Refrigerating system with refrigerant redundancy adjusting function

Abstract

The utility model provides a refrigerating system with a refrigerant redundancy adjusting function, which comprises a compressor, a liquid storage tank, a condenser, a first pipeline and a second pipeline, one end of the first pipeline is communicated with the condenser, the other end of the first pipeline is communicated with the inside of the liquid storage tank, so that the refrigerant subjected to heat exchange in the condenser can be guided into the liquid storage tank, and the second pipeline is communicated with the inside of the liquid storage tank. The liquid refrigerant in the liquid storage tank can be discharged to the second pipeline, the liquid discharging height of the liquid storage tank changes along with the frequency change of the compressor, the higher the frequency of the compressor is, the lower the liquid discharging height of the liquid storage tank is, and on the contrary, the lower the frequency of the compressor is, the higher the liquid discharging height of the liquid storage tank is. According to the fluorine pump compression refrigeration system, it can be guaranteed that enough refrigerant participates in refrigeration circulation of the system under high-frequency operation, less refrigerant enters the system to participate in circulation under low-frequency operation, and the problem of refrigerant redundancy caused by difference of refrigerant filling amounts needed under different operation conditions of the fluorine pump compression refrigeration system is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, and in particular to a refrigeration system with a refrigerant redundancy adjustment function. Background Art

[0002] With the extensive application of 4G and the gradual popularization of 5G, the heat generated by various data processing equipment is getting higher and higher, and data centers have higher and higher requirements for the cooling capacity and energy saving of air-conditioning equipment.

[0003] Using outdoor natural cold sources in transitional seasons and cold winters to cool the data center can significantly reduce the operating costs of air-conditioning equipment. A common method is to use fluorine pump air conditioners. In winter, the fluorine pump mode is enabled, the compressor is stopped, and the fluorine pump is used to drive the refrigerant to achieve heat pipe cooling operation, which greatly reduces the operating costs of the equipment.

[0004] The fluorine pump compression refrigeration system is a composite system. The fluorine pump heat pipe system and the compression refrigeration system share the evaporator and condenser, as well as some common refrigerant pipelines, system components, etc.

[0005] Since the heat load of the data center fluctuates with user usage and seasonal changes, more and more computer room air conditioners now use variable frequency technology to cope with the heat load fluctuations of the data center and ensure the constant temperature and humidity requirements of the data center. However, the change in the compressor frequency of the refrigeration system will cause the optimal refrigerant circulation volume to change. Generally, the higher the frequency, the greater the refrigerant circulation volume required. If the optimal refrigerant filling volume under 100% load is guaranteed during the design and development of the refrigeration system, then the optimal refrigerant filling volume under 75% or 50% or other low-frequency operation conditions is relatively small. Therefore, the refrigerant inside the unit may accumulate liquid under low-frequency conditions, and the accumulated liquid is retained at the bottom of the heat exchanger, which is not conducive to heat exchange.

[0006] Considering the liquid height requirement at the suction port of the fluorine pump in the fluorine pump mode, the required refrigerant filling amount is usually relatively large in the fluorine pump mode. Therefore, the fluorine pump compression refrigeration system is likely to form refrigerant liquid retention under actual operating conditions. It is necessary to consider migrating the retained refrigerant to the liquid storage tank, and in the high-frequency compression refrigeration mode, the refrigerant liquid retained in the liquid storage tank should be released as soon as possible to participate in the system circulation operation.

[0007] Since the fluorine pump compression refrigeration system in the prior art has technical problems such as refrigerant redundancy caused by the difference in the refrigerant filling amount required under different operating conditions, the utility model studies and designs a refrigeration system with a refrigerant redundancy adjustment function. Utility Model Content

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defect of refrigerant redundancy caused by the difference in the refrigerant filling amount required under different operating conditions in the compression refrigeration system in the prior art, thereby providing a refrigeration system with a refrigerant redundancy adjustment function.

[0009] In order to solve the above problems, the utility model provides a refrigeration system with a refrigerant redundancy adjustment function, which includes:

[0010] A compressor, a liquid storage tank, a condenser, a first pipeline and a second pipeline, one end of the first pipeline is connected to the condenser, and the other end is connected to the interior of the liquid storage tank, so that the refrigerant after heat exchange in the condenser can be introduced into the liquid storage tank, and the liquid refrigerant in the liquid storage tank can be discharged to the second pipeline. The discharge height of the liquid storage tank changes with the frequency of the compressor. The higher the frequency of the compressor, the lower the discharge height of the liquid storage tank. Conversely, the lower the frequency of the compressor, the higher the discharge height of the liquid storage tank.

[0011] In some embodiments,

[0012] It also includes an evaporator and a throttle valve, one end of the second pipeline is connected to the interior of the liquid storage tank, and the other end is connected to the evaporator, and the throttle valve is arranged on the second pipeline to guide the refrigerant in the liquid storage tank to the throttle valve;

[0013] The position where the first pipeline is connected to the liquid storage tank is located at the top of the liquid storage tank, and the other end of the first pipeline is penetrated downward from the top of the liquid storage tank into the liquid storage tank.

[0014] In some embodiments,

[0015] It also includes a hose, which is located inside the liquid storage tank. The lower end of the hose is connected to one end of the second pipeline. The upper end of the hose is located below the liquid level of the liquid storage tank or flush with the liquid level of the liquid storage tank. The upper end of the hose can introduce liquid in the liquid storage tank and guide it toward the second pipeline. The height of the upper end of the hose changes with the frequency of the compressor. The higher the frequency of the compressor, the lower the height of the upper end of the hose. Conversely, the lower the frequency of the compressor, the higher the height of the upper end of the hose.

[0016] In some embodiments,

[0017] The utility model also includes a pipe mouth sleeve and a rotating shaft. The upper pipe mouth of the hose is connected to the pipe mouth sleeve and can move up and down together with the pipe mouth sleeve. The rotating shaft and the pipe mouth sleeve are threadedly matched. A first external thread is also provided on the outer circumferential surface of the pipe mouth sleeve. A second external thread is provided on the outer circumferential surface of the rotating shaft. The first external thread and the second external thread form a threaded match, so that the pipe mouth sleeve can be driven to move up and down in the vertical direction by rotating the rotating shaft.

[0018] In some embodiments,

[0019] It also includes a positioning rod, the pipe mouth sleeve is arranged on the outer circumference of the positioning rod, the rotating shaft and the positioning rod both extend in the vertical direction, the projection of the outer circumference of the positioning rod on the horizontal plane is a non-circular structure, and the inner circumference of the pipe mouth sleeve matches the shape of the outer circumference of the positioning rod, so that the pipe mouth sleeve can only move along the axial direction of the positioning rod but cannot rotate around the positioning rod.

[0020] In some embodiments,

[0021] It also includes an electromagnetic coil, which is located outside the liquid storage tank. The rotating shaft extends in the vertical direction. The upper end or the lower end of the rotating shaft extends out of the liquid storage tank and is arranged opposite to the electromagnetic coil in the height direction, so that the rotating shaft is driven to rotate by the magnetic field generated by the power supply of the electromagnetic coil. A sealing tube is also sleeved on the outer periphery of one end of the rotating shaft extending out of the liquid storage tank, and the sealing tube is located on the inner periphery of the electromagnetic coil.

[0022] In some embodiments,

[0023] The utility model also includes a pipe mouth sleeve and a rotating shaft. The upper pipe mouth of the hose is connected to the pipe mouth sleeve and can move up and down integrally with the pipe mouth sleeve. The pipe mouth sleeve is arranged on the outer periphery of the rotating shaft. The rotating shaft and the pipe mouth sleeve are threadedly matched. A first internal thread is also arranged on the inner peripheral surface of the pipe mouth sleeve. A third external thread is arranged on the outer peripheral surface of the rotating shaft. The first internal thread and the third external thread form a threaded match, so as to drive the pipe mouth sleeve to move axially along the rotating shaft by rotating the rotating shaft.

[0024] In some embodiments,

[0025] It also includes a limit rod, one end of which is connected to the inner wall of the shell of the liquid storage tank, and the other end extends to connect with the outer peripheral wall of the pipe mouth sleeve. The other end of the limit rod can limit the rotation of the pipe mouth sleeve so that the pipe mouth sleeve can only move axially along the rotating shaft.

[0026] In some embodiments,

[0027] There are at least two limit rods, at least two limit rods are arranged at intervals along the circumferential direction of the liquid storage tank, and the lengths of at least two limit rods are unequal; the limit rods are connected to the nozzle sleeve to form an abutment or clamping connection to limit the rotation of the nozzle sleeve, the projection of the nozzle sleeve in the horizontal plane is a circular ring, the projection of the rotation axis in the horizontal plane is a circle, the center of the nozzle sleeve coincides with the center of the rotation axis, and the center of the rotation axis is eccentric to the center of the projection of the liquid storage tank in the horizontal plane;

[0028] A ball is also arranged at one end of the limiting rod connected to the inner wall of the shell of the liquid storage tank, so that the limiting rod is in rolling contact with the inner wall of the shell through the ball.

[0029] In some embodiments,

[0030] It also includes an electromagnetic coil, which is located outside the liquid storage tank. The rotating shaft extends in the vertical direction, and part of the structure of the rotating shaft extends upward or downward from the liquid storage tank and is arranged opposite to the electromagnetic coil in the height direction, so as to drive the rotating shaft to rotate through the magnetic field generated by the power supply of the electromagnetic coil; the other end of the rotating shaft is located inside the liquid storage tank and is provided with a bearing assembly, and a sealing tube is also sleeved on the outer periphery of the end of the rotating shaft extending out of the liquid storage tank, and the sealing tube is located on the inner periphery of the electromagnetic coil.

[0031] In some embodiments,

[0032] It also includes a sling and a rotating shaft. The upper end of the hose is connected to the lower end of the sling and can move up and down together with the sling. The upper end of the sling is connected to the rotating shaft, and the sling can be wound around the outer circumference of the rotating shaft. The length of the sling wound around the rotating shaft increases or decreases as the rotating shaft rotates, so that the upper end of the hose is driven to move up and down by rotating the rotating shaft.

[0033] In some embodiments,

[0034] It also includes an electromagnetic coil, which is located outside the liquid storage tank. The rotating shaft extends in a horizontal direction, and one end of the rotating shaft extends out of the liquid storage tank and is arranged opposite to the electromagnetic coil, so that the rotating shaft is driven to rotate by the magnetic field generated by energizing the electromagnetic coil. A bearing assembly is provided at the other end of the rotating shaft, and a sealing tube is also sleeved on the outer periphery of the end of the rotating shaft extending out of the liquid storage tank, and the sealing tube is located at the inner periphery of the electromagnetic coil.

[0035] In some embodiments,

[0036] It also includes a limiting rope, the upper end of which is connected to the lower end of the sling, and the lower end of which is fixedly connected to the inner bottom of the liquid storage tank. The limiting rope is a bendable structure, and the length of the limiting rope is less than the length of the hose.

[0037] In some embodiments,

[0038] Also includes a fourth pipeline and a fifth pipeline,

[0039] One end of the fourth pipeline is connected to the interior of the liquid storage tank through the first liquid outlet on the liquid storage tank, and the other end is connected to the second pipeline. One end of the fifth pipeline is connected to the interior of the liquid storage tank through the second liquid outlet on the liquid storage tank, and the other end is connected to the second pipeline. The height of the first liquid outlet is higher than the height of the second liquid outlet. When the frequency of the compressor is the first frequency, the fourth pipeline is opened and the fifth pipeline is closed. When the frequency of the compressor is the second frequency, the fifth pipeline is opened and the fourth pipeline is closed. The first frequency is less than the second frequency, and the first frequency and the second frequency are both preset frequency values.

[0040] In some embodiments,

[0041] One end of the second pipeline is connected to the interior of the liquid storage tank through a third liquid outlet on the liquid storage tank, and the height of the third liquid outlet is higher than that of the first liquid outlet.

[0042] The one-way valve A is disposed on the second pipeline and can only allow the fluid to flow from the liquid storage tank to the second pipeline.

[0043] The other end of the fourth pipeline is connected to a position on the second pipeline between the one-way valve A and the throttle valve, and the other end of the fifth pipeline is connected to a position on the second pipeline between the one-way valve A and the throttle valve.

[0044] The fourth pipeline is provided with a control valve C, and the fifth pipeline is provided with a control valve B.

[0045] In some embodiments,

[0046] The refrigeration system is a fluorine pump compression refrigeration system, which also includes a fluorine pump, a one-way valve A and a third pipeline. The one-way valve A is arranged on the second pipeline and can only allow fluid to flow out of the liquid storage tank to the second pipeline. One end of the third pipeline is connected to the inner bottom of the liquid storage tank, and the other end is connected to the position on the second pipeline located between the one-way valve A and the throttle valve. The fluorine pump is arranged on the third pipeline, and a control valve A is also arranged on the third pipeline.

[0047] The utility model also provides a control method for a refrigeration system with a refrigerant redundancy adjustment function as described above, which comprises:

[0048] A detection step, detecting the operating frequency of the compressor;

[0049] A determination step of determining whether the current frequency detection value of the compressor is increased or decreased relative to the previous frequency detection value thereof;

[0050] The control step comprises: when the current frequency detection value increases relative to the previous frequency detection value, controlling the height of the liquid discharge port of the liquid storage tank to decrease; and when the current frequency detection value decreases relative to the previous frequency detection value, controlling the height of the liquid discharge port of the liquid storage tank to increase.

[0051] The utility model provides a refrigeration system with a refrigerant redundancy adjustment function, which has the following features:

[0052] Beneficial effects:

[0053] 1. The utility model changes the discharge height of the liquid storage tank along with the frequency of the compressor. The higher the frequency of the compressor, the lower the discharge height of the liquid storage tank, and vice versa. When the frequency of the compressor is high, more refrigerant liquid in the liquid storage tank can be discharged to participate in the circulation of the system, so as to ensure that there is enough refrigerant amount to participate in the refrigeration cycle of the system under high-frequency operation and ensure normal refrigeration or heating effect. When the frequency of the compressor is low, relatively less refrigerant liquid is discharged from the liquid storage tank, so that less refrigerant amount enters the system to participate in the circulation under low-frequency operation, avoiding the situation where too much refrigerant enters the system and causes the refrigerant to be retained in the heat exchanger, affecting the heat exchange effect.

[0054] 2. The utility model designs a refrigerant outlet with adjustable height in the liquid storage tank, so that the refrigerant pipe mouth changes accordingly under different operating frequencies in the compression refrigeration mode, and then the amount of refrigerant liquid retained in the liquid storage tank changes, thereby ensuring that the compression refrigeration system has an optimal refrigerant circulation volume under different working conditions; it can effectively adjust the optimal refrigerant circulation volume under different working conditions, requires less additional control software and hardware, and has relatively high reliability; because the optimal refrigerant circulation volume can be guaranteed under different working conditions, no retained refrigerant liquid will occupy the pipe space of the heat exchanger, so that the heat exchanger can give full play to its heat exchange capacity, thereby making the refrigeration system more energy-efficient during low-frequency operation, effectively solving the problem of refrigerant redundancy caused by the difference in refrigerant filling amounts required under different operating conditions of the fluorine pump compression refrigeration system, and solving the problem of refrigerant liquid retention and release. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1This is a system structure diagram of Embodiment 1 of a refrigeration system with a function of adjusting the redundant amount of refrigerant of the utility model (Liquid storage tank Embodiment 1);

[0056] Figure 2A This is a system structure diagram of Embodiment 1 of a refrigeration system with a function of adjusting the amount of redundant refrigerant according to the utility model (Liquid storage tank Embodiment 2);

[0057] Figure 2B yes Figure 2A An enlarged structural diagram of the left end limit rod in FIG.

[0058] Figure 3 This is a system structure diagram of Embodiment 1 of a refrigeration system with a function of adjusting the amount of redundant refrigerant according to the utility model (Liquid storage tank Embodiment 3);

[0059] Figure 4 This is a system structure diagram of a second embodiment of a refrigeration system with a refrigerant redundancy adjustment function of the utility model.

[0060] The reference numerals are:

[0061] 1. Compressor; 2. Liquid storage tank; 3. Condenser; 4. Throttle valve; 5. Evaporator; 6. Nozzle sleeve; 7. Positioning rod; 8. Rotating shaft; 9. Solenoid coil; 10. Fluorine pump; 11. Check valve A; 12. Control valve A; 13. Limit rod; 14. Ball; 15. Lifting rope; 16. Bearing assembly; 17. Limiting rope; 18. Control valve B; 19. Control valve C; 20. Internal fan; 21. Check valve B; 22. Oil separator; 23. Capillary tube; 24. External fan;

[0062] 101, first pipeline; 102, second pipeline; 103, third pipeline; 104, fourth pipeline; 105, fifth pipeline; 201, hose. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0066] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0068] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0069] like Figure 1-4 As shown, the utility model provides a refrigeration system with a refrigerant redundancy adjustment function, which includes:

[0070] The compressor 1, the liquid storage tank 2, the first pipeline 101 and the second pipeline 102 of the condenser 3, one end of the first pipeline 101 is connected to the condenser 3, and the other end is connected to the interior of the liquid storage tank 2, so that the refrigerant after heat exchange in the condenser 3 can be introduced into the liquid storage tank 2, and the liquid refrigerant in the liquid storage tank 2 can be discharged to the second pipeline 102. The discharge height of the liquid storage tank 2 changes with the frequency of the compressor 1. The higher the frequency of the compressor 1, the lower the discharge height of the liquid storage tank 2. Conversely, the lower the frequency of the compressor 1, the higher the discharge height of the liquid storage tank 2.

[0071] The utility model changes the discharge height of the liquid storage tank along with the frequency of the compressor. The higher the frequency of the compressor, the lower the discharge height of the liquid storage tank. On the contrary, the lower the frequency of the compressor, the higher the discharge height of the liquid storage tank. When the frequency of the compressor is high, more refrigerant liquid in the liquid storage tank can be discharged to participate in the circulation of the system, so as to ensure that there is enough refrigerant amount to participate in the refrigeration cycle of the system under high-frequency operation and ensure normal refrigeration or heating effect. When the frequency of the compressor is low, relatively less refrigerant liquid is discharged from the liquid storage tank, so that less refrigerant amount enters the system to participate in the circulation under low-frequency operation, and avoids the situation where too much refrigerant enters the system and causes the refrigerant to be retained in the heat exchanger, affecting the heat exchange effect.

[0072] The utility model designs a refrigerant outlet with adjustable height in the liquid storage tank, so that the refrigerant pipe mouth changes up and down accordingly under different operating frequencies in the compression refrigeration mode, thereby changing the amount of refrigerant liquid retained in the liquid storage tank, thereby ensuring that the compression refrigeration system has an optimal refrigerant circulation amount under different working conditions; it can effectively adjust the optimal refrigerant circulation amount under different working conditions, requires less additional control software and hardware, and has relatively high reliability; because the optimal refrigerant circulation amount can be guaranteed under different working conditions, no retained refrigerant liquid will occupy the pipeline space of the heat exchanger, so that the heat exchanger can give full play to its heat exchange capacity, thereby making the refrigeration system more energy-efficient during low-frequency operation, effectively solving the problem of refrigerant redundancy caused by the difference in refrigerant filling amounts required under different operating conditions of the fluorine pump compression refrigeration system, and solving the problem of retention and release of refrigerant liquid.

[0073] In some embodiments,

[0074] It also includes an evaporator 5 and a throttle valve 4. One end of the second pipeline 102 is connected to the interior of the liquid storage tank 2, and the other end is connected to the evaporator 5. The throttle valve 4 is arranged on the second pipeline 102 to guide the refrigerant in the liquid storage tank 2 to the throttle valve 4.

[0075] The position where the first pipeline 101 is connected to the liquid storage tank 2 is located at the top of the liquid storage tank 2 , and the other end of the first pipeline 101 is passed downward from the top of the liquid storage tank 2 into the liquid storage tank 2 .

[0076] This is a further preferred structural form of the refrigeration system with the function of adjusting the refrigerant redundancy of the utility model. The refrigerant liquid inside the liquid storage tank can be discharged through the second pipeline. The first pipeline of the utility model is preferably inserted downward from the top of the liquid storage tank into the liquid storage tank to provide refrigerant to the liquid storage tank.

[0077] like Figure 1 , in some embodiments,

[0078] It also includes a hose 201, which is located inside the liquid storage tank 2. The lower end of the hose 201 is connected to one end of the second pipeline 102. The upper end of the hose 201 is located below the liquid level of the liquid storage tank 2 or flush with the liquid level of the liquid storage tank 2. The upper end of the hose 201 can introduce liquid in the liquid storage tank 2 and guide it toward the second pipeline 102. The height of the upper end of the hose 201 changes with the frequency of the compressor 1. The higher the frequency of the compressor 1, the lower the height of the upper end of the hose 201. Conversely, the lower the frequency of the compressor 1, the higher the height of the upper end of the hose 201.

[0079] This is the preferred structural form of the first embodiment of the refrigeration system of the utility model with the function of adjusting the refrigerant redundancy. Through the setting of the hose structure, the upper end pipe mouth can introduce and export the liquid in the liquid storage tank, and the height of the upper end pipe mouth can change with the frequency of the compressor. When the compressor frequency is higher (or increased), the height of the upper end pipe mouth of the hose is lower (or reduced), which can form a more refrigerant liquid to be exported from the liquid storage tank at high frequency to participate in the circulation of the system, ensure the cooling / heating effect, and meet the needs. When the compressor frequency is lower (or reduced), the height of the upper end pipe mouth of the hose is higher (or increased), so that less refrigerant liquid is exported from the liquid storage tank at low frequency to participate in the system circulation, avoiding the situation where too much refrigerant participating in the circulation during low-frequency operation causes refrigerant to be retained in the heat exchanger, resulting in redundancy and affecting normal heat exchange, so that the compression refrigeration system has the best refrigerant circulation amount under different working conditions, and solves the problem of refrigerant redundancy caused by the difference in refrigerant filling amount required under different operating conditions of the fluorine pump compression refrigeration system.

[0080] In some embodiments,

[0081] It also includes a pipe mouth sleeve 6 and a rotating shaft 8. The upper end pipe mouth of the hose 201 is connected to the pipe mouth sleeve 6 and can move up and down together with the pipe mouth sleeve 6. The rotating shaft 8 and the pipe mouth sleeve 6 are threadedly matched. A first external thread is also provided on the outer circumferential surface of the pipe mouth sleeve 6. A second external thread is provided on the outer circumferential surface of the rotating shaft 8. The first external thread and the second external thread form a threaded match, so that the pipe mouth sleeve 6 can be driven to move up and down in the vertical direction by rotating the rotating shaft 8.

[0082] This is a further preferred structural form of system embodiment 1 of the utility model (liquid storage tank embodiment 1). Through the setting of the nozzle sleeve, the upper nozzle of the hose can be driven to move up and down as a whole, and through the rotating shaft, and the preferred mode of external thread matching between the rotating shaft and the nozzle sleeve, the purpose and effect of driving the nozzle sleeve to move up and down can be achieved by rotating the rotating shaft, thereby further realizing the up and down movement of the upper nozzle of the hose. At high frequency, more refrigerant liquid can be exported from the liquid storage tank to participate in the circulation of the system, ensuring the cooling / heating effect and meeting the needs. At low frequency, less refrigerant liquid can be exported from the liquid storage tank to participate in the circulation of the system, avoiding the situation where too much refrigerant participates in the circulation during low-frequency operation, causing refrigerant to be retained in the heat exchanger, so that the compression refrigeration system has the best refrigerant circulation amount under different working conditions.

[0083] In some embodiments,

[0084] It also includes a positioning rod 7, the pipe mouth sleeve 6 is sleeved on the outer periphery of the positioning rod 7, the rotating shaft 8 and the positioning rod 7 both extend in the vertical direction, the projection of the outer peripheral surface of the positioning rod 7 on the horizontal plane is a non-circular structure (preferably a polygon, including a triangle, a quadrilateral, etc., and further preferably a square (i.e. a rectangle or a square)), the inner periphery of the pipe mouth sleeve 6 matches the shape of the outer peripheral surface of the positioning rod 7, so that the pipe mouth sleeve 6 can only move along the axial direction of the positioning rod 7 but cannot rotate around the positioning rod 7.

[0085] The utility model can further limit the movement of the nozzle sleeve through the structural form of the positioning rod, especially through the horizontal plane projection of the outer peripheral surface of the positioning rod being non-circular, and the inner periphery of the nozzle sleeve matching the shape of the outer peripheral surface of the positioning rod, thereby effectively limiting the rotation of the nozzle sleeve, so that the nozzle sleeve can only move along the axial direction of the positioning rod, ensuring that the nozzle sleeve can only move in the up and down directions and avoid rotation, and achieving the effect of driving the nozzle sleeve to move in the up and down directions through the rotating shaft (avoiding the rotation of the nozzle sleeve but not being able to achieve up and down movement), and can drive the rotating shaft to rotate in different directions according to the frequency of the compressor, and then drive the nozzle sleeve to move upward or downward, so that the compression refrigeration system has an optimal refrigerant circulation amount at different frequencies.

[0086] The square positioning rod of the utility model is preferably vertically fixed inside the liquid storage tank and is parallel to the rotating axis and maintains a certain distance. The pipe mouth sleeve is arranged on the square positioning rod and can move up and down but cannot rotate. The external thread of the pipe mouth sleeve and the external thread of the rotating axis form a matching thread pair. The distance between the square positioning rod and the rotating axis can ensure the normal operation of the thread pair.

[0087] In some embodiments,

[0088] It also includes an electromagnetic coil 9, which is located outside the liquid storage tank 2. The rotating shaft 8 extends in the vertical direction. The upper end or the lower end of the rotating shaft 8 extends out of the liquid storage tank 2 and is arranged opposite to the electromagnetic coil 9 in the height direction, so that the rotating shaft 8 is driven to rotate by the magnetic field generated by the power supply of the electromagnetic coil 9; the other end of the rotating shaft 8 is located inside the liquid storage tank 2 and is provided with a bearing assembly 16. The outer periphery of the end of the rotating shaft 8 extending out of the liquid storage tank 2 is also provided with a sealing tube, and the sealing tube is located on the inner periphery of the electromagnetic coil 9.

[0089] This is a further preferred structural form of the first embodiment of the liquid storage tank of the utility model. The structure of the electromagnetic coil can provide power for the rotation drive of the rotating shaft. By energizing the electromagnetic coil, a magnetic field is generated to effectively drive the rotating shaft to rotate. The rotating shaft is preferably made of magnetic material. The sealing tube is set to ensure that the position where the rotating shaft passes through the liquid storage tank is effectively sealed to prevent leakage of liquid inside the liquid storage tank. The sealing tube is located on the inner periphery of the electromagnetic coil, which can not affect the magnetic field force of the electromagnetic coil on the rotating shaft, so that the electromagnetic coil can always drive the rotating shaft to rotate.

[0090] The electromagnetic coil of the utility model is energized to drive the rotating shaft to rotate, driving the pipe mouth sleeve to move up and down, and then driving the open pipe mouth of the hose to move up and down. Until the refrigerant liquid level in the liquid storage tank is higher than the open pipe mouth of the hose, the liquid refrigerant can flow from the hose into the one-way valve A. Therefore, by adjusting the height of the open pipe mouth of the hose, the capacity of the refrigerant retained in the liquid storage tank can be adjusted.

[0091] The bearing assembly of the utility model is preferably fixed at the bottom of the liquid storage tank, and the lower part of the rotating shaft is inserted and fixed in the bearing assembly and can rotate along the vertical axis. Preferably, the upper end of the rotating shaft protrudes from the top of the liquid storage tank and is wrapped by a sealing tube and sealed in the liquid storage tank; the electromagnetic coil is sleeved in the protruding sealing tube that wraps the upper end of the rotating shaft, and the electromagnetic coil is energized to generate magnetic force to drive the rotating shaft inside the liquid storage tank to rotate; the protruding sealing tube is the valve body.

[0092] Figure 1 Working principle:

[0093] Compression refrigeration mode: the solenoid valve A (control valve A12) is closed and the fluorine pump 10 is closed, the compressor 1 is turned on, and the height of the free nozzle of the hose is adjusted by the solenoid coil according to different operating frequencies, so that the refrigerant liquid retained in the liquid storage tank changes. The higher the operating frequency of the compressor, the lower the height of the free nozzle of the hose;

[0094] Fluorine pump refrigeration mode - solenoid valve A (control valve A12) is opened and fluorine pump 10 is opened, and compressor 1 is turned off. Because there is a reverse pressure difference at both ends of the one-way valve A and it cannot be conducted, there is no need to limit the height of the hose mouth.

[0095] like Figure 2A-2B , in some embodiments,

[0096] It also includes a pipe mouth sleeve 6 and a rotating shaft 8. The upper end pipe mouth of the hose 201 is connected to the pipe mouth sleeve 6 and can move up and down together with the pipe mouth sleeve 6. The pipe mouth sleeve 6 is sleeved on the outer periphery of the rotating shaft 8. The rotating shaft 8 and the pipe mouth sleeve 6 are threadedly matched. A first internal thread is also provided on the inner peripheral surface of the pipe mouth sleeve 6, and a third external thread is provided on the outer peripheral surface of the rotating shaft 8. The first internal thread and the third external thread form a threaded match, so as to drive the pipe mouth sleeve 6 to move axially along the rotating shaft 8 by rotating the rotating shaft 8.

[0097] This is the preferred structural form of the second liquid storage tank embodiment in the first refrigeration system embodiment of the utility model with the function of adjusting the redundant amount of refrigerant, that is, the pipe mouth sleeve and the rotating shaft are in a sleeve-connected relationship, the pipe mouth sleeve is sleeved on the outer periphery of the rotating shaft, and the pipe mouth sleeve has a first internal thread, and the rotating shaft has a third external thread, so as to form a matching internal and external thread structure, so as to effectively achieve the purpose and effect of driving the pipe mouth sleeve to move up and down by driving the rotating shaft to rotate, so as to realize that more refrigerant liquid can be exported from the liquid storage tank at high frequency to participate in the circulation of the system, to ensure the cooling / heating effect and meet the demand, and less refrigerant liquid can be exported from the liquid storage tank at low frequency to participate in the circulation of the system, to avoid the situation where the refrigerant is retained in the heat exchanger due to excessive amount of refrigerant participating in the circulation during low-frequency operation, so that the compression refrigeration system has the best refrigerant circulation amount under different working conditions.

[0098] In some embodiments,

[0099] It also includes a limit rod 13, one end of which is connected to the inner wall of the shell of the liquid storage tank 2, and the other end extends to connect with the outer peripheral wall of the pipe mouth sleeve 6. The other end of the limit rod 13 can limit the rotation of the pipe mouth sleeve 6, so that the pipe mouth sleeve 6 can only move axially along the rotating shaft 8.

[0100] The utility model further limits the movement of the nozzle sleeve through the structure of the limit rod, especially limits the rotation of the nozzle sleeve by connecting the other end of the limit rod with the outer peripheral wall of the nozzle sleeve, so that the nozzle sleeve can only move along the axial direction of the rotating shaft, ensuring that the nozzle sleeve can only move in the up and down directions and avoid rotation, thereby achieving the effect of driving the nozzle sleeve to move in the up and down directions through the rotating shaft (avoiding the rotation of the nozzle sleeve but not being able to achieve up and down movement), and can drive the rotating shaft to rotate in different directions according to the frequency of the compressor, thereby driving the nozzle sleeve to move upward or downward, so that the compression refrigeration system has an optimal refrigerant circulation amount at different frequencies.

[0101] Embodiment 2 of the liquid storage tank of the utility model Figure 2A-2BAs shown, the pipe mouth sleeve has an internal thread that matches the external thread of the rotating shaft to form a thread pair, and a limit rod is set on the outer side of the pipe mouth sleeve close to the inner wall of the liquid storage tank, and the lengths of the limit rods on both sides connected to the pipe mouth sleeve are not equal (that is, the vertical center line of the rotating shaft deviates from the central axis of the liquid storage tank); when the rotating shaft rotates, it drives the pipe mouth sleeve to rotate, because the limit rod will abut against the inner wall of the liquid storage tank, causing the pipe mouth sleeve to be unable to rotate, so that the pipe mouth sleeve can only move up and down.

[0102] In some embodiments,

[0103] There are at least two limit rods 13, and at least two limit rods 13 are spaced apart along the circumferential direction of the liquid storage tank 2, and at least two limit rods 13 are not equal (e.g. Figure 2A , is the length of the limiting rod 13 at the left end from one end connected to the inner wall of the shell to the other end connected to the nozzle sleeve 6, which is longer than the length of the limiting rod 13 at the right end from one end connected to the inner wall of the shell to the other end connected to the nozzle sleeve 6); the limiting rod 13 is abutted or clamped at the junction with the nozzle sleeve 6 to limit the rotation of the nozzle sleeve 6, the projection of the nozzle sleeve 6 in the horizontal plane is annular, the projection of the rotating shaft 8 in the horizontal plane is circular, the center of the nozzle sleeve 6 coincides with the center of the rotating shaft 8, and the center of the rotating shaft 8 is eccentric to the center of the projection of the liquid storage tank 2 in the horizontal plane;

[0104] A ball 14 is further provided at one end of the limiting rod 13 connected to the inner wall of the shell of the liquid storage tank 2 , so that the limiting rod 13 is in rolling contact with the inner wall of the shell through the ball 14 .

[0105] This is a further preferred structural form of the limit rod of the utility model, that is, at least two limit rods are preferably used, and at least two limit rods are spaced apart in the circumferential direction, and can act together on the outer circumferential wall of the pipe mouth sleeve to abut or clamp the pipe mouth sleeve to limit the rotation of the pipe mouth sleeve. Furthermore, the center of the rotating axis coincides with the center of the pipe mouth sleeve, but is eccentrically arranged with the center of the liquid storage tank, which can further limit the rotation of the pipe mouth sleeve. The utility model also forms a rolling connection between the limit rod and the inner wall of the liquid storage tank through a ball disposed at one end of the limit rod connected to the inner wall of the liquid storage tank, thereby effectively reducing the friction between the two and reducing power consumption.

[0106] The limit rod of the utility model is further preferably provided with a spherical groove on the end face close to the inner wall of the liquid storage tank, and a ball is placed in the spherical groove of the limit rod, and the end of the ball away from the limit rod abuts against the inner wall of the liquid storage tank. Therefore, when the limit rod moves up and down, the original linear sliding friction between the limit rod and the inner wall of the liquid storage tank is converted into rolling friction, the friction resistance is reduced, the up and down movement of the pipe mouth sleeve is more reliable, and the damage to the inner wall of the liquid storage tank is less.

[0107] In some embodiments,

[0108] It also includes an electromagnetic coil 9, which is located outside the liquid storage tank 2. The rotating shaft 8 extends in the vertical direction, and part of the structure of the rotating shaft 8 extends upward or downward from the liquid storage tank 2 and is arranged opposite to the electromagnetic coil 9 in the height direction, so that the rotating shaft 8 is driven to rotate by the magnetic field generated by the power supply of the electromagnetic coil 9. A sealing tube is also sleeved on the outer periphery of one end of the rotating shaft 8 extending out of the liquid storage tank 2, and the sealing tube is located on the inner periphery of the electromagnetic coil 9.

[0109] This is a further preferred structural form of the second embodiment of the liquid storage tank of the utility model. The structure of the electromagnetic coil can provide power for the rotation drive of the rotating shaft. By energizing the electromagnetic coil, a magnetic field is generated to effectively drive the rotating shaft to rotate. The rotating shaft is preferably made of magnetic material. The sealing tube is set to ensure that the position where the rotating shaft passes through the liquid storage tank is effectively sealed to prevent leakage of liquid inside the liquid storage tank. The sealing tube is located on the inner periphery of the electromagnetic coil, which can not affect the magnetic field force of the electromagnetic coil on the rotating shaft, so that the electromagnetic coil can always drive the rotating shaft to rotate.

[0110] like Figure 3 , in some embodiments,

[0111] It also includes a sling 15 (preferably a soft rope such as a rope) and a rotating shaft 8. The upper end of the hose 201 is connected to the lower end of the sling 15 and can move up and down together with the sling 15. The upper end of the sling 15 is connected to the rotating shaft 8, and the sling 15 can be wound around the outer periphery of the rotating shaft 8. The length of the sling 15 wound around the rotating shaft 8 increases or decreases as the rotating shaft 8 rotates, so as to drive the upper end of the hose 201 to move up and down by rotating the rotating shaft 8.

[0112] This is a further preferred structural form of the system embodiment 1 of the utility model (liquid storage tank embodiment 3). Through the setting of the sling, the upper end of the hose can be driven to move up and down as a whole, and through the rotating shaft, and the preferred mode of rotational winding cooperation between the rotating shaft and the sling, the rotating shaft can be rotated to achieve the purpose and effect of driving the length of the sling wound on the rotating shaft to increase or shorten, and the upper end of the hose can be further moved up and down. It can be achieved that at high frequency, more refrigerant liquid is exported from the liquid storage tank to participate in the circulation of the system, ensuring the cooling / heating effect and meeting the needs. At low frequency, less refrigerant liquid is exported from the liquid storage tank to participate in the system circulation, avoiding the situation where too much refrigerant participates in the circulation during low-frequency operation and causes refrigerant to be retained in the heat exchanger, so that the compression refrigeration system has the best refrigerant circulation amount under different working conditions.

[0113] The utility model preferably fixes a soft sling on the rotating shaft, such as a steel wire rope, and the free end of the sling hangs the free pipe mouth of the hose. When the rotating shaft rotates, the sling is wound around, thereby realizing the up and down movement of the pipe mouth of the hose.

[0114] In some embodiments,

[0115] It also includes an electromagnetic coil 9, which is located outside the liquid storage tank 2. The rotating shaft 8 extends in the horizontal direction, and one end of the rotating shaft 8 extends out of the liquid storage tank 2 and is arranged opposite to the electromagnetic coil 9, so that the rotating shaft 8 is driven to rotate by the magnetic field generated by the power supply of the electromagnetic coil 9. A bearing assembly 16 is provided at the other end of the rotating shaft 8. A sealing tube is also sleeved on the outer periphery of the end of the rotating shaft 8 extending out of the liquid storage tank 2, and the sealing tube is located on the inner periphery of the electromagnetic coil 9.

[0116] This is a further preferred structural form of the third embodiment of the liquid storage tank of the utility model. The structure of the electromagnetic coil can provide power for the rotation drive of the rotating shaft. By energizing the electromagnetic coil, a magnetic field is generated to effectively drive the rotating shaft to rotate. The rotating shaft is preferably made of magnetic material. The sealing tube is set to ensure that the position where the rotating shaft passes through the liquid storage tank is effectively sealed to prevent leakage of liquid inside the liquid storage tank. The sealing tube is located on the inner periphery of the electromagnetic coil, which can not affect the magnetic field force of the electromagnetic coil on the rotating shaft, so that the electromagnetic coil can always drive the rotating shaft to rotate.

[0117] The third embodiment of the liquid storage tank of the utility model is as follows Figure 3 As shown, the rotating shaft is preferably arranged horizontally and close to the top area of ​​the liquid storage tank, one end of which is limited and arranged on the side of the liquid storage tank by a bearing assembly, and the other end protrudes from the other side of the liquid storage tank and is wrapped by a sealing tube and sealed in the liquid storage tank; the electromagnetic coil is sleeved in the protruding sealing tube that wraps the rotating shaft, and the electromagnetic coil is energized to generate magnetic force to drive the rotating shaft inside the liquid storage tank to rotate; the protruding sealing tube is the valve body.

[0118] In some embodiments,

[0119] It also includes a limiting rope 17, the upper end of which is connected to the lower end of the sling 15, and the lower end of which is fixedly connected to the inner bottom of the liquid storage tank 2. The limiting rope 17 is a bendable structure, and the length of the limiting rope 17 is less than the length of the hose 201.

[0120] The free end of the sling of the utility model is preferably also hung with a limiting rope, and the other end of the limiting rope is fixed to the bottom of the liquid storage tank to prevent the sling from being too much wound around the rotating shaft and causing damage to the hose.

[0121] The utility model can also limit the length of the sling rolled up upwards by setting a limit rope, so as to prevent the sling from being too entangled by the rotating shaft and damaging the hose. This is because if there is no limit rope, the hose will be tightened and easily damaged. The length of the limit rope of the utility model is shorter than the length of the hose, so the limit rope is tightened first instead of the hose, so the hose can be prevented from being damaged.

[0122] The preferred length of the limiting rope of the utility model is limited. After being wound, tightened and straightened, the rotating shaft can no longer be wound around the limiting rope, and continued power supply cannot make the rotating shaft rotate, unless reverse power is applied to reverse the direction of the magnetic force so that the rotating shaft reverses and the tightened limiting rope is loosened.

[0123] like Figure 4 , in some embodiments,

[0124] It also includes a fourth pipeline 104 and a fifth pipeline 105,

[0125] One end of the fourth pipeline 104 is connected to the interior of the liquid storage tank 2 through the first liquid outlet on the liquid storage tank 2, and the other end is connected to the second pipeline 102. One end of the fifth pipeline 105 is connected to the interior of the liquid storage tank 2 through the second liquid outlet on the liquid storage tank 2, and the other end is connected to the second pipeline 102. The height of the first liquid outlet is higher than the height of the second liquid outlet. When the frequency of the compressor 1 is the first frequency, the fourth pipeline 104 is opened and the fifth pipeline 105 is closed. When the frequency of the compressor 1 is the second frequency, the fifth pipeline 105 is opened and the fourth pipeline 104 is closed. The first frequency is less than the second frequency, and the first frequency and the second frequency are both preset frequency values.

[0126] This is the preferred structural form of the second embodiment of the refrigeration system of the utility model with the function of adjusting the refrigerant redundancy. By setting at least two pipelines with different heights and different liquid outlets, one of the pipelines can be selectively connected and the other pipeline can be closed according to the frequency of the compressor. Compared with the continuous adjustment of the system embodiment one, the second embodiment is intermittent adjustment and control, which can realize the output of more refrigerant liquid from the liquid storage tank at high frequency to participate in the circulation of the system, ensure the cooling / heating effect and meet the needs, and output less refrigerant liquid from the liquid storage tank at low frequency to participate in the system circulation, so as to avoid the situation where too much refrigerant participating in the circulation during low-frequency operation causes refrigerant to be retained in the heat exchanger, resulting in redundancy and affecting normal heat exchange, so that the compression refrigeration system has the best refrigerant circulation amount under different working conditions, and solves the problem of refrigerant redundancy caused by the difference in refrigerant filling amount required under different operating conditions of the fluorine pump compression refrigeration system.

[0127] Embodiment 24 of the refrigeration system of the present utility model is as follows Figure 4 As shown, a plurality of liquid outlets at different heights are arranged on the side of the liquid storage tank, the top liquid outlet is connected to a one-way valve A, and the remaining liquid outlets are respectively connected to solenoid valves and then connected between the outlet of the one-way valve A and the outlet of the fluorine pump.

[0128] Figure 4 Working principle:

[0129] Compression refrigeration mode - solenoid valve A (control valve A12) is closed and fluorine pump 10 is closed, compressor 1 is turned on, and solenoid valve B (control valve B18) or solenoid valve C (control valve C19) at different heights are opened and closed according to different operating frequencies, so that the refrigerant liquid retained in the liquid storage tank changes. The higher the operating frequency of the compressor, the lower solenoid valve is opened, and the lower solenoid valve is closed when the operating frequency of the compressor is low; for example, solenoid valve B is opened at 100% load, solenoid valve B is closed and solenoid valve C is opened at 75% load, and solenoid valve B and solenoid valve C are closed at 50% load to allow the refrigerant to flow out from the upper outlet through the one-way valve A.

[0130] Fluorine pump refrigeration mode - solenoid valve A is open and the fluorine pump is turned on, and the compressor is turned off because there is a reverse pressure difference at both ends of the one-way valve A and it cannot be connected. At the same time, solenoid valve B and solenoid valve C are closed to prevent the refrigerant at the outlet of the fluorine pump from flowing back to the liquid storage tank; during the startup phase of the fluorine pump, solenoid valve B or solenoid valve C can be opened to allow part of the refrigerant at the outlet of the fluorine pump to flow back into the liquid storage tank, so that the pressure in the liquid storage tank does not drop too quickly, and to prevent the refrigerant from gasifying due to the rapid pressure drop in the liquid storage tank, which may cause cavitation damage to the fluorine pump.

[0131] In some embodiments,

[0132] One end of the second pipeline 102 is connected to the interior of the liquid storage tank 2 through a third liquid outlet on the liquid storage tank 2. The height of the third liquid outlet is higher than that of the first liquid outlet.

[0133] The one-way valve A11 is also included. The one-way valve A11 is disposed on the second pipeline 102 and can only allow the fluid to flow out of the liquid storage tank 2 to the second pipeline 102.

[0134] The other end of the fourth pipeline 104 is connected to a position on the second pipeline 102 between the one-way valve A11 and the throttle valve 4, and the other end of the fifth pipeline 105 is connected to a position on the second pipeline 102 between the one-way valve A11 and the throttle valve 4 (because the position where the fourth pipeline is connected to the liquid storage tank is higher than the position where the fifth pipeline is connected to the liquid storage tank, the height relationship between the connection position of the fourth pipeline and the second pipeline and the connection position of the fifth pipeline and the second pipeline is not limited here, as long as it can be ensured that the fourth pipeline can suck a higher liquid level fluid when the compressor frequency is low, and the fifth pipeline can suck a lower liquid level fluid when the compressor frequency is high).

[0135] The fourth pipeline 104 is provided with a control valve C19 , and the fifth pipeline 105 is provided with a control valve B18 .

[0136] This is a further preferred structural form of embodiment 2 of the refrigeration system with a refrigerant redundancy adjustment function of the utility model. Through the setting of control valve B and control valve C, the fourth or fifth pipeline can be controlled to be opened or closed according to the size of the compressor frequency. When the frequency of the compressor 1 is the first frequency, control valve C is opened and control valve B is closed, the fourth pipeline 104 is opened and the fifth pipeline 105 is closed. When the frequency of the compressor 1 is the second frequency, control valve B is opened and control valve C is closed, the fifth pipeline 105 is opened and the fourth pipeline 104 is closed. At high frequencies, more refrigerant liquid is exported from the liquid storage tank to participate in the circulation of the system, thereby ensuring the cooling / heating effect and meeting the demand. At low frequencies, less refrigerant liquid is exported from the liquid storage tank to participate in the circulation of the system, thereby avoiding the situation where too much refrigerant participates in the circulation during low-frequency operation, causing refrigerant to be retained in the heat exchanger.

[0137] In some embodiments,

[0138] The refrigeration system is a fluorine pump compression refrigeration system, which also includes a fluorine pump 10, a one-way valve A11 and a third pipeline 103. The one-way valve A11 is arranged on the second pipeline 102 and can only allow fluid to flow out of the liquid storage tank 2 to the second pipeline 102. One end of the third pipeline 103 is connected to the inner bottom of the liquid storage tank 2, and the other end is connected to the position on the second pipeline 102 located between the one-way valve A11 and the throttle valve 4. The fluorine pump 10 is arranged on the third pipeline 103, and a control valve A12 is also arranged on the third pipeline 103.

[0139] This is the preferred structural form of the refrigeration system of the utility model, that is, a fluorine pump compression refrigeration system including a fluorine pump. The fluorine pump of the utility model is connected to the inner bottom of the liquid storage tank through a third pipeline, thereby ensuring that when operating in the fluorine pump mode, a larger or maximum amount of refrigerant enters the system (compared with the compression refrigeration mode) or that the maximum amount of refrigerant participating in the system operation in the compression refrigeration mode is equal to the refrigerant amount in the fluorine pump mode.

[0140] like Figure 1 As shown, the fluorine pump compression refrigeration system is composed of a compressor 1, a condenser 3, a liquid storage tank 2, a fluorine pump 10, a throttle valve 4, and an evaporator 5 connected in sequence; a one-way valve A11 is connected in parallel to bypass the fluorine pump 10, and the flow direction of the one-way valve A11 is only allowed to be directed from the inlet of the fluorine pump 10 to the outlet of the fluorine pump 10, and the inlet of the one-way valve A11 is connected to the bottom area of ​​the liquid storage tank 2 and / or connected between the outlet of the liquid storage tank 2 and the inlet of the fluorine pump 10; a one-way valve B21 is connected in parallel to bypass the compressor, and the inlet and outlet of the one-way valve B21 are respectively connected to the suction port and the exhaust port of the compressor 1, and the flow direction of the one-way valve B21 is only allowed to be directed from the inlet of the compressor to the outlet of the compressor.

[0141] The utility model designs a refrigerant outlet with adjustable height in the liquid storage tank, so that the refrigerant pipe mouth can rise and fall accordingly under different operating frequencies in the compression refrigeration mode, thereby changing the amount of refrigerant liquid retained in the liquid storage tank, thereby ensuring that the compression refrigeration system has an optimal refrigerant circulation amount under different working conditions.

[0142] The utility model preferably adopts an electromagnetic coil to drive the internal rotating shaft, and a matching thread pair is provided between the pipe mouth sleeve and the rotating shaft. The rotating shaft drives the matching thread pair to move, and the refrigerant pipe mouth connected to the pipe mouth sleeve moves up and down accordingly; another embodiment is that the rotating shaft rotates and wraps around the sling, and the other end of the sling is fixedly suspended on the refrigerant pipe mouth; another embodiment is that multiple solenoid valves are used to control the on and off of different refrigerant pipe mouths, and the structure is simpler and more reliable.

[0143] The fluorine pump compression refrigeration system of the utility model also includes an oil separator and a capillary tube for oil return. The oil separator is connected between the exhaust port of the compressor and the inlet of the condenser, the air inlet of the oil separator is connected to the exhaust port of the compressor, the air outlet of the oil separator is connected to the inlet of the condenser, and the capillary tube is connected between the oil outlet of the oil separator and the air intake port of the compressor.

[0144] The fluorine pump compression refrigeration system of the utility model preferably includes a control valve A12 (solenoid valve A), and the solenoid valve A is arranged between the outlet of the liquid storage tank 2 and the inlet of the fluorine pump 10.

[0145] The liquid storage tank 2 is used to adjust the redundancy difference between different refrigerant circulation amounts under various operating conditions, that is, the refrigerant liquid level in the liquid storage tank 2 will change, resulting in a change in the amount of refrigerant retained therein.

[0146] The liquid storage tank 2 includes an inlet, a third liquid outlet and a fourth liquid outlet, and also includes an electromagnetic coil, a rotating shaft 8 and a pipe mouth sleeve 6 that forms a threaded pair with the rotating shaft 8, a square positioning rod 7, and a bearing assembly 16. The external port of the third liquid outlet of the liquid storage tank is connected to the inlet of the one-way valve A11, and the internal port of the third liquid outlet is connected to the hose 201. The other end of the hose 201 is fixed on the pipe mouth sleeve 6 and moves up and down with the pipe mouth sleeve and allows the refrigerant to enter the hose 201 from this port; the fourth liquid outlet is connected to the inlet of the electromagnetic valve A (control valve A12).

[0147] The utility model also provides a control method for a refrigeration system with a refrigerant redundancy adjustment function as described above, which comprises:

[0148] A detection step, detecting the operating frequency of the compressor;

[0149] A determination step of determining whether the current frequency detection value of the compressor is increased or decreased relative to the previous frequency detection value thereof;

[0150] The control step is as follows: when the current frequency detection value increases relative to the previous frequency detection value, the height of the discharge port of the liquid storage tank 2 is controlled to be lowered; when the current frequency detection value decreases relative to the previous frequency detection value, the height of the discharge port of the liquid storage tank 2 is controlled to be increased.

[0151] The utility model designs a refrigerant outlet with adjustable height in the liquid storage tank, so that the refrigerant pipe mouth changes up and down accordingly under different operating frequencies in the compression refrigeration mode, thereby changing the amount of refrigerant liquid retained in the liquid storage tank, thereby ensuring that the compression refrigeration system has an optimal refrigerant circulation amount under different working conditions; it can effectively adjust the optimal refrigerant circulation amount under different working conditions, requires less additional control software and hardware, and has relatively high reliability; because the optimal refrigerant circulation amount can be guaranteed under different working conditions, no retained refrigerant liquid will occupy the pipeline space of the heat exchanger, so that the heat exchanger can give full play to its heat exchange capacity, thereby making the refrigeration system more energy-efficient during low-frequency operation, effectively solving the problem of refrigerant redundancy caused by the difference in refrigerant filling amounts required under different operating conditions of the fluorine pump compression refrigeration system, and solving the problem of retention and release of refrigerant liquid.

[0152] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model. The above is only a preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the utility model, and these improvements and variations should also be regarded as the protection scope of the utility model.

Claims

1. A refrigeration system with a function of adjusting the amount of redundant refrigerant, characterized in that: include: A compressor (1), a liquid storage tank (2), a condenser (3), a first pipeline (101) and a second pipeline (102), wherein one end of the first pipeline (101) is connected to the condenser (3) and the other end is connected to the interior of the liquid storage tank (2) so that the refrigerant after heat exchange in the condenser (3) can be introduced into the liquid storage tank (2), and the liquid refrigerant in the liquid storage tank (2) can be discharged to the second pipeline (102). The discharge height of the liquid storage tank (2) changes with the frequency of the compressor (1). The higher the frequency of the compressor (1), the lower the discharge height of the liquid storage tank (2). Conversely, the lower the frequency of the compressor (1), the higher the discharge height of the liquid storage tank (2).

2. The refrigeration system with a refrigerant redundancy adjustment function according to claim 1, characterized in that: It also includes an evaporator (5) and a throttle valve (4); one end of the second pipeline (102) is connected to the interior of the liquid storage tank (2), and the other end is connected to the evaporator (5); the throttle valve (4) is arranged on the second pipeline (102) so as to guide the refrigerant in the liquid storage tank (2) to the throttle valve (4); The position where the first pipeline (101) is connected to the liquid storage tank (2) is located at the top of the liquid storage tank (2), and the other end of the first pipeline (101) is passed downward from the top of the liquid storage tank (2) into the liquid storage tank (2).

3. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 2, characterized in that: The invention also comprises a hose (201), wherein the hose (201) is located inside the liquid storage tank (2), the lower end of the hose (201) is connected to one end of the second pipeline (102), the upper end of the hose (201) is located below the liquid level of the liquid storage tank (2) or flush with the liquid level of the liquid storage tank (2), the upper end of the hose (201) can introduce liquid in the liquid storage tank (2) and guide it toward the second pipeline (102), and the height of the upper end of the hose (201) changes with the frequency of the compressor (1); the higher the frequency of the compressor (1), the lower the height of the upper end of the hose (201); conversely, the lower the frequency of the compressor (1), the higher the height of the upper end of the hose (201).

4. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 3, characterized in that: The hose (201) further comprises a nozzle sleeve (6) and a rotating shaft (8); the nozzle at the upper end of the hose (201) is connected to the nozzle sleeve (6) and can move up and down integrally with the nozzle sleeve (6); the rotating shaft (8) and the nozzle sleeve (6) are threadedly matched; a first external thread is also provided on the outer peripheral surface of the nozzle sleeve (6); a second external thread is provided on the outer peripheral surface of the rotating shaft (8); the first external thread and the second external thread form a threaded match, so that the nozzle sleeve (6) can be driven to move up and down in the vertical direction by rotating the rotating shaft (8).

5. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 4, characterized in that: It also includes a positioning rod (7), the pipe mouth sleeve (6) is sleeved on the outer periphery of the positioning rod (7), the rotating shaft (8) and the positioning rod (7) both extend in the vertical direction, the projection of the outer peripheral surface of the positioning rod (7) on the horizontal plane is a non-circular structure, and the inner periphery of the pipe mouth sleeve (6) matches the shape of the outer peripheral surface of the positioning rod (7), so that the pipe mouth sleeve (6) can only move along the axial direction of the positioning rod (7) but cannot rotate around the positioning rod (7).

6. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 4, characterized in that: The invention also comprises an electromagnetic coil (9), wherein the electromagnetic coil (9) is located outside the liquid storage tank (2); the rotating shaft (8) extends in a vertical direction; the upper end or the lower end of the rotating shaft (8) protrudes out of the liquid storage tank (2) and is arranged opposite to the electromagnetic coil (9) in a height direction, so as to drive the rotating shaft (8) to rotate by a magnetic field generated by energizing the electromagnetic coil (9); the other end of the rotating shaft (8) is located inside the liquid storage tank (2) and is provided with a bearing assembly (16); a sealing tube is also sleeved on the outer periphery of one end of the rotating shaft (8) protruding out of the liquid storage tank (2); the sealing tube is located on the inner periphery of the electromagnetic coil (9).

7. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 3, characterized in that: The hose (201) further comprises a nozzle sleeve (6) and a rotating shaft (8); the nozzle of the upper end of the hose (201) is connected to the nozzle sleeve (6) and can move up and down integrally with the nozzle sleeve (6); the nozzle sleeve (6) is sleeved on the outer periphery of the rotating shaft (8); the rotating shaft (8) and the nozzle sleeve (6) are threadedly matched; a first internal thread is further provided on the inner peripheral surface of the nozzle sleeve (6); a third external thread is provided on the outer peripheral surface of the rotating shaft (8); the first internal thread and the third external thread form a threaded match, so that the nozzle sleeve (6) is driven to move axially along the rotating shaft (8) by rotating the rotating shaft (8).

8. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 7, characterized in that: It also includes a limiting rod (13), one end of which is connected to the inner wall of the shell of the liquid storage tank (2), and the other end of which extends to connect to the outer peripheral wall of the nozzle sleeve (6). The other end of the limiting rod (13) can limit the rotation of the nozzle sleeve (6), so that the nozzle sleeve (6) can only move axially along the rotating shaft (8).

9. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 8, characterized in that: There are at least two limit rods (13), at least two limit rods (13) are arranged at intervals along the circumferential direction of the liquid storage tank (2), and the lengths of at least two limit rods (13) are unequal; the limit rods (13) are in contact or snap-fit ​​with the nozzle sleeve (6) at the junction to limit the rotation of the nozzle sleeve (6); the projection of the nozzle sleeve (6) in the horizontal plane is an annular shape; the projection of the rotation axis (8) in the horizontal plane is a circle; the center of the nozzle sleeve (6) coincides with the center of the rotation axis (8); the center of the rotation axis (8) is eccentric to the center of the projection of the liquid storage tank (2) in the horizontal plane; A ball (14) is also provided at one end of the limiting rod (13) that is connected to the inner wall of the shell of the liquid storage tank (2), so that the limiting rod (13) is in rolling contact with the inner wall of the shell through the ball (14).

10. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 7, characterized in that: The invention also comprises an electromagnetic coil (9), wherein the electromagnetic coil (9) is located outside the liquid storage tank (2), the rotating shaft (8) extends in the vertical direction, and a part of the structure of the rotating shaft (8) extends upward or downward from the liquid storage tank (2) and is arranged opposite to the electromagnetic coil (9) in the height direction, so that the rotating shaft (8) is driven to rotate by the magnetic field generated by the electromagnetic coil (9) being energized, and a sealing tube is also sleeved on the outer periphery of one end of the rotating shaft (8) extending from the liquid storage tank (2), and the sealing tube is located on the inner periphery of the electromagnetic coil (9).

11. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 3, characterized in that: It also comprises a sling (15) and a rotating shaft (8); the upper end of the hose (201) is connected to the lower end of the sling (15) and can move up and down together with the sling (15); the upper end of the sling (15) is connected to the rotating shaft (8), and the sling (15) can be wound around the outer periphery of the rotating shaft (8); the length of the sling (15) wound around the rotating shaft (8) increases or decreases as the rotating shaft (8) rotates, so that the upper end of the hose (201) is driven to move up and down by rotating the rotating shaft (8).

12. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 11, characterized in that: The invention also comprises an electromagnetic coil (9), wherein the electromagnetic coil (9) is located outside the liquid storage tank (2), the rotating shaft (8) extends in a horizontal direction, and one end of the rotating shaft (8) extends out of the liquid storage tank (2) and is arranged opposite to the electromagnetic coil (9), so that the rotating shaft (8) is driven to rotate by a magnetic field generated by energizing the electromagnetic coil (9), and a bearing assembly (16) is arranged at the other end of the rotating shaft (8), and a sealing tube is also sleeved on the outer periphery of the end of the rotating shaft (8) extending out of the liquid storage tank (2), and the sealing tube is located on the inner periphery of the electromagnetic coil (9).

13. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 11, characterized in that: It also comprises a limiting rope (17), the upper end of which is connected to the lower end of the sling (15), the lower end of which is fixedly connected to the inner bottom of the liquid storage tank (2), the limiting rope (17) being a bendable structure, and the length of which is less than the length of the hose (201).

14. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 2, characterized in that: It also includes a fourth pipeline (104) and a fifth pipeline (105), One end of the fourth pipeline (104) is connected to the interior of the liquid storage tank (2) through the first liquid outlet on the liquid storage tank (2), and the other end is connected to the second pipeline (102); one end of the fifth pipeline (105) is connected to the interior of the liquid storage tank (2) through the second liquid outlet on the liquid storage tank (2), and the other end is connected to the second pipeline (102); the height of the first liquid outlet is higher than the height of the second liquid outlet; when the frequency of the compressor (1) is a first frequency, the fourth pipeline (104) is opened and the fifth pipeline (105) is closed; when the frequency of the compressor (1) is a second frequency, the fifth pipeline (105) is opened and the fourth pipeline (104) is closed; the first frequency is less than the second frequency, and the first frequency and the second frequency are both preset frequency values.

15. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 14, characterized in that: One end of the second pipeline (102) is connected to the interior of the liquid storage tank (2) through a third liquid outlet on the liquid storage tank (2), and the height of the third liquid outlet is higher than that of the first liquid outlet. The one-way valve A (11) is arranged on the second pipeline (102) and can only allow the fluid to flow out of the liquid storage tank (2) into the second pipeline (102). The other end of the fourth pipeline (104) is connected to a position on the second pipeline (102) between the one-way valve A (11) and the throttle valve (4), and the other end of the fifth pipeline (105) is connected to a position on the second pipeline (102) between the one-way valve A (11) and the throttle valve (4). The fourth pipeline (104) is provided with a control valve C (19), and the fifth pipeline (105) is provided with a control valve B (18).

16. The refrigeration system with a function of adjusting the amount of redundant refrigerant according to claim 2, characterized in that: The refrigeration system is a fluorine pump compression refrigeration system, and further comprises a fluorine pump (10), a one-way valve A (11) and a third pipeline (103); the one-way valve A (11) is arranged on the second pipeline (102) and can only allow fluid to flow out of the liquid storage tank (2) to the second pipeline (102); one end of the third pipeline (103) is connected to the inner bottom of the liquid storage tank (2), and the other end is connected to a position on the second pipeline (102) between the one-way valve A (11) and the throttle valve (4); the fluorine pump (10) is arranged on the third pipeline (103), and a control valve A (12) is also arranged on the third pipeline (103).

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