Anti-freezing device and compressor

Abstract

The application provides a freezing prevention device and a compressor, which comprise an evaporator, the evaporator having a plurality of heat exchange pipes for circulating refrigerant; the plurality of heat exchange pipes are arranged at intervals; a blocking component is connected with the evaporator, the blocking component has a containing cavity and an inlet and an outlet communicated with the containing cavity, the inlet is arranged corresponding to the water outlet of each heat exchange pipe, so that the fluid in the plurality of heat exchange pipes flows out from the outlet after passing through the containing cavity; the containing cavity comprises a circulation cavity for the fluid in the heat exchange pipe to flow through and a storage cavity communicated with the circulation cavity, the storage cavity is located below the circulation cavity; a measuring device is arranged in the circulation cavity, and the measuring device is used for measuring the volume of the fluid in the storage cavity. The freezing prevention device and the compressor solve the technical problem that the icing of the pipeline in the compressor is not easy to be found in the related art.

Description

Technical Field

[0001] This invention relates to the field of antifreeze technology, specifically to an antifreeze device and a compressor. Background Technology

[0002] Currently, there are many methods for ice making in the industry, such as dynamic ice making with subcooled water, cutting, falling film, and vacuum methods. Among them, subcooled water ice making is gradually being used in the field of ice slurry production due to its high heat transfer efficiency and strong feasibility.

[0003] The subcooled water ice-making method involves cooling water above zero degrees Celsius to below zero degrees Celsius within an evaporator. At this point, the water is not yet frozen and is in an unstable state; it is only temporarily kept in a liquid state due to the energy barrier required for freezing. After leaving the evaporator, the subcooled water enters a storage tank where it undergoes excitation methods such as ultrasonic vibration to partially freeze. The remaining subcooled water returns to the evaporator inlet.

[0004] Due to the properties of subcooled water, it easily freezes inside the evaporator. Once frozen, this can easily lead to frozen tubes and plates, allowing water to enter the refrigerant system, damaging the compressor and causing incalculable losses. In shell-and-tube heat exchangers, because freezing is somewhat random, freezing may only occur in one or a few tubes. In this case, the overall system operating conditions may only change slightly. By the time the change becomes observable, the tubes have already frozen and cracked.

[0005] Therefore, existing technologies need further development. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide an antifreeze device and compressor to solve the technical problem that it is not easy to detect ice formation in the pipes inside the compressor in related technologies.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: It provides an antifreeze device and a compressor, comprising: an evaporator having multiple heat exchange tubes for circulating refrigerant; the multiple heat exchange tubes being arranged at intervals; a blocking component connected to the evaporator, the blocking component having a receiving cavity and an inlet and an outlet communicating with the receiving cavity, the inlet being correspondingly arranged with the outlets of the multiple heat exchange tubes, so that the fluid in the multiple heat exchange tubes flows out from the outlet after passing through the receiving cavity; the receiving cavity includes a flow chamber through which the fluid in the heat exchange tubes flows and a liquid storage cavity communicating with the flow chamber, the liquid storage cavity being located below the flow chamber; and a measuring device disposed within the flow chamber, the measuring device being used to measure the volume of the fluid in the liquid storage cavity.

[0008] Furthermore, there are multiple inlets, each connected to a corresponding outlet of a heat exchange tube; there are also multiple outlets, each corresponding to a corresponding inlet.

[0009] Furthermore, the blocking component includes a first connecting plate and a second connecting plate disposed opposite to each other, with the inlet disposed on the first connecting plate and the outlet disposed on the second connecting plate.

[0010] Furthermore, the bottom shell is connected to both the first connecting plate and the second connecting plate, and the bottom shell has a receiving tank for containing fluid, which is in communication with the liquid storage cavity.

[0011] Furthermore, the bottom of the receiving tank has a spherical structure.

[0012] Furthermore, the antifreeze device also includes: a drainage chamber connected to the second connecting plate, the drainage chamber including a drainage cavity communicating with the inlet and a drain port communicating with the drainage cavity, the side wall of the drainage cavity being used to block the fluid flowing out from the outlet so that the fluid passes through the side wall of the drainage cavity and flows out from the drain port; and a water storage tank located below the drain port to contain the fluid flowing out from the drain port.

[0013] Furthermore, the measuring device includes a liquid level sensor to measure the fluid level in the storage cavity and obtain the volume of the fluid in the storage cavity.

[0014] Furthermore, the antifreeze device also includes a drain pipe that is connected to the liquid storage chamber so as to discharge the fluid in the liquid storage chamber through the drain pipe.

[0015] Furthermore, the heat exchange tube is a circular tube with a circular through hole at the inlet; the inner diameter of the heat exchange tube is smaller than the diameter of the inlet.

[0016] A compressor including the antifreeze device as described above.

[0017] Beneficial effects:

[0018] 1. The antifreeze device of the present invention uses the rise in liquid level in the flow chamber to trigger the start of the measuring device, so that the antifreeze device can specifically control and prevent the heat exchange tube from freezing and cracking.

[0019] 2. The antifreeze device and compressor of the present invention form a blockage between the flow chamber and the blocking component to prevent the ice layer from returning to the evaporator heat exchange tube, thus avoiding tube freezing.

[0020] 3. The antifreeze device and compressor of the present invention effectively avoid damage to the compressor caused by the freezing pipe. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the antifreeze device used in an embodiment of the present invention under normal operating conditions.

[0022] Figure 2 This is a schematic diagram of the blocking component of the antifreeze device used in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the drainage chamber of the antifreeze device used in an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of the freezing pipe of the antifreeze device used in an embodiment of the present invention in its usage state;

[0025] Figure 5 This is a front view of the first connecting plate of the antifreeze device used in the first embodiment of the present invention;

[0026] Figure 6 This is a front view of the second connecting plate of the antifreeze device used in the first embodiment of the present invention;

[0027] Figure 7 This is a front view of the first connecting plate of the antifreeze device used in the second embodiment of the present invention;

[0028] Figure 8 This is a front view of the first connecting plate of the antifreeze device used in the third embodiment of the present invention;

[0029] Figure 9 This is a front view of the first connecting plate of the antifreeze device used in the fourth embodiment of the present invention.

[0030] The above figures include the following reference numerals:

[0031] 1. Evaporator; 11. Heat exchange tube; 2. Blocking component; 21. Receiving cavity; 22. Inlet; 23. Outlet; 24. Liquid storage cavity; 25. First connecting plate; 26. Second connecting plate; 27. Bottom shell; 271. Receiving tank; 28. Flow cavity; 3. Measuring device; 4. Drainage chamber; 41. Drainage cavity; 411. Drain outlet; 42. Water storage tank; 5. Drain pipe. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0033] According to an embodiment of the present invention, an antifreeze device is provided; please refer to [link / reference]. Figures 1 to 9The device includes: an evaporator 1 having multiple heat exchange tubes 11 for circulating refrigerant; the multiple heat exchange tubes 11 are arranged at intervals; a blocking component 2 connected to the evaporator 1, the blocking component 2 having a receiving cavity 21 and an inlet 22 and an outlet 23 communicating with the receiving cavity 21, the inlet 22 being correspondingly arranged with the outlets of the multiple heat exchange tubes 11 so that the fluid in the multiple heat exchange tubes 11 flows out from the outlet 23 after passing through the receiving cavity 21; the receiving cavity 21 includes a flow chamber 28 through which the fluid in the heat exchange tubes 11 flows and a liquid storage cavity 24 communicating with the flow chamber 28, the liquid storage cavity 24 being located below the flow chamber 28; and a measuring device 3 disposed in the flow chamber 28, the measuring device 3 being used to measure the volume of the fluid in the liquid storage cavity 24.

[0034] In this embodiment, the antifreeze device connects the heat exchange tubes 11 on the evaporator 1 to the blocking component 2. The blocking component 2 has a receiving cavity 21, an inlet 22, and an outlet 23, with the number of inlets 22 corresponding to the number of heat exchange tubes 11. Under normal circumstances, the fluid in the heat exchange tubes 11 flows out through the flow chamber 28 of the receiving cavity 21 and exits from the corresponding outlet 23. When subcooled water is converted into ice, it needs to overcome a local energy barrier to generate ice nuclei. As the ice nuclei grow, if they adhere to the wall of the heat exchange tubes 11, they gradually block and eventually burst the heat exchange tubes 11. The fluid flowing into the heat exchange tubes 11 will then travel along the flow chamber 28 to the liquid storage chamber 24. By measuring the fluid volume in the liquid storage chamber 24 using the measuring device 3, it is possible to promptly determine whether the heat exchange tubes 11 are frozen. This antifreeze device solves the technical problem in related technologies where icing in the evaporator pipes is not easily detected.

[0035] See Figure 2 In the antifreeze device of this embodiment, there are multiple inlets 22, each connected to a corresponding outlet of a multiple heat exchange tube 11; there are also multiple outlets 23, each corresponding to a corresponding inlet 22. The multiple inlets 22 and outlets 23, connected to corresponding outlets of the multiple heat exchange tubes 11, provide a flow channel for the multiple heat exchange tubes 11.

[0036] See Figure 2 In the antifreeze device of this embodiment, the blocking component 2 includes a first connecting plate 25 and a second connecting plate 26 disposed opposite to each other. An inlet 22 is disposed on the first connecting plate 25, and an outlet 23 is disposed on the second connecting plate 26. Multiple inlets 22 and multiple outlets 23 are respectively disposed on the first connecting plate 25 and the second connecting plate 26, forming a row of evenly distributed circular holes to enhance the stability of the blocking component 2.

[0037] See Figure 2In the antifreeze device of this embodiment, the blocking component 2 includes a bottom shell 27, which is connected to both the first connecting plate 25 and the second connecting plate 26. The bottom shell 27 has a receiving groove 271 for containing fluid, which communicates with the liquid storage chamber 24. One end of the bottom shell 27 is connected to the first connecting plate 25, and the other end of the bottom shell 27 is connected to both the first connecting plate 25 and the second connecting plate 26. The receiving groove 271 of the bottom shell 27 communicates with the liquid storage chamber 24 and is used to contain fluid.

[0038] See Figure 1 and Figure 2 In the antifreeze device of this embodiment, the bottom of the receiving tank 271 is a spherical structure, which facilitates the storage and discharge of fluid in the liquid storage cavity 24 and prevents ice nuclei in the supercooled water from accumulating or clogging the receiving tank 271.

[0039] See Figure 1 and Figure 3 In this embodiment of the antifreeze device, the antifreeze device further includes: a drainage chamber 4, which is connected to the second connecting plate 26. The drainage chamber 4 includes a drainage cavity 41 communicating with the inlet 22 and a drain port 411 communicating with the drainage cavity 41. The side wall of the drainage cavity 41 is used to block the fluid flowing out from the outlet 23 so that the fluid passes through the side wall of the drainage cavity 41 and flows out from the drain port 411; and a water storage tank 42, which is located below the drain port 411 to contain the fluid flowing out from the drain port 411.

[0040] The antifreeze device in this embodiment also includes a flow-guiding chamber 4, which has a flow-guiding cavity 41. The flow-guiding cavity 41 extends outward from the inlet 22 along the flow direction of the fluid to the outlet 411. A water storage tank 42 is provided below the outlet 411. The side wall of the flow-guiding cavity 41 has a downward arc-shaped structure towards the outlet 411, which is beneficial for guiding the fluid in the heat exchange tube 11 into the water storage tank.

[0041] See Figure 1 and Figure 2 In the antifreeze device of this embodiment, the measuring device 3 includes a liquid level sensor to measure the fluid level in the liquid storage chamber 24 and obtain the volume of the fluid in the liquid storage chamber 24. When the fluid in the liquid storage chamber 24 reaches a specified level, the liquid level sensor is triggered and the next action is taken.

[0042] Specifically, the liquid level sensor is a float valve, and the antifreeze device also includes a control module. When a heat exchange tube 11 of the evaporator 1 freezes, the flow rate of that tube gradually decreases due to ice blockage. Therefore, the jet in the receiving cavity 21 will gradually deviate from the outlet 23. At this time, a large amount of splashing will occur instantaneously, causing the liquid level in the receiving tank 271 to rise rapidly, touching the float valve, activating the response system, and the control module will automatically stop the machine and switch the mode to heating and de-icing to prevent freezing.

[0043] See Figure 1 and Figure 4 In this embodiment of the antifreeze device, the antifreeze device also includes a drain pipe 5, which is connected to the liquid storage chamber 24 to discharge the fluid in the liquid storage chamber 24. With the drain pipe 5 positioned below the blocking component 2, some jet diffusion occurs at the outlet of the heat exchange tube 11, and some jet also flows into the liquid storage chamber 24. The fluid flowing into the liquid storage chamber 24 is discharged through the drain pipe 5, facilitating subsequent testing.

[0044] See Figure 1 and Figure 4 In the antifreeze device of this embodiment, the heat exchange tube 11 is a circular tube, and the inlet 22 is a circular through hole; the inner diameter of the heat exchange tube 11 is smaller than the diameter of the inlet 22. The inner diameter of the heat exchange tube 11 is slightly smaller than the diameter of the inlet 22, which facilitates the smooth entry of the heat exchange tube 11 into the receiving cavity 21 of the blocking component 2.

[0045] The compressor in this embodiment includes the antifreeze device described above, and is used as follows:

[0046] When the compressor is running normally, water sprays out from the outlet of heat exchange tube 11, passes through the receiving cavity 21 of the blocking component 2, and then flows into the diversion chamber 4 through the outlet 23 of the second connecting plate 26, and then flows from the diversion chamber 4 to the water storage tank 42. The inlet 22 of the first connecting plate 25 corresponds one-to-one with the heat exchange tube 11, and the diameter of the inlet 22 is slightly larger than the inner diameter of the heat exchange tube 11. A guide pipe / plate can be added to the outlet of the heat exchange tube 11 to reduce jet diffusion, and a certain proportion of scattered droplets are discharged through the drain pipe 5. When the liquid enters the diversion chamber 4, it flows through the wall deflection to the water storage tank 42. Since there is no solid connection between the water storage tank 42 and the diversion chamber 4, the ice water in the water storage tank 42 cannot climb the wall and flow back into the diversion chamber 4, and the diversion chamber 4 also prevents the water from flowing back into the receiving cavity 21 of the blocking component 2.

[0047] Because overcoming the energy barrier and freezing requires molecular-level energy fluctuations and perturbations, it is highly random. It is impossible to predict which tube(s) will freeze. For example... Figure 4 As shown, when a tube in the evaporator 1 freezes, the flow rate of that heat exchange tube 11 gradually decreases due to ice blockage. Therefore, the jet within the containment cavity 21 of the blocking component 2 gradually deviates from the outlet 23. Extensive splashing causes the liquid level at the bottom of the containment cavity 21 to rise rapidly, triggering the float valve response system. The system can then shut down and switch to a heating and de-icing mode or other anti-freezing measures. Therefore, a compressor equipped with an anti-freeze device can effectively respond to the occurrence of localized freezing in the shell-and-tube heat exchange tube 11, promptly preventing damage to the compressor.

[0048] Antifreeze devices can be used on general shell and tube evaporators to prevent evaporators from freezing in extreme weather conditions, and can also be used on flooded evaporators and falling film evaporators.

[0049] The number, diameter, shape, and distribution of the inlet 22 of the first connecting plate 25 and the outlet 23 of the second connecting plate 26 are selected according to the actual usage requirements of the evaporator 1. This invention provides the following configuration methods, but is not limited to them.

[0050] Example 1

[0051] The outlet of the heat exchange tube 11 is connected to the middle position of the first connecting plate 25, forming a uniformly distributed circular hole on the longitudinal axis of symmetry of the first connecting plate 25. This circular hole is the inlet 22 of the first connecting plate 25 (e.g., Figure 5 (As shown). Accordingly, a uniformly distributed circular hole is neatly arranged along the longitudinal axis of symmetry of the second connecting plate 26. This circular hole serves as the outlet of the second connecting plate 26 (as shown). Figure 6 (As shown), it is also the nozzle from which the fluid in the receiving cavity 41 is ejected outward. In this way, the heat exchange tubes 11 are neatly arranged on one side of the blocking component 2.

[0052] Example 2

[0053] If the tube freezes, the jet inside the receiving cavity 21 may sometimes be ejected from the cavity along with the jet from the adjacent outlet 23, which can easily affect the measurement results and monitoring effectiveness. To avoid this, the inlet 22 of the first connecting plate 25 is configured as irregularly arranged circular holes (e.g., Figure 7 (As shown). When the pipe freezes, the flow velocity of the jet entering the receiving cavity 21 decreases significantly, gradually deviating from the outlet 23 of the second connecting plate 26. Since the adjacent outlets 23 are irregularly arranged, the jet is sprayed onto the second connecting plate 26, and then flows along the second connecting plate 26 into the liquid storage cavity 24. When the specified liquid level is reached, the response system is triggered. This arrangement of the inlet 22, to a certain extent, avoids the jet from exiting from other outlets 23 and affecting the monitoring effect.

[0054] Example 3

[0055] Sometimes there are many heat exchange tubes 11, but the space for the blocking component 2 is limited. In this case, the inlet 22 can be arranged in two rows on the first connecting plate 25, with the two rows staggered, to make full use of the effective area of ​​the first connecting plate 25 and the second connecting plate 26 (e.g., Figure 8 (As shown). Depending on actual usage requirements, the inlet 22 and outlet 23 can also be arranged in multiple rows to achieve the connection between the blocking component 2 and multiple heat exchange tubes 11.

[0056] Example 4

[0057] Normally, the fluid velocity and flow rate are higher in the middle. To accommodate the higher flow rate, the first connecting plate 25 is positioned with a larger diameter inlet 22 near the middle, and the diameter of the inlet 22 is gradually reduced towards both ends (e.g., ...). Figure 9 (As shown). Thus, a thicker heat exchange tube 11 is connected in the middle, and a thinner heat exchange tube 11 is connected at both ends.

[0058] Import 22 and the corresponding export 23 can be circular, oval, square, hexagonal or other irregular shapes.

[0059] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0060] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0061] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0062] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0063] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A freeze protection device, characterized in that, The application relates to an anti-freezing device for an evaporator. The anti-freezing device comprises an evaporator (1) having a plurality of heat exchange pipes (11) for circulating refrigerant; a plurality of the heat exchange pipes (11) are arranged at intervals; a blocking component (2) connected with the evaporator (1), the blocking component (2) having a containing cavity (21) and an inlet (22) and an outlet (23) communicating with the containing cavity (21), the inlet (22) being arranged corresponding to the water outlets of the plurality of heat exchange pipes (11) so that the fluid in the plurality of heat exchange pipes (11) flows out from the outlet (23) after passing through the containing cavity (21); the containing cavity (21) comprises a circulating cavity (28) for the fluid in the heat exchange pipes (11) to flow through and a liquid storage cavity (24) communicating with the circulating cavity (28), the liquid storage cavity (24) being arranged below the circulating cavity (28); and a measuring device (3) arranged in the circulating cavity (28), the measuring device (3) being used for measuring the volume of the fluid in the liquid storage cavity (24). The inlet (22) is in one-to-one correspondence with the liquid outlets of the plurality of heat exchange pipes (11); the outlet (23) is in one-to-one correspondence with the plurality of inlets (22). The blocking component (2) comprises a first connecting plate (25) and a second connecting plate (26) arranged oppositely, the inlet (22) is arranged on the first connecting plate (25), and the outlet (23) is arranged on the second connecting plate (26).

2. The freeze protection apparatus of claim 1, wherein The blocking component (2) comprises a bottom shell (27) connected with the first connecting plate (25) and the second connecting plate (26), the bottom shell (27) has a containing groove (271) for containing fluid, and the containing groove (271) communicates with the liquid storage cavity (24).

3. The freeze protection apparatus of claim 1, wherein, The groove bottom of the containing groove (271) is in a spherical structure.

4. The freeze protection apparatus of claim 3, wherein, The anti-freezing device further comprises:

5. The freeze protection apparatus of claim 4, wherein, a drainage chamber (4) connected with the second connecting plate (26), the drainage chamber (4) comprising a drainage cavity (41) communicating with the inlet (22) and a drainage port (411) communicating with the drainage cavity (41), the side wall of the drainage cavity (41) being used for blocking the fluid flowing out from the outlet (23) so that the fluid flows out from the drainage port (411) after passing through the side wall of the drainage cavity (41); and a water storage pool (42) arranged below the drainage port (411) to contain the fluid flowing out from the drainage port (411).

6. The freeze protection apparatus of claim 3, wherein, The measuring device (3) comprises a liquid level sensor, the volume of the fluid in the liquid storage cavity (24) is obtained by measuring the liquid level of the fluid in the liquid storage cavity (24) through the liquid level sensor. ​ ​ 7. The freeze protection apparatus of claim 1, wherein ​ 8. The freeze protection apparatus of claim 1, wherein, The anti-freezing device further comprises a drain pipe (5) in communication with the liquid storage cavity (24) to drain the fluid in the liquid storage cavity (24) out of the liquid storage cavity (24) through the drain pipe (5).

9. The freeze protection apparatus of claim 1, wherein, The heat exchange pipe (11) is a circular pipe, and the inlet (22) is a circular through hole; the inner diameter of the heat exchange pipe (11) is smaller than the diameter of the inlet (22).

10. A compressor comprising a freeze prevention device, characterized in that, The anti-freezing device is the anti-freezing device according to any one of claims 1 to 9.

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