are connected to both ends of the housing 71. A bracket 72 is installed inside the housing 71, a detection compensator 75 is installed on the bracket 72, a bearing 77 is installed on the detection compensator 75, a rotating cylinder 76 is installed on the bearing 77, a number of detection vanes 73 are installed on the rotating cylinder 76, a conversion assembly 74 is slidably installed on the rotating cylinder 76, the conversion assembly 74 is slidably connected to the detection vanes 73, the conversion assembly 74 is connected to the detection compensator 75, and the housing 71 is connected to the expansion valve 6 through a pipeline.

[0036] The detection compensator 75 includes a columnar housing 751, the columnar housing 751 is installed on the bracket 72, the columnar housing 751 is connected to the bracket 72, a bearing 77 is installed on the columnar housing 751, a piston head 752 is slidably installed inside the columnar housing 751, a push rod 753 is rotatably installed on the piston head 752, the push rod 753 is connected to the conversion assembly 74, a piezoelectric ceramic 756 is installed inside the columnar housing 751, a force transmission sheet 755 is slidably installed inside the columnar housing 751, the force transmission sheet 755 is attached to the piezoelectric ceramic 756, and a detection spring 754 is installed between the force transmission sheet 755 and the piston head 752.

[0037] A compression chamber 7511 is formed among the cylindrical shell 751, the force transmission piece 755 and the piston head 752. The compression chamber 7511 is filled with a compression medium. A compression duct 721 is provided on the bracket 72. The compression duct 721 penetrates through the housing 71 and the cylindrical shell 751. One end of the compression duct 721 communicates with the compression chamber 7511, and the other end of the compression duct 721 is connected to the expansion valve 6 through a pipeline.

[0038] The conversion assembly 74 includes a transmission frame 741, a transmission rod 742 and a gravity slider 743. A sliding bar 731 is provided on the detection blade 73. A second sliding groove is provided on the sliding bar 731. The gravity slider 743 is slidably installed in the second sliding groove. A plurality of first sliding grooves 761 are provided on the rotating cylinder 76. The transmission frame 741 is slidably installed in the first sliding grooves 761. One end of the transmission rod 742 is rotatably connected to the transmission frame 741, and the other end of the transmission rod 742 is rotatably connected to the gravity slider 743. The transmission frame 741 is connected to the push rod 753.

[0039] The working principle of the present invention: The compressor 3 compresses the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gas, and transports it to the condenser 4 through a pipeline. The refrigerant exchanges heat with the cooling water and condenses into a liquid by releasing heat; then, the liquid refrigerant enters the evaporator 5 after throttling and depressurizing through the expansion valve 6, absorbs heat under the action of the evaporator 5 to complete vaporization, and finally returns to the compressor 3 to complete the refrigerant cycle. The water pump 8 extracts the cooling water from the water tank 2 and sends the cooling water into the condenser 4 to help the refrigerant dissipate heat; after heat exchange, the water with increased temperature flows back to the water tank 2 through a pipeline, and is pumped back by the water pump 8 again after heat dissipation or cooling to complete the cooling water cycle. The water pump 8 extracts a part of the water through shunt control and sends it into the evaporator 5. In the evaporator 5, the water exchanges heat with the low-temperature and low-pressure refrigerant. The refrigerant absorbs the heat in the water and vaporizes, and the water temperature drops to become chilled water. The chilled water after being cooled by the evaporator 5 is then transported to an external device through a pipeline to absorb the heat generated by the device to achieve a cooling effect. The used water then flows back to the water tank 2, and the whole cycle is continuously repeated. The refrigerant cycle and the water cycle work together, enabling the chiller to efficiently transfer the circulating heat of the refrigerant and maintain a stable supply of the cooling water, thereby achieving the overall refrigeration effect.

[0040] The refrigerant enters the inlet 66 through a pipeline from the condenser 4, flows into the valve body 61 from the inlet 66, enters the outlet 67 from the gap between the valve body 61 and the plug 641, and then enters the evaporator 5 through a pipeline. When the temperature rises, the heat transfer liquid expands due to heat, and the heat transfer liquid enters the extrusion chamber 611 through a pipeline and exerts extrusion on the elastic piece 62. The elastic piece 62 squeezes the valve stem 64 downward, the valve stem 64 moves downward and squeezes the adjusting spring 65 through the upper pressing plate 68. The plug 641 on the valve stem 64 moves downward with the valve stem 64, and the gap between the plug 641 and the valve body 61 increases. The flow rate of the refrigerant passing through the gap increases, and the refrigerant entering the evaporator 5 increases, thereby cooling the evaporator 5. When the temperature drops, the heat transfer liquid contracts due to heat, the pressure of the elastic piece 62 decreases, and under the elastic force of the adjusting spring 65, the valve stem 64 rebounds and expands upward. The gap between the plug 641 and the valve body 61 decreases, the flow rate of the refrigerant passing through the gap decreases, and the refrigerant entering the evaporator 5 decreases, preventing too much refrigerant from entering the evaporator 5 and causing a liquid hammer phenomenon.

[0041] When the refrigerant in the evaporator 5 flows back to the compressor 3 through a pipeline, it will first pass through the detection and compensation device 7. Under normal conditions, the vaporized refrigerant enters from the bottom of the housing 71, then passes upward through the detection blade 73 and flows out from the top of the housing 71. Since the impact of the vaporized refrigerant on the detection blade 73 is small, the detection blade 73 does not deflect; When the expansion valve 6 is adjusted improperly and too much refrigerant is delivered to the evaporator 5, liquid refrigerant will flow out of the evaporator 5. At this time, due to the large impact of the liquid refrigerant on the detection blade 73, under the action of the impact force, the detection blade 73 drives the rotating cylinder 76 to rotate on the bearing 77. The rotation generates centrifugal force, and under the action of the centrifugal force, the gravity slider 743 slides along the second chute on the sliding bar 731 towards the outer edge of the detection blade 73. The gravity slider 743 pulls the transmission frame 741 to slide downward and contract along the first chute 761 through the transmission rod 742. The transmission frame 741 rotates with the rotating cylinder 76 and drives the push rod 753 to move downward. The push rod 753 rotates while pushing the piston head 752 downward. Since the piston head 752 is rotatably connected to the push rod 753 and the piston head 752 is slidably connected to the column shell 751 and cannot rotate, the piston head 752 only slides downward along the column shell 751, and the piston head 752 squeezes the detection spring 754 and the compression medium in the compression chamber 7511 downward.

[0042] After the detection spring 754 is compressed, it squeezes the force transmission piece 755 downward, and the force transmission piece 755 squeezes the piezoelectric ceramic 756. After the piezoelectric ceramic 756 is compressed, it generates electric charges, and the electric signals are transmitted to the control system through wires. The control system judges the flow rate of the liquid refrigerant according to the strength of the electric signals. When the flow rate of the liquid refrigerant is too large and the strength of the electric signals exceeds the warning value, the control system shuts down the chiller urgently and issues an alarm to the staff to avoid too much liquid refrigerant entering the compressor 3 and causing a liquid hammer to damage the compressor 3.

[0043] After the compressed medium is squeezed, it enters the compensation chamber 612 from the compression chamber 7511 through the compression channel 721 and the pipeline. The pressure in the compensation chamber 612 increases. After the force transmission plate 633 is pressed, it squeezes the lower push plate 631 upward through the force transmission rod 632. The lower push plate 631 squeezes the adjusting spring 65. After the adjusting spring 65 is compressed, its elastic force increases. After the lower push plate 631 receives the increased elastic force, it pushes the valve rod 64 upward. The plugging head 641 on the valve rod 64 moves upward, and the gap between the plugging head 641 and the valve body 61 decreases. The flow rate of the refrigerant passing through the gap decreases, and the flow rate of the refrigerant entering the evaporator 5 decreases, achieving the purpose of secondary compensation adjustment of the refrigerant amount of the expansion valve 6 and avoiding the liquid hammer phenomenon.

[0044] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

Claims

1. A chiller with intelligent adjustment function, characterized in that: The chiller includes a chassis (1), inside which a water tank (2), a condenser (4), an evaporator (5), a compressor (3) and a water pump (8) are respectively installed. The water tank (2) is communicated with the water pump (8) through a pipeline. The water pump (8) is connected with the condenser (4) through a pipeline. The compressor (3) is communicated with the condenser (4) through a pipeline. The condenser (4) is communicated with the evaporator (5) through a pipeline. An expansion valve (6) is installed on the pipeline between the condenser (4) and the evaporator (5). The evaporator (5) is communicated with the compressor (3) through a pipeline. The expansion valve (6) is externally connected with a temperature sensing bulb through a pipeline. The temperature sensing bulb is installed on the pipeline at the outlet (67) end of the evaporator (5). A detection and compensation device (7) is installed on the pipeline at the inlet end of the compressor (3). The detection and compensation device (7) is communicated with the expansion valve (6) through a pipeline.

2. The chiller with an intelligent adjustment function according to claim 1, characterized in that: The detection and compensation device (7) includes a housing (71). Both ends of the housing (71) are communicated with pipelines. A bracket (72) is installed inside the housing (71). A detection and compensator (75) is installed on the bracket (72). A bearing (77) is installed on the detection and compensator (75). A rotating cylinder (76) is installed on the bearing (77). A plurality of detection blades (73) are installed on the rotating cylinder (76). A conversion component (74) is slidably installed on the rotating cylinder (76). The conversion component (74) is slidably connected with the detection blades (73). The conversion component (74) is connected with the detection and compensator (75). The housing (71) is communicated with the expansion valve (6) through a pipeline.

3. The chiller with intelligent adjustment function according to claim 2, characterized in that: The detection and compensator (75) includes a columnar housing (751). The columnar housing (751) is installed on the bracket (72). The columnar housing (751) is communicated with the bracket (72). A bearing (77) is installed on the columnar housing (751). A piston head (752) is slidably installed inside the columnar housing (751). A push rod (753) is rotatably installed on the piston head (752). The push rod (753) is connected with the conversion component (74). A piezoelectric ceramic (756) is installed inside the columnar housing (751). A force transmission plate (755) is slidably installed inside the columnar housing (751). The force transmission plate (755) is attached to the piezoelectric ceramic (756). A detection spring (754) is installed between the force transmission plate (755) and the piston head (752).

4. The chiller with an intelligent adjustment function according to claim 3, characterized in that: A compression chamber (7511) is formed among the columnar housing (751), the force transmission plate (755) and the piston head (752). The compression chamber (7511) is filled with a compression medium. A compression hole (721) is provided on the bracket (72). The compression hole (721) penetrates through the housing (71) and the columnar housing (751). One end of the compression hole (721) is communicated with the compression chamber (7511). The other end of the compression hole (721) is communicated with the expansion valve (6) through a pipeline.

5. The chiller with an intelligent adjustment function according to claim 3, characterized in that: The conversion component (74) includes a transmission frame (741), a transmission rod (742) and a gravity slider (743). A sliding bar (731) is provided on the detection blade (73). A second chute is provided on the sliding bar (731). The gravity slider (743) is slidably installed in the second chute. A plurality of first chutes (761) are provided on the rotating cylinder (76). The transmission frame (741) is slidably installed in the first chute (761). One end of the transmission rod (742) is rotatably connected to the transmission frame (741), and the other end of the transmission rod (742) is rotatably connected to the gravity slider (743). The transmission frame (741) is connected to the push rod (753).

6. The chiller with an intelligent adjustment function according to claim 4, characterized in that: The expansion valve (6) includes a valve body (61). An inlet (66) and an outlet (67) are respectively provided on the valve body (61). The inlet (66) is communicated with the condenser (4) through a pipeline. The outlet (67) is communicated with the evaporator (5) through a pipeline. A shrapnel (62) is installed in the valve body (61). A valve rod (64) is slidably installed in the valve body (61). A sealing head (641) is provided on the valve rod (64). An upper pressure plate (68) is installed at the bottom end of the valve rod (64). A compensation component (63) is slidably installed in the valve body (61). An adjusting spring (65) is installed between the compensation component (63) and the upper pressure plate (68). The valve body (61) is communicated with the compression orifice (721) through a pipeline. The valve body (61) is communicated with the interior of the temperature sensing bulb through a pipeline.

7. The chiller with an intelligent adjustment function according to claim 6, wherein: The compensation component (63) includes a lower push plate (631). A force transmission rod (632) is installed on the lower push plate (631). A force transmission plate (633) is installed at the bottom end of the force transmission rod (632). An adjusting spring (65) is provided between the lower push plate (631) and the upper pressure plate (68). The lower push plate (631) and the force transmission plate (633) are slidably connected to the valve body (61).

8. The chiller with intelligent adjustment function according to claim 7, wherein: An extrusion chamber (611) is provided between the shrapnel (62) and the valve body (61). The extrusion chamber (611) is communicated with the temperature sensing bulb through a pipeline. A heat transfer liquid is provided in the temperature sensing bulb. A compensation chamber (612) is provided in the valve body (61). The compensation chamber (612) is located at the bottom end of the force transmission plate (633). The compensation chamber (612) is communicated with the compression orifice (721) through a pipeline. Compressed medium is filled in the compression orifice (721), the compensation chamber (612) and the pipeline connecting the compression orifice (721) and the compensation chamber (612).

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