CN201909490U

CN201909490U - Double-stage compression heat pump system

Info

Publication number: CN201909490U
Application number: CN2010206744811U
Authority: CN
Inventors: 杨永安; 马晨; 李砚明; 吕正刚; 陆佩强; 毛力; 董小勇; 严雷; 叶庆银
Original assignee: Tianjin University of Commerce
Current assignee: Tianjin University of Commerce
Priority date: 2010-12-22
Filing date: 2010-12-22
Publication date: 2011-07-27
Anticipated expiration: 2020-12-22

Abstract

The utility model discloses a double-stage compression heat pump system. The purpose of the utility model is to provide the double-stage compression heat pump system which can easily regulate energy and realize the mutual switching between high-pressure stage compressors and low-pressure stage compressors, so that the efficiency of the heat pump system can be increased. Meanwhile, when the heat pump system is used as an air conditioner in summer, all compressors can come into service, so that the cooling capacity can be increased. The double-stage compression heat pump system comprises a plurality of compressor sets, a first heat exchanger, a second heat exchanger and an interstage cooler, each compressor set comprises the compressor, a four-way reversing valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, the exhaust end of the compressor is respectively connected with the first electromagnetic valve and the second electromagnetic valve, the suction end of the compressor is respectively connected with the third electromagnetic valve and the fourth electromagnetic valve, and the high-pressure stage and the low-pressure stage are mutually switched by the opening or closing of the electromagnetic valves connected with each compressor. During double-stage compression cooling cycle and double-stage compression heat pump cycle, the system efficiency can be increased by regulating the flow of coolant.

Description

Twin-stage compressing hot pump system

Technical field

The utility model relates to a kind of heat pump circulating system, in particular, can realize single-stage and the twin-stage compression refrigeration circulation that relate to a kind of multimachine head can realize the system of single-stage and the circulation of twin-stage compressing hot pump again, when realizing twin-stage compression refrigeration and heat pump cycle, can improve systematic energy efficiency ratio.

Background technology

Online heat pump heating system is applied to winter heating, and it is simple to have system, need not advantages such as personnel's post.But when the difference of evaporating temperature and condensation temperature was big, multi-joint machine heat pump compressor was because compression ratio is bigger, and efficient is extremely low, should use twin-stage compressing hot pump system.There are unit head and first two mode of multimachine in twin-stage compressing hot pump of the prior art system, the tonifying Qi mode realizes the twin-stage compression in the middle of general the employing in the unit head, this moment the hiigh pressure stage compressor with the minimum cylinder volume of low-pressure stage compressor than generally being fixed as 1: 3 or 1: 2.Because the evaporating pressure of heat pump can change with outdoor environment temperature, the intermediate pressure of system and hiigh pressure stage compressor and low-pressure stage cylinder of compressor volumetric ratio also can constantly change, and this is uneconomic for the high-low pressure cylinder ratio that designs.Though multimachine head mode of the prior art adopts the variable refrigerant volume mode to guarantee the when suitable cylinder ratio of proper compression, but the compressor form is fixed, hiigh pressure stage and low-pressure stage compressor can not use simultaneously when used as air-conditioning summer, and the initial cost of system is higher.

The utility model content

The utility model is in order to overcome weak point of the prior art, a kind of twin-stage compressing hot pump system that is easy to energy adjustment to be provided, can realize the mutual conversion of hiigh pressure stage compressor and low-pressure stage compressor, improving the efficient of heat pump.When the summer fever pumping system used as air-conditioning, all compressor can come into operation simultaneously, improved the refrigerating capacity in summer.

The utility model is achieved through the following technical solutions:

The twin-stage compressing hot pump system of not exclusively cooling off in the middle of a kind of one-level throttling, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the shell-side outlet of intercooler after the second magnetic valve parallel connection, be connected with the shell-side outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve also is connected with first expansion valve inlet with Intermediate Heat Exchanger pipe side entrance simultaneously with the outlet of second check valve is in parallel, the outlet of first expansion valve is connected with the intercooler shell-side inlet, intercooler pipe side outlet is connected with second expansion valve inlet, and the outlet of second expansion valve is connected with the 4th check valve inlet with the 3rd check valve inlet respectively.

The twin-stage compressing hot pump system of not exclusively cooling off in the middle of a kind of one-level throttling, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the shell-side outlet of intercooler after the second magnetic valve parallel connection, be connected with the shell-side outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve also is connected with Intermediate Heat Exchanger pipe side entrance simultaneously with the outlet of second check valve is in parallel, the pipe side outlet of intercooler enters the mouth with first expansion valve respectively, second expansion valve inlet connects, the outlet of first expansion valve is connected with the intercooler shell-side inlet, and the outlet of second expansion valve enters the mouth with the 3rd check valve respectively, the 4th check valve inlet connects.

The twin-stage compressing hot pump system of cooling off fully in the middle of a kind of one-level throttling, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the liquid level below shell-side inlet of intercooler after the second magnetic valve parallel connection, be connected with the shell-side gaseous phase outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve in parallel with the outlet of second check valve and simultaneously with the pipe side entrance of Intermediate Heat Exchanger, the inlet of first expansion valve connects, the outlet of first expansion valve is connected with the shell-side inlet of intercooler, the pipe side outlet of intercooler is connected with second expansion valve inlet, and the outlet of second expansion valve enters the mouth with the 3rd check valve respectively, the 4th check valve inlet connects.

The twin-stage compressing hot pump system of not exclusively cooling off in the middle of a kind of two-step throttle, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the gaseous phase outlet of intercooler after the second magnetic valve parallel connection, be connected with the gaseous phase outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve also is connected with first expansion valve inlet simultaneously with the outlet of second check valve is in parallel, the outlet of first expansion valve is connected with the shell-side inlet of intercooler, the liquid phase outlet of intercooler is connected with second expansion valve inlet, and the outlet of second expansion valve enters the mouth with the 3rd check valve respectively, the 4th check valve inlet connects.

The twin-stage compressing hot pump system of cooling off fully in the middle of a kind of two-step throttle, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the liquid level below shell-side inlet of intercooler after the second magnetic valve parallel connection, be connected with the gaseous phase outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve also is connected with first expansion valve inlet simultaneously with the outlet of second check valve is in parallel, the outlet of first expansion valve is connected with the shell-side inlet of intercooler, the liquid phase outlet of intercooler is connected with second expansion valve inlet, and the outlet of second expansion valve enters the mouth with the 3rd check valve respectively, the 4th check valve inlet connects.

The utlity model has following technique effect:

1, twin-stage compressing hot pump of the present utility model system is made up of many groups compressor bank, unlatching by being connected in each compressor air suction end and exhaust end magnetic valve or close, realize the mutual conversion of hiigh pressure stage compressor and low-pressure stage compressor, when needs single-stage kind of refrigeration cycle or single-stage heat pump cycle, all compressors all can be worked, and the initial cost of system is less.System can realize single stage compress kind of refrigeration cycle, twin-stage compression refrigeration circulation, single stage compress heat pump cycle and the circulation of twin-stage compressing hot pump.At twin-stage compression refrigeration circulation and twin-stage compressing hot pump circulation time, can effectively improve system effectiveness by regulating refrigerant flow.When the summer fever pumping system used as air-conditioning, all compressor can come into operation simultaneously, improved the refrigerating capacity in summer.

2, twin-stage compressing hot pump of the present utility model system is by the adjusting to the flow of the start-stop of participation system recycle compressor or compressor compresses cold-producing medium; can realize freezing and the little temperature difference fluctuation control of heat pump effective adjusting of feasible system refrigerating capacity or heating capacity.

Description of drawings

Fig. 1 is the schematic diagram that not exclusively cools off twin-stage compressing hot pump system in the middle of the one-level throttling of the present utility model;

Fig. 2 is the schematic diagram that not exclusively cools off twin-stage compressing hot pump system in the middle of the another kind of one-level throttling;

Fig. 3 is the middle schematic diagram of the twin-stage compressing hot pump system of cooling fully of one-level compression;

Fig. 4 is the schematic diagram of the twin-stage compressing hot pump system of incomplete cooling in the middle of the two-step throttle;

Fig. 5 is the middle schematic diagram of the twin-stage compressing hot pump system of cooling fully of two-step throttle;

Fig. 6 is the interface schematic diagram of four-way change-over valve.

The specific embodiment

Twin-stage compressing hot pump of the present utility model system is by the parallel connections of many group compressor bank, utilization be connected in each compressor air suction end and exhaust end magnetic valve unlatching or close, the mutual conversion of hiigh pressure stage compressor and low-pressure stage compressor can be realized, thereby single stage compress kind of refrigeration cycle, twin-stage compression refrigeration circulation, single stage compress heat pump cycle and the circulation of twin-stage compressing hot pump can be realized.Incomplete incomplete four kinds of forms such as cooling in the middle of cooling and the two-step throttle fully in the middle of cooling, the two-step throttle in the middle of cooling, the one-level throttling fully in the middle of the change on the connected mode of the form of the quantity of choke valve, intercooler and choke valve and intercooler can have the one-level throttling.

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

Embodiment 1

Fig. 1 is the schematic diagram of the twin-stage compressing hot pump system of incomplete cooling in the middle of the throttling of the utility model one-level, comprises many group compressor bank, first heat exchanger 4, second heat exchanger 8, intercoolers 5, and intercooler is shell and tube exchanger or plate type heat exchanger.Every group of compressor bank comprises compressor 1, four-way change-over valve 2, the first magnetic valve 3-1, the second magnetic valve 3-2, the 3rd magnetic valve 3-3, the 4th magnetic valve 3-4, the exhaust end of compressor 1 is connected with the second magnetic valve 3-2 with the first magnetic valve 3-1 respectively, the suction end of compressor 1 is connected with the 4th magnetic valve 3-4 with the 3rd magnetic valve 3-3 respectively, the first magnetic valve 3-1 of every group of compressor bank is connected with the 4th interface 2-4 of four-way change-over valve 2, be connected with the shell-side outlet of intercooler 5 after the second magnetic valve 3-2 parallel connection, be connected with the shell-side outlet of intercooler 5 after the 3rd magnetic valve 3-3 parallel connection, the 4th magnetic valve 3-4 is connected with the first interface 2-1 of four-way change-over valve 2, be connected with second interface of first heat exchanger 4 after the second interface 2-2 parallel connection of the four-way change-over valve 2 of every group of compressor bank, be connected with second interface of second heat exchanger 8 after the 3rd interface 2-3 parallel connection of four-way change-over valve 2, first interface of first heat exchanger 4 respectively with the inlet of the first check valve 6-1, the outlet of the 4th check valve 6-4 connects, first interface of second heat exchanger 8 respectively with the inlet of the second check valve 6-2, the outlet of the 3rd check valve 6-3 connects, the outlet of the first check valve 6-1 is in parallel with second check valve 6-2 outlet and manage side entrances with Intermediate Heat Exchanger 5 simultaneously, the first expansion valve 7-1 connection that enters the mouth, first expansion valve 7-1 outlet is connected with intercooler 5 shell-side inlet, intercooler 5 pipe side outlets are connected with second expansion valve 7-2 inlet, and second expansion valve 7-2 outlet is connected with the 4th check valve 6-4 inlet with the 3rd check valve 6-3 inlet respectively.

The twin-stage compressing hot pump system of not exclusively cooling off in the middle of the one-level throttling shown in Figure 1 can realize single stage compress kind of refrigeration cycle, single stage compress heat pump cycle, twin-stage compression refrigeration circulation, the circulation of twin-stage compressing hot pump.Running situation is as follows:

When 1, system was the single stage compress kind of refrigeration cycle: first heat exchanger 4 was condenser, and second heat exchanger 8 is an evaporimeter.Each first magnetic valve 3-1 that organizes compressor bank opens, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, after cold-producing medium is compressed to high-pressure by compressor 1, through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface 2-4, enter condensation heat release in first heat exchanger 4 behind the four-way change-over valve 2 second interface 2-2, condensed refrigerant liquid enters intercooler 5 pipe side-entrances through the first check valve 6-1, after coming out, middle cooler 5 pipe side outlets are depressurized to low pressure by the second choke valve 7-2 throttling, enter evaporation heat absorption in second heat exchanger 8 through the 3rd check valve 6-3, produce the refrigeration phenomenon, pass through the 3rd interface 2-3 of four-way change-over valve 2 again, the first interface 2-1 and the 4th magnetic valve 3-4 of four-way change-over valve 2 get back in the compressor 1, finish kind of refrigeration cycle.

2, system is a twin-stage compression refrigeration circulation time: first heat exchanger 4 is condenser, and second heat exchanger 8 is an evaporimeter, serves as the low-pressure stage compressor for one or several in the multiple compressors and uses, and remaining compressor is served as the hiigh pressure stage compressor and used.

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, high-pressure refrigerant after the 4 condensation heat releases of first heat exchanger is divided into two-way behind the first check valve 6-1, one the tunnel enters intercooler 5 shell-side inlet behind the pressure pressure in the first expansion valve 7-1 is throttled to, the heat absorption back exports out from middle cooler 5 shell-sides, another road enters from the pipe side-entrance of middle cooler 5, cross through heat release and to flow out from the pipe side outlet of middle cooler 5 after cold, throttling is depressurized to low pressure in the second choke valve 7-2, enter evaporation heat absorption in second heat exchanger 8 through the 3rd check valve 6-3, produce the refrigeration phenomenon, low-pressure refrigerant vapor after the heat absorption is through four-way change-over valve 2 the 3rd interface 2-3, four-way change-over valve 2 first interface 2-1 and the 4th magnetic valve 3-4 enter in the low-pressure stage compressor, the middle compacting cryogen that the low-pressure stage compressor compresses goes out through the second magnetic valve 3-2 with export out from middle cooler 5 shell-sides the compacting cryogen be mixed into the suction end of hiigh pressure stage compressor.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, from the low-pressure stage compressor compresses go out the compacting cryogen mix after the 3rd magnetic valve 3-3 enters the hiigh pressure stage compressor with the middle compacting cryogen that intercooler 5 shell-sides export out, be compressed into the first magnetic valve 3-1 of cold-producing medium behind the high pressure through being connected with the hiigh pressure stage compressor, four-way change-over valve 2 the 4th interface 2-4, four-way change-over valve 2 second interface 2-2 enter condensation heat release in first heat exchanger 4.

When 3, system was the single stage compress heat pump cycle: first heat exchanger 4 was evaporimeter, and second heat exchanger 8 is a condenser.Each first magnetic valve 3-1 that organizes compressor bank opens, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, after cold-producing medium is compressed to high-pressure by compressor 1, through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface, four-way change-over valve 2 the 3rd interface 2-3 enters condensation heat release in second heat exchanger 8, generation heats phenomenon, condensed refrigerant liquid enters intercooler 5 pipe side-entrances through the second check valve 6-2, after coming out, middle cooler 5 pipe side outlets are depressurized to low pressure by the second choke valve 7-2 throttling, enter evaporation heat absorption in first heat exchanger 4 through the 4th check valve 6-4, pass through the second interface 2-2 of four-way change-over valve 2 again, the first interface 2-1 and the 4th magnetic valve 3-4 of four-way change-over valve 2 get back in the compressor 1, finish heat pump cycle.

4, system is a twin-stage compressing hot pump circulation time: first heat exchanger 4 is evaporimeter, and second heat exchanger 8 is a condenser, serves as the low-pressure stage compressor for one or several in the multiple compressors and uses, and remaining compressor is served as the hiigh pressure stage compressor and used.

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, high-pressure refrigerant after the 8 condensation heat releases of second heat exchanger is divided into two-way behind the second check valve 6-2, one the tunnel enters intercooler 5 shell-side inlet behind the pressure pressure in the first expansion valve 7-1 is throttled to, the heat absorption back exports out from middle cooler 5 shell-sides.Another road enters from the pipe side-entrance of middle cooler 5, cross through heat release and to flow out from the pipe side outlet of middle cooler 5 after cold, throttling is depressurized to low pressure in the second choke valve 7-2, enter evaporation heat absorption in first heat exchanger 4 through the 4th check valve 6-4, low-pressure refrigerant vapor after the heat absorption is through four-way change-over valve 2 second interface 2-2, four-way change-over valve 2 first interface 2-1 and the 4th magnetic valve 3-4 enter in the low-pressure stage compressor, the middle compacting cryogen that the low-pressure stage compressor compresses goes out through the second magnetic valve 3-2 with export out from middle cooler 5 shell-sides the compacting cryogen be mixed into the suction end of hiigh pressure stage compressor.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, from the low-pressure stage compressor compresses go out the compacting cryogen mix after the 3rd magnetic valve 3-3 enters the hiigh pressure stage compressor with the middle compacting cryogen that intercooler 5 shell-sides export out, be compressed into the first magnetic valve 3-1 of cold-producing medium behind the high pressure through being connected with the hiigh pressure stage compressor, four-way change-over valve 2 the 4th interface 2-4, four-way change-over valve 2 the 3rd interface 2-3 enters condensation heat release in second heat exchanger 8, produces to heat phenomenon.

Embodiment 2

Fig. 2 is the schematic diagram of the twin-stage compressing hot pump system of incomplete cooling in the middle of the another kind of one-level throttling, and except the connected mode difference of second choke valve, other structures are identical with embodiment 1.Comprise many group compressor bank, first heat exchanger 4, second heat exchanger 8, intercooler 5, intercooler is shell and tube exchanger or plate type heat exchanger.Every group of compressor bank comprises compressor 1, four-way change-over valve 2, the first magnetic valve 3-1, the second magnetic valve 3-2, the 3rd magnetic valve 3-3, the 4th magnetic valve 3-4, the exhaust end of compressor 1 is connected with the second magnetic valve 3-2 with the first magnetic valve 3-1 respectively, the suction end of compressor 1 is connected with the 4th magnetic valve 3-4 with the 3rd magnetic valve 3-3 respectively, the first magnetic valve 3-1 of every group of compressor bank is connected with the 4th interface 2-4 of four-way change-over valve 2, be connected with the shell-side outlet of intercooler 5 after the second magnetic valve 3-2 parallel connection, be connected with the shell-side outlet of intercooler 5 after the 3rd magnetic valve 3-3 parallel connection, the 4th magnetic valve 3-4 is connected with the first interface 2-1 of four-way change-over valve 2, be connected with second interface of first heat exchanger 4 after the second interface 2-2 parallel connection of the four-way change-over valve 2 of every group of compressor bank, be connected with second interface of second heat exchanger 8 after the 3rd interface 2-3 parallel connection of four-way change-over valve 2, first interface of first heat exchanger 4 respectively with the inlet of the first check valve 6-1, the outlet of the 4th check valve 6-4 connects, first interface of second heat exchanger 8 respectively with the inlet of the second check valve 6-2, the outlet of the 3rd check valve 6-3 connects, the outlet of the first check valve 6-1 also is connected with Intermediate Heat Exchanger 5 pipe side entrances simultaneously with the outlet of the second check valve 6-2 is in parallel, intercooler 5 pipe side outlets and first expansion valve 7-1 inlet, the second expansion valve 7-2 connection that enters the mouth, first expansion valve 7-1 outlet is connected with intercooler 5 shell-side inlet, and second expansion valve 7-2 outlet enters the mouth with the 3rd check valve 6-3 respectively, the 4th check valve 6-4 connection that enters the mouth.

The twin-stage compressing hot pump system of not exclusively cooling off in the middle of the one-level throttling shown in Figure 2 can realize single stage compress kind of refrigeration cycle, single stage compress heat pump cycle, twin-stage compression refrigeration circulation, the circulation of twin-stage compressing hot pump.Running situation is as follows:

When 1, system was the single stage compress kind of refrigeration cycle: first heat exchanger 4 was condenser, and second heat exchanger 8 is an evaporimeter.Each first magnetic valve 3-1 that organizes compressor bank opens, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, after cold-producing medium is compressed to high-pressure by compressor 1, through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface, enter condensation heat release in first heat exchanger 4 behind four-way change-over valve 2 second interfaces, condensed refrigerant liquid enters intercooler 5 pipe side-entrances through the first check valve 6-1, after coming out, middle cooler 5 pipe side outlets are depressurized to low pressure by the second choke valve 7-2 throttling, enter evaporation heat absorption in second heat exchanger 8 through the 3rd check valve 6-3, produce the refrigeration phenomenon, pass through the 3rd interface of four-way change-over valve 2 again, first interface of four-way change-over valve 2 and the 4th magnetic valve 3-4 get back in the compressor 1, finish kind of refrigeration cycle.

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, high-pressure refrigerant after the 4 condensation heat releases of first heat exchanger enters from the pipe side-entrance of middle cooler 5 through the first check valve 6-1, cross through heat release and to flow out from the pipe side outlet of middle cooler 5 after cold, the high-pressure refrigerant that flows out is divided into two-way, one the tunnel enters intercooler 5 shell-side inlet after the pressure in the first expansion valve 7-1 is throttled to, the heat absorption back exports out from middle cooler 5 shell-sides.The throttling in the second choke valve 7-2 of another road is depressurized to low pressure, enter evaporation heat absorption in second heat exchanger 8 through the 3rd check valve 6-3, produce the refrigeration phenomenon, low-pressure refrigerant vapor after the heat absorption enters in the low-pressure stage compressor through four-way change-over valve 2 the 3rd interface, four-way change-over valve 2 first interfaces and the 4th magnetic valve 3-4, the middle compacting cryogen that the low-pressure stage compressor compresses goes out through the second magnetic valve 3-2 with export out from middle cooler 5 shell-sides the compacting cryogen be mixed into the suction end of hiigh pressure stage compressor.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, from the low-pressure stage compressor compresses go out compacting cryogen and the intercooler 5 shell-sides middle compacting cryogen that exports out mix after the 3rd magnetic valve 3-3 that is connected with the hiigh pressure stage compressor enters the hiigh pressure stage compressor, be compressed into cold-producing medium behind the high-pressure through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface, four-way change-over valve 2 second interfaces enter condensation heat release in first heat exchanger 4.

When 3, system was the single stage compress heat pump cycle: first heat exchanger 4 was evaporimeter, and second heat exchanger 8 is a condenser.Each first magnetic valve 3-1 that organizes compressor bank opens, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, after cold-producing medium is compressed to high-pressure by compressor 1, through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface, four-way change-over valve 2 the 3rd interface enters condensation heat release in second heat exchanger 8, generation heats phenomenon, condensed refrigerant liquid enters intercooler 5 pipe side-entrances through the second check valve 6-2, after coming out, middle cooler 5 pipe side outlets are depressurized to low pressure by the second choke valve 7-2 throttling, enter evaporation heat absorption in first heat exchanger 4 through the 4th check valve 6-4, pass through second interface of four-way change-over valve 2 again, first interface of four-way change-over valve 2 and the 4th magnetic valve 3-4 get back in the compressor 1, finish heat pump cycle.

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, high-pressure refrigerant after the 8 condensation heat releases of second heat exchanger enters from middle cooler 5 pipe side-entrances through the second check valve 6-2, cross through heat release and to flow out from the pipe side outlet of middle cooler 5 after cold, the high-pressure refrigerant that flows out is divided into two-way, one the tunnel enters intercooler 5 shell-side inlet behind the pressure pressure in the first expansion valve 7-1 is throttled to, the heat absorption back exports out from middle cooler 5 shell-sides.The throttling in the second choke valve 7-2 of another road is depressurized to low pressure, enter evaporation heat absorption in first heat exchanger 4 through the 4th check valve 6-4, low-pressure refrigerant vapor after the heat absorption enters in the low-pressure stage compressor through four-way change-over valve 2 second interfaces, four-way change-over valve 2 first interfaces and the 4th magnetic valve 3-4, the middle compacting cryogen that the low-pressure stage compressor compresses goes out through the second magnetic valve 3-2 with export out from middle cooler 5 shell-sides the compacting cryogen be mixed into the suction end of hiigh pressure stage compressor.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, first interface communicates with second interface in the four-way change-over valve 2, the 3rd interface communicates with the 4th interface, from the low-pressure stage compressor compresses go out compacting cryogen and the intercooler 5 shell-sides middle compacting cryogen that exports out mix after the 3rd magnetic valve 3-3 that is connected with the hiigh pressure stage compressor enters the hiigh pressure stage compressor, be compressed into cold-producing medium behind the high-pressure through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface, four-way change-over valve 2 the 3rd interface enters condensation heat release in second heat exchanger 8, produces to heat phenomenon.

Embodiment 3

Fig. 3 is the middle schematic diagram of the twin-stage compressing hot pump system of cooling fully of one-level throttling, comprises many group compressor bank, first heat exchanger 4, second heat exchanger 8, intercoolers 5, and intercooler is the shell and tube exchanger that has liquid level.Every group of compressor bank comprises compressor 1, four-way change-over valve 2, the first magnetic valve 3-1, the second magnetic valve 3-2, the 3rd magnetic valve 3-3, the 4th magnetic valve 3-4, the suction end of compressor 1 is connected with the 4th magnetic valve 3-4 with the 3rd magnetic valve 3-3 respectively, the first magnetic valve 3-1 of every group of compressor bank is connected with the 4th interface 2-4 of four-way change-over valve 2, be connected with the liquid level below shell-side inlet of intercooler 5 after the second magnetic valve 3-2 parallel connection, be connected with the shell-side gaseous phase outlet of intercooler 5 after the 3rd magnetic valve 3-3 parallel connection, the 4th magnetic valve 3-4 is connected with the first interface 2-1 of four-way change-over valve 2, be connected with second interface of first heat exchanger 4 after the second interface 2-2 parallel connection of the four-way change-over valve 2 of every group of compressor bank, be connected with second interface of second heat exchanger 8 after the 3rd interface 2-3 parallel connection of four-way change-over valve 2, first interface of first heat exchanger 4 respectively with the inlet of the first check valve 6-1, the outlet of the 4th check valve 6-4 connects, first interface of second heat exchanger 8 respectively with the inlet of the second check valve 6-2, the outlet of the 3rd check valve 6-3 connects, the pipe side entrance of first check valve 6-1 outlet also while in parallel and Intermediate Heat Exchanger 5 with second check valve 6-2 outlet, the inlet of the first expansion valve 7-1 connects, the outlet of the first expansion valve 7-1 is connected with the shell-side inlet of intercooler 5, the pipe side outlet of intercooler 5 is connected with the inlet of the second expansion valve 7-2, and the outlet of the second expansion valve 7-2 enters the mouth with the 3rd check valve 6-3 respectively, the 4th check valve 6-4 connection that enters the mouth.

The twin-stage compressing hot pump system of cooling off fully in the middle of the one-level throttling shown in Figure 3 can realize single stage compress kind of refrigeration cycle, single stage compress heat pump cycle, twin-stage compression refrigeration circulation, the circulation of twin-stage compressing hot pump.Running situation is as follows:

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, high-pressure refrigerant after the 4 condensation heat releases of first heat exchanger is divided into two-way behind the first check valve 6-1, one the tunnel enters intercooler 5 shell-side inlet behind the pressure pressure in the first expansion valve 7-1 is throttled to, come out from middle cooler 5 shell-side gaseous phase outlets in the heat absorption back, enter hiigh pressure stage compressor air suction mouth, another road enters from the pipe side-entrance of middle cooler 5, cross through heat release and to flow out from the pipe side outlet of middle cooler 5 after cold, throttling is depressurized to low pressure in the second choke valve 7-2, enter evaporation heat absorption in second heat exchanger 8 through the 3rd check valve 6-3, produce the refrigeration phenomenon, low-pressure refrigerant vapor after the heat absorption is through four-way change-over valve 2 the 3rd interface, four-way change-over valve 2 first interfaces and the 4th magnetic valve 3-4 enter in the low-pressure stage compressor, and the middle compacting cryogen that the low-pressure stage compressor compresses goes out enters the intercooler 5 from middle cooler 5 liquid levels below shell-side inlet through the second magnetic valve 3-2.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, from middle cooler 5 shell-side gaseous phase outlets come out the compacting cryogen enter the hiigh pressure stage compressor through the 3rd magnetic valve 3-3 that is connected with the hiigh pressure stage compressor, be compressed into cold-producing medium behind the high-pressure through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface, four-way change-over valve 2 second interfaces enter condensation heat release in first heat exchanger 4.

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, high-pressure refrigerant after the 8 condensation heat releases of second heat exchanger is divided into two-way behind the second check valve 6-2, one the tunnel enters intercooler 5 shell-side inlet behind the pressure pressure in the first expansion valve 7-1 is throttled to, the heat absorption back exports out from middle cooler 5 shell-sides.Another road enters from the pipe side-entrance of middle cooler 5, cross to come out from the shell-side gaseous phase outlet of middle cooler 5 after cold through heat release, enter hiigh pressure stage compressor air suction mouth, another road enters from the pipe side-entrance of middle cooler 5, cross through heat release and to flow out from the pipe side outlet of middle cooler 5 after cold, throttling is depressurized to low pressure in the second choke valve 7-2, enter evaporation heat absorption in first heat exchanger 4 through the 4th check valve 6-4, low-pressure refrigerant vapor after the heat absorption is through four-way change-over valve 2 second interfaces, four-way change-over valve 2 first interfaces and the 4th magnetic valve 3-4 enter in the low-pressure stage compressor, and the middle compacting cryogen that the low-pressure stage compressor compresses goes out enters the intercooler 5 from middle cooler 5 liquid levels below shell-side inlet through the second magnetic valve 3-2.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, first interface communicates with second interface in the four-way change-over valve 2, the 3rd interface communicates with the 4th interface, from middle cooler 5 shell-side gaseous phase outlets come out the compacting cryogen enter the hiigh pressure stage compressor through the 3rd magnetic valve 3-3 that is connected with the hiigh pressure stage compressor, be compressed into cold-producing medium behind the high-pressure through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface, four-way change-over valve 2 the 3rd interface enters condensation heat release in second heat exchanger 8, produces to heat phenomenon.

Embodiment 4

Fig. 4 is the schematic diagram of the twin-stage compressing hot pump system of incomplete cooling in the middle of the two-step throttle, comprises many group compressor bank, first heat exchanger 4, second heat exchanger 8, intercoolers 5, and intercooler is the water storage type heat exchanger.Every group of compressor bank comprises compressor 1, four-way change-over valve 2, the first magnetic valve 3-1, the second magnetic valve 3-2, the 3rd magnetic valve 3-3, the 4th magnetic valve 3-4, the exhaust end of compressor 1 is connected with the second magnetic valve 3-2 with the first magnetic valve 3-1 respectively, the suction end of compressor 1 is connected with the 4th magnetic valve 3-4 with the 3rd magnetic valve 3-3 respectively, the first magnetic valve 3-1 of every group of compressor bank is connected with the 4th interface 2-4 of four-way change-over valve 2, be connected with the gaseous phase outlet of intercooler 5 after the second magnetic valve 3-2 parallel connection, be connected with the gaseous phase outlet of intercooler 5 after the 3rd magnetic valve 3-3 parallel connection, the 4th magnetic valve 3-4 is connected with the first interface 2-1 of four-way change-over valve 2, be connected with second interface of first heat exchanger 4 after the second interface 2-2 parallel connection of the four-way change-over valve 2 of every group of compressor bank, be connected with second interface of second heat exchanger 8 after the 3rd interface 2-3 parallel connection of four-way change-over valve 2, first interface of first heat exchanger 4 respectively with the inlet of the first check valve 6-1, the outlet of the 4th check valve 6-4 connects, first interface of second heat exchanger 8 respectively with the inlet of the second check valve 6-2, the outlet of the 3rd check valve 6-3 connects, first check valve 6-1 outlet also is connected with first expansion valve 7-1 inlet simultaneously with second check valve 6-2 outlet is in parallel, the outlet of the first expansion valve 7-1 is connected with the shell-side inlet of intercooler 5, the liquid phase outlet of intercooler 5 is connected with the inlet of the second expansion valve 7-2, and the outlet of the second expansion valve 7-2 enters the mouth with the 3rd check valve 6-3 respectively, the 4th check valve 6-4 connection that enters the mouth.

The twin-stage compressing hot pump system of not exclusively cooling off in the middle of the two-step throttle shown in Figure 4 can realize single stage compress kind of refrigeration cycle, single stage compress heat pump cycle, twin-stage compression refrigeration circulation, the circulation of twin-stage compressing hot pump.Running situation is as follows:

When 1, system was the single stage compress kind of refrigeration cycle: first heat exchanger 4 was condenser, and second heat exchanger 8 is an evaporimeter.Each first magnetic valve 3-1 that organizes compressor bank opens, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, after cold-producing medium is compressed to high-pressure by compressor 1, through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface 2-4, enter condensation heat release in first heat exchanger 4 behind the four-way change-over valve 2 second interface 2-2, condensed refrigerant liquid enters through the first check valve 6-1 and enters the intercooler 5 from middle cooler 5 shell-side inlet behind the pressure pressure in being throttled among the first throttle valve 7-1, from middle cooler 5 liquid phases export out the compacting cryogen be depressurized to low pressure by the second choke valve 7-2 throttling, enter evaporation heat absorption in second heat exchanger 8 through the 3rd check valve 6-3, produce the refrigeration phenomenon, pass through the 3rd interface 2-3 of four-way change-over valve 2 again, the first interface 2-1 and the 4th magnetic valve 3-4 of four-way change-over valve 2 get back in the compressor 1, finish kind of refrigeration cycle.

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, high-pressure refrigerant after the 4 condensation heat releases of first heat exchanger enters intercooler 5 shell-side inlet behind the pressure pressure in the first check valve 6-1 is throttled to by the first expansion valve 7-1, the compacting cryogen flows out from the liquid phase outlet of middle cooler 5 in the liquid phase, throttling is depressurized to low pressure in the second choke valve 7-2, enter evaporation heat absorption in second heat exchanger 8 through the 3rd check valve 6-3, produce the refrigeration phenomenon, low-pressure refrigerant vapor after the heat absorption is through four-way change-over valve 2 the 3rd interface 2-3, four-way change-over valve 2 first interface 2-1 and the 4th magnetic valve 3-4 enter in the low-pressure stage compressor, the middle compacting cryogen that the low-pressure stage compressor compresses goes out through the second magnetic valve 3-2 with come out from middle cooler 5 gaseous phase outlets the compacting cryogen be mixed into the suction end of hiigh pressure stage compressor.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, from the low-pressure stage compressor compresses go out the middle compacting cryogen that comes out of compacting cryogen and intercooler 5 gaseous phase outlets mix after the 3rd magnetic valve 3-3 that is connected with the hiigh pressure stage compressor enters the hiigh pressure stage compressor, be compressed into cold-producing medium behind the high-pressure through first magnetic valve, four-way change-over valve 2 the 4th interface 2-4, four-way change-over valve 2 second interface 2-2 enter condensation heat release in first heat exchanger 4.

When 3, system was the single stage compress heat pump cycle: first heat exchanger 4 was evaporimeter, and second heat exchanger 8 is a condenser.Each first magnetic valve 3-1 that organizes compressor bank opens, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, after cold-producing medium is compressed to high-pressure by compressor 1, through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface 2-4, enter condensation heat release in second heat exchanger 8 behind four-way change-over valve 2 the 3rd interface 2-3, generation heats phenomenon, condensed refrigerant liquid enters intercooler 5 shell-side inlet behind the pressure pressure in the second check valve 6-2 is throttled to by first throttle valve 7-1, from middle cooler 5 liquid phases export out the back by the second choke valve 7-2 once more throttling to low pressure, enter evaporation heat absorption in first heat exchanger 4 through the 4th check valve 6-4, pass through the second interface 2-2 of four-way change-over valve 2 again, the first interface 2-1 and the 4th magnetic valve 3-4 of four-way change-over valve 2 get back in the compressor 1, finish heat pump cycle.

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, high-pressure refrigerant after the 8 condensation heat releases of second heat exchanger enters intercooler 5 shell-side inlet behind the pressure pressure in the second check valve 6-2 is throttled to by the first expansion valve 7-1, the compacting cryogen flows out from the liquid phase outlet of middle cooler 5 in the liquid phase, throttling is depressurized to low pressure in the second choke valve 7-2, enter evaporation heat absorption in first heat exchanger 4 through the 4th check valve 6-4, low-pressure refrigerant vapor after the heat absorption is through four-way change-over valve 2 second interface 2-2, four-way change-over valve 2 first interface 2-1 and the 4th magnetic valve 3-4 enter in the low-pressure stage compressor, the middle compacting cryogen that the low-pressure stage compressor compresses goes out through the second magnetic valve 3-2 with come out from middle cooler 5 gaseous phase outlets the compacting cryogen be mixed into the suction end of hiigh pressure stage compressor.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, from the low-pressure stage compressor compresses go out the middle compacting cryogen that comes out of compacting cryogen and intercooler 5 gaseous phase outlets mix after the 3rd magnetic valve 3-3 that is connected with the hiigh pressure stage compressor enters the hiigh pressure stage compressor, be compressed into cold-producing medium behind the high-pressure through first magnetic valve, four-way change-over valve 2 the 4th interface 2-4, four-way change-over valve 2 the 3rd interface 2-3 enters condensation heat release in second heat exchanger 8, produces to heat phenomenon.

Embodiment 5

Fig. 5 is the middle schematic diagram of the twin-stage compressing hot pump system of cooling fully of two-step throttle, comprises many group compressor bank, first heat exchanger 4, second heat exchanger 8, intercoolers 5, and intercooler is the water storage type heat exchanger.Every group of compressor bank comprises compressor 1, four-way change-over valve 2, the first magnetic valve 3-1, the second magnetic valve 3-2, the 3rd magnetic valve 3-3, the 4th magnetic valve 3-4, the exhaust end of compressor 1 is connected with the second magnetic valve 3-2 with the first magnetic valve 3-1 respectively, the suction end of compressor 1 is connected with the 4th magnetic valve 3-4 with the 3rd magnetic valve 3-3 respectively, the first magnetic valve 3-1 of every group of compressor bank is connected with the 4th interface of four-way change-over valve 2, be connected with the liquid level below shell-side inlet of intercooler 5 after the second magnetic valve 3-2 parallel connection, be connected with the gaseous phase outlet of intercooler 5 after the 3rd magnetic valve 3-3 parallel connection, the 4th magnetic valve 3-4 is connected with the first interface 2-1 of four-way change-over valve 2, be connected with second interface of first heat exchanger 4 after the second interface 2-2 parallel connection of the four-way change-over valve 2 of every group of compressor bank, be connected with second interface of second heat exchanger 8 after the 3rd interface 2-3 parallel connection of four-way change-over valve 2, first interface of first heat exchanger 4 respectively with the inlet of the first check valve 6-1, the outlet of the 4th check valve 6-4 connects, first interface of second heat exchanger 8 respectively with the inlet of the second check valve 6-2, the outlet of the 3rd check valve 6-3 connects, the outlet of the first check valve 6-3 also is connected with first expansion valve 7-1 inlet simultaneously with the outlet of the second check valve 6-2 is in parallel, the outlet of the first expansion valve 7-1 is connected with the shell-side inlet of intercooler 5, the liquid phase outlet of intercooler 5 is connected with the 7-2 inlet of second expansion valve, and the outlet of the second expansion valve 7-2 enters the mouth with the 3rd check valve 6-3 respectively, the 4th check valve 6-4 connection that enters the mouth.

The twin-stage compressing hot pump system of cooling off fully in the middle of the two-step throttle shown in Figure 5 can realize single stage compress kind of refrigeration cycle, single stage compress heat pump cycle, twin-stage compression refrigeration circulation, the circulation of twin-stage compressing hot pump.Running situation is as follows:

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, high-pressure refrigerant after the 4 condensation heat releases of first heat exchanger enters intercooler 5 shell-side inlet behind the pressure pressure in the first check valve 6-1 is throttled to by the first expansion valve 7-1, the compacting cryogen flows out from the liquid phase outlet of middle cooler 5 in the liquid phase, throttling is depressurized to low pressure in the second choke valve 7-2, enter evaporation heat absorption in second heat exchanger 8 through the 3rd check valve 6-3, produce the refrigeration phenomenon, low-pressure refrigerant vapor after the heat absorption is through four-way change-over valve 2 the 3rd interface 2-3, four-way change-over valve 2 first interface 2-1 and the 4th magnetic valve 3-4 enter in the low-pressure stage compressor, and the middle compacting cryogen that the low-pressure stage compressor compresses goes out enters the intercooler 5 from middle cooler 5 liquid levels below shell-side inlet through the second magnetic valve 3-2.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, the first interface 2-1 communicates with the 3rd interface 2-3 in the four-way change-over valve 2, the second interface 2-2 communicates with the 4th interface 2-4, from middle cooler 5 gaseous phase outlets come out the compacting cryogen enter the hiigh pressure stage compressor through the 3rd magnetic valve 3-3 that is connected with the hiigh pressure stage compressor, be compressed into cold-producing medium behind the high-pressure through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface 2-4, four-way change-over valve 2 second interface 2-2 enter condensation heat release in first heat exchanger 4.

The circulation of low-pressure stage compressor section is: close with the first magnetic valve 3-1 that is connected as the low-pressure stage compressor, the second magnetic valve 3-2 opens, the 3rd magnetic valve 3-3 closes, the 4th magnetic valve 3-4 opens, the first interface 2-1 communicates with the second interface 2-2 in the four-way change-over valve 2, the 3rd interface 2-3 communicates with the 4th interface 2-4, high-pressure refrigerant after the 8 condensation heat releases of second heat exchanger enters intercooler 5 shell-side inlet behind the pressure pressure in the second check valve 6-2 is throttled to by the first expansion valve 7-1, the compacting cryogen flows out from the liquid phase outlet of middle cooler 5 in the liquid phase, throttling is depressurized to low pressure in the second choke valve 7-2, enter evaporation heat absorption in first heat exchanger 4 through the 4th check valve 6-4, low-pressure refrigerant vapor after the heat absorption is through four-way change-over valve 2 second interfaces, four-way change-over valve 2 first interfaces and the 4th magnetic valve 3-4 enter in the low-pressure stage compressor, and stage compressor compresses the middle compacting cryogen that and enters the intercooler 5 from middle cooler 5 liquid levels below shell-side inlet through the second magnetic valve 3-2.

The circulation of hiigh pressure stage compressor section is: open with the first magnetic valve 3-1 that is connected as the hiigh pressure stage compressor, the second magnetic valve 3-2 closes, the 3rd magnetic valve 3-3 opens, the 4th magnetic valve 3-4 closes, first interface communicates with second interface in the four-way change-over valve 2, the 3rd interface communicates with the 4th interface, from middle cooler 5 gaseous phase outlets come out the compacting cryogen enter the hiigh pressure stage compressor through the 3rd magnetic valve 3-3 that is connected with the hiigh pressure stage compressor, be compressed into cold-producing medium behind the high-pressure through the first magnetic valve 3-1, four-way change-over valve 2 the 4th interface, four-way change-over valve 2 the 3rd interface enters condensation heat release in second heat exchanger 8, produces to heat phenomenon.

Compressor of the present utility model is a prior art, and compressed format is not limit, and can be displacement type or velocity profile.Can be invariable frequency compressor, also can be frequency-changeable compressor or DC speed regulation compressor.Can be the constant flow compressor, also can be the unsteady flow capacity compressor.

Magnetic valve of the present utility model is a prior art.In system, can replace with three-way diverter valve or four-way change-over valve.

First heat exchanger 4 of the present utility model and second heat exchanger 6 are prior art, and the heat exchanger form is not limit.Can be shell-tube type, bushing type, also can be finned, around chip or other forms of surface-cooler.

Choke valve in the utility model is a prior art, and form do not limit, and can be capillary, heating power expansion valve, electric expansion valve, also can be throttle orifice plate apparatus etc.

Cold-producing medium in the utility model can be an inorganic matter, also can be organic matter.

Claims

1. the incomplete twin-stage compressing hot pump system of cooling in the middle of the one-level throttling, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the shell-side outlet of intercooler after the second magnetic valve parallel connection, be connected with the shell-side outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve also is connected with first expansion valve inlet with Intermediate Heat Exchanger pipe side entrance simultaneously with the outlet of second check valve is in parallel, the outlet of first expansion valve is connected with the intercooler shell-side inlet, intercooler pipe side outlet is connected with second expansion valve inlet, and the outlet of second expansion valve is connected with the 4th check valve inlet with the 3rd check valve inlet respectively.

2. the incomplete twin-stage compressing hot pump system of cooling in the middle of the one-level throttling, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the shell-side outlet of intercooler after the second magnetic valve parallel connection, be connected with the shell-side outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve also is connected with Intermediate Heat Exchanger pipe side entrance simultaneously with the outlet of second check valve is in parallel, the pipe side outlet of intercooler enters the mouth with first expansion valve respectively, second expansion valve inlet connects, the outlet of first expansion valve is connected with the intercooler shell-side inlet, and the outlet of second expansion valve enters the mouth with the 3rd check valve respectively, the 4th check valve inlet connects.

3. the twin-stage compressing hot pump system of cooling fully in the middle of the one-level throttling, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the liquid level below shell-side inlet of intercooler after the second magnetic valve parallel connection, be connected with the shell-side gaseous phase outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve in parallel with the outlet of second check valve and simultaneously with the pipe side entrance of Intermediate Heat Exchanger, the inlet of first expansion valve connects, the outlet of first expansion valve is connected with the shell-side inlet of intercooler, the pipe side outlet of intercooler is connected with second expansion valve inlet, and the outlet of second expansion valve enters the mouth with the 3rd check valve respectively, the 4th check valve inlet connects.

4. the incomplete twin-stage compressing hot pump system of cooling in the middle of the two-step throttle, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the gaseous phase outlet of intercooler after the second magnetic valve parallel connection, be connected with the gaseous phase outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve also is connected with first expansion valve inlet simultaneously with the outlet of second check valve is in parallel, the outlet of first expansion valve is connected with the shell-side inlet of intercooler, the liquid phase outlet of intercooler is connected with second expansion valve inlet, and the outlet of second expansion valve enters the mouth with the 3rd check valve respectively, the 4th check valve inlet connects.

5. the twin-stage compressing hot pump system of cooling fully in the middle of the two-step throttle, it is characterized in that, comprise many group compressor bank, first heat exchanger, second heat exchanger, intercooler, every group of compressor bank comprises compressor, four-way change-over valve, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the exhaust end of compressor is connected with second magnetic valve with first magnetic valve respectively, the suction end of compressor is connected with the 4th magnetic valve with the 3rd magnetic valve respectively, first magnetic valve of every group of compressor bank is connected with the 4th interface of four-way change-over valve, be connected with the liquid level below shell-side inlet of intercooler after the second magnetic valve parallel connection, be connected with the gaseous phase outlet of intercooler after the 3rd magnetic valve parallel connection, the 4th magnetic valve is connected with first interface of four-way change-over valve, be connected with second interface of first heat exchanger after the second interface parallel connection of the four-way change-over valve of every group of compressor bank, be connected with second interface of second heat exchanger after the 3rd interface parallel connection of four-way change-over valve, first interface of first heat exchanger respectively with the inlet of first check valve, the outlet of the 4th check valve connects, first interface of second heat exchanger respectively with the inlet of second check valve, the outlet of the 3rd check valve connects, the outlet of first check valve also is connected with first expansion valve inlet simultaneously with the outlet of second check valve is in parallel, the outlet of first expansion valve is connected with the shell-side inlet of intercooler, the liquid phase outlet of intercooler is connected with second expansion valve inlet, and the outlet of second expansion valve enters the mouth with the 3rd check valve respectively, the 4th check valve inlet connects.