Automatic cleaning device for air conditioner plate heat exchanger

Abstract

The utility model discloses an automatic cleaning device for an air conditioner plate heat exchanger, which is characterized in that the primary side of the air conditioner plate heat exchanger is respectively connected with a drainage reservoir and an energy management station, and an electrically operated valve module, a pressure sensor, a booster pump and a flow monitoring module are arranged on a pipeline for connecting the primary side of the air conditioner plate heat exchanger with the energy management station; the electric valve module, the pressure sensor, the pressure pump and the flow monitoring module are respectively connected with the core control system board, and the core control system board is in two-way communication with a client. According to the automatic cleaning device for the air conditioner plate heat exchanger, the state switching of the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the fifth electric valve and the pressure pump is achieved through the core control system board, so that backwashing and automatic cleaning of the air conditioner plate heat exchanger in a short time are completely achieved, shutdown is not needed, the cleaning time is obviously shortened, and the working efficiency is improved. The intelligent level is obviously improved, the experience feeling and comfort of a user are not affected, and the method is suitable for industrial popularization and application.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange, and in particular relates to an automatic cleaning device for an air conditioner panel exchanger. Background Art

[0002] The central air conditioning heat exchange of small units generally adopts a plate exchange system, which has the advantages of small size and high efficiency, but the disadvantage is that it has high requirements for water quality. The air conditioning plate exchanger is composed of multiple stainless steel plates stacked together to form the primary and secondary sides. It is an important component for air conditioning energy conversion. Thin rectangular channels are formed between the plates, and heat is exchanged through the plates. In actual use, impurities in the air conditioning plate exchanger need to be cleaned regularly, but the current cleaning method is mainly manual cleaning, which is time-consuming and labor-intensive, usually takes about 100 hours, and also requires downtime, which reduces the user experience and comfort. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide an automatic cleaning device for an air conditioner panel.

[0004] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the utility model is:

[0005] An automatic cleaning device for an air conditioning panel changer, wherein the primary side of the air conditioning panel changer is respectively connected to a drainage reservoir and an energy management station, an electric valve module, a pressure sensor, a pressure pump and a flow monitoring module are arranged on the pipeline connecting the primary side of the air conditioning panel changer and the energy management station, the electric valve module, the pressure sensor, the pressure pump and the flow monitoring module are respectively connected to a core control system board, and the core control system board communicates with a client in a two-way manner.

[0006] Furthermore, the water outlet and water inlet on the primary side of the air conditioning panel are connected to the energy management station through pipeline 1 and pipeline 2 respectively, the pipeline 1 is connected to the drainage water reservoir through the condensate return pipe, and the pipeline 2 is connected to the drainage water reservoir through the side pipeline.

[0007] Furthermore, the electric valve module includes electric valve one, electric valve two, electric valve three, electric valve four and electric valve five. Electric valve one and electric valve three are arranged on pipeline one, electric valve two is arranged on pipeline two, electric valve four is arranged on the side pipeline, and electric valve five is arranged at the residue discharge outlet of the drainage reservoir.

[0008] Furthermore, there are two pressure sensors, which are respectively arranged on pipeline one and pipeline two. Pipeline two is also provided with a Y-type filter and a flow monitoring module, and a pressure pump is provided on the condensate return pipe.

[0009] Furthermore, a pH value monitoring module and a temperature monitoring module are provided on the primary side of the air conditioning panel. The pH value monitoring module, pressure sensor, temperature monitoring module and flow monitoring module are respectively connected to the input end of the core control system board, and the output end of the core control system board is connected to the electric valve module and the booster pump.

[0010] Furthermore, the temperature monitoring module uses two DS18B20 temperature sensors, which are respectively arranged at the water inlet and the water outlet of the primary side, so as to facilitate the calculation of the temperature difference between the water inlet and the water outlet through the core control system board.

[0011] Furthermore, the core control system board communicates bidirectionally with the client via a Bluetooth module.

[0012] Furthermore, the drainage reservoir is provided with an alum stone layer, an activated carbon adsorption layer, a gravel layer, a RO reverse osmosis membrane layer and a PP cotton layer in sequence from top to bottom.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model discloses an automatic cleaning device for an air-conditioning panel changer, wherein a primary side of the air-conditioning panel changer is respectively connected to a drainage reservoir and an energy management station, an electric valve module, a pressure sensor, a pressure pump and a flow monitoring module are arranged on a pipeline connecting the primary side of the air-conditioning panel changer and the energy management station, the electric valve module, the pressure sensor, the pressure pump and the flow monitoring module are respectively connected to a core control system board, the core control system board communicates with a client in a two-way manner, and the switching of the states of electric valve one, electric valve two, electric valve three, electric valve four, electric valve five and the pressure pump is realized through the core control system board, thereby fully realizing short-time (within 20 minutes) backwashing and automatic cleaning of the air-conditioning panel changer without stopping the machine for operation, significantly shortening the cleaning time, significantly improving the intelligence level, and not affecting the user's experience and comfort, and collecting information in the panel changer by arranging a pH value monitoring module, a pressure sensor, a temperature monitoring module and a flow monitoring module, providing instant and quantitative data for scientifically judging the operating state of the panel changer, empowering and increasing the efficiency of the panel changer cleaning operation, and being suitable for industrial promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the alum stone layer, activated carbon adsorption layer, gravel layer, RO reverse osmosis membrane layer and PP cotton layer of the utility model;

[0017] Figure 3 It is a structural block diagram of the utility model;

[0018] Figure 4This is a circuit diagram of the core control system board of the utility model;

[0019] Figure 5 It is a circuit diagram of the L298N driver of the utility model. DETAILED DESCRIPTION

[0020] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0022] like Figure 1-5As shown, an automatic cleaning device for an air conditioning panel changer includes a pH value monitoring module 1, an electric valve module, a pressure pump 2, a pressure sensor 3, a temperature monitoring module 4, a flow monitoring module 5 and a Y-type filter 6, wherein the electric valve module includes an electric valve 1 7, an electric valve 2 8, an electric valve 3 9, an electric valve 4 10, and an electric valve 5 11. The air conditioning panel changer is composed of a primary side 12 and a secondary side 13 composed of a plurality of stainless steel plates stacked together. The water outlet and the water inlet of the primary side 12 of the air conditioning panel changer are connected to an energy management station 16 through a pipeline 1 14 and a pipeline 2 15 respectively. The pipeline 1 14 is provided with an electric valve 1 7, a pressure sensor 3, and a pressure sensor 4. and electric valve three 9, a Y-type filter 6, an electric valve two 8 and a flow monitoring module 5 are arranged on the pipeline two 15, a pH value monitoring module 1 and a temperature monitoring module 4 are installed at the primary side 12, the pH value monitoring module 1, the pressure sensor 3, the temperature monitoring module 4 and the flow monitoring module 5 are respectively connected to the input end of the core control system board (PLC or single-chip microcomputer), the output end of the core control system board is connected to the electric valve module and the booster pump 2, the core control system board communicates with the client bidirectionally through the Bluetooth module, and the pH value monitoring module 1 is used to monitor the pH value of the water quality at the primary side 12 and transmit it to the core control system board for processing The pressure sensor 3 on the pipeline 14 is used to monitor the water pressure at the outlet of the primary side 12 and transmit it to the core control system board for processing. A pressure sensor 3 (not shown) is also set on the pipeline 2 15 and is used to monitor the water pressure at the water inlet of the primary side 12 and transmit it to the core control system board for processing, so that the pressure difference between the water inlet and the water outlet is calculated by the core control system board. The temperature monitoring module 4 is used to monitor the water temperature at the primary side 12 and transmit it to the core control system board for processing. The flow monitoring module 5 is installed at the cold source water supply end of the energy management station 16 entering the central port of the air-conditioning equipment. The flow monitoring module 5 is used to monitor The water flow rate of the water inlet 12 on the primary side is transmitted to the core control system board for processing. The pipeline 14 is connected to the drainage reservoir 18 through the condensate return pipe 17. The condensate return pipe 17 is provided with a booster pump 2. The pipeline 2 15 is connected to the drainage reservoir 18 through the side pipe 19. The side pipe 19 is provided with an electric valve 4 10. The drainage reservoir 18 is provided with an alum layer 20, an activated carbon adsorption layer 21, a gravel layer 22, an RO reverse osmosis membrane layer 23 and a PP cotton layer 24 from top to bottom, which has a multi-layer filtering and purification effect. The residue discharge port 25 of the drainage reservoir 18 is provided with an electric valve 5 11.

[0023] In the utility model, the client sends control instructions to the core control system board through the Bluetooth module. According to the control instructions, the water environment detection data (including water pressure, water temperature, and flow monitoring data) can be uploaded and the start and stop status of the electric valve module and the booster pump 2 can be controlled. The core control system board drives the pressure sensor 3, the temperature monitoring module 4, and the flow monitoring module 5 to collect data (water pressure, water temperature, and flow monitoring data) and analyze and process the data. The water environment detection data is uploaded to the client for display through the Bluetooth module, which is convenient for the staff to view remotely and make timely responses.

[0024] The temperature monitoring module 4 uses two DS18B20 temperature sensors, which are respectively arranged at the water inlet and the water outlet of the primary side 12, so as to facilitate the calculation of the temperature difference between the water inlet and the water outlet through the core control system board.

[0025] An automatic cleaning method for an air conditioner panel includes the following steps:

[0026] The water pressure at the electric valve 2 8 is high, and the cold source water from the energy management station 16 flows from the electric valve 2 8 to the electric valve 1 7, enters the primary side 12, and returns to the cold source of the energy management station 16 through the pipeline 1 14;

[0027] When the flow rate monitoring module 5 detects that the water flow rate at the water inlet of the primary side 12 is less than the preset value 104.9 l / s, and the temperature difference between the water inlet and the water outlet of the primary side 12 is 7°C, and the pressure difference is higher than the preset value 65.7 Pa, it means that the energy conversion efficiency is too low, and the core control system board sends an early warning to the client that the pipeline must be cleaned;

[0028] By installing electric valve one 7 and electric valve three 9 on pipeline one 14, by installing electric valve two 8 on pipeline two 15, by installing electric valve four 10 on side pipeline 19, and by installing booster pump 2 on condensate return pipe 17, the core control system board detects the control instructions transmitted by the Bluetooth module. When a monitoring data upload instruction is determined, the core control system board obtains water pressure, temperature and flow data through pressure sensor 3, temperature monitoring module 4 and flow monitoring module 5 respectively and performs calculations. When an operating status control instruction is determined, the core control system board outputs corresponding PWM signals through D9 and D10 pins, and is driven by L298N driver to realize the switching of the states of electric valve one 7, electric valve two 8, electric valve three 9, electric valve four 10, electric valve five 11 and booster pump 2, thereby realizing automatic cleaning and backwashing of the plate exchanger.

[0029] By installing electric valve 1 7, electric valve 2 8, and electric valve 3 9, when performing automatic cleaning, disconnect electric valve 1 7, wait for 10 seconds, and then disconnect electric valve 2 8, to form a quantitative pressure difference of 1.4Mpa inside the plate changer. At the same time, open electric valve 4 10 to allow atmospheric pressure to enter the device normally. The water pressure inside the plate changer is 1.4Mpa, which is higher than the atmospheric pressure at the electric valve 4 10. In order to release the pressure, the high-pressure water inside the plate changer surges to the electric valve 4 10 with a small pressure. Due to the huge pressure difference, the impurities inside the plate changer are taken out by a large amount of water flow, achieving the purpose of cleaning the residue. At the same time, in order to prevent the impurities flushed out from damaging the environment in the air-conditioning room, a drainage reservoir 18 is connected to the electric valve four 10 to collect the sewage after the plate heat exchanger is cleaned. After multiple filtration and sedimentation through the alum stone layer 20, the activated carbon adsorption layer 21, the gravel layer 22, the RO reverse osmosis membrane layer 23 and the PP cotton layer 24, the sewage is layered, and the purified water enters the condensate return pipe 17 through the pressure pump 2, and flows back to the plate heat exchanger. The residue is quantitatively cleaned and discharged through the residue discharge port 25 of the drainage reservoir 18 through the electric valve five 11.

[0030] The core control system board controls the electric valve 1 7, electric valve 2 8, electric valve 3 9, electric valve 4 10, electric valve 5 11 and the booster pump 2 driven by the L298N driver by sending PWM signals to change the operating status of the electric valve 1 7, electric valve 2 8, electric valve 3 9, electric valve 4 10, electric valve 5 11 and the booster pump 2.

[0031] The L298N driver uses the L298N dual H-bridge DC motor driver chip, which can realize bidirectional control of the DC motor. The L298N driver has two power supply terminals, including a 12V power supply terminal and a 5V power supply terminal. The 12V power supply terminal can receive 7V-35V power supply, and contains a voltage stabilization part to convert the voltage into 5V for output and 5V components, while the 5V power supply terminal uses 5V power supply. The utility model uses 7V voltage for power supply and outputs 5V voltage for use by the core control system board, realizing independent power supply and mobility.

[0032] ENA and ENB are the enable and control terminals of the L298N driver, which control the output of the drive signal; IN1-IN4 are control terminals, which determine the states of the electric valve 1 7, the electric valve 2 8, the electric valve 3 9, the electric valve 4 10, the electric valve 5 11 and the booster pump 2. The states of the electric valve 1 7, the electric valve 2 8, the electric valve 3 9, the electric valve 4 10, the electric valve 5 11 and the booster pump 2 are shown in Table 1.

[0033] Table 1

[0034] Electric valve one Electric valve 2 Electric valve three Electric valve four Electric valve five Booster pump State 1 (one flush) off off off On off On State 2 (Secondary Flush) On off off On off On Status 3 (flushing completed) On On On off off off State 4 (cleaning up residue) On On On off On off

[0035] The four OUT output terminals of the L298N driver are connected to two DC motors through voltage stabilizing diodes. The drive signal output from the output terminal is controlled by the four IN (IN1-IN4) input terminal signals. The drive signal is a 5V TTL level and can control state 1, state 2, state 3, and state 4. ENA and ENB can control the output of the motor end control signal.

[0036] The LM7805 three-terminal regulator converts the 7V voltage into a 5V voltage for use and output by the L298N driver, providing power for the entire system to work independently.

[0037] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0038] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An automatic cleaning device for air conditioner panel, characterized in that: The primary side of the air-conditioning panel is respectively connected to the drainage reservoir and the energy management station. An electric valve module, a pressure sensor, a booster pump and a flow monitoring module are arranged on the pipeline connecting the primary side of the air-conditioning panel and the energy management station. The electric valve module, the pressure sensor, the booster pump and the flow monitoring module are respectively connected to the core control system board. The core control system board communicates with the client in a bidirectional manner.

2. The automatic cleaning device for air conditioner panel according to claim 1 is characterized in that: The water outlet and water inlet on the primary side of the air conditioning panel are connected to the energy management station through pipeline 1 and pipeline 2 respectively. The pipeline 1 is connected to the drainage water reservoir through the condensate return pipe, and the pipeline 2 is connected to the drainage water reservoir through the side pipeline.

3. The automatic cleaning device for air conditioner panel according to claim 2 is characterized in that: The electric valve module includes electric valve one, electric valve two, electric valve three, electric valve four and electric valve five. Electric valve one and electric valve three are arranged on pipeline one, electric valve two is arranged on pipeline two, electric valve four is arranged on the side pipeline, and electric valve five is arranged at the residue discharge outlet of the drainage reservoir.

4. The automatic cleaning device for air conditioner panel according to claim 3 is characterized in that: There are two pressure sensors, which are respectively arranged on pipeline one and pipeline two. Pipeline two is also provided with a Y-type filter and a flow monitoring module. A pressure pump is arranged on the condensate return pipe.

5. The automatic cleaning device for air conditioner panel according to claim 1, characterized in that: The primary side of the air conditioning panel is provided with a pH value monitoring module and a temperature monitoring module. The pH value monitoring module, pressure sensor, temperature monitoring module and flow monitoring module are respectively connected to the input end of the core control system board, and the output end of the core control system board is connected to the electric valve module and the booster pump.

6. The automatic cleaning device for air conditioner panel according to claim 5, characterized in that: The temperature monitoring module adopts DS18B20 temperature sensor.

7. The automatic cleaning device for air conditioner panel according to claim 1, characterized in that: The core control system panel communicates bidirectionally with the client via the Bluetooth module.

8. The automatic cleaning device for air conditioner panel according to claim 1, characterized in that: The drainage water storage tank is provided with an alum stone layer, an activated carbon adsorption layer, a gravel layer, a RO reverse osmosis membrane layer and a PP cotton layer in sequence from top to bottom.

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