Simple structure temperature control precise water chiller system

Abstract

The utility model relates to a kind of simple structure temperature-control accurate cold water machine system, solve the problem of the complex structure of current cold water machine, large outlet water temperature fluctuation. Including with cold equipment, cold water machine system further include plate heat exchanger, filter, backwater temperature sensor, outlet water temperature sensor and mixing device, plate heat exchanger is equipped with plate heat exchanger hot side water inlet, plate heat exchanger hot side water outlet, plate heat exchanger cold side water inlet, plate heat exchanger cold side water outlet. The utility model exchanges heat with external cooling water source using plate heat exchanger;And by setting tee valve on backwater pipe, according to system actual load (such as backwater temperature or outlet water temperature) dynamic adjustment the proportion of cooling water quantity and bypass water quantity that flow through plate heat exchanger, realize accurate, continuous and smooth control to outlet water temperature. In addition simple structure, energy consumption is low, compressor operation noise is small, especially suitable for the occasion of high temperature control precision requirement, need energy saving and emission reduction.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, specifically to a chiller system with a simple structure and precise temperature control. Background Technology

[0002] Traditional chiller units generally employ a vapor compression refrigeration cycle, with the compressor as its core component. While this system offers high cooling capacity, it suffers from drawbacks such as high compressor energy consumption, high operating noise, complex structure, high maintenance costs, and low efficiency under partial load. For applications that do not require extremely low temperatures but demand high precision and stability in temperature control, and seek to reduce energy consumption and noise (such as laboratory equipment cooling, data center server heat dissipation, and precision machining equipment cooling), traditional compressor-type chillers are not the optimal choice.

[0003] Existing technologies include some designs that attempt to simplify the system or adopt other refrigeration methods, but these often employ crude control methods. For example, they may use simple on / off valves for control, resulting in large fluctuations in the outlet water temperature and failing to meet the requirements for precise temperature control. Therefore, there is an urgent need for a chiller solution that is energy-efficient, low-noise, and capable of achieving high-precision temperature control. Utility Model Content

[0004] The purpose of this invention is to solve the problems of complex structure and large fluctuations in outlet water temperature in existing water chillers.

[0005] The technical solution adopted to solve the technical problem proposed by this utility model is as follows: The chiller system of this utility model with simple structure and precise temperature control includes a cooling device. The chiller system also includes a plate heat exchanger, a filter, a return water temperature sensor, an outlet water temperature sensor, and a mixing device. The plate heat exchanger is provided with a hot-side inlet, a hot-side outlet, a cold-side inlet, and a cold-side outlet. The outlet of the cooling device is connected to the inlet of the filter through a return water pipe. The return water temperature sensor is located on the return water pipe. The outlet of the filter is connected to the hot-side inlet of the plate heat exchanger through a three-way valve. The hot-side outlet of the plate heat exchanger is connected to the inlet of the mixing device. The inlet of the mixing device is also connected to the three-way valve. The outlet of the mixing device is connected to the inlet of the circulating pump. The outlet of the circulating pump is connected to the inlet of the cooling device through a supply water pipe. The outlet water temperature sensor is located on the supply water pipe.

[0006] The technical solutions that further define this utility model include: The filter is a Y-type filter.

[0007] The three-way valve is a three-way solenoid valve.

[0008] The cold-side water inlet of the plate heat exchanger and the cold-side water outlet of the plate heat exchanger are connected with the water outlet and the water inlet of the cooling tower system respectively.

[0009] The three-way valve is connected with the water inlet of the mixing device through the bypass pipeline.

[0010] Through the above technical scheme, the plate heat exchanger is used for heat exchange with an external cooling water source; a three-way valve is arranged on the return water pipe; the proportion of the cooling water amount and the bypass water amount flowing through the plate heat exchanger is dynamically adjusted according to the actual load (such as the return water temperature or the outlet water temperature) of the system; the outlet water temperature is accurately, continuously and stably controlled; the structure is simple; the energy consumption is low; the operation noise of the compressor is small; the device is especially suitable for occasions with high temperature control precision requirements and energy saving and emission reduction requirements. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 FIG. 1 is a structural schematic view of the cold water machine system of the utility model.

[0012] Wherein, cold equipment 1, plate heat exchanger 2, plate heat exchanger hot side water inlet 21, plate heat exchanger hot side water outlet 22, plate heat exchanger cold side water inlet 23, plate heat exchanger cold side water outlet 24, filter 3, return water temperature sensor 4, outlet water temperature sensor 5, circulating pump 6, mixing device 7, return water pipe 8, three-way valve 9, water supply pipe 10, bypass pipeline 11, cooling tower system 12. DETAILED DESCRIPTION

[0013] The structure of the utility model is further described below with reference to the drawings.

[0014] REFERENCE Figure 1The utility model discloses simple structure temperature control accurate chiller system includes with cold equipment 1, and the chiller system still includes plate heat exchanger 2, filter 3, backwater temperature sensor 4, outlet water temperature sensor 5, circulating pump 6 and mixing device 7, in this embodiment, filter is Y type filter. Plate heat exchanger 2 is equipped with plate heat exchanger hot side water inlet 21, plate heat exchanger hot side water outlet 22, plate heat exchanger cold side water inlet 23, plate heat exchanger cold side water outlet 24, in this embodiment, plate heat exchanger cold side water inlet and plate heat exchanger cold side water outlet are connected with the water outlet and water inlet of cooling tower system 12 respectively. Cooling tower system circulates the water of plate heat exchanger cold side and exchanges energy with the water of heat exchanger hot side. The water outlet of cold equipment 1 is connected with the water inlet of filter 3 through backwater pipe 8, and backwater temperature sensor 4 is located on backwater pipe 8, and the water outlet of filter 3 is connected with plate heat exchanger's hot side water inlet 21 through three-way valve 9, and three-way valve 9 is three-way electromagnetic valve. The backwater returned from cold equipment 1 enters three-way valve 9 after flowing through Y type filter and removing impurities. Three-way valve acts under the instruction of control system. Three-way valve directs part or all backwater to plate heat exchanger's hot side water inlet 21. Backwater is fully cooled in plate heat exchanger and exchanges heat with external cooling water. Plate heat exchanger's hot side water outlet 22 is connected with the water inlet of mixing device 7, and the water inlet of mixing device 7 is also connected with three-way valve 9, in this embodiment, three-way valve is connected with the water inlet of mixing device through bypass pipeline 11. Part of backwater from three-way valve and cold water from plate heat exchanger's hot side water outlet can be used to adjust water temperature after mixing in mixing device. The water outlet of mixing device 7 is connected with the water inlet of circulating pump 6, and the water outlet of circulating pump 6 is connected with the water inlet of cold equipment 1 through water supply pipe 10, and outlet water temperature sensor 5 is located on water supply pipe. Circulating pump transports the water adjusted by mixing device to cold equipment after pressurizing. When system load increases (for example, cold equipment produces heat and causes backwater temperature to rise), backwater temperature sensor detects that the temperature is higher than the set value. Control system instructs to adjust three-way valve to reduce the opening of bypass pipeline, so that most or all backwater flows through plate heat exchanger and is fully cooled, thereby reducing outlet water temperature. When system load decreases (backwater temperature decreases), control system instructs to adjust three-way valve to increase the opening of bypass pipeline, so that part of backwater is directly bypassed and mixed with cold water from plate heat exchanger. In this way, energy waste (excessive cooling) is avoided, and the stability of outlet water temperature can be maintained quickly.

[0015] The utility model discloses a utilize plate heat exchanger with external cooling water source and carry out heat exchange, and through setting up the three -way valve on the backwater pipe, according to system actual load (such as backwater temperature or outlet water temperature) dynamic regulation of the proportion of the cooling water amount and bypass water amount of flowing through plate heat exchanger, realize the accurate, continuous and stable control to outlet water temperature. In addition simple structure, low energy consumption, no compressor operation noise is small, especially suitable for the occasion of high temperature control precision requirement, need energy -conserving and emission -reducing.

[0016] Although the specific embodiments of the utility model have been described in detail with reference to the drawings, it should not be understood as limiting the scope of protection of the utility model. Various modifications and changes made by those skilled in the art within the scope described in the claims still belong to the protection scope of the utility model.

Claims

1. A chiller system with simple structure and precise temperature control, comprising a refrigeration unit, characterized in that: The chiller system also includes a plate heat exchanger, a filter, a return water temperature sensor, an outlet water temperature sensor, and a mixing device. The plate heat exchanger is equipped with a hot-side inlet, a hot-side outlet, a cold-side inlet, and a cold-side outlet. The outlet of the chilled equipment is connected to the inlet of the filter via a return water pipe. The return water temperature sensor is located on the return water pipe. The outlet of the filter is connected to the hot-side inlet of the plate heat exchanger via a three-way valve. The hot-side outlet of the plate heat exchanger is connected to the inlet of the mixing device. The inlet of the mixing device is also connected to the three-way valve. The outlet of the mixing device is connected to the inlet of the circulating pump. The outlet of the circulating pump is connected to the inlet of the chilled equipment via a supply water pipe. The outlet water temperature sensor is located on the supply water pipe.

2. The chiller system with simple structure and precise temperature control as described in claim 1, characterized in that: The filter is a Y-type filter.

3. The chiller system with simple structure and precise temperature control as described in claim 1, characterized in that: The three-way valve is a three-way solenoid valve.

4. The chiller system with simple structure and precise temperature control as described in claim 1, characterized in that: The cold-side inlet and outlet of the plate heat exchanger are respectively connected to the outlet and inlet of the cooling tower system.

5. A chiller system with simple structure and precise temperature control as described in claim 1, characterized in that: The three-way valve is connected to the inlet of the mixing device via a bypass pipeline.

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