Efficient heat exchange environment-friendly low-temperature water chilling unit

Abstract

The utility model belongs to the technical field of heat exchange units, and particularly relates to an efficient heat exchange environment-friendly low-temperature water chilling unit which comprises a compressor, a condenser, an evaporator, an expansion valve and a control system, the condenser and the evaporator both adopt micro-channel heat exchangers, and flow channels of the micro-channel heat exchangers are designed to be of a porous structure; the control system comprises a temperature sensor, a pressure sensor and a PLC, the temperature sensor and the pressure sensor are arranged at an inlet and an outlet of the condenser and an inlet and an outlet of the evaporator respectively, and the PLC is electrically connected with the compressor, the expansion valve, the temperature sensor and the pressure sensor. According to the utility model, the frequency conversion technology and the intelligent control system cooperate to realize dynamic optimization of operation parameters of the unit, effectively reduce energy consumption and avoid energy waste. The heat recovery device efficiently recovers heat discharged by the condenser for hot water supply or space heating, and the function application range of the unit is widened.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to an environmentally friendly low-temperature chiller unit with high-efficiency heat exchange. Background Technology

[0002] Low-temperature chillers are widely used in industrial refrigeration, food processing, and pharmaceutical storage. Traditional low-temperature chillers suffer from low heat exchange efficiency, high energy consumption, and poor environmental performance, especially under low-temperature conditions where the heat exchanger's performance often fails to meet the demands of high-efficiency refrigeration. Furthermore, traditional refrigerants have a significant environmental impact, failing to meet current green and environmentally friendly requirements. Therefore, there is a need to develop an environmentally friendly low-temperature chiller with high-efficiency heat exchange. Utility Model Content

[0003] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0004] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0005] An environmentally friendly low-temperature chiller unit with high-efficiency heat exchange includes a compressor, a condenser, an evaporator, an expansion valve, and a control system. Both the condenser and the evaporator adopt microchannel heat exchangers, and the flow channels of the microchannel heat exchangers are designed with a porous structure.

[0006] The control system includes a temperature sensor, a pressure sensor, and a PLC controller. The temperature sensor and pressure sensor are respectively installed at the inlet and outlet of the condenser and the evaporator. The PLC controller is electrically connected to the compressor, the expansion valve, the temperature sensor, and the pressure sensor.

[0007] The unit is also equipped with a heat recovery device, which is connected to the outlet of the condenser. The heat recovery device includes a heat exchanger and a circulating pump. One side of the heat exchanger is connected to the outlet of the condenser, and the other side is connected to the heating device.

[0008] The compressor's suction port is connected to the evaporator's outlet via a pipe, the compressor's discharge port is connected to the condenser's inlet via a pipe, and the condenser's outlet is connected to the expansion valve and the evaporator's inlet via pipes in sequence; the unit uses an environmentally friendly refrigerant.

[0009] As a preferred embodiment of the high-efficiency heat exchange environmentally friendly low-temperature chiller unit described in this utility model, the environmentally friendly refrigerant is one or more of R, R, or R.

[0010] As a preferred embodiment of the high-efficiency heat exchange environmentally friendly low-temperature chiller unit described in this utility model, the porous structure has circular, elliptical, or polygonal channel shapes.

[0011] As a preferred embodiment of the high-efficiency heat exchange environmentally friendly low-temperature chiller unit described in this utility model, the compressor is a variable frequency compressor, and the frequency adjustment range of the variable frequency compressor is -Hz.

[0012] As a preferred embodiment of the environmentally friendly low-temperature chiller unit with high-efficiency heat exchange described in this utility model, the heat exchanger is a plate heat exchanger or a shell-and-tube heat exchanger.

[0013] As a preferred embodiment of the high-efficiency heat exchange environmentally friendly low-temperature chiller unit described in this utility model, the unit further includes a filter and a dryer. The filter is installed on the pipeline between the condenser and the expansion valve, and the dryer is installed on the pipeline between the expansion valve and the evaporator.

[0014] The beneficial effects of this invention are as follows: The porous structure design of the microchannel heat exchanger significantly improves heat exchange efficiency, especially under low-temperature conditions, breaking through the performance bottleneck of traditional units in low-temperature environments. The application of environmentally friendly refrigerant greatly reduces the environmental impact; its Global Warming Potential (GWP) and Ozone Depletion Potential (ODP) are significantly lower than those of traditional refrigerants, meeting green environmental protection requirements.

[0015] The synergistic effect of variable frequency technology and intelligent control system enables dynamic optimization of unit operating parameters, effectively reducing energy consumption and avoiding energy waste. The heat recovery device efficiently recovers heat discharged from the condenser for hot water supply or space heating, broadening the unit's functional application range.

[0016] High-precision sensors work in conjunction with a PLC controller to accurately monitor and control the unit's operating status, ensuring stable system operation and maintaining high efficiency. The unit features a compact structure, convenient maintenance, and is suitable for various scenarios, offering both economic and environmental benefits, and providing an innovative, energy-efficient solution for the industrial refrigeration field. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the porous structure of the microchannel heat exchanger of this utility model. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] Please see Figures 1-2 The diagram shown is a structural schematic of an embodiment of an environmentally friendly low-temperature chiller unit with high-efficiency heat exchange according to this utility model. Please refer to [link / reference]. Figures 1-2 This paper provides a detailed introduction to an environmentally friendly low-temperature chiller unit with high-efficiency heat exchange.

[0025] An environmentally friendly low-temperature chiller unit with high-efficiency heat exchange includes a compressor 100, a condenser 101, an evaporator 102, an expansion valve 103, and a control system. Both the condenser 101 and the evaporator 102 adopt microchannel heat exchangers 105, and the flow channels of the microchannel heat exchangers 105 are designed as porous structures 106.

[0026] The control system includes a temperature sensor 108, a pressure sensor 109, and a PLC controller 110. The temperature sensor 108 and the pressure sensor 109 are respectively installed at the inlet and outlet of the condenser 101 and the evaporator 102. The PLC controller 110 is electrically connected to the compressor 100, the expansion valve 103, the temperature sensor 108, and the pressure sensor 109.

[0027] The unit is also equipped with a heat recovery device 111, which is connected to the outlet of the condenser 101. The heat recovery device 111 includes a heat exchanger 112 and a circulating pump 113. One side of the heat exchanger 112 is connected to the outlet of the condenser 101, and the other side is connected to the heating device.

[0028] The suction port of the compressor 100 is connected to the outlet of the evaporator 102 via a pipe, and the discharge port of the compressor 100 is connected to the inlet of the condenser 101 via a pipe. The outlet of the condenser 101 is connected to the expansion valve 103 and the inlet of the evaporator 102 in sequence via pipes. The unit uses an environmentally friendly refrigerant. A microchannel heat exchanger 105 is used, and its porous structure 106 design increases the turbulence effect of the fluid, significantly improving heat exchange efficiency, especially under low-temperature conditions. The use of an environmentally friendly refrigerant reduces the unit's energy consumption and environmental impact. The intelligent control system monitors and automatically adjusts in real time, improving operating efficiency. The heat recovery device 111 recovers and utilizes the heat discharged from the condenser 101, improving energy utilization.

[0029] Furthermore, the environmentally friendly refrigerant is one or more of R32, R290, or R744.

[0030] Furthermore, the porous structure 106 has pores in the shape of a circle 202, an ellipse 203, or a polygon 204. Different pore shapes can be selected according to different fluid characteristics and heat exchange requirements to further optimize the heat exchange effect.

[0031] Furthermore, the compressor 100 is a variable frequency compressor, and the frequency adjustment range of the variable frequency compressor is 10-100Hz. The frequency adjustment range of the variable frequency compressor is 10-100Hz, which can more accurately control the operating speed of the compressor 100, meet the cooling needs under different operating conditions, and improve energy utilization efficiency.

[0032] Furthermore, the heat exchanger 112 is either a plate heat exchanger or a shell-and-tube heat exchanger. Both types of heat exchangers have high heat exchange efficiency and reliability, and can be selected according to different application scenarios and space requirements, thereby improving the applicability of the heat recovery device.

[0033] Furthermore, the unit also includes a filter 115 and a dryer 116. The filter 115 is installed on the pipe between the condenser 101 and the expansion valve 103, and the dryer 116 is installed on the pipe between the expansion valve 103 and the evaporator 102. The filter 115 can filter impurities in the refrigerant, preventing pipe blockage and equipment damage; the dryer 116 can absorb moisture in the refrigerant, avoiding adverse effects of moisture on the normal operation of the unit and ensuring stable operation and service life of the unit.

[0034] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-efficiency, environmentally friendly low-temperature chiller unit with efficient heat exchange, characterized in that, It includes a compressor (100), a condenser (101), an evaporator (102), an expansion valve (103), and a control system. The condenser (101) and the evaporator (102) both adopt microchannel heat exchangers (105), and the flow channels of the microchannel heat exchangers (105) are designed as porous structures (106). The control system includes a temperature sensor (108), a pressure sensor (109), and a PLC controller (110). The temperature sensor (108) and the pressure sensor (109) are respectively installed at the inlet and outlet of the condenser (101) and the evaporator (102). The PLC controller (110) is electrically connected to the compressor (100), the expansion valve (103), the temperature sensor (108), and the pressure sensor (109). The unit is also equipped with a heat recovery device (111), which is connected to the outlet of the condenser (101). The heat recovery device (111) includes a heat exchanger (112) and a circulating pump (113). One side of the heat exchanger (112) is connected to the outlet of the condenser (101), and the other side is connected to the heating device. The compressor (100) has its suction port connected to the outlet of the evaporator (102) via a pipe, and its discharge port connected to the inlet of the condenser (101) via a pipe. The outlet of the condenser (101) is connected to the expansion valve (103) and the inlet of the evaporator (102) in sequence via pipes. The unit uses an environmentally friendly refrigerant.

2. The environmentally friendly low-temperature chiller unit with high-efficiency heat exchange according to claim 1, characterized in that, The environmentally friendly refrigerant is one or more of R32, R290, or R744.

3. The environmentally friendly low-temperature chiller unit with high-efficiency heat exchange according to claim 1, characterized in that, The porous structure (106) has a channel shape that is circular (202), elliptical (203), or polygonal (204).

4. The environmentally friendly low-temperature chiller unit with high-efficiency heat exchange according to claim 1, characterized in that, The compressor (100) is a variable frequency compressor, and the frequency adjustment range of the variable frequency compressor is 10-100Hz.

5. The environmentally friendly low-temperature chiller unit with high-efficiency heat exchange according to claim 1, characterized in that, The heat exchanger (112) is a plate heat exchanger or a shell-and-tube heat exchanger.

6. The environmentally friendly low-temperature chiller unit with high-efficiency heat exchange according to claim 1, characterized in that, The unit also includes a filter (115) and a dryer (116), the filter (115) being installed on the pipe between the condenser (101) and the expansion valve (103), and the dryer (116) being installed on the pipe between the expansion valve (103) and the evaporator (102).

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