A dual compressor chilled water heat pump unit

Abstract

The present invention relates to the technical field of heat pump units, specifically a dual-compressor chilled water heat pump unit, comprising a unit box, a compressor fixedly connected to the edge of the lower surface of the unit box, an evaporator fixedly connected to the lower surface of the unit box near the compressor, a condenser fixedly connected to the lower surface of the unit box near the evaporator, two air inlet pipes connected through the lower end of the inner surface of the compressor, one end of each of the two air inlet pipes fixedly connected to a cylinder, and an oil inlet pipe connected through the center of the lower surface of the compressor. The present invention can use a cleaning mechanism to clean metal chips, effectively reducing the number of metal chips entering the winding cavity with the airflow, avoiding the problem of metal chips attached to the winding causing a power short circuit, increasing the service life of the equipment, reducing the possibility of heat pump unit malfunction and damage caused by a compressor motor short circuit, and reducing production costs.

Description

Technical Field

[0001] The invention relates to the technical field of heat pump units, in particular to a dual-compressor chilled water heat pump unit. Background Art

[0002] The chiller consists of four main components: compressor, evaporator, condenser, and some metering devices, which are realized by different refrigerants in the form of a vapor compression refrigeration cycle. Absorption chillers use water as a refrigerant and rely on the strong affinity between water and lithium bromide solution to achieve the refrigeration effect. Chillers are generally used in air conditioning units and industrial cooling. In air conditioning systems, chilled water is usually distributed to heat exchangers or coils in air handling units or other types of terminal equipment for cooling in their respective spaces, and then the cooling water is redistributed back to the condenser to be cooled;

[0003] The water-cooled chiller uses a shell and tube evaporator to exchange heat between water and refrigerant. After the refrigerant system absorbs the heat load in the water and cools the water to produce cold water, the heat is brought to the shell and tube condenser through the action of the compressor. The refrigerant and water exchange heat, and the water absorbs the heat and then takes the heat out of the external cooling tower through the water pipe to dissipate it.

[0004] At the beginning, the compressor sucks in the low-temperature and low-pressure refrigerant gas after evaporation and refrigeration, and then compresses it into high-temperature and high-pressure gas and sends it to the condenser; the high-pressure and high-temperature gas is cooled by the condenser to condense the gas into a normal-temperature and high-pressure liquid; when the normal-temperature and high-pressure liquid flows into the thermal expansion valve, it is throttled into a low-temperature and low-pressure wet steam, and then flows into the shell and tube evaporator, absorbing the heat of the chilled water in the evaporator to reduce the water temperature; the evaporated refrigerant is sucked back into the compressor, and the next refrigeration cycle is repeated;

[0005] In the compressor, the return air and normal return oil directly enter the first stage (low-pressure stage) cylinder, and after compression, enter the motor cavity through the medium-pressure pipe to cool the winding, and then enter the second stage (high-pressure stage cylinder) like an ordinary single-stage compressor. The return air contains lubricating oil, which has made the compression process very cautious. If there is return liquid, the valve plate of the first stage cylinder can be easily broken. The broken valve plate can enter the winding after passing through the medium-pressure pipe, which is prone to motor short circuit caused by metal chips. The short circuit of the compressor motor will cause the heat pump unit to fail, and even damage and scrap the heat pump unit.

[0006] Therefore, a dual compressor chiller heat pump unit is proposed. Summary of the invention

[0007] The object of the present invention is to provide a dual compressor chiller heat pump unit to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A dual-compressor chilled water heat pump unit, comprising a unit box, a compressor is fixedly connected to the edge of the lower surface of the unit box, an evaporator is fixedly connected to the lower surface of the unit box near the compressor, a condenser is fixedly connected to the lower surface of the unit box near the evaporator, two air inlet pipes are connected through the lower end of the inner surface of the compressor, one end of each of the two air inlet pipes is fixedly connected to a cylinder, an oil inlet pipe is connected through the center of the lower surface of the compressor, one end of the cylinder passes through the compressor and is fixedly connected to a cleaning mechanism, one end of the cleaning mechanism is fixedly connected to a medium-pressure pipe, one end of the medium-pressure pipe passes through the compressor and is fixedly connected to a winding cavity, and the winding cavity is fixedly connected to the center of the compressor;

[0010] The cleaning mechanism comprises an installation box, a cleaning tube, an elastic ring, a baffle plate, a fixing plate, a storage box, an inclined plate and a baffle plate, wherein one end of the cylinder is penetrated and connected with the installation box, and one end of the cylinder is penetrated and connected with the cleaning tube, the cleaning tube is a component with a U-shaped cross section, the lower end of the inner surface of the cleaning tube is embedded and connected with the fixing plate, the fixing plate is a component with pores evenly distributed on the surface, the upper surface of the fixing plate is fixedly connected with an elastic ring near the center position, the lower end of the inner surface of the cleaning tube relative to the position of the fixing plate is also fixedly connected with an elastic ring, the two elastic rings are staggered, and the outer surfaces of the two elastic rings are fixedly connected with baffle plates, a storage box is provided at the lower end of the interior of the installation box near the fixing plate, two inclined plates are symmetrically fixedly connected on both sides of the inner surface of the storage box, the two inclined plates are jointly fixedly connected with the baffle plate, the upper surface of the baffle plate is evenly provided with inclined through holes near the center position, and the cleaning tube passes through the installation box away from the cylinder and is fixedly connected with the medium-pressure tube.

[0011] In the compressor, the return air and normal return oil directly enter the first-stage (low-pressure stage) cylinder, and after compression, they enter the motor cavity through the medium-pressure pipe to cool the winding, and then enter the second-stage (high-pressure stage cylinder) like an ordinary single-stage compressor. The return air contains lubricating oil, which has made the compression process very cautious. If there is return liquid, the valve plate of the first-stage cylinder can be easily broken. The broken valve plate can enter the winding after passing through the medium-pressure pipe, which is prone to motor short circuit caused by metal chips. The short circuit of the compressor motor will cause the heat pump unit to fail, and even cause damage to and scrapping of the heat pump unit. The present invention sets a cleaning mechanism. During operation, the airflow will carry metal chips into the cleaning pipe. When the gas passes through the baffle plate, the metal chips carried by the airflow will be restricted by the baffle plate and blocked by the staggered baffle plates. When the airflow stops, the metal chips blocked by the baffle plate will pass through the pores of the fixed plate without the push of the airflow, and slide along the upper surface of the inclined plate to the upper surface of the baffle plate, and fall from the inclined through hole to the storage box. The setting angle of the oblique through hole is negative forty-five degrees with the airflow direction, which facilitates metal chips to pass through the oblique through hole from top to bottom while preventing metal chips from passing through the oblique through hole from bottom to top. The metal chips in the storage box will not be carried out of the storage box by the airflow due to the obstruction of the baffle plate. After a long period of work, when there is a lot of metal chips accumulated, the installation box can be removed and cleaned, which effectively reduces the amount of metal chips entering the winding cavity with the airflow, avoids the problem of metal chips adhering to the winding and causing a power short circuit, increases the service life of the equipment, reduces the possibility of failure and damage of the heat pump unit due to a short circuit in the compressor motor, and reduces the production cost.

[0012] Preferably, a first mounting ring is fixedly connected to a position near the medium-pressure pipe on the inner surface of the cleaning tube, four brackets are evenly and evenly fixedly connected to the inner surface of the first mounting ring in a ring shape at the center position, and a second mounting ring is fixedly connected to one end of the four brackets, a rotating rod is rotatably connected to the center position of the upper surface of the second mounting ring, a spiral leaf is fixedly connected to the center position of the outer surface of the rotating rod, a felt material component is laid on the outer surface of the spiral leaf, a rotating shaft is fixedly connected to the upper end of the rotating rod, and the rotating shaft passes through the cleaning tube and extends to the inside of the mounting box.

[0013] Due to the different volumes of metal chips, there are tiny metal particles in the metal chips. As the airflow moves, the tiny metal particles cannot be effectively blocked by the baffle plate and may still enter the medium-pressure pipe. The present invention arranges spiral blades. When passing through the spiral blades, the airflow pushes the blades to rotate, thereby realizing the rotation of the spiral blades. During the rotation process, the spiral blades use the rough felt on the outer surface to adsorb tiny metal chips such as copper powder, thereby preventing tiny metal chips from entering the medium-pressure pipe, further improving the cleaning effect of the cleaning mechanism, and preventing tiny copper powder from entering the medium-pressure pipe. The tiny copper powder is effectively prevented from entering the winding cavity through the medium-pressure pipe, thereby avoiding short circuit of the winding, further improving the safety of the compressor operation, further protecting the operation of the heat pump unit, and avoiding the problem of shutdown of the heat pump unit due to short circuit.

[0014] Preferably, two springs are symmetrically fixedly connected to the inner surface of the second mounting ring, one end of the two springs is commonly fixedly connected to a limit plate, and the limit plate is rotatably connected to the rotating rod.

[0015] The spiral blades wrap fine metal particles such as copper powder during rotation. Long-term work may cause a large amount of fine metal chips to accumulate on the surface of the spiral blades, affecting the spiral blades' continued adsorption of metal chips, reducing work efficiency and the adsorption effect. The present invention provides a spring, and when the airflow blows the spiral blades to rotate, the spiral blades move slightly upward, so that the spring is in an upward stretched state. After the airflow stops entering, the spiral blades fall due to gravity, and the spring will vibrate in the process of returning to their original state. The metal chips attached to the spiral blades will fall off due to the vibration of the spring and fall into the storage box, thereby realizing the recycling ability of the spiral blades, improving the spiral blades' ability to handle metal chips, and improving work efficiency.

[0016] Preferably, a magnetic attraction mechanism is rotatably connected to the center position of the outer surface of the rotating shaft, and the magnetic attraction mechanism includes a transmission belt, a fixed rod, a first roller, a permanent magnet and a collection box. The upper end of the outer surface of the rotating shaft passes through the cleaning tube and is rotatably connected to the transmission belt, one end of the transmission belt is rotatably connected to the fixed rod, the outer surface of the fixed rod is fixedly connected to the first roller, the outer surface of the first roller is fixedly connected to the permanent magnet, and the outer surface of the cleaning tube near the first roller is fixedly connected to the collection box.

[0017] During the treatment process of the cleaning mechanism, the baffle plate is occasionally required to cope with a large amount of metal chips, resulting in a high load strength of the baffle plate, which is easy to cause damage to the baffle plate and affect the cleaning effect of the cleaning mechanism. The metal chips contain magnetic metals. The present invention arranges a magnetic attraction mechanism, which will drive the rotating rod to rotate during the rotation of the spiral blade, and then rotate the rotating shaft. The rotation of the rotating shaft will rotate the transmission belt, and the rotation of the transmission belt will cause the first roller to rotate. During the rotation of the first roller, the permanent magnet is used to absorb the magnetic metal chips carried in the gas, and the edge of the storage box is scraped during the rotation to make the metal chips fall into the storage box, thereby reducing the load on the baffle plate, increasing the service life of the component, and improving the work efficiency.

[0018] Preferably, a connecting plate is fixedly connected to the upper end of the inner surface of the collection box near the first roller, and a cleaning head is rotatably connected to one end of the connecting plate, and the outer surface of the cleaning head is a component made of felt material.

[0019] When the first roller is rolling, it scrapes the permanent magnet against the surface of the collection box, causing metal chips to fall into the collection box. However, this process causes friction between the permanent magnet and the collection box, causing damage to the surface of the component, which can easily lead to an increase in the gap between the collection box and the permanent magnet. The present invention provides a cleaning head so that the permanent magnet scrapes against the cleaning head during rotation, causing metal chips on the surface of the permanent magnet to fall into the collection box, thereby reducing the probability of component damage and improving work efficiency.

[0020] Preferably, the lower surface of the inclined plate and the inner surface of the storage box are both paved with a protective pad, and the protective pad is a component made of felt material.

[0021] Taking into account that the storage box contains metal chips and is also impacted by airflow, which may cause the metal chips to rush out of the storage box, hindering the normal operation of the cleaning mechanism, the present invention provides a protective pad and uses felt as the protective pad material to increase the friction of the inner surface of the storage box, so that the metal chips adhere to the storage box, reduce the probability of metal chips flying out of the storage box, and improve the work quality.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention cleans metal chips by setting a cleaning mechanism, thereby effectively reducing the amount of metal chips entering the winding cavity with the airflow, avoiding the problem of metal chips adhering to the winding and causing a power short circuit, thereby increasing the service life of the equipment, reducing the possibility of functional failure and damage of the heat pump unit due to a short circuit of the compressor motor, and reducing the production cost.

[0024] 2. The present invention provides a magnetic attraction mechanism, utilizes a permanent magnet to absorb magnetic metal chips carried in the gas, and scrapes against the edge of the storage box during rotation, so that the metal chips fall into the storage box, reducing the load on the baffle plate, increasing the service life of the component, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 It is a cross-sectional view of the cleaning mechanism of the present invention;

[0028] Figure 4 It is an enlarged cross-sectional view of point A of the present invention;

[0029] Figure 5 It is a cross-sectional view along the AA direction of the present invention;

[0030] Figure 6 It is a cross-sectional view of the magnetic attraction mechanism of the present invention;

[0031] Figure 7 It is an enlarged cross-sectional view of point B of the present invention;

[0032] Figure 8 It is a main schematic diagram of the present invention;

[0033] Fig. 9 It is a cross-sectional view of the spoiler of the present invention.

[0034] In the figure: 1. unit box; 11. compressor; 12. cylinder; 13. oil inlet pipe; 14. medium pressure pipe; 15. winding cavity; 16. air inlet pipe; 17. evaporator; 18. condenser; 2. cleaning mechanism; 21. installation box; 22. cleaning pipe; 23. elastic ring; 24. baffle plate; 25. fixing plate; 26. storage box; 27. inclined plate; 28. baffle plate; 29. ​​first installation ring; 20. bracket; 211. second installation ring; 212. rotating shaft; 213. rotating rod; 214. limiting plate; 215. spring; 216. spiral leaf; 217. protective pad; 218. oblique through hole; 3. magnetic suction mechanism; 31. transmission belt; 32. fixing rod; 33. first roller; 34. permanent magnet; 35. collecting box; 36. connecting plate; 37. cleaning head. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] See also Figures 1 to 8 , the present invention provides a technical solution:

[0039] A dual compressor chiller heat pump unit, such as Figures 1 to 3 , Figure 8As shown, it includes a unit box 1, a compressor 11 is fixedly connected to the edge of the lower surface of the unit box 1, an evaporator 17 is fixedly connected to the lower surface of the unit box 1 near the compressor 11, a condenser 18 is fixedly connected to the lower surface of the unit box 1 near the evaporator 17, two air intake pipes 16 are connected through the lower end of the inner surface of the compressor 11, one end of the two air intake pipes 16 are fixedly connected to the cylinder 12, an oil inlet pipe 13 is connected through the center of the lower surface of the compressor 11, one end of the cylinder 12 penetrates the compressor 11 and is fixedly connected to a cleaning mechanism 2, one end of the cleaning mechanism 2 is fixedly connected to a medium-pressure pipe 14, one end of the medium-pressure pipe 14 penetrates the compressor 11 and is fixedly connected to a winding cavity 15, and the winding cavity 15 is fixedly connected to the center of the compressor 11;

[0040] The cleaning mechanism 2 includes a mounting box 21, a cleaning tube 22, an elastic ring 23, a baffle plate 24, a fixing plate 25, a storage box 26, an inclined plate 27 and a baffle plate 28. One end of the cylinder 12 is connected to the mounting box 21, and one end of the cylinder 12 is connected to the mounting box 21 and fixedly connected to the cleaning tube 22. The cleaning tube 22 is a component with a U-shaped cross section. The lower end of the inner surface of the cleaning tube 22 is embedded with a fixing plate 25. The fixing plate 25 is a component with pores evenly distributed on the surface. The upper surface of the fixing plate 25 is fixedly connected with an elastic ring 23 near the center position. The inner surface of the cleaning tube 22 is a component with a U-shaped cross section. The fixing plate 25 is embedded with a fixing plate 25. The fixing plate 25 is a component with pores evenly distributed on the surface. The fixing plate 25 is fixedly connected with an elastic ring 23 near the center position. An elastic ring 23 is also fixedly connected to the position of the lower end of the surface relative to the fixed plate 25. The two elastic rings 23 are staggered, and the outer surfaces of the two elastic rings 23 are fixedly connected to a blocking plate 24. A storage box 26 is provided at the lower end of the interior of the installation box 21 near the fixed plate 25. Two inclined plates 27 are symmetrically fixedly connected to the inner surface of the storage box 26 on both sides. The two inclined plates 27 are jointly fixedly connected to a spoiler 28. Oblique through holes 218 are evenly opened on the upper surface of the spoiler 28 near the center position. The end of the cleaning pipe 22 away from the cylinder 12 passes through the installation box 21 and is fixedly connected to the medium-pressure pipe 14.

[0041] In the compressor 11, the return air and normal return oil directly enter the first stage (low pressure stage) cylinder 12, and after compression, enter the motor cavity through the medium pressure pipe 14 to cool the winding, and then enter the second stage (high pressure stage cylinder 12) as in the ordinary single-stage compressor 11. The return air contains lubricating oil, which makes the compression process very delicate. If there is return liquid, the valve plate of the first stage cylinder 12 will be easily broken. The broken valve pieces can enter the winding after passing through the medium-pressure pipe 14, which is prone to motor short circuit caused by metal chips. The short circuit of the motor of the compressor 11 will cause the function of the heat pump unit to fail, and even cause damage to the heat pump unit and scrapping. The present invention sets a cleaning mechanism 2. During operation, the airflow will carry metal chips into the cleaning pipe 22. When the gas passes through the baffle plate 24, the metal chips carried by the airflow will be restricted by the baffle plate 24 and blocked by the staggered baffle plates 24. When the airflow stops, the metal chips blocked by the baffle plate 24 will pass through the pores of the fixed plate 25 without the push of the airflow, and slide along the upper surface of the inclined plate 27 to the upper surface of the baffle plate 28, and fall from the inclined through hole 218 to the storage In the box 26, the setting angle of the inclined through hole 218 is negative forty-five degrees with the airflow direction, which facilitates metal chips to pass through the inclined through hole 218 from top to bottom while preventing metal chips from passing through the inclined through hole 218 from bottom to top. The metal chips in the storage box 26 will not be carried out of the storage box 26 by the airflow due to the obstruction of the baffle plate 28. After a long period of work, when there is a lot of metal chips accumulated, the installation box 21 can be removed and cleaned, which effectively reduces the amount of metal chips entering the winding cavity 15 with the airflow, avoids the problem of metal chips adhering to the winding and causing a power short circuit, improves the service life of the equipment, reduces the possibility of functional failure and damage of the heat pump unit due to a short circuit in the compressor 11 motor, and reduces the production cost.

[0042] As an embodiment of the present invention, Figures 3 to 5 As shown, a first mounting ring 29 is fixedly connected to a position near the medium-pressure pipe 14 on the inner surface of the cleaning tube 22, and four brackets 20 are evenly and fixedly connected in a ring shape at the center position of the inner surface of the first mounting ring 29, and a second mounting ring 211 is fixedly connected to one end of the four brackets 20, and a rotating rod 213 is rotatably connected to the center position of the upper surface of the second mounting ring 211, and a spiral leaf 216 is fixedly connected to the center position of the outer surface of the rotating rod 213, and a felt material component is laid on the outer surface of the spiral leaf 216, and a rotating shaft 212 is fixedly connected to the upper end of the rotating rod 213, and the rotating shaft 212 passes through the cleaning tube 22 and extends to the inside of the mounting box 21.

[0043] Due to the different volumes of metal chips, there are fine metal particles in the metal chips. As the airflow moves, the fine metal particles cannot be effectively blocked by the baffle plate 24 and may still enter the medium-pressure pipe 14. The present invention provides a spiral blade 216. When passing through the spiral blade 216, the airflow pushes the blade to rotate, thereby realizing the rotation of the spiral blade 216. During the rotation process, the spiral blade 216 uses the rough felt on the outer surface to adsorb fine metal chips such as copper powder, thereby preventing fine metal chips from entering the medium-pressure pipe 14, further improving the cleaning effect of the cleaning mechanism 2, avoiding fine copper powder from entering the medium-pressure pipe 14, and effectively preventing fine copper powder from entering the winding cavity 15 through the medium-pressure pipe 14, avoiding short-circuiting of the winding, further improving the safety of the operation of the compressor 11, further protecting the operation of the heat pump unit, and avoiding the problem of shutdown of the heat pump unit due to short-circuiting.

[0044] As an embodiment of the present invention, Figure 5 As shown, two springs 215 are symmetrically fixedly connected to the inner surface of the second mounting ring 211 , and one end of the two springs 215 is commonly fixedly connected to a limit plate 214 , and the limit plate 214 is rotatably connected to the rotating rod 213 .

[0045] The spiral blade 216 wraps fine metal particles such as copper powder during rotation. Long-term operation may cause a large amount of fine metal chips to accumulate on the surface of the spiral blade 216, affecting the spiral blade 216 to continue to adsorb the metal chips, reducing the working efficiency and the adsorption effect. The present invention sets a spring 215. When the airflow blows the spiral blade 216 to rotate, the spiral blade 216 moves slightly upward, so that the spring 215 is in an upward stretched state. After the airflow stops, the spiral blade 216 falls due to gravity, and the spring 215 will also vibrate in the process of returning to its original state. The metal chips attached to the spiral blade 216 will fall under the vibration of the spring 215 and fall into the storage box 26, thereby realizing the recycling ability of the spiral blade 216, improving the spiral blade 216 The ability to handle metal chips and improving work efficiency.

[0046] As an embodiment of the present invention, Figure 2 , Figure 6 As shown, the magnetic attraction mechanism 3 is rotatably connected to the center position of the outer surface of the rotating shaft 212, and the magnetic attraction mechanism 3 includes a transmission belt 31, a fixed rod 32, a first roller 33, a permanent magnet 34 and a collection box 35. The upper end of the outer surface of the rotating shaft 212 passes through the cleaning tube 22 and is rotatably connected to the transmission belt 31. One end of the transmission belt 31 is rotatably connected to the fixed rod 32. The outer surface of the fixed rod 32 is fixedly connected to the first roller 33. The outer surface of the first roller 33 is fixedly connected to the permanent magnet 34. The outer surface of the cleaning tube 22 is fixedly connected to the collection box 35 near the first roller 33.

[0047] During the processing of the cleaning mechanism 2, the baffle plate 24 is occasionally required to cope with a large amount of metal chips, resulting in a high load strength of the baffle plate 24, which is easy to cause damage to the baffle plate 24 and affect the cleaning effect of the cleaning mechanism 2. The metal chips contain magnetic metals. The present invention sets a magnetic attraction mechanism 3. During the rotation of the spiral blade 216, the rotating rod 213 will be driven to rotate, and then the rotating shaft 212 will rotate. The rotation of the rotating shaft 212 will rotate the transmission belt 31, and the rotation of the transmission belt 31 will cause the first roller 33 to rotate. During the rotation of the first roller 33, the permanent magnet 34 is used to absorb the magnetic metal chips carried in the gas, and the edge of the storage box is scraped during the rotation, so that the metal chips fall into the storage box, thereby reducing the load of the baffle plate 24, increasing the service life of the component, and improving the work efficiency.

[0048] As an embodiment of the present invention, Figure 7 As shown, a connecting plate 36 is fixedly connected to the upper end of the inner surface of the collecting box 35 near the first roller 33, and a cleaning head 37 is rotatably connected to one end of the connecting plate 36. The outer surface of the cleaning head 37 is a felt material component.

[0049] When the first roller 33 is rolling, it scrapes the permanent magnet 34 and the surface of the collection box 35, causing metal chips to fall into the collection box 35. However, this process causes friction between the permanent magnet 34 and the collection box 35, causing damage to the surface of the component, which can easily lead to an increase in the gap between the collection box 35 and the permanent magnet 34. The present invention provides a cleaning head 37, so that the permanent magnet 34 scrapes against the cleaning head 37 during the rotation process, causing metal chips on the surface of the permanent magnet 34 to fall into the collection box, thereby reducing the probability of component damage and improving work efficiency.

[0050] As an embodiment of the present invention, Figure 2 As shown, the lower surface of the inclined plate 27 and the inner surface of the storage box 26 are both paved with a protective pad 217, and the protective pad 217 is a component made of felt material.

[0051] Taking into account that the storage box 26 contains metal chips and is also impacted by airflow, which may cause the metal chips to rush out of the storage box 26, hindering the normal operation of the cleaning mechanism 2. The present invention provides a protective pad 217 and uses felt as the material of the protective pad 217 to increase the friction of the inner surface of the storage box 26, so that the metal chips adhere to the storage box 26, reduce the probability of metal chips flying out of the storage box, and improve the work quality.

[0052] Method of use: At the beginning, the compressor 11 sucks in the low-temperature and low-pressure refrigerant gas after evaporation and refrigeration, and then compresses it into high-temperature and high-pressure gas and sends it to the condenser 18; the high-pressure and high-temperature gas is cooled by the condenser 18 to condense the gas into a normal-temperature and high-pressure liquid; when the normal-temperature and high-pressure liquid flows into the thermal expansion valve, it is throttled into a low-temperature and low-pressure wet steam, and then flows into the shell and tube evaporator 17, absorbing the heat of the chilled water in the evaporator 17 to reduce the water temperature; the evaporated refrigerant is then sucked back into the compressor 11, and the next refrigeration cycle is repeated; while the compressor 11 is working, the airflow will carry metal debris into the cleaning pipe 22, and when the gas passes through the baffle plate 24 The metal chips carried by the airflow will be restricted by the baffle plates 24 and blocked by the staggered baffle plates 24, while the remaining gas continues to move forward. When passing through the spiral blades 216, the airflow pushes the blades to rotate, thereby realizing the rotation of the spiral blades 216. At this time, the spiral blades 216 move upward slightly, so that the springs 215 are in an upwardly stretched state. During the rotation process, the spiral blades 216 use the rough felt on the outer surface to absorb fine metal chips such as copper powder, thereby preventing the fine metal chips from entering the medium-pressure pipe 14. During the rotation process of the spiral blades 216, the rotating rod 213 will be driven to rotate, thereby rotating the shaft 212, and the rotating shaft 21 2 will rotate the transmission belt 31, and the rotation of the transmission belt 31 will cause the first roller 33 to rotate. During the rotation process, the first roller 33 uses the permanent magnet 34 to absorb the magnetic metal chips carried in the gas, and scrapes with the cleaning head 37 during the rotation process, so that the metal chips fall into the storage box. When the airflow stops, the metal chips blocked by the baffle plate 24 will pass through the pores of the fixed plate 25 and slide along the upper surface of the inclined plate 27 to the upper surface of the baffle plate 28 without the push of the airflow, and fall into the storage box 26 from the inclined through hole 218. The setting angle of the inclined through hole 218 is negative forty-five degrees with the airflow direction. While facilitating the metal chips to pass through the oblique through hole 218 from top to bottom, the metal chips are prevented from passing through the oblique through hole 218 from bottom to top. The metal chips in the storage box 26 will not be carried out of the storage box 26 by the airflow due to the obstruction of the baffle plate 28 and the adsorption effect of the felt material of the protective pad 217 on the metal chips. At the same time, the spiral leaf 216 falls due to gravity, and the spring 215 will vibrate in the process of returning to its original state. The metal chips attached to the spiral leaf 216 will fall under the vibration of the spring 215 and fall into the storage box 26. After a long period of work, when there is a lot of metal chips accumulated, the installation box 21 can be removed and cleaned.

[0053] The electrical components appearing in this article are all connected to the external main controller and 220V AC power through a transformer, and the main controller can be a conventional known device that controls a computer, etc. The product model provided by the present invention is only used for the technical solution according to the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more matching and consistent with the technical solution of the present invention. It is a technical solution for the best application of the technical solution. The model of its product can be replaced and modified according to the required technical parameters, which is well known to technical personnel in this field. Therefore, technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual compressor chiller heat pump unit, comprising a unit box (1), characterized in that: A compressor (11) is fixedly connected to the edge of the lower surface of the unit case (1), an evaporator (17) is fixedly connected to the lower surface of the unit case (1) near the compressor (11), a condenser (18) is fixedly connected to the lower surface of the unit case (1) near the evaporator (17), two air intake pipes (16) are connected through the lower end of the inner surface of the compressor (11), one end of each of the two air intake pipes (16) is fixedly connected to a cylinder (12), an oil intake pipe (13) is connected through the center of the lower surface of the compressor (11), one end of the cylinder (12) passes through the compressor (11) and is fixedly connected to a cleaning mechanism (2), one end of the cleaning mechanism (2) is fixedly connected to a medium-pressure pipe (14), one end of the medium-pressure pipe (14) passes through the compressor (11) and is fixedly connected to a winding cavity (15), and the winding cavity (15) is fixedly connected to the center of the compressor (11); The cleaning mechanism (2) comprises a mounting box (21), a cleaning tube (22), an elastic ring (23), a baffle plate (24), a fixing plate (25), a storage box (26), an inclined plate (27) and a baffle plate (28); one end of the cylinder (12) is connected to the mounting box (21); one end of the cylinder (12) is connected to the mounting box (21) and fixedly connected to the cleaning tube (22); the cleaning tube (22) is a component with a U-shaped cross section; the lower end of the inner surface of the cleaning tube (22) is embedded with a fixing plate (25); the fixing plate (25) is a component with pores evenly distributed on the surface; the upper surface of the fixing plate (25) is fixedly connected with an elastic ring (23) near the center position; the lower end of the inner surface of the cleaning tube (22) relative to the fixing plate (25) is also fixedly connected with an elastic ring (23); the two elastic rings (23) are staggeredly distributed; the outer surfaces of the two elastic rings (23) are fixedly connected with a baffle plate (24), a storage box (26) is provided at a position near the fixing plate (25) at the lower end of the interior of the installation box (21), two inclined plates (27) are symmetrically fixedly connected to the inner surface of the storage box (26) on both sides, the two inclined plates (27) are commonly fixedly connected to a baffle (28), and the upper surface of the baffle (28) is evenly provided with inclined through holes (218) near the center position, and the end of the cleaning pipe (22) away from the cylinder (12) passes through the installation box (21) and is fixedly connected to the medium-pressure pipe (14); A first mounting ring (29) is fixedly connected to the inner surface of the cleaning tube (22) near the medium-pressure tube (14); four brackets (20) are evenly fixedly connected to the inner surface of the first mounting ring (29) in a circular shape at the center position; one end of the four brackets (20) is commonly fixedly connected to a second mounting ring (211); a rotating rod (213) is rotatably connected to the center position of the upper surface of the limiting plate (214); a spiral leaf (216) is fixedly connected to the outer surface of the rotating rod (213); a felt-made component is laid on the outer surface of the spiral leaf (216); a rotating shaft (212) is fixedly connected to the upper end of the rotating rod (213); the rotating shaft (212) passes through the cleaning tube (22) and extends to the inside of the mounting box (21); Two springs (215) are symmetrically fixedly connected to the inner surface of the second mounting ring (211), one end of the two springs (215) is commonly fixedly connected to a limit plate (214), and the limit plate (214) is rotatably connected to the rotating rod (213); A magnetic attraction mechanism (3) is rotatably connected at the center position of the outer surface of the rotating shaft (212), and the magnetic attraction mechanism (3) comprises a transmission belt (31), a fixed rod (32), a first roller (33), a permanent magnet (34) and a collection box (35); the upper end of the outer surface of the rotating shaft (212) passes through the cleaning tube (22) and is rotatably connected to the transmission belt (31); one end of the transmission belt (31) is rotatably connected to the fixed rod (32); the outer surface of the fixed rod (32) is fixedly connected to the first roller (33); the outer surface of the first roller (33) is fixedly connected to the permanent magnet (34); and the outer surface of the cleaning tube (22) is fixedly connected to the collection box (35) at a position close to the first roller (33); A connecting plate (36) is fixedly connected to the upper end of the inner surface of the collecting box (35) near the first roller (33); one end of the connecting plate (36) is rotatably connected to a cleaning head (37); the outer surface of the cleaning head (37) is a component made of felt material; When passing through the spiral blade (216), the airflow pushes the blade to rotate, thereby realizing the rotation of the spiral blade (216). At this time, the spiral blade (216) moves upward slightly, so that the spring (215) is in an upwardly stretched state. During the rotation process, the spiral blade (216) uses the rough felt on the outer surface to absorb small metal chips, thereby preventing the small metal chips from entering the medium-pressure pipe (14). During the rotation process of the spiral blade (216), the rotating rod (213) is driven to rotate, thereby rotating the rotating shaft (212). The rotation of the rotating shaft (212) causes the transmission belt (31) to rotate. The rotation of the transmission belt (31) causes the first roller (33) to rotate. During the rotation process, the first roller (33) uses the permanent magnet (34) to absorb the magnetic metal chips carried in the gas, and scrapes with the cleaning head (37) during the rotation process, so that the metal chips fall into the storage box; When the air flow stops, the spiral blade (216) falls due to gravity, and the spring (215) vibrates during the process of returning to its original state. The metal chips attached to the spiral blade (216) will fall due to the vibration of the spring (215) and fall into the storage box (26). After a long period of work, if there is a lot of metal chips accumulated, the installation box (21) can be removed and cleaned; The cleaning tube is a component with a U-shaped cross section.

2. A dual compressor chiller heat pump unit according to claim 1, characterized in that: The lower surface of the inclined plate (27) and the inner surface of the storage box (26) are both paved with a protective pad (217), and the protective pad (217) is a component made of felt material.

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