Double-pump double-temperature heat recovery structure and control method thereof

Abstract

The invention belongs to the technical field of laser water chiller equipment, and particularly relates to a double-pump double-temperature heat recovery structure and a control method thereof. The double-pump double-temperature heat recovery structure comprises a special-shaped water tank, a normal-temperature water pump, a low-temperature water pump, a radiator and a first electromagnetic valve; the special-shaped water tank is divided into a normal-temperature water tank and a low- The tops of the normal-temperature water tank and the low-temperature water tank communicate; the control method comprises the following steps that the low-temperature water temperature and the normal-temperature water temperature are monitored; and the control flow is circularly executed according to the detection result. The double-pump double-temperature heat recovery structure is convenient to achieve, the pipeline is simple and efficient, high-precision and stable sight normal-temperature water control can be achieved in cooperation with a corresponding control method, normal-temperature water preparation is achieved by recovering heat of an external laser head, the heating power of the system can be effectively reduced, the total power of the system can be effectively reduced, and the starting frequency of the heating system can be effectively reduced. And furthermore, the requirement of cold water on designed refrigerating capacity is reduced, the use and maintenance cost of equipment is reduced, and energy conservation, emission reduction and energy recycling are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of laser chiller equipment, and in particular relates to a dual-pump dual-temperature heat recovery structure and a control method thereof. Background Art

[0002] In the laser chiller industry, conventional models basically use single-pump dual-temperature water outlet technology, a low-temperature water tank, and a water pump to output low-temperature water and normal temperature water respectively. The normal temperature water pipeline is obtained by diverting the low-temperature water pipeline through a tee; the normal temperature water is heated by the low-temperature water through an electric heating tube and then output to the outside. The normal temperature water temperature is a fixed value, and the heat output by the electric heating tube eventually returns to the low-temperature water tank, reducing the refrigeration capacity of the entire system. Summary of the invention

[0003] The purpose of the present invention is to provide an improved dual-pump dual-temperature heat recovery structure, which realizes normal temperature water tank heating by recovering the heat of the laser head, reduces the normal temperature heating start-up frequency, and then increases the system cooling capacity, avoids the mutual cancellation of cooling and heating, and improves the system cooling performance and efficiency.

[0004] To achieve the above purpose, the present invention adopts the following technical solution.

[0005] A dual-pump dual-temperature heat recovery structure, comprising a special-shaped water tank 1, a normal temperature water pump S2, a low temperature water pump S1, a radiator R1, and a first solenoid valve K1;

[0006] The middle of the special-shaped water tank 1 is provided with a heat-insulating portion of a raised portion, and the heat-insulating portion divides the special-shaped water tank 1 into a normal temperature water tank C2 and a low temperature water tank C1; the tops of the normal temperature water tank C2 and the low temperature water tank C1 are connected to each other;

[0007] The bottom of the normal temperature water tank C2 is connected to the normal temperature water supply port T3 of the external device through the normal temperature water pump S2 and the normal temperature water supply pipe L1, and the normal temperature return port T4 of the external device is connected to the top of the normal temperature water tank C2 through the normal temperature return pipe L2;

[0008] The bottom of the low-temperature water tank C1 is connected to the low-temperature water supply port T1 of the external device through the low-temperature water pump S1 and the low-temperature water supply pipe L4. The low-temperature water return port T2 of the external device is connected to the top of the low-temperature water tank C1 through the radiator R1 and the low-temperature water return pipe L3;

[0009] The low-temperature water supply pipe L4 is connected to a low-temperature water supply pipe L5 which is connected to the normal temperature water tank C2 via a first solenoid valve K1;

[0010] It also includes a normal temperature heater disposed in the normal temperature water tank C2, and a low temperature heater disposed in the low temperature water tank C1;

[0011] The cold water supply flow rate of the low temperature water supply pipe L2 Unit: L / min;

[0012] Where Q2 refers to the return water flow rate of the normal temperature return water pipe L2, unit L / min; T4 refers to the return water temperature of the normal temperature return water pipe L2, unit ℃; T3 refers to the water supply temperature of the normal temperature supply water pipe L1, unit ℃; T1 refers to the water supply temperature of the low temperature supply water pipe L4, unit ℃;

[0013] The heating assembly includes a normal temperature heater respectively arranged in the normal temperature water tank C2 and a low temperature heater respectively arranged in the low temperature water tank C1.

[0014] A further improvement or preferred embodiment of the aforementioned dual-pump dual-temperature heat recovery structure, wherein the volume of the normal temperature water tank C2 is Unit L;

[0015] Where D is the inner diameter of the normal temperature water supply pipe L1, in meters;

[0016] Where L is the sum of the lengths of the normal temperature water supply pipe L1 and the normal temperature return pipe L2, in meters.

[0017] The present application also provides a control method for a dual-pump dual-temperature heat recovery structure, comprising the following steps:

[0018] Start the dual-pump dual-temperature heat recovery structure with the external equipment, monitor the low-temperature water temperature T1 of the low-temperature water tank and the normal-temperature water temperature T3 of the normal-temperature water tank; and cyclically execute the following steps according to the detection results:

[0019] A. If the low-temperature water temperature T1 is lower than the preset low-temperature water temperature T1′, the low-temperature heater and the normal temperature heater are started, and the first solenoid valve K1 is opened at the same time, until the low-temperature water temperature T1 is not lower than the preset low-temperature water temperature T1′ and the opening time of the first solenoid valve K1 is not less than t0, t0 is the fixed opening period of the solenoid valve, and then the first solenoid K1 and the low-temperature heater are closed. When the normal temperature water temperature T3 is monitored to exceed T1′+T Δ , then turn off the normal temperature heater, where T Δ is the normal temperature difference;

[0020] B. If the low-temperature water temperature T1 exceeds the preset low-temperature water temperature T1′, the first solenoid valve K1 is opened. After the opening time reaches t0, the normal temperature water temperature T3 is detected. If the normal temperature water temperature T3 ≥ T1′ + T Δ +T Δ ', then continue to open the first solenoid valve K1 until T3<T1'+T Δ -T Δ ', then close the first solenoid valve K1, where T Δ ' is the temperature difference loaded on the solenoid valve.

[0021] A further improvement or preferred implementation of the control method of the aforementioned dual-pump dual-temperature heat recovery structure, T1′=20~25℃; TΔ =8~10℃; T Δ ′=1~2.5℃; t0=60~110s.

[0022] A further improvement or preferred implementation of the control method of the aforementioned dual-pump dual-temperature heat recovery structure, T1′=22.5℃; T Δ =10℃; T Δ ′=1.5℃;t0=90s。

[0023] Its beneficial effects are:

[0024] The dual-pump dual-temperature heat recovery structure of the present application is easy to implement, the pipeline is simple and efficient, and with the corresponding control method, it can achieve high-precision and stable line-of-sight normal temperature water control, and realize normal temperature water preparation by recovering the heat of the external laser head, which can effectively reduce the system heating power, reduce the total system power, and reduce the starting frequency of the heating system, thereby reducing the cold water design cooling capacity requirements, reducing the equipment use and maintenance costs, and achieving energy conservation and emission reduction, and energy recovery and reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the front view of the dual-pump dual-temperature heat recovery structure;

[0026] Figure 2 This is the front view of the dual-pump dual-temperature heat recovery structure;

[0027] Figure 3 This is a circuit diagram of a dual-pump dual-temperature heat recovery structure.

[0028] Figure 4 It is a circuit diagram of a dual-pump dual-temperature heat recovery control method;

[0029] The reference numerals include:

[0030] Special-shaped water tank 1, normal temperature water pump S2, low temperature water pump S1, radiator R1 first solenoid valve K1. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with specific embodiments.

[0032] The dual-pump dual-temperature heat recovery structure of the present invention is mainly used to provide a chiller structure with a simpler, lighter structure, more energy-saving and environmentally friendly. It can effectively recover the heat of the laser during operation and use it to prepare normal temperature water, thereby reducing the power consumption of the chiller's normal temperature heating system, thereby reducing the overall energy consumption of the system, while reducing the system's designed refrigeration capacity requirements and reducing the equipment production and use costs.

[0033] like Figure 1 , Figure 2As shown, the main structure of the dual-pump dual-temperature heat recovery structure of the present application includes a special-shaped water tank 1, a normal temperature water pump S2, a low temperature water pump S1, a radiator R1, and a first solenoid valve K1;

[0034] A heat-insulating portion with a raised part is provided in the middle of the special-shaped water tank 1, and the heat-insulating portion divides the special-shaped water tank 1 into a normal temperature water tank C2 and a low temperature water tank C1; the tops of the normal temperature water tank C2 and the low temperature water tank C1 are connected to each other;

[0035] The bottom of the normal temperature water tank C2 is connected to the normal temperature water supply port T3 of the external device through the normal temperature water pump S2 and the normal temperature water supply pipe L1, and the normal temperature return port T4 of the external device is connected to the top of the normal temperature water tank C2 through the normal temperature return pipe L2;

[0036] The bottom of the low-temperature water tank C1 is connected to the low-temperature water supply port T1 of the external device through the low-temperature water pump S1 and the low-temperature water supply pipe L4. The low-temperature water return port T2 of the external device is connected to the top of the low-temperature water tank C1 through the radiator R1 and the low-temperature water return pipe L3;

[0037] The low-temperature water supply pipe L4 is connected to a low-temperature water supply pipe L5 which is connected to the normal temperature water tank C2 via the first solenoid valve K1;

[0038] It also includes a normal temperature heater disposed in the normal temperature water tank C2, and a low temperature heater disposed in the low temperature water tank C1;

[0039] The cold water supply flow rate of the low temperature water supply pipe L2 Unit: L / min;

[0040] Among them, Q2 refers to the return water flow rate of the normal temperature return water pipe L2, unit L / min; T4 refers to the return water temperature of the normal temperature return water pipe L2, unit ℃; T3 refers to the water supply temperature of the normal temperature supply water pipe L1, unit ℃; T1 refers to the water supply temperature of the low temperature supply water pipe L4, unit ℃.

[0041] A further improvement or preferred embodiment of the aforementioned dual-pump dual-temperature heat recovery structure, wherein the volume of the normal temperature water tank C2 is Unit L;

[0042] Where D is the inner diameter of the normal temperature water supply pipe L1, in meters;

[0043] Where L is the sum of the lengths of the normal temperature water supply pipe L1 and the normal temperature return pipe L2, in meters.

[0044] The present application also provides a control method for a dual-pump dual-temperature heat recovery structure, comprising the following steps:

[0045] Start the dual-pump dual-temperature heat recovery structure with the external equipment, monitor the low-temperature water temperature T1 of the low-temperature water tank and the normal-temperature water temperature T3 of the normal-temperature water tank; and cyclically execute the following steps according to the detection results:

[0046] A. If the low-temperature water temperature T1 is lower than the preset low-temperature water temperature T1′, the low-temperature heater and the normal temperature heater are started, and the first solenoid valve K1 is opened at the same time, until the low-temperature water temperature T1 is not lower than the preset low-temperature water temperature T1′ and the opening time of the first solenoid valve K1 is not less than t0, t0 is the fixed opening period of the solenoid valve, and then the first solenoid K1 and the low-temperature heater are closed. When the normal temperature water temperature T3 is monitored to exceed T1′+T Δ , then turn off the normal temperature heater, where T Δ is the normal temperature difference;

[0047] B. If the low-temperature water temperature T1 exceeds the preset low-temperature water temperature T1′, the first solenoid valve K1 is opened. After the opening time reaches t0, the normal temperature water temperature T3 is detected. If the normal temperature water temperature T3 ≥ T1′ + T Δ +T Δ ', then continue to open the first solenoid valve K1 until T3<T1'+T Δ -T Δ ', then close the first solenoid valve K1, where T Δ ' is the temperature difference loaded on the solenoid valve.

[0048] Based on the actual working temperature requirements of the laser equipment, as a preferred implementation, the temperature control range is generally: T1′=20~25℃; T Δ =8~10℃; T Δ ′=1~2.5℃; t0=60~110s.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A dual-pump dual-temperature heat recovery structure, characterized in that: It comprises a special-shaped water tank (1), a normal temperature water pump (S2), a low temperature water pump (S1), a radiator (R1), a first solenoid valve (K1), and a heating component; A heat-insulating portion with a raised part is provided in the middle of the special-shaped water tank (1), and the heat-insulating portion divides the special-shaped water tank (1) into a normal temperature water tank (C2) and a low temperature water tank (C1); the tops of the normal temperature water tank (C2) and the low temperature water tank (C1) are connected to each other; The bottom of the normal temperature water tank (C2) is connected to the normal temperature water supply port (T3) of the external device through the normal temperature water pump (S2) and the normal temperature water supply pipe (L1), and the normal temperature water return port (T4) of the external device is connected to the top of the normal temperature water tank (C2) through the normal temperature water return pipe (L2); The bottom of the low-temperature water tank (C1) is connected to the low-temperature water supply port (T1) of the external device through the low-temperature water pump (S1) and the low-temperature water supply pipe (L4), and the low-temperature water return port (T2) of the external device is connected to the top of the low-temperature water tank (C1) through the low-temperature water return pipe (L3) via the radiator (R1); The low-temperature water supply pipe (L4) is connected to a low-temperature water replenishment pipe (L5) connected to a normal-temperature water tank (C2) via a first solenoid valve (K1); It also includes a normal temperature heater disposed in the normal temperature water tank (C2), and a low temperature heater disposed in the low temperature water tank (C1); The cold water supply flow rate of the low temperature water supply pipe (L2) Unit: L / min; Where Q2 refers to the return water flow rate of the normal temperature return water pipe (L2), unit L / min; T4 refers to the return water temperature of the normal temperature return water pipe (L2), unit ℃; T3 refers to the supply water temperature of the normal temperature supply water pipe (L1), unit ℃; T1 refers to the supply water temperature of the low temperature supply water pipe (L4), unit ℃; The heating assembly comprises a normal temperature heater respectively arranged in the normal temperature water tank (C2) and a low temperature heater arranged in the low temperature water tank (C1).

2. The dual-pump dual-temperature heat recovery structure according to claim 1 is characterized in that: The volume of the normal temperature water tank (C2) Unit L; Where D is the inner diameter of the normal temperature water supply pipe (L1), in meters; Where L is the sum of the lengths of the normal temperature water supply pipe (L1) and the normal temperature return pipe (L2), in meters.

3. A control method for the dual-pump dual-temperature heat recovery structure according to claim 1, characterized in that: The steps include: Start the dual-pump dual-temperature heat recovery structure with the external equipment, monitor the low-temperature water temperature T1 of the low-temperature water tank and the normal-temperature water temperature T3 of the normal-temperature water tank; and cyclically execute the following steps according to the detection results: A. If the low-temperature water temperature T1 is lower than the preset low-temperature water temperature T1′, the low-temperature heater and the normal temperature heater are started, and the first solenoid valve (K1) is opened at the same time until the low-temperature water temperature T1 is not lower than the preset low-temperature water temperature T1′ and the opening time of the first solenoid valve (K1) is not less than t0, t0 is the fixed opening period of the solenoid valve, and then the first solenoid valve (K1) and the low-temperature heater are closed. When the normal temperature water temperature T3 is detected to exceed T1′+T Δ , then turn off the normal temperature heater, where T Δ is the normal temperature difference; B. If the low-temperature water temperature T1 exceeds the preset low-temperature water temperature T1′, the first solenoid valve (K1) is opened. After the opening time reaches t0, the normal temperature water temperature T3 is detected. If the normal temperature water temperature T3 ≥ T1′ + T Δ +T Δ ', then continue to open the first solenoid valve (K1) until T3<T1'+T Δ -T Δ ', then close the first solenoid valve (K1), where T Δ ' is the temperature difference loaded on the solenoid valve.

4. The control method of the dual-pump dual-temperature heat recovery structure according to claim 3 is characterized in that: T1′=20~25℃;T Δ =8~10℃;T Δ ′=1~2.5℃;t0=60~110s。 5. The control method of the dual-pump dual-temperature heat recovery structure according to claim 3 is characterized in that: T1′=22.5℃;T Δ =10℃;T Δ ′=1.5℃;t0=90s。

Images