US20130061610A1

US20130061610A1 - Screw Type Wind-Chilling Water Chiller Unit and Refrigeration Method Thereof

Info

Publication number: US20130061610A1
Application number: US13/265,596
Authority: US
Inventors: Ping Zhang; Bo Li; Jun Cheng; Qing Yang Li; Min Cui
Original assignee: DONGGUAN EUROKLIMAT AIR-CONDITIONING & REFRIGERATION Co Ltd
Current assignee: DONGGUAN EUROKLIMAT AIR-CONDITIONING & REFRIGERATION Co Ltd
Priority date: 2010-05-26
Filing date: 2011-05-23
Publication date: 2013-03-14
Also published as: CN101858662A; WO2011147195A1

Abstract

A screw type wind-chilling water chiller unit including a chassis and a compressor, a shell and tube heat exchanger, a fin-type heat exchanger and an expansion valve, and a control cubicle disposed on the chassis. The expansion valve is disposed between the compressor and the shell and tube heat exchanger. The shell and tube heat exchanger is provided with three tubes, a first tube connected to the compressor, a second tube is connected to a liquid storage can via the expansion valve and a transmission tube. A heat exchange tube in the fin-type heat exchanger is connected to a collection tube, and the liquid storage can is connected to the third tube, and a handle of a cubicle door of a control cubicle is connected to a power switch inside a power supply box, so as to improve the performance, operation stability, equipment safety of the unit.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a central air conditioning technology, and in particular to a screw type wind-chilling water chiller unit and its heat exchanger, and a refrigeration method thereof.
2. Background of the Invention
Due to the various advantages of central air-conditioning system, such as large power capacity, high efficiency, energy conservation and environment friendliness, superior performance, stable and reliable operations, now it has been utilized widely in big buildings, for example, restaurants, convention centers, mansions, and factories. The central air-conditioning system is mainly composed of four parts: a compressor, a condenser, an evaporator, and a restrictor. Wherein, the condenser and the evaporator are usually referred to as heat exchangers, for producing and outputting heat or refrigeration. In addition, it comprises other related auxiliary equipment, including: a chassis, for carrying and supporting the entire unit; a control cubicle, for receiving the unit control components; and a blower frame, for carrying and supporting a blower. The basic structure of the main machine is composed of the four parts connected in series to form a closed loop, namely, the compressor is connected to the condenser, the condenser is connected to an expansion valve serving as a restrictor, and the expansion valve is connected to the evaporator, and the evaporator is connected to the compressor. The operation process of the main machine is carried out in a loop as follows: compressor-condenser-expansion valve-evaporator- and back to the compressor. On a shell and tube heat exchanger is provided with two tubes, and when performing refrigeration, the refrigerant comes in from the second tube, and gas is exited from the first tube; when performing heating, gas comes in from the first tube, and liquid is exited from the second tube. However, this kind of structure often leads to the result that excessive liquid remains in the heat exchanger, as such, reducing efficiency of heat exchanger, increasing energy consumption, or even adversely affecting normal operations of the entire unit. Nevertheless, presently, the central air-conditioner unit has quite a lot of defects in its design, such as inconvenient installation, hoist and transport, strength of chassis is not strong enough, the operation stability of the unit is not sufficient, performance of the unit is not satisfactory, and high energy consumption.
Therefore, presently, the design and performance of the central air-conditioning unit is not quite satisfactory, and it has much room for improvements.

SUMMARY OF THE INVENTION

In view of the problems and shortcomings of the prior art, the present invention provides a screw type wind-chilling water chiller unit and a refrigeration method thereof, so as to overcome the drawbacks of the prior art.
A major objective of the present invention is to provide a screw type wind-chilling water chiller unit and a refrigeration method thereof, that is more convenient in installation and transport, having better performance, and more stable in operation.
In order to achieve the above-mentioned objective, the present invention, provides a screw type wind-chilling water chiller unit, comprising: a chassis, a compressor, a shell and tube heat exchanger, a fin-type heat exchanger and an expansion valve, and a control cubicle; wherein, the compressor, shell and tube heat exchanger, and the control cubicle are installed on the chassis, the expansion valve is disposed between the compressor and the shell and tube heat exchanger, the fin-type heat exchanger is provided at the upper portion of the unit, and the control cubicle is installed on a side of the unit; a first tube and a second tube is disposed on the shell and tube heat exchanger, the shell and tube heat exchanger is connected to the compressor via the first tube, the shell and tube heat exchanger is connected to the expansion valve through the second tube; wherein, the chassis is formed by longitudinal support frames and horizontal support frames, and vertical columns are provided on the longitudinal support frames, and it is characterized in that: the expansion valve is connected to a collection tube, the heat exchange tube in the fin-type heat exchanger is connected directly to the collection tube, the collection tube is connected to the liquid outlet of the liquid storage can through a dispenser head and the expansion valve in sequence, the liquid inlet of the liquid storage can is connected to a third tube of the shell and tube heat exchanger, and the third tube of the shell and tube heat exchanger is disposed at the lower portion of the second tube; and a handle of a cubicle door of the control cubicle is connected to the power switch inside the power supply box, and it is installed in such a way that, when the cubicle door is opened, the power switch is disconnected, and when the cubicle door is closed, the power switch is connected.
According to one aspect of the present invention, slant supports are provided between the longitudinal support frame and the vertical column of the chassis, the slant supports use the principle of triangle, to effectively enhance the structure strength of the chassis; and the outside of the longitudinal support frame is provided with hanging rings, to facilitate tying steel ropes or hanging hooks, to make it convenient in lifting and hoisting the unit.
According to another aspect of the present invention, line grooves are provided on the upper portion of the unit, and the power wires connecting the blower are installed in the line grooves, the wirings are arranged in a concentrated way to make the entire unit look uniform and pleasing, hereby making its maintenance easier.
According to yet another aspect of the present invention, outside the can body of the liquid storage can is provided a transparent liquid see-through tube leading to inside the can body. Through the liquid see-through tube, the amount of refrigerant remaining in the liquid storage can is able to be observed and known instantly, hereby enabling controlling operation conditions of the unit, and maintaining stable operations of the unit.
According to still another aspect of the present invention, a junction box is provided in the cubicle door of the control cubicle, and the backside and bottom side of the junction box are provided with openings, such that in installing the unit, the junction box covers the connection holes, with its bottom opening facing downward, the junction box can prevent water from getting into the control cubicle when it is raining.
The present invention also relates to a refrigeration method of a screw type wind-chilling water chiller unit, comprising the following steps: utilizing a compressor to compress the liquid refrigerant into a gas of high temperature and high pressure, then such a gas refrigerant enters into the fin-type heat exchanger, and it is condensed into a liquid refrigerant in a heat exchange tube of the fin-type heat exchanger, and then it does not flow through the capillary in the heat exchange tube, but it flows directly into a collection tube, then it exits from a liquid exit tube of the collection tube, and it finally returns to the compressor to complete a loop.
In the present invention, liquid storage can, collection tube are additionally provided to the air conditioning unit; a third tube is added to the shell and tube heat exchanger; and also slant support, hanging ring, and junction box are added to improve its performance, operation stability, equipment safety, so as to make its installation, maintenance, and transportation more convenient, that is advantageous to the promotion and application of the central air-conditioning system.
Further scope of the applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the present invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the present invention will become apparent to those skilled in the art from this detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

The related drawings in connection with the detailed description of the present invention to be made later are described briefly as follows, in which:

FIG. 1 is a perspective view of a screw type wind-chilling water chiller unit according to the present invention;

FIG. 2 is an inside view of the structure of a screw type wind-chilling water chiller unit according to the present invention;

FIG. 3 is a rear view of a screw type wind-chilling water chiller unit according to the present invention; and

FIG. 4 is a partial view of a heat exchanger according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The purpose, construction, features, functions and advantages of the present invention can be appreciated and understood more thoroughly through the following detailed description with reference to the attached drawings.
The present invention provides a screw type wind-chilling water chiller unit and a refrigeration method thereof. Refer to FIGS. 1, 2, and 3 for a perspective view, an inside view, and a rear view of a screw type wind-chilling water chiller unit according to the present invention. As shown in FIGS. 1, 2, and 3, the present invention provides a screw type wind-chilling water chiller unit, comprising: a chassis 1, a compressor 2, a shell and tube heat exchanger 3, a fin-type heat exchanger 4 and an expansion valve 7, and a control cubicle 6; wherein, the compressor 2, the shell and tube heat exchanger 3, and the control cubicle 6 are installed on the chassis 1, the expansion valve 7 is disposed between the compressor 2 and the shell and tube heat exchanger 3, the fin-type heat exchanger 4 is provided at the upper portion of the unit, and the control cubicle 6 is installed on a side of the unit; a first tube 31 and a second tube 32 is disposed on the shell and tube heat exchanger 3, the shell and tube heat exchanger 3 is connected to the compressor 2 via the first tube 31, the second tube 32 is connected to the expansion valve 7; wherein, the chassis 1 is formed by longitudinal support frames 11 and horizontal support frames 12, and a vertical column 12 is provided on the longitudinal support frame 11; the expansion valve 7 is connected to a collection tube, the heat exchange tube in the shell and tube heat exchanger 3 is connected directly to the collection tube, the collection tube is connected to the liquid inlet of the liquid storage can 8, the liquid outlet of the liquid storage can 8 is connected to the third tube 33 of the shell and tube heat exchanger 3, and the third tube 33 of the shell and tube heat exchanger 3 is disposed at the lower portion of the second tube 32; and the handle of the cubicle door of the control cubicle 6 is connected to the power switch inside the power supply box, and it is installed in such a way that, when the cubicle door is opened, the power switch is disconnected, and when the cubicle door is closed, the power switch is connected.
Slant supports 13 are provided between the longitudinal support frame 11 and the vertical column 12 of the chassis 1, the slant supports 13 uses the principle of triangle, to enhance effectively the structure strength of the chassis 1; and the outside of the longitudinal support frame 11 is provided with hanging rings 14, to facilitate tying steel ropes or hanging hooks, to facilitate lifting and hoisting the unit.
Line grooves 5 are provided on the upper portion of the unit, and the power wires connecting the blower are placed in the line grooves 5, the wirings are arranged in a concentrated way to make the entire unit look uniform and pleasing, thus making its maintenance easier.
Outside the can body of the liquid storage can 8 is provided a transparent liquid see-through tube (not shown) leading to inside the can body. Through the liquid see-through tube, the amount of refrigerant remaining in the liquid storage can 8 can be observed and known instantly, hereby enabling controlling operation conditions of the unit, and maintaining stable operations of the unit.
A junction box (not shown) is provided inside a cubicle door of a control cubicle 6, and the backside and bottom of the junction box are provided with openings, such that in installing the unit, the junction box covers the line connection holes, with its bottom opening facing downward, such that the junction box can prevent water from getting into the control cubicle when it is raining.
Refer to FIG. 4 for a partial view of a heat exchanger according to the present invention. In addition, the present invention provides a refrigeration method for a screw type wind-chilling water chiller unit, comprising the following steps: utilizing a compressor 2 to compress the liquid refrigerant into a gas of high temperature and high pressure, so that such a gas refrigerant enters into a fin-type heat exchanger 4, and is condensed into liquid refrigerant in a heat exchange tube 41 of a fin-type heat exchanger 4, thus the liquid refrigerant does not flow through the capillary 42 in the heat exchange tube 41, but it flows directly into a collection tube 9 from the heat exchange tube 41, then it exits from a liquid exit tube of the collection tube 9, and finally it returns to the compressor 2 to complete an entire loop.
The above detailed description of the preferred embodiment is intended to describe more clearly the characteristics and spirit of the present invention. However, the preferred embodiments disclosed above are not intended to be any restrictions to the scope of the present invention. Conversely, its purpose is to include the various changes and equivalent arrangements which are within the scope of the appended claims.

Claims

1. A screw type wind-chilling water chiller unit comprising: a chassis, a compressor, a shell and tube heat exchanger, a fin-type heat exchanger and an expansion valve, and a control cubicle; wherein, said compressor, said shell and tube heat exchanger, and said control cubicle are installed on said chassis, said expansion valve is disposed between said compressor and said shell and tube heat exchanger, said fin-type heat exchanger is provided at an upper portion of said unit, and said control cubicle is installed on a side of said unit; a first tube and a second tube is disposed on said shell and tube heat exchanger, said shell and tube heat exchanger is connected to said compressor via said first tube, said shell and tube heat exchanger is connected to said expansion valve through said second tube; wherein, said chassis is formed by longitudinal support frames and horizontal support frames, and vertical columns are provided on said longitudinal support frames, and it is characterized in that:

said expansion valve is connected to a collection tube, said heat exchange tube in said fin-type heat exchanger is connected directly to said collection tube, said collection tube is connected to a liquid outlet of a liquid storage can through a dispenser head and said expansion valve in sequence, a liquid inlet of said liquid storage can is connected to a third tube of said shell and tube heat exchanger, and said third tube of said shell and tube heat exchanger is disposed at lower portion of said second tube; and a handle of a cubicle door of said control cubicle is connected to a power switch inside the power supply box, and it is installed in such a way that, when said cubicle door is opened, said power switch is disconnected, and when said cubicle door is closed, said power switch is connected.

2. The screw type wind-chilling water chiller unit as claimed in claim 1, wherein a slant support is provided between said longitudinal support frame and said vertical column of said chassis; and outside of said longitudinal support frame is provided with hanging rings.

3. The screw type wind-chilling water chiller unit as claimed in claim 1, wherein line grooves are provided on an upper portion of said unit, and the power wires connecting said blower are installed in said line grooves.

4. The screw type wind-chilling water chiller unit as claimed in claim 1, wherein outside a can body of said liquid storage can is provided a transparent liquid see-through tube leading to inside said can body.

5. The screw type wind-chilling water chiller unit as claimed in claim 1, wherein a junction box is provided in said cubicle door of said control cubicle, and backside and bottom side of said junction box are provided with openings, such that in installing said unit, said junction box covers line connection holes, with its bottom opening facing downward.

6. A refrigeration method for a screw type wind-chilling water chiller unit, comprising following steps: utilizing a compressor to compress a liquid refrigerant into a gas of high temperature and high pressure, then such a gas refrigerant enters into a fin-type heat exchanger, and it is condensed into said liquid refrigerant in a heat exchange tube of said fin-type heat exchanger, and it is characterized in that: said liquid refrigerant does not flow through capillaries in said heat exchange tube, but it flows directly into a collection tube, then it exits from a liquid exit tube of said collection tube, and finally it returns to said compressor to complete a loop.