Chiller with intelligent adjustment function

Abstract

The application discloses a cold water machine with intelligent adjusting function and relates to the technical field of cold water machines. The cold water machine comprises 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 the detection spring is converted into the charge amount of the piezoelectric ceramic. When the electric signal intensity exceeds the early warning value, the control system automatically stops the cold water machine and issues an alarm to prevent the liquid strike phenomenon from occurring, so that the purpose of emergency protection of the cold water machine is achieved. The expansion valve is used for controlling the refrigerant flow, and the constant heat of the evaporator outlet is maintained. When the expansion valve is not adjusted properly, the impact of the liquid refrigerant on the detection blade is converted into the displacement of the piston head. The piston head is used for pressing the compression medium into the compensation chamber, so that the compensation assembly pushes the valve rod to displace, the gap between the plugging head and the valve body is reduced, the purpose of secondary compensation adjustment of the refrigerant amount of the expansion valve is achieved, and the risk of liquid strike of the compressor is avoided in advance.

Description

Technical Field

[0001] This invention relates to the field of chiller technology, specifically a chiller with intelligent adjustment function. Background Technology

[0002] Chillers, as core refrigeration equipment, continuously output low-temperature chilled water through thermodynamic principles such as mechanical compression and absorption. They are widely used in industrial manufacturing, commercial buildings, and precision environmental temperature control. In industrial production, chillers provide a stable cooling medium for processes such as injection molding, laser cutting, and semiconductor manufacturing. In daily life, they serve as the cold source for central air conditioning systems, driving terminal fan coil units or air handling units to achieve cooling. In addition, chillers also play a crucial role in emerging fields such as medical equipment cooling, data center thermal management, and thermal control of new energy batteries.

[0003] However, chillers often experience numerous problems and malfunctions during actual use, with liquid slugging being a significant concern due to its potentially harmful effects. Liquid slugging primarily occurs when liquid refrigerant fails to fully vaporize in the evaporator and instead enters the compressor in liquid form. During normal operation, the expansion valve regulates the refrigerant flow appropriately, ensuring that the liquid refrigerant entering the evaporator absorbs sufficient heat and completely vaporizes, forming a low-temperature, low-pressure gas. However, if the expansion valve is improperly adjusted (e.g., over-opening), or if evaporator heat exchange is insufficient, or if there are drastic load changes, some liquid refrigerant may not fully vaporize and may be carried into the compressor. Due to the incompressibility of liquids, this can cause a severe impact on the compressor during compression, resulting in mechanical components suffering instantaneous high-pressure shocks. This can lead to wear, deformation, or breakage, ultimately causing system failure and shutdown. Summary of the Invention

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

[0005] To achieve the above objectives, the present invention provides the following technical solution: a chiller with intelligent adjustment function, comprising a casing, wherein a water tank, a condenser, an evaporator, a compressor, and a water pump are respectively installed inside the casing. The water tank is connected to the water pump through a pipe, the water pump is connected to the condenser through a pipe, the compressor is connected to the condenser through a pipe, the condenser is connected to the evaporator through a pipe, an expansion valve is installed on the pipe between the condenser and the evaporator, the evaporator is connected to the compressor through a pipe, a temperature sensor is connected to the expansion valve through a pipe, the temperature sensor is installed on the pipe at the outlet end of the evaporator, and a detection and compensation device is installed on the pipe at the inlet end of the compressor, the detection and compensation device is connected to the expansion valve through a pipe.

[0006] The chiller is equipped with a control system, which is used to control the entire chiller.

[0007] The compressor compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, and then transports it through pipelines to the condenser. The refrigerant exchanges heat with the cooling water, releasing heat and condensing into a liquid. Next, the liquid refrigerant passes through the expansion valve to reduce its pressure and enters the evaporator. Under the action of the evaporator, it absorbs heat and completes vaporization, finally returning to the compressor to complete the refrigerant cycle.

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

[0009] The water pump, through a diversion control, draws a portion of the water and sends it to the evaporator. In the evaporator, the water exchanges heat with the low-temperature, low-pressure refrigerant. The refrigerant absorbs heat from the water and vaporizes, causing the water temperature to drop and become chilled water. The chilled water, cooled by the evaporator, is then piped to external equipment to absorb the heat generated by the equipment, achieving a cooling effect. The used water then flows back to the water tank, and the entire cycle repeats continuously.

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

[0011] Furthermore, the detection compensation device includes a housing with pipes connected to both ends. A support is installed inside the housing, a detection compensator is installed on the support, a bearing is installed on the detection compensator, a rotating cylinder is installed on the bearing, several detection blades 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 blades, the conversion component is connected to the detection compensator, and the housing is connected to an expansion valve through a pipe.

[0012] When the refrigerant in the evaporator flows back to the compressor through the pipes, it first passes through the detection and compensation device. Under normal conditions, the vaporized refrigerant enters from the bottom of the casing, then flows upward through the detection blades, and exits from the top of the casing. Because the vaporized refrigerant has a small impact on the detection blades, the detection blades do not deflect.

[0013] When the expansion valve is improperly adjusted and too much refrigerant is supplied 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 blade, the detection blade drives the rotating drum to rotate on the bearing under the impact force. The rotation generates centrifugal force. Under the action of centrifugal force, the gravity slider slides along the second sliding groove on the sliding bar towards the outer edge of the detection blade. The gravity slider pulls the transmission frame to slide downward along the first sliding groove and retracts through the transmission rod. The transmission frame follows the rotating drum and drives the push rod to move downward. The push rod rotates and pushes the piston head downward. Since the piston head is rotatably connected to the push rod and cannot rotate due to the sliding connection between the piston head and the cylindrical shell, the piston head only slides downward along the cylindrical shell. The piston head squeezes the detection spring and the compressed medium in the compression chamber downward.

[0014] Furthermore, the detection compensator includes a cylindrical shell, which is mounted on a bracket and connected to the bracket. A bearing is installed on the cylindrical shell, and a piston head is slidably installed inside the cylindrical shell. A push rod is rotatably installed on the piston head and connected to the conversion component. A piezoelectric ceramic is installed inside the cylindrical shell, and a force transmission plate is slidably installed inside the cylindrical shell. The force transmission plate is in contact with the piezoelectric ceramic, and a detection spring is installed between the force transmission plate and the piston head.

[0015] When the detection spring is compressed, it presses down on the force transmission plate, which in turn compresses the piezoelectric ceramic. The piezoelectric ceramic generates an electrical charge under pressure, and the electrical signal is transmitted to the control system through a wire. The control system determines the flow rate of the liquid refrigerant based on the strength of the electrical signal. When the flow rate of the liquid refrigerant is too high, the electrical signal strength exceeds the warning value, and the control system immediately shuts down the chiller and issues an alarm to the staff to prevent too much liquid refrigerant from entering the compressor, causing liquid slugging and damaging the compressor.

[0016] Furthermore, the cylindrical shell, the force transmission plate, and the piston head form a compression chamber, which is filled with a compression medium. The support is provided with a compression channel that passes through the shell and the cylindrical shell. One end of the compression channel is connected to the compression chamber, and the other end of the compression channel is connected to the expansion valve through a pipe.

[0017] After being compressed, the medium enters the compensation chamber from the compression chamber through the compression channel and pipeline. The pressure in the compensation chamber increases, and the force transmission plate, under pressure, pushes the push plate upward through the force transmission rod. The push plate then presses the adjusting spring, increasing its elasticity. The increased elasticity of the push plate pushes the valve stem upward, causing the sealing head on the valve stem to move upward. This reduces the gap between the sealing head and the valve body, decreasing the refrigerant flow through the gap and thus reducing the refrigerant flow into the evaporator. This achieves the purpose of secondary compensation and adjustment of the refrigerant charge in the expansion valve, avoiding liquid slugging.

[0018] Furthermore, the conversion assembly includes a transmission frame, a transmission rod, and a gravity slider. The detection blade is provided with a sliding strip, and the sliding strip is provided with a second sliding groove. The gravity slider is slidably installed in the second sliding groove. The rotating drum is provided with several first sliding grooves. The transmission frame is slidably installed in the first sliding grooves. One end of the transmission rod is rotatably connected to the transmission frame, and the other end of the transmission rod is rotatably connected to the gravity slider. The transmission frame is connected to the push rod.

[0019] Furthermore, the expansion valve includes a valve body with an inlet and an outlet. The inlet is connected to the condenser via a pipe, and the outlet is connected to the evaporator via a pipe. A spring is installed inside the valve body, and a valve stem is slidably installed inside the valve body. A sealing head is provided on the valve stem, and an upper pressure plate is installed at the bottom of the valve stem. A compensation component is slidably installed inside the valve body, and an adjusting spring is installed between the compensation component and the upper pressure plate. The valve body is connected to the compression channel via a pipe, and the valve body is connected to the inside of the temperature sensing bulb via a pipe.

[0020] The refrigerant enters the inlet from the condenser through a pipe, flows into the valve body from the inlet, enters the outlet through the gap between the valve body and the sealing head, and then enters the evaporator through a pipe.

[0021] When the temperature rises, the heat transfer liquid expands due to heat. The heat transfer liquid enters the compression chamber through the pipe and compresses the spring. The spring compresses the valve stem downward, and the valve stem moves down and compresses the adjusting spring through the upper pressure plate. The sealing head on the valve stem moves down with the valve stem, and the gap between the sealing head and the valve body increases. The flow rate of refrigerant through the gap increases, and more refrigerant enters the evaporator, thereby cooling the evaporator.

[0022] When the temperature decreases, the heat transfer liquid contracts due to heat, the pressure of the spring decreases, and under the action of the adjusting spring, the valve stem rebounds upward, reducing the gap between the sealing head and the valve body. This reduces the flow rate of refrigerant through the gap, thus reducing the amount of refrigerant entering the evaporator and preventing excessive refrigerant from entering the evaporator and causing liquid slugging.

[0023] Furthermore, the compensation component includes a push plate, a force transmission rod is mounted on the push plate, a force transmission plate is mounted at the bottom end of the force transmission rod, an adjusting spring is provided between the push plate and the upper pressure plate, and the push plate and the force transmission plate are slidably connected to the valve body.

[0024] Furthermore, a compression chamber is provided between the spring and the valve body. The compression chamber is connected to the temperature sensing bulb through a pipe. The temperature sensing bulb contains a heat transfer liquid. A compensation chamber is provided inside the valve body. The compensation chamber is located at the bottom of the force transmission plate. The compensation chamber is connected to the compression channel through a pipe. The compression channel, the compensation chamber, and the pipe connecting the compression channel and the compensation chamber are all filled with a compression medium.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. Utilizing the principle that vaporized refrigerant has minimal impact on the detection blades, the detection blades remain stable during normal operation and do not generate electrical signals, thereby achieving the monitoring purpose of confirming that the chiller is working in a predetermined state.

[0027] 2. When the expansion valve delivers excessive refrigerant, causing liquid refrigerant to flow out of the evaporator, the impact force of the liquid refrigerant on the detection blades triggers the rotation of the detection blades. The centrifugal force generated by the rotation of the detection blades is converted into the displacement of the piston head, which in turn compresses the detection spring and the compression medium.

[0028] 3. The compression of the detection spring is converted into the charge of the piezoelectric ceramic. When the electrical signal strength exceeds the warning value, the control system automatically shuts down the chiller and issues an alarm to prevent liquid slugging and achieve emergency protection for the chiller.

[0029] 4. The expansion valve is used to control the refrigerant flow and maintain a constant temperature at the evaporator outlet. When the expansion valve is not adjusted properly, 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 force the compressed medium into the compensation chamber, thereby causing the compensation component to push the valve stem to move, reducing the gap between the sealing head and the valve body. This achieves the purpose of secondary compensation and adjustment of the refrigerant charge in the expansion valve, avoiding excessive liquid refrigerant outflow and mitigating the risk of liquid slugging in the compressor. Attached Figure Description

[0030] Figure 1 This is a perspective view of the chiller of the present invention;

[0031] Figure 2 The three-dimensional chiller of the present invention Figure 1 ;

[0032] Figure 3 The three-dimensional chiller of the present invention Figure 2 ;

[0033] Figure 4 This is a perspective view of the expansion valve and detection compensation device of the present invention;

[0034] Figure 5 The three-dimensional representation of the detection compensation device of the present invention Figure 1 ;

[0035] Figure 6 The three-dimensional representation of the detection compensation device of the present invention Figure 2 ;

[0036] Figure 7 This is a perspective view of the compensator of the present invention;

[0037] Figure 8 This is a three-dimensional view of the blade being tested according to the present invention;

[0038] Figure 9This is a perspective view of the rotating drum of the present invention;

[0039] Figure 10 This is a perspective view of the conversion component of the present invention;

[0040] Figure 11 This is a perspective view of the expansion valve of the present invention;

[0041] Figure 12 For the present invention Figure 11 A magnified view of a portion of region A in the middle.

[0042] In the diagram: 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 blade; 74. Conversion assembly; 75. Detection compensator; 76. Rotary drum; 77. Bearing; 751. Column housing; 752. Piston head; 753. Push rod; 754. Detection spring; 755. Force transmission plate; 756. Piezoelectric ceramic; 7511. Compression chamber 721. Compression channel; 731. Sliding bar; 741. Transmission frame; 742. Transmission rod; 743. Gravity slider; 761. First slide groove; 61. Valve body; 62. Spring; 63. Compensation assembly; 64. Valve stem; 65. Adjusting spring; 66. Inlet; 67. Outlet; 68. Upper pressure plate; 631. Lower push plate; 632. Force transmission rod; 633. Force transmission plate; 611. Compression chamber; 612. Compensation chamber; 641. Sealing head. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] like Figures 1-12 As shown, this invention provides a chiller technical solution with intelligent adjustment function: It includes a casing 1, within 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 connected to the water pump 8 via a pipe, the water pump 8 is connected to the condenser 4 via a pipe, the compressor 3 is connected to the condenser 4 via a pipe, the condenser 4 is connected to the evaporator 5 via a pipe, an expansion valve 6 is installed on the pipe between the condenser 4 and the evaporator 5, the evaporator 5 is connected to the compressor 3 via a pipe, and a temperature sensor is connected to the expansion valve 6 via a pipe. The temperature sensor is installed on the pipe at the outlet 67 end of the evaporator 5, and a detection and compensation device 7 is installed on the pipe at the inlet end of the compressor 3, connected to the expansion valve 6 via a pipe. The chiller has a control system for controlling the entire chiller.

[0045] The expansion valve 6 includes a valve body 61, with an inlet 66 and an outlet 67. The inlet 66 is connected to the condenser 4 via a pipe, and the outlet 67 is connected to the evaporator 5 via a pipe. A spring 62 is installed inside the valve body 61. A valve stem 64 is slidably installed inside the valve body 61. A sealing head 641 is provided on the valve stem 64. An upper pressure plate 68 is installed at the bottom of the valve stem 64. A compensation component 63 is slidably installed inside 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 connected to the compression channel 721 via a pipe and to the inside of the temperature sensing bulb via a pipe.

[0046] The compensation component 63 includes a push plate 631, a force transmission rod 632 is mounted on the push plate 631, a force transmission plate 633 is mounted at the bottom end of the force transmission rod 632, an adjusting spring 65 is provided between the push plate 631 and the upper pressure plate 68, and the push plate 631 and the force transmission plate 633 are slidably connected to the valve body 61.

[0047] A compression chamber 611 is provided between the spring 62 and the valve body 61. The compression chamber 611 is connected to the temperature sensing bulb through a pipe. The temperature sensing bulb contains a heat transfer liquid. A compensation chamber 612 is provided inside the valve body 61. The compensation chamber 612 is located at the bottom of the force transmission plate 633. The compensation chamber 612 is connected to the compression channel 721 through a pipe. The compression channel 721, the compensation chamber 612, and the pipe connecting the compression channel 721 and the compensation chamber 612 are all filled with a compression medium.

[0048] The detection compensation device 7 includes a housing 71, with pipes connected to both ends of the housing 71. A bracket 72 is installed inside the housing 71, and a detection compensator 75 is installed on the bracket 72. A bearing 77 is installed on the detection compensator 75, and a rotating drum 76 is installed on the bearing 77. Several detection blades 73 are installed on the rotating drum 76, and a conversion component 74 is slidably installed on the rotating drum 76. The conversion component 74 is slidably connected to the detection blades 73 and is connected to the detection compensator 75. The housing 71 is connected to the expansion valve 6 through pipes.

[0049] The detection compensator 75 includes a cylindrical shell 751, which is mounted on a bracket 72 and is connected to the bracket 72. A bearing 77 is installed on the cylindrical shell 751. A piston head 752 is slidably installed inside the cylindrical shell 751. A push rod 753 is rotatably installed on the piston head 752 and is connected to the conversion component 74. A piezoelectric ceramic 756 is installed inside the cylindrical shell 751. A force transmission plate 755 is slidably installed inside the cylindrical shell 751 and is in contact with the piezoelectric ceramic 756. A detection spring 754 is installed between the force transmission plate 755 and the piston head 752.

[0050] The cylindrical shell 751, the force transmission plate 755 and the piston head 752 form a compression chamber 7511, which is filled with a compression medium. The support 72 is provided with a compression channel 721, which passes through the housing 71 and the cylindrical shell 751. One end of the compression channel 721 is connected to the compression chamber 7511, and the other end of the compression channel 721 is connected to the expansion valve 6 through a pipe.

[0051] The conversion assembly 74 includes a transmission frame 741, a transmission rod 742, and a gravity slider 743. The detection blade 73 is provided with a sliding strip 731, and the sliding strip 731 is provided with a second sliding groove. The gravity slider 743 is slidably installed in the second sliding groove. The rotating cylinder 76 is provided with a plurality of first sliding grooves 761. 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.

[0052] The working principle of this invention is as follows: Compressor 3 compresses low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas, and transports it through pipelines to condenser 4. The refrigerant exchanges heat with cooling water, releasing heat and condensing into a liquid. Then, the liquid refrigerant passes through expansion valve 6 for throttling and pressure reduction before entering evaporator 5. In evaporator 5, it absorbs heat and vaporizes, finally returning to compressor 3, completing the refrigerant cycle. Water pump 8 draws cooling water from water tank 2 and sends it to condenser 4 to help dissipate heat from the refrigerant. After heat exchange, the heated water flows back to water tank 2 through pipelines, and after further cooling, it is drawn back by water pump 8, completing the cooling water cycle. Water pump 8, through flow control, draws a portion of water and sends it to evaporator 5. In evaporator 5, the water exchanges heat with low-temperature, low-pressure refrigerant, absorbing heat from the water and vaporizing. The water temperature drops, becoming chilled water. The chilled water, cooled by evaporator 5, is then transported through pipelines to external equipment to absorb heat generated by the equipment, achieving a cooling effect. Used water flows back to water tank 2, and the entire cycle repeats continuously. The refrigerant cycle and water cycle work together, enabling the chiller to efficiently transfer the circulating heat of the refrigerant while maintaining a stable supply of cooling water, thereby achieving an overall cooling effect.

[0053] Refrigerant enters from the condenser 4 through a pipe into inlet 66, flows from inlet 66 into valve body 61, enters outlet 67 through the gap between valve body 61 and sealing head 641, and then enters evaporator 5 through a pipe. When the temperature rises, the heat transfer liquid expands due to heat and enters the compression chamber 611 through the pipe, compressing the spring 62. The spring 62 compresses the valve stem 64 downward, and the valve stem 64 moves down and compresses the adjusting spring 65 through the upper pressure plate 68. The sealing head 641 on the valve stem 64 moves down with the valve stem 64, increasing the gap between the sealing head 641 and valve body 61. This increases the flow rate of refrigerant through the gap, resulting in more refrigerant entering evaporator 5, thereby cooling evaporator 5. When the temperature decreases, the heat transfer liquid contracts due to heat, the pressure of the spring 62 decreases, and under the action of the adjusting spring 65, the valve stem 64 springs back upward, reducing the gap between the sealing head 641 and the valve body 61. This reduces the flow rate of refrigerant through the gap, thus reducing the amount of refrigerant entering the evaporator 5 and preventing excessive refrigerant from entering the evaporator 5 and causing liquid slugging.

[0054] When the refrigerant in the evaporator 5 flows back to the compressor 3 through the pipe, it first passes through the detection compensation device 7. Under normal conditions, the vaporized refrigerant enters from the bottom of the housing 71, then flows upward through the detection blade 73, and flows out from the top of the housing 71. Because the vaporized refrigerant has a small impact on the detection blade 73, the detection blade 73 does not deflect.

[0055] When the expansion valve 6 is improperly adjusted and too much refrigerant is supplied 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, the detection blade 73 drives the rotating drum 76 to rotate on the bearing 77 under the impact force. The rotation generates centrifugal force. Under the action of centrifugal force, the gravity slider 743 slides along the second sliding groove 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 and retract downward along the first sliding groove 761 through the transmission rod 742. The transmission frame 741 follows the rotating drum 76 to rotate and drives the push rod 753 to move downward. The push rod 753 pushes the piston head 752 downward while rotating. Since the piston head 752 is rotatably connected to the push rod 753 and cannot rotate due to the sliding connection between the piston head 752 and the cylindrical shell 751, the piston head 752 only slides downward along the cylindrical shell 751. The piston head 752 squeezes the detection spring 754 and the compressed medium in the compression chamber 7511 downward.

[0056] When the detection spring 754 is compressed, it presses down on the force transmission plate 755. The force transmission plate 755 compresses the piezoelectric ceramic 756. The piezoelectric ceramic 756 generates an electric charge after being compressed, and the electrical signal is transmitted to the control system through the wire. The control system judges the flow rate of liquid refrigerant based on the strength of the electrical signal. When the flow rate of liquid refrigerant is too large, the electrical signal strength exceeds the warning value. The control system shuts down the chiller in an emergency and issues an alarm to the staff to prevent too much liquid refrigerant from entering the compressor 3, causing liquid slugging and damaging the compressor 3.

[0057] After being compressed, the compressed medium enters the compensation chamber 612 through the compression channel 721 and the pipeline from the compression chamber 7511. The pressure in the compensation chamber 612 increases, and the force transmission plate 633, under pressure, pushes the push plate 631 upward through the force transmission rod 632. The push plate 631 then presses the adjusting spring 65. The adjusting spring 65, under pressure, increases its elasticity. The push plate 631, under the increased elasticity, pushes the valve stem 64 upward. The sealing head 641 on the valve stem 64 moves upward, and the gap between the sealing head 641 and the valve body 61 decreases. The flow rate of refrigerant through the gap decreases, and the flow rate of refrigerant entering the evaporator 5 decreases. This achieves the purpose of secondary compensation and adjustment of the refrigerant charge in the expansion valve 6, avoiding liquid slugging.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A chiller with intelligent adjustment function, characterized in that: The chiller includes a casing (1) and a detection and compensation device (7). The casing (1) is equipped with a water tank (2), a condenser (4), an evaporator (5), a compressor (3), and a water pump (8). The water tank (2) is connected to the water pump (8) through a pipe. The water pump (8) is connected to the condenser (4) through a pipe. The compressor (3) is connected to the condenser (4) through a pipe. The condenser (4) is connected to the evaporator (5) through a pipe. An expansion valve (6) is installed on the pipe between the condenser (4) and the evaporator (5). The evaporator (5) is connected to the compressor (3) through a pipe. The expansion valve (6) is connected to a temperature sensor through a pipe. The temperature sensor is installed on the pipe at the outlet (67) of the evaporator (5). The bottom inlet of the detection and compensation device (7) is connected to the evaporator (5) through a pipe. The top outlet of the detection and compensation device (7) is connected to the compressor (3) through a pipe. The detection and compensation device (7) is connected to the expansion valve (6) through a pipe. The detection compensation device (7) includes a housing (71), with pipes connected to both ends of the housing (71). A bracket (72) is installed inside the housing (71), and a detection compensator (75) is installed on the bracket (72). A bearing (77) is installed on the detection compensator (75), and a rotating drum (76) is installed on the bearing (77). Several detection blades (73) are installed on the rotating drum (76), and a conversion component (74) is slidably installed on the rotating drum (76). The conversion component (74) is slidably connected to the detection blades (73), and the conversion component (74) is connected to the detection compensator (75). The detection compensator (75) includes a cylindrical shell (751), on which a bearing (77) is installed. A piston head (752) is slidably installed inside the cylindrical shell (751), and a push rod (753) is rotatably installed on the piston head (752). The push rod (753) is connected to the conversion assembly (74). A force transmission plate (755) is slidably installed inside the cylindrical shell (751). The centrifugal force generated when the detection blade (73) rotates can drive the push rod (753) to move downward through the conversion assembly (74). The cylindrical shell (751), the force transmission plate (755), and the piston head (752) form a compression chamber (7511), which is filled with a compression medium. The support (72) is provided with a compression channel (721), which penetrates the shell (71) and the cylindrical shell (751). One end of the compression channel (721) is connected to the compression chamber (7511). 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 pipe, and the outlet (67) is connected to the evaporator (5) through a pipe. A spring plate (62) is installed inside the valve body (61), and a valve stem (64) is slidably installed inside the valve body (61). A sealing head (641) is provided on the valve stem (64), and a sealing head (641) is installed at the bottom end of the valve stem (64). The upper pressure plate (68) has a compensation component (63) slidably installed inside 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 connected to the compression channel (721) through a pipe. The valve body (61) is connected to the inside of the temperature sensing bulb through a pipe. The valve body (61) has a compensation chamber (612) inside. The other end of the compression channel (721) is connected to the compensation chamber (612) through a pipe. The compensation component (63) includes a push plate (631), a force transmission rod (632) is mounted on the push plate (631), a force transmission plate (633) is mounted at the bottom end of the force transmission rod (632), an adjusting spring (65) is provided between the push plate (631) and the upper pressure plate (68), and the push plate (631) and the force transmission plate (633) are slidably connected to the valve body (61).

2. A chiller with intelligent adjustment function according to claim 1, characterized in that: The cylindrical shell (751) is mounted on the bracket (72), and the cylindrical shell (751) is connected to the bracket (72). A piezoelectric ceramic (756) is installed inside the cylindrical shell (751), and 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).

3. A chiller with intelligent adjustment function according to claim 2, characterized in that: The conversion component (74) includes a transmission frame (741), a transmission rod (742), and a gravity slider (743). The detection blade (73) is provided with a sliding strip (731), and the sliding strip (731) is provided with a second sliding groove. The gravity slider (743) is slidably installed in the second sliding groove. The rotating cylinder (76) is provided with a plurality of first sliding grooves (761). 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).

4. A chiller with intelligent adjustment function according to claim 1, characterized in that: A compression chamber (611) is provided between the spring (62) and the valve body (61). The compression chamber (611) is connected to the temperature sensing bulb through a pipe. The temperature sensing bulb contains a heat transfer liquid. The compensation chamber (612) is located at the bottom of the force transmission plate (633). The compression channel (721), the compensation chamber (612), and the pipe connecting the compression channel (721) and the compensation chamber (612) are all filled with a compression medium.

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