CN209672622U - A kind of big temperature difference cooling system of oil inlet and outlet - Google Patents

Abstract

The utility model discloses a cooling system with a large temperature difference between oil inlet and outlet, which includes a compressor, a condenser, an evaporator, and a secondary heat exchanger and a water bucket. The compressor, the condenser and the evaporator are connected in series by setting pipelines, and To form a cycle, the evaporator, bucket and secondary heat exchanger are connected in series by setting pipes and water pumps to form a cycle. The water pump draws water from the bucket and sends it to the secondary heat exchanger, and then discharges it from the outlet of the secondary heat exchanger. In the evaporator, two independent airtight channels are set in the evaporator, one airtight channel is used for the flow channel of water, and the other airtight channel is used for the flow channel of refrigerant liquid, and two airtight channels are also set in the secondary heat exchanger. an independent closed channel. The utility model forms a water circulation system with a stable flow rate by setting a water pump, a secondary heat exchanger, an evaporator, and a bucket, which can ensure a large range of changes in the flow rate of the cooled liquid without affecting the normal operation of the refrigeration system.

Description

A cooling system with large temperature difference between inlet and outlet

technical field

The utility model relates to the technical field of refrigeration, in particular to a cooling system with large temperature difference between oil inlet and outlet.

Background technique

The existing cooling scheme for the cooled oil: the problems of using an air-conditioning refrigeration unit to cool the oil are as follows: ①The temperature difference between the inlet and outlet of the oil is generally about 5°C. ② If the evaporator of the refrigeration system is too large, the temperature difference between the oil inlet and outlet will increase, but the operation of the refrigeration system is unstable, which will cause frosting on the compressor and low pressure on the compressor. ③ It cannot meet the temperature control requirements of large flow oil. ④The change of the flow rate of the cooled medium shall not exceed 15%, otherwise it will also lead to unstable operation of the refrigeration system.

Utility model content

The purpose of the utility model is to provide a cooling system with a large temperature difference between the oil inlet and outlet for the defects and deficiencies of the prior art.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a cooling system with a large temperature difference between the oil inlet and outlet, including a compressor, a condenser, and an evaporator. The innovation point is that it also includes a secondary heat exchanger and a water bucket. The compressor, condenser and evaporator are connected in series by setting pipelines to form a circulation, and the evaporator, water bucket and secondary heat exchanger are connected in series by setting pipelines and water pumps to form a circulation, and the water pump draws water from the water bucket After being sent to the secondary heat exchanger, it is discharged into the evaporator from the outlet of the secondary heat exchanger. Two independent closed channels are set in the evaporator, one of which is used for water flow, and the other One closed channel is used for the flow channel of the refrigerant liquid, and two independent closed channels are also arranged in the secondary heat exchanger, one of which is used for the flow channel of water, and the other is used for the hot liquid the runner.

Further, a liquid receiver, a filter and a throttling assembly are arranged between the condenser and the evaporator.

Further, a condensing fan is also included, and the condensing fan is air-cooled against the condenser.

After adopting the above structure, the beneficial effects of the utility model are as follows:

The utility model forms a water circulation system with a stable flow rate by setting a water pump, a secondary heat exchanger, an evaporator, and a bucket, which can ensure a large range of changes in the flow rate of the cooled liquid without affecting the normal operation of the refrigeration system; choose a suitable refrigeration system, Secondary heat exchange (when the cooling capacity is greater than 50% of the calorific value, and the area of the secondary heat exchanger is greater than 100% of the ordinary heat exchange area), it can control the relatively constant outlet temperature of the cooled medium.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Explanation of reference signs:

1 compressor, 2 condenser, 3 evaporator, 4 secondary heat exchanger, 5 bucket, 6 water pump, 7 liquid receiver, 8 filter, 9 throttle assembly, 10 condensing fan.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present utility model, and are not intended to limit the present utility model.

Referring to Figure 1, a cooling system with a large temperature difference between the inlet and outlet ports includes a compressor 1, a condenser 2, an evaporator 3, a secondary heat exchanger 4 and a bucket 5, a compressor 1, a condenser 2 and an evaporator 3 Pipelines are connected in series to form a cycle. The evaporator 3, bucket 5 and secondary heat exchanger 4 are connected in series through pipelines and a water pump 6 to form a cycle. The water pump 6 draws water from the bucket 5 and sends it to the secondary heat exchanger. After 4, it is discharged into the evaporator 3 from the outlet of the secondary heat exchanger 4, and two independent airtight passages are arranged in the evaporator 3, one of which is used for the water flow channel, and the other airtight passage is used for As for the flow channel of the refrigerant liquid, two independent closed channels are also arranged in the secondary heat exchanger 4 , one of which is used for the flow channel of water, and the other closed channel is used for the flow channel of hot liquid. By setting the water pump 6, the secondary heat exchanger 4, the evaporator 3, and the water bucket 5 to form a water circulation system with a stable flow rate, a large range of changes in the flow rate of the cooled liquid can be guaranteed without affecting the normal operation of the refrigeration system; The secondary heat exchanger 4 (preferably a water-oil plate heat exchanger) can adjust the water temperature and flow rate of the refrigeration unit to ensure that the temperature difference between the inlet and outlet of the oil meets the expected requirements of the working condition.

In this embodiment, a liquid accumulator 7, a filter 8 and a throttling assembly 9 are arranged between the condenser 2 and the evaporator 3, on the one hand, the flow rate of the refrigerant liquid can be controlled, and on the other hand, the refrigerant liquid can be filtered , for later use.

In this embodiment, a condensing fan 10 is also included, and the condensing fan 10 performs air cooling against the condenser 2 to accelerate the cooling effect of the condenser 2 .

The above is only used to illustrate the technical solution of the utility model without limitation, other modifications or equivalent replacements made by those skilled in the art to the technical solution of the utility model, as long as they do not depart from the spirit and scope of the technical solution of the utility model , should be covered in the scope of the claims of the present utility model.

Claims (3)

1. A large temperature difference cooling system at the oil inlet and outlet, comprising a compressor, a condenser, and an evaporator, characterized in that: it also includes a secondary heat exchanger and a water bucket, and the compressor, the condenser, and the evaporator are carried out by setting pipelines connected in series to form a cycle, the evaporator, bucket and secondary heat exchanger are connected in series by setting pipes and water pumps to form a cycle, the water pump pumps water from the bucket to the secondary heat exchanger, and then The outlet of the heat exchanger is discharged into the evaporator, and the evaporator is provided with two independent closed channels, one of which is used for the flow of water, and the other is used for the flow of refrigerant liquid, so Two independent airtight passages are also arranged in the secondary heat exchanger, one airtight passage is used for the flow passage of water, and the other airtight passage is used for the flow passage of hot liquid. 2. A cooling system with large temperature difference between oil inlet and outlet according to claim 1, characterized in that: a liquid reservoir, a filter and a throttling assembly are arranged between the condenser and the evaporator. 3. A cooling system with a large temperature difference between oil inlet and outlet according to claim 1, characterized in that it further comprises a condensing fan, and the condensing fan is air-cooled against the condenser.