CN211290622U - Cascade high-temperature heat pump system - Google Patents

Cascade high-temperature heat pump system Download PDF

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Publication number
CN211290622U
CN211290622U CN201921890945.XU CN201921890945U CN211290622U CN 211290622 U CN211290622 U CN 211290622U CN 201921890945 U CN201921890945 U CN 201921890945U CN 211290622 U CN211290622 U CN 211290622U
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heat exchanger
condenser
valve
passage
pump system
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CN201921890945.XU
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许琨
于晓静
夏帅帅
解玲玉
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Yantai Oceanair Air Conditioning Co ltd
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Yantai Oceanair Air Conditioning Co ltd
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Abstract

The utility model relates to a cascade high-temperature heat pump system, which comprises a condenser, a condensation evaporator and an air-cooled heat exchanger, wherein the condenser and the condensation evaporator are connected to form a condenser side loop, and the air-cooled heat exchanger and the condensation evaporator are connected to form a heat exchanger side loop; the heat exchanger side loop comprises a heat exchanger side first passage and a heat exchanger side second passage; the first passage of the heat exchange side comprises a four-way reversing valve, an oil separator A, a low-temperature stage compressor and an air separation device which are sequentially connected from a condensation evaporator to an air cooling heat exchanger through pipelines, the other two interfaces of the four-way reversing valve are respectively communicated with an inlet and an outlet of the air separation device through pipelines, and a backflow pipeline with an electromagnetic valve is arranged between the oil separator A and the low-temperature stage compressor; and a liquid storage tank is arranged on the pipeline of the second passage at the heat exchanger side. The heat pump system designed by the application can meet the water outlet requirement of more than 60 ℃ at the ambient temperature lower than-25 ℃, and can realize higher operation energy efficiency of the refrigerating system.

Description

Cascade high-temperature heat pump system
Technical Field
The utility model relates to a cascade high temperature heat pump system belongs to heat pump system technical field.
Background
At present, the common low-temperature air source heat pump units in the market all adopt a single-stage compression refrigeration system to operate, and the operation effect is good when refrigeration is carried out in summer. When the air conditioner runs in winter, the refrigeration efficiency is extremely low, and even the air conditioner cannot be normally started when the air conditioner runs in extremely cold regions such as northeast and the like. At present, a common method for solving the problems is to adopt a scheme of adding electric auxiliary heating to solve the problems of unstable operation and the like caused by low water temperature during initial starting, and the heating efficiency of the mode is lower than that of compression heating.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that current heat pump system is poor in extremely cold area suitability, provide a cascade high temperature heat pump system.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a cascade high-temperature heat pump system is characterized by comprising a condenser, a condensing evaporator and an air-cooled heat exchanger, wherein the condenser and the condensing evaporator are connected to form a condenser side loop;
the heat exchanger side loop comprises a heat exchanger side first passage and a heat exchanger side second passage; the first passage of the heat exchange side comprises a four-way reversing valve, an oil separator A, a low-temperature stage compressor and an air separation device which are sequentially connected from a condensation evaporator to an air cooling heat exchanger through pipelines, the other two interfaces of the four-way reversing valve are respectively communicated with an inlet and an outlet of the air separation device through pipelines, and a backflow pipeline with an electromagnetic valve is arranged between the oil separator A and the low-temperature stage compressor; and a liquid storage tank is arranged on the pipeline of the second passage at the heat exchanger side.
Four ports of the four-way reversing valve in the technical scheme are respectively connected to the high-pressure end and the low-pressure end of the low-temperature section compressor and the inlet pipeline and the outlet pipeline of the condensation evaporator gas separation device. The air side heat exchanger is an air-cooled heat exchanger, and the condenser is a shell-tube type, sleeve-tube type or plate type heat exchanger.
On the basis of the technical scheme, the utility model discloses a reach the convenience of use and the stability of equipment, can also make following improvement to foretell technical scheme:
further, the condenser-side circuit includes a condenser-side first passage and a condenser-side second passage; the first passage at the condenser side comprises an oil separator B, a high-temperature section compressor and a gas-liquid separator which are sequentially connected from the condenser to the condensation evaporator through pipelines, and the oil separator B and the high-temperature section compressor are provided with return pipelines with electromagnetic valves; and an expansion valve and an electromagnetic valve are arranged on a pipeline of the second passage at the condenser side.
Further, the gas separation device is an R404A gas separation device; the condenser is an R134A condenser, and the liquid storage tank is an R404A liquid storage tank.
Further, a suction filter is arranged on a pipeline between the low-temperature stage compressor and the gas separation device; and the pipeline of the high-temperature section compressor and the gas-liquid separator is provided with a suction filter.
Furthermore, a check valve is arranged on a pipeline of the low-temperature stage compressor to the oil separator A.
Furthermore, an expansion valve and an electromagnetic valve are arranged on a pipeline between the air-cooled heat exchanger and the liquid storage tank.
Furthermore, a stop valve is arranged on a pipeline between the condenser and the oil separator B; a stop valve is arranged on a pipeline between the gas-liquid separator and the condensing evaporator; a stop valve is arranged between the condensing evaporator and the four-way reversing valve; a stop valve is arranged between the oil separator A and the one-way valve; a stop valve is arranged between the condensation evaporator and the liquid storage tank; the inlet pipeline and the outlet pipeline of the gas separation device are respectively provided with a stop valve.
Furthermore, the low-temperature stage compressor adopts a semi-closed screw compressor, and the high-temperature stage compressor adopts a fully-closed scroll compressor.
The utility model has the advantages that: through the reasonable design of pipeline connection, the structure of the air conditioner can be applied to a low-temperature environment, the water outlet requirement of more than 60 ℃ is met at the environment temperature lower than minus 25 ℃, and the high operation energy efficiency of a refrigerating system can be realized. The system can solve the problems of low energy efficiency and the like when the traditional low-temperature air-cooled heat pump system operates in the north China and the northeast China in extremely cold weather in winter.
Drawings
Fig. 1 is a schematic structural diagram of a cascade high-temperature heat pump system according to the present application.
The reference numbers are recorded as follows: the system comprises a condenser 1, a condensing evaporator 2, an air cooling heat exchanger 3, a four-way reversing valve 4, an oil separator A5, a low-temperature stage compressor 6, an air separation device 7, a liquid storage tank 8, an oil separator B9, a high-temperature stage compressor 10 and a gas-liquid separator 11.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
A cascade high-temperature heat pump system (see figure 1) comprises a condenser 1, a condensing evaporator 2 and an air-cooled heat exchanger 3, wherein the condenser 1 and the condensing evaporator 2 are connected to form a condenser side loop, and the air-cooled heat exchanger 3 and the condensing evaporator 2 are connected to form a heat exchanger side loop;
the heat exchanger side loop comprises a heat exchanger side first passage and a heat exchanger side second passage; the first passage of the heat exchange side comprises a four-way reversing valve 4, an oil separator A5, a low-temperature stage compressor and an air separation device 7 which are sequentially connected from a condensation evaporator 2 to an air cooling heat exchanger 3 through pipelines, the other two interfaces of the four-way reversing valve 4 are respectively communicated with an inlet and an outlet of the air separation device 7 through pipelines, and a backflow pipeline with an electromagnetic valve is arranged between the oil separator A5 and the low-temperature stage compressor 6; a liquid storage tank 8 is arranged on a pipeline of the second passage at the heat exchanger side;
the condenser side loop comprises a condenser side first passage and a condenser side second passage; the first path on the condenser side comprises an oil separator B9, a high-temperature stage compressor 10 and a gas-liquid separator 11 which are sequentially connected from the condenser 1 to the condensation evaporator 2 through pipelines, wherein the oil separator B9 and the high-temperature stage compressor 10 are provided with a return pipeline with an electromagnetic valve; and an expansion valve and an electromagnetic valve are arranged on a pipeline of the second passage at the condenser side.
In the above embodiment, the gas separation device 7 is an R404A gas separation device; the condenser 1 is an R134A condenser, and the liquid storage tank 8 is an R404A liquid storage tank; a suction filter is arranged on a pipeline between the low-temperature stage compressor 6 and the gas separation device 7; the pipelines of the high-temperature section compressor 10 and the gas-liquid separator 11 are provided with a suction filter; a check valve is arranged on a pipeline from the low-temperature stage compressor 6 to the oil separator A5; an expansion valve and an electromagnetic valve are arranged on a pipeline between the air-cooled heat exchanger 3 and the liquid storage tank 8; a stop valve is arranged on a pipeline between the condenser 1 and the oil separator B9; a stop valve is arranged on a pipeline between the gas-liquid separator 11 and the condensing evaporator 2; a stop valve is arranged between the condensing evaporator 2 and the four-way reversing valve 4; a stop valve is arranged between the oil separator A5 and the one-way valve; a stop valve is arranged between the condensation evaporator 2 and the liquid storage tank 8; the inlet pipeline and the outlet pipeline of the gas separation device 7 are respectively provided with a stop valve; the low-temperature stage compressor adopts a semi-closed screw compressor, and the high-temperature stage compressor adopts a fully-closed scroll compressor.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. The cascade high-temperature heat pump system is characterized by comprising a condenser (1), a condensing evaporator (2) and an air-cooled heat exchanger (3), wherein the condenser (1) and the condensing evaporator (2) are connected to form a condenser side loop, and the air-cooled heat exchanger (3) and the condensing evaporator (2) are connected to form a heat exchanger side loop;
the heat exchanger side loop comprises a heat exchanger side first passage and a heat exchanger side second passage; the first passage of the heat exchange side comprises a four-way reversing valve (4), an oil separator A (5), a low-temperature section compressor and an air separation device (7) which are sequentially connected from a condensation evaporator (2) to an air cooling heat exchanger (3) through pipelines, the other two interfaces of the four-way reversing valve (4) are respectively communicated with an inlet and an outlet of the air separation device (7) through pipelines, and a backflow pipeline with an electromagnetic valve is arranged between the oil separator A (5) and the low-temperature section compressor (6); and a liquid storage tank (8) is arranged on the pipeline of the second passage at the heat exchanger side.
2. The cascade high temperature heat pump system according to claim 1, wherein said condenser side loop comprises a condenser side first passage and a condenser side second passage; the first path on the condenser side comprises an oil separator B (9), a high-temperature section compressor (10) and a gas-liquid separator (11) which are sequentially connected from the condenser (1) to the condensation evaporator (2) through pipelines, and the oil separator B (9) and the high-temperature section compressor (10) are provided with return pipelines with electromagnetic valves; and an expansion valve and an electromagnetic valve are arranged on a pipeline of the second passage at the condenser side.
3. The cascade high temperature heat pump system according to claim 2, wherein said air separation unit (7) is an R404A air separation unit; the condenser (1) is an R134A condenser, and the liquid storage tank (8) is an R404A liquid storage tank.
4. The cascade high temperature heat pump system according to claim 3, wherein a suction filter is installed in the pipe between the low temperature stage compressor (6) and the air separation unit (7); and a suction filter is arranged on the pipeline of the high-temperature section compressor (10) and the gas-liquid separator (11).
5. The cascade high temperature heat pump system according to claim 4, wherein said low temperature stage compressor (6) is provided with a check valve in the line to the oil separator A (5).
6. The cascade high temperature heat pump system according to claim 5, wherein an expansion valve and a solenoid valve are provided in the conduit between the air-cooled heat exchanger (3) and the liquid reservoir (8).
7. The cascade high temperature heat pump system according to claim 6, wherein a shut-off valve is installed in the pipe between the condenser (1) and the oil separator B (9); a stop valve is arranged on a pipeline between the gas-liquid separator (11) and the condensing evaporator (2); a stop valve is arranged between the condensing evaporator (2) and the four-way reversing valve (4); a stop valve is arranged between the oil separator A (5) and the one-way valve; a stop valve is arranged between the condensation evaporator (2) and the liquid storage tank (8); the inlet pipeline and the outlet pipeline of the gas separation device (7) are respectively provided with a stop valve.
8. The cascade high temperature heat pump system according to claim 1, wherein the low temperature stage compressor is a semi-hermetic screw compressor and the high temperature stage compressor is a hermetic scroll compressor.
CN201921890945.XU 2019-11-05 2019-11-05 Cascade high-temperature heat pump system Active CN211290622U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921890945.XU CN211290622U (en) 2019-11-05 2019-11-05 Cascade high-temperature heat pump system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921890945.XU CN211290622U (en) 2019-11-05 2019-11-05 Cascade high-temperature heat pump system

Publications (1)

Publication Number Publication Date
CN211290622U true CN211290622U (en) 2020-08-18

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Application Number Title Priority Date Filing Date
CN201921890945.XU Active CN211290622U (en) 2019-11-05 2019-11-05 Cascade high-temperature heat pump system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110608539A (en) * 2019-11-05 2019-12-24 烟台欧森纳地源空调股份有限公司 Cascade high-temperature heat pump system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110608539A (en) * 2019-11-05 2019-12-24 烟台欧森纳地源空调股份有限公司 Cascade high-temperature heat pump system

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