A faucet cleaning waste heat recovery system and control method

Abstract

The present invention belongs to the technical field of faucet processing, and in particular, relates to a faucet cleaning waste heat recovery system and control method; the system includes: a plurality of cleaning tanks, which are provided with cleaning liquid contained therein and are used to clean the faucets; a filter, which receives and filters the cleaning waste liquid discharged from the cleaning tank; a waste heat receiving water tank, which is used to temporarily store the liquid filtered by the filter; a main heat exchanger, which uses the liquid in the waste heat receiving water tank as a heat exchange medium to perform secondary preheating on the water before entering the cleaning tank; a secondary heat exchanger, which reuses the heat exchange medium discharged from the main heat exchanger to perform primary preheating on the water that will enter the main heat exchanger; a cleaning heater, which is used to heat the water that has been preheated for the second time by the main heat exchanger; a cleaning storage water tank, which is used to store and keep warm the water heated by the heater, and to obtain the cleaning liquid that can be directly transported to the cleaning tank in a proportional manner; and a clean water tank, which is used to store the water that is transported to the secondary heat exchanger for primary preheating.

Description

Technical Field

[0001] The present invention belongs to the technical field of faucet processing, and particularly relates to a faucet cleaning waste heat recovery system and a control method therefor. Background Art

[0002] A faucet is a common name for a water valve, used to control the size of the water flow switch, and has the effect of saving water. Traditional faucet blanks are usually formed by sand casting, gravity casting or die casting. After forming, the blank is removed of the riser and core residue, and the surface is preliminarily polished by barrel polishing. The preliminarily polished blank is milled, drilled and tapped to obtain a semi-finished faucet body. The semi-finished faucet body is then polished, cleaned and electroplated to obtain a wear-resistant and high-gloss faucet body. The cleaning effect affects the quality of the later electroplated product; faucet cleaning is generally to immerse the faucet in a cleaning liquid at a certain temperature for ultrasonic cleaning, so as to improve the cleaning effect; the waste liquid after cleaning still has a certain temperature, and direct discharge into the waste water tank for treatment will cause a certain amount of heat energy waste. Summary of the Invention

[0003] The purpose of the present invention is to provide a system and a control method for recycling and reusing waste heat in cleaning waste liquid during faucet cleaning in view of the above-mentioned existing technical problems.

[0004] In view of this, the present invention provides a faucet cleaning waste heat recovery system, comprising:

[0005] Cleaning tanks, several of which are provided, containing cleaning liquid therein for cleaning faucets;

[0006] A filter for receiving and filtering the cleaning waste liquid discharged from the cleaning tank;

[0007] A waste heat receiving water tank for temporarily storing the liquid filtered by the filter;

[0008] A main heat exchanger using the liquid in the waste heat receiving water tank as a heat exchange medium to preheat the water before entering the cleaning tank for the second time;

[0009] A secondary heat exchanger for reusing the heat exchange medium discharged from the main heat exchanger to preheat the water to be entered into the main heat exchanger for the first time;

[0010] A cleaning heater for heating the water preheated for the second time by the main heat exchanger;

[0011] A cleaning storage water tank for storing and insulating the water heated by the heater and obtaining a cleaning liquid that can be directly transported to the cleaning tank according to a ratio;

[0012] A clean water tank for storing the water transported to the secondary heat exchanger for the first preheating.

[0013] In the above technical solution, further, it further includes:

[0014] A waste heat reuse pipeline, which discharges the cleaning liquid waste discharged from the cleaning tank to the outside through a multi-section pipeline in sequence through a filter, a waste heat receiving water tank, a main heat exchanger, and a secondary heat exchanger;

[0015] A cleaning liquid conveying pipeline, which conveys the water discharged from the water tank to the inside of the cleaning storage water tank through a multi-section pipeline in sequence through a secondary heat exchanger, a main heat exchanger, and a cleaning heater, and then conveys the cleaning liquid in the cleaning storage water tank to the cleaning tank.

[0016] An auxiliary lifting pipeline, which is arranged on the cleaning liquid conveying pipeline and has one end connected to the outlet end of the cleaning heater and the other end connected to the cleaning storage water tank;

[0017] Among them, the auxiliary lifting pipeline includes an auxiliary branch pipeline with an auxiliary heater, and an auxiliary main pipeline arranged on the auxiliary branch pipeline and bridging both ends on both sides of the auxiliary heater; one end of the auxiliary branch pipeline is connected to the outlet end of the cleaning heater, and the other end is connected to the cleaning storage water tank;

[0018] And a switching valve is arranged at the connection between the auxiliary branch pipeline and the auxiliary main pipeline, and the switching valve is used to control the liquid to pass through the auxiliary main pipeline or the auxiliary heater.

[0019] In the above technical solution, further, it further includes:

[0020] A temperature sensing module, which includes a plurality of temperature sensors to detect the temperature of the cleaning waste liquid and water;

[0021] A pumping module, which includes a plurality of transfer pumps to ensure the hydraulic pressure of the cleaning waste liquid and water during the conveying process;

[0022] A control cabinet, which contains electrical components such as a controller, a control circuit, and a frequency converter, and is used to control the operation of the waste heat recovery system;

[0023] A flow rate detection module, which includes a plurality of flow rate detectors;

[0024] Among them, the temperature sensing module and the flow rate detection module feed the detected data back to the controller, and the controller programmatically controls the operation of the pumping module and the cleaning heater.

[0025] In the above technical solution, further, it further includes:

[0026] A cleaning agent dosing module, which is arranged on the cleaning storage water tank and is used to dose the cleaning agent into the cleaning storage water tank;

[0027] A stirring module, which is arranged inside the cleaning storage water tank and is used to fully mix the cleaning agent and water to form a cleaning liquid;

[0028] A concentration detection module for detecting the concentration of the cleaning agent in the cleaning storage tank;

[0029] A heat preservation heater is arranged in the cleaning storage tank to heat and keep warm the cleaning liquid when its temperature drops.

[0030] A control method for a waste heat recovery system of faucet cleaning includes:

[0031] Step 1, preset the preset water temperature T of the cleaning liquid in the cleaning storage tank 预设 , that is, the temperature of the cleaning liquid conveyed into the cleaning tank;

[0032] Step 2, obtain the current operation data of the system. The operation data includes the water temperature of the clean water tank, the temperature of the liquid discharged from the waste heat receiving tank, the current output power of the cleaning heater, and the output power of the clean water delivery pump;

[0033] Step 3, obtain the pre-heat exchange temperature T of the water after passing through the secondary heat exchanger and the primary heat exchanger according to the water temperature in the clean water tank and the temperature of the cleaning waste liquid discharged from the cleaning tank 预换 ;

[0034] Step 4, determine the pre-heating temperature T of the water after passing through the cleaning heater according to the pre-heat exchange temperature T 预换 of the water discharged from the primary heat exchanger and the current output power of the cleaning heater 预加 ;

[0035] Step 5, compare the pre-heating temperature T 预加 with the preset water temperature T 预设 of the cleaning liquid in the cleaning storage tank, and readjust the output power of the cleaning heater according to the size relationship between T 预加 and T 预设 .

[0036] In the above technical solution, further, in step 5:

[0037] If T 预加 > T 预设 , then reduce the output power of the cleaning heater;

[0038] If T 预加 < T 预设 , then increase the output power of the cleaning heater.

[0039] In the above technical solution, further, it also includes:

[0040] Step 6, detect the actual heat exchange temperature T 实换 of the water discharged from the primary heat exchanger, establish a heat exchange deviation coefficient according to the relationship between the actual heat exchange temperature T 实换 and the pre-heat exchange temperature T 预换 , and this heat exchange deviation coefficient is used in step 5 in the next cycle;

[0041] Step 7. Repeat Steps 2 to 6;

[0042] wherein in the next cycle, Step 5 is to determine the heat application temperature T 预加 based on the preheating temperature T and the deviation coefficient 应加 , and compare the heat application temperature T 应加 with the preset water temperature T of the cleaning liquid in the cleaning storage tank 预设 , and adjust the output power of the cleaning heater according to the relationship between T 应加 and T 预设 .

[0043] The beneficial effects of the present invention are as follows:

[0044] 1. The setting of the waste heat recovery system can reuse the waste heat in the cleaning waste liquid of the faucet, exchange heat of the cleaning liquid of the faucet with this heat, thereby improving the heat utilization rate of the cleaning waste liquid, and heating the heat-exchanged water by setting a cleaning heater to ensure the temperature of the cleaning liquid entering the cleaning tank, and at the same time, it can reduce the energy consumed by the cleaning heater due to heating;

[0045] 2. By applying this control method, the temperature of the cleaning liquid entering the cleaning tank can be ensured, and at the same time, it can prevent the cleaning heater from overheating and increasing the energy consumption. Description of the Drawings

[0046] Figure 1 is a schematic structural diagram of the system of the present invention;

[0047] Figure 2 is a control schematic diagram of the control method of the present invention;

[0048] Figure 3 is a control schematic diagram of Step 5 in the first cycle of the control method of the present invention;

[0049] Figure 4 is a control schematic diagram of Step 5 in the next cycle of the control method of the present invention;

[0050] The markings in the figure are represented as: 1 - cleaning tank, 2 - filter, 3 - waste heat receiving water tank, 4 - main heat exchanger, 5 - secondary heat exchanger, 6 - cleaning heater, 7 - cleaning storage tank, 8 - clean water tank, 9 - auxiliary heater, 10 - auxiliary branch pipeline, 11 - auxiliary main pipeline, 12 - switching valve, 13 - heat exchange source delivery pump, 14 - clean water delivery pump, 15 - electric control sewage discharge valve, 16 - sewage delivery pump, 17 - cleaning liquid delivery pump, 18 - flow solenoid valve, 19 - overflow pipe, 20 - electric control discharge valve. Detailed Embodiments

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0052] Embodiment 1:

[0053] This embodiment provides a faucet cleaning waste heat recovery system, including:

[0054] A plurality of cleaning tanks are provided, which contain cleaning liquid for cleaning the faucets;

[0055] A filter, receiving and filtering the cleaning waste liquid discharged from the cleaning tank;

[0056] The waste heat receiving water tank is used to temporarily store the liquid after being filtered by the filter;

[0057] The main heat exchanger uses the liquid in the waste heat receiving water tank as the heat exchange medium to preheat the water before it enters the cleaning tank;

[0058] The secondary heat exchanger reuses the heat exchange medium discharged from the main heat exchanger to preheat the water that will enter the main heat exchanger.

[0059] A cleaning heater is used to heat the water that has been preheated twice by the main heat exchanger;

[0060] The cleaning storage water tank is used to store and keep warm the water heated by the heater, and to mix the water in proportion to obtain the cleaning liquid that can be directly delivered to the cleaning tank;

[0061] Clean water tank, used to store water for primary preheating to the secondary heat exchanger.

[0062] In this embodiment, the cleaning tank is equipped with an ultrasonic cleaner. The ultrasonic cleaner and a cleaning liquid with a certain temperature can ensure the cleaning ability of the faucet surface oil and foreign matter, thereby ensuring the effect of the later electroplating. The filter is used to filter foreign matter such as metal debris in the cleaning waste liquid to prevent foreign matter from accumulating in the main heat exchanger and the secondary heat exchanger, and can facilitate the collection and cleaning of foreign matter. In order to reduce heat loss, the filter and the preheating water tank are both insulated. And the system can also be used to clean other metal or non-metal parts other than the faucet.

[0063] The waste heat receiving water tank is used to temporarily store the waste liquid filtered by the filter, and then transport the filtered waste liquid with a certain amount of heat to the main heat exchanger as a heat exchange medium. If the capacity of the cleaning tank is V and the number is N, the capacity of the waste heat receiving water tank is V*N*1.2.

[0064] The cleaning storage tank stores a certain amount of cleaning liquid for cleaning the cleaning tank, and the cleaning storage tank is heat-insulated. The capacity of the cleaning storage tank is V * N * 1.5.

[0065] The fresh water tank stores fresh water. The fresh water source of the fresh water tank can be obtained by filtering the workshop wastewater or directly be municipal water. A fresh water control valve can be set at the water outlet of the fresh water tank. The water discharged from the fresh water tank is first preheated through the secondary heat exchanger, that is, using the cleaning waste liquid with lower heat as the heat exchange medium for heat exchange; then it is heat-exchanged through the main heat exchanger, that is, using the cleaning waste liquid with higher temperature for heat exchange; since the waste liquid for primary heat utilization discharged from the main heat exchanger still has a certain amount of heat, through two heat exchanges, the heat utilization rate of the cleaning waste liquid can be improved, and at the same time, the preheating effect on the fresh water can be ensured; and the water after secondary preheating through the main heat exchanger is finally heated through the cleaning heater, so as to ensure the water temperature of the cleaning liquid in the cleaning storage tank. The capacity of the fresh water tank is V * N * 2.

[0066] In the waste heat recovery system, the way to replace the cleaning liquid in the cleaning tank is as follows: N cleaning tanks drain water in sequence in a cycle, and the next cleaning tank can only be drained after the cleaning waste liquid in the corresponding cleaning tank is completely drained. After all the cleaning waste liquid in the corresponding cleaning tank is drained, new cleaning liquid is conveyed to the cleaning tank. At the same time, during the cleaning process of the cleaning tank, the cleaning storage tank continuously conveys new cleaning liquid to the cleaning tank, and an overflow pipe is arranged above the cleaning tank, and the end of the overflow pipe is connected to the filter, so as to ensure the purity of the cleaning liquid to a certain extent and improve the cleaning effect of the cleaning tank.

[0067] Embodiment 2:

[0068] This embodiment provides a faucet cleaning waste heat recovery system. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0069] It also includes:

[0070] A waste heat reuse pipeline, through which the cleaning liquid waste discharged from the cleaning tank is sequentially discharged outside through a filter, a waste heat receiving water tank, a main heat exchanger and a secondary heat exchanger through multiple sections of pipelines;

[0071] A cleaning liquid conveying pipeline, through which the water discharged from the fresh water tank is sequentially input into the cleaning storage tank through a secondary heat exchanger, a main heat exchanger and a cleaning heater through multiple sections of pipelines, and then the cleaning liquid in the cleaning storage tank is conveyed to the cleaning tank.

[0072] An auxiliary lifting pipeline, which is arranged on the cleaning liquid conveying pipeline and one end is connected to the outlet end of the cleaning heater, and the other end is connected to the cleaning storage tank;

[0073] The auxiliary lifting pipeline includes an auxiliary branch pipeline with an auxiliary heater, and an auxiliary main pipeline arranged on the auxiliary branch pipeline and bridging both ends on both sides of the auxiliary heater; one end of the auxiliary branch pipeline is connected to the outlet end of the cleaning heater, and the other end is connected to the cleaning storage water tank;

[0074] A switching valve is arranged at the connection between the auxiliary branch pipeline and the auxiliary main pipeline, and the switching valve is used to control the liquid to pass through the auxiliary main pipeline or the auxiliary heater.

[0075] In this embodiment, the waste heat reuse pipeline is used to smoothly transport the cleaning waste liquid discharged from the cleaning tank to each component; and the outer parts of each pipeline of the waste heat reuse pipeline are heat-insulated; and the cleaning liquid delivery pipeline can smoothly pass water through each heating component and then transport it to the cleaning tank after forming the cleaning liquid. The auxiliary lifting pipeline is arranged to heat the water to the auxiliary heater when the water temperature after being heated by the cleaning heater is much lower than the preset water temperature, so as to ensure the water temperature in the cleaning storage water tank; and when the water temperature heated by the cleaning heater is within the predetermined range, it is directly transported to the cleaning storage water tank through the auxiliary main pipeline. In order to ensure automatic control, the switching valve is selected as a two-position three-way solenoid valve. When the spool of the two-position three-way solenoid valve is in the first position, the water is directly transported to the cleaning storage water tank through the auxiliary main pipeline. When the spool is in the second position, the water enters the cleaning storage water tank after being heated by the auxiliary heater. In order to ensure the smooth flow of the liquid and prevent backflow, several one-way valves can be respectively arranged on the waste heat reuse pipeline, the cleaning liquid delivery pipeline and the auxiliary lifting pipeline, and an electric control discharge valve is arranged at the discharge port of the waste heat receiving water tank.

[0076] Embodiment 3:

[0077] This embodiment provides a faucet cleaning waste heat recovery system, which, in addition to including the technical solutions of the above embodiments, further has the following technical features.

[0078] It further includes:

[0079] A temperature sensing module, including multiple temperature sensors, for detecting the temperature of the cleaning waste liquid and water;

[0080] A pumping module, including multiple delivery pumps, for ensuring the hydraulic pressure during the transportation of the cleaning waste liquid and water;

[0081] A control cabinet, which contains electrical components such as a controller, a control circuit and a frequency converter, for controlling the operation of the waste heat recovery system;

[0082] A flow rate detection module, including multiple flow rate detectors;

[0083] Among them, the temperature sensing module and the flow rate detection module feedback the detected data to the controller, and the controller programmatically controls the operation of the pumping module and the cleaning heater.

[0084] In this embodiment, the temperature sensing module respectively detects the temperatures of the heat exchange medium, the heating medium, and the cleaning liquid through the combination of multiple temperature sensors, and the temperature of the heating medium can be controlled more precisely through the controller. The temperature sensors can be respectively arranged at the discharge port of the waste heat receiving water tank, the outlet of the heating medium of the main heat exchanger, the drain port of the cleaning heater, and inside the cleaning storage water tank.

[0085] The pumping module is set to ensure the hydraulic pressure in each pipeline. A heat exchange source transfer pump can be arranged between the pipelines of the waste heat receiving water tank and the main heat exchanger, and a clean water transfer pump can be arranged on the pipeline between the clean water tank and the secondary heat exchanger; at the same time, in order to ensure that the cleaning waste liquid in the cleaning tank can be discharged smoothly, an electronically controlled sewage discharge valve and a sewage transfer pump can be arranged on the pipeline connected between the sewage discharge port of each cleaning tank and the filter. The sewage transfer pump can be a small sewage pump, and the ends of the pipelines connected to the drainage ports of several cleaning tanks are all connected to the inlet end of the same filter; a high-power cleaning liquid transfer pump is arranged on the pipeline for the cleaning storage water tank to transport the cleaning liquid to the cleaning tank. The transfer pump can pump the cleaning liquid to multiple cleaning tanks in the system at the same time, and a flow solenoid valve is arranged at the water inlet of each cleaning tank, and an upper limit liquid level sensor and a lower limit liquid level sensor are arranged in each cleaning tank. The flow solenoid valve is controlled by the controller programming, and the upper limit liquid level sensor and the lower limit liquid level sensor transmit the sensed liquid levels to the controller.

[0086] The flow rate detection module is used to detect the flow rate of the water discharged from the main heat exchanger and detect whether the heat reuse pipeline is blocked, so as to adjust or maintain it in time through the pumping module when the flow rate is too fast or too slow. Among them, the flow rate detection module and the temperature sensing module feedback the detected flow rate information and temperature information to the controller. Then the controller determines the output states of the pumping module, the electronically controlled sewage discharge valve, the electronically controlled discharge valve, the cleaning heater pump, the switching valve, and the auxiliary heater according to the data analysis, and controls the heating power of the cleaning heater. At the same time, the electronically controlled discharge valve is controlled by the controller programming to control the external discharge of the liquid in the waste heat receiving water tank during the operation of the system.

[0087] The lower limit liquid level sensor in the cleaning tank senses whether the cleaning waste liquid is completely discharged when discharging the cleaning waste liquid from the cleaning tank. During the process of discharging the cleaning liquid from the cleaning tank, the corresponding flow solenoid valve is in the closed state. After the cleaning liquid is completely discharged, the corresponding flow solenoid valve is opened and the opening degree is kept at the maximum. After the cleaning liquid reaches the liquid level sensed by the upper limit liquid level sensor, the opening degree of the flow solenoid valve is adjusted to 10% of the maximum opening degree, so as to continuously supplement the cleaning liquid during the cleaning process of the cleaning tank, and the liquid level sensed by the upper limit liquid level sensor is lower than the height of the overflow pipe.

[0088] Embodiment 4:

[0089] This embodiment provides a faucet cleaning waste heat recovery system. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0090] It further includes:

[0091] A cleaning agent dosing module, which is arranged on the cleaning storage water tank and is used to dose the cleaning agent into the cleaning storage water tank;

[0092] A stirring module, which is arranged in the cleaning storage water tank and is used to fully mix the cleaning agent and water to form a cleaning solution;

[0093] A concentration detection module, which is used to detect the concentration of the cleaning agent in the cleaning storage water tank;

[0094] A heat preservation heater, which is arranged in the cleaning storage water tank and is used to heat and keep warm the cleaning solution when its temperature drops.

[0095] In this embodiment, the cleaning agent dosing module is arranged on the cleaning storage water tank. The cleaning agent is dosed into the cleaning storage water tank through the cleaning agent dosing module, and the cleaning solution is obtained by mixing the cleaning agent and heated clean water; the provided heat preservation heater is used to further heat and keep warm the water temperature in the cleaning storage water tank, so as to ensure that the cleaning solution in the cleaning storage water tank can reach the temperature for being transported to the cleaning tank. The stirring module includes a stirring shaft and a stirring motor. The stirring motor is arranged on the top of the cleaning storage water tank, and the stirring module is programmed and controlled by a controller. The setting of the stirring module can ensure the mixing effect of the cleaning agent and clean water. The concentration detection module is used to detect the concentration of the cleaning agent in the cleaning solution to ensure that the mixed cleaning solution can achieve a good cleaning effect of removing foreign matters such as oil stains. Among them, both the stirring module and the heat preservation heater are programmed and controlled by the controller. The concentration detection module feeds the detected data back to the controller. When the concentration of the cleaning agent in the cleaning storage water tank decreases, the controller controls the cleaning agent dosing module to dose the cleaning agent into the cleaning storage water tank and controls the stirring module to mix the cleaning solution. During the process of dosing the cleaning agent, the cleaning solution delivery pump is in a stopped state.

[0096] Embodiment 5:

[0097] This embodiment provides a control method for a faucet cleaning waste heat recovery system. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0098] The control method includes:

[0099] Step 1, preset the preset water temperature T of the cleaning solution in the cleaning storage water tank 预设 , that is, the temperature for transporting the cleaning solution into the cleaning tank;

[0100] Step 2: Obtain the current operating data of the system. The operating data includes the water temperature in the fresh water tank, the temperature of the liquid in the waste heat receiving tank for discharging, the current output power of the cleaning heater, and the output power of the fresh water delivery pump.

[0101] Step 3: Based on the water temperature in the fresh water tank and the temperature of the cleaning waste liquid discharged from the cleaning tank, obtain the pre-heat exchange temperature T of the water after passing through the secondary heat exchanger and the primary heat exchanger. 预换 ;

[0102] Step 4: Determine the pre-heating temperature T of the water after passing through the cleaning heater based on the pre-heat exchange temperature T of the water after discharging from the primary heat exchanger and the current output power of the cleaning heater. 预换 ; 预加 ;

[0103] Step 5: Compare the pre-heating temperature T 预加 with the preset water temperature T of the cleaning liquid in the cleaning storage tank. 预设 Based on the magnitude relationship between T 预加 and T 预设 , readjust the output power of the cleaning heater.

[0104] In this embodiment, the control method first pre-sets the temperature of the cleaning liquid in the cleaning storage tank, then preliminarily determines the water temperature after two heat exchanges based on the water temperature of the heat exchange source in the waste heat receiving tank for discharging and the water temperature in the fresh water tank, and then compares this water temperature with the preset water temperature in the cleaning storage tank, so as to readjust the output power of the cleaning heater. In this way, while ensuring the water temperature in the cleaning storage tank, it can reduce the energy waste caused by overheating of the cleaning heater. At the same time, the maximum power and minimum power for heating by the cleaning heater are pre-set in the controller. When the pre-heating temperature is still far lower under the condition of maximum power heating of the cleaning heater, start the auxiliary heater or reduce the power of the fresh water delivery pump. And before running Step 1, it is default that all cleaning tanks in the system are in the working state. If none of the cleaning tanks in the system are working and there is no cleaning liquid before the control method runs, then inject cleaning liquid into each in turn until all cleaning tanks start working and then run Step 1. Before the system stops running, close the cleaning liquid delivery pump, and then discharge the cleaning waste liquid in each cleaning tank in turn. During this waste liquid discharging process, Steps 1 to 5 are still run until the water level in the cleaning storage tank reaches the upper limit, then control the fresh water delivery pump to stop pumping fresh water into the cleaning liquid delivery pipeline, and at the same time control the heat exchange source delivery pump to stop pumping the cleaning waste liquid to the other end of the waste heat reuse pipeline. At this time, if there is a cleaning tank that is not emptied, the discharged cleaning waste liquid is stored in the waste heat receiving tank after passing through the filter. In this system, in order to ensure that the heat of the heat exchange medium can be fully utilized, the output power of the heat exchange source delivery pump is a constant value, and it is only in the starting or stopping state.

[0105] Example 6:

[0106] This embodiment provides a control method for a faucet cleaning waste heat recovery system. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0107] In step five:

[0108] If T 预加 > T 预设 , then reduce the output power of the cleaning heater;

[0109] If T 预加 = T 预设 , then maintain the output power of the cleaning heater;

[0110] If T 预加 < T 预设 , then increase the output power of the cleaning heater.

[0111] In this embodiment, based on the relationship between T 预加 and T 预设 , it is determined that at the current output power, when T 预加 > T 预设 , it can be preliminarily determined that the heating temperature of the cleaning liquid passing through the cleaning heater is higher than the temperature of the cleaning liquid stored in the cleaning storage tank. In order to reduce energy consumption, the output power of the cleaning heater can be reduced. When T 预加 < T 预设 , it can be preliminarily determined that the heating temperature of the water after passing through the cleaning heater is lower than the temperature of the cleaning liquid stored in the cleaning storage tank, which is likely to result in an insufficient temperature of the cleaning liquid obtained after mixing in the cleaning storage tank and affect the cleaning effect to a certain extent. Therefore, it is necessary to increase the output power of the cleaning heater; through this control method, the energy consumption of the cleaning heater is minimized while ensuring the temperature and effect of the cleaning liquid.

[0112] Embodiment 7:

[0113] This embodiment provides a control method for a faucet cleaning waste heat recovery system. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0114] It further includes:

[0115] Step six, detect the actual heat exchange temperature T 实换 of the water discharged from the main heat exchanger, and establish a heat exchange deviation coefficient based on the relationship between the actual heat exchange temperature T 实换 and the pre-heat exchange temperature T 预换 . This heat exchange deviation coefficient is used in step five in the next cycle;

[0116] Step seven, repeat steps two to six;

[0117] In the next cycle, step five is to preheat the temperature T 预加 Determine the heating temperature T with the coefficient of deviation 应加 , the heating temperature T 应加 and the preset water temperature T of the cleaning fluid in the cleaning storage tank 预设 For comparison, according to T 应加 With T 预设 Adjust the output power of the cleaning heater according to the relationship.

[0118] In this embodiment, the cycle frequency of steps 2 to 6 in the control method is 30-50S / time, and the cycle time is 3-10S; and since the output power of the clean water delivery pump affects the flow rate of water, it will have a certain impact on the heat exchange effect, so the actual exchange temperature T is adjusted according to the output power of the clean water delivery pump. 实换 With preheating temperature T 预换 The heat transfer deviation coefficient is determined based on the error in the relationship, and the heat transfer deviation coefficient obtained under the current cycle is used for the next cycle, thereby reducing the corresponding output power of the clean water delivery pump to the preheating temperature T 预加 The resulting deviation.

[0119] Embodiment 8:

[0120] This embodiment provides a control method for a faucet cleaning waste heat recovery system, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0121] The controller has a preset correction temperature coefficient ±T 加△ , T 加△ Can be 2;

[0122] Step 5 includes: preheating temperature T 预加 Determine the heating temperature T with the heat transfer deviation coefficient 应加 ; If the heating temperature T 应加 Subtract the preset water temperature T 预设 Is a positive number and its value is less than ﹢T 加△ , that is, the heating temperature T 应加 Subtract the preset water temperature T 预设 The value of is positive and less than 2; or the heating temperature T 应加 Subtract the preset water temperature T 预设 is 0, that is, the heating temperature T 应加 Subtract the preset water temperature T 预设 The value of is equal to 0; the power of the current cleaning heater and clean water delivery pump are maintained.

[0123] In this embodiment, the correction coefficient T 加△The temperature difference range of the cleaning liquid allowed for cleaning the storage water tank. The temperature difference range can be taken as ±2. When the temperature is slightly higher or slightly lower than the preset water temperature and has little impact on the cleaning effect, this temperature difference can be ignored, and the power of the current cleaning heater and the clean water delivery pump is maintained; if the temperature difference range is not within the set range, other operations are performed. And T 加△ It can be adjusted according to the type of cleaning agent and the area of the cleaning tank.

[0124] Example 9:

[0125] This embodiment provides a control method for the waste heat recovery system of faucet cleaning. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0126] In step five, if the heat response temperature T 应加 minus the preset water temperature T 预设 is a positive number and the value is greater than +T 加△ , that is, the value of the heat response temperature T 应加 minus the heating temperature T 实换 is a positive number and the value is greater than 2, the output power of the cleaning heater can be reduced, or the output power of the current cleaning heater can be maintained, and the output power of the clean water delivery pump can be increased.

[0127] In this embodiment, when the heat response temperature T 应加 far exceeds the preset water temperature T 预设 , the controller reduces the heating output power of the cleaning heater or increases the output power of the clean water delivery pump to reduce the value of the heat response temperature T 应加 , and further controls the heating temperature T 应加 within the temperature range suitable for cleaning the cleaning tank.

[0128] Example 10:

[0129] This embodiment provides a control method for the waste heat recovery system of faucet cleaning. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0130] In step five:

[0131] If the heat response temperature T 应加 minus the preset water temperature T 预设 is a negative number and the value is greater than -T 加△ , that is, the value of the heat response temperature T 应加 minus the heating temperature T 实换 is a negative number and greater than -2, the power of the current cleaning heater and the clean water delivery pump is maintained;

[0132] If the heat response temperature T 应加 minus the preset water temperature T 预设 is a negative number and the value is less than -T加△ but greater than -2*T 加△ , that is, the heat response temperature T 应加 subtract the heating temperature T 实换 If the value is negative and less than -2 but greater than -4, the output power of the cleaning heater can be increased, or the current output power of the cleaning heater can be maintained and the output power of the clean water delivery pump can be reduced.

[0133] If the heat response temperature T 应加 subtract the preset water temperature T 预设 is negative and the value is less than -2*T 加△ , that is, the heat response temperature T 应加 subtract the heating temperature T 实换 If the value is negative and less than -4, the output power of the cleaning heater can be increased while the output power of the clean water delivery pump can be reduced.

[0134] In this embodiment, the situation where the heat response temperature T 应加 is lower than the preset water temperature T 预设 is controlled in three intervals. According to the situation where the heat response temperature T 应加 is lower than the preset water temperature T 预设 , the delivery situation of the cleaning heater and the clean water delivery pump is controlled, so as to ensure that the heat response temperature T 应加 subtract the preset water temperature T 预设 is within a controllable range to ensure the temperature of the cleaning liquid in the cleaning storage tank.

[0135] Embodiment 11:

[0136] This embodiment provides a control method for the waste heat recovery system of the faucet cleaning, which has the following technical features in addition to the technical solutions of the above embodiments.

[0137] Step six also includes detecting the actual heat temperature T of the water discharged from the cleaning heater 实热 , the heat response temperature T 应加 is lower than the preset water temperature T 预设 , then the switching valve controls the liquid to pass through the auxiliary branch pipeline and starts the auxiliary heater to assist in heating the water, and then transports it to the cleaning storage tank.

[0138] In this technical solution, by detecting the actual temperature of the water discharged from the cleaning heater, if the actual temperature is still lower than the preset water temperature T 预设 , the water can be assisted in heating by the auxiliary heater, so as to ensure that the water will not be lower than the preset water temperature T 预设 before being input into the cleaning storage tank; and the cooperation with step five can perform secondary intervention on the water temperature to avoid the reduction of the temperature of the cleaning storage tank and affect the cleaning effect. Among them, the lower actual heat temperature T 实热When the temperature of the cleaning liquid in the cleaning storage tank is equal to that when cleaning the storage tank, the auxiliary heater and the heat preservation heater are in a state of stopping heating.

[0139] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A control method for a faucet cleaning waste heat recovery system, characterized in that: include: A cleaning tank (1) containing cleaning liquid for cleaning the faucet; A filter (2) receives and filters the cleaning waste liquid discharged from the cleaning tank (1); A waste heat receiving water tank (3) for temporarily storing liquid filtered by the filter (2); The main heat exchanger (4) uses the liquid in the waste heat receiving water tank (3) as a heat exchange medium to perform secondary preheating on the water before it enters the cleaning tank (1); The secondary heat exchanger (5) reuses the heat exchange medium discharged from the main heat exchanger (4) to preheat the water that will enter the main heat exchanger (4); A cleaning heater (6) for heating the water preheated for the second time by the main heat exchanger (4); A cleaning storage water tank (7) is used to store and keep warm the water heated by the heater, and to mix the water in proportion to obtain a cleaning liquid that can be directly delivered to the cleaning tank (1); A clean water tank (8) for storing water to be transported to the secondary heat exchanger (5) for initial preheating; Control methods include: Step 1: setting a preset water temperature T of the cleaning liquid in the cleaning storage water tank (7) 预设 , i.e. the temperature of the cleaning liquid delivered to the cleaning tank (1); Step 2, obtaining current operating data of the system, wherein the operating data includes the water temperature of the clean water tank (8), the temperature of the liquid in the waste heat receiving water tank (3), and the heating power of the cleaning heater (6); Step 3: According to the water temperature in the clean water tank (8) and the temperature of the cleaning waste liquid discharged from the cleaning tank (1), the preheating temperature T of the water after passing through the secondary heat exchanger (5) and the main heat exchanger (4) is obtained. 预换 ; Step 4: according to the preheating temperature T of the water after it leaves the main heat exchanger (4), 预换 The preheating temperature T of the water after the cleaning heater (6) is determined by the heating power of the cleaning heater (6). 预加 ; Step 5: Preheating temperature T 预加 and preset water temperature T 预设 For comparison, according to T 预加 With T 预设 The heating power of the re-cleaning heater (6) is adjusted according to the size relationship; Step 5 If T 预加 >T 预设 , the heating power of the cleaning heater (6) is reduced; If T 预加 <T 预设 , the heating power of the cleaning heater (6) is increased; Also includes: Step 6: Detect the actual exchange temperature T of the water discharged from the main heat exchanger (4) 实换 , according to the actual temperature T 实换 With preheating temperature T 预换 The heat transfer deviation coefficient is established based on the relationship between the heat transfer deviation coefficient and the heat transfer deviation coefficient is used in step five in the next cycle; In the next cycle, step five is to preheat the temperature T 预加 Determine the heating temperature T with the heat transfer deviation coefficient 应加 , the heating temperature T 应加 and the preset water temperature T of the cleaning liquid in the cleaning storage water tank (7) 预设 For comparison, according to T 应加 With T 预设 The heating power of the cleaning heater (6) is adjusted according to the relationship.

2. The control method of a faucet cleaning waste heat recovery system according to claim 1, characterized in that: Also includes: The waste heat recycling pipeline is used to discharge the cleaning liquid waste discharged from the cleaning tank (1) through a plurality of pipeline sections, in sequence, through a filter (2), a waste heat receiving water tank (3), a main heat exchanger (4) and a secondary heat exchanger (5) and then discharged externally; A cleaning liquid delivery pipeline, which uses a plurality of pipeline sections to sequentially transfer water discharged from a clean water tank (8) through a secondary heat exchanger (5), a primary heat exchanger (4) and a cleaning heater (6) and then inputs the water into a cleaning storage water tank (7), and then delivers the cleaning liquid in the cleaning storage water tank (7) to a cleaning tank (1); The auxiliary lifting pipeline is arranged on the cleaning liquid delivery pipeline and has one end connected to the outlet end of the cleaning heater (6) and the other end connected to the cleaning storage water tank (7).

3. The control method of a faucet cleaning waste heat recovery system according to claim 1 or 2, characterized in that: Also includes: A temperature sensing module, including a plurality of temperature sensors, for detecting the temperature of the cleaning liquid, waste liquid and water; The pumping module includes multiple delivery pumps to ensure the hydraulic pressure of cleaning liquid, waste liquid and water during the delivery process; Control cabinet, which contains controller, control circuit and frequency converter, used to control the operation of waste heat recovery system; A flow rate detection module, comprising a plurality of flow rate detectors; The temperature sensing module and the flow rate detection module feed back the detected data to the controller, and the controller controls the operation of the pumping module and the cleaning heater.

4. The control method of a faucet cleaning waste heat recovery system according to claim 3, characterized in that: Also includes: A cleaning agent delivery module, arranged on the cleaning storage water tank (7), and used for delivering cleaning agent into the cleaning storage water tank (7); A stirring module, arranged in the cleaning storage water tank (7), for fully mixing the cleaning agent and water; A concentration detection module, used to detect the concentration of the cleaning agent in the cleaning storage water tank (7); A heat preservation heater is arranged in the cleaning storage water tank (7) to heat and preserve the cleaning liquid.

5. The control method of a faucet cleaning waste heat recovery system according to claim 4, characterized in that: Also includes: The controller has a preset correction temperature coefficient ±T 加△ ; Step five also includes: According to the preheating temperature T 预加 Determine the heating temperature T with the heat transfer deviation coefficient 应加 If the heating temperature T 应加 Subtract the preset water temperature T 预设 Is a positive number and its value is less than ﹢T 加△ The current heating power of the cleaning heater (6) is then maintained.

6. The control method of a faucet cleaning waste heat recovery system according to claim 5, characterized in that: In step 5, if the heating temperature T 应加 Subtract the preset water temperature T 预设 Is a positive number and its value is greater than ﹢T 加△ The heating power of the current cleaning heater (6) is then reduced.

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