A chilled water device

Abstract

This invention relates to the field of chillers, and more particularly to a chilled water device. Technical solution: It includes an interconnected liquid storage system and a heat exchange system. The liquid storage system includes a tank with an outlet and a replenishment port. The tank is connected to the heat exchange system via a liquid inlet assembly. A filter assembly, which interfaces with the liquid inlet assembly, is installed inside the tank to filter the circulating medium flowing into the tank. Technical effect: This device reduces backwashing time and improves the cleaning effect on the filter screen, avoiding system flow and temperature fluctuations caused by traditional long-term backwashing.

Description

Technical Field

[0001] This invention relates to the field of water chillers, and more particularly to a water chiller device. Background Technology

[0002] A chiller (also known as a freezer, refrigeration unit, or ice water unit) is an industrial device that outputs controllable low-temperature chilled water through a refrigeration cycle. Its core function is to provide precise temperature control for various processes.

[0003] To ensure the cleanliness of the cooling medium, existing chillers generally have filters installed in the circulation system. However, after long-term use, impurities will accumulate on the filters, leading to a decrease in filtration efficiency, and they need to be backwashed and cleaned regularly.

[0004] Existing backwashing methods are mostly simple reverse liquid flow flushing, which is not very effective at cleaning stubborn impurities that are tightly attached to the filter screen surface.

[0005] Furthermore, thorough cleaning often requires extended backwashing time. During this period, the main circulation flow is forced to decrease or be interrupted, which not only causes fluctuations in the flow and pressure of the cooling circulation, but also directly affects the temperature control accuracy and process stability of external cooled equipment (such as precision lasers and semiconductor manufacturing equipment). Summary of the Invention

[0006] The purpose of this invention is to provide a cold water device that solves the problem of poor cleaning effect caused by pressure fluctuations in the circulating fluid during cleaning when the filter screen is tightly adhered to it.

[0007] To achieve this objective, the present invention adopts the following technical solution: a cold water device, comprising a liquid storage system and a heat exchange system interconnected with each other, the liquid storage system comprising a tank having an outlet and a replenishment outlet; the tank being connected to the heat exchange system via an inlet assembly; and a filter assembly disposed within the tank and connected to the inlet assembly to filter the circulating medium flowing into the tank.

[0008] The liquid inlet component includes a liquid supply channel and a backflushing channel that are connected to the heat exchange system. The two are connected to the filter component through switches that can be opened and closed independently, and the backflushing channel is provided with a drain outlet.

[0009] The filtration assembly includes a flow tube that communicates with all the switching elements and a filter element disposed therein.

[0010] The filter element includes a fixing ring disposed inside the drainage tube, and multiple elastic clips are disposed on the side wall facing the liquid inlet assembly, and the multiple elastic clips are connected to the filter screen together;

[0011] During operation, when the circulating medium flows into the backwash channel, the elastic clip is subjected to force and undergoes elastic deformation, which in turn causes the filter screen to deform.

[0012] The liquid storage system also includes a heating rod installed inside the tank and a temperature detector electrically connected to it;

[0013] Among them, the temperature detector is used to monitor the temperature of the circulating medium inside the chamber, and the heating rod is used to heat the circulating medium;

[0014] The end of the drainage tube furthest from the liquid inlet assembly extends towards the heating rod to form a covering section.

[0015] The covering section covers at least a portion of the heating rod, and there is a gap between the inner wall of the covering section and the outer periphery of the heating rod to form a flow space;

[0016] The filter assembly also includes several scraper rings spaced apart along the axis of the heating rod, with their inner ring surfaces abutting against the outer wall of the heating rod.

[0017] Several scraping rings are connected to a moving rod, one end of which is connected to a fixed ring, and the fixed ring is slidably connected to the drainage tube;

[0018] The fixing ring has a notch that extends to the outer periphery of the bottom of the fixing ring and penetrates the outer periphery.

[0019] Compared with the prior art, the present invention has the following beneficial effects: by operating this device, the backwashing time is reduced and the cleaning effect on the filter screen is improved, avoiding the system flow and temperature fluctuations caused by traditional long-term backwashing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0022] Figure 1 This is a schematic diagram of the structure of a chilled water equipment;

[0023] Figure 2 A schematic diagram of the liquid storage system of a cold water equipment;

[0024] Figure 3This is a cross-sectional view of the first type of liquid storage system for a chilled water equipment.

[0025] Figure 4 This is a cross-sectional view of the second type of liquid storage system for a chilled water equipment;

[0026] Figure 5 This is a schematic diagram of the liquid inlet assembly and filter assembly of a chilled water equipment.

[0027] Figure 6 This is a cross-sectional view of the filter assembly of a chilled water system.

[0028] Figure 7 A diagram showing the operating status of the liquid storage system in a chilled water system.

[0029] Figure 8 This is a diagram showing the working state of the first type of filter element in a chilled water system.

[0030] Figure 9 This is a schematic diagram of the filter element structure of a cold water equipment.

[0031] Figure 10 This is a diagram showing the working state of the second type of filter element in a chilled water system.

[0032] Figure 11 This is a schematic diagram of the fixed ring structure of a chilled water equipment;

[0033] Figure 12 This is a diagram showing the operating status of the switching components of a chilled water system.

[0034] Diagram description: Liquid storage system 100, heat exchange system 200, tank 1, liquid outlet 1a, liquid replenishment port 1b, liquid inlet assembly 2, filter assembly 3, liquid supply channel 21, backflushing channel 22, switch 23, drain port 22a, guide tube 31, filter element 32, fixing ring 321, elastic clip 322, filter screen 323.

[0035] Pressure detector 33

[0036] 4. Heating rod; 5. Temperature detector

[0037] Covering segment 31a,

[0038] Scraper ring 34, Moving rod 35

[0039] Flow spacing 323a

[0040] Gap 321a. Detailed Implementation

[0041] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0042] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] This invention provides a water cooling device, such as... Figures 1-12 As shown, the system includes a liquid storage system 100 and a heat exchange system 200 that are interconnected. The liquid storage system 100 includes a tank 1 with an outlet 1a and a replenishment outlet 1b. The tank 1 is connected to the heat exchange system 200 through a liquid inlet assembly 2. A filter assembly 3 is installed inside the tank 1 and is connected to the liquid inlet assembly 2 to filter the circulating medium flowing into the tank 1.

[0045] The liquid inlet component 2 includes a liquid supply channel 21 and a backflushing channel 22 that are connected to the heat exchange system 200. The two are connected to the filter component 3 through a switch 23 that can be opened and closed independently. The backflushing channel 22 is provided with a drain outlet 22a.

[0046] The filter assembly 3 includes a flow tube 31 that communicates with all the switching elements 23 and a filter element 32 disposed therein;

[0047] The filter element 32 includes a fixing ring 321 disposed inside the flow tube 31, and a plurality of elastic clips 322 are disposed on the side wall of the liquid inlet assembly 2, and the plurality of elastic clips 322 are connected to a filter screen 323.

[0048] During operation, when the circulating medium flows to the backwash channel 22, the elastic card 322 is subjected to force and undergoes elastic deformation, which in turn causes the filter screen 323 to deform.

[0049] Specifically, before the device is put into operation, the outlet 1a is connected to the circulating liquid inlet of an external device (such as a liquid cooler for semiconductor manufacturing equipment or laser) through a connecting pipe, and the inlet of the heat exchange system 200 is connected to the outlet of the external device. At the same time, the replenishment port 1b is connected to a preset pure circulating liquid supply container.

[0050] When this device is working, the high-temperature hot circulating fluid (such as water, ethylene glycol aqueous solution, etc.) generated by the external equipment flows back to the heat exchange system 200. The heat exchange system 200 uses its internal refrigerant (such as Freon) to cool the high-temperature circulating fluid, forming a cooled circulating fluid. The cooled circulating fluid flows into the tank 1 through the liquid inlet component 2.

[0051] At this time, as Figure 4 and 5 As shown, the switch 23 located in the liquid supply channel 21 is in the open state, while the switch 23 in the backflushing channel 22 is in the closed state. The circulating liquid flows into the tank 1 through the liquid supply channel 21 and passes through the filter assembly 3, which intercepts and separates the impurities (such as metal scraps, scale particles, etc.) carried in the circulating liquid. The filtered clean circulating liquid enters the tank 1 and finally flows to the external equipment through the liquid outlet 1a to complete the continuous cooling cycle.

[0052] Furthermore, a water level detector (not shown in the figure) is installed inside the tank 1. When the operation of the equipment causes the circulating fluid to be lost and the liquid level in the tank 1 is lower than the preset threshold, the water level detector sends a signal. This signal controls the liquid supply container (with a preset pump inside) connected to the liquid replenishment port 1b to work and pump pure circulating fluid into the tank 1 through the liquid replenishment port 1b to ensure sufficient circulating fluid and ensure the continuity and stability of the cooling process.

[0053] Furthermore, during long-term operation, the intercepted impurities will gradually accumulate and adhere to the liquid inlet side of filter screen 323, affecting its filtration.

[0054] To solve this problem, the internal flow channel of the liquid inlet component 2 is switched periodically, that is, the switch 23 of the liquid supply channel 21 is closed, and the switch 23 of the backflushing channel 22 is opened at the same time. The external sewage pump (not shown in the figure) connected to the backflushing channel 22 through the sewage outlet 22a is started. At this time, some of the circulating liquid in the tank 1 flows in reverse through the filter component 3 under the action of pressure difference.

[0055] Specifically, such as Figure 7 and 8 As shown, the circulating liquid flows backward through the clean side (original outlet side) of the filter screen 323 and towards its inlet side. This process is called "backwashing". The reverse-flowing circulating liquid washes away the impurities attached to the filter screen 323.

[0056] Furthermore, to improve backwashing efficiency, the key to this device lies in, such as Figure 8-10As shown, the filter element 32 is provided with elastic clips 322. Multiple elastic clips 322 are arranged in a ring at intervals on the fixing ring 321, and the whole is facing the liquid inlet component 2. It is similar to a clip-on mechanism. The edge of the filter screen 323 is fixed to the end of all the elastic clips 322.

[0057] In normal operating mode, the circulating liquid enters the housing 1 through the liquid supply channel 21. The direction of the circulating liquid flow is opposite to the pre-deformation direction of the elastic card 322. At the same time, the end of the elastic card 322 is abutted by the fixing ring 321 to form a stable limit. At this time, the elastic card 322 will not cause the filter screen 323 to deform.

[0058] In backwash mode, the reverse-flowing circulating fluid impacts the elastic clip 322, overcoming its elasticity and the limiting constraint of the fixing ring 321. Figure 8 and 10 As shown, the elastic card 322 rapidly opens in the direction of liquid flow;

[0059] At this time, the rapid elastic deformation of the elastic card 322 instantly transfers kinetic energy to the filter screen 323, causing the filter screen 323 to shake, thereby breaking the adhesion between the impurities and the surface of the filter screen 323, causing the impurities to fall off quickly. The shaken-off impurities are then quickly discharged through the backwash channel 22.

[0060] And when the backwashing is completed and the circulating fluid returns to the normal flow direction, the elastic card 322 is impacted and then bounces back to the initial state, ready for the next working cycle;

[0061] This reduces backwashing time and improves the cleaning effect on filter 323, avoiding system flow and temperature fluctuations caused by traditional long backwashing times.

[0062] Preferably, the flow cross-sectional area of ​​the replenishment port 1b is not less than the sum of the flow cross-sectional area of ​​the outlet port 1a and the equivalent flow cross-sectional area of ​​the inlet component 2.

[0063] Specifically, during backwashing, a portion of the circulating fluid is diverted from the main circulation for drainage. To prevent this from reducing the flow rate and pressure of the circulating medium entering external equipment, thus affecting the cooling effect,

[0064] Therefore, when the backwashing mode is started, the liquid supply container replenishes circulating liquid to the tank 1 from the liquid replenishment port 1b in real time, and the replenished circulating liquid is at least equal to the sum of the circulating liquid flow rate output from the liquid outlet 1a to the external equipment and the circulating liquid flow rate discharged from the backwash channel 22 at the same time.

[0065] In this way, the total amount of circulating fluid in the tank 1 remains constant, thereby avoiding flow fluctuations and ensuring temperature control of external equipment.

[0066] Preferably, the drain outlet 22a is connected to the backwash channel 22, and the end of the drain outlet 22a near the backwash channel 22 is connected to the bottom wall of the backwash channel 22 to quickly discharge impurities.

[0067] Specifically, such as Figure 7 As shown, the drain outlet 22a is located at the bottom of the backwash channel 22 to facilitate the removal of impurities deposited in the backwash channel 22.

[0068] Preferably, the filter assembly 3 includes a pressure detector 33 disposed inside the drainage tube 31, and is disposed on the side of the filter element 32 near the liquid inlet assembly 2.

[0069] Specifically, because the filter screen 323 cannot be cleaned immediately by periodically switching the internal flow channels of the liquid inlet assembly 2 (i.e., closing the switch 23 of the liquid supply channel 21 while opening the switch 23 of the backflushing channel 22),

[0070] Therefore, the filter assembly 3 is equipped with a pressure detector 33. Before the device is put into operation, the pressure detector 33 is connected to the external liquid supply container. During operation, the pressure detector 33 continuously monitors the pressure value on the side of the filter element 32 near the liquid inlet assembly 2. When impurities accumulate and cause the filter screen 323 to become clogged, the pressure will increase significantly with the increase of fluid resistance. When the pressure value exceeds the preset threshold, the pressure detector 33 immediately generates an electrical signal and transmits it to the liquid supply container, automatically triggering backwashing. At the same time, the switch 23 of the liquid supply channel 21 is closed, the switch 23 of the backwash channel 22 is opened, and the external sewage pump is started. After a preset time (such as 3-7 seconds), the device closes the backwashing mode and returns to the normal working mode. In this way, the filter screen 323 can be cleaned quickly and instantly.

[0071] Preferably, the liquid storage system 100 further includes a heating rod 4 disposed inside the housing 1 and a temperature detector 5 electrically connected thereto;

[0072] Among them, temperature detector 5 is used to monitor the temperature of the circulating medium inside the chamber 1, and heating rod 4 is used to heat the circulating medium.

[0073] Specifically, to achieve precise temperature management of the circulating medium, the chamber 1 is equipped with a heating rod 4 and a temperature detector 5. The temperature detector 5 monitors the temperature of the circulating medium inside the chamber in real time.

[0074] When the circulating fluid temperature is lower than the preset temperature, the temperature detector 5 sends a signal to the heating rod 4 to drive it to work, thereby heating the circulating fluid in the tank 1.

[0075] To avoid the heat exchange system 200 from becoming too cold due to inertia, a slight compensation heating is performed to maintain a constant set temperature, reduce temperature fluctuations, and improve the process stability of the cooled equipment (such as precision lasers or semiconductor manufacturing devices).

[0076] Preferably, the end of the drainage tube 31 away from the liquid inlet assembly 2 extends towards the heating rod 4 to form a covering section 31a.

[0077] The covering section 31a covers at least a portion of the heating rod 4, and there is a gap between the inner wall of the covering section 31a and the outer periphery of the heating rod 4 to form a flow space.

[0078] Preferably, the inner wall of the drainage tube 31 is a continuous curved surface so that the circulating medium can be uniformly heated in contact with the heating rod 4.

[0079] Specifically, in actual operation, the capacity of the circulating medium inside tank 1 needs to be 3-4 times the actual amount of circulating fluid used. However, this causes the circulating fluid to directly disperse in the original circulating fluid when it enters tank 1, preventing it from fully contacting the heating rod 4, thus reducing heating efficiency.

[0080] Therefore, the flow tube 31 is provided with a covering section 31a. The covering section 31a is used to enable the circulating medium to flow along the flow space, thereby increasing the contact area between the circulating medium and the heating rod 4 and thus improving the heating efficiency.

[0081] Preferably, the filter assembly 3 further includes a plurality of scraper rings 34 spaced apart along the axial direction of the heating rod 4, and the inner ring surface of the scraper rings abuts against the outer wall of the heating rod 4.

[0082] Several scraping rings 34 are connected to a moving rod 35, one end of which is connected to a fixed ring 321, and the fixed ring 321 is slidably connected to the drainage tube 31.

[0083] Specifically, even after the circulating fluid is filtered by filter element 32, trace impurities will still remain. After long-term operation, scale will form on the surface of heating rod 4, thus affecting its working efficiency.

[0084] Therefore, as Figure 6 As shown, the filter assembly 3 is also provided with several scraping rings 34. When backwashing is performed, the circulating liquid impacts the fixed ring 321 and the filter screen 323. At this time, since the fixed ring 321 and the guide tube 31 are slidably connected, they move along the direction of the circulating liquid flow. At this time, the fixed ring 321 pulls several scraping rings 34 to scrape the surface of the heating rod 4 through the moving rod 35. This can avoid the problem of impurities adhering to the heating rod 4 and causing scaling.

[0085] Preferably, when the elastic card 322 undergoes elastic deformation, it can cause the side edge of the filter screen 323 to generate a flow gap 323a with the flow tube 31.

[0086] Preferably, the bottom of the fixing ring 321 has a notch 321a, and the notch 321a extends to the outer peripheral edge of the bottom of the fixing ring 321 and penetrates the outer peripheral edge.

[0087] Specifically, when the scraper ring 34 scrapes the surface of the heating rod 4 and the attached material is scraped off, the circulating fluid impact has caused the elastic card 322 to open outward (i.e., in the direction of fluid flow), and the filter screen 323 and the guide tube 31 generate a flow gap 323a. At this time, the attached material can be discharged from the flow gap 323a to the backwash channel 22 to avoid the attachment material accumulating on the side of the filter screen 323 near the heating rod 4.

[0088] Furthermore, because some of the attached material is blocked by the fixing ring 321 during flow and eventually accumulates on one side of the bottom of the fixing ring 321, a notch 321a is provided at the bottom of the fixing ring 321 so that the accumulated attached material can be quickly discharged.

[0089] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water cooling device, characterized in that, It includes a liquid storage system (100) and a heat exchange system (200) that are interconnected. The liquid storage system (100) includes a tank (1) which is provided with an outlet (1a) and a replenishment port (1b). The tank (1) is connected to the heat exchange system (200) through a liquid inlet assembly (2). A filter assembly (3) is provided inside the tank (1) and is connected to the liquid inlet assembly (2) to filter the circulating medium flowing into the tank (1). The liquid inlet component (2) includes a liquid supply channel (21) and a backflushing channel (22) connected to the heat exchange system (200). The two are connected to the filter component (3) through a switch (23) that can be opened and closed independently. The backflushing channel (22) is provided with a drain outlet (22a). The filter assembly (3) includes a drain tube (31) that communicates with all the switches (23) and a filter element (32) disposed therein. The filter element (32) includes a fixing ring (321) disposed inside the drainage tube (31), and multiple elastic clips (322) are disposed on the side wall facing the liquid inlet assembly (2), and the multiple elastic clips (322) are connected to a filter screen (323). During operation, when the circulating medium flows to the backwash channel (22), the elastic clip (322) is subjected to force and undergoes elastic deformation, which in turn causes the filter screen (323) to deform. The liquid storage system (100) also includes a heating rod (4) disposed inside the housing (1) and a temperature detector (5) electrically connected thereto. Among them, the temperature detector (5) is used to monitor the temperature of the circulating medium inside the box (1), and the heating rod (4) is used to heat the circulating medium; The drainage tube (31) extends from the end away from the liquid inlet assembly (2) toward the heating rod (4) to form a covering section (31a). The covering section (31a) covers at least a portion of the heating rod (4), and there is a gap between the inner wall of the covering section (31a) and the outer periphery of the heating rod (4) to form a flow space; The filter assembly (3) also includes a plurality of scraper rings (34) spaced apart along the axis of the heating rod (4), and their inner ring surfaces abut against the outer wall of the heating rod (4); Several scraping rings (34) are connected to a moving rod (35), and one end of the moving rod (35) is connected to a fixed ring (321), and the fixed ring (321) is slidably connected to the drainage tube (31); The fixing ring (321) has a notch (321a) that extends to the outer periphery of the bottom of the fixing ring (321) and penetrates the outer periphery.

2. The chilled water equipment according to claim 1, characterized in that, The flow cross-sectional area of ​​the replenishment port (1b) is not less than the sum of the flow cross-sectional area of ​​the outlet port (1a) and the equivalent flow cross-sectional area of ​​the inlet component (2).

3. The chilled water equipment according to claim 1, characterized in that, The drain outlet (22a) is connected to the backwash channel (22), and the end of the drain outlet (22a) near the backwash channel (22) is connected to the bottom wall of the backwash channel (22) to quickly discharge impurities.

4. The chilled water equipment according to claim 1, characterized in that, The filter assembly (3) includes a pressure detector (33) disposed inside the drainage tube (31) and disposed on the side of the filter element (32) near the liquid inlet assembly (2).

5. The chilled water equipment according to claim 1, characterized in that, The inner wall of the drainage tube (31) is set with a continuous curved surface so that the circulating medium can be uniformly heated in contact with the heating rod (4).

6. The chilled water equipment according to any one of claims 1-5, characterized in that, When the elastic card (322) undergoes elastic deformation, it can cause the side edge of the filter screen (323) to generate a flow gap (323a) with the flow tube (31).

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