Compression condensing unit

Abstract

The invention relates to the technical field of refrigeration technologies, in particular to a compression condensing unit. The efficient compression condensing unit is a core assembly in the refrigeration technology and comprises a compressor, an oil separator, a condenser, a liquid storage device, a filter and an air supply plate heat exchanger which are connected in sequence. A bottom oil outlet end of the oil separator is communicated with an oil return port of the compressor through an electromagnetic valve to form an oil loop; a liquid path outlet of the air supplementing plate heat exchanger is communicated with the liquid outlet; the compressor is communicated with the gas inlet through the gas-liquid separator; the air supply plate heat exchanger is connected with the electronic expansion valve; a circuit control system is further assembled between the compressor and the condenser. According to the technical scheme, the problems that in the prior art, the refrigeration technology adopts a hot fluorine defrosting and parallel connection mode to achieve energy saving, the energy efficiency is poor, and the energy efficiency standard requirement of the current industry cannot be met are solved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and in particular to a compression condensing unit. Background Technology

[0002] Currently, refrigeration technology has a wide range of applications. It involves the refrigerant undergoing alternating condensation and evaporation processes. By adding a drive control board to adjust the speed of the variable frequency scroll compressor, rapid cooling with large cooling capacity can be achieved. Once the required temperature is reached, the speed is reduced to maintain the temperature, thus achieving energy savings. By adding a main control board and a gas-replenishing plate, gas can be supplied to the compressor under low-temperature conditions, further improving energy efficiency. The overall energy-saving effect can reach 50%, although this application is not currently available in the industry. This technology can be widely used in fruit and vegetable preservation and processing, low-temperature freezing and storage of meat and seafood, low-temperature gas liquefaction and separation (such as in the air separation industry and aerospace applications), low-temperature industrial chilled water, superconducting applications, infrared detection device cooling, semiconductor industry, and low-temperature biomedicine, among other fields.

[0003] Existing refrigeration technologies use hot-fluorine defrosting and parallel connection to achieve energy saving, but their energy efficiency is poor and cannot meet the requirements of the national standards GB44015 "Energy Efficiency Limits and Energy Efficiency Grades for Cold Storage Boxes and Compressed Condensing Units" and "Green Refrigeration High-Efficiency Action Plan", which came into effect on February 1, 2025. This is inconsistent with the national goals of carbon peaking and carbon neutrality.

[0004] In view of the problems existing in the above-mentioned existing technologies, it is necessary to research and design a new type of compression condensing unit to overcome the problems existing in the existing technologies. Summary of the Invention

[0005] The existing refrigeration technologies proposed above use hot fluorine defrosting and parallel connection to achieve energy saving, but the energy efficiency is poor and cannot meet the current industry requirements for energy efficiency standards. Therefore, a compression condensing unit is provided.

[0006] The technical means employed in this invention are as follows: A high-efficiency compressor-condenser unit is a core component in refrigeration technology, comprising a compressor, an oil separator, a condenser, a liquid receiver, a filter, and a gas-replenishing plate heat exchanger connected in sequence. Furthermore, the bottom oil outlet of the oil separator is connected to the oil return port of the compressor via a solenoid valve, forming an oil circuit; Furthermore, the liquid outlet of the gas-fuel heat exchanger is connected to the liquid outlet; Furthermore, the compressor is connected to the gas inlet via a gas-liquid separator; Furthermore, the air replenishment plate is connected to the electronic expansion valve; Furthermore, a circuit control system is also installed between the compressor and the condenser.

[0007] Furthermore, the electronic control system includes a main drive board and a main controller board, which are connected by a circuit. Furthermore, the main drive board is connected to the compressor's wiring terminals, and the main controller board is connected to the condenser fan motor circuit, forming an integrated circuit control system.

[0008] Furthermore, the outlet of the gas replenishment plate is connected to the electronic expansion valve, and the electronic expansion valve is connected to the gas replenishment port of the compressor, forming a gas replenishment circuit.

[0009] Furthermore, an electronic expansion valve is connected between the liquid outlet e and the liquid inlet f of the gas-replenishing plate heat exchanger; the liquid, after heat exchange, becomes subcooled, ensuring that it is a low-temperature liquid after being throttled by the electronic expansion valve, and becomes all gas after being heat-exchanged again by the gas-replenishing plate heat exchanger, thereby further improving the compressor's cooling capacity and energy efficiency.

[0010] Furthermore, the electronic expansion valve opens when the evaporation temperature is below -20°C, and heat is exchanged through the gas replenishment plate to replenish gas to the compressor.

[0011] Furthermore, the liquid inlet d of the gas exchanger is connected to the liquid receiver via a filter, and the gas outlet g is connected to the gas supply port of the compressor.

[0012] Furthermore, the compressor is a scroll compressor with a DC inverter gas injection structure.

[0013] Furthermore, the fan motor used in the condenser is a variable frequency motor.

[0014] Furthermore, the condenser is filled with HFC / HFO type refrigerant; Furthermore, HFC / HFO refrigerants include: R404A, R507A, R448A, R449A, R455A, and R454C / R290.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The present invention provides a high-efficiency compression condensing unit, which is expected to save 50% energy compared with existing compression condensing units; 2. The high-efficiency compressor-condensing unit provided by this invention meets the requirements of the policy standards of "Energy Efficiency Limits and Energy Efficiency Grades for Cold Storage Boxes and Compressor-Condensing Units", "Green Refrigeration High-Efficiency Action Plan" and "Carbon Neutrality", and has a promising market development prospect. 3. The present invention provides a high-efficiency compression condensing unit, which achieves energy saving and cost reduction compared with parallel units.

[0016] In summary, the technical solution of this invention solves the problem that the existing refrigeration technology, which uses hot fluorine defrosting and parallel connection to achieve energy saving, has poor energy efficiency and cannot meet the current industry requirements for energy efficiency standards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the connection system of the present invention.

[0019] Figure 2 This is a schematic diagram of the electrical system of the present invention. In the diagram: 1. Compressor; 2. Oil separator; 3. Condenser; 4. Liquid receiver; 5. Filter; 6. Air replenishment plate; 7. Electronic expansion valve; 8. Gas-liquid separator; 9. Solenoid valve; 10. Main drive board; 11. Main controller board. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0025] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0026] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0027] As shown in the figure, the present invention provides a high-efficiency compressor-condenser unit as the core component of a refrigeration system, including a compressor 1, an oil separator 2, a condenser 3, a liquid receiver 4, a filter 5, a gas-replenishing plate heat exchanger 6, an electronic expansion valve 7, a gas-liquid separator 8, a solenoid valve 9, a main drive board 10, and a main controller board 11 connected in sequence. The outlet c of oil separator 2 is connected to the oil return port of compressor 1 through a solenoid valve, forming a circuit for refrigeration oil. The outlet of the liquid reservoir 4 is connected to the liquid inlet d of the gas replenishment plate 6. The liquid outlet of the gas replenishment plate 6 is divided into two paths. One path is connected to the inlet f of the gas replenishment plate 6 through the electronic expansion valve 7. The gas outlet g of the gas replenishment plate 6 is connected to the gas replenishment port of the compressor 1, forming a gas replenishment circuit.

[0028] The refrigerant is an HFC / HFO type refrigerant.

[0029] like Figure 2 As shown, the present invention provides a high-efficiency compressor-condenser unit as the core component of a refrigeration system, including a compressor 1, a condenser 3, a main drive board 10, and a main controller board 11 connected in sequence. The compressor 1 is connected to the main drive board 10, the main drive board 10 is connected to the main control board 11, and the main control board 11 is connected to the condenser 3 circuit, forming a controllable circuit.

[0030] The refrigerant is an HFC / HFO type refrigerant; HFC / HFO type refrigerants include: R404A, R507A, R448A, R449A, R455A, R454C / R290.

[0031] Besides being used in refrigeration and cold storage facilities, refrigeration cycle systems can also be used in low-temperature environmental test chambers, low-temperature oil baths and water baths, etc.

[0032] In use: A high-efficiency compressor-condenser unit achieves rapid cooling by adjusting the speed of compressor 1. When the required temperature is reached, the speed is reduced to a low level to maintain cooling capacity, achieving energy savings of up to 30%. As the evaporation temperature gradually decreases, the difference between the high pressure and the lower pressure of compressor 1 gradually increases, the amount of refrigerant circulating decreases, the motor of compressor 1 heats up, and the temperature inside the scroll plate cavity rises rapidly, leading to damage to the structure of compressor 1 components and carbonization of the refrigerant oil, causing compressor 1 to malfunction. This invention ensures that the temperature inside compressor 1 is maintained within a controllable range by injecting gaseous refrigerant into the cavity of compressor 1, guaranteeing reliable compressor operation and improving energy efficiency by up to 30%. In summary, this high-efficiency compressor-condenser unit is expected to save 50% of energy.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-efficiency compression condensing unit, characterized in that: The high-efficiency compressor-condenser unit is a core component in refrigeration technology, including a compressor (1), an oil separator (2), a condenser (3), a liquid receiver (4), a filter (5), and a gas-replenishing plate heat exchanger (6) connected in sequence. The bottom oil outlet of the oil separator (2) is connected to the oil return port of the compressor (1) through a solenoid valve (9) to form an oil circuit; The liquid outlet of the gas-replenishing plate heat exchanger (6) is connected to the liquid outlet; The compressor (1) is connected to the gas inlet via a gas-liquid separator (8); The aforementioned air replenishment plate (6) is connected to the electronic expansion valve (7); A circuit control system is also installed between the compressor (1) and the condenser (3).

2. The high-efficiency compression condensing unit according to claim 1, characterized in that: The electronic control system includes a main drive board (10) and a main controller board (11), which are connected by a circuit. The main drive board (10) and the compressor (1) are connected to each other at their terminals, and the main controller board (11) and the condenser (3) fan motor circuit are connected to each other to form an overall circuit control system.

3. The high-efficiency compression condensing unit according to claim 1, characterized in that: The outlet of the gas replenishment plate (6) is connected to the electronic expansion valve (7), and the electronic expansion valve (7) is connected to the gas replenishment port of the compressor (1) to form a gas replenishment circuit.

4. The high-efficiency compression condensing unit according to claim 1, characterized in that: An electronic expansion valve (7) is connected between the liquid outlet e and the liquid inlet f of the gas-replenishing plate heat exchanger (6); the liquid that has been heated by heat exchange is now subcooled, and after being blocked by the electronic expansion valve (7), it becomes a low-temperature liquid. After being heated by the gas-replenishing plate heat exchanger (6) again, it becomes a gas, thereby further improving the cooling capacity and energy efficiency of the compressor. The electronic expansion valve (7) opens when the evaporation temperature is below -20°C, and heat is exchanged through the gas replenishment plate (6) to replenish gas to the compressor (1).

5. The high-efficiency compression condensing unit according to claim 1, characterized in that: The liquid inlet d of the gas exchanger (6) is connected to the liquid reservoir (4) through the filter (5), and the gas outlet g is connected to the gas supply port of the compressor (1).

6. The high-efficiency compression condensing unit according to claim 1, characterized in that: The compressor (1) is a scroll compressor with a DC inverter gas supply structure.

7. The high-efficiency compression condensing unit according to claim 1, characterized in that: The fan motor used in the condenser (3) is a variable frequency motor.

8. The high-efficiency compression condensing unit according to claim 1, characterized in that: The condenser (3) is filled with HFC / HFO type refrigerant; The HFC / HFO type refrigerants include: R404A, R507A, R448A, R449A, R455A, and R454C / R290.

Images