WO2011147058A1

WO2011147058A1 - Screw-type water chilling unit cooled by water and control method thereof

Info

Publication number: WO2011147058A1
Application number: PCT/CN2010/001245
Authority: WO
Inventors: 张平
Original assignee: 广东欧科空调制冷有限公司
Priority date: 2010-05-26
Filing date: 2010-08-17
Publication date: 2011-12-01
Also published as: CN101858661A

Abstract

A screw-type water chilling unit cooled by water and the control method thereof are disclosed. The water chilling unit cooled by water comprises a chassis (1) and a compressor (2), a condenser (3), an electronic expansion valve (4), a drying filter (5), an evaporator (6), an electric control box (7), refrigeration accessories, connecting pipelines arranged on the chassis. A mutual inductor for collecting current data is arranged between the main power supply and the compressor (1). A control module is arranged between the mutual inductor and the compressor (1). The control method applies the following steps: the mutual inductor collecting the real-time current value outputted from the main power supply to the compressor (1) during the operation of the compressor (1) and transferring the collected current value to the control module, then the control module comparing the actually detected current value collected by the mutual inductor with a theoretical value and outputting a load increasing or decreasing signal to the compressor (1) according to the comparing result so as to adjust the operation load of the compressor (1).

Description

Description: A screw-type water-cooled chiller and a control method thereof TECHNICAL FIELD The present invention relates to a water-cooled chiller. Background technique

Water-cooled chillers typically include a chassis, a compressor, a condenser, an electronic expansion valve, a drying filter, an evaporator, a refrigeration accessory, and a connecting line disposed on the chassis. However, existing water-cooled chillers have too many shortcomings in terms of use, performance and function, and cannot meet the needs of today's customers. Therefore, it is urgent to invent a water-cooled chiller that can meet various conditions. Summary of the invention

The technical problem to be solved by the present invention is to provide a water-cooled chiller unit which is convenient to use and superior in performance. The present invention is achieved by the following technical solutions:

A water-cooled chiller of the present invention includes a chassis, a compressor, a condenser, an electronic expansion valve, a drying filter, an evaporator, an electric control box, a refrigeration accessory, and a connecting line disposed on the chassis; The utility model comprises an oil pressure sensor for detecting the oil pressure level, and a heat insulation member coated on one end of the compressor; the condenser is provided with a safety valve and a sewage discharge for removing the residue; the electronic expansion valve and the connection The tubing is detachably assembled together.

Preferably, the compressor is provided with an adapter box for collecting various lines.

Preferably, a clamp is disposed between the condenser opening and the water pipe.

Preferably, the chassis is detachably assembled with the chiller.

Preferably, the other end of the compressor is coated with a heat sink. Preferably, a transformer for using current data is provided between the main power source and the compressor, and a control module is disposed between the transformer and the compressor; the transformer is collected from the main power source to the compressor when the compressor is working in real time. The current value is then transmitted to the control module. The control module compares the measured current value collected by the transformer with the theoretical value. According to the comparison result, the control module increases or decreases the load signal to the compressor output, and adjusts the control compression. Machine workload.

The water-cooled chiller of the present invention is equipped with accessories capable of achieving various functions, and has been greatly improved in terms of use, performance, and function as compared with the current technology, and can meet the needs of current customers. DRAWINGS

For ease of description, the present invention is described in detail by the following preferred embodiments and the accompanying drawings.

Figure 1 is a perspective view of a water-cooled chiller of the present invention;

Figure 2 is a rear view of the water-cooled chiller of the present invention;

Fig. 3 is a schematic view showing the control method of the water-cooled chiller of the present invention. detailed description

As shown in FIG. 1 to FIG. 3, a water-cooled chiller of the present invention comprises a chassis 1, a compressor 2 disposed on the chassis 1, a condenser 3, an electronic expansion width 4, a drying filter 5, and an evaporator 6. , the electric control box 7, the refrigeration accessory and the connecting pipeline; the compressor 2 includes an oil pressure sensor 20 for detecting the oil pressure, and a heat insulating member 21 covering the end of the compressor, and is covered a heat dissipating member 22 at the other end of the compressor 2; the condenser 3 is provided with a safety valve 30, and a drain valve 31 for removing residue; the electronic expansion valve 4 is detachably assembled with the connecting pipe.

The oil pressure sensor 20 can detect the level of the oil pressure, determine the amount of oil stain based on the pressure difference, notify the user by the oil pressure sensor alarm, and replace the filter, thereby improving Life expectancy. The heat insulating member 21 can separate the contact between the compressor 2 and the air, does not generate water droplets, can maintain a good environment, and can prevent heat from being scattered, thereby improving work efficiency. The heat dissipating member 22 can quickly dissipate the heat of the exhaust end of the compressor, thereby improving work efficiency. The condenser 3 is provided with a safety valve 30, and does not need to be provided with a plurality of 1/2-inch safety valves. The processing is simple, beautiful and beautiful, and there is no leakage, and the safety is good. The sewage discharge width 31 can adjust the oil discharge and sewage discharge, and does not leave residues in the equipment, so that the service life of the equipment becomes long, and the refrigeration effect is good. When the coil and the spool of the electronic expansion valve 4 fail, it is only necessary to replace the coil and the wide core, which has the advantages of saving time and labor, convenient disassembly and assembly, and saving cost. The compressor 2 is provided with an adapter box (not shown) for collecting various lines, so that various lines are clear, and it is convenient to find the electric wires corresponding to the electric components. A clamp 32 is disposed between the opening of the condenser 3 and the water pipe, and does not need to be fixed by a flange. Compared with the prior art, the installation is simple and the connection is convenient. The chassis 1 is detachably assembled with the chiller, is very convenient in the process of installation and transportation, and the connection is firm and stable. The chassis 1 is detachably assembled with the chiller, and the chassis 1 can be assembled as needed. It is easy to use if you choose to disassemble or not.

The control method adopts current control, and a transformer for using current data is arranged between the main power source and the compressor, and a control module is arranged between the transformer and the compressor; the transformer is collected from the main power source when the compressor is working in real time. The current value to the compressor is then transmitted to the control module. The control module compares the measured current value collected by the transformer with the theoretical value. According to the comparison result, the control module increases or decreases the output to the compressor. Signal, adjusts and controls the working load of the compressor. The invention changes the traditional technology by using the temperature control compressor to operate, but by measuring the compressor operating current, comparing the measured current with the theoretical value, thereby judging whether to increase or decrease the working load of the compressor, or to maintain it Constantly, the use of this current control method not only greatly improves the accuracy and real-time performance of data acquisition, but more importantly, because the probability of failure of the transformer is small, it has higher reliability than the conventional method, and maximizes the reliability. Make sure the device is working properly.

The water-cooled chiller of the present invention has a relatively large number of functions, and is relatively simple. In terms of use, performance, performance and functionality have been greatly improved to meet the needs of today's customers.

The above-mentioned embodiments are merely examples of the present invention, and are not intended to limit the scope of the invention and the scope of the invention, and the technical solutions that are the same or equivalent to those described in the claims of the present invention are included in the scope of the present invention.

Claims

Claim

A water-cooled chiller comprising a chassis, a compressor disposed on the chassis, a condenser, an electronic expansion valve, a drying filter, an evaporator, an electrical control box, a main power supply, a refrigeration accessory, and a connecting line; The compressor includes: a hydraulic pressure sensor for detecting a high oil pressure, and a heat insulating member covering one end of the compressor; the condenser is provided with a safety valve, and a drain valve for removing the residue; The electronic expansion valve is detachably assembled with the connecting pipe.

The water-cooled chiller according to claim 1, wherein the compressor is provided with an adapter box for collecting various lines.

The water-cooled chiller according to claim 1, wherein a clamp is disposed between the condenser opening and the water pipe.

The water-cooled chiller according to claim 1, wherein the chassis and the chiller unit are detachably assembled.

The water-cooled chiller according to claim 1, wherein the other end of the compressor is coated with a heat sink.

The water-cooled chiller according to claim 1, wherein a transformer for using current data is provided between the main power source and the compressor, and a control module is disposed between the transformer and the compressor; The real-time collecting current value from the main power supply to the compressor during compressor operation, and then transmitting the collected current value to the control module, the control module compares the measured current value collected by the transformer with the theoretical value, according to the comparison As a result, the control module outputs a load shedding and depressing signal to the compressor to adjust and control the working load of the compressor.