Efficient hot water cooling system of machine edge cooling station and using method of efficient hot water cooling system

Abstract

The invention discloses an efficient hot water cooling system of a machine edge cooling station, which comprises a hot water tank, a thermotank and a mold, a bypass valve is arranged between the hot water tank and the thermotank, cooling water of the thermotank flows back to the hot water tank after flowing through the mold, and a high-pressure water supply pump and a normal-pressure water supply pump are arranged between a water outlet of the thermotank and a water inlet of the mold. A water outlet of the hot water tank is connected with a hot water circulating pump through a pipe, a water outlet of the hot water circulating pump is connected with a heat exchanger and a drain valve through pipes, and a first hot water on-off valve and a second hot water on-off valve are installed between a water outlet of the heat exchanger and a water inlet of the constant-temperature box and between a water outlet of the heat exchanger and a water inlet of the hot water tank respectively. According to the invention, the cooling energy consumption of equipment can be greatly optimized.

Description

Technical Field

[0001] The invention relates to a high-efficiency hot water cooling system for a machine-side cooling station and a use method thereof. Background Art

[0002] The existing machine-side cooling in the market is a one-stage cooling system that is directly connected in series with the chiller, and a two-stage cooling system is used to assist in cooling the water. The circulation state of the hot water cannot be adjusted according to the amount of cooling water, which greatly wastes energy. Summary of the Invention

[0003] In view of the above-mentioned defects of the prior art, the object of the present invention is to provide a high-efficiency hot water cooling system for a machine-side cooling station and a method for using the same.

[0004] The technical solution of the present invention is: a high-efficiency hot water cooling system of a machine-side cooling station, including a hot water tank, a constant temperature tank and a mold. A bypass valve is provided between the hot water tank and the constant temperature tank. The cooling water of the constant temperature tank flows through the mold and then returns to the hot water tank. A high-pressure water supply pump and a normal-pressure water supply pump are installed between the water outlet of the constant temperature tank and the water inlet of the mold. The water outlet of the hot water tank is connected to a hot water circulation pump through a pipe. The water outlet of the hot water circulation pump is connected to a heat exchanger and a drain valve through a pipe. A first hot water on-off valve and a second hot water on-off valve are respectively installed between the water outlet of the heat exchanger and the water inlet of the constant temperature tank and the water inlet of the hot water tank.

[0005] Furthermore, the hot water tank and the thermostatic tank are separated by a partition, and the upper end of the hot water tank is communicated with the upper end of the thermostatic tank.

[0006] Furthermore, when the mold has a large demand for hot water, the bypass valve is opened, and the water in the hot water tank reaches the thermostat through the bypass valve, increasing the liquid level in the thermostat to prevent shutdown caused by insufficient liquid level.

[0007] Furthermore, when the mold has a large demand for hot water and the amount of water passing through the bypass valve is insufficient to pass the excess water, the water in the hot water tank overflows over the partition and into the constant temperature tank. In addition, the first hot water on-off valve is opened, the hot water circulation pump is started, and the hot water in the hot water tank is pumped out by the hot water circulation pump, passes through the heat exchanger, and reaches the constant temperature tank.

[0008] Furthermore, when the mold cooling water usage is small, the bypass valve is opened and the water from the thermostat reaches the hot water tank;

[0009] Furthermore, when the mold cooling water consumption is small, the first hot water on-off valve is closed and the second hot water on-off valve is opened to circulate the water in the hot water tank for cooling. The water in the hot water tank is pressurized by the hot water circulation pump, passes through the heat exchanger, and returns to the hot water tank; when the water in the hot water tank reaches the set temperature or reaches the set liquid level, the first hot water on-off valve is opened and the second hot water on-off valve is closed. The water in the hot water tank passes through the hot water circulation pump and the heat exchanger to reach the constant temperature tank, thereby achieving final cooling.

[0010] Furthermore, when the water consumption of a single mold is within the pumping range, the first hot water on-off valve is opened and the second hot water on-off valve is closed. The water in the hot water tank passes through the hot water circulation pump and the heat exchanger and reaches the constant temperature box to achieve cooling.

[0011] Furthermore, during the cooling process, the speed of the hot water circulation pump needs to be adjusted to achieve a balance. The adjustment method is as follows:

[0012] Setting parameters: motor base frequency F1, motor maximum output frequency F2, maximum liquid level H1, minimum liquid level H2;

[0013] Current parameters: motor output frequency f, motor balancing frequency f1, current liquid level h;

[0014] The adjustment mode has the following three states:

[0015] (1) When h ≥ H1, then f = F2;

[0016] (2) When H2 <h

[0017] (3) When h≤H2, then f=0;

[0018] Since the water supply to the mold is intermittent or long-term, the water flow is large at the beginning and then decreases. The hot water tank temporarily stores the hot water. The ultimate goal is to keep the system in state (2) as much as possible. In this state, the heat exchanger can perform at its highest performance and is always in working condition.

[0019] Furthermore, when the mold cooling water needs to be removed and the water source needs to be renewed, the first hot water on-off valve and the second hot water on-off valve are closed, the drain valve is opened, and the hot water circulation pump speed is turned to the maximum.

[0020] The high-efficiency hot water cooling system and the use method of the machine-side cooling station provided by the present invention have the beneficial effect of greatly optimizing the cooling energy consumption of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] As shown in the figure: 1 - hot water tank, 2 - constant temperature tank, 3 - mold, 4 - bypass valve, 5 - high-pressure water supply pump, 6 - normal-pressure water supply pump, 7 - hot water circulation pump, 8 - heat exchanger, 9 - drain valve, 10 - first hot water on-off valve, 11 - second hot water on-off valve, 12 - partition. DETAILED DESCRIPTION

[0023] In order to more intuitively and completely understand the technical solution of the present invention, a non-limiting description of the features of the present invention is now provided below in conjunction with the accompanying drawings: ​

[0024] like Figure 1 As shown, the high-efficiency hot water cooling system of the machine-side cooling station includes a hot water tank 1, a constant temperature tank 2 and a mold 3. A bypass valve 4 is provided between the hot water tank 1 and the constant temperature tank 2. The cooling water of the constant temperature tank 2 flows through the mold 3 and then returns to the hot water tank 1. A high-pressure water supply pump 5 and a normal-pressure water supply pump 6 are installed between the water outlet of the constant temperature tank 2 and the water inlet of the mold 3. The water outlet of the hot water tank 1 is connected to a hot water circulation pump 7 through a pipe. The water outlet of the hot water circulation pump 7 is connected to a heat exchanger 8 and a drain valve 9 through a pipe. A first hot water on-off valve 10 and a second hot water on-off valve 11 are respectively installed between the water outlet of the heat exchanger 8 and the water inlet of the constant temperature tank 2 and the water inlet of the hot water tank 1.

[0025] The hot water tank 1 and the thermostatic tank 2 are separated by a partition 12 , and the upper end of the hot water tank 1 is communicated with the upper end of the thermostatic tank 2 .

[0026] When mold 3 has a large demand for hot water (water consumption per mold > minimum pumping speed × single mold time), bypass valve 4 is opened, and the water in hot water tank 1 reaches thermostat 2 through bypass valve 4, increasing the liquid level in thermostat 2 to prevent shutdown caused by insufficient liquid level.

[0027] When the mold 3 has a large demand for hot water (water consumption per mold > minimum pumping speed of the pump × single mold time), and the water volume passing through the bypass valve 4 is insufficient to pass the excess water, the water in the hot water tank 1 overflows over the partition 12 to the constant temperature tank 2, and the first hot water on-off valve 10 is opened, the second hot water on-off valve 11 is closed, and the hot water circulation pump 7 is running. The hot water in the hot water tank 1 is pumped out by the hot water circulation pump 7, passes through the heat exchanger 8, and reaches the constant temperature tank 2.

[0028] When the cooling water consumption of mold 3 is small (water consumption per mold < minimum pumping speed of the pump × single mold time), the bypass valve 4 is opened, and the water in the thermostat tank 2 reaches the hot water tank 1, which not only reduces the water temperature of the hot water tank 1, but also increases the water volume of the hot water tank 1;

[0029] When the cooling water consumption of the mold 3 is small (water consumption per mold < minimum pumping speed of the pump × single mold time), the first hot water on-off valve 10 is closed and the second hot water on-off valve 11 is opened to circulate the water in the hot water tank 1 for cooling. The water in the hot water tank 1 is pressurized by the hot water circulation pump 7, passes through the heat exchanger 8, and returns to the hot water tank 1; when the water in the hot water tank 1 reaches the set temperature or reaches the set liquid level, the first hot water on-off valve 10 is opened and the second hot water on-off valve 11 is closed. The water in the hot water tank 1 passes through the hot water circulation pump 7 and the heat exchanger 8 and reaches the constant temperature tank 2 to achieve final cooling.

[0030] When the water consumption of the mold 3 for a single mold is within the pumping range, the first hot water on-off valve 10 is opened and the second hot water on-off valve 11 is closed. The water in the hot water tank 1 passes through the hot water circulation pump 7 and the heat exchanger 8 and reaches the constant temperature box 2 to achieve cooling.

[0031] During the cooling process, the speed of the hot water circulation pump 7 needs to be adjusted to achieve a balance. The adjustment method is as follows:

[0032] Setting parameters: motor base frequency F1, motor maximum output frequency F2, maximum liquid level H1, minimum liquid level H2;

[0033] Current parameters: motor output frequency f, motor balancing frequency f1, current liquid level h;

[0034] The adjustment mode has the following three states:

[0035] (1) When h ≥ H1, then f = F2;

[0036] (2) When H2 <h

[0037] (3) When h≤H2, then f=0;

[0038] Since the water supply to the mold is intermittent or long-term, the water flow is large at the beginning and then decreases. The hot water tank temporarily stores the hot water. The ultimate goal is to keep the system in state (2) as much as possible. In this state, the heat exchanger can perform at its highest performance and is always in working condition.

[0039] When it is necessary to remove the cooling water of the mold 3 and renew the water source, the first hot water on-off valve 10 and the second hot water on-off valve 11 are closed, the drain valve 9 is opened, and the hot water circulation pump 7 is turned on to the maximum speed.

[0040] The high-efficiency hot water cooling system of the machine-side cooling station and the use method thereof provided by the present invention can greatly optimize the cooling energy consumption of the equipment.

[0041] Of course, the above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All simple modifications and equivalent structural changes made using the contents of the description and drawings of the present invention should be included in the patent protection scope of the present invention.​

Claims

1. High-efficiency hot water cooling system of machine-side cooling station, characterized by: It includes a hot water tank, a constant temperature tank and a mold. A bypass valve is provided between the hot water tank and the constant temperature tank. The cooling water of the constant temperature tank flows back to the hot water tank after passing through the mold. A high-pressure water supply pump and a normal-pressure water supply pump are installed between the water outlet of the constant temperature tank and the water inlet of the mold. The water outlet of the hot water tank is connected with a hot water circulation pump through a pipe. The water outlet of the hot water circulation pump is connected with a heat exchanger and a drain valve through a pipe. A first hot water on-off valve and a second hot water on-off valve are respectively installed between the water outlet of the heat exchanger and the water inlet of the constant temperature tank and the water inlet of the hot water tank.

2. The high-efficiency hot water cooling system for the machine-side cooling station according to claim 1, characterized in that: The hot water tank and the constant temperature tank are separated by a partition, and the upper ends of the hot water tank and the constant temperature tank are connected.

3. The method for using the high-efficiency hot water cooling system of the machine-side cooling station according to claim 2, characterized in that: When the hot water demand of the mold is large, open the bypass valve, and the water in the hot water tank reaches the constant temperature tank through the bypass valve, increasing the liquid level of the constant temperature tank to prevent shutdown caused by insufficient liquid level.

4. The method for using the high-efficiency hot water cooling system of the machine-side cooling station according to claim 2, characterized in that: When the hot water demand of the mold is large and the amount of water passing through the bypass valve is not enough to pass the excess water, the water in the hot water tank overflows to the constant temperature tank after crossing the partition. And open the first hot water on-off valve, the hot water circulation pump runs, and the hot water in the hot water tank is pumped out by the hot water circulation pump, passes through the heat exchanger and reaches the constant temperature tank.

5. The method for using the high-efficiency hot water cooling system of the machine-side cooling station according to claim 2, characterized in that: When the cooling water consumption of the mold is small, open the bypass valve, and the water in the constant temperature tank reaches the hot water tank.

6. The method for using the high-efficiency hot water cooling system of the machine-side cooling station according to claim 2, characterized in that: When the cooling water consumption of the mold is small, close the first hot water on-off valve, open the second hot water on-off valve, and cool the water circulation of the hot water tank. The water in the hot water tank is pressurized by the hot water circulation pump, passes through the heat exchanger and returns to the hot water tank; when the water in the hot water tank reaches the set temperature or the set liquid level, open the first hot water on-off valve and close the second hot water on-off valve, and the water in the hot water tank passes through the hot water circulation pump and the heat exchanger and reaches the constant temperature tank to achieve the final cooling.

7. The method for using the high-efficiency hot water cooling system of the machine-side cooling station according to claim 2, characterized in that: When the water consumption per single mold of the mold is within the range of pump water extraction, open the first hot water on-off valve and close the second hot water on-off valve, and the water in the hot water tank passes through the hot water circulation pump and the heat exchanger and reaches the constant temperature tank to achieve cooling.

8. The method for using the high-efficiency hot water cooling system of the in-machine cooling station according to claim 7, wherein: During the cooling process, it is necessary to adjust the speed of the hot water circulation pump to achieve a balance. The adjustment method is as follows: Set parameters: motor base frequency F1, motor maximum output frequency F2, highest liquid level H1, lowest liquid level H2; Current parameters: motor output frequency f, motor balance frequency f1, current liquid level h; There are three states of the adjustment method: (1) When h≥H1, then f = F2; (2) When H2 < h < H1, then f = f1; (3) When h≤H2, then f = 0; Due to the intermittent water supply or long-term water supply in the water passing state of the mold, the water passing volume is large at the beginning and becomes smaller later. The hot water tank temporarily stores the hot water first. The ultimate goal is to try to keep the system always in state (2); in this state, the heat exchanger can exert its highest performance and the heat exchanger is always in working state.

9. The method for using the high-efficiency hot water cooling system of the machine-side cooling station according to claim 2, characterized in that: When it is necessary to drain the cooling water of the mold and update the water source, close the first hot water on-off valve and the second hot water on-off valve, open the drain valve, and turn on the speed of the hot water circulation pump to the maximum.

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