A water pump split type multi-contact system

Abstract

The application provides a water pump split type multi-contact system, which comprises a compressor, an air heat exchanger, an energy storage heat exchange water tank, a clean filter, a sanitary water heater, a heat recovery device, a gas-liquid separator, a split chilled water pump and terminal equipment. The water pump split type multi-contact system can comprehensively treat and adjust indoor air pollution and air temperature and humidity. The system realizes compatible multi-contact, intelligent control, one machine with multiple uses and investment saving of various cold and heat terminal equipment. The compressor is directly connected with the energy storage heat exchange water tank for heat exchange, and operation is not affected by cold (heat) load, so that the highest energy efficiency ratio is achieved. The split chilled water pump independently operates, is flexibly started and stopped, and reduces power consumption. The chilled water pipe network system pressure is low, low-pressure resistant pipe materials can be used, and the pipe system cost is greatly reduced. The chilled water pipe network operation pressure is low, and the pipe life is prolonged. The cold energy in the condensate water is recovered, the condensate water pipe network is cancelled, and the problems of condensate water pipe network blockage and water leakage are completely solved.

Description

Technical Field

[0001] This invention relates to the fields of cooling, heating, heat supply and air cleaning and decontamination, and particularly to a multi-split system with separate water pumps. Background Technology

[0002] A central air conditioning system consists of a cold (heat) source and multiple indoor air conditioning systems, which centrally process air to achieve comfort requirements. It uses the principles of liquid vaporization refrigeration and gas compression heating to provide the necessary cooling and heating to offset the heat and cooling load of the indoor environment.

[0003] The existing water-based central air conditioning system uses water as the refrigerant, requiring a centralized installation of a high-power chilled water pump and a connected chilled water piping system. The chilled water pump is connected to multiple terminal devices through the chilled water piping system.

[0004] For water-based central air conditioning systems, regardless of the actual number of terminal devices in operation, the chilled water pumps must always be running, consuming a large amount of electricity. As the chilled water pipeline network that transports chilled water, the thickness of the pipes must meet the high water pressure requirements caused by the sealed connection of each layer of chilled water pipeline network to form an integrated pipeline network. The large pipe wall thickness results in a high cost for the pipeline system.

[0005] Therefore, it is necessary to provide a pump-separated multi-unit system to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a multi-split system with separate water pumps, which solves the problems of high energy consumption, large steel consumption in piping systems, and the need for regular maintenance of water system networks when any terminal device in various central air conditioning systems is in operation.

[0007] To solve the above-mentioned technical problems, the present invention provides a water pump split-type multi-split system, comprising: a compressor, a Freon refrigerant pipe, an electromagnetic four-way valve, an electromagnetic three-way valve, an air heat exchanger, an expansion valve, a filter, an energy storage and heat exchange tank, a clean filter, a sanitary water heater, a heat recovery unit, a gas-liquid separator, as well as a chilled water supply pipe, a chilled water return pipe, a split chilled water pump, an electric regulating valve, an electric ball valve, a water flow sensor, a water pressure sensor, and terminal equipment;

[0008] The separate chilled water pump circulates the chilled water in the energy storage and heat exchange tank separately to each terminal device to achieve cold or hot supply;

[0009] The separate chilled water pump draws the air washing water and condensate from the terminal equipment into the chilled water pipeline network for cold energy recovery and removal of suspended pollutants in the air.

[0010] The clean filter cleans and filters the chilled water, and then automatically removes the dirt through a dedicated pipeline;

[0011] The water flow sensor monitors the water flow of each terminal device in real time and implements intelligent dynamic adjustment of each terminal device through the main controller to achieve dynamic balance. The heat recovery unit recovers and recirculates the waste heat of the terminal devices for heating. The water heat exchanger in the sanitary water heater recovers the waste heat from cooling.

[0012] Compared with related technologies, the water pump split-type multi-unit system provided by the present invention has the following beneficial effects:

[0013] This invention provides a multi-split system with separate water pumps, capable of comprehensively treating and regulating indoor air pollution, temperature, and humidity; enabling multi-split compatibility with various cold and hot terminal devices, intelligent control, multi-functionality, and cost savings; the compressor is directly connected to the energy storage and heat exchange tank for heat exchange, its operation is unaffected by cold (heat) load, achieving the highest energy efficiency ratio; the separate chilled water pumps operate independently, allowing for flexible start-stop and reducing power consumption; the chilled water pipeline system has a lower pressure, allowing the use of lower pressure-resistant pipes, significantly reducing the cost of the pipeline system; the lower operating pressure of the chilled water pipeline system relatively extends the pipeline life, and the pipeline leakage failure rate is extremely low; the cooling capacity of the condensate is recovered, eliminating the need for a condensate pipeline network and completely solving the problems of condensate pipeline blockage and leakage. Attached Figure Description

[0014] Figure 1 Figure 1 This is a schematic diagram of the structure of a prior art fluorinated refrigerant central air conditioning system provided by the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of a prior art water-based central air conditioning system provided by the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the water pump split-type multi-unit system provided by the present invention;

[0017] Figure 4 This is a schematic diagram of the rapid heating structure of the water pump split-type multi-unit system provided by the present invention;

[0018] Figure 5 A schematic diagram of the energy storage and heating structure of the water pump split-type multi-unit system provided by the present invention;

[0019] Figure 6 This is a schematic diagram of the rapid cooling structure of the water pump split-type multi-unit system provided by the present invention;

[0020] Figure 7 A schematic diagram of the energy storage and cooling structure of the water pump split-type multi-unit system provided by the present invention;

[0021] Figure 8 A schematic diagram of the structure for preparing domestic hot water by heat recovery in a water pump-distributed multi-unit system under refrigeration conditions, provided by the present invention.

[0022] Figure 9 A schematic diagram of the structure for preparing a domestic hot water system for a pump-distributed multi-unit system provided by the present invention;

[0023] Figure 10 A schematic diagram of the structure of the water pump-distributed multi-unit system for drying clothes and waste heat recovery provided by the present invention;

[0024] Figure 11 A schematic diagram of the structure for preparing domestic hot water using a pump-distributed multi-unit system with heat recovery provided by the present invention;

[0025] Figure 12 A schematic diagram of the electronic electromagnetic three-way valve structure for a water pump split-type multi-unit system provided by the present invention;

[0026] Figure 13 This is a schematic diagram of the structure of the water pump-distributed multi-unit system energy storage and heat exchange tank and clean filtration device provided by the present invention.

[0027] Figure 14 A schematic diagram of the air handling coil structure of the water pump split-type multi-unit system provided by the present invention;

[0028] Figure 15 A schematic diagram of the mobile air processor structure for a water pump-distributed multi-split system provided by the present invention;

[0029] Figure 16 A schematic diagram of the structure of the vacuum dryer with a separate water pump multi-unit system provided by the present invention;

[0030] Figure 17 This is a schematic diagram of the second embodiment of the water pump split-type multi-unit system provided by the present invention;

[0031] Figure 18 for Figure 17 The diagram shows the structure of the energy storage hot water tank and the clean filtration device.

[0032] Figure 19 for Figure 17 The diagram shows the structure of the air handling coil.

[0033] Figure 20 This is a schematic diagram of the third embodiment of the pump-distributed multi-unit system provided by the present invention;

[0034] Figure 21 for Figure 20 A cross-sectional view illustrating the overall structure;

[0035] Figure 22 for Figure 21 Enlarged view of section A in the middle;

[0036] Figure 23 for Figure 21 Enlarged view of section B;

[0037] Figure 24 for Figure 21 Top view of the central support. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] First Embodiment

[0040] Please refer to the following: Figures 3 to 16 The water pump-separated multi-split system includes: compressor 1, Freon refrigerant pipe 16, electromagnetic four-way valve 2, electromagnetic three-way valve, air heat exchanger 4, expansion valve 5, filter 6, energy storage and hot water tank 12, clean filter 27, sanitary water heater 10, heat recovery unit, gas-liquid separator 15, chilled water supply pipe 17, chilled water return pipe 18, separate chilled water pump 224, electric regulating valve 226, electric ball valve, water flow sensor 222, water pressure sensor 230, and terminal equipment.

[0041] The separate chilled water pump 224 circulates the chilled water in the energy storage and heat exchange tank 12 separately to each terminal device to achieve cold or hot supply;

[0042] The separate chilled water pump 224 draws the air washing water and condensate from the terminal equipment into the chilled water pipeline network to recover cold energy and remove suspended pollutants in the air.

[0043] The clean filter 27 cleans and filters the chilled water, and then automatically removes the dirt through a dedicated pipe.

[0044] The water flow sensor 222 monitors the water flow of each terminal device in real time and implements intelligent dynamic adjustment of each terminal device through the main controller to achieve dynamic balance. The heat recovery device recovers and recirculates the waste heat of the terminal device for heating. The internal water heat exchanger of the sanitary water heater 10 recovers the waste heat of the cooling system.

[0045] The electromagnetic three-way valve is connected to a first refrigerant output pipe 305 and a second refrigerant output pipe 306. The electromagnetic three-way valve realizes the switching of refrigerant flow direction between the first refrigerant output pipe 305 and the second refrigerant output pipe 306.

[0046] The chilled water return pipe 18 is provided with a water supply pipe interface, and the chilled water return pipe 18 is connected to a water supply pipe through the water supply pipe interface. An electric ball valve is installed on the water supply pipe.

[0047] Each of the aforementioned terminal devices is equipped with a separate chilled water pump 224, an electric regulating valve 226, a check valve, and a water flow sensor 222;

[0048] The terminal equipment includes an air handling terminal equipment, and the water pump split multi-unit system also includes a water collection pan. Each air handling terminal equipment is also equipped with an air washing and decontamination device, a water pressure sensor 230, and an electric ball valve. The water inlet of the electric ball valve is located at the bottom of the water collection pan, and the water outlet of the electric ball valve is connected to the suction end of the split chilled water pump 224 through a three-way pipe.

[0049] The energy storage and heat exchange tank 12 is an open water tank. The energy storage and heat exchange tank 12 is divided into upper and lower heat exchange zones by a partition. Each heat exchange zone is equipped with a fluorinated heat exchanger. The partition has water passage holes. The energy storage and heat exchange tank 12 is equipped with a water level sensor and a temperature sensor.

[0050] The energy storage and hot water exchange tank 12 is provided with a chilled water supply pipe interface, a first chilled water return pipe interface, and a second chilled water return pipe interface. The chilled water supply pipe interface is located in the middle of the lower section of the energy storage and hot water exchange tank 12. The first chilled water return pipe interface is located at the bottom of the lower section of the energy storage and hot water exchange tank 12 and is located on the opposite side of the chilled water supply pipe interface. The second chilled water return pipe interface is located at the top of the upper section of the energy storage and hot water exchange tank 12 and is located on the same side as the chilled water supply pipe interface.

[0051] Both the first chilled water return pipe interface and the second chilled water return pipe interface are equipped with electric ball valves;

[0052] Among them, terminal equipment includes air handling terminal equipment 22, floor heating 23, radiator 24, clothes dryer 25 and warm air blower 26, etc.

[0053] The electromagnetic three-way valve includes a first electromagnetic three-way valve 3, a second electromagnetic three-way valve 8, a third electromagnetic three-way valve 11, a fourth electromagnetic three-way valve 13, and a fifth electromagnetic three-way valve 14.

[0054] The electric ball valves include a first electric ball valve 21, a second electric ball valve 122, a third electric ball valve 123, a fourth electric ball valve 225, and a fifth electric ball valve 272.

[0055] The operating process of the rapid heating refrigerant system for winter air conditioning is as follows: First, after the system is turned on, the compressor 1 outputs high-temperature and high-pressure refrigerant, which passes through the electromagnetic four-way valve 2, the fifth electromagnetic three-way valve 14, and the fourth electromagnetic three-way valve 13 to the fourth water heat exchanger 121. The refrigerant releases heat to the water in the small space in the lower area of ​​the energy storage water tank 12 for rapid heating. Then, it passes through the filter 6 and the expansion valve 5 to cool down and reduce pressure. When it passes through the air heat exchanger 4, it absorbs heat from the outdoor air and returns to the compressor 1 through the electromagnetic four-way valve 2, and the cycle repeats.

[0056] Secondly, after the system is turned on, the water system operation process is as follows: the water level sensor in the energy storage and heat exchange tank 12 detects the water level in the energy storage and heat exchange tank 12. Based on the water level signal, the main controller controls the first electric ball valve 21 on the water supply pipe to supply water as needed. At the same time, the temperature sensor in the energy storage and heat exchange tank 12 sends a signal, the third electric ball valve 123 on the chilled water return pipe closes, and the second electric ball valve 122 opens. Then, the distributed chilled water pumps 224 are turned on simultaneously. The chilled water in the lower zone of the energy storage and heat exchange tank 12 circulates through the chilled water supply pipe 17 to the air handling terminal equipment 22 or the underfloor heating 23 and radiators 24, releasing heat into the indoor space. Then, the chilled water returns through the chilled water return pipe 18 and passes through the clean filter. After processing, the water is returned to the lower zone of the energy storage and hot water exchange tank 12 for reheating, and the cycle repeats. During system operation, the air washing and decontamination device 220 configured in the air handling coil generates washing wastewater which is collected and stored in the water collection pan. When the water reaches the set drainage level, the main controller controls the electric regulating valve 226 to move to the preset valve opening according to the water level sensor signal in the water collection pan, so that the pipeline in front of the split chilled water pump 224 reaches the set negative pressure value, and then opens the fourth electric ball valve 225. The split chilled water pump 224 sucks the water in the water collection pan into the chilled water supply pipe 17, and together with the chilled water, it is returned to the energy storage and hot water exchange tank 12 after being treated by the clean filter 27 through the chilled water return pipe 18.

[0057] Fluorine system electrical control: During rapid heating operation in winter, solenoid four-way valve 2 is energized and operates, solenoid three-way valve 14 is energized and operates, solenoid three-way valve 13 is energized and operates, solenoid three-way valve 11 is not energized and does not operate, solenoid three-way valve 8 is not energized and does not operate, solenoid three-way valve 3 is not energized and does not operate.

[0058] The working principle of the chilled water pump-distributed central air handling system provided in this embodiment is as follows:

[0059] Please see Figure 5After the system has been running in rapid heating mode for a period of time, the water temperature sensor in the lower zone of the energy storage hot water tank 12 sends a signal that the water temperature has reached the set temperature. The fourth water heat exchanger 121 is closed, the energy storage zone water heat exchanger is opened, the second electric ball valve 122 of the chilled water return pipe is closed, and the third electric ball valve 123 is opened. The water medium in the energy storage hot water tank 12 runs in series in the upper and lower zones. When the water temperature in the upper and lower zones of the energy storage hot water tank 12 reaches the set temperature, the two sets of water temperature sensors send signals. The main controller controls the other distributed chilled water pumps 224 to stop working, leaving only the distributed chilled water pumps 224 of the terminal equipment that only need to be turned on to continue running. Their respective temperature regulators are automatically controlled according to the indoor temperature, and the system enters the energy storage heating mode and runs normally.

[0060] During system operation, when the room temperature reaches the set value, the corresponding terminal device 22 stops working, and the corresponding matching split chilled water pump 224 stops running, thereby enabling the split chilled water pump to work as needed and reducing power consumption.

[0061] Fluorine system electrical control: During winter energy storage and heating operation, the solenoid four-way valve 2 is energized and operates, the fifth solenoid three-way valve 14 is energized and operates, the fourth solenoid three-way valve 13 is not energized and does not operate, the third solenoid three-way valve 11 is not energized and does not operate, the second solenoid three-way valve 8 is not energized and does not operate, and the first solenoid three-way valve 3 is not energized and does not operate.

[0062] Please see Figure 6 The operating process of the rapid cooling refrigerant system for air conditioning in summer is as follows: First, after the system is turned on, the compressor 1 outputs high-temperature and high-pressure refrigerant, which releases heat into the outdoor air through the electromagnetic four-way valve 2, the first electromagnetic three-way valve 3, and the air heat exchanger 4. After being cooled and depressurized by the expansion valve 5, it passes through the filter 6 to the fourth water heat exchanger 121 in the energy storage hot water tank 12, which rapidly cools the water medium in the lower small space. Then, it returns to the compressor 1 through the fourth electromagnetic three-way valve 13, the fifth electromagnetic three-way valve 14, and the electromagnetic four-way valve 2, and the cycle repeats.

[0063] Secondly, after the system is powered on, the water system operates as follows: the water level sensor in the energy storage and heat exchange tank 12 detects the water level in the energy storage and heat exchange tank 12. Based on the water level signal, the main controller controls the first electric ball valve 21 on the water supply pipe to supply water as needed. At the same time, the temperature sensor in the energy storage and heat exchange tank 12 sends a signal, the third electric ball valve 123 on the chilled water return pipe closes, and the second electric ball valve 122 opens. Then, the distributed chilled water pumps 224 start simultaneously. The chilled water in the lower zone of the energy storage and heat exchange tank 12 circulates through the chilled water supply pipe 17 to the air handling terminal equipment 22, releasing the cooling capacity into the indoor space. Then, the chilled water passes through the clean filter via the chilled water return pipe 18. After being processed by the air handling unit 27, the water is returned to the lower zone of the energy storage and hot water exchange tank 12 for reheating, and the cycle repeats. During system operation, when the air washing wastewater and condensate generated by the air handling terminal unit 22 reach the set water level in the water collection pan, the main controller controls the electric regulating valve 226 to move to the preset valve opening according to the water level sensor signal in the water collection pan, controls the pipeline before the pump of the split chilled water pump 224 to reach the set negative pressure value, and then opens the fourth electric ball valve 225. The split chilled water pump 224 draws the water in the water collection pan into the chilled water supply pipe 17, and together with the chilled water, it is returned to the energy storage and hot water exchange tank 12 after being treated by the clean filter 27 through the chilled water return pipe 18.

[0064] Fluorine system electrical control: During rapid cooling operation in summer, solenoid four-way valve 2 is not energized and does not operate, first solenoid three-way valve 3 is not energized and does not operate, fourth solenoid three-way valve 13 is energized and operates, fifth solenoid three-way valve 14 is energized and operates, third solenoid three-way valve 11 is not energized and does not operate, and second solenoid three-way valve 8 is not energized and does not operate.

[0065] Please see Figure 7 After the system has been running in rapid cooling mode for a period of time, based on the signal from the water temperature sensor in the lower zone of the energy storage hot water tank 12 that the water temperature has reached the set temperature, the fourth water heat exchanger 121 is closed, the energy storage zone water heat exchanger is opened, the second electric ball valve 122 of the chilled water return pipe is closed, and the third electric ball valve 123 is opened. The chilled water in the energy storage hot water tank 12 undergoes a series circulation operation between the upper and lower zones. When the water temperature in both the upper and lower zones of the energy storage hot water tank 12 reaches the set temperature, after the two sets of water temperature sensors send signals, the other distributed chilled water pumps 224 stop working, leaving only the distributed chilled water pumps 224 of the terminal equipment that only need to be turned on to continue working. The temperature regulator configured thereon is automatically controlled according to the indoor temperature, and the system enters the energy storage cooling mode and runs normally.

[0066] During system operation, when the room temperature reaches the set value, the terminal device 22 stops working, and the corresponding distributed chilled water pump 224 stops running, thereby enabling the distributed chilled water pump to work as needed and reducing power consumption.

[0067] Fluorine system electrical control: During summer energy storage and cooling operation, the solenoid four-way valve 2 is not energized and does not operate, the first solenoid three-way valve 3 is not energized and does not operate, the second solenoid three-way valve 8 is not energized and does not operate, the third solenoid three-way valve 11 is not energized and does not operate, the fourth solenoid three-way valve 13 is not energized and does not operate, and the fifth solenoid three-way valve 14 is energized and operates.

[0068] Please see Figure 8 The operation process for waste heat recovery to produce domestic hot water under refrigeration conditions is as follows: During summer energy storage refrigeration operation, the first electromagnetic three-way valve 3 and the third electromagnetic three-way valve 11 are switched to the energized state. The compressor 1 outputs high-temperature and high-pressure refrigerant, which releases heat into the water tank of the domestic water heater 10 through the first water heat exchanger 100, and heat recovery is used to produce domestic hot water. When the water temperature in the water tank of the domestic water heater 10 reaches the set value, the internal temperature sensor sends a signal, and the water pump split multi-split system automatically switches to energy storage refrigeration mode.

[0069] Electrical control of the fluorine system: During summer refrigeration operation, when waste heat is recovered to produce domestic hot water, solenoid four-way valve 2 is not energized and does not operate; first solenoid three-way valve 3 is energized and operates; third solenoid three-way valve 11 is energized and operates; fourth solenoid three-way valve 13 is not energized and does not operate; fifth solenoid three-way valve 14 is energized and operates; second solenoid three-way valve 8 is not energized and does not operate.

[0070] Please see Figure 9 The operation process for producing domestic hot water separately is basically the same as that for the rapid heating mode. In the rapid heating mode, the fifth electromagnetic three-way valve 14 and the fourth electromagnetic three-way valve 13 are switched to a non-energized and non-operating state. The refrigerant then passes through the second water heat exchanger 101 inside the domestic water heater 10 to release heat into the water tank of the water heater 10 to produce domestic hot water. When the water temperature in the water tank of the domestic water heater 10 reaches the set value, the internal temperature sensor sends a signal, and the water pump split multi-connection system automatically stops operating.

[0071] Electrical control of the fluorine system: When producing domestic hot water alone, the solenoid four-way valve 2 is energized and operates, the fifth solenoid three-way valve 14 is not energized and does not operate, the fourth solenoid three-way valve 13 is not energized and does not operate, the third solenoid three-way valve 11 is not energized and does not operate, the second solenoid three-way valve 8 is not energized and does not operate, and the first solenoid three-way valve 3 is not energized and does not operate.

[0072] Please see Figure 10 The operation process of the dryer and other heat recovery modes is basically the same as that of the rapid heating mode. On the basis of the rapid heating mode, the first electromagnetic three-way valve 3 is switched to the energized state, and the fluorinated medium is transferred to the first heat recovery unit 7. While the chilled water pump 224 of the dryer 25 is turned on to heat and blow out 50 degrees Celsius hot air to dry the clothes, the heat released by the dryer is recycled and reused.

[0073] Fluorine system electrical control: When using a dryer and recovering residual heat, the solenoid four-way valve 2 is energized and actuates, the fifth solenoid three-way valve 14 is energized and actuates, the fourth solenoid three-way valve 13 is energized and actuates, the third solenoid three-way valve 11 is not energized and does not actuate, the second solenoid three-way valve 8 is not energized and does not actuate, and the first solenoid three-way valve 3 is energized and actuates.

[0074] Please see Figure 11 The process of producing domestic hot water through heat recovery is basically the same as the operation mode of producing domestic hot water separately. Based on the operation mode of producing domestic hot water separately, the first electromagnetic three-way valve 3 and the second electromagnetic three-way valve 8 are switched to the energized state. The refrigerant then absorbs excess heat from other places through the second heat recovery unit 9 and releases the heat into the water tank of the water heater 10 to produce domestic hot water. When the water temperature in the water tank of the domestic water heater 10 reaches the set value, the internal temperature sensor sends a signal, and the main controller controls the water pump split multi-connection system to stop operating.

[0075] Fluorine system electrical control: When heat recovery is used to produce domestic hot water, the solenoid four-way valve 2 is energized and operates, the fifth solenoid three-way valve 14 is not energized and does not operate, the fourth solenoid three-way valve 13 is not energized and does not operate, the third solenoid three-way valve 11 is not energized and does not operate, the second solenoid three-way valve 8 is energized and operates, and the first solenoid three-way valve is energized and operates.

[0076] Please see Figure 12 When the electromagnetic coil 300 is de-energized, the pilot valve 301 controls the high-pressure refrigerant to enter the right piston chamber through the first capillary tube 302 and the fourth capillary tube 308. At the same time, the refrigerant in the left piston chamber is connected to the third capillary tube 307 through the second capillary tube 304 and then connected to the suction end of the compressor 1. The refrigerant is discharged by the compressor 1, which creates a pressure difference between the two ends of the piston. The piston and the main slide valve move to the left, so that the refrigerant input pipe 303 is connected to the second refrigerant output pipe 306, while the first refrigerant output pipe 305 is in a closed state.

[0077] When the electromagnetic coil 300 is energized, the pilot valve 301 controls the high-pressure refrigerant to enter the left piston chamber through the first capillary tube 302 and the second capillary tube 304. At the same time, the refrigerant in the right piston chamber is connected to the third capillary tube 307 through the fourth capillary tube 308 and enters the suction end of the compressor 1. The refrigerant is discharged by the compressor 1, which creates a pressure difference between the two ends of the piston. The piston and the main slide valve move to the right, so that the refrigerant inlet pipe 303 is connected to the first refrigerant outlet pipe 305, while the second refrigerant outlet pipe 306 is in a closed state, thereby realizing the conversion of the refrigerant flow direction between the first refrigerant outlet pipe 305 and the second refrigerant outlet pipe 306.

[0078] Please see Figure 13The energy storage and heat exchange tank 12 is an open water tank, which is divided into upper and lower zones by a partition with a water passage hole at the far end. The lower zone is a rapid cooling (heating) zone and the upper zone is an energy storage zone. The rapid cooling (heating) zone is equipped with a fourth water heat exchanger 121, and the energy storage zone is equipped with a water heat exchanger.

[0079] When the system is first started, the water pump split multi-split system enters the rapid cooling (heating) stage. The second electric ball valve 122 of the chilled water return pipe is opened and the third electric ball valve 123 is closed. The water medium only circulates for cooling (heating) in the lower zone of the energy storage and heat exchange tank 12.

[0080] After the system has been running for a period of time, as the terminal load gradually decreases, the chilled water temperature and return water temperature in the lower zone of the energy storage and hot water exchange tank 12 reach the set value. The temperature sensor in the energy storage and hot water exchange tank 12 sends a signal, the second electric ball valve 122 of the chilled water return pipe closes, the third electric ball valve 123 opens, and the water medium in the energy storage and hot water exchange tank 12 undergoes a series circulation operation between the upper and lower zones. The water pump split multi-unit system enters the energy storage cooling (heating) mode and operates normally.

[0081] The chilled water return pipe 18 of the energy storage and heat exchange tank 12 is equipped with a clean filter 27, a first gate valve 270, a second gate valve 271, and a fifth electric ball valve 272. The clean filter 27 performs high-level cleaning treatment on chilled water, air washing wastewater, and condensate. The relevant parameters are fed back to the main controller for processing. When the clean filter 27 needs backwashing, the main controller controls the fifth electric ball valve 272 to open and discharge backwash wastewater.

[0082] Please see Figure 14 The air handling coil is equipped with an air scrubbing and decontamination device 220, a check valve 221, a water flow sensor 222, a first shut-off valve 223, a separate chilled water pump 224, a fourth electric ball valve 225, an electric regulating valve 226, a second shut-off valve 227, and a water pressure sensor 230. The outlet of the chilled water pump 224 is connected to the inlet of the air handling coil. The inlet of the separate chilled water pump 224 is connected to the electric regulating valve 226, the second shut-off valve 227, and then to the chilled water supply pipe 17. The fourth electric ball valve 225... The inlet is connected to the drain outlet at the bottom of the water collection pan, and the outlet is connected to the inlet of the corresponding split chilled water pump 224 via a tee. The outlet of the air handling coil is connected in sequence to the check valve 221, the water flow sensor 222, the water pressure sensor 230, the first shut-off valve 223, and then to the chilled water return pipe 18. Each split chilled water pump supplies chilled water from the energy storage and heat exchange tank 12 to each air handling coil separately. The air washing and decontamination device 220 uses clean chilled water to wash and adsorb suspended pollutants in the indoor air.

[0083] During system operation, the water flow sensor 222 monitors the water flow of each air handling coil in real time and transmits it to the control host. The control host compares the real-time water flow and rated water flow of each device and then intelligently and dynamically adjusts the opening of the electric regulating valve 226 of the air handling coil to achieve dynamic balance of water flow of each terminal device.

[0084] A water collection pan is also installed at the bottom of the air handling coil. The water collection pan is equipped with air washing wastewater and condensate water level sensors. When the washing wastewater and condensate water in the water collection pan reach the set water level, the main controller controls the electric regulating valve 226 to move to the preset opening degree according to the water level sensor signal in the water collection pan. After the pipeline in front of the split chilled water pump 224 reaches the set negative pressure value, the main controller opens the fourth electric ball valve 225 according to the negative pressure signal of the water pressure sensor 230. The split chilled water pump 224 draws the water in the water collection pan into the chilled water supply pipe 17, realizing the discharge of water and the recycling of condensate cooling capacity. All return water flows back to the energy storage and heat exchange tank 12 after high-level filtration treatment through the clean filter 27.

[0085] During system operation, when the room temperature reaches the set value, the air handling coil stops working, and the corresponding split chilled water pump 224 stops running, thereby enabling the split chilled water pump 224 to work as needed, reducing power consumption.

[0086] Please see Figure 15 The mobile air handler of the pump-distributed multi-split system is an air handling terminal device. It is connected to the pre-installed chilled water pipes in the room by quick connectors, which can make it easy to share the same mobile air handler in places where cooling and heating are not required at the same time. Its structure is similar to that of the air handling coil of the pump-distributed multi-split system, and its operation mode is the same as that of the air handling coil of the pump-distributed multi-split system.

[0087] Please see Figure 16 The dryer 25 is equipped with a check valve 221, a water flow sensor 222, a first shut-off valve 223, a split chilled water pump 224, an electric regulating valve 226, a second shut-off valve 227, and a vacuum pump 229. The outlet of the chilled water pump 224 is connected to the inlet of the radiator inside the dryer 25. The inlet of the split chilled water pump 224 is connected to the electric regulating valve 226, the second shut-off valve 227, and then to the chilled water supply pipe 17. The outlet of the radiator inside the dryer 25 is connected to the check valve 221, the water flow sensor 222, the first shut-off valve 223, and then to the chilled water return pipe 18. The split chilled water pump 224 circulates the hot water inside the energy storage hot water tank 12 to the dryer 25.

[0088] During system operation, the water flow sensor 222 monitors the water flow of the dryer 25 in real time and transmits it to the main controller. The main controller compares the real-time water flow and rated water flow of each device and then implements intelligent dynamic adjustment of the opening of the electric regulating valve 226 of the dryer 25 to achieve dynamic balance of water flow of each device in the whole system.

[0089] During system operation, when the drying chamber temperature reaches the set value, the split chilled water pump 224 stops operating to supply heat; when the drying chamber temperature is lower than the set value, the split chilled water pump 224 restarts to supply hot water, and the cycle repeats.

[0090] During system operation, the main controller controls the vacuum pump in the drying chamber based on the signal from the vacuum pressure sensor. When the vacuum pressure is greater than the set value, the vacuum pump 229 starts and stops running when the vacuum pressure reaches the set value, repeating the cycle.

[0091] Second Embodiment

[0092] Please refer to the following: Figure 17 , Figure 18 and Figure 19 Based on the water pump-separated multi-split system provided in the first embodiment of this application, the second embodiment of this application proposes another chilled water pump-separated central air handling system. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0093] The difference of the chilled water pump-distributed central air handling system provided in the second embodiment of this application is that the chilled water pump-distributed central air handling system is suitable for office buildings, hotels, hospitals and similar buildings. Its unique characteristics are that these places have a large number of people and a variety of people with heavy air pollution, and the system must run for more than 8 hours after startup. The types of terminal equipment are also limited. This type of central air handling system is the most widely used, most energy-intensive and most representative system on the market.

[0094] The chilled water pump-separated central air handling system also includes: a main unit, a third water heat exchanger 120, a parallel pipe 19, and a chilled water return pipe 18.

[0095] The main unit is connected to the third water heat exchanger 120 in the energy storage and hot water exchange tank 12 through the Freon refrigerant pipe 16. The energy storage and hot water exchange tank 12 connects each terminal device in parallel through the chilled water supply pipe 17, the chilled water return pipe 18, the parallel pipe 19 and the clean filter 27, which together constitute a chilled water pump-distributed central air handling system.

[0096] The main unit is connected to several energy storage and hot water exchange tanks 12 via Freon refrigerant pipes 16 to exchange heat with the third water heat exchanger 120. The energy storage and hot water exchange tanks 12 are then connected in parallel to each terminal device 22 via chilled water supply pipe 17, chilled water return pipe 18, parallel pipe 19, and clean filter 27, which together form a chilled water pump-distributed central air handling system.

[0097] The main units are various types of heat pump units;

[0098] A chilled water pump-distributed central air handling system, depending on the system size, may have one or more energy storage and hot water exchange tanks 12 installed on each floor of the building.

[0099] The energy storage and heat exchange tank 12 is equipped with a heat exchange coil, which is connected to a chilled water supply pipe 17 and a chilled water circulation pipe 19. A vent (overflow) pipe 124 is installed at the top.

[0100] The energy storage hot water tank 12 is also equipped with a water level sensor and a temperature sensor. The main controller controls the system water replenishment and the start and stop of the host according to the water level signal and temperature signal respectively.

[0101] The same-path pipe 19 is connected to the water supply pipe via a tee. The water supply pipe is equipped with a first electric ball valve 21, which replenishes water according to the water level sensor signal in the energy storage and heat exchange tank 12.

[0102] Each terminal device 22 is equipped with a check valve 221 and a separate chilled water pump 224. The separate chilled water pump 224 draws chilled water from the energy storage and heat exchange tank 12 through the chilled water supply pipe 17 and circulates it to each terminal device for cooling (heating).

[0103] Each terminal device 22 is also equipped with an air washing and decontamination device 220, a water collection pump 228, a fourth electric ball valve 225, and a water level sensor for the water collection pan. The drain outlet of the water collection pan of the terminal device 22 is connected in sequence to the fourth electric ball valve 225 and the separate water collection pump 228, and then connected to the suction end of the separate chilled water pump 224 through a three-way pipe.

[0104] The working principle of the chilled water pump-distributed central air handling system provided in this embodiment is as follows:

[0105] First, after the system is turned on, the main unit is connected to the heat exchange coil in each energy storage hot water tank 12 through the refrigerant pipe 16 for heat exchange. The main unit operates according to the temperature sensor signal in the energy storage hot water tank 12 and is adjusted or started and stopped by the main controller.

[0106] Secondly, the water level sensor in the energy storage hot water tank 12 detects the water level in the tank, and the first electric ball valve 21 of the water supply pipe replenishes water as needed based on the water level signal;

[0107] At the same time, all 224 separate chilled water pumps are turned on, so that the water medium circulates in the energy storage and heat exchange tank and chilled water pipeline network to cool or heat the area where the terminal equipment is turned on.

[0108] During system operation, when the room temperature reaches the set value or when people leave, the terminal device 22 stops working, and the corresponding distributed chilled water pump 224 stops running, thereby enabling the distributed chilled water pump 224 to work as needed, reducing power consumption.

[0109] Furthermore, during system operation, the air washing and decontamination device 220 of the terminal device 22 uses chilled water to perform circulating washing and decontamination treatment on the circulating air. When the water in the sump reaches the set water level and needs to be drained, the main controller, based on the water level sensor signal in the sump, opens the sump pump 228 and the fourth electric ball valve 225 to pump the water in the sump into the chilled water supply pipe 17, draining the water and recovering the cooling capacity in the condensate. When the water level drops to the set position, the main controller, based on the water level sensor signal, closes the sump pump 228 and the fourth electric ball valve 225.

[0110] Figure 18 The diagram shows the structure of the energy storage and heat exchange tank and clean filter in a chilled water pump-separated central air handling system.

[0111] The energy storage and heat exchange tank 12 is an open water tank with a third water heat exchanger 120 inside. The cold (heat) generated by the main unit is used to cool or heat the circulating chilled water through the third water heat exchanger 120.

[0112] The energy storage and hot water exchange tank 12 is also equipped with a temperature sensor. When the circulating chilled water reaches the set shutdown temperature, the temperature sensor sends a signal, and the main controller controls the main unit to shut down. When the circulating chilled water reaches the set startup temperature, the temperature sensor sends a signal, and the main controller controls the main unit to start up.

[0113] The energy storage hot water tank 12 is also equipped with a water level sensor. After the system is turned on, the water level sensor detects the water level of the energy storage hot water tank 12. The main controller controls the first electric ball valve 21 on the water supply pipe to supply water as needed based on the water level signal.

[0114] The chilled water return pipe 18 of the energy storage and heat exchange tank 12 is equipped with a clean filter 27, a first gate valve 270, a second gate valve 271, and a fifth electric ball valve 272. The clean filter 27 performs high-level clean filtration treatment on chilled water, air washing wastewater, and condensate. The relevant parameters are fed back to the main controller for processing. When the clean filter 27 needs backwashing, the main controller controls the fifth electric ball valve 272 to open and discharge backwash wastewater.

[0115] Figure 19The diagram shows the air handling coil structure of a chilled water pump-separated central air handling system.

[0116] The air handling coil is equipped with an air scrubbing and decontamination device 220, a check valve 221, a first shut-off valve 223, a separate chilled water pump 224, a fourth electric ball valve 225, a second shut-off valve 227, and a separate water collection pump 228. The outlet of the chilled water pump 224 is connected to the inlet of the air handling coil. The inlet of the separate chilled water pump 224 is connected to the second shut-off valve 227 and then to the chilled water supply pipe 17. The inlet of the fourth electric ball valve 225 is connected to the drain outlet at the bottom of the water collection pan. The outlet is connected to the separate water pump 228, and then connected to the inlet of the separate chilled water pump 224 through a tee. The outlet of the air handling coil is connected to the check valve 221, the first shut-off valve 223 and then to the chilled water return pipe 18. Each separate chilled water pump 224 circulates the chilled water inside the energy storage and heat exchange tank 12 to each air handling coil. The air washing and decontamination device 220 uses clean chilled water to wash and decontaminate the indoor air and remove suspended pollutants from the air.

[0117] A water collection pan is also installed at the bottom of the air handling coil. The water collection pan is equipped with air washing wastewater and condensate water level sensors. When the washing wastewater and condensate water reach the set water level in the water collection pan, the main controller opens the separate water collection pump 228 and the fourth electric ball valve 225 according to the water level sensor signal in the water collection pan, pumping the water in the water collection pan into the chilled water supply pipe 17, realizing the discharge of water and the recycling of condensate cooling capacity. All return water flows back to the energy storage and heat exchange tank 12 after high-level filtration treatment by the clean filter 27.

[0118] During system operation, when the room temperature reaches the set value, the air handling coil stops working, and the corresponding split chilled water pump 224 stops running, thereby enabling the split chilled water pump 224 to work as needed, reducing power consumption.

[0119] Compared with existing related technologies, the chilled water pump-distributed central air handling system provided by the present invention has the following beneficial effects:

[0120] The present invention provides a chilled water pump-type central air handling system, wherein the air washing and decontamination device uses chilled water to comprehensively treat the temperature, humidity and suspended pollutants of the air, ensuring clean and hygienic indoor air and suitable temperature and humidity;

[0121] The main unit is directly connected to the energy storage and hot water exchange tank for heat exchange, and is not affected by changes in the number of terminal equipment in operation. It achieves the highest energy efficiency ratio and realizes energy saving and emission reduction.

[0122] Various terminal devices and their separate chilled water pumps operate independently, allowing for flexible start-up and shutdown, resulting in significant energy savings.

[0123] Chilled water piping systems operate at lower pressures, allowing the use of pipes with lower pressure resistance, which significantly reduces the cost of the piping system, extends the service life of the pipes, and results in an extremely low rate of pipe network leakage.

[0124] By utilizing the chilled water pipe network to recover the cooling capacity of the condensate, and eliminating the need for the condensate pipe network itself, the problems of condensate pipe network blockage and leakage are completely solved.

[0125] The chilled water pipeline network is equipped with a water supply pipe interface, which enables the tap water pipe to be connected to the nearest water supply, providing great convenience for the project construction.

[0126] Third Embodiment

[0127] Please refer to the following: Figures 20 to 24 Based on the water pump-separated multi-split system provided in the first embodiment of this application, the third embodiment of this application proposes another chilled water pump-separated central air handling system. The third embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the separate implementation of the first embodiment.

[0128] The difference in the chilled water pump-separated central air handling system provided in the second embodiment of this application is that the clean filter 27 includes:

[0129] The outer casing 1a has a water inlet pipe 102a fixedly installed at one end;

[0130] Filter element 3a, the filter element 3a being suspended inside the outer casing 1a;

[0131] The sealing element 6a includes a bracket 61a and a second sealing block 62a. The second sealing block 62a seals one end of the filter element 3a and is detachably connected to the filter element 3a. One end of the bracket 61a is connected to the inner wall of the water inlet pipe 102a, and the other end of the bracket 61a is connected to the second sealing block 62a.

[0132] An adjusting pipe 2a is located at the other end of the outer casing 1a. The adjusting pipe 2a includes a first pipe body 201a, a second pipe body 202a, a first sealing block 203a, a water outlet pipe 204a, and a connecting rod 205a. One end of the first pipe body 201a is inserted into the outer casing 1a. The second pipe body 202a is fixed to the other end of the first pipe body 201a. One end of the water outlet pipe 204a is connected to the filter element 3a, and the other end of the water outlet pipe 204a is fitted into the first pipe body 201a. The diameter of the first pipe body 201a is smaller than the diameter of the second pipe body 202a. The first sealing block 203a is suspended inside the second pipe body 202a by the connecting rod 205a. A drain device 4a is also provided on the outer casing 1a.

[0133] In filtration mode, the liquid to be filtered enters the outer casing 1a through the inlet pipe 102a, is filtered by the filter element 3a, and is discharged through the outlet pipe 204a. When switching to cleaning mode, the position of the first sealing block 203a and the second sealing block 62a is adjusted by moving the driving adjustment pipe 2a, thereby sealing the outlet pipe 204a and connecting one end of the filter element 3a to the inlet pipe 102a. Cleaning water then enters the interior of the filter element 3a through the inlet pipe 102a and flows out from the inside of the filter element 3a to the outside, achieving backwashing and cleaning of the filter element 3a. The filtration or cleaning function of the filter element 3a can be achieved by driving the position of the adjustment pipe 2a, without the need to disassemble the filter element 3a for cleaning. The cleaning operation is simple and convenient.

[0134] Please refer to it again. Figure 21 and Figure 22 In a preferred embodiment, the second pipe body 202a is connected to the connecting pipe 206a, and the diameter of the connecting pipe 206a is the same as the diameter of the first pipe body 201a. A U-shaped pipe is formed between the first pipe body 201a, the second pipe body 202a, and the connecting pipe 206a. The diameter of the first sealing block 203a is the same as the inner diameter of the first pipe body 201a, and a sealing ring is provided around the periphery of the first sealing block 203a to ensure sealing.

[0135] Among them, connecting pipe 206a is connected to the external water supply pipe, and the external water supply pipe is connected to the inlet pipe of the energy storage hot water exchange tank.

[0136] In this embodiment, the clean filter 27 further includes a protective sleeve 101a, which is fixed to the other end of the outer shell 1a and is arranged around the first tube body 201a.

[0137] In one embodiment, a sealing sleeve 1011a is provided between the protective sleeve 101a and the adjusting pipe 2a to ensure the sealing of the connection between the protective sleeve 101a and the first pipe body 201a, while increasing the friction at the connection to enhance the limiting of the adjusting pipe 2a.

[0138] In a preferred embodiment, the protective sleeve 101a is threadedly connected to the first tube body 201a.

[0139] By threading the regulating pipe 2a to the protective sleeve 101a, vertical support can be provided to the regulating pipe 2a and the filter element 3a, thereby improving the stability of the filter during operation.

[0140] Wherein, the length of the threaded connection surface between the protective sleeve 101a and the first tube body 201a is less than the length of the protective sleeve 101a, and the sealing sleeve 1011a is disposed below the threaded connection surface.

[0141] The connecting pipe 206a at the top of the second pipe body 202a in the regulating fitting 2a is connected to the water supply pipe through a rotating connector 5a, so that when the regulating fitting 2a rotates, the water supply pipe does not need to rotate with it.

[0142] The surface of the adjusting pipe fitting 2a is provided with an external thread that matches the internal thread, while the lower surface is not provided with an external thread to maintain a smooth surface, thereby ensuring a tight seal with the sealing sleeve 1011a located on the lower side.

[0143] Please see Figure 3 The inner wall of the first pipe body 201a is provided with a sliding groove 2011a, and the surface of the water outlet pipe 204a is provided with a slider 2041a, which is inserted into the bottom end of the sliding groove 2011a.

[0144] By setting the sliding groove 2011a in conjunction with the slider 2041a, a sliding key fit is formed between the first tube 201a and the water outlet pipe 204a. The slider 2041a and the sliding groove 2011a can support the filter element 3a, so that it is stably suspended inside the outer shell 1a.

[0145] When the first pipe body 201a slides downward relative to the outlet pipe 204a, and the slider 2041a on the outlet pipe 204a slides from the bottom end of the groove 2011a to the top end, the first sealing block 203a is embedded into the interior of the outlet pipe 204a to seal the outlet pipe 204a.

[0146] In other embodiments, please refer again. Figures 1 to 2 The sewage discharge component 4a includes a sewage discharge pipe 41a, a third pipe body 42a, and a valve. The sewage discharge pipe 41a is connected to the bottom of the outer casing 1a, and a valve 7a is provided on the sewage discharge pipe 41a.

[0147] The drain pipe 41a connects the outer shell 1a and the third pipe body 42a; the diameter of the drain pipe 41a is smaller than the diameter of the third pipe body 42a.

[0148] The valve 7a includes a connecting arm 71a and a valve core 72a. The valve core 72a blocks the drain pipe 41a and is detachably connected to the drain pipe 41a. The connecting arm 71a connects the filter element 3a to the valve core 72a.

[0149] By installing a third pipe body 42a on the drain pipe 41a and adjusting the position of the valve core 72a up and down, the opening and closing of the drain pipe 41a can be adjusted. The valve core 72a is connected to the filter element 3a through the connecting arm 71a. During the cleaning process of the filter element 3a, when adjusting the position of the filter element 3a, the valve core 72a can be adjusted to enter the interior of the third pipe body 42a, thereby opening the drain pipe 41a and realizing the function of automatic sewage discharge. After cleaning, when the filter element 3a is adjusted back to its original position, the valve core 72a can be moved out of the third pipe body 42a to seal the drain pipe 41a, realizing the automatic opening and closing of the drain pipe 41a.

[0150] Please see Figure 2 One end of the filter element is provided with a transition tube 31a, and the second sealing block 62a seals one end of the transition tube 31a and is detachably connected to the transition tube 31a.

[0151] The transition pipe 31a is provided with an annular sealing nozzle 311a, which surrounds the second sealing block. At this time, the connecting arm 71a is connected to the transition pipe 3.

[0152] By setting a transition tube 31a and an annular sealing nozzle 311a at its bottom, when the filter element 3a is connected to the water inlet pipe 102a, the annular sealing nozzle 311a can be inserted into the water inlet pipe 102a, thereby making the connection between the filter element 3a and the water inlet pipe 102a more stable, better preventing the cleaning fluid from flowing into the housing 1a, and facilitating the connection between the connecting arm 71a and the filter element 3a.

[0153] The outer diameter of the annular sealing nozzle 311a is the same as the inner diameter of the water inlet pipe 102a; when the transition pipe 31a is connected to the water inlet pipe 102a, the sealing nozzle is inserted into the water inlet pipe 102a accordingly.

[0154] The connecting arm 71a is slidably connected to the transition tube 31a.

[0155] By slidingly connecting the connecting arm 71a and the transition tube 31a, when the filter element 3a is rotating, the connecting arm 71a and the transition tube 31a slide relative to each other and do not need to rotate together, so that the second sealing block 62a can be stably located in the drain pipe 41a.

[0156] In this embodiment, an annular slide rail is provided on the surface of the transition tube 31a, and a slider is provided at one end of the connecting arm 71a, which is slidably connected to the annular slide rail, so that the slider can slide along the annular slide rail when the filter element 3a rotates. The groove of the annular slide rail cross section is convex, and the slider connected to the connecting arm 31 is a matching convex shape.

[0157] Please refer to it again. Figure 7 and Figure 8The filter for the water pump split-type multi-connection system also includes a rotary drive mechanism 8a. The rotary drive mechanism 8a includes a mounting bracket 81a, a motor 82a, a main gear 83a, and a driven gear 84a. The motor 82a is mounted on the housing 1a via the mounting bracket 81a. The main gear 83a is fixed on the drive shaft of the motor 82a. A connecting pipe 206a is provided at the end of the second pipe 202a away from the first pipe 201a. The driven gear 84a is mounted on the connecting pipe 206a and meshes with the main gear 83a.

[0158] By setting up a rotary drive mechanism 8a, the motor 82a, in conjunction with the main gear 83a and the driven gear 84a, drives the adjusting pipe 2a to rotate, thereby adjusting the position of the first sealing block 203a and the second sealing block 62a relative to the filter element 3a. This enables backwashing and cleaning of the filter element 3a, switching of the filtration function, opening and closing of the drain pipe 41a, and driving the filter element 3a to rotate in both directions and the internal cleaning water. This improves the cleanliness of the filter element, eliminates the need for manual adjustment, makes cleaning operations more convenient, and simplifies the equipment structure by eliminating the need for multiple control devices.

[0159] In this example, during the cleaning process, when the motor 82a drives the filter element 3a to rotate clockwise and counterclockwise and interacts with the internal cleaning water to improve the cleaning effect, the filter element 3a will move slightly up and down. During the slight up and down movement of the filter element 3a, the first sealing block 203a is always located inside the water outlet pipe 204a, and the second sealing block 62a is located inside the transition pipe 31a, above the sealing nozzle. Water can enter the interior of the filter element 3a through the transition pipe 31a, and the sealing nozzle is always located in the water inlet pipe 102a, preventing the cleaning water from directly entering the outer shell 1a through the water inlet pipe 102a.

[0160] The drainage speed of the drain pipe 41a is less than the water inlet speed of the inlet pipe 102a, so that water can be stored inside the outer shell 1a during the cleaning process. When the filter element 3a rotates clockwise and counterclockwise, it can interact with the cleaning water to improve the cleaning effect.

[0161] The motor can be set with a timer function to clean the filter element 3a periodically, making cleaning more convenient.

[0162] The thickness of the driven gear 84a is greater than the thickness of the main gear 83a, and the thickness difference is the same as the distance between the top ends of the first tube 201a and the protective sleeve 101a, so that when the adjusting tube 2a moves downward while rotating, the main gear 83a always meshes with the driven gear 84a.

[0163] The working principle of this embodiment is as follows:

[0164] When the filter is in the filtration state, the water to be filtered is input through the inlet pipe 102a, and then flows into the housing 1a through the inlet gap between the transition pipe 31a and the bottom of the housing 1a. After the water flows through the filter element 3a for filtration, it is discharged from the protective sleeve 101a at the top of the filter element 3a, thus realizing the filtration function.

[0165] When cleaning filter element 3a in the filter, motor 82a starts, and main gear 83a, in conjunction with driven gear 84a, drives adjusting pipe 2a to rotate counterclockwise. As adjusting pipe 2a rotates, it moves downward, causing filter element 3a to rotate and move downward through slider 2041a and sliding groove 2011a. Filter element 3a moves until the bottom of transition pipe 31a contacts the bottom of the inner wall of outer casing 1a, and the sealing nozzle at the bottom of transition pipe 31a is inserted into the inlet pipe 102a. The second sealing block 62a enters the interior of transition pipe 31a. At this time, inlet pipe 102a is connected to the interior of filter element 3a. Simultaneously, filter element 3a, through connecting arm 71a, drives filter element 72 into the interior of drain pipe 41a. Drain pipe 41a is then connected to the interior of outer casing 1a, allowing the wastewater generated during the cleaning of filter element 3a to be discharged.

[0166] Since the connecting arm 71a is rotatably connected to the transition tube 31a, the valve core 72a does not need to rotate when the filter element 3a rotates.

[0167] At this time, the motor 82a continues to drive the regulating pipe 2a to rotate counterclockwise. At this time, the regulating pipe 2a and the water outlet pipe 204a of the filter element 3a are relatively displaced. The slider 2041a moves downward relative to the slide groove 2011a and moves to the bottom of the slide groove 2011a. At this time, the first sealing block 203a is embedded in the interior of the water outlet pipe 204a, and the bottom of the second pipe body 202a contacts the protective sleeve 101a.

[0168] The subsequent motor 82a drives the regulating pipe 2a to rotate clockwise and counterclockwise, which in turn drives the filter element 3a to rotate back and forth. This allows the cleaning water to work together with the washing water to backwash the filter element from the inside out, thereby improving the cleaning effect.

[0169] After cleaning, the motor 82a drives the adjusting pipe 2a to engage with the protective sleeve 101a through the thread and move upward, so that the first sealing block 203a is separated from the water outlet pipe 204a, and the water outlet pipe 204a is reconnected with the adjusting pipe 2a. The second sealing block 62a then seals the transition pipe 31a.

[0170] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A multi-unit water pump system, characterized in that, include: Compressors, Freon refrigerant pipes, electromagnetic four-way valves, electromagnetic three-way valves, air heat exchangers, expansion valves, filters, energy storage hot water tanks, clean filters, sanitary water heaters, heat recovery units, gas-liquid separators, as well as chilled water supply pipes, chilled water return pipes, distributed chilled water pumps, electric regulating valves, electric ball valves, water flow sensors, water pressure sensors, and terminal equipment. The separate chilled water pump circulates the chilled water in the energy storage and heat exchange tank separately to each terminal device to achieve cold or hot supply; The separate chilled water pump draws the air washing water and condensate from the terminal equipment into the chilled water pipeline network for cold energy recovery and removal of suspended pollutants in the air. The clean filter cleans and filters the chilled water, and then automatically removes the dirt through a dedicated pipeline; The water flow sensor monitors the water flow of each terminal device in real time and implements intelligent dynamic adjustment of each terminal device through the main controller to achieve dynamic balance. The heat recovery unit recovers and recirculates the waste heat of the terminal devices for heating. The water heat exchanger in the sanitary water heater recovers the waste heat from cooling. The electromagnetic three-way valve includes a first electromagnetic three-way valve, a second electromagnetic three-way valve, a third electromagnetic three-way valve, a fourth electromagnetic three-way valve, and a fifth electromagnetic three-way valve; the energy storage hot water tank is equipped with a third water heat exchanger and a fourth water heat exchanger; the sanitary water heater is equipped with a first water heat exchanger and a second water heat exchanger; the heat recovery unit includes a first heat recovery unit and a second heat recovery unit. One end of the compressor is connected to the first port of the electromagnetic four-way valve, the second port of the electromagnetic four-way valve is connected to the first port of the fifth electromagnetic three-way valve through a Freon refrigerant pipe, the second port of the fifth electromagnetic three-way valve is connected to the first port of the fourth electromagnetic three-way valve, one end of the third water heat exchanger and the fourth water heat exchanger are respectively connected to the second port and the third port of the fourth electromagnetic three-way valve, and the other end of the third water heat exchanger and the fourth water heat exchanger are respectively connected to the inlet of the filter after being merged through Freon refrigerant pipes; The filter refrigerant outlet, expansion valve, air heat exchanger, and first electromagnetic three-way valve are connected in series via Freon refrigerant pipe. The second port of the first electromagnetic three-way valve is connected to the third port of the electromagnetic four-way valve. The fourth port of the electromagnetic four-way valve is connected to the other end of the compressor via a gas-liquid separator. The third port of the first electromagnetic three-way valve is connected to the first port of the third electromagnetic three-way valve through a Freon refrigerant pipe. The second port of the third electromagnetic three-way valve is connected to one end of the first water heat exchanger. The other end of the first water heat exchanger is connected to the pipeline of the air heat exchanger through a Freon refrigerant pipe. The third port of the fifth electromagnetic three-way valve is connected to one end of the second water heat exchanger, and the other end of the second water heat exchanger is connected to the filter inlet through a Freon refrigerant pipe. The first heat recovery unit and the second heat recovery unit are respectively connected to the first port and the second port of the second electromagnetic three-way valve. The third port of the second electromagnetic three-way valve is connected to the third port of the third electromagnetic three-way valve. The other end of the first heat recovery unit and the second heat recovery unit are respectively connected to the pipeline of the air heat exchanger after being merged through the Freon refrigerant pipe. One end of the chilled water supply pipe is connected to the energy storage and heat exchange tank, and the other end is connected to the water inlet of the terminal equipment. One end of the chilled water return pipe is connected to the outlet of the terminal equipment, and the other end of the chilled water return pipe is connected to the energy storage and heat exchange tank after passing through a clean filter.

2. The pump-distributed multi-unit system according to claim 1, characterized in that, The electromagnetic three-way valve is connected to a first refrigerant output pipe and a second refrigerant output pipe, and the electromagnetic three-way valve realizes the switching of refrigerant flow between the first refrigerant output pipe and the second refrigerant output pipe.

3. The pump-distributed multi-unit system according to claim 1, characterized in that, The chilled water return pipe is equipped with a water supply pipe interface, and the chilled water return pipe is connected to a water supply pipe through the water supply pipe interface. An electric ball valve is installed on the water supply pipe.

4. The pump-distributed multi-unit system according to claim 1, characterized in that, Each of the aforementioned terminal devices is equipped with a separate chilled water pump, an electric regulating valve, a check valve, and a water flow sensor.

5. The pump-distributed multi-unit system according to claim 1, characterized in that, The terminal equipment includes an air handling unit, and the water pump split multi-unit system also includes a water collection pan. Each air handling unit is also equipped with an air washing and decontamination device, a water pressure sensor, and an electric ball valve. The inlet of the electric ball valve is located at the bottom of the water collection pan, and the outlet of the electric ball valve is connected to the suction end of the split chilled water pump through a three-way pipe.

6. The pump-distributed multi-unit system according to claim 1, characterized in that, The energy storage and hot water exchange tank is an open-type tank. The energy storage and hot water exchange tank is divided into upper and lower heat exchange zones by a partition. Each heat exchange zone is equipped with a fluorinated heat exchanger. The partition has water passage holes. The energy storage and hot water exchange tank is equipped with a water level sensor and a temperature sensor.

7. The pump-distributed multi-unit system according to claim 6, characterized in that, The energy storage and hot water exchange tank is equipped with a chilled water supply pipe interface, a first chilled water return pipe interface, and a second chilled water return pipe interface. The chilled water supply pipe interface is located in the middle of the lower section of the energy storage and hot water exchange tank. The first chilled water return pipe interface is located at the bottom of the lower section of the energy storage and hot water exchange tank and is located on the opposite side of the chilled water supply pipe interface. The second chilled water return pipe interface is located at the top of the upper section of the energy storage and hot water exchange tank and is located on the same side as the chilled water supply pipe interface.

8. The pump-distributed multi-unit system according to claim 7, characterized in that, Both the first chilled water return pipe interface and the second chilled water return pipe interface are equipped with electric ball valves.

9. The pump-distributed multi-unit system according to claim 1, characterized in that, Also includes: The main unit, third water heat exchanger, parallel pipe, and chilled water return pipe; The main unit is connected to the third water heat exchanger in the energy storage and hot water exchange tank via the Freon refrigerant pipe. The energy storage and hot water exchange tank connects the terminal devices in parallel via the chilled water supply pipe, the chilled water return pipe, the parallel pipe, and the clean filter, which together form a chilled water pump-distributed central air handling system.

10. The pump-distributed multi-unit system according to claim 9, characterized in that, The chilled water supply pipe interface is located at one-quarter of the height of the energy storage and heat exchange tank, and the chilled water return pipe interface is located at the top of the energy storage and heat exchange tank and on the opposite side of the chilled water supply pipe interface.

Images