CN216143979U - Heating system for sink - Google Patents

Abstract

The utility model discloses a heating system for a sink, comprising: the water storage unit comprises a first water tank, a second water tank and a third water tank which are sequentially communicated, wherein the first water tank is used for being communicated with a water inlet source, the second water tank is arranged at the downstream of the first water tank, and the third water tank is arranged at the downstream of the second water tank and is used for being communicated with water using equipment; the heat exchange unit comprises first heat exchange equipment and second heat exchange equipment, a first inlet of the first heat exchange equipment is communicated with a water outlet of the first water tank, and a first outlet of the first heat exchange equipment is communicated with a water inlet of the second water tank; the first inlet of the second heat exchange device is communicated with the water outlet of the second water tank, and the first outlet of the second heat exchange device is communicated with the water inlet of the third water tank. The utility model can improve the accuracy of the temperature of the water in the water tank.

Description

Heating system for sink

Technical Field

The utility model relates to the technical field of industry, in particular to a heating system for a water tank.

Background

The water tank is used as household equipment and industrial equipment, the structure of the water tank is continuously innovated and reformed along with the development of the times, the existing water tank is usually an independent water tank, and the water tank has a single function and does not have a heating function generally. Because the water in the water tank needs to be kept in a certain temperature range, a heating assembly is usually arranged at the bottom or on the side of the water tank to enable the bottom or the side of the water tank to generate heat, namely the water temperature in the water tank is kept constant by adopting a heat conduction mode. In the large-capacity water tank, the structure can only carry out local heating, and the temperature of water in the water tank is inaccurate.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims to provide a heating system for a water tank, which aims to solve the problem that the temperature of water in the water tank is inaccurate due to the fact that the existing water tank adopts a local heating mode.

In order to achieve the above object, the present invention provides a heating system for a sink, comprising:

the water storage unit comprises a first water tank, a second water tank and a third water tank which are sequentially communicated, wherein the first water tank is used for being communicated with a water inlet source, the second water tank is arranged at the downstream of the first water tank, and the third water tank is arranged at the downstream of the second water tank and is used for being communicated with water using equipment;

the heat exchange unit comprises first heat exchange equipment and second heat exchange equipment, a first inlet of the first heat exchange equipment is communicated with a water outlet of the first water tank, and a first outlet of the first heat exchange equipment is communicated with a water inlet of the second water tank; the first inlet of the second heat exchange device is communicated with the water outlet of the second water tank, and the first outlet of the second heat exchange device is communicated with the water inlet of the third water tank.

In an embodiment of the present invention, the heat exchange unit further includes: and a first inlet of the third heat exchange device is communicated with a second outlet of the first heat exchange device and a second outlet of the second heat exchange device respectively and is used for receiving high-temperature condensate water generated by the first heat exchange device and the second heat exchange device, a second inlet of the third heat exchange device is communicated with a water outlet of the first water tank, and a first outlet of the third heat exchange device is communicated with a water inlet of the first water tank.

In an embodiment of the present invention, the heating system for a sink further comprises: the temperature detection unit comprises a first temperature sensor, a second temperature sensor and a third temperature sensor, wherein the first temperature sensor is arranged on the first water tank, the second temperature sensor is arranged on the second water tank, and the third temperature sensor is arranged on the third water tank; the steam adjusting unit comprises a first steam adjusting valve and a second steam adjusting valve, the first steam adjusting valve is communicated with the second inlet of the first heat exchange device, and the second steam adjusting valve is communicated with the second inlet of the second heat exchange device; and the temperature control unit is electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor, the first steam regulating valve and the second steam regulating valve and is used for controlling the opening degrees of the first steam regulating valve and the second steam regulating valve according to temperature signals detected by the first temperature sensor, the second temperature sensor and the third temperature sensor.

In an embodiment of the present invention, the heating system for a sink further comprises: the liquid level adjusting unit comprises a first water pump, and the first water pump is arranged on a pipeline communicated between a second inlet of the third heat exchange device and a water outlet of the first water tank; the temperature detection unit further includes: the fourth temperature sensor is arranged on a pipeline communicated between the first outlet of the third heat exchange device and the water inlet of the first water tank; the temperature control unit is also electrically connected with the fourth temperature sensor and the first water pump and is used for controlling the running speed of the first water pump according to the temperature signal detected by the fourth temperature sensor.

In an embodiment of the present invention, the heating system for a sink further comprises: the liquid level detection unit comprises a first liquid level sensor, and the first liquid level sensor is arranged on the first water tank; the liquid level regulating unit further comprises a water inlet valve and a second water pump, the water inlet valve is arranged on a pipeline communicated between the first water tank and the water inlet source, and the second water pump is arranged on a pipeline communicated between a first inlet of the first heat exchange device and a water outlet of the first water tank; and the liquid level control unit is electrically connected with the first liquid level sensor, the water inlet valve and the second water pump and is used for controlling the opening and closing of the water inlet valve and the second water pump according to a liquid level signal detected by the first liquid level sensor.

In an embodiment of the present invention, the liquid level detection unit further includes: the second liquid level sensor is arranged on the second water tank; the liquid level regulating unit also comprises a third water pump which is arranged on a pipeline communicated between the first inlet of the second heat exchange device and the water outlet of the second water tank; the liquid level control unit is also electrically connected with the second liquid level sensor and the third water pump and used for controlling the switch of the third water pump and the second water pump according to a liquid level signal detected by the second liquid level sensor.

In an embodiment of the present invention, the liquid level detection unit further includes: the third liquid level sensor is arranged on the third water tank; the liquid level regulation unit further includes: the fourth water pump is arranged on a pipeline communicated between the second water tank and the third water tank; the liquid level control unit is also electrically connected with the third liquid level sensor and the fourth water pump and is used for controlling the running speed of the fourth water pump according to a liquid level signal detected by the third liquid level sensor.

In the embodiment of the utility model, the temperature control unit is also electrically connected with a third temperature sensor and a third water pump and is used for controlling the switch of the third water pump according to a temperature signal detected by the third temperature sensor; the liquid level control unit is also electrically connected with a third liquid level sensor and a third water pump and is used for controlling the switch of the third water pump according to a liquid level signal detected by the third liquid level sensor.

In an embodiment of the present invention, the heating system for a sink further comprises: the fifth temperature sensor is arranged on a pipeline communicated between the second outlet of the first heat exchange device and the water inlet of the second water tank; and the sixth temperature sensor is arranged on a pipeline communicated between the second outlet of the second heat exchange device and the water inlet of the third water tank.

In an embodiment of the present invention, the heating system for a sink further comprises: and the fifth water pump is arranged on a pipeline communicated between the third water tank and the water using equipment.

Through the technical scheme, the water storage unit is including the first basin that communicates in proper order, second basin and third basin, heat transfer unit includes first indirect heating equipment and second indirect heating equipment, adopt the form of water storage unit and heat transfer unit series one by one, can be at the in-process of carrying out the moisturizing to the basin, adopt first indirect heating equipment to carry out preliminary preheating to the water in the first basin first, and carry to the second basin, thereby heat the water after preheating once more in to the second basin through second indirect heating equipment, carry to the third basin, thereby make the temperature of the water in the third basin satisfy user's desired target temperature. Above-mentioned a heating system for basin adopts the mode of multistage heating, preheats earlier the postheating at the in-process of moisturizing, when having guaranteed the degree of accuracy of the temperature of water in the large capacity basin, has further satisfied the requirement of large capacity basin to the water yield.

Additional features and advantages of embodiments of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the embodiments of the utility model without limiting the embodiments of the utility model. In the drawings:

FIG. 1 schematically illustrates a schematic diagram of a heating system for a sink in one embodiment of the present invention;

FIG. 2 schematically illustrates a block diagram of a heating system for a sink in one embodiment of the present invention;

FIG. 3 schematically illustrates a schematic view of a heating system for a sink in another embodiment of the present invention;

FIG. 4 is a block diagram schematically illustrating a heating system for a sink in accordance with another embodiment of the present invention;

FIG. 5 schematically illustrates a control flow diagram for a heating system for a sink in an embodiment of the present invention.

Description of the reference numerals

10 water storage unit 20 heat exchange unit

102 first basin 104 second basin

106 third water tank 202 first heat exchange equipment

204 second heat exchange device 206 third heat exchange device

30 temperature detection unit 302 first temperature sensor

304 second temperature sensor 306 third temperature sensor

40 vapor conditioning unit 402 first vapor conditioning valve

404 second vapor regulator valve 50 temperature control unit

60 level regulating unit 602 first water pump

308 fourth temperature sensor 70 liquid level detection unit

702 first level sensor 603 inlet valve

604 second Water Pump 80 level control Unit

704 second level sensor 606 third Water Pump

706 third level sensor 608 fourth Water Pump

310 fifth temperature sensor 312 sixth temperature sensor

610 fifth water pump

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the utility model, are given by way of illustration and explanation only, not limitation.

Embodiments of the present invention provide a heating system for a sink. Fig. 1 schematically shows a schematic configuration of a heating system for a sink in an embodiment of the present invention. Fig. 2 schematically shows a block diagram of a heating system for a sink in an embodiment of the present invention. As shown in fig. 1 and 2, in the present embodiment, a heating system for a water tank is provided, which includes a water storage unit 10 and a heat exchange unit 20, wherein the water storage unit 10 includes a first water tank 102, a second water tank 104 and a third water tank 106 which are sequentially communicated, the first water tank 102 is used for communicating with a water inlet source, the second water tank 104 is disposed downstream of the first water tank 102, and the third water tank 106 is disposed downstream of the second water tank 104 and is used for communicating with a water using device.

It is understood that the first tank 102, the second tank 104, and the third tank 106 are water storage devices for storing water from an incoming water source, and may include, but are not limited to, ordinary tanks and tanks that may be heated or insulated. The first tank 102, the second tank 104 and the third tank 106 are connected in series, the first tank 102 is connected to a water inlet source to input water from the water inlet source into the first tank 102, the second tank 104 is disposed downstream of the first tank 102 so that water in the first tank 102 can flow into the second tank 104, the third tank 106 is disposed downstream of the second tank 104 so that water in the second tank 104 can flow into the third tank 106, and the third tank 106 is connected to a water-using device so that water in the third tank 106 can be supplied to the water-using device.

The heat exchange unit 20 comprises a first heat exchange device 202 and a second heat exchange device 204, a first inlet of the first heat exchange device 202 is communicated with a water outlet of the first water tank 102, and a first outlet of the first heat exchange device 202 is communicated with a water inlet of the second water tank 104; the first inlet of the second heat exchange device 204 is communicated with the water outlet of the second water tank 104, and the first outlet of the second heat exchange device 204 is communicated with the water inlet of the third water tank 106.

It is understood that the first heat exchange device 202 and the second heat exchange device 204 are devices for heating water to perform heat exchange, and may include, but are not limited to, a plate heat exchanger, which is a high efficiency heat exchanger formed by stacking a series of metal sheets having a certain corrugated shape, and thin rectangular channels are formed between the various sheets for heat exchange through the sheets. The plate heat exchanger is an ideal device for heat exchange of liquid-liquid and liquid-vapor. The plate heat exchanger is provided with two inlet ends and two outlet ends, wherein the inlet ends can be used for inputting water and/or steam, and the outlet ends can be used for outputting the water and/or steam after heat exchange of the plate heat exchanger.

A first inlet of the first heat exchanging device 202 (e.g., a plate heat exchanger) is communicated with an outlet of the first water tank 102 for heating water output from the first water tank 102, and a first outlet of the first heat exchanging device 202 is communicated with an inlet of the second water tank 104, so as to convey the water heated by the first heat exchanging device 202 in the first water tank 102 to the second water tank 104. A first inlet of the second heat exchanging device 204 (e.g. a plate heat exchanger) is communicated with an outlet of the second water tank 104 for heating water output from the second water tank 104, and a first outlet of the second heat exchanging device 204 is communicated with an inlet of the third water tank 106, so as to convey water heated by the second heat exchanging device 204 in the second water tank 104 to the third water tank 106.

In this embodiment, the water storage unit 10 includes the first basin 102, the second basin 104 and the third basin 106 that communicate in proper order, heat transfer unit includes first indirect heating equipment 202 and second indirect heating equipment 204, adopt the form of water storage unit and heat transfer unit one-to-one series connection, can be at the in-process of carrying out the moisturizing to the basin, adopt first indirect heating equipment 202 to carry out preliminary preheating to the water in the first basin first, and carry to the second basin 104, thereby heat the water after preheating in the second basin 104 once more through second indirect heating equipment 204, carry to the third basin 106, thereby make the temperature of the water in the third basin 106 satisfy user's desired target temperature. Above-mentioned a heating system for basin adopts the mode of multistage heating, preheats earlier the postheating at the in-process of moisturizing, when having guaranteed the degree of accuracy of the temperature of water in the large capacity basin, has further satisfied the requirement of large capacity basin to the water yield.

Fig. 3 schematically shows a schematic view of a heating system for a sink in another embodiment of the present invention. In one embodiment, as shown in fig. 3, the heat exchange unit 20 further comprises: a first inlet of the third heat exchange device 206 is communicated with a second outlet of the first heat exchange device 202 and a second outlet of the second heat exchange device 204, respectively, and is used for receiving high-temperature condensed water generated by the first heat exchange device 202 and the second heat exchange device 204, a second inlet of the third heat exchange device 206 is communicated with a water outlet of the first water tank 102, and a first outlet of the third heat exchange device 206 is communicated with a water inlet of the first water tank 102.

It can be understood that, in the process of heating the water in the first water tank 102 and the second water tank 104 by the first heat exchange device 202 and the second heat exchange device 204, the second outlets of the first heat exchange device 202 and the second heat exchange device 204 discharge redundant high-temperature condensed water, and the first inlet of the third heat exchange device 206 is communicated with the second outlet of the first heat exchange device 202 and the second outlet of the second heat exchange device 204, respectively, and is used for conveying the redundant high-temperature condensed water to the third heat exchange device 206, so that the third heat exchange device 206 recycles the high-temperature condensed water generated by the first heat exchange device 202 and the second heat exchange device 204, and the purpose of saving energy is achieved.

A second inlet of the third heat exchange device 206 is in communication with the water outlet of the first water tank 102 for receiving water in the first water tank 102. The first outlet of the third heat exchanging device 206 is communicated with the water inlet of the first water tank 102, and is used for delivering the water subjected to heat exchange in the first water tank 102 back to the first water tank 102 again, at this time, the water delivered back to the first water tank 102 is water with a higher temperature.

Further, the second outlet of the third heat exchanging device 206 may be configured to discharge the high-temperature condensed water subjected to heat exchanging treatment by the third heat exchanging device 206, where the temperature of the high-temperature condensed water subjected to heat exchanging treatment is lower, such as normal-temperature water or cold water.

Fig. 4 is a block diagram schematically showing a heating system for a sink in another embodiment of the present invention. In one embodiment, as shown in fig. 3 and 4, the heating system for a sink further includes: a temperature detection unit 30 including a first temperature sensor 302, a second temperature sensor 304, and a third temperature sensor 306, the first temperature sensor 302 being disposed on the first water tank 102, the second temperature sensor 304 being disposed on the second water tank 104, and the third temperature sensor 306 being disposed on the third water tank 106; a vapor conditioning unit 40 comprising a first vapor conditioning valve 402 and a second vapor conditioning valve 404, the first vapor conditioning valve 402 being in communication with a second inlet of the first heat exchange means 202 and the second vapor conditioning valve 404 being in communication with a second inlet of the second heat exchange means 204; the temperature control unit 50 is electrically connected to the first temperature sensor 302, the second temperature sensor 304, the third temperature sensor 306, the first vapor regulator valve 402, and the second vapor regulator valve 404, and is configured to control the opening degrees of the first vapor regulator valve 402 and the second vapor regulator valve 404 according to temperature signals detected by the first temperature sensor 302, the second temperature sensor 304, and the third temperature sensor 306.

It will be appreciated that a first temperature sensor 302 is provided on the first tank 102 for measuring the temperature of the water in the first tank 102, a second temperature sensor 304 is provided on the second tank 104 for measuring the temperature of the water in the second tank 104, and a third temperature sensor 306 is provided on the third tank 106 for measuring the temperature of the water in the third tank 106.

The first steam adjusting valve 402 is communicated with the second inlet of the first heat exchange device 202, and the amount of steam entering the first heat exchange device 202 can be controlled by controlling the opening degree of the first steam adjusting valve 402, so as to control the heat exchange process of the first heat exchange device 202, and obtain preheated water. The second steam adjusting valve 404 is communicated with the second inlet of the second heat exchange device 204, and the amount of steam entering the second heat exchange device 204 can be controlled by controlling the opening degree of the second steam adjusting valve 404, so that the heat exchange process of the second heat exchange device 204 is controlled, and the heated water meeting the user desired temperature is obtained.

In the process of supplementing water to the first water tank 102, the first heat exchange device 202 is started to preheat, the air inflow is mainly controlled by the first steam adjusting valve 402 in the preheating process, and the control range of the air inflow is 0% -100%.

The temperature control unit 50 may control the opening degrees of the first and second vapor regulator valves 402 and 404 according to the temperature signals detected by the first, second, and third temperature sensors 302, 304, and 306. Specifically, when the temperature signal detected by the first temperature sensor 302 indicates that the temperature of the water in the first water tank 102 is low, that is, lower than a certain preset lower temperature threshold, the opening degree of the first steam adjusting valve 402 may be increased to increase the heating intensity of the first heat exchanging device 202. When the temperature signal detected by the second temperature sensor 304 indicates that the temperature is low, that is, lower than a certain preset lower temperature threshold, the opening degree of the first steam regulating valve 402 may be increased or the opening degree of the second steam regulating valve 404 may be increased to increase the heating power of the first heat exchange device 202 or the heating power of the second heat exchange device 204.

When the temperature signal detected by the third temperature sensor 306 indicates that the temperature is low, that is, lower than a preset lower temperature threshold, the opening degree of the second vapor regulating valve 404 may be increased to increase the heating power of the second heat exchanging device 204. Further, when the temperature signal detected by the third temperature sensor 306 indicates that the temperature is high, that is, lower than a preset high temperature threshold, the opening degree of the second vapor regulating valve 404 may be decreased to decrease the heating power of the second heat exchanging device 204.

The temperature control unit 50 may include, but is not limited to, a PLC controller, and in particular, the PLC controller may calculate and output an opening value between 0 and 100% to the first steam control valve and/or the second steam control valve through a PID algorithm, so as to control the stability and accuracy of the temperature of the water in the water tank by adjusting the opening of the steam control valve.

In one embodiment, with continued reference to fig. 3 and 4, the heating system for a water tank further includes a liquid level adjusting unit 60 including a first water pump 602, wherein the first water pump 602 is disposed on a pipeline communicating between the second inlet of the third heat exchange device 206 and the water outlet of the first water tank 102; the temperature detection unit 30 further includes: a fourth temperature sensor 308, wherein the fourth temperature sensor 308 is arranged on a pipeline communicated between the first outlet of the third heat exchange device 206 and the water inlet of the first water tank 102; the temperature control unit 50 is also electrically connected to the fourth temperature sensor 308 and the first water pump 602, and is configured to control the operation speed of the first water pump 602 according to the temperature signal detected by the fourth temperature sensor.

It is understood that the first water pump 602 is disposed on the pipeline communicating between the second inlet of the third heat exchanging device 206 and the water outlet of the first water tank 102, and is used for adjusting the water flow rate of the water in the first water tank 102 pumped into the third heat exchanging device 206. The fourth temperature sensor 308 is disposed on a pipeline communicating between the first outlet of the third heat exchanging device 206 and the water inlet of the first water tank 102, and is configured to detect a temperature of the water returning to the first water tank 102 again after heat exchange by the third heat exchanging device 206.

The temperature control unit 30 controls the operation speed of the first water pump 602 according to the temperature signal detected by the fourth temperature sensor 308, and specifically, when the temperature signal detected by the fourth temperature sensor 308 indicates that the temperature is too high, that is, higher than a preset safe temperature threshold (e.g., 90 ℃), it indicates that the first water pump 602 may be in a damaged state at this time and needs to be repaired or replaced. When the temperature signal detected by the fourth temperature sensor 308 indicates a high temperature, that is, a temperature higher than a preset high temperature threshold (for example, 80 ℃), the temperature control unit 30 may output a large operation speed value to the first water pump 602, and control the first water pump 602 to operate at the large operation speed, so as to increase the inflow rate of the third heat exchange device 206 to obtain water with a suitable temperature.

Similarly, when the temperature signal detected by the fourth temperature sensor 308 indicates that the temperature is low, for example, lower than a certain preset lower temperature threshold (for example, 20 ℃), the temperature control unit 30 may output a minimum operation speed value or a preset minimum operation speed value to the first water pump 602, and control the first water pump 602 to operate at the operation speed, so as to reduce the water inflow rate of the third heat exchange device 206 to obtain water with a suitable temperature, wherein the operation of the first water pump 602 at the minimum speed may achieve the effects of waste heat utilization and energy saving. Further, the first water pump 602 may be a circulation pump, the circulation pump is electrically connected to a frequency converter, the frequency converter is configured to control a rotation speed of a motor of the circulation pump to adjust a pressure of the circulation water, and the temperature control unit 30 may output an opening value between 0 and 100% to the frequency converter after calculating by PID, so as to control an operation speed of the first water pump 602 in real time by the frequency converter.

In one embodiment, with continued reference to fig. 3 and 4, the heating system for a sink described above further comprises: a liquid level detection unit 70 including a first liquid level sensor 702, the first liquid level sensor 702 being provided on the first water tank 102; the liquid level adjusting unit 60 further comprises a water inlet valve 603 and a second water pump 604, wherein the water inlet valve 603 is arranged on a pipeline communicated between the first water tank 102 and a water inlet source, and the second water pump 604 is arranged on a pipeline communicated between a first inlet of the first heat exchanging device 202 and a water outlet of the first water tank 102; and the liquid level control unit 80 is electrically connected with the first liquid level sensor 702, the water inlet valve 603 and the second water pump 604 and is used for controlling the opening and closing of the water inlet valve 603 and the second water pump 604 according to a liquid level signal detected by the first liquid level sensor 702.

It is understood that the first fluid level sensor 702 is disposed on the first tank 102 for measuring the fluid level within the first tank 102. The water inlet valve 603 is disposed on a pipeline communicating between the first water tank 102 and a water inlet source, and is used for controlling on/off of the water inlet pipeline of the first water tank 102. The second water pump 604 is configured to pump water in the first water tank 102 into the first heat exchanging device 202, and control on/off of a pipeline between a first inlet of the first heat exchanging device 202 and a water outlet of the first water tank 102.

The liquid level control unit 80 controls the on and off of the water inlet valve 603 and the second water pump 604 according to the liquid level signal detected by the first liquid level sensor 702, and specifically, the liquid level control unit 80 may control the water inlet valve 603 to be opened when the liquid level signal of the first water tank 102 detected by the first liquid level sensor 702 indicates that the liquid level is low or no water, for example, the liquid level is lower than a preset lower threshold value. When the liquid level signal of the first water tank 102 detected by the first liquid level sensor 702 indicates that the liquid level reaches the preset water level threshold, the liquid level control unit 80 may control the water inlet valve 603 to be closed to stop replenishing the first water tank 102.

When the liquid level signal of the first water tank 102 detected by the first liquid level sensor 702 indicates that the liquid level is higher than the minimum protection liquid level, the liquid level control unit 80 may control the second water pump 604 to be turned on to pump the liquid in the first water tank 102 into the first heat exchange device 202. Here, the second water pump 604 may be operated at a constant maximum speed after being turned on or at a preset operation speed. When the liquid level signal of the first water tank 102 detected by the first liquid level sensor 702 indicates that the liquid level reaches the preset water level threshold, the liquid level control unit 80 may control the second water pump 604 to be turned off to stop working.

In one embodiment, with continued reference to fig. 3 and 4, the liquid level detection unit 70 further comprises: a second liquid level sensor 704, the second liquid level sensor 704 being provided on the second water tank 104; the liquid level adjusting unit 60 further comprises a third water pump 606, and the third water pump 606 is arranged on a pipeline communicated between the first inlet of the second heat exchanging device 204 and the water outlet of the second water tank 104; the liquid level control unit 80 is also electrically connected to the second liquid level sensor 704 and the third water pump 606, and is configured to control the on/off of the third water pump 606 and the second water pump 604 according to the liquid level signal detected by the second liquid level sensor 704.

It is understood that the second level sensor 704 is used to detect the level of water within the second tank 104. The third water pump 606 is configured to pump water in the second water tank 104 into the second heat exchanging device 204, and control on/off of a pipeline between the first inlet of the second heat exchanging device 204 and the water outlet of the second water tank 104. The liquid level control unit 80 controls the third water pump 606 and the second water pump 604 to be turned on or off according to the liquid level signal detected by the second liquid level sensor 704, and specifically, when the liquid level signal of the second water tank 104 detected by the second liquid level sensor 704 indicates that the liquid level is low, for example, lower than a preset minimum liquid level, the liquid level control unit 80 may control the second water pump 604 to be turned on so that the second water tank 104 obtains the preheated water from the first water tank 102.

When the liquid level signal of the second water tank 104 detected by the second liquid level sensor 704 indicates that the liquid level reaches the preset water level threshold, the liquid level control unit 80 may control the second water pump 604 to turn off to stop the water delivery from the first water tank 102 to the second water tank 104. When the liquid level signal of the second water tank 104 detected by the second liquid level sensor 704 indicates that the liquid level reaches the lowest protection liquid level threshold, the liquid level control unit 80 may control the third water pump 606 to be turned on to deliver water to the third water tank 106.

In one embodiment, with continued reference to fig. 3 and 4, the liquid level detection unit 70 further comprises: a third liquid level sensor 706, the third liquid level sensor 706 being disposed on the third water tank; the liquid level regulation unit 60 further includes: a fourth water pump 608, the fourth water pump 608 being provided on a pipe communicating between the second water tank 104 and the third water tank 106; the liquid level control unit 80 is also electrically connected to the third liquid level sensor 706 and the fourth water pump 608, and is configured to control the operating speed of the fourth water pump 608 according to the liquid level signal detected by the third liquid level sensor 706.

It will be appreciated that the third level sensor 706 is used to detect the level of water within the third water tank 106. The fourth water pump 608 is used to pump the water in the third water tank 106 into the second water tank 104, so as to maintain the balance between the liquid levels in the third water tank 106 and the second water tank 104, and control the on/off of the pipeline between the third water tank 106 and the second water tank 104. Further, the fourth water pump 608 may be a circulation pump, the circulation pump is electrically connected to a frequency converter, the frequency converter is configured to control a rotation speed of a motor of the circulation pump to adjust a pressure of the circulation water, and the liquid level control unit 80 may output an opening value between 0% and 100% to the frequency converter through PID calculation, so as to control an operation speed of the fourth water pump 608 in real time through the frequency converter.

The liquid level control unit 80 controls the operation speed of the fourth water pump 608 according to the liquid level signal detected by the third liquid level sensor 706, and specifically, when the liquid level signal of the third water tank 106 detected by the third liquid level sensor 706 indicates that the liquid level is higher than the preset liquid level threshold, the liquid level control unit 80 may determine the operation speed of the fourth water pump 608 based on a PID algorithm according to a difference value between the current liquid level signal and the preset liquid level threshold, and control the fourth water pump 608 to operate at the determined operation speed to pump an appropriate amount of water in the third water tank 106 back to the second water tank 104, so as to achieve consistency of the liquid levels between the second water tank 104 and the third water tank 106.

In one embodiment, with continued reference to fig. 3 and 4, the temperature control unit 50 is further electrically connected to the third temperature sensor 306 and the third water pump 606 for controlling the on/off of the third water pump 606 according to the temperature signal detected by the third temperature sensor 306; the liquid level control unit 80 is also electrically connected to the third liquid level sensor 706 and the third water pump 606, and is configured to control the on/off of the third water pump 606 according to a liquid level signal detected by the third liquid level sensor 706.

Specifically, the temperature control unit 50 is electrically connected to the third temperature sensor 306 and the third water pump 606, the temperature control unit 50 may receive the temperature of the water in the third water tank 106 detected by the third temperature sensor 306, and the temperature control unit 50 may control the third water pump 606 to be turned off when the temperature of the water in the third water tank 106 reaches a preset temperature threshold. The liquid level control unit 80 may receive information about the level of water in the third water tank 106 detected by the third liquid level sensor 706, and the liquid level control unit 80 may control the third water pump 606 to be turned off when the level of water in the third water tank 106 reaches a preset liquid level threshold.

Further, the temperature control unit 50 and the liquid level control unit 80 may control the third water pump 606 to be turned off when the temperature of the water in the third water tank 106 reaches a preset temperature threshold and the liquid level of the water reaches a preset liquid level threshold.

In one embodiment, with continued reference to fig. 3, the heating system for a sink described above further comprises: a fifth temperature sensor 310, which is disposed on the pipeline communicating between the second outlet of the first heat exchanging device 202 and the water inlet of the second water tank 104; and a sixth temperature sensor 312, which is disposed on the pipeline communicating between the second outlet of the second heat exchanging device 204 and the water inlet of the third water tank 106.

It can be understood that the fifth temperature sensor 310 is used for detecting the temperature of the water in the pipeline communicated between the second outlet of the first heat exchanging device 202 and the water inlet of the second water tank 104, and the fifth temperature sensor 310 can prevent the pipeline from exploding due to the over-high temperature of the water in the pipeline section because the water temperature heated or preheated by the first heat exchanging device 202 may be higher, so as to protect the pipeline and alarm. Similarly, the sixth temperature sensor 312 is used to detect the temperature of the water in the pipeline communicated between the second outlet of the second heat exchanging device 204 and the water inlet of the third water tank 106, and the sixth temperature sensor 312 is arranged to prevent the pipeline from exploding due to the over-high temperature of the water in the pipeline, so as to protect the pipeline and alarm, because the water temperature heated or preheated by the second heat exchanging device 204 may be higher.

In one embodiment, with continued reference to fig. 3, the heating system for a sink described above further comprises: and a fifth water pump 610 disposed on a pipeline communicating between the third water tank 106 and the water using equipment.

It will be appreciated that the fifth water pump 610 is used to pump the water in the third water tank 106 to the water-using facility. Further, the operation speed of the fifth water pump 610 can be controlled or determined by the level control unit 80 according to the actual water usage of the user or according to the actual water usage required by the process flow. Further, the fifth water pump 610 may be a circulation pump, the circulation pump is electrically connected to the frequency converter, the frequency converter is used to control the motor speed of the circulation pump to adjust the pressure of the circulation water, and the liquid level control unit 80 may output an opening value between 0 and 100% to the frequency converter after PID calculation, thereby controlling the operation speed of the fifth water pump 610 in real time through the frequency converter.

In one embodiment, the first water pump 602, the second water pump 604, the third water pump 606, the fourth water pump 608 and the fifth water pump 610 may include, but are not limited to, a common water pump, such as a centrifugal pump, and may also be a variable frequency pump or a circulating pump, and the variable frequency drive receives a control command from the temperature control unit 50 or the liquid level control unit 80 to control the operation of the corresponding water pump.

In one embodiment, the temperature control unit 50 and the liquid level control unit 80 can be integrated on the same controller or processor, such as a PLC controller, wherein the PLC controller can continuously read the liquid level value or temperature value of each water tank and compare and calculate the read value with the set value in real time. Specifically, when the actual temperature and the liquid level value read by the PLC are larger than the set value, the PLC outputs an opening degree of 0-100% to each steam regulating valve and each frequency converter after PID calculation, the stability of the temperature and the liquid level is controlled through the opening degree of the steam regulating valve and the frequency of the frequency converter, the PLC continuously reads the actual liquid level and the temperature value and compares the actual liquid level and the temperature value with the set value, and the PLC continuously calculates and outputs related quantities to the regulating valve and the frequency converter, so that the operation speed of the valve and the pump can be controlled in real time, and the aim of controlling the temperature and the liquid level is fulfilled.

With respect to the specific control process, the control process described above may provide hot water for dissolution of the ternary precursor raw material. Wherein, a pneumatic adjusting valve and a frequency converter can be used, and PID is adopted for adjusting and controlling. The system belongs to a PLC process control system, and takes a PLC as a controller. The control rule is realized by software. The control rule is changed by only changing the corresponding program and the set parameters.

The method utilizes the proportion link of the analog PID regulator, and the correction link of the analog PID regulator has three functions. And (3) proportional links: in time, proportionally reflects the deviation signal e (t) of the control system, and once the deviation is generated, the regulator immediately generates a control action for reducing the deviation. Therefore, the opening degree of the proportional control valve is continuously adjusted, the running speed of the pneumatic diaphragm pump is controlled, and the aim of controlling the liquid level is fulfilled.

The utility model provides a heating system for basin, through at first preheating through first indirect heating equipment 202 in the in-process of carrying out the moisturizing to first basin 102, the rear end carries out automatic cycle heating with second basin 104 and third basin 106, the comdenstion water in the heating process utilizes third indirect heating equipment 206 cyclic utilization once more, for example can write logic control program through Siemens 1500PLC, realize constant liquid level and constant temperature and adjust, thereby reach the production technology requirement, guarantee hydrothermal supply.

In the water replenishing process, the medium (water) is preheated by using the first heat exchange equipment 202 (for example, a plate heat exchanger), the heating temperature of the medium in the tank body is controlled by using the automatic adjusting device (the temperature control unit 50) after the water replenishing is finished, and the generated high-temperature condensed water is recycled by using the third heat exchange equipment 206, so that the purposes of controlling the constant temperature and the constant liquid level and saving energy are achieved.

The heating system for the water tank in the embodiment performs PID proportion regulation control on the pump and a steam regulating valve of the plate heat exchanger by matching with a liquid level detection signal and a temperature detection signal through the plate heat exchanger, the frequency converter, the steam valve and the pump, PID control is performed on the steam regulating valve and the pump by adopting a Siemens 1500PLC, a liquid value and a temperature set value are set according to actual conditions, the system can control the opening degree of the steam valve according to the set liquid level and temperature, the frequency of the frequency converter and the opening degree of the steam valve determine the heating speed, so that the temperature in the heating tank is stably maintained at a certain height, the pump is controlled by the frequency converter in the heating process of the two tanks, constant liquid level control between the two tanks is realized, meanwhile, high-temperature condensate water is subjected to circulating preheating by detecting the temperature of the condensate water in real time through the temperature sensor, the risk of manual operation is reduced, and the labor intensity of personnel is reduced, the product quality is stabilized.

FIG. 5 schematically illustrates a control flow diagram for a heating system for a sink in an embodiment of the present invention. As shown in fig. 5, the control flow description may be as follows:

1. the system is powered on and enters the system, and the system performs self-checking on the execution equipment;

2.1# heat preservation tank water supplement control, namely monitoring the liquid level of the 1# tank body in real time through a liquid level meter, setting the liquid level and performing water supplement control;

3.2# heat preservation tank water replenishing control, namely monitoring the liquid level of the 2# tank body in real time through a liquid level meter, setting the liquid level, performing water replenishing control, simultaneously preheating water by adopting a plate heat exchanger in the water replenishing process, controlling the liquid level of the 1# heat preservation tank and the liquid level of the 2# heat preservation tank in an interlocking manner, and stopping water replenishing according to the low liquid level of the 1# heat preservation tank and the high liquid level of the 2# heat preservation tank;

4.3# heat preservation tank water replenishing control, namely monitoring the liquid level of the 3# tank body in real time through a liquid level meter, setting the liquid level, performing water replenishing control, heating water by adopting a plate heat exchanger in the water replenishing process, controlling the liquid level of the 2# heat preservation tank and the liquid level of the 3# heat preservation tank in an interlocking manner, and stopping water replenishing at the low liquid level of the 2# heat preservation tank and the high liquid level of the 3# heat preservation tank;

the heating control of the No. 5.3 heat preservation tank adopts a temperature sensor to compare the current temperature with the set temperature in real time, and adopts PID control to a pneumatic regulating valve and a variable frequency balance heating pump so as to ensure the stability of the temperature and the balance of the liquid level;

6. waste heat recovery control, high temperature comdenstion water passes through plate heat exchanger, frequency conversion circulating pump, temperature sensor, carries out PID regulation through PLC to the converter, controls the frequency conversion circulating pump, controls discharge, ensures that high temperature condensation waste heat obtains make full use of, and reaches energy-conserving purpose.

Namely, the working principle of water supplement and preheating is that the current value is detected in real time through a liquid level meter and a temperature sensor of the tank body, the current value is compared with the set value of the system in real time, the water storage capacity and the temperature of the tank body are guaranteed, a steam valve is opened in the water supplement process to realize the preheating of water, and therefore the preheating process during water supplement needs to be controlled well if the rear-section heating stability needs to be controlled well.

In the heating process, the liquid levels and the temperatures of the second water tank 104 and the third water tank 106 are controlled in a balanced manner, repeated tests are carried out, the temperature control adopts a pneumatic steam regulating valve to control the steam quantity of the plate heat exchanger, and according to signals of a temperature sensor, PLC is adopted to carry out PID control to keep the temperature stable in a certain interval; the liquid levels of the two tanks adopt a frequency converter and a variable frequency pump, and the PLC is adopted to carry out PID control according to the signals of the liquid level sensors, so that the liquid levels of the two tanks are kept stable in a certain interval.

Regarding the waste heat recycling, because the high-temperature condensate water generated in the heating process passes through the first water tank 102, the first heat exchange device 202, the frequency converter and the circulating pump, a temperature deviation value is set according to the temperature signals of the temperature sensors, the PLC is adopted for PID control, if the temperature of the high-temperature condensate water is higher than the set temperature deviation value, the frequency of the frequency converter is increased to accelerate the circulation, and if the temperature of the high-temperature condensate water is lower than the set temperature deviation value, the minimum frequency is limited, and the method of setting the minimum frequency in the PID is adopted for realizing the purpose.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited thereto. Within the scope of the technical idea of the present application, numerous simple modifications can be made to the technical solution of the present application, including combinations of the specific technical features in any suitable way, and in order to avoid unnecessary repetition, various possible combinations will not be further described herein. These simple modifications and combinations should also be considered as disclosed in the present application, and all fall within the scope of protection of the present application.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present application, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. A heating system for a sink, comprising:

the water storage unit comprises a first water tank, a second water tank and a third water tank which are sequentially communicated, wherein the first water tank is used for being communicated with a water inlet source, the second water tank is arranged at the downstream of the first water tank, and the third water tank is arranged at the downstream of the second water tank and is used for being communicated with water using equipment;

the heat exchange unit comprises first heat exchange equipment and second heat exchange equipment, a first inlet of the first heat exchange equipment is communicated with a water outlet of the first water tank, and a first outlet of the first heat exchange equipment is communicated with a water inlet of the second water tank; and a first inlet of the second heat exchange device is communicated with a water outlet of the second water tank, and a first outlet of the second heat exchange device is communicated with a water inlet of the third water tank.

2. The heating system for a sink of claim 1, wherein the heat exchange unit further comprises: and a first inlet of the third heat exchange device is communicated with a second outlet of the first heat exchange device and a second outlet of the second heat exchange device respectively and is used for receiving high-temperature condensate water generated by the first heat exchange device and the second heat exchange device, a second inlet of the third heat exchange device is communicated with a water outlet of the first water tank, and a first outlet of the third heat exchange device is communicated with a water inlet of the first water tank.

3. The heating system for a sink of claim 2, further comprising:

the temperature detection unit comprises a first temperature sensor, a second temperature sensor and a third temperature sensor, wherein the first temperature sensor is arranged on the first water tank, the second temperature sensor is arranged on the second water tank, and the third temperature sensor is arranged on the third water tank;

a vapor conditioning unit comprising a first vapor conditioning valve in communication with the second inlet of the first heat exchange unit and a second vapor conditioning valve in communication with the second inlet of the second heat exchange unit;

and the temperature control unit is electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor, the first steam regulating valve and the second steam regulating valve and is used for controlling the opening degrees of the first steam regulating valve and the second steam regulating valve according to temperature signals detected by the first temperature sensor, the second temperature sensor and the third temperature sensor.

4. The heating system for a sink of claim 3, further comprising:

the liquid level adjusting unit comprises a first water pump, and the first water pump is arranged on a pipeline communicated between a second inlet of the third heat exchange device and a water outlet of the first water tank;

the temperature detection unit further includes: the fourth temperature sensor is arranged on a pipeline communicated between the first outlet of the third heat exchange device and the water inlet of the first water tank;

the temperature control unit is also electrically connected with the fourth temperature sensor and the first water pump and is used for controlling the running speed of the first water pump according to the temperature signal detected by the fourth temperature sensor.

5. The heating system for a sink of claim 4, further comprising:

the liquid level detection unit comprises a first liquid level sensor, and the first liquid level sensor is arranged on the first water tank;

the liquid level adjusting unit further comprises a water inlet valve and a second water pump, the water inlet valve is arranged on a pipeline communicated between the first water tank and the water inlet source, and the second water pump is arranged on a pipeline communicated between a first inlet of the first heat exchange device and a water outlet of the first water tank;

and the liquid level control unit is electrically connected with the first liquid level sensor, the water inlet valve and the second water pump and is used for controlling the opening and closing of the water inlet valve and the second water pump according to a liquid level signal detected by the first liquid level sensor.

6. The heating system for a sink of claim 5, wherein the level detection unit further comprises: a second liquid level sensor disposed on the second tank;

the liquid level adjusting unit further comprises a third water pump, and the third water pump is arranged on a pipeline communicated between the first inlet of the second heat exchange device and the water outlet of the second water tank;

the liquid level control unit is also electrically connected with the second liquid level sensor and the third water pump and used for controlling the switch of the third water pump and the second water pump according to a liquid level signal detected by the second liquid level sensor.

7. The heating system for a sink of claim 6, wherein the level detection unit further comprises: a third liquid level sensor disposed on the third water tank;

the liquid level adjusting unit further includes: the fourth water pump is arranged on a pipeline communicated between the second water tank and the third water tank;

the liquid level control unit is also electrically connected with the third liquid level sensor and the fourth water pump and is used for controlling the running speed of the fourth water pump according to the liquid level signal detected by the third liquid level sensor.

8. The heating system for a sink according to claim 7, wherein the temperature control unit is further electrically connected to the third temperature sensor and the third water pump for controlling a switch of the third water pump according to a temperature signal detected by the third temperature sensor;

the liquid level control unit is also electrically connected with the third liquid level sensor and the third water pump and is used for controlling the switch of the third water pump according to the liquid level signal detected by the third liquid level sensor.

9. The heating system for a sink of claim 1, further comprising:

the fifth temperature sensor is arranged on a pipeline communicated between the second outlet of the first heat exchange device and the water inlet of the second water tank;

and the sixth temperature sensor is arranged on a pipeline communicated between the second outlet of the second heat exchange device and the water inlet of the third water tank.

10. The heating system for a sink of claim 1, further comprising:

and the fifth water pump is arranged on a pipeline communicated between the third water tank and the water using equipment.

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