CN111457613A - A kind of double cold source air suspension centrifugal heat pump device - Google Patents

Abstract

The invention discloses a double cold source air suspension centrifugal heat pump device, comprising an air suspension centrifugal compressor, a three-way valve, a four-way valve, an air source heat exchanger, a liquid accumulator, an economizer, a liquid pump, an air tank, a condenser The air suspension centrifugal compressor has a two-stage impeller, the two-stage impeller are a first-stage impeller and a second-stage impeller, and a motor and a bearing are arranged between the first-stage impeller and the second-stage impeller. ; the secondary impeller of the air suspension centrifugal compressor is connected with the inlet of the three-way valve; the first outlet of the three-way valve is connected with the inlet of the condenser; the second outlet of the three-way valve is connected connected with the first port of the four-way valve. The dual cold source air suspension centrifugal heat pump device of the present invention takes energy from the air and obtains cold water and hot water at the same time. By controlling the balance of the air volume adjustment system for exhaust distribution, the demand for simultaneous cooling and heating of the unit is ensured, and the user is ensured different temperature loads on the side.

Description

A kind of double cold source air suspension centrifugal heat pump device

technical field

The invention relates to a centrifugal heat pump device with double cold source air suspension.

Background technique

At present, the large-scale cold water heat pump devices on the market are screw and centrifugal products. Screw compressors all use oil-lubricated rotors and bearings. Most of the centrifugal compressors use oil-lubricated bearings, and a small part uses magnetic suspension bearings. . Traditionally containing compressors brought many hidden dangers to the system, such as compressor stuck, motor burnout, etc., and the performance of the unit and the heat transfer coefficient of the heat exchanger decreased after the oil was brought into the system. At the same time, the magnetic suspension compressor has low reliability and high maintenance cost. The realization form of the current large-scale heat pump device is divided into two types: one is to use the water system switching method, using a water-type heat pump unit; Since the water heat pump cannot switch the fluorine side, the cooling and heat must be realized through a complex water pipeline system. The air-cooled heat pump can only achieve cooling and heat alone, and can only meet a certain functional requirement when performing the heat recovery function.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the defects of the prior art, and to provide a dual-cooling source air suspension centrifugal heat pump device, which can obtain cold water and hot water at the same time by taking energy from the air. It meets the requirement of cooling and heating of the unit at the same time, and ensures the different temperature loads on the user side. The air suspension centrifugal compressor is used as the lifting power. There is no oil circuit and oil cooling system in the system, which simplifies the installation and ensures the stability of the system performance. and reliability.

The technical scheme for realizing the above-mentioned purpose is: a double cold source air suspension centrifugal heat pump device, comprising an air suspension centrifugal compressor, a three-way valve, a four-way valve, an air source heat exchanger, a liquid accumulator, an economizer, a liquid pump, Gas tanks, condensers and dual-purpose heat exchangers, where:

The air suspension centrifugal compressor has two-stage impellers, and the two-stage impellers are respectively a first-stage impeller and a second-stage impeller, and a motor and a bearing are arranged between the first-stage impeller and the second-stage impeller;

The secondary impeller of the air suspension centrifugal compressor is connected with the inlet of the three-way valve;

The first outlet of the three-way valve is connected to the inlet of the condenser;

The second outlet of the three-way valve is connected to the first port of the four-way valve;

The second port of the four-way valve is connected to the suction port of the first stage impeller of the air suspension centrifugal compressor;

The third port of the four-way valve is connected to the inlet of the air source heat exchanger;

The fourth port of the four-way valve is connected to the first interface of the dual-purpose heat exchanger;

The outlet of the air source heat exchanger is connected with the first interface of the liquid accumulator through a first pipeline;

The second interface of the accumulator is connected to the inlet of the economizer through a first throttling device, and a second throttling device is arranged on the outlet pipe of the economizer;

The outlet pipe of the economizer is connected with the second interface of the dual-purpose heat exchanger through a second pipe;

The outlet pipe of the economizer communicates with the first pipe through a third pipe;

The third interface of the dual-purpose heat exchanger communicates with the first pipeline through a fourth pipeline;

The outlet of the condenser is communicated with the first pipe through a fifth pipe;

the economizer is connected to the air suspension centrifugal compressor;

The third interface of the liquid accumulator, the liquid pump, the gas tank and the motor are connected in sequence.

In the above-mentioned double cold source air suspension centrifugal heat pump device, the air source heat exchanger is a fin-and-tube heat exchanger.

In the above-mentioned double cold source air suspension centrifugal heat pump device, a heating device is arranged inside the air tank.

In the above-mentioned dual cooling source gas suspension centrifugal heat pump device, the dual-purpose heat exchanger adopts a flooded type or falling film type heat exchanger.

In the above-mentioned dual cooling source air suspension centrifugal heat pump device, the bearing adopts air suspension bearing.

In the above-mentioned dual-cooling source gas suspension centrifugal heat pump device, one-way valves are respectively provided on the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the fifth pipeline.

In the above-mentioned dual cold source gas suspension centrifugal heat pump device, the one-way valve on the first pipeline is located between the connection between the first pipeline and the third pipeline and the connection between the first pipeline and the fifth pipeline.

In the above-mentioned dual cooling source air suspension centrifugal heat pump device, a solenoid valve is arranged between the connection between the second interface of the liquid storage device and the first throttling device and the motor.

In the above-mentioned double cold source air suspension centrifugal heat pump device, the three-way valve is a three-way regulating valve; and the four-way valve is a four-way reversing valve.

The dual cold source air suspension centrifugal heat pump device of the present invention takes energy from the air and obtains cold water and hot water at the same time. By controlling the balance of the air volume adjustment system for exhaust distribution, the demand for simultaneous cooling and heating of the unit is ensured, and the user is ensured For different temperature loads on the side, the air suspension centrifugal compressor is used as the lifting power. There is no oil circuit and oil cooling system in the system, which simplifies the installation and ensures the stability and reliability of the system performance.

Description of drawings

FIG. 1 is a schematic structural diagram of the double cold source gas suspension centrifugal heat pump device of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the specific embodiments thereof will be described in detail below with reference to the accompanying drawings:

Please refer to FIG. 1 , a preferred embodiment of the present invention, a dual-cooling source air suspension centrifugal heat pump device, comprising an air suspension centrifugal compressor 1, a three-way valve 12, a four-way valve 3, an air source heat exchanger 4, a storage Liquidizer 6 , economizer 8 , liquid pump 9 , gas tank 10 , condenser 13 and dual-purpose heat exchanger 11 .

The air suspension centrifugal compressor 1 has two-stage impellers, and the two-stage impellers are a first-stage impeller 101 and a second-stage impeller 102 respectively. A motor and a bearing 2 are arranged between the first-stage impeller 101 and the second-stage impeller 102; 1. The air-suspension centrifugal compressor The secondary impeller 102 of the compressor is connected to the inlet 12a of the three-way valve 12; the first outlet 12b of the three-way valve 12 is connected to the inlet of the condenser 13; the second outlet 12c of the three-way valve 12 is connected to the third outlet of the four-way valve 3. One port 3a is connected, the second port 3b of the four-way valve 3 is connected to the suction port of the first stage impeller 101 of the air suspension centrifugal compressor 1; the third port 3c of the four-way valve 3 is connected to the air source heat exchanger 4 The inlet is connected; the fourth port 3d of the four-way valve 3 is connected with the first interface 11a of the dual-purpose heat exchanger 11; the outlet of the air source heat exchanger 4 is connected with the first interface 6a of the liquid accumulator 6 through the first pipe 21 ; The second interface 6b of the accumulator 6 is connected with the inlet of the economizer 8 through the first throttling device 71, and the outlet pipe of the economizer 8 is provided with a second throttling device 72; the outlet pipe of the economizer 8 passes through the second The pipe 22 is connected with the second port 11b of the dual-purpose heat exchanger 11; the outlet pipe of the economizer 8 is connected with the first pipe 21 through the third pipe 23; the third port 11c of the dual-purpose heat exchanger 11 is connected with the fourth pipe 24 Connected with the first pipeline 21; the outlet of the condenser 13 is connected with the first pipeline 21 through the fifth pipeline 25; the economizer 8 is connected with the air suspension centrifugal compressor 1; the third interface 6c of the liquid accumulator 6, the liquid pump 9 , the gas tank 10 and the motor are connected in sequence.

The air source heat exchanger 4 is a fin-and-tube heat exchanger. A heating device is provided inside the gas tank 10 .

The dual-purpose heat exchanger 11 adopts a flooded or falling film heat exchanger. The dual-purpose heat exchanger 11 has three ports, which are used as an evaporator during cooling and as a condenser during heating.

Bearing 2 adopts air suspension bearing.

One-way valves 5 are respectively provided on the first pipeline 21 , the second pipeline 22 , the third pipeline 23 , the fourth pipeline 24 and the fifth pipeline 25 . The one-way valve 5 on the first pipe 21 is located between the connection e of the first pipe 21 and the third pipe 23 and the connection f of the first pipe 21 and the fifth pipe 25 .

A solenoid valve 15 is provided between the connection point g of the second port 6b of the liquid accumulator 6 and the first throttling device 71 and the motor.

The three-way valve 12 is a three-way regulating valve, which can adjust the flow of the two-way outlet; the four-way valve 3 is a four-way reversing valve.

In the dual cold source gas suspension centrifugal heat pump device of the present invention, the refrigeration implementation is as follows: after the refrigerant gas is compressed by the first-stage impeller 101 of the gas suspension centrifugal compressor 1, the gaseous refrigerant of the mixed economizer 8 enters the gas suspension centrifugal compressor After the secondary impeller 102 of the engine 1 is compressed, it enters the inlet 12a of the three-way valve 12, enters the first port 3a of the four-way valve 3 through the second outlet 12 of the three-way valve 12, and then passes through the third port of the four-way valve 3. 3c enters the air source heat exchanger 4. After the refrigerant is cooled into liquid through the air source heat exchanger 4, it flows into the liquid accumulator 6 through the first pipe 21, and after passing through the first throttling device 71 and the second throttling device 72, Through the second pipe 22 and the second interface 11b of the dual-purpose heat exchanger 11, it enters the dual-purpose heat exchanger 11 for evaporation, and the vaporized refrigerant flows through the four-way through the first interface 11a of the dual-purpose heat exchanger 11 in sequence. The fourth port 3d of the valve 3 and the second port 3b of the four-way valve 3 return to the suction port of the first stage impeller 101 of the air suspension centrifugal compressor 1 to form a refrigeration cycle.

The implementation of the heat pump is as follows: after the refrigerant gas is compressed by the primary impeller 101 of the air suspension centrifugal compressor 1, the gaseous refrigerant of the mixed economizer 8 enters the secondary impeller 102 of the air suspension centrifugal compressor 1 after being compressed, and then reaches the third stage. The inlet 12a of the through valve 12 enters the first port 3a of the four-way valve 3 through the second outlet 12 of the three-way valve 12, and then enters the first port of the dual-purpose heat exchanger 11 through the fourth port of the four-way valve 3 , after the refrigerant is cooled into a liquid through the dual-purpose heat exchanger 11, it flows into the accumulator 6 through the third interface 11c, the fourth pipeline 24 and the first pipeline 21 of the dual-purpose heat exchanger 11 in sequence, and then passes through the first section. After the flow device 71, the economizer 8, the second throttling device 72, the third pipe 23, and the first pipe 21, the refrigerant enters the air source heat exchanger 4 from the outlet of the air source heat exchanger 4 to evaporate, and the evaporated refrigerant The gas flows through the inlet of the air source heat exchanger 4, the third port 3c and the second port 3b of the four-way valve 3 and returns to the suction port of the first stage impeller 101 of the air suspension centrifugal compressor 1 to form a refrigeration cycle. The liquid pump 9 extracts the refrigerant from the liquid accumulator 6, and after being heated by the gas tank 10, the gaseous refrigerant enters the machine and the bearing 2 of the electric suspension centrifugal compressor 1, suspends the bearing 2, and is used to support the motor shaft of the motor, A solenoid valve 15 is arranged between the connection point g of the second port 6b of the accumulator 6 and the first throttling device 71 and the motor for cooling the motor, and the refrigerant heated by the motor returns to the air suspension centrifugal compressor The suction port of 1 forms a cycle.

The cooling and simultaneous heating implementation is as follows: after the refrigerant gas is compressed by the primary impeller 101 of the air suspension centrifugal compressor 1, the gaseous refrigerant of the mixed economizer 8 enters the secondary impeller 102 of the air suspension centrifugal compressor 1 after being compressed. , to the inlet 12a of the three-way valve 12, one way enters the condenser 13 through the first outlet 12b of the three-way valve 12, the other way enters the first port 3a of the four-way valve 3 through the second outlet 12c of the three-way valve 12, and then The refrigerant enters the dual-purpose heat exchanger 11 through the fourth port 3d of the four-way valve 3 . After the refrigerant is cooled into a liquid through the dual-purpose heat exchanger 11 , the refrigerant passes through the third interface 11c and the fourth pipe 24 of the dual-purpose heat exchanger 11 in sequence. and the first pipe 21 flow into the accumulator 6, and then pass through the first throttling device 71, the economizer 8, the second throttling device 72, the third pipe 23, the first pipe 21, and then pass through the air source heat exchanger 4. The outlet of the air source heat exchanger 4 is evaporated, and the evaporated refrigerant gaseously flows through the inlet of the air source heat exchanger 4, the third port 3c and the second port 3b of the four-way valve 3 and returns to the air suspension centrifugal compressor. The suction port of the first stage impeller 101 of 1 forms a refrigeration cycle. The liquid pump 9 extracts the refrigerant from the liquid accumulator 6, and after being heated by the gas tank 10, the gaseous refrigerant enters the motor and the bearing 2, suspends the bearing to support the motor shaft, and the second interface 6b of the liquid accumulator 6 is connected to the first A solenoid valve 15 is arranged between the connection point g of the throttling device 71 and the motor for cooling the motor, and the refrigerant heated by the motor returns to the suction port of the air suspension centrifugal compressor 1 to form a circulation.

The dual cold source air suspension centrifugal heat pump device of the present invention can utilize the air source to realize functions such as cooling, heating, cooling and heating at the same time, reduces the switching of the user side, ensures the stability and reliability of the user side water system, and has higher overall efficiency , is a multifunctional and efficient equipment. The air suspension centrifugal compressor used reduces the oil system, the air suspension is stable and reliable, the pressure ratio is higher, and the efficiency is higher. It is an environmentally friendly new energy heat pump equipment.

To sum up, the dual cold source air suspension centrifugal heat pump device of the present invention obtains cold water and hot water at the same time by taking energy from the air, and by controlling the balance of the air volume adjustment system for exhaust distribution, thus ensuring the cooling and heating of the unit at the same time. It ensures the different temperature loads on the user side. The air suspension centrifugal compressor is used as the lifting power. There is no oil circuit and oil cooling system in the system, which simplifies the installation and ensures the stability and reliability of the system performance.

Those skilled in the art should realize that the above embodiments are only used to illustrate the present invention, but not to limit the present invention. Changes and modifications will fall within the scope of the claims of the present invention.

Claims (9)

1. a double cold source air suspension centrifugal heat pump device, is characterized in that, comprises air suspension centrifugal compressor, three-way valve, four-way valve, air source heat exchanger, liquid accumulator, economizer, liquid pump, gas tank , condensers and dual-purpose heat exchangers, including: The air suspension centrifugal compressor has two-stage impellers, and the two-stage impellers are respectively a first-stage impeller and a second-stage impeller, and a motor and a bearing are arranged between the first-stage impeller and the second-stage impeller; The secondary impeller of the air suspension centrifugal compressor is connected with the inlet of the three-way valve; The first outlet of the three-way valve is connected to the inlet of the condenser; The second outlet of the three-way valve is connected to the first port of the four-way valve; The second port of the four-way valve is connected to the suction port of the first stage impeller of the air suspension centrifugal compressor; The third port of the four-way valve is connected to the inlet of the air source heat exchanger; The fourth port of the four-way valve is connected to the first interface of the dual-purpose heat exchanger; The outlet of the air source heat exchanger is connected with the first interface of the liquid accumulator through a first pipeline; The second interface of the accumulator is connected to the inlet of the economizer through a first throttling device, and a second throttling device is arranged on the outlet pipe of the economizer; The outlet pipe of the economizer is connected with the second interface of the dual-purpose heat exchanger through a second pipe; The outlet pipe of the economizer communicates with the first pipe through a third pipe; The third interface of the dual-purpose heat exchanger communicates with the first pipeline through a fourth pipeline; The outlet of the condenser is communicated with the first pipe through a fifth pipe; the economizer is connected to the air suspension centrifugal compressor; The third interface of the liquid accumulator, the liquid pump, the gas tank and the motor are connected in sequence. 2 . The air suspension centrifugal heat pump device according to claim 1 , wherein the air source heat exchanger is a fin-and-tube heat exchanger. 3 . 3 . The dual-cooling source air suspension centrifugal heat pump device according to claim 1 , wherein a heating device is arranged inside the air tank. 4 . 4 . The dual-cooling source gas suspension centrifugal heat pump device according to claim 1 , wherein the dual-purpose heat exchanger adopts a flooded or falling film heat exchanger. 5 . 5 . The air-suspension centrifugal heat pump device according to claim 1 , wherein the bearing adopts an air-suspension bearing. 6 . 6 . The dual-cooling source gas suspension centrifugal heat pump device according to claim 1 , wherein the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the fifth pipeline are respectively provided with single to the valve. 7 . The dual-cooling source gas suspension centrifugal heat pump device according to claim 6 , wherein the one-way valve on the first pipeline is located at the connection between the first pipeline and the third pipeline and the first pipeline and the third pipeline. 8 . between the junctions of the fifth conduit. 8 . A dual-cooling source air suspension centrifugal heat pump device according to claim 1 , wherein a solenoid valve is provided between the connection between the second interface of the accumulator and the first throttling device and the motor. 9 . . 9 . The centrifugal heat pump device with dual cooling source air suspension according to claim 1 , wherein the three-way valve is a three-way regulating valve; the four-way valve is a four-way reversing valve. 10 .

Images