CN101968289A

CN101968289A - Air conditioning and refrigerating equipment

Info

Publication number: CN101968289A
Application number: CN2010105412442A
Authority: CN
Inventors: 刘雄
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-09
Filing date: 2010-11-09
Publication date: 2011-02-09
Also published as: CN102072587B; CN102072587A

Abstract

The invention discloses air conditioning and refrigerating equipment which comprises a compressor, a first four-way valve, a first throttle mechanism, a second throttle mechanism, a user-side heat exchanger, a heat source-side heat exchanger, a heater, a first flow direction control valve and a second flow direction control valve. The compressor is provided with three connection points, namely, a high-pressure connection point, a low-pressure connection point and a normally-open connection point, wherein, the high-pressure connection point of the compressor is connected with a high-pressure node of the first four-way valve through a 60th pipe; the low-pressure connection point of the compressor is connected with a low-pressure node of the first four-way valve through a 63rd pipe; and the normally-open connection point of the compressor is connected with any one of the two reversing nodes of the first four-way valve through a 67th pipe, the heat source-side heat exchanger, the second throttle mechanism, a 58th pipe, a 57th pipe, the first throttle mechanism, the user-side heat exchanger and a 64th pipe sequentially. The air conditioning and refrigerating equipment has the advantages of simple structure, reliable operation and low cost and can realize various functions of refrigerating, heating, producing domestic hot water and the like.

Description

Operation of air conditioning systems

Technical field

The present invention relates to a kind of operation of air conditioning systems, belong to refrigeration technology field with multiple function.

Background technology

The air conditioner for both refrigeration plant of forming by compressing mechanism, four-way changement, heat source side heat exchanger, user side heat exchanger and throttle mechanism in summer in winter all the time, when being used to freeze, utilize the user side heat exchanger that room air is cooled off or produce chilled water, the condensation heat that refrigeration is produced enters environment (as: outdoor air, surface water, underground water or soil etc.) by heat source side heat exchanger; When being used to heat, utilize heat source side heat exchanger, heat by user side heat exchanger production hot water or to room air again from the environment draw heat.As everyone knows, above-mentioned operation of air conditioning systems can only satisfy the unitary demand of refrigeration or heating when work, can't satisfy user's refrigeration, heating and domestic hot-water's demand in the whole year operation process.

Summary of the invention

The purpose of this invention is to provide and a kind ofly can in the whole year operation process, satisfy the operation of air conditioning systems of user's refrigeration, heating and domestic hot-water's demand.

In order to overcome the problem that above-mentioned technology exists, the technical scheme of technical solution problem of the present invention is:

1, a kind of operation of air conditioning systems, comprise compression set, first cross valve, user side heat exchanger, heat source side heat exchanger and first throttle mechanism, it is characterized in that: this operation of air conditioning systems also comprises second throttle mechanism, heater, first flow direction control valve and second flow direction control valve; Described compression set has high pressure tie point, low pressure tie point, often opens three connected nodes of tie point; The high pressure tie point of described compression set links to each other with the high pressure node of first cross valve by the 60 pipeline, the low pressure tie point of described compression set links to each other with the low pressure node of first cross valve by the 63 pipeline, the tie point of often opening of described compression set passes through the 67 pipeline successively, heat source side heat exchanger, second throttle mechanism, the 58 pipeline, the 57 pipeline, first throttle mechanism, the user side heat exchanger, any one node in two commutations of the 64 pipeline and first cross valve node links to each other, another node of described first cross valve is successively by the 61 pipeline, first flow direction control valve, second flow direction control valve, the 62 pipeline links to each other with the 64 pipeline that the user side heat exchanger and first cross valve commutate between the node, described heater one end links to each other with pipeline between first flow direction control valve and second flow direction control valve by the 51 pipeline, and the described heater other end linked to each other with the 58 pipeline with the 57 pipeline by the 52 pipeline while.

2, a kind of operation of air conditioning systems, comprise compression set, first cross valve, user side heat exchanger, heat source side heat exchanger and first throttle mechanism, it is characterized in that: this operation of air conditioning systems also comprises second throttle mechanism, the 3rd throttle mechanism, heater, first flow direction control valve and second flow direction control valve; Described compression set has high pressure tie point, low pressure tie point, often opens three connected nodes of tie point; The high pressure tie point of described compression set links to each other with the high pressure node of first cross valve by the 60 pipeline, the low pressure tie point of described compression set links to each other with the low pressure node of first cross valve by the 63 pipeline, the tie point of often opening of described compression set passes through the 67 pipeline successively, heat source side heat exchanger, second throttle mechanism, the 58 pipeline, the 57 pipeline, first throttle mechanism, the user side heat exchanger, any one node in two commutations of the 64 pipeline and first cross valve node links to each other, another node of described first cross valve is successively by the 61 pipeline, first flow direction control valve, second flow direction control valve, the 62 pipeline links to each other with the 64 pipeline that the user side heat exchanger and first cross valve commutate between the node, described heater one end links to each other with pipeline between first flow direction control valve and second flow direction control valve by the 51 pipeline, and the described heater other end passes through the 3rd throttle mechanism, the 52 pipeline links to each other with the 58 pipeline with the 57 pipeline simultaneously.

The present invention compared with prior art, its beneficial effect is:

1. in running, multiple function be can realize as required, hot water, refrigeration or heating produced;

2. can recycle the low temperature exhaust heat that operation of air conditioning systems is produced in running;

3. simple in structure, reliable operation, with low cost;

4. the present invention is applicable to industry and civilian operation of air conditioning systems, is specially adapted to the occasion of refrigeration, heating and domestic hot-water's demand.

Description of drawings

Fig. 1 is the embodiment of the invention 1 structural representation;

Fig. 2 is the embodiment of the invention 2 structural representations;

Fig. 3 is the embodiment of the invention 3 structural representations;

Fig. 4 is the embodiment of the invention 4 structural representations;

Fig. 5 is the embodiment of the invention 5 structural representations;

Fig. 6 is the embodiment of the invention 6 structural representations.

The specific embodiment

Below in conjunction with accompanying drawing content of the present invention is described in further detail.

Embodiment 1

As shown in Figure 1, entire equipment comprises following part: compression set 1, cross valve 2, first throttle mechanism 4, second throttle mechanism 5, user side heat exchanger 3, heat source side heat exchanger 6, heater 8, first flow direction control valve 41 and second flow direction control valve 42; First throttle mechanism 4, second throttle mechanism 5, first flow direction control valve 41 and second flow direction control valve 42 are electric expansion valve.

Compression set 1 has high pressure tie point B, low pressure tie point C, often opens three connected nodes of tie point A, is made up of low pressure compressor 1-1, high pressure compressor 1-2 and the 3rd check valve 23; Their connected mode is as follows: the arrival end of low pressure compressor 1-1 links to each other with the low pressure tie point C of compression set 1, the port of export of low pressure compressor 1-1 is by high pressure compressor 1-2 arrival end, the high pressure compressor 1-2 port of export links to each other with the high pressure tie point B of compression set 1, the 3rd check valve 23 arrival ends link to each other with pipeline between the low pressure compressor 1-1 port of export and the high pressure compressor 1-2 arrival end, pipeline between the high pressure tie point B of the 3rd check valve 23 ports of export and the high pressure compressor 1-2 port of export and compression set 1 links to each other, compression set 1 often open tie point A by the pipeline between the 59 pipeline 59 and the low pressure compressor 1-1 port of export and the high pressure compressor 1-2 arrival end, or the pipeline between the low pressure compressor 1-1 port of export and the 3rd check valve 23 arrival ends links to each other.

The user side heat exchanger is user's refrigeration as evaporimeter 3 summers, and be user heating as condenser winter; Heat source side heat exchanger 6 both can be used as condenser, distributed the condensation heat that refrigeration produces in environment, also can be used as evaporimeter, absorbed heat from environment, was user's heating or production hot water; Heater 8 is hot-water heaters, and produce hot water for the user whole year.This operation of air conditioning systems can realize multiple function, and the workflow under each function is as described below respectively.

(1) separate refrigeration

Under this function, the condensation heat that refrigeration is produced all enters environment (outdoor air or cooling water or soil etc.) by heat source side heat exchanger 6, and user side heat exchanger 3 is user's cooling.During work, first throttle mechanism 4 operate as normal, second throttle mechanism, 5 standard-sized sheets, first flow direction control valve 41 and second flow direction control valve 42 are closed, and low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, through the low pressure tie point C that often opens tie point A, the 67 pipeline 67, heat source side heat exchanger 6, second throttle mechanism the 5, the 58 pipeline the 58, the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger the 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes the 73, the 63 pipeline 63, compression set 1 of the 59 pipeline 59, compression set 1, get back to low pressure compressor 1-1 arrival end successively.

(2) hot water is produced in the double full recuperation of heat of refrigeration

Under this function, whole condensation heat that heater 8 utilizes refrigeration to be produced are produced hot water; User side heat exchanger 3 is user's cooling.

Scheme one (single stage compress)

During work, first throttle mechanism 4 operate as normal, second throttle mechanism 5 cuts out, first flow direction control valve, 41 standard-sized sheets, second flow direction control valve 42 is closed, and low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first flow direction control valve 41, the 51 pipeline 51, heater 8, the 52 pipeline 52, the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1 gets back to low pressure compressor 1-1 arrival end.

Scheme two (twin-stage compression)

During work, first throttle mechanism 4 operate as normal, second throttle mechanism 5 cuts out, first flow direction control valve, 41 standard-sized sheets, second flow direction control valve 42 is closed, and low pressure compressor 1-1, high pressure compressor 1-2 normally move.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first flow direction control valve 41, the 51 pipeline 51, heater 8, the 52 pipeline 52, the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export is got back to high pressure compressor 1-2 arrival end.

(3) hot water is produced in the double partly recuperation of heat of refrigeration

Under this function, the part condensation heat that heater 8 utilizes refrigeration to be produced is produced hot water, and another part condensation heat enters environment by heat source side heat exchanger 6, and user side heat exchanger 3 is user's cooling.During work, first throttle mechanism 4, second throttle mechanism 5, first flow direction control valve 41 be operate as normal all, second throttle mechanism 5 and first flow direction control valve 41 are respectively applied for the refrigerant flow of regulating by heat source side heat exchanger 6 and heater 8, and first throttle mechanism 4 is used for the cold-producing medium throttling; Second flow direction control valve 42 is closed, and low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, be divided into two-way, one the tunnel successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first flow direction control valve 41, the 51 pipeline 51, heater 8, the 52 pipeline 52, enter the 57 pipeline 57, another road is successively through the 59 pipeline 59, compression set 1 often open tie point A, the 67 pipeline 67, heat source side heat exchanger 6, second throttle mechanism 5, the 58 pipeline 58, also enter the 57 pipeline 57, two-way is after the 57 pipeline 57 mixes, pass through first throttle mechanism 4 more successively, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1 gets back to low pressure compressor 1-1 arrival end.

(4) need freeze simultaneously by the user and produce hot water

Under this function, refrigerating capacity and hot water amount can be according to user's needs while independent regulation.At this moment, the cold-producing medium of medium temperature and medium pressure utilizes heat source side heat exchanger 6 draw heat from environment, the cold-producing medium of low-temp low-pressure utilizes user side heat exchanger 3 to be user's cooling, and condensation heat that refrigeration is produced and the heat of drawing from environment all are used to produce hot water in heater 8.During work, first throttle mechanism 4, second throttle mechanism 5 be operate as normal all, is respectively applied for the refrigerant flow of regulating by user side heat exchanger 3 and heat source side heat exchanger 6; First flow direction control valve, 41 standard-sized sheets, second flow direction control valve 42 is closed, and low pressure compressor 1-1, high pressure compressor 1-2 normally move.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first flow direction control valve 41, the 51 pipeline 51, heater 8, the 52 pipeline 52, after coming out, the 52 pipeline 52 is divided into two-way, one the tunnel successively through the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, enter high pressure compressor 2-2 arrival end pipeline, another road is successively through the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export, also enter high pressure compressor 1-2 arrival end pipeline, two-way enters high pressure compressor 1-2 and is compressed once more after high pressure compressor 1-2 arrival end pipeline mixes.

(5) produce hot water separately

Under this function, heat source side heat exchanger 6 draw heat from environment utilizes the heat of drawing, and produces hot water in heater 8.During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 closes; First flow direction control valve, 41 standard-sized sheets, second flow direction control valve 42 is closed; Low pressure compressor 1-1 does not work, and high pressure compressor 1-2 normally moves.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, successively through the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes the 72, the 61 pipeline 61, first flow direction control valve the 41, the 51 pipeline 51, heater the 8, the 52 pipeline the 52, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger the 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, get back to high pressure compressor 1-2 arrival end.

(6) heating separately

Under this function, heat source side heat exchanger 6 draw heat from environment utilizes the heat of drawing, and is user's heating in user side heat exchanger 3.During work, first throttle mechanism 4 standard-sized sheets, second throttle mechanism, 5 operate as normal, first flow direction control valve 41 and second flow direction control valve 42 are closed; Low pressure compressor 1-1 does not work, and high pressure compressor 1-2 normally moves.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, successively through the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes the 74, the 64 pipeline 64, user side heat exchanger 3, first throttle mechanism the 4, the 57 pipeline the 57, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger the 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, get back to high pressure compressor 1-2 arrival end.

(7) heat simultaneously and produce hot water

Under this function, heat source side heat exchanger 6 draw heat from environment, the heat of being drawn, a part of is user's heating in user side heat exchanger 3, another part is produced hot water in heater 8.During work, first throttle mechanism 4, second throttle mechanism 5, second flow direction control valve 42 be operate as normal all, the first throttle mechanism 4 and second flow direction control valve 42 are respectively applied for the refrigerant flow of regulating by user side heat exchanger 3 and heater 8, and second throttle mechanism 5 is used for the cold-producing medium throttling; First flow direction control valve 41 is closed; Low pressure compressor 1-1 does not work, and high pressure compressor 1-2 normally moves.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, enter the 64 pipeline 64 and be divided into two-way, one the tunnel passes through user side heat exchanger 3 successively, first throttle mechanism 4, the 57 pipeline 57, enter the 58 pipeline 58, another road is successively through the 62 pipeline 62, second flow direction control valve 42, the 51 pipeline 51, heater 8, the 52 pipeline 52, also enter the 58 pipeline 58, two-way is after the 58 pipeline 58 mixes, again successively through second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59 is got back to high pressure compressor 1-2 arrival end.

(8) winter frost removing

Scheme one: when adopting contrary circulation hot gas defrosting, that is: when utilizing user side heat exchanger 3 from indoor draw heat defrost, its workflow is identical with the separate refrigeration function.

Scheme two: under this function, utilize heater 8 draw heat from the domestic hot-water, be heat source side heat exchanger 6 defrosts.During work, first throttle mechanism 4 closes, second throttle mechanism, 5 operate as normal; First flow direction control valve, 41 standard-sized sheets, second flow direction control valve 42 is closed; Low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, through the low pressure tie point C that often opens tie point A, the 67 pipeline 67, heat source side heat exchanger 6, second throttle mechanism the 5, the 58 pipeline the 58, the 52 pipeline 52, heater the 8, the 51 pipeline 51, first flow direction control valve the 41, the 61 pipeline 61, first cross valve, 2 commutation nodes 72, first cross valve, 2 low pressure nodes the 73, the 63 pipeline 63, compression set 1 of the 59 pipeline 59, compression set 1, get back to low pressure compressor 1-1 arrival end successively.

Present embodiment scheme shown in Figure 1, if high pressure compressor 1-2 is out of service or when being in unloaded state, its arrival end and the port of export are (for example: screw compressor) to be in the state of being interconnected, then can not establish the 3rd check valve 23 in the compression set 1, at this moment, compression set 1 is made up of low pressure compressor 1-1, high pressure compressor 1-2; Their connected mode is as follows: the arrival end of low pressure compressor 1-1 links to each other with the low pressure tie point C of compression set 1, the port of export of low pressure compressor 1-1 links to each other with the high pressure tie point B of compression set 1 by high pressure compressor 1-2 arrival end, the high pressure compressor 1-2 port of export, and the tie point A that often opens of compression set 1 passes through the 59 pipeline 59 and links to each other with pipeline between the low pressure compressor 1-1 port of export and the high pressure compressor 1-2 arrival end.The above scheme is applicable to all embodiment of the present invention.

Embodiment 2

As shown in Figure 2, with the difference of embodiment 1 be to have increased by one the 3rd throttle mechanism 7 in the system, its connected mode is: the 3rd throttle mechanism 7 one ends link to each other with heater 8, the 3rd throttle mechanism 7 other ends link to each other with the 52 pipeline 52.As shown in Figure 2, at this moment, first flow direction control valve 41 and second flow direction control valve 42 can be substituted by first check valve 21 and second check valve 22 respectively; Their connected mode is: first check valve, 21 arrival ends link to each other with the 61 pipeline 61, first check valve, 21 ports of export link to each other with heater 8 by the 51 pipeline 51, second check valve, 22 ports of export link to each other with the 51 pipeline 51 between first check valve, 21 ports of export and the heater 8, and second check valve, 22 arrival ends link to each other with the 62 pipeline 62.

Present embodiment scheme shown in Figure 2 also can realize the function of embodiment 1 scheme shown in Figure 1, and its workflow is identical with the workflow of embodiment 1 corresponding function.In the course of work, the 3rd throttle mechanism 7 is used to control and regulate the refrigerant flow by heater 8.Under each function, the duty of three throttle mechanisms is as follows.

1) separate refrigeration: first throttle mechanism 4 operate as normal, second throttle mechanism, 5 standard-sized sheets, the 3rd throttle mechanism 7 cuts out.

2) hot water (scheme one, two) is produced in the double full recuperation of heat of refrigeration: first throttle mechanism 4 operate as normal, second throttle mechanism 5 cuts out, the 3rd throttle mechanism 7 standard-sized sheets.

3) hot water is produced in the double partly recuperation of heat of refrigeration: first throttle mechanism 4, second throttle mechanism 5, the 3rd throttle mechanism 7 be operate as normal all.

4) need freeze simultaneously by the user and produce hot water: first throttle mechanism 4, second throttle mechanism 5 be operate as normal all, the 3rd throttle mechanism 7 standard-sized sheets.

5) produce hot water separately: first throttle mechanism 4 closes, second throttle mechanism, 5 operate as normal, and the 3rd throttle mechanism 7 standard-sized sheets,

6) heating separately: first throttle mechanism 4 standard-sized sheets, second throttle mechanism, 5 operate as normal, the 3rd throttle mechanism 7 cuts out.

7) heat simultaneously and produce hot water: first throttle mechanism 4, second throttle mechanism 5, the 3rd throttle mechanism 7 be operate as normal all.

8) winter frost removing (scheme is for utilizing user side heat exchanger 3 from indoor draw heat defrost): first throttle mechanism 4 operate as normal, second throttle mechanism, 5 standard-sized sheets, the 3rd throttle mechanism 7 cuts out.

The above scheme of present embodiment is applicable to all embodiment of the present invention.

Embodiment 3

As shown in Figure 3, the difference with embodiment 2 schemes shown in Figure 2 is: compression set 1 is made up of low pressure compressor 1-1, high pressure compressor 1-2, the 3rd check valve 23, second cross valve 80 and capillary 9.Their connected mode is as follows: the arrival end of low pressure compressor 1-1 links to each other with the low pressure tie point C of compression set 1, the port of export of low pressure compressor 1-1 links to each other with the high pressure tie point B of compression set 1 by high pressure compressor 1-2 arrival end, the high pressure compressor 1-2 port of export, the 3rd check valve 23 arrival ends link to each other with pipeline between the low pressure compressor 1-1 port of export and the high pressure compressor 1-2 arrival end, and the pipeline between the high pressure tie point B of the 3rd check valve 23 ports of export and the high pressure compressor 1-2 port of export and compression set 1 links to each other; The high pressure node 81 of second cross valve 80 links to each other with low pressure compressor 1-1 port of export pipeline by the 59 pipeline 59, the low pressure node 83 of second cross valve 80 links to each other by the pipeline between the low pressure tie point C of the 65 pipeline 65 and low pressure compressor 1-1 arrival end and compression set 1, any one node 84 in 80 2 commutations of second cross valve node links to each other with the tie point A that often opens of compression set 1 by the 68 pipeline 68, and another commutation node 82 of second cross valve 80 links to each other with the 65 pipeline 65 by the 66 pipeline 66, capillary 9 successively.The composition of above-mentioned compression set 1 and connectivity scenario are applicable to all embodiment of the present invention.

Present embodiment scheme shown in Figure 3 also can realize the function of embodiment 1 scheme shown in Figure 1, and the workflow under each function is as described below respectively.

(1) separate refrigeration

During work, first throttle mechanism 4 operate as normal, second throttle mechanism, 5 standard-sized sheets, the 3rd throttle mechanism 7 cuts out, and low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 59 pipeline 59, the high pressure node 81 of second cross valve 80, the commutation node 84 of second cross valve 80, the 68 pipeline 68, compression set 1 often open tie point A, the 67 pipeline 67, heat source side heat exchanger 6, second throttle mechanism 5, the 58 pipeline 58, the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1 gets back to low pressure compressor 1-1 arrival end.

When the present invention moved under this function, the high pressure node 81 of second cross valve 80 was communicated with the commutation node 82 of second cross valve 80.

Scheme one (single stage compress)

During work, first throttle mechanism 4 operate as normal, second throttle mechanism 5 cuts out, the 3rd throttle mechanism 7 standard-sized sheets, low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1 gets back to low pressure compressor 1-1 arrival end.

Scheme two (twin-stage compression)

During work, first throttle mechanism 4 operate as normal, second throttle mechanism 5 cuts out, the 3rd throttle mechanism 7 standard-sized sheets, low pressure compressor 1-1, high pressure compressor 1-2 normally move.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, hot device 8, the 3rd throttle mechanism 7, the 52 pipeline 52, the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export is got back to high pressure compressor 1-2 arrival end.

During work, first throttle mechanism 4, second throttle mechanism 5, the 3rd throttle mechanism 7 be operate as normal all, second throttle mechanism 5 and the 3rd throttle mechanism 7 are respectively applied for the refrigerant flow of regulating by heat source side heat exchanger 6 and heater 8, and first throttle mechanism 4 is used for the cold-producing medium throttling; Low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, be divided into two-way, one the tunnel successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, enter the 57 pipeline 57, another road is successively through the 59 pipeline 59, the high pressure node 81 of second cross valve 80, the commutation node 84 of second cross valve 80, the 68 pipeline 68, compression set 1 often open tie point A, the 67 pipeline 67, heat source side heat exchanger 6, second throttle mechanism 5, the 58 pipeline 58, also enter the 57 pipeline 57, two-way is after the 57 pipeline 57 mixes, pass through first throttle mechanism 4 more successively, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1 gets back to low pressure compressor 1-1 arrival end.

(4) need freeze simultaneously by the user and produce hot water

Scheme one (single stage compress)

During work, first throttle mechanism 4, second throttle mechanism 5 be operate as normal all, is respectively applied for the refrigerant flow of regulating by user side heat exchanger 3 and heat source side heat exchanger 6; The 3rd throttle mechanism 7 standard-sized sheets, low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, after coming out, the 52 pipeline 52 is divided into two-way, one the tunnel successively through the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 68 pipeline 68, the commutation node 84 of second cross valve 80, the low pressure node 83 of second cross valve 80, the 65 pipeline 65, enter low pressure compressor 1-1 arrival end pipeline, another road is successively through the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1, also enter low pressure compressor 1-1 arrival end pipeline, two-way enters low pressure compressor 1-1 and is compressed once more after low pressure compressor 1-1 arrival end pipeline mixes.

Scheme two (twin-stage compression)

During work, first throttle mechanism 4, second throttle mechanism 5 be operate as normal all, is respectively applied for the refrigerant flow of regulating by user side heat exchanger 3 and heat source side heat exchanger 6; The 3rd throttle mechanism 7 standard-sized sheets, low pressure compressor 1-1, high pressure compressor 1-2 normally move.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, after coming out, the 52 pipeline 52 is divided into two-way, one the tunnel successively through the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 68 pipeline 68, the commutation node 84 of second cross valve 80, the low pressure node 83 of second cross valve 80, the 65 pipeline 65, enter low pressure compressor 1-1 arrival end pipeline, another road is successively through the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1, also enter low pressure compressor 1-1 arrival end pipeline, two-way is after low pressure compressor 1-1 arrival end pipeline mixes, enter low pressure compressor 1-1 by once more the compression after, get back to high pressure compressor 1-2 arrival end.

(5) produce hot water separately

Scheme one (single stage compress)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 closes, the 3rd throttle mechanism 7 standard-sized sheets; Low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 68 pipeline 68, the commutation node 84 of second cross valve 80, the low pressure node 83 of second cross valve 80, the 65 pipeline 65, get back to low pressure compressor 1-1 arrival end.

Scheme two (twin-stage compression)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 closes, the 3rd throttle mechanism 7 standard-sized sheets; Low pressure compressor 1-1, high pressure compressor 1-2 normally move.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 68 pipeline 68, the commutation node 84 of second cross valve 80, the low pressure node 83 of second cross valve 80, the 65 pipeline 65, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export is got back to high pressure compressor 1-2 arrival end.

(6) heating separately

Scheme one (single stage compress)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 standard-sized sheets, the 3rd throttle mechanism 7 cuts out; Low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, the 64 pipeline 64, user side heat exchanger 3, first throttle mechanism 4, the 57 pipeline 57, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 68 pipeline 68, the commutation node 84 of second cross valve 80, the low pressure node 83 of second cross valve 80, the 65 pipeline 65, get back to low pressure compressor 1-1 arrival end.

Scheme two (twin-stage compression)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 standard-sized sheets, the 3rd throttle mechanism 7 cuts out; Low pressure compressor 1-1, high pressure compressor 1-2 normally move.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, the 64 pipeline 64, user side heat exchanger 3, first throttle mechanism 4, the 57 pipeline 57, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 68 pipeline 68, the commutation node 84 of second cross valve 80, the low pressure node 83 of second cross valve 80, the 65 pipeline 65, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export is got back to high pressure compressor 1-2 arrival end.

(7) heat simultaneously and produce hot water

Scheme one (single stage compress)

During work, first throttle mechanism 4, second throttle mechanism 5, the 3rd throttle mechanism 7 be operate as normal all; Low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, enter the 64 pipeline 64 and be divided into two-way, one the tunnel passes through user side heat exchanger 3 successively, first throttle mechanism 4, the 57 pipeline 57, enter the 58 pipeline 58, another road is successively through the 62 pipeline 62, second check valve, 22 arrival ends, second check valve, 22 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, also enter the 58 pipeline 58, two-way is after the 58 pipeline 58 mixes, more successively through second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 68 pipeline 68, the commutation node 84 of second cross valve 80, the low pressure node 83 of second cross valve 80, the 65 pipeline 65, get back to low pressure compressor 1-1 arrival end.

Scheme two (twin-stage compression)

During work, first throttle mechanism 4, second throttle mechanism 5, the 3rd throttle mechanism 7 be operate as normal all; Low pressure compressor 1-1, high pressure compressor 1-2 be normally operations also.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, enter the 64 pipeline 64 and be divided into two-way, one the tunnel passes through user side heat exchanger 3 successively, first throttle mechanism 4, the 57 pipeline 57, enter the 58 pipeline 58, another road is successively through the 62 pipeline 62, second check valve, 22 arrival ends, second check valve, 22 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, also enter the 58 pipeline 58, two-way is after the 58 pipeline 58 mixes, again successively through second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 68 pipeline 68, the commutation node 84 of second cross valve 80, the low pressure node 83 of second cross valve 80, the 65 pipeline 65, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export is got back to high pressure compressor 1-2 arrival end.

(8) winter frost removing

When adopting contrary circulation hot gas defrosting, when utilizing user side heat exchanger 3 from indoor draw heat defrost, its workflow is identical with the separate refrigeration function.

The such scheme that present embodiment is shown in Figure 3 is if high pressure compressor 1-2 is out of service or when being in unloaded state, its arrival end and the port of export are (for example: screw compressor), then can not establish the 3rd check valve 23 in the compression set 1 to be in the state of being interconnected.At this moment, compression set 1 is made up of low pressure compressor 1-1, high pressure compressor 1-2, second cross valve 80 and capillary 9; Their connected mode is as follows: the arrival end of low pressure compressor 1-1 links to each other with the low pressure tie point C of compression set 1, and the port of export of low pressure compressor 1-1 links to each other with the high pressure tie point B of compression set 1 by high pressure compressor 1-2 arrival end, the high pressure compressor 1-2 port of export; The high pressure node 81 of second cross valve 80 links to each other with low pressure compressor 1-1 port of export pipeline by the 59 pipeline 59, the low pressure node 83 of second cross valve 80 links to each other by the pipeline between the low pressure tie point C of the 65 pipeline 65 and low pressure compressor 1-1 arrival end and compression set 1, any one node 84 in 80 2 commutations of second cross valve node links to each other with the tie point A that often opens of compression set 1 by the 68 pipeline 68, and another commutation node 82 of second cross valve 80 links to each other with the 65 pipeline 65 by the 66 pipeline 66, capillary 9 successively.The composition of above-mentioned compression set 1 and connectivity scenario are applicable to all embodiment of the present invention.

Embodiment 4

As shown in Figure 4, the difference with embodiment 2 schemes shown in Figure 2 is: compression set 1 is made up of low pressure compressor 1-1, high pressure compressor 1-2, the 3rd check valve 23, the 4th flow direction control valve 44 and the 5th flow direction control valve 45.Their connected mode is as follows: the arrival end of low pressure compressor 1-1 links to each other with the low pressure tie point C of compression set 1, the port of export of low pressure compressor 1-1 links to each other with the high pressure tie point B of compression set 1 by high pressure compressor 1-2 arrival end, the high pressure compressor 1-2 port of export, the 3rd check valve 23 arrival ends link to each other with pipeline between the low pressure compressor 1-1 port of export and the high pressure compressor 1-2 arrival end, and the pipeline between the high pressure tie point B of the 3rd check valve 23 ports of export and the high pressure compressor 1-2 port of export and compression set 1 links to each other; The 4th flow direction control valve 44 1 ends link to each other with the tie point A that often opens of compression set 1 by the 59 pipeline 59, the 4th flow direction control valve 44 other ends link to each other by the pipeline between the low pressure tie point C of the 65 pipeline 65 and low pressure compressor 1-1 arrival end and compression set 1, the 5th flow direction control valve 45 1 ends link to each other with the 59 pipeline of often opening between tie point A and the 4th flow direction control valve 44 59 of compression set 1, and the 5th flow direction control valve 45 other ends link to each other with low pressure compressor 1-1 port of export pipeline.The composition of above-mentioned compression set 1 and connectivity scenario are applicable to all embodiment of the present invention.

Present embodiment scheme shown in Figure 4 also can realize the function of embodiment 1 scheme shown in Figure 1, and the workflow under each function is as described below respectively.

(1) separate refrigeration

During work, first throttle mechanism 4 operate as normal, second throttle mechanism, 5 standard-sized sheets, the 3rd throttle mechanism 7 cuts out, and low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work; The 4th flow direction control valve 44 is closed, the 5th flow direction control valve 45 standard-sized sheets.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, through the low pressure tie point C that often opens tie point A, the 67 pipeline 67, heat source side heat exchanger 6, second throttle mechanism the 5, the 58 pipeline the 58, the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger the 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes the 73, the 63 pipeline 63, compression set 1 of the 5th flow direction control valve the 45, the 59 pipeline 59, compression set 1, get back to low pressure compressor 1-1 arrival end successively.

Scheme one (single stage compress)

During work, first throttle mechanism 4 operate as normal, second throttle mechanism 5 cuts out, the 3rd throttle mechanism 7 standard-sized sheets, low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Scheme two (twin-stage compression)

During work, first throttle mechanism 4 operate as normal, second throttle mechanism 5 cuts out, the 3rd throttle mechanism 7 standard-sized sheets, low pressure compressor 1-1, high pressure compressor 1-2 normally move; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export is got back to high pressure compressor 1-2 arrival end.

During work, first throttle mechanism 4, second throttle mechanism 5, the 3rd throttle mechanism 7 be operate as normal all, second throttle mechanism 5 and the 3rd throttle mechanism 7 are respectively applied for the refrigerant flow of regulating by heat source side heat exchanger 6 and heater 8, and first throttle mechanism 4 is used for the cold-producing medium throttling; Low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work; The 4th flow direction control valve 44 is closed, the 5th flow direction control valve 45 standard-sized sheets.。

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, be divided into two-way, one the tunnel successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, enter the 57 pipeline 57, another road is successively through the 5th flow direction control valve 45, the 59 pipeline 59, compression set 1 often open tie point A, the 67 pipeline 67, heat source side heat exchanger 6, second throttle mechanism 5, the 58 pipeline 58, also enter the 57 pipeline 57, two-way is after the 57 pipeline 57 mixes, pass through first throttle mechanism 4 more successively, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1 gets back to low pressure compressor 1-1 arrival end.

(4) need freeze simultaneously by the user and produce hot water

Scheme one (single stage compress)

During work, first throttle mechanism 4, second throttle mechanism 5 be operate as normal all, is respectively applied for the refrigerant flow of regulating by user side heat exchanger 3 and heat source side heat exchanger 6; The 3rd throttle mechanism 7 standard-sized sheets, low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, after coming out, the 52 pipeline 52 is divided into two-way, one the tunnel successively through the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 4th flow direction control valve 44, the 65 pipeline 65, enter low pressure compressor 1-1 arrival end pipeline, another road is successively through the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1, also enter low pressure compressor 1-1 arrival end pipeline, two-way enters low pressure compressor 1-1 and is compressed once more after low pressure compressor 1-1 arrival end pipeline mixes.

Scheme two (twin-stage compression)

During work, first throttle mechanism 4, second throttle mechanism 5 be operate as normal all, is respectively applied for the refrigerant flow of regulating by user side heat exchanger 3 and heat source side heat exchanger 6; The 3rd throttle mechanism 7 standard-sized sheets, low pressure compressor 1-1, high pressure compressor 1-2 normally move; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, after coming out, the 52 pipeline 52 is divided into two-way, one the tunnel successively through the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 4th flow direction control valve 44, the 65 pipeline 65, enter low pressure compressor 1-1 arrival end pipeline, another road is successively through the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1, also enter low pressure compressor 1-1 arrival end pipeline, two-way is after low pressure compressor 1-1 arrival end pipeline mixes, enter low pressure compressor 1-1 by once more the compression after, get back to high pressure compressor 1-2 arrival end.

Scheme three (twin-stage compression)

Under this function, the cold-producing medium of medium temperature and medium pressure utilizes heat source side heat exchanger 6 draw heat from environment, the cold-producing medium of low-temp low-pressure utilizes user side heat exchanger 3 to be user's cooling, and condensation heat that refrigeration is produced and the heat of drawing from environment all are used to produce hot water in heater 8.During work, first throttle mechanism 4, second throttle mechanism 5 be operate as normal all, is respectively applied for the refrigerant flow of regulating by user side heat exchanger 3 and heat source side heat exchanger 6; The 3rd throttle mechanism 7 standard-sized sheets, low pressure compressor 1-1, high pressure compressor 1-2 normally move; The 4th flow direction control valve 44 is closed, the 5th flow direction control valve 45 standard-sized sheets.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, after coming out, the 52 pipeline 52 is divided into two-way, one the tunnel successively through the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 5th flow direction control valve 45, enter low pressure compressor 1-1 port of export pipeline, another road is successively through the 57 pipeline 57, first throttle mechanism 4, user side heat exchanger 3, the 64 pipeline 64, first cross valve, 2 commutation nodes 74, first cross valve, 2 low pressure nodes 73, the 63 pipeline 63, the low pressure tie point C of compression set 1, low pressure compressor 1-1 arrival end, also enter low pressure compressor 1-1 port of export pipeline, two-way is got back to high pressure compressor 1-2 arrival end after low pressure compressor 1-1 port of export pipeline mixes.

(5) produce hot water separately

Scheme one (single stage compress)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 closes, the 3rd throttle mechanism 7 standard-sized sheets; Low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 4th flow direction control valve 44, the 65 pipeline 65 is got back to low pressure compressor 1-1 arrival end.

Scheme two (twin-stage compression)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 closes, the 3rd throttle mechanism 7 standard-sized sheets; Low pressure compressor 1-1, high pressure compressor 1-2 normally move; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 4th flow direction control valve 44, the 65 pipeline 65, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export is got back to high pressure compressor 1-2 arrival end.

Scheme three (single stage compress)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 closes, the 3rd throttle mechanism 7 standard-sized sheets; Low pressure compressor 1-1 does not work, and high pressure compressor 1-2 normally moves; The 4th flow direction control valve 44 is closed, the 5th flow direction control valve 45 standard-sized sheets.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 72, the 61 pipeline 61, first check valve, 21 arrival ends, first check valve, 21 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 5th flow direction control valve 45 is got back to high pressure compressor 1-2 arrival end.

(6) heating separately

Scheme one (single stage compress)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 standard-sized sheets, the 3rd throttle mechanism 7 cuts out; Low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, the 64 pipeline 64, user side heat exchanger 3, first throttle mechanism 4, the 57 pipeline 57, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 4th flow direction control valve 44, the 65 pipeline 65 is got back to low pressure compressor 1-1 arrival end.

Scheme two (twin-stage compression)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 standard-sized sheets, the 3rd throttle mechanism 7 cuts out; Low pressure compressor 1-1, high pressure compressor 1-2 normally move; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, the 64 pipeline 64, user side heat exchanger 3, first throttle mechanism 4, the 57 pipeline 57, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 4th flow direction control valve 44, the 65 pipeline 65, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export is got back to high pressure compressor 1-2 arrival end.

Scheme three (single stage compress)

During work, second throttle mechanism, 5 operate as normal, first throttle mechanism 4 standard-sized sheets, the 3rd throttle mechanism 7 cuts out; Low pressure compressor 1-1 does not work, and high pressure compressor 1-2 normally moves; The 4th flow direction control valve 44 is closed, the 5th flow direction control valve 45 standard-sized sheets.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, successively through the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes the 74, the 64 pipeline 64, user side heat exchanger 3, first throttle mechanism the 4, the 57 pipeline the 57, the 58 pipeline 58, second throttle mechanism 5, heat source side heat exchanger the 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 5th flow direction control valve 45, get back to high pressure compressor 1-2 arrival end.

(7) heat simultaneously and produce hot water

Scheme one (single stage compress)

During work, first throttle mechanism 4, second throttle mechanism 5, the 3rd throttle mechanism 7 be operate as normal all; Low pressure compressor 1-1 normally moves, and high pressure compressor 1-2 does not work; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Its workflow is: after cold-producing medium is discharged from the low pressure compressor 1-1 port of export, successively through the 3rd check valve 23 arrival ends, the 3rd check valve 23 ports of export, the high pressure tie point B of compression set 1, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, enter the 64 pipeline 64 and be divided into two-way, one the tunnel passes through user side heat exchanger 3 successively, first throttle mechanism 4, the 57 pipeline 57, enter the 58 pipeline 58, another road is successively through the 62 pipeline 62, second check valve, 22 arrival ends, second check valve, 22 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, also enter the 58 pipeline 58, two-way is after the 58 pipeline 58 mixes, again successively through second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 4th flow direction control valve 44, the 65 pipeline 65 is got back to low pressure compressor 1-1 arrival end.

Scheme two (twin-stage compression)

During work, first throttle mechanism 4, second throttle mechanism 5, the 3rd throttle mechanism 7 be operate as normal all; Low pressure compressor 1-1, high pressure compressor 1-2 be normally operations also; The 4th flow direction control valve 44 standard-sized sheets, the 5th flow direction control valve 45 is closed.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, enter the 64 pipeline 64 and be divided into two-way, one the tunnel passes through user side heat exchanger 3 successively, first throttle mechanism 4, the 57 pipeline 57, enter the 58 pipeline 58, another road is successively through the 62 pipeline 62, second check valve, 22 arrival ends, second check valve, 22 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, also enter the 58 pipeline 58, two-way is after the 58 pipeline 58 mixes, again successively through second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 4th flow direction control valve 44, the 65 pipeline 65, low pressure compressor 1-1 arrival end, the low pressure compressor 1-1 port of export is got back to high pressure compressor 1-2 arrival end.

Scheme three (single stage compress)

During work, first throttle mechanism 4, second throttle mechanism 5, the 3rd throttle mechanism 7 be operate as normal all; Low pressure compressor 1-1 does not work, and high pressure compressor 1-2 normally moves; The 4th flow direction control valve 44 is closed, the 5th flow direction control valve 45 standard-sized sheets.

Its workflow is: after cold-producing medium is discharged from the high pressure compressor 1-2 port of export, pass through the high pressure tie point B of compression set 1 successively, the 60 pipeline 60, first cross valve, 2 high pressure nodes 71, first cross valve, 2 commutation nodes 74, enter the 64 pipeline 64 and be divided into two-way, one the tunnel passes through user side heat exchanger 3 successively, first throttle mechanism 4, the 57 pipeline 57, enter the 58 pipeline 58, another road is successively through the 62 pipeline 62, second check valve, 22 arrival ends, second check valve, 22 ports of export, the 51 pipeline 51, heater 8, the 3rd throttle mechanism 7, the 52 pipeline 52, also enter the 58 pipeline 58, two-way is after the 58 pipeline 58 mixes, again successively through second throttle mechanism 5, heat source side heat exchanger 6, the 67 pipeline 67, compression set 1 often open tie point A, the 59 pipeline 59, the 5th flow direction control valve 45 is got back to high pressure compressor 1-2 arrival end.

(8) winter frost removing

The such scheme that present embodiment is shown in Figure 4 is if high pressure compressor 1-2 is out of service or when being in unloaded state, its arrival end and the port of export are (for example: screw compressor), then can not establish the 3rd check valve 23 in the compression set 1 to be in the state of being interconnected.At this moment, compression set 1 is made up of low pressure compressor 1-1, high pressure compressor 1-2, the 4th flow direction control valve 44 and the 5th flow direction control valve 45; Their connected mode is as follows: the arrival end of low pressure compressor 1-1 links to each other with the low pressure tie point C of compression set 1, and the port of export of low pressure compressor 1-1 links to each other with the high pressure tie point B of compression set 1 by high pressure compressor 1-2 arrival end, the high pressure compressor 1-2 port of export; The 4th flow direction control valve 44 1 ends link to each other with the tie point A that often opens of compression set 1 by the 59 pipeline 59, the 4th flow direction control valve 44 other ends link to each other by the pipeline between the low pressure tie point C of the 65 pipeline 65 and low pressure compressor 1-1 arrival end and compression set 1, the 5th flow direction control valve 45 1 ends link to each other with the 59 pipeline of often opening between tie point A and the 4th flow direction control valve 44 59 of compression set 1, and the 5th flow direction control valve 45 other ends link to each other with low pressure compressor 1-1 port of export pipeline.The composition of above-mentioned compression set 1 and connectivity scenario are applicable to all embodiment of the present invention.

Embodiment 5

As shown in Figure 5, with the difference of embodiment 2 be to have increased a liquid reservoir 50 in the system, its connected mode is: first throttle mechanism 4 one ends link to each other with user side heat exchanger 3, first throttle mechanism 4 other ends link to each other with liquid reservoir 50 by the 57 pipeline 57, second throttle mechanism, 5 one ends link to each other with heat source side heat exchanger 6, second throttle mechanism, 5 other ends link to each other with liquid reservoir 50 by the 58 pipeline 58, the 3rd throttle mechanism 7 one ends link to each other with heater 8, and the 3rd throttle mechanism 7 other ends are by the 52 pipeline 52 and liquid reservoir 50, any place of the 57 pipeline 57 or the 58 pipeline 58 links to each other.Shown in Figure 5, the described scheme of present embodiment, the 3rd throttle mechanism 7 is to link to each other with liquid reservoir 50 by the 52 pipeline 52.

The above scheme is applicable to all embodiment of the present invention; But, for embodiment 1, owing to do not have the 3rd throttle mechanism 7 in the system, so the connected mode of liquid reservoir 50 in system is slightly different, its connected mode is: first throttle mechanism 4 one ends link to each other with user side heat exchanger 3, first throttle mechanism 4 other ends link to each other with liquid reservoir 50 by the 57 pipeline 57, second throttle mechanism, 5 one ends link to each other with heat source side heat exchanger 6, second throttle mechanism, 5 other ends link to each other with liquid reservoir 50 by the 58 pipeline 58, heater 8 one ends link to each other with the 51 pipeline 51, and heater 8 other ends are by the 52 pipeline 52 and liquid reservoir 50, any place of the 57 pipeline 57 or the 58 pipeline 58 links to each other.

Embodiment 6

As shown in Figure 6, with the difference of embodiment 5 be to have increased by one the 3rd flow direction control valve 43 in the system, its connected mode is: the 3rd flow direction control valve 43 1 ends link to each other with liquid reservoir 50, and the 3rd flow direction control valve 43 other ends link to each other with the intermediate pressure tie point D of compression set 1.

As shown in Figure 6, in the present embodiment, the intermediate pressure tie point D of compression set 1 links to each other with pipeline between the low pressure compressor 1-1 port of export and the high pressure compressor 1-2 arrival end by the 69 pipeline 69.

In the twin-stage compression work process, when the 3rd flow direction control valve 43 was opened, such scheme can be realized the middle tonifying Qi of compression process, so can improve the service behaviour under the service behaviour of equipment, particularly low temperature environment.The 3rd flow direction control valve 43 can adopt electric expansion valve or other throttling arrangement.

In the scheme of above-mentioned all embodiment, one or more even all flow direction control valves of described flow direction control valve can both adopt magnetic valve, have the throttle mechanism of turn-off function or in the flow control device any one substitutes; Above-described compressor can use screw compressor, or helical-lobe compressor, or the compressor of other kind.

In the scheme of above-mentioned all embodiment, user side heat exchanger 3 also can be the heat exchanger of cold-producing medium-water-to-water heat exchanger or other kind except being cold-producing medium-air heat exchanger; During as cold-producing medium-water-to-water heat exchanger, user side heat exchanger 3 adopts plate type heat exchanger or double pipe heat exchangers usually.Heat source side heat exchanger 6 is except can being cold-producing medium-air heat exchanger, also can be cold-producing medium-soil heat exchange device, cold-producing medium-water-to-water heat exchanger, also can be evaporating heat exchanger, can also be solar thermal collector, in addition, also can be the heat exchanger of other kind.Heater 8 be except can being cold-producing medium-water-to-water heat exchanger, and heater 8 also can be cold-producing medium-air heat exchanger, solution heater or solution regenerator or according to the heat exchanger of other kind of using needs; During as cold-producing medium-water-to-water heat exchanger, heater 8 adopts any one in volumetric heat exchanger, plate type heat exchanger or the double pipe heat exchangers usually, or the heat exchanger of other kind as required.

Claims

1. operation of air conditioning systems, comprise compression set (1), first cross valve (2), user side heat exchanger (3), heat source side heat exchanger (6) and first throttle mechanism (4), it is characterized in that: this operation of air conditioning systems also comprises second throttle mechanism (5), heater (8), first flow direction control valve (41) and second flow direction control valve (42); Described compression set (1) has high pressure tie point (B), low pressure tie point (C), often opens three connected nodes of tie point (A); The high pressure tie point (B) of described compression set (1) links to each other with the high pressure node (71) of first cross valve (2) by the 60 pipeline (60), the low pressure tie point (C) of described compression set (1) links to each other with the low pressure node (73) of first cross valve (2) by the 63 pipeline (63), the tie point (A) of often opening of described compression set (1) passes through the 67 pipeline (67) successively, heat source side heat exchanger (6), second throttle mechanism (5), the 58 pipeline (58), the 57 pipeline (57), first throttle mechanism (4), user side heat exchanger (3), any one node (74) in (2) two commutations of the 64 pipeline (64) and first cross valve node links to each other, another node (72) of described first cross valve (2) is successively by the 61 pipeline (61), first flow direction control valve (41), second flow direction control valve (42), the 62 pipeline (62) links to each other with the 64 pipeline (64) that user side heat exchanger (3) and first cross valve (2) commutate between the node (74), described heater (8) one ends link to each other with pipeline between first flow direction control valve (41) and second flow direction control valve (42) by the 51 pipeline (51), and described heater (8) other end passes through the 52 pipeline (52) while and links to each other with the 58 pipeline (58) with the 57 pipeline (57).

2. operation of air conditioning systems, comprise compression set (1), first cross valve (2), user side heat exchanger (3), heat source side heat exchanger (6) and first throttle mechanism (4), it is characterized in that: this operation of air conditioning systems also comprises second throttle mechanism (5), the 3rd throttle mechanism (7), heater (8), first flow direction control valve (41) and second flow direction control valve (42); Described compression set (1) has high pressure tie point (B), low pressure tie point (C), often opens three connected nodes of tie point (A); The high pressure tie point (B) of described compression set (1) links to each other with the high pressure node (71) of first cross valve (2) by the 60 pipeline (60), the low pressure tie point (C) of described compression set (1) links to each other with the low pressure node (73) of first cross valve (2) by the 63 pipeline (63), the tie point (A) of often opening of described compression set (1) passes through the 67 pipeline (67) successively, heat source side heat exchanger (6), second throttle mechanism (5), the 58 pipeline (58), the 57 pipeline (57), first throttle mechanism (4), user side heat exchanger (3), any one node (74) in (2) two commutations of the 64 pipeline (64) and first cross valve node links to each other, another node (72) of described first cross valve (2) is successively by the 61 pipeline (61), first flow direction control valve (41), second flow direction control valve (42), the 62 pipeline (62) links to each other with the 64 pipeline (64) that user side heat exchanger (3) and first cross valve (2) commutate between the node (74), described heater (8) one ends link to each other with pipeline between first flow direction control valve (41) and second flow direction control valve (42) by the 51 pipeline (51), and described heater (8) other end passes through the 3rd throttle mechanism (7), the 52 pipeline (52) links to each other with the 58 pipeline (58) with the 57 pipeline (57) simultaneously.

3. according to the described operation of air conditioning systems of arbitrary claim in claim 1 and 2, it is characterized in that described compression set (1) is by low pressure compressor (1-1), high pressure compressor (1-2) is formed, the arrival end of described low pressure compressor (1-1) links to each other with the low pressure tie point (C) of described compression set (1), the port of export of described low pressure compressor (1-1) is by high pressure compressor (1-2) arrival end, high pressure compressor (1-2) port of export links to each other with the high pressure tie point (B) of described compression set (1), and the tie point (A) of often opening of described compression set (1) links to each other with pipeline between low pressure compressor (1-1) port of export and high pressure compressor (1-2) arrival end by the 59 pipeline (59).

4. operation of air conditioning systems according to claim 3, it is characterized in that having additional in the system one the 3rd check valve (23), pipeline between the high pressure tie point (B) of described the 3rd check valve (23) port of export and described high pressure compressor (1-2) port of export and compression set (1) links to each other, and described the 3rd check valve (23) arrival end links to each other with low pressure compressor (1-1) port of export pipeline.

5. operation of air conditioning systems according to claim 3, it is characterized in that one the 4th flow direction control valve (44) one ends link to each other with the tie point (A) of often opening of described compression set (1) by the 59 pipeline (59), described the 4th flow direction control valve (44) other end links to each other by the pipeline between the low pressure tie point (C) of the 65 pipeline (65) and low pressure compressor (1-1) arrival end and compression set (1), one the 5th flow direction control valve (45) one ends link to each other with the 59 pipeline of often opening between tie point (A) and the 4th flow direction control valve (44) (59) of compression set (1), and described the 5th flow direction control valve (45) other end links to each other with low pressure compressor (1-1) port of export pipeline.

6. operation of air conditioning systems according to claim 3, it is characterized in that having additional in the system one second cross valve (80) and capillary (9), the high pressure node (81) of described second cross valve (80) links to each other with low pressure compressor (1-1) port of export pipeline by the 59 pipeline (59), the low pressure node (83) of described second cross valve (80) links to each other by the pipeline between the low pressure tie point (C) of the 65 pipeline (65) and low pressure compressor (1-1) arrival end and described compression set (1), any one node (84) in (80) two commutations of described second cross valve node links to each other with the tie point (A) of often opening of described compression set (1) by the 68 pipeline (68), and another commutation node (82) of described second cross valve (80) is successively by the 66 pipeline (66), capillary (9) links to each other with the 65 pipeline (65).

7. according to the described operation of air conditioning systems of arbitrary claim in claim 5 and 6, it is characterized in that having additional in the system one the 3rd check valve (23), pipeline between the high pressure tie point (B) of described the 3rd check valve (23) port of export and described high pressure compressor (1-2) port of export and compression set (1) links to each other, and described the 3rd check valve (23) arrival end links to each other with low pressure compressor (1-1) port of export pipeline.

8. operation of air conditioning systems according to claim 2, it is characterized in that described first flow direction control valve (41), second flow direction control valve (42) is substituted by first check valve (21) and second check valve (22) respectively, described first check valve (21) arrival end links to each other with the 61 pipeline (61), first check valve (21) port of export links to each other with heater (8) by the 51 pipeline (51), described second check valve (22) port of export links to each other with the 51 pipeline (51) between first check valve (21) port of export and the heater (8), and second check valve (22) arrival end links to each other with the 62 pipeline (62).

9. operation of air conditioning systems according to claim 1, it is characterized in that having additional in the system liquid reservoir (50), described first throttle mechanism (4) one ends link to each other with user side heat exchanger (3), first throttle mechanism (4) other end links to each other with liquid reservoir (50) by the 57 pipeline (57), described second throttle mechanism (5) one ends link to each other with heat source side heat exchanger (6), second throttle mechanism (5) other end links to each other with liquid reservoir (50) by the 58 pipeline (58), described heater (8) one ends link to each other with the 51 pipeline (51), and heater (8) other end is by the 52 pipeline (52) and liquid reservoir (50), any place of the 57 pipeline (57) or the 58 pipeline (58) links to each other.

10. operation of air conditioning systems according to claim 2, it is characterized in that having additional in the system liquid reservoir (50), described first throttle mechanism (4) one ends link to each other with user side heat exchanger (3), first throttle mechanism (4) other end links to each other with liquid reservoir (50) by the 57 pipeline (57), described second throttle mechanism (5) one ends link to each other with heat source side heat exchanger (6), second throttle mechanism (5) other end links to each other with liquid reservoir (50) by the 58 pipeline (58), described the 3rd throttle mechanism (7) one ends link to each other with heater (8), and the 3rd throttle mechanism (7) other end is by the 52 pipeline (52) and liquid reservoir (50), any place of the 57 pipeline (57) or the 58 pipeline (58) links to each other.