Constant-temperature heat source supply system

Abstract

The invention discloses a constant-temperature heat source supply system, which belongs to the technical field of constant-temperature control and comprises a compressor, a condenser, an electromagnetic valve, a thermostatic expansion valve, a temperature sensor, a heating rod, an evaporator, a water pump, a main water tank, an auxiliary water tank, a user side, a controller and a pipeline. The main water tank is interfered by external users to generate temperature fluctuation, evaporators, heating rods and temperature sensors are installed in the main water tank and the auxiliary water tank, and the controller is connected with the heating rods, the compressor, the temperature sensors, the water pump and the electromagnetic valve through wires. The user load change is predicted by monitoring the temperature fluctuation of the main water tank, the high-temperature heat source and the low-temperature heat source are prepared in advance, and the high-temperature heat source or the low-temperature heat source prepared in advance is input into the main water tank in equal proportion according to the load change trend, so that the regulation delay time is shortened, and the temperature fluctuation amplitude of the main water tank in the regulation process is reduced; and high-precision control of the main water tank is realized.

Description

Technical Field

[0001] This invention relates to the field of constant temperature control technology, and in particular to a constant temperature heat source supply system. Background Technology

[0002] In fields such as medical, chemical, and precision manufacturing, there is a demand for high-precision constant-temperature heat sources. However, under disturbances, these sources are prone to problems such as large temperature fluctuations, slow recovery speeds, and low control precision, making it difficult to maintain a high-precision constant-temperature heat source supply and meet user needs.

[0003] In existing technologies, common constant temperature control methods include PID control and variable frequency control. Although PID control can improve control accuracy to some extent, it is difficult to avoid problems such as water temperature exceeding the required range and delayed response when users make large flow or rapidly changing water demands. In addition, the common single-tank structure is prone to uneven temperature distribution of the supplied heat source during water replenishment or use.

[0004] Some systems use multi-stage water tanks or auxiliary heating devices to improve the stability of the heat source, but their structure is complex, the control logic is cumbersome, and the lack of effective coordination between the water tanks leads to high system energy consumption, high cost, and difficult maintenance.

[0005] Therefore, the constant-temperature heat source supply system proposed in this invention has a simple structure and clear control logic. By monitoring the temperature change of the main water tank in real time and predicting the rate of change of the heat load in the main water tank, the heat source in the auxiliary water tank is adjusted proportionally according to the rate and injected into the main water tank to achieve a constant-temperature heat source supply, eliminating the lag in heat source temperature compensation. Summary of the Invention

[0006] The main technical problem solved by this invention is to propose a constant temperature heat source supply system, which achieves rapid and accurate constant temperature heat source supply through the comprehensive adjustment of the heat source delivered by the auxiliary water tank and the temperature control device inside the main water tank, thereby meeting the user's high-precision constant temperature heat source requirements.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A constant temperature heat source supply system is provided, characterized in that it includes a compressor (1), a condenser (2), solenoid valves (3-1, 3-2, 3-3), a thermal expansion valve (4-1, 4-2, 4-3), a temperature sensor (5-1, 5-2, 5-3), heating rods (6-1, 6-2, 6-3), an evaporator (7-1, 7-2, 7-3), a water pump (8-1, 8-2, 8-3), and a main water supply system. The main water tank (9), auxiliary water tanks (10-1, 10-2), user terminal (11), controller (12), and pipelines (13, 14, 15) are connected in sequence; the main water tank (9), water pump (8-3), and user terminal (11) are connected in sequence; the auxiliary water tank (10-1), water pump (8-1), and main water tank (9) are connected in sequence; the auxiliary water tank (10-2), water pump (8-2), and main water tank (9) are connected in sequence; the controller (12), compressor (1), solenoid valve (3-1, ... 3-2, 3-3), temperature sensors (5-1, 5-2, 5-3), heating rods (6-1, 6-2, 6-3), and water pumps (8-1, 8-2) are connected by wires; the temperature sensor (5-1), heating rod (6-1), and condenser (7-1) are located inside the main water tank (9); the temperature sensor (5-2), heating rod (6-2), and condenser (7-2) are located inside the auxiliary water tank (10-1); the temperature sensor (5-3), heating rod... (6-3) and condenser (7-3) are located inside auxiliary water tank (10-2); the output end of compressor (1) is connected to the input end of condenser (2); three pipes (13, 14, 15) are formed on the pipe at the output end of condenser (2); the input ends of pipes (13, 14, 15) are connected to main water tank (9), auxiliary water tank (10-1), and auxiliary water tank (10-2) respectively; the three pipes (13, 14, 15) are connected to the input end of compressor (1).

[0008] The solenoid valve (3-1), the thermal expansion valve (4-1), and the evaporator (7-1) are connected in sequence on the pipe (13); the solenoid valve (3-2), the thermal expansion valve (4-2), and the evaporator (7-2) are connected in sequence on the pipe (14); and the solenoid valve (3-3), the thermal expansion valve (4-3), and the evaporator (7-3) are connected in sequence on the pipe (15).

[0009] The temperature range of the main water tank (9) is -40 to 100℃.

[0010] The control temperature of the auxiliary water tank (10-1) is 0.5-1℃ higher than that of the main water tank (9), and the control temperature of the auxiliary water tank (10-2) is 0.5-1℃ lower than that of the main water tank (9).

[0011] The temperature control accuracy of the main water tank (9) is ≤0.05℃; the temperature control accuracy of the auxiliary water tank (10-1) is ≤0.1℃; and the control accuracy of the auxiliary water tank (10-2) is ≤0.1℃.

[0012] The solenoid valves (3-1, 3-2, 3-3) are initially in a closed state by default.

[0013] The controller (12) has two control modes:

[0014] Heating control mode: When the temperature sensor (5-1) detects that the temperature of the main water tank (9) drops, the controller (12) predicts the load based on the rate of temperature change and gives the running time of the water pump (8-1). The water pump (8-1) starts and the heating rod (6-1) starts at the same time, and the heating control mode is turned on. When the running time of the water pump (8-1) ends, the water pump (8-1) is turned off. When the temperature of the main water tank (9) reaches the set value, the heating rod (6-1) is turned off, and the heating control mode is completed.

[0015] Cooling control mode: When the temperature sensor (5-1) detects that the temperature of the main water tank (9) rises, the controller (12) predicts the load according to the rate of temperature change and gives the running time of the water pump (8-2). The water pump (8-2) starts and the compressor (1) starts at the same time, and the cooling control mode is turned on. When the running time of the water pump (8-2) ends, the water pump (8-2) is turned off. When the temperature of the main water tank (9) reaches the set value, the compressor (1) is turned off, and the cooling control mode is completed.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention employs a main and auxiliary water tank coordinated temperature control mechanism. When the temperature fluctuation of the main water tank exceeds the set range, the controller is activated to control the auxiliary water tank to quickly replenish the constant temperature auxiliary heat source, thereby achieving the effect of quickly eliminating the temperature fluctuation of the main water tank and eliminating the lag of temperature fluctuation.

[0018] This invention incorporates a built-in heating rod and evaporator, and, in conjunction with a controller, controls the water tank to assist in adjusting the main water tank's heat source temperature. The heat source temperature control accuracy is ≤0.05℃, meeting the requirements of high-precision equipment and instruments for a constant temperature environment.

[0019] The system of this invention has a simple structure, clear logic control, and low cost, making it suitable for applications requiring high water temperature accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a constant temperature heat source supply system according to the present invention;

[0021] Figure 2 This is a control logic diagram of a constant temperature heat source supply system according to the present invention;

[0022] In the diagram: 1. Compressor; 2. Condenser; 3-1, 3-2, 3-3. Solenoid valves; 4-1, 4-2, 4-3. Thermal expansion valves; 5-1, 5-2, 5-3. Temperature sensors; 6-1, 6-2, 6-3. Heating rods; 7-1, 7-2, 7-3. Evaporator; 8-1, 8-2, 8-3. Water pumps; 9. Main water tank; 10-1, 10-2. Auxiliary water tanks; 11. User terminal; 12. Controller; 13, 14, 15. Piping. Detailed Implementation

[0023] The principles and system of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting, and are not intended to limit the scope of protection of the present invention.

[0024] A constant temperature heat source supply system, characterized in that it includes a compressor (1), a condenser (2), solenoid valves (3-1, 3-2, 3-3), a thermal expansion valve (4-1, 4-2, 4-3), a temperature sensor (5-1, 5-2, 5-3), heating rods (6-1, 6-2, 6-3), an evaporator (7-1, 7-2, 7-3), a water pump (8-1, 8-2, 8-3), a main water tank (9), a secondary water tank (10-1, 10-2), a user terminal (11), a controller (12), and pipes (13, 14, 15); The main water tank (9), water pump (8-3), and user terminal (11) are connected in sequence, and the water pump (8-3) provides an auxiliary heat source to the user terminal; the auxiliary water tank (10-1), water pump (8-1), and main water tank (9) are connected in sequence; the auxiliary water tank (10-2), water pump (8-2), and main water tank (9) are connected in sequence, and the auxiliary water tank (10-1, 10-2) provides an auxiliary heat source to the main water tank (9) to eliminate the lag in temperature compensation of the main water tank (9); the controller (12), compressor (1), solenoid valves (3-1, 3-2, 3-3), Temperature sensors (5-1, 5-2, 5-3), heating rods (6-1, 6-2, 6-3), and water pumps (8-1, 8-2) are connected by wires, and the controller (12) performs overall system regulation; the temperature sensor (5-1), heating rod (6-1), and condenser (7-1) are located inside the main water tank (9), and the temperature sensor (5-1) predicts the rate of change of the heat load of the main water tank (9); the temperature sensor (5-2), heating rod (6-2), and condenser (7-2) are located inside the auxiliary water tank (10-1); the temperature sensor The compressor (5-3), heating rod (6-3), and condenser (7-3) are located inside the auxiliary water tank (10-2); the output end of the compressor (1) is connected to the input end of the condenser (2); three pipes (13, 14, 15) are formed on the pipe at the output end of the condenser (2), and the input ends of the three pipes are respectively connected to the main water tank (9), the auxiliary water tank (10-1), and the auxiliary water tank (10-2). The system structure is clear and easy to operate; the three pipes (13, 14, 15) are connected to the input end of the compressor (1), saving materials and reducing system costs.

[0025] As an example, the main water tank (9) is set to a temperature of 50°C, the auxiliary water tank (10-1) is set to a temperature of 50.53°C, and the auxiliary water tank (10-2) is set to a temperature of 49.52°C.

[0026] Heating control mode; when the temperature sensor (5-1) detects the real-time temperature T of the main water tank (9) c At 49.94℃, T cWhen the temperature falls below the set temperature of the main water tank (9), the temperature control mode is activated. The controller (12) calculates the rate of temperature change of the main water tank (9) based on the temperature change of the main water tank (9). According to the rate of change of the main water tank (9) Calculate the running time of water pump (8-1). Start water pump (8-1), proportionally regulate the injection of high-temperature auxiliary heat source in auxiliary water tank (10-1) into main water tank (9), and simultaneously start heating rod (6-1) to raise the temperature. When the running time of water pump (8-1) ends, water pump (8-1) is turned off. When the temperature of main water tank (9) reaches the set value, heating rod (6-1) is turned off, and the temperature control mode is completed.

[0027] Cooling control mode: When the temperature sensor (5-1) detects the real-time temperature T of the main water tank (9), c At 50.06℃, T c When the temperature exceeds the set temperature of the main water tank (9), the cooling control mode is activated. The controller (12) calculates the rate of temperature change of the main water tank (9) based on the temperature change of the main water tank (9). According to the rate of change of the main water tank (9) Determine the running time of water pump (8-2). Start water pump (8-2), proportionally regulate the injection of low-temperature auxiliary heat source in auxiliary water tank (10-2) into main water tank (9), and simultaneously start compressor (1) to assist in cooling. When the water pump (8-2) time expires, water pump (8-2) shuts down. When the temperature of main water tank (9) reaches the set value, compressor (1) shuts down, and the cooling control mode is completed.

[0028] This invention rapidly reduces the temperature fluctuations in the main water tank caused by interference factors during regulation. It achieves a high-precision, high-stability constant-temperature heat source supply, suitable for the requirements of high-precision instruments in fields such as medical, chemical, and precision manufacturing.

[0029] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A constant-temperature heat source supply system, characterized in that: Includes compressor (1), condenser (2), solenoid valves (3-1, 3-2, 3-3), thermal expansion valves (4-1, 4-2, 4-3), temperature sensors (5-1, 5-2, 5-3), heating rods (6-1, 6-2, 6-3), evaporator (7-1, 7-2, 7-3), water pump (8-1, 8-2, 8-3), main water tank (9), auxiliary water tank (10-1, 10-2), user terminal (11), control... The controller (12) and pipes (13, 14, 15); the main water tank (9), water pump (8-3) and user terminal (11) are connected in sequence; the auxiliary water tank (10-1), water pump (8-1) and main water tank (9) are connected in sequence; the auxiliary water tank (10-2), water pump (8-2) and main water tank (9) are connected in sequence; the controller (12) and compressor (1), solenoid valves (3-1, 3-2, 3-3), temperature sensor (5) are connected in sequence. -1, 5-2, 5-3), heating rods (6-1, 6-2, 6-3), and water pumps (8-1, 8-2) are connected by wires; the temperature sensor (5-1), heating rod (6-1), and condenser (7-1) are located inside the main water tank (9); the temperature sensor (5-2), heating rod (6-2), and condenser (7-2) are located inside the auxiliary water tank (10-1); the temperature sensor (5-3), heating rod (6-3), and condenser (7-2) are connected by wires. The compressor (1) and condenser (7-3) are located inside the auxiliary water tank (10-2); the output end of the compressor (1) is connected to the input end of the condenser (2); three pipes (13, 14, 15) are formed on the pipe at the output end of the condenser (2), and the input ends of the three pipes are connected to the main water tank (9), auxiliary water tank (10-1), and auxiliary water tank (10-2) respectively; the three pipes (13, 14, 15) are connected to the input end of the compressor (1).

2. The constant temperature heat source supply system according to claim 1, characterized in that: The solenoid valve (3-1), the thermal expansion valve (4-1), and the evaporator (7-1) are connected in sequence on the pipe (13); the solenoid valve (3-2), the thermal expansion valve (4-2), and the evaporator (7-2) are connected in sequence on the pipe (14); and the solenoid valve (3-3), the thermal expansion valve (4-3), and the evaporator (7-3) are connected in sequence on the pipe (15).

3. The constant temperature heat source supply system according to claim 1, characterized in that: The temperature range of the main water tank (9) is -40 to 100℃.

4. The constant temperature heat source supply system according to claim 1, characterized in that: The controlled temperature of the auxiliary water tank (10-1) is 0.5-1℃ higher than that of the main water tank (9), and the controlled temperature of the auxiliary water tank (10-2) is 0.5-1℃ lower than that of the main water tank (9).

5. A constant temperature heat source supply system according to claim 1, characterized in that: The temperature control accuracy of the main water tank (9) is ≤0.05℃; the temperature control accuracy of the auxiliary water tank (10-1) is ≤0.1℃; and the control accuracy of the auxiliary water tank (10-2) is ≤0.1℃.

6. A constant temperature heat source supply system according to claim 1, characterized in that: The solenoid valves (3-1, 3-2, 3-3) are initially in the closed state by default.

7. A constant temperature heat source supply system according to claim 1, characterized in that: The controller (12) has two control modes: Heating control mode: When the temperature sensor (5-1) detects that the temperature of the main water tank (9) drops, the controller (12) predicts the load according to the rate of temperature change and gives the running time of the water pump (8-1). The water pump (8-1) starts and the heating rod (6-1) starts at the same time, and the heating control mode is turned on. When the running time of the water pump (8-1) ends, the water pump (8-1) is turned off. When the temperature of the main water tank (9) reaches the set value, the heating rod (6-1) is turned off, and the heating control mode is completed. Cooling control mode: When the temperature sensor (5-1) detects that the temperature of the main water tank (9) rises, the controller (12) predicts the load according to the rate of temperature change and gives the running time of the water pump (8-2). The water pump (8-2) starts and the compressor (1) starts at the same time, and the cooling control mode is turned on. When the running time of the water pump (8-2) ends, the water pump (8-2) is turned off. When the temperature of the main water tank (9) reaches the set value, the compressor (1) is turned off, and the cooling control mode is completed.

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