High-precision double-temperature water supply control water chilling unit with refrigerating system

Abstract

The utility model relates to the technical field of refrigeration, and discloses a high-precision double-temperature water supply control water chilling unit with a refrigeration system, and the refrigeration system comprises a compressor, a condenser, a throttle valve and an evaporator which are communicated in sequence; the water system comprises a water flow loop A and a water flow loop B, and the loop A and the loop B do not interfere with each other; the control system comprises a pressure sensor, a first temperature sensor, a second temperature sensor and a controller. According to the high-precision double-temperature water supply control water chilling unit with the refrigerating system, return water of the loop A is cooled through the evaporator, cooled cooling water enters the water tank and is fed into the heat exchanger, needing heat exchange and temperature control, of the loop A after passing through the first water pump, and circulation is conducted in this way; after return water of the B loop passes through the three-way regulating valve, part of the return water enters the evaporator, cooling water cooled by the evaporator enters the water tank, and the return water from the three-way regulating valve is converged at an inlet of the second water pump and then fed into the heat exchanger needing heat exchange and temperature control of the B loop through the second water pump.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to a high-precision dual-temperature water supply control chiller with a refrigeration system. Background Art

[0002] Due to process requirements, some existing industrial equipment needs to provide two cooling systems with different temperature requirements, one low-temperature cooling system and one normal temperature (close to ambient temperature) cooling system. For example, the laser body and laser output end (cutting head) of the laser cutting machine need a low-temperature cooling system and a normal temperature cooling system respectively. Most of the current dual-temperature industrial cooling systems are equipped with two compressors to form two cooling systems to meet the cooling needs of industrial equipment. This not only increases the cost of purchasing equipment and occupies a larger installation space, but also has a large number of compressors, frequent start and stop, and cannot fully utilize the compressors, making maintenance difficult.

[0003] Another problem with dual-temperature water supply chillers at present is that the two circuits have different requirements for water supply temperature and stability of water supply temperature. Often one circuit only needs the water supply temperature to be stabilized within ±1.0℃ or even ±2.0℃ of the target value, while the other circuit needs the water supply temperature to be stabilized within ±0.2℃ or even ±0.1℃ of the target value. In order to meet the requirements, traditional single refrigeration system chillers can only design the entire system according to the indicators of the circuit with higher temperature stability requirements, which results in great waste in both equipment manufacturing cost and operating cost. Utility Model Content

[0004] The purpose of the utility model is to provide a high-precision dual-temperature water supply control chiller with a refrigeration system to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a high-precision dual-temperature water supply control chiller with a refrigeration system, comprising a refrigeration system, a water system and a control system;

[0006] The refrigeration system comprises a compressor, a condenser, a throttle valve and an evaporator which are connected in sequence;

[0007] The water system comprises two water flow loops A and B, wherein the A loop and the B loop do not interfere with each other;

[0008] The control system includes a pressure sensor, a first temperature sensor, a second temperature sensor and a controller.

[0009] Preferably, a fan is installed on the condenser.

[0010] Preferably, the A circuit includes an evaporator, a water tank and a water pump 1 which are connected in sequence, and the outlet of the water pump 1 is connected to a heat exchanger in the A circuit that requires heat exchange and temperature control.

[0011] Preferably, the B loop includes a three-way regulating valve and water pump 2 which are connected in sequence, the inlet of water pump 2 is connected to the water tank, and the outlet of water pump 2 is connected to a heat exchanger of the B loop that requires heat exchange and temperature control.

[0012] Preferably, the pressure sensor is installed at the outlet of the compressor.

[0013] Preferably, the temperature sensor is installed at the outlet of the A circuit.

[0014] Preferably, the second temperature sensor is installed at the outlet of the B circuit.

[0015] Preferably, the controller is respectively connected to the circuits controlling the compressor, the fan, the water pump 1, the water pump 2 and the three-way regulating valve.

[0016] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0017] First, in the utility model, the return water of loop A is cooled by the evaporator, and the cooled cooling water enters the water tank, and is sent to the heat exchanger in loop A that needs heat exchange and temperature control through water pump 1, and the cycle continues; after the return water of loop B passes through the three-way regulating valve, a part of the return water enters the evaporator, and the cooling water cooled by the evaporator enters the water tank, and after merging with the return water from the three-way regulating valve at the inlet of water pump 2, it is sent to the heat exchanger in loop B that needs heat exchange and temperature control through water pump 2, and the cycle continues. The present application only needs one compressor to provide two different cooling systems, which is easy to use, has a high unit energy efficiency ratio, is well optimized, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model.

[0019] Among them: 1. Compressor; 2. Condenser; 3. Fan; 4. Throttle valve; 5. Evaporator; 6. Pressure sensor; 7. Controller; 21. Water pump 1; 22. Water pump 2; 23. Temperature sensor 1; 24. Temperature sensor 2; 25. Three-way regulating valve; 26. Water tank. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model provides the following technical solutions:

[0022] Embodiment 1

[0023] See also Figure 1 , a high-precision dual-temperature water supply control chiller with a refrigeration system, including a refrigeration system, a water system and a control system;

[0024] The refrigeration system comprises a compressor 1, a condenser 2, a throttle valve 4 and an evaporator 5 which are connected in sequence;

[0025] The water system consists of two water flow loops, A and B. Loop A and loop B do not interfere with each other;

[0026] The control system includes a pressure sensor 6, a temperature sensor 23, a temperature sensor 24 and a controller 7. A fan 3 is installed on the condenser 2. The A circuit includes an evaporator 5, a water tank 26 and a water pump 21 connected in sequence. The outlet of the water pump 21 is connected to the heat exchanger of the A circuit that needs heat exchange and temperature control. The B circuit includes a three-way regulating valve 25 and a water pump 22 connected in sequence. The inlet of the water pump 22 is connected to the water tank 26, and the outlet of the water pump 22 is connected to the heat exchanger of the B circuit that needs heat exchange and temperature control. The pressure sensor 6 is installed at the outlet of the compressor 1, the temperature sensor 23 is installed at the outlet of the A circuit, and the temperature sensor 2 24 is installed at the outlet of the B circuit. The controller 7 is respectively connected to the circuits controlling the compressor 1, the fan 3, the water pump 21, the water pump 22 and the three-way regulating valve 25.

[0027] Through the above technical solution, when the controller 7 detects that the temperature measured by the temperature sensor 23 is higher than the set value, the controller 7 controls the compressor 1 and the fan 2 to start, the condenser 2, the throttle valve 4 and the evaporator 5 to work, and the circulating water temperature in the water tank 26 decreases until the temperature sensor 23 monitors that the temperature of the circulating water at the outlet of the water pump 21 is lower than the set value; when the controller 7 detects that the temperature measured by the temperature sensor 24 is higher than the set value, the controller 7 increases the bypass volume of the three-way regulating valve 25 until the temperature sensor 24 monitors that the temperature of the circulating water at the outlet of the water pump 22 reaches the set value, and the controller 7 continuously calculates the bypass volume demand of the three-way regulating valve 25 according to the change of the circulating water temperature until the optimal value is reached.

[0028] The utility model has the advantages of simple structure, high efficiency and energy saving, intelligent regulation, and high-precision control of the water supply temperature of the cooling system, and can simultaneously realize two different water supply temperature requirements by using one refrigeration system.

[0029] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision dual-temperature water supply control chiller with a refrigeration system, characterized in that: Including refrigeration system, water system and control system; The refrigeration system comprises a compressor (1), a condenser (2), a throttle valve (4) and an evaporator (5) which are connected in sequence; The water system includes two water flow loops A and B, and the A loop and the B loop do not interfere with each other; The control system comprises a pressure sensor (6), a temperature sensor 1 (23), a temperature sensor 2 (24) and a controller (7).

2. A high-precision dual-temperature water supply control chiller with a refrigeration system according to claim 1, characterized in that: A fan (3) is installed on the condenser (2).

3. A high-precision dual-temperature water supply control chiller with a refrigeration system according to claim 1, characterized in that: The A circuit comprises an evaporator (5), a water tank (26) and a water pump (21) which are connected in sequence, and the outlet of the water pump (21) is connected to a heat exchanger in the A circuit that needs heat exchange and temperature control.

4. A high-precision dual-temperature water supply control chiller with a refrigeration system according to claim 1, characterized in that: The B circuit comprises a three-way regulating valve (25) and a water pump (22) which are connected in sequence. The inlet of the water pump (22) is connected to a water tank (26), and the outlet of the water pump (22) is connected to a heat exchanger of the B circuit which needs heat exchange and temperature control.

5. A high-precision dual-temperature water supply control chiller with a refrigeration system according to claim 1, characterized in that: The pressure sensor (6) is installed at the outlet of the compressor (1).

6. A high-precision dual-temperature water supply control chiller with a refrigeration system according to claim 1, characterized in that: The temperature sensor 1 (23) is installed at the outlet of the A circuit.

7. A high-precision dual-temperature water supply control chiller with a refrigeration system according to claim 1, characterized in that: The second temperature sensor (24) is installed at the outlet of the B circuit.

8. A high-precision dual-temperature water supply control chiller with a refrigeration system according to claim 1, characterized in that: The controller (7) is respectively connected to the circuits controlling the compressor (1), the fan (3), the first water pump (21), the second water pump (22) and the three-way regulating valve (25).

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