Dosing device and heat pump air conditioning system

Abstract

The utility model discloses a dosing device and heat pump air conditioning system, dosing device includes monitoring module, at least two medicament tank, at least two pumping piece, at least two medicament tank is used for holding at least two corrosion inhibitor respectively, at least two pumping piece is connected with at least two medicament tank respectively, and at least two pumping piece is connected with heat exchange pipeline, and the monitoring module is connected with the heat exchange pipeline. The monitoring module is connected with the heat exchange pipeline and comprises a concentration monitoring part used for monitoring the concentration of the corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline. According to the embodiment of the utility model, the mode of automatically pumping the corrosion inhibitor to the heat exchange pipeline through the pumping piece can improve the dosing accuracy and dosing efficiency of the corrosion inhibitor compared with the mode of manually adding the corrosion inhibitor.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump air conditioning technical field especially relates to a dosing device and heat pump air conditioning system. BACKGROUND

[0002] The heat pump air conditioning system is an air conditioning system using heat pump technology for refrigeration and heating. The heat pump air conditioning system usually includes an inner circulation device and an outer circulation device, wherein the inner circulation device is used to provide heat source for users in winter and cold source for users in summer, and the outer circulation device is used to provide winter heating and summer heat absorption for the circulating water of the inner circulation device.

[0003] In the running environment of winter, the circulating medium used by the outer circulation device usually includes inorganic or organic antifreeze, which has strong corrosiveness. In order to prevent corrosion, corrosion inhibitor needs to be added in the circulating medium. The existing addition of corrosion inhibitor is usually manually operated, however, the manual addition of corrosion inhibitor has problems of inaccurate dosing and low dosing efficiency. SUMMARY

[0004] The utility model provides a dosing device and heat pump air conditioning system, aims at at least solve the technical problem that the prior art manual addition of corrosion inhibitor has problems of inaccurate dosing and low dosing efficiency.

[0005] In the first aspect, the utility model provides a dosing device, which is applied to a heat pump air conditioning system, the heat pump air conditioning system includes a cooling tower and a heat pump unit, the cooling tower and the heat pump unit are connected through heat exchange pipeline, and the dosing device includes:

[0006] At least two medicine tanks are used to contain at least two kinds of corrosion inhibitors respectively.

[0007] At least two pumping parts are connected with at least two medicine tanks respectively and connected with the heat exchange pipeline.

[0008] A monitoring module is connected with the heat exchange pipeline, and the monitoring module includes a concentration monitoring part for monitoring the concentration of corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline.

[0009] Optionally, the medicine tank has a medicine discharge port and a medicine inlet port, the medicine inlet port is connected with at least two medicine storage boxes, and different medicine storage boxes are used to contain different kinds of corrosion inhibitors.

[0010] The dosing device further includes a dosing pipe and a discharge pipe, the medicine discharge port is connected with the dosing pipe and the discharge pipe through a three-way valve, and one end of the dosing pipe away from the medicine discharge port is connected with the pumping part.

[0011] Optionally, the pumping member is a metering pump, and the medicating device further comprises a control module connected to the pumping member and the concentration monitoring member.

[0012] Optionally, the at least two medicament tanks comprise a first medicament tank and a second medicament tank, and the first medicament tank and the second medicament tank are respectively used for containing a first type of corrosion inhibitor and a second type of corrosion inhibitor.

[0013] The at least two pumping members comprise a first pumping member and a second pumping member, and the first pumping member and the second pumping member are respectively connected to the first medicament tank and the second medicament tank.

[0014] The concentration monitoring member comprises a first concentration monitoring member and a second concentration monitoring member, and the first concentration monitoring member is used for monitoring the concentration of the first type of corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline, and the second concentration monitoring member is used for monitoring the concentration of the second type of corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline.

[0015] Optionally, the medicating device further comprises a first medicament outlet pipe and a second medicament outlet pipe, and the first pumping member is connected to the heat exchange pipeline through the first medicament outlet pipe, and the second pumping member is connected to the heat exchange pipeline through the second medicament outlet pipe.

[0016] The first medicament outlet pipe is provided with a first valve, and the second medicament outlet pipe is provided with a second valve, and the control module is connected to the first valve and the second valve.

[0017] Optionally, the first medicament outlet pipe has a first medicament outlet port away from the first pumping member, and a first flow meter is arranged at one end of the first medicament outlet pipe close to the first medicament outlet port, and the first flow meter is connected to the control module.

[0018] And / or, the second medicament outlet pipe has a second medicament outlet port away from the second pumping member, and a second flow meter is arranged at one end of the second medicament outlet pipe close to the second medicament outlet port, and the second flow meter is connected to the control module.

[0019] The first medicament outlet port is provided with a first back pressure valve; and / or, the second medicament outlet port is provided with a second back pressure valve.

[0020] Optionally, the monitoring module further comprises a pH monitoring member.

[0021] And / or, the monitoring module further comprises a conductivity monitoring member.

[0022] And / or, the monitoring module further comprises a redox potential monitoring member.

[0023] And / or, the monitoring module further comprises a temperature monitoring member.

[0024] And / or, the dosing device further comprises at least two corrosion rate monitoring members.

[0025] Optionally, a first liquid level monitoring member is arranged in the first medicament tank, and a second liquid level monitoring member is arranged in the second medicament tank, and the first liquid level monitoring member and the second liquid level monitoring member are connected to the control module.

[0026] And / or, a first stirrer is arranged in the first medicament tank, and a second stirrer is arranged in the second medicament tank.

[0027] Optionally, a filter is arranged on the dosing pipe.

[0028] In a second aspect, the utility model provides a kind of heat pump air conditioning system, comprising cooling tower, heat pump unit and the dosing device as described above.

[0029] In the embodiment of the utility model, the corrosion inhibitor in the medicament tank can be pumped to the heat exchange pipeline automatically by the pumping member, and by controlling the pumping parameter of the pumping member, the corrosion inhibitor can be accurately added into the heat exchange pipeline, so as to ensure the corrosion prevention effect and prolong the service life of the heat pump air conditioning system.In the embodiment of the utility model, compared with the manual addition of corrosion inhibitor, the method of automatically pumping the corrosion inhibitor to the heat exchange pipeline by the pumping member can improve the dosing accuracy and efficiency of the corrosion inhibitor.In addition, the operation of at least two pumping members can be adjusted to pump the corrosion inhibitor in a single medicament tank or multiple medicament tanks to adjust the dosing mode;for the case that the corrosion inhibitor in at least two medicament tanks is pumped, the pumping amount of each corrosion inhibitor can be adjusted to adjust the dosing amount of each corrosion inhibitor to adjust the dosing mode;in summary, the dosing mode can be adjusted to meet different dosing needs in different seasons or different working conditions.In addition, the concentration monitoring member can monitor the concentration of the corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline in real time, so as to judge whether the concentration of the corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline meets the requirements subsequently.

[0030] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, it can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the utility model more obvious and easy to understand, the specific implementation mode of the utility model is described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The structure diagram of the dosing device provided in the embodiment of the utility model is shown.

[0032] Reference signs:

[0033] 1 - medicament tank, 101 - first medicament tank, 102 - second medicament tank, 2 - medicament adding pipe, 201 - first medicament adding pipe, 202 - second medicament adding pipe, 3 - pumping piece, 301 - first pumping piece, 302 - second pumping piece, 4 - first medicament outlet pipe, 5 - second medicament outlet pipe, 6 - first valve, 7 - second valve, 8 - monitoring module, 9 - control module, 10 - cooling tower, 11 - heat pump unit, 12 - heat exchange pipeline, 1201 - first heat exchange pipeline, 1202 - second heat exchange pipeline, 13 - concentration module. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are illustrated, it is to be understood that the present application is not limited to the embodiments described herein, but can be practiced with variations that will be apparent to those skilled in the art. Rather, the purpose of the embodiments is to convey the substance of the present application, and to fully disclose "the best modes" contemplated by the inventors of developing / exercising the present application.

[0035] At present, in order to prevent corrosion, a corrosion inhibitor needs to be added to the circulating medium used by the external circulation device in the heat pump air conditioning system. The existing addition of the corrosion inhibitor is usually manually operated. However, the manual addition of the corrosion inhibitor has problems such as inaccurate addition and low addition efficiency. In order to solve the above problems, the present application provides a medicament adding device and a heat pump air conditioning system, which will be described in detail below.

[0036] In a first aspect, with reference to Figure 1 The present application provides a medicament adding device applied to a heat pump air conditioning system. The heat pump air conditioning system comprises a cooling tower 10 and a heat pump unit 11. The cooling tower 10 and the heat pump unit 11 are connected through a heat exchange pipeline 12. The medicament adding device comprises a monitoring module 8, at least two medicament tanks 1 and at least two pumping pieces 3. The at least two medicament tanks 1 are respectively used for containing at least two corrosion inhibitors. The at least two pumping pieces 3 are respectively connected with the at least two medicament tanks 1, and the at least two pumping pieces 3 are connected with the heat exchange pipeline 12. The monitoring module 8 is connected with the heat exchange pipeline 12. The monitoring module 8 comprises a concentration monitoring piece for monitoring the concentration of the corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline 12.

[0037] The heat pump air conditioning system is an air conditioning system using heat pump technology for refrigeration and heating. The heat exchange pipeline 12 is used for the flow of circulating medium, and the circulating medium circulates between the cooling tower 10 and the heat pump unit 11 through the heat exchange pipeline 12. In the winter operating environment, the circulating medium flowing in the heat exchange pipeline 12 includes inorganic or organic antifreeze, and in the summer operating environment, the circulating medium flowing in the heat exchange pipeline 12 includes water. The heat exchange pipeline 12 includes a first heat exchange pipeline 1201 and a second heat exchange pipeline 1202. The heat pump unit 11 has a heat pump circulation outlet and a heat pump circulation inlet. The cooling tower 10 has a cooling tower circulation outlet and a cooling tower circulation inlet. The first heat exchange pipeline 1201 connects the cooling tower circulation outlet and the heat pump circulation inlet. The second heat exchange pipeline 1202 connects the heat pump circulation outlet and the cooling tower circulation inlet.

[0038] The corrosion inhibitor is a chemical substance used to slow down or prevent metal corrosion. The material of the medicament tank 1 can be PE (Polyethylene). The number of medicament tanks 1 can be set according to actual needs, for example, two, three, four, etc. The number of medicament tanks 1 is preferably two, and two medicament tanks 1 are used to contain two different corrosion inhibitors. The number of pumping members 3 is connected with the number of medicament tanks 1. The pumping member 3 is used to pump the corrosion inhibitor into the heat exchange pipeline 12. When adding the corrosion inhibitor into the heat exchange pipeline 12, one of the pumping members 3 can be used to pump one kind of corrosion inhibitor, or at least two pumping members 3 can be used to pump at least two kinds of corrosion inhibitors.

[0039] The pumping member 3 is specifically connected with the first heat exchange pipeline 1201, and the monitoring module 8 is specifically connected with the first heat exchange pipeline 1201. The connection position of the monitoring module 8 and the first heat exchange pipeline 1201 is closer to the cooling tower 10 than the connection position of the pumping member 3 and the first heat exchange pipeline 1201, that is, the connection position of the monitoring module 8 and the first heat exchange pipeline 1201 is located on the upstream side of the connection position of the pumping member and the first heat exchange pipeline 1201. The concentration monitoring member is specifically used to monitor the concentration of the corrosion inhibitor in the circulating medium flowing in the first heat exchange pipeline 1201.

[0040] It should be noted that whether in the winter operating environment or in the summer operating environment, the corrosion inhibitor needs to be added to the circulating medium. In one embodiment, the types of corrosion inhibitors added in the winter operating environment and the summer operating environment are different. When the number of medicament tanks 1 and the number of pumping members 3 are both two, one dosing mode can be: in the winter operating environment, one of the pumping members 3 is used to pump one kind of corrosion inhibitor, and in the summer operating environment, the other pumping member 3 is used to pump another kind of corrosion inhibitor, so as to meet the different types of corrosion inhibitor requirements in the winter and summer operating environments.

[0041] In another embodiment, the corrosion inhibitors added in the winter operating environment and the summer operating environment each include at least two corrosion inhibitors, but the dosing amounts of the at least two corrosion inhibitors are different. When the number of the medicament tanks 1 and the number of the pumping members 3 are both two, one dosing mode can be as follows: in the winter operating environment, the two pumping members 3 pump the two corrosion inhibitors, and the first corrosion inhibitor is pumped based on a first pumping amount and the second corrosion inhibitor is pumped based on a second pumping amount; in the summer operating environment, the two pumping members 3 pump the two corrosion inhibitors, and the first corrosion inhibitor is pumped based on a third pumping amount and the second corrosion inhibitor is pumped based on a fourth pumping amount. The first pumping amount is different from the third pumping amount, and the second pumping amount is different from the fourth pumping amount. That is, the pumping amounts of the respective corrosion inhibitors are different for the two different operating environments of the winter and the summer.

[0042] In the embodiment of the utility model, the pumping member 3 can automatically pump the corrosion inhibitor in the medicament tank 1 to the heat exchange pipeline 12, and by controlling the pumping parameters of the pumping member 3, the corrosion inhibitor can be accurately added to the heat exchange pipeline 12, so that the corrosion prevention effect can be guaranteed and the service life of the heat pump air conditioning system can be prolonged. In the embodiment of the utility model, compared with the manual addition of the corrosion inhibitor, the mode of automatically pumping the corrosion inhibitor to the heat exchange pipeline 12 by the pumping member 3 can improve the dosing accuracy and efficiency of the corrosion inhibitor. In addition, the operating conditions of the at least two pumping members 3 can be adjusted to pump the corrosion inhibitor in a single medicament tank 1 or in multiple medicament tanks 1 to adjust the dosing mode. For the case of pumping the corrosion inhibitors in the at least two medicament tanks 1, the pumping amounts of the respective corrosion inhibitors can be adjusted to adjust the dosing amounts of the respective corrosion inhibitors and adjust the dosing mode. In summary, the dosing mode can be adjusted to meet different dosing requirements in different seasons or different operating conditions. In addition, the concentration monitoring member can monitor the concentration of the corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline 12 in real time, so as to subsequently determine whether the concentration of the corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline 12 meets the requirements.

[0043] In an optional embodiment of the utility model, the medicament tank 1 has a medicament discharge port and a medicament inlet port, the medicament inlet port is connected with at least two medicament storage boxes, and different medicament storage boxes are used to accommodate different types of corrosion inhibitors; the medicament adding device further includes a medicament adding pipe 2 and a discharge pipe, the medicament discharge port is connected with the medicament adding pipe 2 and the discharge pipe through a three-way valve, and one end of the medicament adding pipe 2 away from the medicament discharge port is connected with the pumping member 3.

[0044] The filter can be a Y-type filter.

[0045] The number of the medicine storage boxes connected to the medicine inlet of each medicine tank 1 can be two, three, four, etc. The number of the medicine storage boxes connected to the medicine inlet of each medicine tank 1 is preferably two. The at least two medicine tanks 1 include a first medicine tank 101 and a second medicine tank 102, and the first medicine tank 101 and the second medicine tank 102 are respectively used for containing a first type of corrosion inhibitor and a second type of corrosion inhibitor. The first type of corrosion inhibitor includes corrosion inhibitor A and corrosion inhibitor C, and the two medicine storage boxes connected to the medicine inlet of the first medicine tank 101 are respectively used for containing the corrosion inhibitor A and the corrosion inhibitor C. The second type of corrosion inhibitor includes corrosion inhibitor B and corrosion inhibitor D, and the two medicine storage boxes connected to the medicine inlet of the second medicine tank 102 are respectively used for containing the corrosion inhibitor B and the corrosion inhibitor D.

[0046] The medicine storage box is connected to the medicine inlet of the medicine tank 1 through a medicine supplementing pipe. An electric valve is arranged on the medicine supplementing pipe. One mode of adding medicine can be: in the running environment of winter, the first medicine tank 101 and the second medicine tank 102 contain the corrosion inhibitor A and the corrosion inhibitor B respectively, the two types of corrosion inhibitors are pumped by the two pumping members 3, and the corrosion inhibitor A is pumped based on a fifth pumping amount and the corrosion inhibitor B is pumped based on a sixth pumping amount. In the running environment of summer, the types of the corrosion inhibitors contained in the first medicine tank 101 and the second medicine tank 102 are switched, so that the first medicine tank 101 and the second medicine tank 102 contain the corrosion inhibitor C and the corrosion inhibitor D respectively, the two types of corrosion inhibitors are pumped by the two pumping members 3, and the corrosion inhibitor C is pumped based on a seventh pumping amount and the corrosion inhibitor D is pumped based on an eighth pumping amount. The fifth pumping amount, the sixth pumping amount, the seventh pumping amount and the eighth pumping amount can be different from each other or at least two of them can be the same. It should be noted that when the types of the corrosion inhibitors contained in the medicine tank 1 are switched, the current residual corrosion inhibitor in the medicine tank 1 needs to be discharged through the discharge pipe.

[0047] In the embodiment, the current residual corrosion inhibitor in the medicine tank 1 can be discharged and different types of corrosion inhibitors can be supplemented into the medicine tank 1 through the above arrangement, so that the type of the corrosion inhibitor to be added can be switched in different seasons or different working conditions to meet different needs of adding medicine in different seasons or different working conditions.

[0048] In an optional embodiment of the utility model, the pumping member 3 is a metering pump, and the medicine adding device further includes a control module 9 connected to the pumping member 3 and the concentration monitoring member.

[0049] The medicine adding device further comprises a control module, and the control module comprises the control module 9. The control module further comprises a control screen, and the control screen is electrically connected with the control module 9. The control module 9 can comprise a circuit board and a processor, a memory and a wireless signal transceiver arranged on the circuit board, the processor can be a CPU (Central Processing Unit), and the memory can be a ROM (Read-Only Memory). The control module can further comprise a PLC (Programmable Logic Controller) electrically connected with the processor. The control module can further comprise a heat dissipation fan, and the heat dissipation fan is used for dissipating heat of the processor, so that the processor can be protected from overheating.

[0050] The metering pump can be adjusted in variable frequency, and the metering pump can receive signals from the control module 9 and transmit signals to the control module 9. The outlet of the metering pump can be designed as two paths, one of which is used for superpressure backflow, and the other of which is output after protection by a damper. The memory stores a computer program, and the processor is used for executing the computer program. The computer program can comprise a program for automatically adjusting the pumping flow of the metering pump according to the concentration of the corrosion inhibitor, a program for automatically adjusting the type of the corrosion inhibitor in the medicine tank on a set date, and a program for automatically adjusting the pumping amount of each corrosion inhibitor on a set date. The control module 9 is further connected with the electric valve arranged on the medicine supplementing pipe to control the opening and closing of the electric valve.

[0051] The control module 9 is used for controlling the operation of the pumping member 3. The pumping amount of the corrosion inhibitor can be adjusted by adjusting the pumping parameter of the pumping member 3, and the pumping parameter can comprise a pumping time and / or a pumping flow. The concentration monitoring member is further used for sending the monitored concentration of the corrosion inhibitor in the circulating medium to the control module 9, and the control module 9 judges whether the concentration of the corrosion inhibitor in the circulating medium meets the requirements, and if not, adjusts the operation of the pumping member 3, for example, adjusts the pumping flow of the pumping member 3.

[0052] In an optional embodiment of the utility model, at least two pumping members 3 comprise a first pumping member 301 and a second pumping member 302, and the first pumping member 301 and the second pumping member 302 are connected with a first medicine tank 101 and a second medicine tank 102 respectively; the concentration monitoring member comprises a first concentration monitoring member and a second concentration monitoring member, the first concentration monitoring member is used for monitoring the concentration of a first type of corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline 12, and the second concentration monitoring member is used for monitoring the concentration of a second type of corrosion inhibitor in the circulating medium flowing in the heat exchange pipeline 12.

[0053] The medicating device further comprises a first medicating pipe 201 and a first discharging pipe, the first medicating pipe 201 is connected with the first pump 301 at an end far away from the first discharging port, and a filter is arranged on the first medicating pipe 201 and the second medicating pipe 202.

[0054] In an optional embodiment of the utility model, the medicating device further comprises a first medicating pipe 4 and a second medicating pipe 5, the first pump 301 is connected with the heat exchange pipe 12 through the first medicating pipe 4, and the second pump 302 is connected with the heat exchange pipe 12 through the second medicating pipe 5; a first valve 6 is arranged on the first medicating pipe 4, a second valve 7 is arranged on the second medicating pipe 5, and a control module 9 is connected with the first valve 6 and the second valve 7. The first valve 6 and the second valve 7 can be electric valves. The control module 9 is used for controlling the opening and closing of the first valve 6 and the second valve 7.

[0055] In an optional embodiment of the utility model, the first medicating pipe 4 has a first discharging port far away from the first pump 301, a first flow meter is arranged on an end of the first medicating pipe 4 close to the first discharging port, and the first flow meter is connected with the control module 9; and / or, the second medicating pipe 5 has a second discharging port far away from the second pump 302, a second flow meter is arranged on an end of the second medicating pipe 5 close to the second discharging port, and the second flow meter is connected with the control module; a first back pressure valve is arranged in the first discharging port; and / or, a second back pressure valve is arranged in the second discharging port.

[0056] The first flow meter and the second flow meter can be electromagnetic flow meters. Through the arrangement of the first flow meter and the second flow meter, the discharging flow of the first type of corrosion inhibitor and the second type of corrosion inhibitor can be monitored. The discharging flow of the first type of corrosion inhibitor and the second type of corrosion inhibitor monitored by the first flow meter and the second flow meter can be cumulative flow. When the discharging flow of the first type of corrosion inhibitor reaches a first set flow, the first pump 301 can be controlled to stop working, so as to realize quantitative medicating of the first type of corrosion inhibitor. When the discharging flow of the second type of corrosion inhibitor reaches a second set flow, the second pump 302 can be controlled to stop working, so as to realize quantitative medicating of the second type of corrosion inhibitor. Through the arrangement of the first back pressure valve and the second back pressure valve, the first type of corrosion inhibitor and the second type of corrosion inhibitor can be stably introduced into the heat exchange pipe 12.

[0057] In an optional embodiment of the utility model, the monitoring module further comprises a pH monitoring element; and / or, the monitoring module further comprises a conductivity monitoring element; and / or, the monitoring module further comprises an oxidation-reduction potential (ORP) monitoring element; and / or, the monitoring module further comprises a temperature monitoring element; and / or, the dosing device further comprises at least two corrosion rate monitoring elements.

[0058] The pH monitoring element is used to monitor the pH of the circulating medium flowing in the heat exchange pipeline 12. The conductivity monitoring element is used to monitor the conductivity of the circulating medium flowing in the heat exchange pipeline 12. The opening of the blowdown total valve in the heat pump air conditioning system can be controlled according to the conductivity of the circulating medium. The oxidation-reduction potential monitoring element is used to monitor the oxidation-reduction potential of the circulating medium flowing in the heat exchange pipeline 12. The corrosion rate monitoring element is used to monitor the corrosion rate of the metal material. The corrosion rate monitoring element can be a corrosion rate monitoring sensor. The plurality of corrosion rate monitoring elements are distributed at different positions to monitor the corrosion rates of different metal materials. For example, the plurality of corrosion rate monitoring elements include a first corrosion rate monitoring element, a second corrosion rate monitoring element, and a third corrosion rate monitoring element, the first corrosion rate monitoring element is used to monitor the corrosion rate of the galvanized sheet, the second corrosion rate monitoring element is used to monitor the corrosion rate of the carbon steel, and the third corrosion rate monitoring element is used to monitor the corrosion rate of the red copper.

[0059] In an optional embodiment of the utility model, a first liquid level monitoring element is arranged in the first medicament tank 101, a second liquid level monitoring element is arranged in the second medicament tank 102, and the first liquid level monitoring element and the second liquid level monitoring element are connected to the control module 9; and / or, a first stirrer is arranged in the first medicament tank 101, and a second stirrer is arranged in the second medicament tank 102.

[0060] The first liquid level monitoring element can be installed on the first stirrer, and the second liquid level monitoring element can be installed on the second stirrer. The first liquid level monitoring element and the second liquid level monitoring element can both be liquid level sensors, for example, magnetic float liquid level meters. The first liquid level monitoring element is used to monitor the liquid level of the first type of corrosion inhibitor arranged in the first medicament tank 101 and transmit the monitored liquid level of the first type of corrosion inhibitor to the control module. The second liquid level monitoring element is used to monitor the liquid level of the second type of corrosion inhibitor arranged in the second medicament tank 102 and transmit the monitored liquid level of the second type of corrosion inhibitor to the control module.

[0061] When the first type of corrosion inhibitor is pumped, the first pumping member 301 can be controlled to stop working when the first set amount of decrease in the liquid level of the first type of corrosion inhibitor is reached, so as to realize quantitative dosing of the first type of corrosion inhibitor. When the second type of corrosion inhibitor is pumped, the second pumping member 302 can be controlled to stop working when the second set amount of decrease in the liquid level of the second type of corrosion inhibitor is reached, so as to realize quantitative dosing of the second type of corrosion inhibitor. Through the first and second liquid level monitoring members, the liquid level of the first type of corrosion inhibitor in the first medicament tank 101 and the liquid level of the second type of corrosion inhibitor in the second medicament tank 102 can be monitored in real time, so that the first type of corrosion inhibitor can be supplemented into the first medicament tank 101 or the second type of corrosion inhibitor can be supplemented into the second medicament tank 102 subsequently when the liquid level is low. In addition, through the first and second stirrers, the first type of corrosion inhibitor in the first medicament tank 101 and the second type of corrosion inhibitor in the second medicament tank 102 can be stirred, so as to ensure the uniformity of the first and second types of corrosion inhibitors.

[0062] The heat pump air conditioning system can further comprise a concentration module 13 connected with the cooling tower 10 to concentrate the heat exchange medium in the cooling tower 10.

[0063] The dosing device provided in the embodiments of the present application can switch different dosing modes based on a set date. For example, for the cooling tower 10 in the north, the water retention amount is 200 m 3 , and the circulation amount is 600 m 3 / h. In the running environment in winter, the heat exchange medium used in the cooling tower 10 is an anti-freezing agent, the solid content of which is about 20%, the pH is between 8.5 and 9.8, and the running temperature is between -25 and 10℃. The concentration module 13 is running, the maximum temperature of the concentration module 13 is 100℃, and the concentration module 13 can be automatically started according to the water content of the anti-freezing agent. The material of the heat exchange pipeline 12 is ordinary carbon steel, the material of the cooling tower 10 is galvanized sheet, the filler is PVC (Polyvinyl Chloride), and the material of the pipeline of the heat pump unit 11 itself is red copper. Since the three different materials of carbon steel, red copper and galvanized sheet will all be corroded to different degrees in the anti-freezing agent, in order to control the corrosion, corrosion inhibitors need to be added to control the corrosion. The above dosing device adds two types of corrosion inhibitors, corrosion inhibitor A in the first type of corrosion inhibitor and corrosion inhibitor B in the second type of corrosion inhibitor, and pumps the corrosion inhibitor A based on the fifth pumping amount and the corrosion inhibitor B based on the sixth pumping amount.

[0064] The system is started to operate from October of X1 to stop operating in April of X2, the concentration of the corrosion inhibitor is stably controlled in the range of 500ppm±15ppm during the operating period, the corrosion rate monitoring values are as follows: 0.005mm / a for carbon steel, 0.0001mm / a for red copper, and 0.007mm / a for galvanized sheet, all of which are superior to the control indexes, and can ensure the safe and stable operation of the heat pump air conditioning system.

[0065] In May of X2, water is used as the heat exchange medium in the cooling tower 10, the operating temperature is 30-45℃, the pH is between 8.3-9.0, and the concentration module 13 does not operate. The corrosion inhibitor is added through the above-mentioned dosing device, the corrosion inhibitor C in the first type of corrosion inhibitor and the corrosion inhibitor D in the second type of corrosion inhibitor are added, the corrosion inhibitor C is pumped based on the seventh pumping amount, and the corrosion inhibitor D is pumped based on the eighth pumping amount. The operation is until September of X2, the concentration of the corrosion inhibitor is controlled in the range of 60±2ppm during the operating period, the corrosion rate monitoring values are as follows: 0.012mm / a for carbon steel, 0.0001mm / a for red copper, and 0.002mm / a for galvanized sheet, all of which are superior to the control indexes, and can ensure the safe and stable operation of the heat pump air conditioning system.

[0066] It should be noted that X2 is X1 plus 1, and X1 can be set according to actual needs, which is not limited in the embodiment.

[0067] In the second aspect, the utility model provides a kind of heat pump air conditioning system, including cooling tower 10, heat pump unit 11 and the dosing device of the first aspect.

[0068] It should be noted that in this document, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including a …" does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0069] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, which are all within the protection of the utility model.

Claims

1. A medicated device characterized by, The application is applied to a heat pump air conditioning system, the heat pump air conditioning system comprises a cooling tower and a heat pump unit, the cooling tower and the heat pump unit are connected through a heat exchange pipeline, and the dosing device comprises: at least two medicament tanks for containing at least two corrosion inhibitors respectively; at least two pumping elements connected with the at least two medicament tanks respectively and connected with the heat exchange pipeline; a monitoring module connected with the heat exchange pipeline, the monitoring module comprises a concentration monitoring element for monitoring the concentration of corrosion inhibitors in circulating medium flowing in the heat exchange pipeline.

2. The dosing device of claim 1, wherein The medicament tank has a medicament discharge port and a medicament inlet port, at least two storage boxes are connected to the medicament inlet port, and different storage boxes are used for containing different types of corrosion inhibitors; The dosing device further comprises a dosing pipe and a discharge pipe, the medicament discharge port is connected with the dosing pipe and the discharge pipe through a three-way valve, and one end of the dosing pipe away from the medicament discharge port is connected with the pumping element.

3. The dosing device according to claim 1 or 2, characterized in that The pumping element is a metering pump, and the dosing device further comprises a control module connected with the pumping element and the concentration monitoring element.

4. The dosing device of claim 3, wherein The at least two medicament tanks comprise a first medicament tank and a second medicament tank, the first medicament tank and the second medicament tank are used for containing first type corrosion inhibitors and second type corrosion inhibitors respectively; The at least two pumping elements comprise a first pumping element and a second pumping element, the first pumping element and the second pumping element are connected with the first medicament tank and the second medicament tank respectively; The concentration monitoring element comprises a first concentration monitoring element and a second concentration monitoring element, the first concentration monitoring element is used for monitoring the concentration of first type corrosion inhibitors in circulating medium flowing in the heat exchange pipeline, and the second concentration monitoring element is used for monitoring the concentration of second type corrosion inhibitors in circulating medium flowing in the heat exchange pipeline.

5. The dosing device of claim 4, wherein, The dosing device further comprises a first medicament outlet pipe and a second medicament outlet pipe, the first pumping element is connected with the heat exchange pipeline through the first medicament outlet pipe, and the second pumping element is connected with the heat exchange pipeline through the second medicament outlet pipe; A first valve is arranged on the first medicament outlet pipe, a second valve is arranged on the second medicament outlet pipe, and the control module is connected with the first valve and the second valve.

6. The dosing device of claim 5, wherein, The first medicament outlet pipe has a first medicament outlet port away from the first pumping element, a first flow meter is arranged at one end of the first medicament outlet pipe close to the first medicament outlet port, and the first flow meter is connected with the control module; And / or, the second medicament outlet pipe has a second medicament outlet port away from the second pumping element, a second flow meter is arranged at one end of the second medicament outlet pipe close to the second medicament outlet port, and the second flow meter is connected with the control module; A first back pressure valve is arranged in the first medicament outlet port; and / or, a second back pressure valve is arranged in the second medicament outlet port.

7. The medication device of claim 1 or 2, wherein, The monitoring module further comprises a pH monitoring element; And / or, the monitoring module further comprises a conductivity monitoring element; And / or, the monitoring module further comprises a redox potential monitoring element; And / or, the monitoring module further comprises a temperature monitoring element; And / or, the dosing device further comprises at least two corrosion rate monitoring elements.

8. The dosing device of claim 4, wherein, The first medicament tank is provided with a first liquid level monitoring member, and the second medicament tank is provided with a second liquid level monitoring member, and the first liquid level monitoring member and the second liquid level monitoring member are connected with the control module. And / or, the first medicament tank is provided with a first stirrer, and the second medicament tank is provided with a second stirrer.

9. The dosing device of claim 2, wherein, The dosing pipe is provided with a filter.

10. A heat pump air conditioning system characterised in that, The device comprises a cooling tower, a heat pump unit and the dosing device according to any one of claims 1 to 9.

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