CN-122015346-A - Heat exchanger group and refrigerating system

Abstract

The application provides a heat exchanger group and a refrigerating system with the heat exchanger group, the heat exchanger group comprises a first heat exchanger with a first heat exchanger primary side and a first heat exchanger secondary side, and a second heat exchanger having a second heat exchanger primary side and a second heat exchanger secondary side. The primary side outlet of the first heat exchanger is connected with the primary side inlet of the second heat exchanger, the secondary side inlet pipeline of the second heat exchanger is connected with the secondary side inlet pipeline of the first heat exchanger, and the secondary side outlet pipeline of the second heat exchanger is connected with the secondary side outlet of the first heat exchanger, so that the temperature of primary side medium flowing out of the heat exchanger group is further reduced, the integral temperature of secondary side medium flowing into the secondary side of the first heat exchanger is increased, the heat exchange requirement of the first heat exchanger is reduced, the filling quantity of primary side medium is reduced while the heat exchange efficiency is further improved, and the cost of the heat exchanger is reduced.

Inventors

• HU YONGLIANG
• PING YAQIN
• LI SENLIN

Assignees

• 开利公司

Dates

Publication Date

20260512

Application Date

20250120

Priority Date

20241112

Claims (11)

1. 1. A heat exchanger set, comprising: the first heat exchanger is provided with a first heat exchanger primary side and a first heat exchanger secondary side; The secondary side inlet pipeline of the first heat exchanger is connected with the first heat exchanger through an inlet of the secondary side of the first heat exchanger; The second heat exchanger is provided with a second heat exchanger primary side and a second heat exchanger secondary side; One end of the primary side inlet pipeline of the second heat exchanger is connected to the outlet of the primary side of the first heat exchanger, and the other end of the primary side inlet pipeline of the second heat exchanger is connected to the inlet of the primary side of the second heat exchanger; One end of the second heat exchanger secondary side inlet pipeline is connected to the first heat exchanger secondary side inlet pipeline, and the other end of the second heat exchanger secondary side inlet pipeline is connected to an inlet of the second heat exchanger secondary side; and one end of the second heat exchanger secondary side outlet pipeline is connected to the inlet of the first heat exchanger secondary side, and the other end of the second heat exchanger secondary side outlet pipeline is connected to the outlet of the second heat exchanger secondary side.
2. 2. A heat exchanger set according to claim 1, wherein, The water pump is arranged on the secondary side inlet pipeline of the second heat exchanger or the secondary side outlet pipeline of the second heat exchanger.
3. 3. A heat exchanger set as claimed in claim 2, wherein, The medium in the primary side of the first heat exchanger flows in reverse with the medium in the secondary side of the first heat exchanger; the medium in the primary side of the second heat exchanger flows counter to the medium in the secondary side of the second heat exchanger.
4. 4. A heat exchanger set according to claim 3, wherein, The medium in the primary side of the first heat exchanger and the primary side of the second heat exchanger is a refrigerant; The medium in the secondary side of the first heat exchanger and the secondary side of the second heat exchanger is water.
5. 5. The heat exchanger package according to claim 4, wherein the medium in the primary side of the first heat exchanger and the primary side of the second heat exchanger is a low GWP refrigerant selected from any of R515B, R a or R1234 ze.
6. 6. A heat exchanger set as claimed in claim 5, wherein, The first heat exchanger is a flooded heat exchanger; The second heat exchanger is a plate heat exchanger.
7. 7. The heat exchanger set of claim 6, further comprising, A primary side outlet pipeline of the second heat exchanger is connected with the second heat exchanger through an outlet of the primary side of the second heat exchanger, The medium flowing out of the primary side outlet pipeline of the second heat exchanger is in a saturated liquid state.
8. 8. The heat exchanger set of claim 7, wherein the water flow rate through the water pump is less than 80% of the total water flow rate through the inlet on the secondary side of the first heat exchanger.
9. 9. A heat exchanger set according to claim 1, wherein the first heat exchanger has a first heat exchanger secondary side first inlet and a first heat exchanger secondary side second inlet, The secondary side inlet pipeline of the first heat exchanger is connected with the secondary side first inlet of the first heat exchanger; and the secondary side outlet pipeline of the second heat exchanger is connected with the secondary side second inlet of the first heat exchanger.
10. 10. A heat exchanger set as claimed in claim 9, wherein, The first inlet of the secondary side of the first heat exchanger is arranged at one end of the first heat exchanger corresponding to the outlet of the secondary side of the first heat exchanger; the second inlet of the secondary side of the first heat exchanger is arranged at the other end of the first heat exchanger.
11. 11. A refrigerating system comprises a compressor, a condenser, a subcooler, an expansion valve and an evaporator which are sequentially connected by refrigerant pipelines, and is characterized in that, The connection relationship between the condenser and the subcooler constitutes a heat exchanger set as claimed in any one of claims 1 to 10, wherein the condenser is the first heat exchanger and the subcooler is the second heat exchanger.

Description

Heat exchanger group and refrigerating system The present application claims priority from chinese patent application 202411611845.4, and all that is described in chinese patent application 202411611845.4 is incorporated herein by reference. Technical Field The application relates to the technical field of refrigeration/cooling equipment, in particular to a heat exchanger group and a refrigeration system using the heat exchanger group. Background The low GWP refrigerant has a lower global warming potential than conventional refrigerants, has less impact on climate warming, and most of the low GWP refrigerant has no damaging effect on the ozone layer. Considering the influence of the traditional refrigerant on the environment, the use of a more environment-friendly low GWP refrigerant gradually becomes a preferred scheme of a refrigerating system, and the refrigerating industry is promoted to develop towards a greener and sustainable direction. However, low GWP refrigerants are generally more expensive than traditional refrigerants, increasing the initial investment costs of the refrigeration system. In the prior art, for a water chilling unit or a heat pump unit adopting a flooded condenser, when the temperature rise of cooling water in the condenser reaches 10-40K, the required supercooling area is larger for achieving the best unit performance, and the refrigerant in the traditional supercooler may account for a larger proportion of the total filling amount of the refrigerant in the condenser, so that the amount of low GWP refrigerant to be filled is larger. Meanwhile, considering that the water entering the condenser exchanges heat with the refrigerant in the copper pipe, more copper pipes of the heat exchanger are needed to increase the heat exchange area in the condenser, and the cost is high. Disclosure of Invention The present application is directed to a heat exchanger package, and a refrigeration system employing the same, that address or alleviate at least some of the problems of the prior art. The application provides a heat exchanger group which comprises a first heat exchanger with a first heat exchanger primary side and a first heat exchanger secondary side, a first heat exchanger secondary side inlet pipeline connected with the first heat exchanger through an inlet of the first heat exchanger secondary side, a second heat exchanger with a second heat exchanger primary side and a second heat exchanger secondary side, a second heat exchanger primary side inlet pipeline with one end connected to an outlet of the first heat exchanger primary side and the other end connected to an inlet of the second heat exchanger primary side, a second heat exchanger secondary side inlet pipeline with one end connected to the first heat exchanger secondary side inlet pipeline and the other end connected to an inlet of the second heat exchanger secondary side, and a second heat exchanger secondary side outlet pipeline with one end connected to an inlet of the first heat exchanger secondary side and the other end connected to an outlet of the second heat exchanger secondary side. In an alternative technical scheme, the heat exchanger group further comprises a water pump arranged on the secondary side inlet pipeline or the secondary side outlet pipeline of the second heat exchanger. In an alternative solution, the medium in the primary side of the first heat exchanger flows counter-current to the medium in the secondary side of the first heat exchanger, and the medium in the primary side of the second heat exchanger flows counter-current to the medium in the secondary side of the second heat exchanger. In an alternative technical scheme, the media in the primary side of the first heat exchanger and the primary side of the second heat exchanger are refrigerants, and the media in the secondary side of the first heat exchanger and the secondary side of the second heat exchanger are water. In an alternative embodiment, the medium in the primary side of the first heat exchanger and the primary side of the second heat exchanger is a low GWP refrigerant selected from any of R515B, R a or R1234 ze. In an alternative technical scheme, the first heat exchanger is a flooded heat exchanger, and the second heat exchanger is a plate heat exchanger. In an alternative technical scheme, the heat exchanger group further comprises a primary side outlet pipeline of the second heat exchanger, wherein the primary side outlet pipeline of the second heat exchanger is connected with the outlet of the primary side of the second heat exchanger, and the medium flowing out of the primary side outlet pipeline of the second heat exchanger is in a saturated liquid state. In an alternative solution, the water flow rate of the water pump is less than 80% of the total water flow rate of the inlet through the secondary side of the first heat exchanger. In an alternative technical scheme, the first heat exchanger is provided with a first heat exchange