Local circulation type refrigerating unit
By using the heat exchange design of air-cooled copper pipes and low-temperature copper pipes in local circulation refrigeration units, the problem of low refrigeration efficiency in high-temperature environments in traditional refrigeration units is solved, and a more efficient refrigeration effect is achieved.
Patent Information
- Application Number
- CN202421634088.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-10
AI Technical Summary
In the high-temperature environment in summer, traditional refrigeration units have low refrigeration efficiency and are difficult to effectively cool down.
A local circulation refrigeration unit is adopted to operate a high-temperature refrigerant to be condensed in an air-cooled copper tube and a low-temperature liquid is operated in a low-temperature copper tube. The two liquids are separated by a copper wall to achieve heat exchange.
It effectively reduces the condensation temperature, brings it closer to or even lower than the ambient temperature, improves the refrigeration efficiency, and solves the problem of low refrigeration efficiency at high temperatures in summer.
Smart Images
Figure CN222881412U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of refrigeration equipment, in particular to a local circulation type refrigeration unit. Background Art
[0002] Traditional refrigeration units use a heat exchanger to cool down the high-temperature refrigerant. During the high temperatures of summer, the refrigeration efficiency is low in some high-temperature environments. Utility Model Content
[0003] The utility model aims to propose a local circulation refrigeration unit which makes the high-temperature refrigerant to be condensed run in an air-cooled copper tube, the low-temperature liquid run in a low-temperature copper tube, the refrigerant to be condensed and the low-temperature liquid are separated by a layer of copper wall, and the two liquids can exchange heat well.
[0004] The utility model specifically adopts the following technical solutions:
[0005] A local circulation refrigeration unit includes a condensing motor, a main unit and a local circulation condenser. The local circulation condenser includes an air-cooling copper tube arranged inside a fin. A low-temperature copper tube is arranged inside the cavity of the air-cooling copper tube. The air-cooling copper tube and the low-temperature copper tube are distributed in an S shape inside the fin. The end of the air-cooling copper tube is an air-cooling pipe elbow, and the end of the low-temperature copper tube is a low-temperature pipe elbow.
[0006] Preferably, a first air-cooling end plate and a first fin end plate are provided at one end of the fin, and a second air-cooling end plate and a second fin end plate are provided at the other end.
[0007] Preferably, a liquid distribution pipe, a connecting pipe and an air collecting pipe are provided inside the first air-cooling end plate.
[0008] Preferably, an expansion valve is provided in the low-temperature liquid inlet of the low-temperature copper tube.
[0009] Preferably, the central axes of the air-cooled copper tube and the low-temperature copper tube coincide with each other.
[0010] Preferably, the inlet of the air-cooled copper tube located at the upper part is the high-temperature refrigerant inlet, the outlet of the air-cooled copper tube located at the lower part is the condensed refrigerant outlet, the port of the low-temperature copper tube corresponding to the high-temperature refrigerant inlet is the low-temperature refrigerant outlet, and the port of the low-temperature copper tube corresponding to the condensed refrigerant outlet is the inlet of the expanded low-temperature refrigerant.
[0011] The utility model has the following beneficial effects:
[0012] The low-temperature refrigerant comes from the liquid storage tank of the unit. Before entering the local circulation type condenser, it is forced to be throttled by the expansion valve to become low-temperature refrigerant, cooling the high-temperature uncondensed refrigerant on the other side to reach the pressure and temperature required for the normal operation of the refrigeration system;
[0013] Intelligent control can be performed according to the ambient temperature or liquid supply temperature to effectively solve the problem of high temperature in summer, but a small amount of cooling capacity will be lost; the condensing temperature of the refrigeration unit can be made close to or even lower than the ambient temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a front view of a local circulation refrigeration unit;
[0015] Figure 2 It is a schematic diagram of the structure of a local circulation condenser;
[0016] Figure 3 This is the left view of the first air-cooling end plate;
[0017] Figure 4 This is a schematic diagram of the refrigeration cycle of a local circulation refrigeration unit.
[0018] Among them, 1 is the low-temperature gaseous refrigerant outlet, 2 is the high-temperature refrigerant inlet, 3 is the first air-cooled end plate, 4 is the first fin end plate, 5 is the fin, 6 is the air-cooled copper tube, 7 is the low-temperature copper tube, 8 is the second fin end plate, 9 is the second air-cooled end plate, 10 is the air-cooled pipe elbow, 11 is the low-temperature pipe elbow, 12 is the condensed refrigerant outlet, 13 is the expanded low-temperature refrigerant inlet, 14 is the condenser placement area, 15 is the liquid distribution pipe, 16 is the connecting pipe, 17 is the gas collecting pipe, 18 is the condensing motor, 19 is the expansion valve, and 20 is the pipeline with a local refrigeration cycle. DETAILED DESCRIPTION
[0019] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments:
[0020] Combination Figure 1-Figure 3 A local circulation refrigeration unit includes a condensing motor 18, a main unit and a local circulation condenser. The local circulation condenser includes an air-cooled copper tube 6 arranged inside a fin. A low-temperature copper tube 7 is arranged in the cavity of the air-cooled copper tube 6. The air-cooled copper tube 6 and the low-temperature copper tube 7 are distributed in an S shape in the fin. The central axes of the air-cooled copper tube 6 and the low-temperature copper tube 7 coincide. The end of the cold copper tube 6 is an air-cooled pipe elbow 10, and the end of the low-temperature copper tube is a low-temperature pipe elbow 11.
[0021] One end of the fin is provided with a first air-cooling end plate 3 and a first fin end plate 4 , and the other end is provided with a second air-cooling end plate 9 and a second fin end plate 8 .
[0022] A liquid distribution pipe 15 , a connecting pipe 16 and an air collecting pipe 17 are provided inside the first air-cooling end plate.
[0023] An expansion valve 19 is provided in the low-temperature liquid inlet of the low-temperature copper tube 7 .
[0024] The inlet of the air-cooled copper tube located at the upper part is the high-temperature refrigerant inlet 2, the outlet of the air-cooled copper tube located at the lower part is the condensed refrigerant outlet 12, the port of the low-temperature copper tube corresponding to the high-temperature refrigerant inlet 12 is the low-temperature refrigerant outlet 12, and the port of the low-temperature copper tube corresponding to the condensed refrigerant outlet is the expanded low-temperature refrigerant inlet 13.
[0025] Combination Figure 4 The working principle of a local circulation refrigeration unit is that the refrigerant becomes high-temperature refrigerant gas after passing through the refrigeration compressor of the local circulation refrigeration unit. The high-temperature refrigerant gas passes through the high-temperature oil separator and enters the air-cooled copper tube of the local circulation condenser through the high-temperature refrigerant inlet. At the same time, the refrigerant in the liquid storage tank becomes low-temperature refrigerant liquid after expansion, and enters the low-temperature copper tube from the low-temperature refrigerant inlet. The high-temperature refrigerant in the air-cooled copper tube exchanges heat with the low-temperature refrigerant in the low-temperature copper tube. At the same time, the high-temperature refrigerant exchanges heat with the air through the fins, thus ensuring that the unit will not shut down due to high pressure. After the low-temperature refrigerant liquid entering the low-temperature copper tube completes the heat exchange with the high-temperature refrigerant in the air-cooled copper tube, the low-temperature refrigerant liquid becomes low-temperature refrigerant gas. This low-temperature refrigerant gas is connected to the gas-liquid separator of the unit and participates in the refrigeration cycle; the high-temperature refrigerant gas completes condensation and becomes high-temperature refrigerant liquid and enters the liquid storage tank.
[0026] In addition, the above structure can be used as an air-cooled dual-purpose condensing refrigeration unit. The expanded low-temperature refrigerant inlet is connected to an external water source (cooling water tower, tap water, defrost water, etc.), and the liquid flowing in the low-temperature refrigerant pipeline becomes water. The high-temperature refrigerant in the air-cooled copper tube and the water in the low-temperature copper tube exchange heat.
[0027] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A local circulation type refrigeration unit, comprising a condensing motor, a main unit and a local circulation type condenser, characterized in that: The local circulation condenser includes an air-cooled copper tube arranged inside the fin, a low-temperature copper tube is arranged in the cavity of the air-cooled copper tube, the air-cooled copper tube and the low-temperature copper tube are distributed in an S shape in the fin, the end of the air-cooled copper tube is an air-cooled pipe elbow, and the end of the low-temperature copper tube is a low-temperature pipe elbow.
2. A local circulation refrigeration unit according to claim 1, characterized in that: One end of the fin is provided with a first air-cooling end plate and a first fin end plate, and the other end is provided with a second air-cooling end plate and a second fin end plate.
3. A local circulation refrigeration unit as claimed in claim 2, characterized in that: A liquid distribution pipe, a connecting pipe and an air collecting pipe are arranged inside the first air-cooling end plate.
4. A local circulation refrigeration unit as claimed in claim 1, characterized in that: An expansion valve is provided in the cryogenic liquid inlet of the cryogenic copper tube.
5. A local circulation refrigeration unit as claimed in claim 1, characterized in that: The central axes of the air-cooled copper tube and the low-temperature copper tube coincide.
6. A local circulation refrigeration unit as claimed in claim 1, characterized in that: The inlet of the air-cooling copper tube located at the upper part is the high-temperature refrigerant inlet, the outlet of the air-cooling copper tube located at the lower part is the condensing refrigerant outlet, the port of the low-temperature copper tube corresponding to the high-temperature refrigerant inlet is the low-temperature refrigerant outlet, and the port of the low-temperature copper tube corresponding to the condensing refrigerant outlet is the inlet of the expanded low-temperature refrigerant.