Faucet cleaning waste heat recovery system and control method

Abstract

The invention belongs to the technical field of faucet machining, and particularly relates to a faucet cleaning waste heat recovery system and a control method. The system comprises a plurality of cleaning tanks filled with cleaning liquid and used for cleaning the faucet; the filter is used for receiving and filtering the cleaning waste liquid discharged from the cleaning tank; the waste heat receiving water tank is used for temporarily storing the liquid filtered by the filter; the main heat exchanger uses the liquid in the waste heat receiving water tank as a heat exchange medium to secondarily preheat the water before entering the cleaning tank; the secondary heat exchanger is used for reutilizing the heat exchange medium discharged from the main heat exchanger and carrying out primary preheating on water entering the main heat exchanger; the cleaning heater is used for heating the water which is secondarily preheated by the main heat exchanger; the cleaning water storage tank is used for storing and preserving heat of the water heated by the heater and obtaining cleaning liquid which can be directly conveyed to the cleaning tank according to the proportion; and the clear water tank is used for storing water conveyed to the secondary heat exchanger for primary preheating.

Description

Technical Field

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

[0002] Faucet is a popular name for water valve, which is used to control the size of water flow 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 preliminarily surface polished by removing the pouring head and sand core residue, and roller 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 finished product; faucet cleaning is generally to immerse the faucet in a cleaning liquid at a certain temperature for ultrasonic cleaning, which can improve the cleaning effect; and the waste liquid after cleaning still has a certain temperature, and directly discharging it into the wastewater pool for treatment will cause a certain amount of heat energy waste. Summary of the invention

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

[0004] In view of this, the present invention provides a faucet cleaning waste heat recovery system, comprising: A plurality of cleaning tanks are provided, which contain cleaning liquid for cleaning the faucets; A filter, receiving and filtering the cleaning waste liquid discharged from the cleaning tank; The waste heat receiving water tank is used to temporarily store the liquid after being filtered by the filter; 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; 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. A cleaning heater is used to heat the water that has been preheated twice by the main heat exchanger; 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; Clean water tank, used to store water for primary preheating to the secondary heat exchanger.

[0005] In the above technical solution, further, it also includes: The waste heat recycling pipeline uses multiple sections of pipelines to discharge the cleaning liquid waste from the cleaning tank through the filter, waste heat receiving water tank, main heat exchanger and secondary heat exchanger in turn before being discharged; The cleaning liquid delivery pipeline uses multiple sections of pipelines to transfer the water discharged from the clean water tank through the secondary heat exchanger, the main heat exchanger and the cleaning heater in turn and then inputs it into the cleaning storage water tank, and then transports the cleaning liquid in the cleaning storage water tank to the cleaning tank.

[0006] An auxiliary lifting pipeline is arranged on the cleaning liquid delivery pipeline and is connected to the outlet of the cleaning heater at one end and to the cleaning storage water tank at the other end; 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 having two ends bridged 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; A switching valve is provided 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.

[0007] In the above technical solution, further, it also includes: The temperature sensing module includes a plurality of temperature sensors for detecting the temperature of the cleaning waste liquid and water; The pumping module includes multiple delivery pumps to ensure the hydraulic pressure of the cleaning waste liquid and water during the delivery process; Control cabinet, which contains controller, control circuit, inverter and other electrical components, 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 is programmed to control the operation of the pumping module and the cleaning heater.

[0008] In the above technical solution, further, it also includes: A cleaning agent delivery module is provided on the cleaning storage water tank and is used to deliver cleaning agent into the cleaning storage water tank; A stirring module is arranged in the cleaning storage water tank and is used to fully mix the cleaning agent and water to form a cleaning liquid; A concentration detection module, used to detect the concentration of the cleaning agent in the cleaning storage water tank; The heat preservation heater is arranged in the cleaning storage water tank to keep the cleaning liquid warm when the temperature drops.

[0009] A control method for a faucet cleaning waste heat recovery system, comprising: Step 1: Preset the preset water temperature T of the cleaning liquid in the cleaning storage tank 预设 , i.e. the temperature of the cleaning fluid delivered to the cleaning tank; Step 2: Obtain the current operating data of the system, including the water temperature of the clean water tank, the temperature of the liquid in the exhaust waste heat receiving water tank, the current output power of the cleaning heater, and the output power of the clean water delivery pump; Step 3: According to the water temperature in the clean water tank and the temperature of the waste water discharged from the cleaning tank, the preheating temperature T of the water after passing through the secondary heat exchanger and the main heat exchanger is obtained. 预换 ; Step 4: According to the preheating temperature T of the water after discharge from the main heat exchanger 预换 The preheating temperature T of the water after the cleaning heater is determined by the current output power of the cleaning heater. 预加 ; Step 5: Preheating temperature T 预加 and the preset water temperature T of the cleaning fluid in the cleaning storage tank 预设 For comparison, according to T 预加 With T 预设 Readjust the output power of the cleaning heater according to the size relationship.

[0010] In the above technical solution, further, in step 5: If T 预加 >T 预设 , then reduce the output power of the cleaning heater; If T 预加 <T 预设 , then increase the output power of the cleaning heater.

[0011] In the above technical solution, further, it also includes: Step 6: Detect the actual exchange temperature T of the water discharged from the main heat exchanger 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; Step 7, repeat steps 2 to 6; 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.

[0012] The beneficial effects of the present invention are: 1. The waste heat recovery system can reuse the waste heat in the faucet cleaning waste liquid, and use the heat to heat the faucet cleaning liquid, thereby improving the heat utilization rate of the cleaning waste liquid, and by setting a cleaning heater to heat the water after heat exchange to ensure the temperature of the cleaning liquid entering the cleaning tank, while reducing the energy consumed by the cleaning heater due to heating; 2. The application of this control method can ensure the temperature of the cleaning liquid entering the cleaning tank, and at the same time prevent the cleaning heater from overheating and increasing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the system of the present invention; Figure 2 It is a control principle diagram of the control method of the present invention; Figure 3 is a control principle diagram of step five in the first cycle of the control method of the present invention; Figure 4 is a control principle diagram of step five of the control method of the present invention in the next cycle; The markings in the figure are: 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 water 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-electrically controlled sewage valve, 16-sewage delivery pump, 17-cleaning liquid delivery pump, 18-flow solenoid valve, 19-overflow pipe, 20-electrically controlled discharge valve. DETAILED DESCRIPTION

[0014] 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.

[0015] Embodiment 1: This embodiment provides a faucet cleaning waste heat recovery system, including: A plurality of cleaning tanks are provided, which contain cleaning liquid for cleaning the faucets; A filter, receiving and filtering the cleaning waste liquid discharged from the cleaning tank; The waste heat receiving water tank is used to temporarily store the liquid after being filtered by the filter; 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; 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. A cleaning heater is used to heat the water that has been preheated twice by the main heat exchanger; 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; Clean water tank, used to store water for primary preheating to the secondary heat exchanger.

[0016] 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.

[0017] 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.

[0018] The cleaning storage water tank is used to store a certain amount of cleaning liquid for cleaning the cleaning tank, and the cleaning storage water tank has been insulated. The capacity of the cleaning storage water tank is V*N*1.5.

[0019] Clean water is stored in the clean water tank. The clean water source of the clean water tank can be obtained by filtering the workshop wastewater or directly from municipal water. A clean water control valve can be set on the outlet of the clean water tank. The water discharged from the clean water tank is first preheated by the secondary heat exchanger, that is, the cleaning waste liquid with lower heat is used as the heat exchange medium for heat exchange; then it is heat exchanged by the main heat exchanger, that is, the cleaning waste liquid with higher temperature is used for heat exchange; because the waste liquid discharged from the main heat exchanger for the first heat utilization still has a certain amount of heat, the heat utilization rate of the cleaning waste liquid can be improved through two heat exchanges, and the preheating effect of the clean water can be guaranteed at the same time; and the water after the second preheating by the main heat exchanger is finally heated by the cleaning heater, so as to ensure the water temperature of the cleaning liquid in the cleaning storage tank. The capacity of the clean water tank is V*N*2.

[0020] The way to replace the cleaning liquid in the cleaning tank in the waste heat recovery system is as follows: N cleaning tanks are circulated and drained in sequence, and the next cleaning tank can be drained only after the cleaning waste liquid in the corresponding cleaning tank is completely drained, and new cleaning liquid is delivered to the cleaning tank after the cleaning waste liquid in the corresponding cleaning tank is completely drained. At the same time, during the cleaning process of the cleaning tank, the cleaning storage water tank will continuously deliver new cleaning liquid to the cleaning tank, and an overflow pipe is provided on the upper part of the cleaning tank, and the end of the overflow pipe is connected to the filter, so that the purity of the cleaning liquid can be guaranteed to a certain extent, and the cleaning effect of the cleaning tank can be improved.

[0021] Embodiment 2: This embodiment provides a faucet cleaning waste heat recovery system, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0022] Also includes: The waste heat recycling pipeline uses multiple sections of pipelines to discharge the cleaning liquid waste from the cleaning tank through the filter, waste heat receiving water tank, main heat exchanger and secondary heat exchanger in turn before being discharged; The cleaning liquid delivery pipeline uses multiple sections of pipelines to transfer the water discharged from the clean water tank through the secondary heat exchanger, the main heat exchanger and the cleaning heater in turn and then inputs it into the cleaning storage water tank, and then transports the cleaning liquid in the cleaning storage water tank to the cleaning tank.

[0023] An auxiliary lifting pipeline is arranged on the cleaning liquid delivery pipeline and is connected to the outlet of the cleaning heater at one end and to the cleaning storage water tank at the other end; 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 having two ends bridged 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; A switching valve is provided 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.

[0024] In this embodiment, the waste heat recycling pipeline is used to smoothly transport the cleaning waste liquid discharged from the cleaning tank to various components; and the various pipes of the waste heat recycling pipeline have been subjected to insulation treatment; and the cleaning liquid delivery pipeline can smoothly pass water through various heating components and transport it to the cleaning tank after forming the cleaning liquid. The auxiliary lifting pipeline is used to output water to the auxiliary heater for heating when the water temperature after heating by the cleaning heater is much lower than the preset water temperature, thereby ensuring the water temperature in the cleaning storage water tank; and when the water temperature heated by the cleaning heater is within a 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 uses a two-position three-way solenoid valve. When the valve core of the two-position three-way solenoid valve is in the first position, water is directly transported to the cleaning storage water tank through the auxiliary main pipeline. When the valve core is in the second position, water enters the cleaning storage water tank after being heated by the auxiliary heater. In order to ensure smooth liquid flow and prevent backflow, several one-way valves can be installed on the waste heat reuse pipeline, cleaning liquid delivery pipeline and auxiliary lifting pipeline respectively, and an electric-controlled discharge valve is installed on the discharge port of the waste heat receiving water tank.

[0025] Embodiment 3: This embodiment provides a faucet cleaning waste heat recovery system, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0026] Also includes: The temperature sensing module includes a plurality of temperature sensors for detecting the temperature of the cleaning waste liquid and water; The pumping module includes multiple delivery pumps to ensure the hydraulic pressure of the cleaning waste liquid and water during the delivery process; Control cabinet, which contains controller, control circuit, inverter and other electrical components, 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 is programmed to control the operation of the pumping module and the cleaning heater.

[0027] In this embodiment, the temperature sensing module detects the temperature of the heat exchange medium, the heating medium and the cleaning liquid through a combination of multiple temperature sensors, and can more accurately control the temperature of the heating medium through the controller. The temperature sensors can be respectively arranged in the discharge port of the waste heat receiving water tank, the water outlet of the heating medium of the main heat exchanger, the drain port of the cleaning heater and the cleaning storage water tank.

[0028] The pumping module is set up to ensure the hydraulic pressure in each pipeline, wherein a heat exchange source delivery pump can be set between the waste heat receiving water tank and the pipeline of the main heat exchanger, and a clean water delivery pump can be set 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 electric-controlled sewage valve and sewage delivery pump can be set on the pipeline connected between the sewage outlet of each cleaning tank and the filter. The sewage delivery pump can be a small sewage pump, and the ends of the pipelines connected to the drainage outlets of several cleaning tanks are connected to the inlet end of the same filter; a high-power cleaning liquid delivery pump is set on the pipeline that delivers cleaning liquid from the cleaning storage water tank to the cleaning tank. The delivery pump can pump cleaning liquid to multiple cleaning tanks in the system at the same time, and a flow solenoid valve is set on the water inlet of each cleaning tank, and an upper limit liquid level sensor and a lower limit liquid level sensor are set in each cleaning tank. The flow solenoid valve is programmed and controlled by the controller, and the upper limit liquid level sensor and the lower limit liquid level sensor transmit the sensed liquid level to the controller.

[0029] The flow rate detection module is used to detect the flow rate of water discharged from the main heat exchanger and to detect whether the heat reuse pipeline is blocked, so that the pumping module can be adjusted or maintained in time when the flow rate is too fast or too slow. The flow rate detection module and the temperature sensor module feed back the detected flow rate information and temperature information to the controller, and the controller determines the output status of the control pumping module, the electric control drain valve, the electric control discharge valve, the cleaning heater pump, the switching valve and the auxiliary heater based on the data analysis, and controls the heating power of the cleaning heater. At the same time, the electric control discharge valve is programmed by the controller to control the discharge of the liquid in the waste heat receiving water tank in the system operation.

[0030] The lower limit liquid level sensor in the cleaning tank senses whether the cleaning waste liquid is completely discharged when the cleaning waste liquid is discharged from the cleaning tank. The corresponding flow solenoid valve is in a closed state during the discharge of the cleaning liquid from the cleaning tank. After the cleaning liquid is completely discharged, the corresponding flow solenoid valve is opened and maintained at the maximum opening. After the cleaning liquid reaches the liquid level sensed by the upper limit liquid level sensor, the opening of the flow solenoid valve is adjusted to 10% of the maximum opening, so that the cleaning liquid can be continuously replenished 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 set by the overflow pipe.

[0031] Embodiment 4: This embodiment provides a faucet cleaning waste heat recovery system, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0032] Also includes: A cleaning agent delivery module is provided on the cleaning storage water tank and is used to deliver cleaning agent into the cleaning storage water tank; A stirring module is arranged in the cleaning storage water tank and is used to fully mix the cleaning agent and water to form a cleaning liquid; A concentration detection module, used to detect the concentration of the cleaning agent in the cleaning storage water tank; The heat preservation heater is arranged in the cleaning storage water tank to keep the cleaning liquid warm when the temperature drops.

[0033] In this embodiment, the detergent delivery module is arranged on the cleaning storage water tank, and the detergent is delivered to the cleaning storage water tank through the detergent delivery module, and the cleaning liquid is obtained by mixing the detergent and the heated clean water; and the provided heat preservation heater is used to further heat the water in the cleaning storage water tank when the water temperature is insufficient, so as to ensure that the cleaning liquid in the cleaning storage water tank can reach the temperature to be transported to the cleaning tank. The stirring module includes a stirring shaft and a stirring motor, and the stirring motor is arranged on the top of the cleaning storage water tank, and the stirring module is programmed and controlled by the controller, and the setting of the stirring module can ensure the effect of mixing the detergent and the clean water. The concentration detection module is used to detect the concentration of the detergent in the cleaning liquid, and ensure that the mixed cleaning liquid can achieve a good cleaning effect of removing foreign matter such as oil stains. Among them, the stirring module and the heat preservation heater are programmed and controlled by the controller, and the concentration detection module feeds back the detected data to the controller. When the concentration of the detergent in the cleaning storage water tank decreases, the controller controls the detergent delivery module to deliver the detergent into the cleaning storage water tank, and controls the stirring module to mix the cleaning liquid, and the cleaning liquid delivery pump is in a stopped state during the delivery of the detergent.

[0034] Embodiment 5: 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.

[0035] Control methods include: Step 1: Preset the preset water temperature T of the cleaning liquid in the cleaning storage tank 预设 , i.e. the temperature of the cleaning fluid delivered to the cleaning tank; Step 2: Obtain the current operating data of the system, including the water temperature of the clean water tank, the temperature of the liquid in the exhaust waste heat receiving water tank, the current output power of the cleaning heater, and the output power of the clean water delivery pump; Step 3: According to the water temperature in the clean water tank and the temperature of the waste water discharged from the cleaning tank, the preheating temperature T of the water after passing through the secondary heat exchanger and the main heat exchanger is obtained. 预换 ; Step 4: According to the preheating temperature T of the water after discharge from the main heat exchanger 预换 The preheating temperature T of the water after the cleaning heater is determined by the current output power of the cleaning heater. 预加 ; Step 5: Preheating temperature T 预加 and the preset water temperature T of the cleaning fluid in the cleaning storage tank 预设 For comparison, according to T 预加 With T 预设 Readjust the output power of the cleaning heater according to the size relationship.

[0036] In this embodiment, the control method first pre-sets the temperature of the cleaning liquid in the cleaning storage water tank, then preliminarily determines the water temperature after two heat exchanges based on the water temperature of the heat exchange source of the waste heat receiving water tank and the water temperature of the clean water tank, and then compares the water temperature with the preset water temperature of the cleaning storage water tank, thereby adjusting the output power of the cleaning heater; in this way, while ensuring the water temperature in the cleaning storage water tank, the energy waste caused by overheating of the cleaning heater can be reduced. At the same time, the maximum power and minimum power of the cleaning heater are preset in the controller. When the preheating temperature is far below the maximum power of the cleaning heater, the auxiliary heater is started or the power of the clean water delivery pump is reduced. And before the control method runs step 1, it is assumed that all the cleaning tanks in the system are in working state; if the system does not work and there is no cleaning liquid before the control method runs, the cleaning liquid is first injected into each tank in turn until all the cleaning tanks start to work and then run step 1. Before the system stops running, the cleaning liquid delivery pump is turned off, and the cleaning waste liquid in each cleaning tank is discharged in turn. Steps 1 to 5 are still run during the waste liquid discharge process until the water level in the cleaning storage water tank reaches the upper limit, then the clean water delivery pump is controlled to stop pumping clean water to the cleaning liquid delivery pipeline, and the heat exchange source delivery pump is controlled to stop pumping 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 water tank after passing through the filter. In order to ensure that the heat of the heat exchange medium can be fully utilized in this system, the output power of the heat exchange source delivery pump is constant and is only in the start or stop state.

[0037] Embodiment 6: 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.

[0038] In step five: If T 预加 >T 预设 , then reduce the output power of the cleaning heater; If T 预加 =T 预设 , then maintain the output power of the cleaning heater; If T 预加 <T 预设 , then increase the output power of the cleaning heater.

[0039] In this embodiment, by T 预加 and T 预设 The relationship is determined at the current output power, at T 预加 >T 预设 When , it can be preliminarily determined that the heating temperature of the cleaning heater is greater 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. 预加 <T 预设 When the temperature of the water heated by the cleaning heater is lower than the temperature of the cleaning liquid stored in the cleaning storage tank, the temperature of the cleaning liquid mixed in the cleaning storage tank is not high enough, which affects the cleaning effect to a certain extent. Therefore, the output power of the cleaning heater needs to be increased; the control method can reduce the energy consumption of the cleaning heater as much as possible while ensuring the temperature and effect of the cleaning liquid.

[0040] Embodiment 7: 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.

[0041] Also includes: Step 6: Detect the actual exchange temperature T of the water discharged from the main heat exchanger 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; Step 7, repeat steps 2 to 6; 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.

[0042] 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.

[0043] Embodiment 8: 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.

[0044] The controller has a preset correction temperature coefficient ±T 加△ , T 加△ Can be 2; 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.

[0045] In this embodiment, the correction coefficient T 加△ The temperature difference range of the cleaning liquid that the cleaning storage tank can allow can be ±2. If the temperature is slightly higher or lower than the preset water temperature and has little impact on the cleaning effect, the temperature difference can be ignored, while maintaining the current cleaning heater and clean water delivery pump power; if the temperature difference range is not within the set range, other operations are performed. 加△ It can be adjusted according to the type of cleaning agent and the area of ​​the cleaning tank.

[0046] Embodiment 9: 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.

[0047] 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△ , that is, the heating temperature T 应加 Subtract the heating temperature T 实换 If the value of is a positive number and 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.

[0048] In this embodiment, when the heating 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 heating temperature T 应加 The value of the heating temperature T 应加 Control the temperature within a range suitable for cleaning in the cleaning tank.

[0049] Embodiment 10: 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.

[0050] In step five: If the heating temperature T 应加 Subtract the preset water temperature T 预设 Is negative and the value is greater than -T 加△ , that is, the heating temperature T 应加 Subtract the heating temperature T 实换 If the value is negative and greater than -2, the current power of the cleaning heater and the clean water delivery pump will be maintained; If the heating temperature T 应加 Subtract the preset water temperature T 预设 Is negative and the value is less than -T 加△ But greater than -2*T 加△ , that is, the heating 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.

[0051] If the heating temperature T 应加 Subtract the preset water temperature T 预设 Negative and less than -2*T 加△, that is, the heating 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.

[0052] In this embodiment, the heating temperature T 应加 Lower than the preset water temperature T 预设 The three-zone control is carried out according to the heating temperature T 应加 Lower than the preset water temperature T 预设 The situation of the cleaning heater machine clean water delivery pump is controlled to ensure the heating temperature T 应加 Subtract the preset water temperature T 预设 To ensure that the temperature of the cleaning fluid in the cleaning storage tank is within a controllable range.

[0053] Embodiment 11: 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.

[0054] Step 6 also includes detecting the actual heat temperature T of the water discharged from the cleaning heater. 实热 , heating temperature T 应加 Lower than the preset water temperature T 预设 , the switching valve controls the liquid to pass through the auxiliary branch pipe and starts the auxiliary heater to auxiliary heat the water, and then transport it to the cleaning storage water tank.

[0055] 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 auxiliary heated by the auxiliary heater to ensure that the water will not be lower than the preset water temperature T before entering the cleaning storage tank. 预设 ; And in combination with step 5, the water temperature can be intervened for the second time to avoid the temperature of the cleaning storage water tank from decreasing and affecting the cleaning effect. 实热 When the temperature of the cleaning fluid in the cleaning storage water tank is equal to that of the cleaning storage water tank, the auxiliary heater and the thermal insulation heater are in a stopped heating state.

[0056] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. 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); The clean water tank (8) is used to store water for transmission to the secondary heat exchanger (5) for initial preheating.

2. 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. 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 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 the 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. A control method applicable to the faucet cleaning waste heat recovery system according to claim 4, characterized in that: 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.

6. The control method according to claim 5, characterized in that: 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.

7. The control method according to claim 5, characterized in that: 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.

8. The control method according to claim 7, 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.

9. The control method according to claim 8, 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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