CN104534722B

CN104534722B - Operation of air conditioning systems

Info

Publication number: CN104534722B
Application number: CN201410779491.4A
Authority: CN
Inventors: 刘雄; 杨艳芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-12-08
Filing date: 2014-12-08
Publication date: 2017-10-20
Anticipated expiration: 2034-12-08
Also published as: CN104534722A

Abstract

The invention discloses a kind of operation of air conditioning systems, including the first compression mechanism, the second compression mechanism, the first four-way valve, the second four-way valve, First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, first throttle mechanism, the 3rd throttle mechanism, the first flow direction control valve；The low pressure node of first four-way valve is connected by the 65th pipeline with the low pressure node of second four-way valve, the high voltage nodes of first four-way valve pass sequentially through the 60th pipeline, the second compression mechanism port of export, the second compression mechanism arrival end, the 68th pipeline and are connected with the 65th pipeline between the low pressure node of the first four-way valve and the low pressure node of the second four-way valve, and the high voltage nodes of second four-way valve are connected by the 62nd pipeline with the first compression mechanism port of export.Simple in construction, reliable operation is with low cost, and winter can realize defrost of being absorbed heat from environment in the process of running, is avoided that delay of the refrigerant in four-way valve and heat exchanger.

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.

Background technology

Present invention applicant is disclosed on 06 20th, 2012, the patent of invention of Application No. 201110355046.1 is carried A kind of operation of air conditioning systems scheme is gone out, its system composition is respectively such as Fig. 8.

From the patent of invention specification (i.e.：The specification of patent of invention 201110355046.1) " 0025~0027 " section Description in it is further known that：Scheme shown in Fig. 8 is when realizing separate refrigeration function, and the 3rd heat exchanger 8 does not work, the first heat exchange Device 3 is evaporator, for for user's cooling, the second heat exchanger 6 to be condenser, for being that user is freezed institute by First Heat Exchanger 3 Whole condensation heats of generation are discharged into environment (outdoor air or cooling water or soil etc.).During work, first throttle mechanism 4 is complete Open, the normal work of second throttle body 5, the 3rd throttle mechanism 7 is closed.

Workflow of the scheme shown in Fig. 8 under this function be：Refrigerant is after the discharge of the port of export of compression mechanism 1, successively By the 60th pipeline 60, the high voltage nodes 71 of the first four-way valve 70, the normally opened node 74 of the first four-way valve 70, the 64th pipeline 64th, the second heat exchanger 6, first throttle mechanism 4, the 57th pipeline 57, the 58th pipeline 58, second throttle body 5, first Heat exchanger 3, the 67th pipeline 67, the normally opened node 84 of the second four-way valve 80, the low pressure node the 83, the 65th of the second four-way valve 80 Pipeline 65, the 63rd pipeline 63, return to the arrival end of compression mechanism 1, are compressed into compression mechanism 1, complete one cycle.

Workflow of the scheme under separate refrigeration function shown in figure 8 above, the scheme shown in Fig. 8 is individually being made When being worked under cold function, the connected mode of first 70 4 connecting nodes of four-way valve is：The high voltage nodes 71 of first four-way valve 70 with The normally opened node 74 of first four-way valve 70 is connected, the common points 72 of the first four-way valve 70 and the phase of 70 low pressure node of the first four-way valve 73 Connection.

The connected mode of second 80 4 connecting nodes of four-way valve is：The normally opened four-way of node 84 and second of second four-way valve 80 The low pressure node 83 of valve 80 is connected, and the high voltage nodes 81 of the second four-way valve 80 are connected with the common points 82 of the second four-way valve 80.

Because during work, the high voltage nodes 81 of the second four-way valve 80 are connected with the common points 82 of the second four-way valve 80, and the Three throttle mechanisms 7 are closed again, therefore as shown in figure 8, the course of work of the scheme shown in Fig. 8 under separate refrigeration function In, sequentially pass through the common points 82 of the second four-way valve 80, the 66th pipeline 66, second from the high voltage nodes 81 of the second four-way valve 80 In check valve 22, the 51st pipeline 51, this article of refrigerant circulation passage of the throttle mechanism 7 of the 3rd heat exchanger 8 to the 3rd, system Cryogen does not flow, therefore the scheme shown in Fig. 8 under separate refrigeration function when working, the HTHP system that compression mechanism 1 is discharged Refrigerant gas can be stagnated in the high-pressure side inside the second four-way valve 80.

From the patent of invention specification of scheme shown in Fig. 8 (i.e.：The specification of patent of invention 201110355046.1) the " In the description of 0040~0042 " section also it is further known that：

Scheme shown in Fig. 8 is when realizing independent heating function, and the 3rd heat exchanger 8 does not work, and the second heat exchanger 6 is evaporation Device, for the draw heat from environment (outdoor air or cooling water or soil etc.), First Heat Exchanger 3 is condenser, is used for Heated for user；During work, the normal work of first throttle mechanism 4, the standard-sized sheet of second throttle body 5, the 3rd throttle mechanism 7 is closed.

Workflow of the scheme under this function shown in Fig. 8 is as follows：Refrigerant from the port of export of compression mechanism 1 discharge after, Sequentially pass through the 60th pipeline 60, the 59th pipeline 59, the high voltage nodes 81 of the second four-way valve 80, the normally opened section of the second four-way valve 80 Point the 84, the 67th pipeline 67, First Heat Exchanger 3, second throttle body 5, the 58th pipeline 58, the 57th pipeline 57, First throttle mechanism 4, the second heat exchanger 6, the 64th pipeline 64, the normally opened node 74 of the first four-way valve 70, the first four-way valve 70 Low pressure node 73, the 65th pipeline 65, the 63rd pipeline 63, return to the arrival end of compression mechanism 1, into the quilt of compression mechanism 1 Compression, completes one cycle.

From workflow of the scheme shown in figure 8 above under independent heating function, scheme shown in Fig. 8 is in this function During lower work, the connected mode of first 70 4 connecting nodes of four-way valve is：The normally opened node 74 and the 1st of first four-way valve 70 The low pressure node 73 of port valve 70 is connected, and the high voltage nodes 71 of the first four-way valve 70 are connected with the common points 72 of the first four-way valve 70.

The connected mode of second 80 4 connecting nodes of four-way valve is：The high voltage nodes 81 of second four-way valve 80 and the second four-way The normally opened node 84 of valve 80 is connected, and the common points 82 of the second four-way valve 80 are connected with the low pressure node 83 of the second four-way valve 80.

Because during work, the high voltage nodes 71 of the first four-way valve 70 are connected with the common points 72 of the first four-way valve 70, and the Three throttle mechanisms 7 are closed again, therefore as shown in figure 8, the course of work of the scheme under independent heating function shown in Fig. 8 In, sequentially pass through the common points 72 of the first four-way valve 70, the 61st pipeline 61, first from the high voltage nodes 71 of the first four-way valve 70 In check valve 21, the 51st pipeline 51, this article of refrigerant circulation passage of the throttle mechanism 7 of the 3rd heat exchanger 8 to the 3rd, system Cryogen does not flow, therefore the scheme shown in Fig. 8 under independent heating function when working, the HTHP system that compression mechanism 1 is discharged Refrigerant gas can also be stagnated in the high-pressure side inside the first four-way valve 70.

In summary the analysis to scheme shown in Fig. 8 is understood：Scheme shown in Fig. 8 in the course of the work, when the 3rd heat exchange Device 8 does not work, and First Heat Exchanger 3 is evaporator, and the second heat exchanger 6 (works when being condenser under separate refrigeration function When), the phenomenon that refrigerant is stagnated occurs in the high-pressure side inside the second four-way valve 80.

Similar, in the course of work, when the 3rd heat exchanger 8 does not work, First Heat Exchanger 3 is condenser, the second heat exchanger 6 When being evaporator (when being worked under independent heating function), refrigerant also occurs in the high-pressure side inside the first four-way valve 70 The phenomenon of stagnation.

As can be seen here, when the scheme shown in Fig. 8 works long hours under separate refrigeration function and independent heating function, at it Due to the indirect heat exchange between the high temperature and high pressure gas of stagnation and the low temperature low pressure gas of flowing, and four-way valve inside four-way valve High-pressure side surface of shell therefore can produce refrigerant liquid to the radiating of surrounding environment in the high-pressure side inside four-way valve, this A little refrigerants can be accumulated in the high-pressure side inside four-way valve and the 3rd heat exchanger 8, on the one hand can cause circulating mass of refrigerant Reduce, it is serious in the case of, the normal work of operation of air conditioning systems can be influenceed, and to eliminate this adverse effect, certainly will needed again Increase the refrigerant charge of operation of air conditioning systems；On the other hand when the refrigerant liquid of these generations is accumulated in four-way valve When in the high-pressure side in portion, during four-way valve commutates, it is possible to occur liquid hammer, cause the damage of four-way valve, therefore shown in Fig. 8 When scheme under separate refrigeration function and independent heating function due to working, respectively in its four-way valve of the second four-way valve 80 and first The refrigerant stagnation problem occurred in 70 internal high pressure sides, therefore whole system job insecurity, easily break down.

The content of the invention

It is avoided that refrigerant in the high-pressure side of four-way valve and heat exchange in the course of the work it is an object of the invention to provide a kind of It is detained in device, and in the winter time in the course of work, defrost of being absorbed heat from environment can be realized, and air conditioner refrigerating simple in construction is set It is standby.

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

1st, a kind of operation of air conditioning systems, including the first compression mechanism (1), the first four-way valve (70), the second four-way valve (80), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), the 3rd throttle mechanism (7), One flow direction control valve (41), it is characterized in that：The operation of air conditioning systems also includes the second compression mechanism (2)；First four-way valve (70) low pressure node (73) is connected by the 65th pipeline (65) with the low pressure node (83) of second four-way valve (80), The high voltage nodes (71) of first four-way valve (70) pass sequentially through the 60th pipeline (60), the second compression mechanism (2) port of export, The low pressure node (73) of second compression mechanism (2) arrival end, the 68th pipeline (68) and first four-way valve (70) and the The 65th pipeline (65) between the low pressure node (83) of two four-way valves (80) is connected, the high pressure of second four-way valve (80) Node (81) pass sequentially through the 62nd pipeline (62), the first compression mechanism (1) port of export, the first compression mechanism (1) arrival end, The low pressure node (73) and the low pressure section of the second four-way valve (80) of 63rd pipeline (63) also with first four-way valve (70) The 65th pipeline (65) between point (83) is connected, and the second commutation node (84) of second four-way valve (80) is passed sequentially through 67th pipeline (67), the 3rd heat exchanger (8), the 3rd throttle mechanism (7), the 58th pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), the 64th pipeline (64) are connected with the second commutation node (74) of first four-way valve (70), First commutation node (82) of second four-way valve (80) passes through the 51st pipeline (51) and first four-way valve (70) First commutation node (72) be connected, one end of second heat exchanger (4) passes sequentially through the first flow direction control valve (41), the 5th The 58th pipeline (58) between 12 pipelines (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) is connected, The other end of second heat exchanger (4) is saved by the first commutation of the 61st pipeline (61) and first four-way valve (70) The 51st pipeline (51) between point (72) and the first commutation node (82) of the second four-way valve (80) is connected.

2nd, a kind of operation of air conditioning systems, including the first compression mechanism (1), the first four-way valve (70), the second four-way valve (80), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), the 3rd throttle mechanism (7), Four check valves (24) and the 5th check valve (25), it is characterized in that：The operation of air conditioning systems also includes the second compression mechanism (2)；Institute The low pressure node (73) for stating the first four-way valve (70) passes through the 65th pipeline (65) and the low pressure of second four-way valve (80) Node (83) is connected, and the high voltage nodes (71) of first four-way valve (70) pass sequentially through the 60th pipeline (60), the second compression Mechanism (2) port of export, the second compression mechanism (2) arrival end, the 68th pipeline (68) are low with first four-way valve (70) The 65th pipeline (65) between node (73) and the low pressure node (83) of the second four-way valve (80) is pressed to be connected, the described 2nd 4 The high voltage nodes (81) of port valve (80) pass sequentially through the 62nd pipeline (62), the first compression mechanism (1) port of export, the first compression The low pressure node (73) and the second four-way of mechanism (1) arrival end, the 63rd pipeline (63) also with first four-way valve (70) The 65th pipeline (65) between the low pressure node (83) of valve (80) is connected, the second commutation section of second four-way valve (80) Point (84) passes sequentially through the 67th pipeline (67), the 3rd heat exchanger (8), the 3rd throttle mechanism (7), the 58th pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), the 64th pipeline (64) and the second of first four-way valve (70) The node (74) that commutates is connected, and the first commutation node (82) of second four-way valve (80) passes sequentially through the 51st pipeline (51), the 4th check valve (24) arrival end, the 4th check valve (24) port of export, the 5th check valve (25) port of export, the 5th unidirectional Valve (25) arrival end is connected with the first commutation node (72) of first four-way valve (70), and the one of second heat exchanger (4) End passes through the 58th pipe between the 52nd pipeline (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) Road (58) is connected, and the other end of second heat exchanger (4) passes through the 61st pipeline (61) and the 4th check valve (24) Pipeline between the port of export and the 5th check valve (25) port of export is connected.

Compared with prior art, its advantage is the present invention：

1. delay of the refrigerant in four-way valve and heat exchanger operationally, can be avoided；

2. in the winter course of work, defrost of being absorbed heat from environment can be realized；

3. it is simple in construction；

4. the present invention is applied to industrial and civilian operation of air conditioning systems, it is particularly suitable for use in being used as low-temperature heat source using air Occasion.

Brief description of the drawings

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

Fig. 2 is the change programme structural representation of the embodiment of the present invention 1；

Fig. 3 is the structural representation of the embodiment of the present invention 2；

Fig. 4 is the structural representation of the embodiment of the present invention 3；

Fig. 5 is the structural representation of the embodiment of the present invention 4；

Fig. 6 is the structural representation of the embodiment of the present invention 5；

Fig. 7 is the change programme structural representation of the embodiment of the present invention 5；

Fig. 8 is prior art construction schematic diagram.

Embodiment

Present invention is described in further detail below in conjunction with the accompanying drawings.

Embodiment 1

As shown in figure 1, the present embodiment, which is a kind of energy, realizes refrigeration and the operation of air conditioning systems of heating function, have for whole year Refrigeration, the occasion of heating demands.Whole equipment includes consisting of part：First compression mechanism 1, the second compression mechanism 2, first Four-way valve 70, the second four-way valve 80, first throttle mechanism 5, the 3rd throttle mechanism 7, First Heat Exchanger 3, the second heat exchanger 4, Three heat exchangers 8, the first flow direction control valve 41.First throttle mechanism 5, the 3rd throttle mechanism 7 are all electric expansion valve；The course of work In, the first flow direction control valve 41 is substituted by second throttle body 6, and second throttle body 6 is also electric expansion valve.

The operation of air conditioning systems is in annual running, it is possible to achieve a variety of functions.During work, First Heat Exchanger 3, Three heat exchangers 8 are all heat source side heat exchangers, and summer and spring and autumn are as condenser, produced by being distributed to environment in process of refrigerastion Condensation heat, winter, as evaporator, absorbs heat from environment；Second heat exchanger 4 is user side heat exchanger, summer and spring and autumn It is user's cooling as evaporator, winter, as condenser, is user's heating.

Workflow difference under each function is as described below.

(1) separate refrigeration function

Scheme one：First compression mechanism 1 does not work, the normal work of the second compression mechanism 2；First Heat Exchanger 3, second exchanges heat Device 4 works, and the 3rd heat exchanger 8 does not work.

Under this scheme, freeze produced by condensation heat all by First Heat Exchanger 3 be discharged into environment (outdoor air or Cooling water or soil etc.), the second heat exchanger 4 freezes for user.

During work, the standard-sized sheet of first throttle mechanism 5, the normal work of second throttle body 6, the 3rd throttle mechanism 7 is closed.First The high voltage nodes 71 of four-way valve 70 are communicated with the first four-way valve 70 second commutation node 74, the first four-way valve 70 first commutation node 72 Communicated with the low pressure node 73 of the first four-way valve 70.The high voltage nodes 81 of second four-way valve 80 and the second four-way valve 80 first commutation node 82 are communicated, and the second four-way valve 80 second commutation node 84 is communicated with the low pressure node 83 of the second four-way valve 80.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, sequentially pass through the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 second commutation node 74, the 64th pipeline 64, First Heat Exchanger 3, First throttle mechanism 5, the 58th pipeline 58, the 52nd pipeline 52, second throttle body 6, the second heat exchanger the 4, the 60th One pipeline 61, the 51st pipeline 51, the first four-way valve 70 first commutation node 72, the low pressure node 73 of the first four-way valve 70, the 65 pipelines 65, the 68th pipeline 68, return to the arrival end of the second compression mechanism 2, are compressed into the second compression mechanism 2, Complete one cycle.

Scheme two：The normal work of first compression mechanism 1, the second compression mechanism 2 does not work；First Heat Exchanger 3 does not work, the Two heat exchangers 4, the normal work of the 3rd heat exchanger 8.

Under this scheme, freeze produced by condensation heat all by the 3rd heat exchanger 8 be discharged into environment (outdoor air or Cooling water or soil etc.), the second heat exchanger 4 is used for for user's refrigeration.

During work, first throttle mechanism 5 is closed, the normal work of second throttle body 6, the standard-sized sheet of the 3rd throttle mechanism 7.First The high voltage nodes 71 of four-way valve 70 are communicated with the first four-way valve 70 first commutation node 72, the first four-way valve 70 second commutation node 74 Communicated with the low pressure node 73 of the first four-way valve 70.The high voltage nodes 81 of second four-way valve 80 and the second four-way valve 80 second commutation node 84 are communicated, and the second four-way valve 80 first commutation node 82 is communicated with the low pressure node 83 of the second four-way valve 80.

Its workflow is：Refrigerant sequentially passes through the 62nd pipeline after the discharge of the port of export of the first compression mechanism 1 62nd, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 second commutation node 84, the heat exchange of the 67th pipeline the 67, the 3rd Device 8, the 3rd throttle mechanism 7, the 58th pipeline 58, the 52nd pipeline 52, second throttle body 6, the second heat exchanger 4, 61 pipelines 61, the 51st pipeline 51, the second four-way valve 80 first commutation node 82, the low pressure node of the second four-way valve 80 83rd, the 65th pipeline 65, the 63rd pipeline 63, the arrival end of the first compression mechanism 1 is returned to, into the quilt of the first compression mechanism 1 Compression, completes one cycle.

Scheme three：First compression mechanism 1, the second compression mechanism 2 all normal works；First Heat Exchanger 3, the second heat exchanger 4, 3rd heat exchanger 8 also all normal work.

Under this scheme, the condensation heat produced by freezing is discharged into environment (room by the heat exchanger 8 of First Heat Exchanger 3 and the 3rd Outer air or cooling water or soil etc.), the second heat exchanger 4 is used for for user's refrigeration.

During work, first throttle mechanism 5, the standard-sized sheet of the 3rd throttle mechanism 7, the normal work of second throttle body 6.First four-way The high voltage nodes 71 of valve 70 and the first four-way valve 70 second commutation node 74 are communicated, the first four-way valve 70 first commutation node 72 and the The low pressure node 73 of one four-way valve 70 is communicated.The high voltage nodes 81 of second four-way valve 80 and the second four-way valve 80 second commutation phase of node 84 Logical, the second four-way valve 80 first commutation node 82 is communicated with the low pressure node 83 of the second four-way valve 80.

Its workflow is：Refrigerant into the 65th pipeline 65 is divided into two-way；The first via passes through the 68th After pipeline 68, compressed into the second compression mechanism 2, after the discharge of the port of export of the second compression mechanism 2, sequentially pass through the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 second commutation node 74, the 64th pipeline 64, first are changed Hot device 3, first throttle mechanism 5, into the 58th pipeline 58；Second tunnel is after the 63rd pipeline 63, into the first pressure Contracting mechanism 1 is compressed, and after the discharge of the port of export of the first compression mechanism 1, sequentially passes through the 62nd pipeline 62, the second four-way valve 80 High voltage nodes 81, the second four-way valve 80 second commutation node 84, the 67th pipeline 67, the 3rd heat exchanger 8, the 3rd throttle mechanism 7, also into the 58th pipeline 58；Two-way refrigerant sequentially passes through the 52nd pipeline after the mixing of the 58th pipeline 58 52nd, second throttle body 6, the second heat exchanger 4, the 61st pipeline 61, are divided into two-way again into the 51st pipeline 51；The The second four-way valve 80 first commutation node 82, the low pressure node 83 of the second four-way valve 80 are sequentially passed through all the way, are returned to the 65th Pipeline 65；Second tunnel sequentially passes through the first four-way valve 70 first commutation node 72, the low pressure node 73 of the first four-way valve 70, also returns to 65th pipeline 65；Two-way is divided into two-way, respectively enters two compressor structures and pressed again after the mixing of the 65th pipeline 65 Contracting, completes one cycle.

(2) winter independent heat-production functions

Scheme one：The normal work of first compression mechanism 1, the second compression mechanism 2 does not work；First Heat Exchanger 3 does not work, the Two heat exchangers 4, the normal work of the 3rd heat exchanger 8.

Under this scheme, the 3rd draw heat from environment of heat exchanger 8, the heat drawn is used in the second heat exchanger 4 Heated in for user, First Heat Exchanger 3 does not work.

During work, first throttle mechanism 5 is closed, the standard-sized sheet of second throttle body 6, the normal work of the 3rd throttle mechanism 7.First The high voltage nodes 71 of four-way valve 70 are communicated with the first four-way valve 70 first commutation node 72, the first four-way valve 70 second commutation node 74 Communicated with the low pressure node 73 of the first four-way valve 70.The high voltage nodes 81 of second four-way valve 80 and the second four-way valve 80 first commutation node 82 are communicated, and the second four-way valve 80 second commutation node 84 is communicated with the low pressure node 83 of the second four-way valve 80.

Its workflow is：Refrigerant sequentially passes through the 62nd pipeline after the discharge of the port of export of the first compression mechanism 1 62nd, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 first commutation node 82, the 51st pipeline the 51, the 61st Pipeline 61, the second heat exchanger 4, second throttle body 6, the 52nd pipeline 52, the 58th pipeline 58, the 3rd throttle mechanism 7, 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 second commutation node 84, the low pressure node 83 of the second four-way valve 80, 65th pipeline 65, the 63rd pipeline 63, return to the arrival end of the first compression mechanism 1, are pressed into the first compression mechanism 1 Contracting, completes one cycle.

Scheme two：First compression mechanism 1 does not work, the normal work of the second compression mechanism 2；3rd heat exchanger 8 does not work, the One heat exchanger 3, the normal work of the second heat exchanger 4.

Under this scheme, the draw heat from environment of First Heat Exchanger 3, the heat drawn is used in the second heat exchanger 4 Heated in for user, the 3rd heat exchanger 8 does not work.

During work, the normal work of first throttle mechanism 5, the standard-sized sheet of second throttle body 6, the 3rd throttle mechanism 7 is closed.First The high voltage nodes 71 of four-way valve 70 are communicated with the first four-way valve 70 first commutation node 72, the first four-way valve 70 second commutation node 74 Communicated with the low pressure node 73 of the first four-way valve 70.The high voltage nodes 81 of second four-way valve 80 and the second four-way valve 80 first commutation node 82 are communicated, and the second four-way valve 80 second commutation node 84 is communicated with the low pressure node 83 of the second four-way valve 80.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, sequentially pass through the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 first commutation node 72, the 51st pipeline 51, the 61st pipeline 61st, the second heat exchanger 4, second throttle body 6, the 52nd pipeline 52, the 58th pipeline 58, first throttle mechanism 5, first Heat exchanger 3, the 64th pipeline 64, the first four-way valve 70 second commutation node 74, the low pressure node the 73, the 6th of the first four-way valve 70 15 pipelines 65, the 68th pipeline 68, return to the arrival end of the second compression mechanism 2, are compressed into the second compression mechanism 2, complete Into one cycle.

Under this scheme, First Heat Exchanger 3, the 3rd draw heat from environment of heat exchanger 8, the heat drawn, It is used in two heat exchangers 4 for user's heating.

During work, first throttle mechanism 5, the normal work of the 3rd throttle mechanism 7, the standard-sized sheet of second throttle body 6.First four-way The high voltage nodes 71 of valve 70 and the first four-way valve 70 first commutation node 72 are communicated, the first four-way valve 70 second commutation node 74 and the The low pressure node 73 of one four-way valve 70 is communicated.The high voltage nodes 81 of second four-way valve 80 and the second four-way valve 80 first commutation phase of node 82 Logical, the second four-way valve 80 second commutation node 84 is communicated with the low pressure node 83 of the second four-way valve 80.

Its workflow is：Refrigerant into the 65th pipeline 65 is divided into two-way；The first via passes through the 68th After pipeline 68, compressed into the second compression mechanism 2, after the discharge of the port of export of the second compression mechanism 2, sequentially pass through the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 first commutation node 72, into the 51st pipeline 51；The Two tunnels are compressed after the 63rd pipeline 63 into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, The 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 first commutation node 82 are sequentially passed through, is also entered Enter the 51st pipeline 51；Two-way sequentially passes through the 61st pipeline 61, the second heat exchanger after the mixing of the 51st pipeline 51 4th, second throttle body 6, the 52nd pipeline 52, are divided into two-way into the 58th pipeline 58；The first via sequentially passes through Three throttle mechanisms 7, the 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 second commutation node 84, the second four-way valve 80 low pressure nodes 83, into the 65th pipeline 65；Second tunnel sequentially passes through first throttle mechanism 5, First Heat Exchanger the 3, the 6th 14 pipelines 64, the first four-way valve 70 second commutation node 74, the low pressure node 73 of the first four-way valve 70, also enter the 65th and manage Road 65；Two-way is divided into two-way again after the mixing of the 65th pipeline 65；The first via passes through the 63rd pipeline 63, is returned to The arrival end of first compression mechanism 1；The 68th pipeline 68 is passed through on second tunnel, is returned to the arrival end of the second compression mechanism 2, so far complete Into one cycle.

(3) winter frost removing function

1) defrosting of First Heat Exchanger 3

In the case of such a defrosting, the first compression mechanism 1 does not work, the normal work of the second compression mechanism 2；First Heat Exchanger 3rd, the normal work of the 3rd heat exchanger 8, the second heat exchanger 4 does not work.

In the case of such a defrosting, the 3rd draw heat from environment of heat exchanger 8, the heat drawn is changed for first The defrost of hot device 3；Second heat exchanger 4 does not work.

During work, the standard-sized sheet of first throttle mechanism 5, the normal work of the 3rd throttle mechanism 7, second throttle body 6 is closed.First The high voltage nodes 71 of four-way valve 70 are communicated with the first four-way valve 70 second commutation node 74, the first four-way valve 70 first commutation node 72 Communicated with the low pressure node 73 of the first four-way valve 70.The high voltage nodes 81 of second four-way valve 80 and the second four-way valve 80 first commutation node 82 are communicated, and the second four-way valve 80 second commutation node 84 is communicated with the low pressure node 83 of the second four-way valve 80.Second heat exchanger 4 not work Make, but during defrosting under the pressure of inspiration(Pi) in the second compression mechanism 2, therefore refrigerant will not stop wherein during defrosting It is stagnant.In addition, the arrival end and the port of export of the first compression mechanism 1 are also under the pressure of inspiration(Pi) of the second compression mechanism 2.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, sequentially pass through the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 second commutation node 74, the 64th pipeline 64, First Heat Exchanger 3, First throttle mechanism 5, the 58th pipeline 58, the 3rd throttle mechanism 7, the 3rd heat exchanger 8, the 67th pipeline the 67, the 2nd 4 The commutation of port valve 80 second node 84, the low pressure node 83 of the second four-way valve 80, the 65th pipeline 65, the 68th pipeline 68, are returned To the arrival end of the second compression mechanism 2, compressed into the second compression mechanism 2, complete once defrosting circulation.

2) defrosting of the 3rd heat exchanger 8

In the case of such a defrosting, the normal work of the first compression mechanism 1, the second compression mechanism 2 does not work；First Heat Exchanger 3rd, the normal work of the 3rd heat exchanger 8, the second heat exchanger 4 does not work.

In the case of such a defrosting, the draw heat from environment of First Heat Exchanger 3, the heat drawn is changed for the 3rd The defrost of hot device 8；Second heat exchanger 4 does not work.

During work, the normal work of first throttle mechanism 5, the standard-sized sheet of the 3rd throttle mechanism 7, second throttle body 6 is closed.First The high voltage nodes 71 of four-way valve 70 are communicated with the first four-way valve 70 first commutation node 72, the first four-way valve 70 second commutation node 74 Communicated with the low pressure node 73 of the first four-way valve 70.The high voltage nodes 81 of second four-way valve 80 and the second four-way valve 80 second commutation node 84 are communicated, and the second four-way valve 80 first commutation node 82 is communicated with the low pressure node 83 of the second four-way valve 80.Second heat exchanger 4 not work Make, but during defrosting under the pressure of inspiration(Pi) in the first compression mechanism 1, therefore refrigerant will not stop wherein during defrosting It is stagnant.In addition, the arrival end and the port of export of the second compression mechanism 2 are also under the pressure of inspiration(Pi) of the first compression mechanism 1.

Its workflow is：Refrigerant sequentially passes through the 62nd pipeline after the discharge of the port of export of the first compression mechanism 1 62nd, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 second commutation node 84, the heat exchange of the 67th pipeline the 67, the 3rd Device 8, the 3rd throttle mechanism 7, the 58th pipeline 58, first throttle mechanism 5, First Heat Exchanger 3, the 64th pipeline 64, One four-way valve 70 second commutation node 74, the low pressure node 73 of the first four-way valve 70, the 65th pipeline 65, the 63rd pipeline 63, the arrival end of the first compression mechanism 1 is returned to, is compressed into the first compression mechanism 1, once defrosting circulation is completed.

Operation of air conditioning systems shown in Fig. 1 is in practical work process, in order to avoid refrigerant flows back into compression mechanism, First compression mechanism 1, the exhaust outlet of the second compression mechanism 2 can set a check valve respectively, as shown in Fig. 2 now, first is single It is to valve 21, the connected mode of the second check valve 22 in systems：The arrival end of first check valve 21 is exported with the first compression mechanism 1 End is connected, and the port of export of the first check valve 21 is connected by the 62nd pipeline 62 with the high voltage nodes 81 of the second four-way valve 80.Second The arrival end of check valve 22 is connected with the port of export of the second compression mechanism 2, the port of export of the second check valve 22 by the 60th pipeline 60 with The high voltage nodes 71 of first four-way valve 70 are connected.

Scheme shown in Fig. 2 can also realize that the institute of scheme shown in Fig. 1 is functional.First check valve 21, the second check valve 22 Connected mode in system shown in Figure 2 is also applied for scheme described in all embodiments of the present invention.

Embodiment 2

As shown in figure 3, the present embodiment, which is also a kind of energy, realizes refrigeration and the operation of air conditioning systems of heating function, for whole year There are refrigeration, the occasion of heating demands.The difference of scheme shown in Fig. 3 and scheme shown in Fig. 1 is：Compared with scheme shown in Fig. 1, Fig. 3 Shown scheme adds second flow direction control valve 42 in systems, as shown in Figure 3；Second flow direction control valve 42 is in systems Mounting means be：Second flow direction control valve 42 be arranged on the 65th pipeline 65 on, and the one end of the second flow direction control valve 42 with 63rd pipeline 63 is connected, and the other end of the second flow direction control valve 42 is connected with the 68th pipeline 68.

In the course of work, when the second flow direction control valve 42 is opened, scheme shown in Fig. 3 can also realize Fig. 1 institutes of embodiment 1 Show that the institute of scheme is functional, and when realizing identical function, workflow is also identical.

In the course of work, when the second flow direction control valve 42 is closed, scheme shown in Fig. 3 is in the winter time under independent heat-production functions, Can realize using two different evaporating temperatures, while from two temperature different low-temperature heat source draw heat purpose, Now, the first compression mechanism 1, the second compression mechanism 2 all normal works, and variable conpacitance compressor structure is all used, for example：Frequency conversion pressure Contracting machine, because in the course of work, the first compression mechanism 1, the second compression mechanism 2 are by changing the method for working frequency respectively with not With evaporating temperature absorb heat from two low-temperature heat sources, therefore, with using only a relatively low evaporating temperature while from two temperature The different low-temperature heat source draw heat of degree is compared, and scheme is more energy efficient shown in Fig. 3.

Worked when under scheme shown in Fig. 3 in the winter time independent heat-production functions, the second flow direction control valve 42 is closed, and the first compression When mechanism 1, the second compression mechanism 2 all work, its workflow and scheme shown in the Fig. 1 of embodiment 1 independent heat-production functions in the winter time The workflow of lower scheme three is identical；It is not both uniquely：During due to work, the second flow direction control valve 42 is closed, therefore, 65th pipeline 65 is divided into independent two parts.

Mounting means of second flow direction control valve 42 in system shown in Figure 3 is also applied for all embodiment institutes of the present invention State scheme.

Embodiment 3

As shown in figure 4, the present embodiment is a kind of operation of air conditioning systems with two heat source side heat exchangers, have for whole year The occasion of heat demand, for example：Production and living hot water.Whole equipment includes consisting of part：First compression mechanism 1, second Compression mechanism 2, the first four-way valve 70, the second four-way valve 80, first throttle mechanism 5, the 3rd throttle mechanism 7, First Heat Exchanger 3, Second heat exchanger 4, the 3rd heat exchanger 8, the first flow direction control valve 41.First throttle mechanism 5, the 3rd throttle mechanism 7 are all electronics Expansion valve；In the course of work, the first flow direction control valve 41 is substituted by the 3rd check valve 23, and the entrance of the 3rd check valve 23 End is connected with the second heat exchanger 4, and the port of export of the 3rd check valve 23 is connected with the 52nd pipeline 52,

The operation of air conditioning systems is in annual running, it is possible to achieve be user's heat supply.During work, First Heat Exchanger 3, 3rd heat exchanger 8 is all heat source side heat exchanger, and as evaporator, heat is absorbed from environment；Second heat exchanger 4 is that user side is changed Hot device, is user's heat supply, for example as condenser：Production and living hot water.

Workflow difference under each function is as described below.

(1) heat-production functions

Under this scheme, the 3rd draw heat from environment of heat exchanger 8, the heat drawn is used in the second heat exchanger 4 In for user's heat supply, First Heat Exchanger 3 does not work.

During work, first throttle mechanism 5 is closed, the normal work of the 3rd throttle mechanism 7.The high voltage nodes 71 of first four-way valve 70 Communicated with the first four-way valve 70 first commutation node 72, the low pressure of 74 and first four-way valve of the first four-way valve 70 second commutation node 70 Node 73 is communicated.The high voltage nodes 81 of second four-way valve 80 are communicated with the second four-way valve 80 first commutation node 82, the second four-way valve 80 second commutation nodes 84 are communicated with the low pressure node 83 of the second four-way valve 80.

Its workflow is：Refrigerant sequentially passes through the 62nd pipeline after the discharge of the port of export of the first compression mechanism 1 62nd, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 first commutation node 82, the 51st pipeline the 51, the 61st Pipeline 61, the second heat exchanger 4, the 3rd check valve 23, the 52nd pipeline 52, the 58th pipeline 58, the 3rd throttle mechanism 7, 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 second commutation node 84, the low pressure node 83 of the second four-way valve 80, 65th pipeline 65, the 63rd pipeline 63, return to the arrival end of the first compression mechanism 1, are pressed into the first compression mechanism 1 Contracting, completes one cycle.

Under this scheme, the draw heat from environment of First Heat Exchanger 3, the heat drawn is used in the second heat exchanger 4 In for user's heat supply, the 3rd heat exchanger 8 does not work.

During work, the normal work of first throttle mechanism 5, the 3rd throttle mechanism 7 is closed.The high voltage nodes 71 of first four-way valve 70 Communicated with the first four-way valve 70 first commutation node 72, the low pressure of 74 and first four-way valve of the first four-way valve 70 second commutation node 70 Node 73 is communicated.The high voltage nodes 81 of second four-way valve 80 are communicated with the second four-way valve 80 first commutation node 82, the second four-way valve 80 second commutation nodes 84 are communicated with the low pressure node 83 of the second four-way valve 80.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, sequentially pass through the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 first commutation node 72, the 51st pipeline 51, the 61st pipeline 61st, the second heat exchanger 4, the 3rd check valve 23, the 52nd pipeline 52, the 58th pipeline 58, first throttle mechanism 5, first Heat exchanger 3, the 64th pipeline 64, the first four-way valve 70 second commutation node 74, the low pressure node the 73, the 6th of the first four-way valve 70 15 pipelines 65, the 68th pipeline 68, return to the arrival end of the second compression mechanism 2, are compressed into the second compression mechanism 2, complete Into one cycle.

Under this scheme, First Heat Exchanger 3, the 3rd draw heat from environment of heat exchanger 8, the heat drawn, It is used to be user's heat supply in two heat exchangers 4.

During work, first throttle mechanism 5, the normal work of the 3rd throttle mechanism 7.The high voltage nodes 71 of first four-way valve 70 and One four-way valve 70 first commutation node 72 is communicated, the low pressure node of 74 and first four-way valve of the first four-way valve 70 second commutation node 70 73 communicate.The high voltage nodes 81 of second four-way valve 80 and the second four-way valve 80 first commutation node 82 are communicated, the second four-way valve 80 the Two commutation nodes 84 are communicated with the low pressure node 83 of the second four-way valve 80.

Its workflow is：Refrigerant into the 65th pipeline 65 is divided into two-way；The first via passes through the 68th After pipeline 68, compressed into the second compression mechanism 2, after the discharge of the port of export of the second compression mechanism 2, sequentially pass through the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 first commutation node 72, into the 51st pipeline 51；The Two tunnels are compressed after the 63rd pipeline 63 into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, The 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 first commutation node 82 are sequentially passed through, is also entered Enter the 51st pipeline 51；Two-way sequentially passes through the 61st pipeline 61, the second heat exchanger after the mixing of the 51st pipeline 51 4th, the 3rd check valve 23, the 52nd pipeline 52, are divided into two-way into the 58th pipeline 58；The first via sequentially passes through the 3rd Throttle mechanism 7, the 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 second commutation node 84, the second four-way valve 80 Low pressure node 83, into the 65th pipeline 65；Second tunnel sequentially passes through first throttle mechanism 5, First Heat Exchanger the 3, the 60th Four pipelines 64, the first four-way valve 70 second commutation node 74, the low pressure node 73 of the first four-way valve 70, also into the 65th pipeline 65；Two-way is divided into two-way again after the mixing of the 65th pipeline 65；The first via passes through the 63rd pipeline 63, is returned to the The arrival end of one compression mechanism 1；The 68th pipeline 68 is passed through on second tunnel, is returned to the arrival end of the second compression mechanism 2, so far completes One cycle.

(2) winter frost removing function

1) defrosting of First Heat Exchanger 3

During work, the standard-sized sheet of first throttle mechanism 5, the normal work of the 3rd throttle mechanism 7.The high voltage nodes 71 of first four-way valve 70 Communicated with the first four-way valve 70 second commutation node 74, the low pressure of 72 and first four-way valve of the first four-way valve 70 first commutation node 70 Node 73 is communicated.The high voltage nodes 81 of second four-way valve 80 are communicated with the second four-way valve 80 first commutation node 82, the second four-way valve 80 second commutation nodes 84 are communicated with the low pressure node 83 of the second four-way valve 80.Second heat exchanger 4 does not work, but locates during defrosting In under the pressure of inspiration(Pi) of the second compression mechanism 2, therefore refrigerant will not be stagnated wherein during defrosting；In addition, the first compression The arrival end and the port of export of mechanism 1 are also under the pressure of inspiration(Pi) of the second compression mechanism 2.

2) defrosting of the 3rd heat exchanger 8

During work, the normal work of first throttle mechanism 5, the standard-sized sheet of the 3rd throttle mechanism 7.The high voltage nodes 71 of first four-way valve 70 Communicated with the first four-way valve 70 first commutation node 72, the low pressure of 74 and first four-way valve of the first four-way valve 70 second commutation node 70 Node 73 is communicated.The high voltage nodes 81 of second four-way valve 80 are communicated with the second four-way valve 80 second commutation node 84, the second four-way valve 80 first commutation nodes 82 are communicated with the low pressure node 83 of the second four-way valve 80.Second heat exchanger 4 does not work, but locates during defrosting In under the pressure of inspiration(Pi) of the first compression mechanism 1, therefore refrigerant will not be stagnated wherein during defrosting；In addition, the second compression The arrival end and the port of export of mechanism 2 are also under the pressure of inspiration(Pi) of the first compression mechanism 1.

Embodiment 4

As shown in figure 5, the present embodiment is also a kind of operation of air conditioning systems with two heat source side heat exchangers, for whole year There is the occasion of heat demand, for example：Production and living hot water.Compared with scheme shown in the Fig. 4 of embodiment 3, scheme is in system shown in Fig. 5 In add a liquid reservoir 50, second flow direction control valve 42, the 4th throttle mechanism 9.

The connected mode of liquid reservoir 50 in systems is：A liquid reservoir 50, first are provided with the 58th pipeline 58 The one end of throttle mechanism 5 is connected with First Heat Exchanger 3, and the other end of first throttle mechanism 5 passes through the 58th pipeline 58 and liquid reservoir 50 are connected；The one end of 3rd throttle mechanism 7 is connected with the 3rd heat exchanger 8, and the other end of the 3rd throttle mechanism 7 is also by the 58th pipe Road 58 is connected with liquid reservoir 50；The one end of first flow direction control valve 41 is connected with the second heat exchanger 4, and the first flow direction control valve 41 is another End is connected by the 52nd pipeline 52 with the pipeline 58 of liquid reservoir 50 or the 58th.The above-described liquid reservoir of the present embodiment 50 connection method in systems, is also applied for scheme described in all embodiments of the present invention.

4th throttle mechanism 9 in system (i.e.：The present invention air conditioner refrigerating it is standby) in connection method have following five kinds of modes：

1) one end of the 4th throttle mechanism 9 is connected with liquid reservoir 50, the other end of the 4th throttle mechanism 9 and the first compression mechanism 1 Intermediate fill gas mouth be connected (as shown in Figure 5).2) one end of the 4th throttle mechanism 9 is connected with liquid reservoir 50, and the 4th throttle mechanism 9 is another One end is connected with the intermediate fill gas mouth of the second compression mechanism 2.3) one end of the 4th throttle mechanism 9 is connected with liquid reservoir 50, Section four The stream other end of mechanism 9 is connected with the 65th pipeline 65.4) one end of the 4th throttle mechanism 9 is connected with liquid reservoir 50, the 4th throttling The other end of mechanism 9 is connected with the 63rd pipeline 63.5) one end of the 4th throttle mechanism 9 is connected with liquid reservoir 50, the 4th throttling machine The other end of structure 9 is connected with the 68th pipeline 68.

The connection method of above-described 4th throttle mechanism 9 of the present embodiment in systems, is also applied for the institute of the present invention There is scheme described in embodiment.

As shown in figure 5, the connected mode of the second flow direction control valve 42 in systems is：Second flow direction control valve 42 is arranged on On 65th pipeline 65, and the one end of the second flow direction control valve 42 is connected with the 63rd pipeline 63, the second flow direction control valve 42 The other end is connected with the 68th pipeline 68.

In the course of work, when the second flow direction control valve 42 is opened, the 4th throttle mechanism 9 is closed, scheme also may be used shown in Fig. 5 To realize that the institute of scheme shown in the Fig. 4 of embodiment 3 is functional, and when realizing identical function, workflow is also identical.

In the course of work, when the second flow direction control valve 42 is closed, scheme shown in Fig. 5 is under heat-production functions, it is possible to achieve Using two different evaporating temperatures, while from two temperature different low-temperature heat source draw heat purpose, reach energy-conservation Purpose.Now, the first compression mechanism 1, the second compression mechanism 2 all normal works, and all use variable conpacitance compressor structure, example Such as：Frequency-changeable compressor；In the course of work, the first compression mechanism 1, the second compression mechanism 2 are divided by changing the method for working frequency Not absorbed heat with different evaporating temperatures from two low-temperature heat sources.

As shown in figure 5, during work, the second flow direction control valve 42 is closed；First compression mechanism 1, the second compression mechanism 2 are all just Often work；First throttle mechanism 5, the 3rd throttle mechanism 7, the 4th throttle mechanism 9 also all normal work.3rd heat exchanger 8 is from temperature Absorbed heat in the relatively low low-temperature heat source of degree；First Heat Exchanger 3 absorbs heat from the higher low-temperature heat source of temperature；Inhaled from two low-temperature heat sources The heat taken, it is user's heat supply to be all used for by the second heat exchanger 4；First flow direction control valve 41 is equally by the 3rd check valve 23 are substituted.Whole workflow is as follows：The refrigerant come out from the second heat exchanger 4, sequentially passes through the entrance of the 3rd check valve 23 End, the port of export of the 3rd check valve 23, the 52nd pipeline 52, into liquid reservoir 50 after be divided into three tunnels；First via refrigerant is passed through 4th throttle mechanism 9 is throttled into after intermediate pressure, and the second vapor injection of the first compression mechanism 1 is entered by the 66th pipeline 66 Mouthful；Second road refrigerant is throttled into low pressure after the 58th pipeline 58 into the 3rd throttle mechanism 7, then, passes through successively Cross the 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 second commutation node 84, the low pressure node of the second four-way valve 80 83rd, the 65th pipeline 65, the 63rd pipeline 63, intermediate pressure is compressed into the first compression mechanism 1, then with from centre The first via refrigerant that gas supplementing opening enters the first compression mechanism 1 is mixed, and then proceedes to be compressed into high-pressure refrigerant；High-pressure refrigeration Agent from the port of export of the first compression mechanism 1 discharge after, sequentially pass through the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, Second four-way valve 80 first commutation node 82, the 51st pipeline 51, into the 61st pipeline 61；3rd road refrigerant is same After the 58th pipeline 58, middle pressure is throttled into first throttle mechanism 5, then, then First Heat Exchanger is sequentially passed through 3rd, the 64th pipeline 64, the first four-way valve 70 second commutation node 74, the low pressure node the 73, the 65th of the first four-way valve 70 pipe Road 65, the 68th pipeline 68, high-pressure refrigerant is compressed into into the second compression mechanism 2；High-pressure refrigerant is pressed from second After the port of export discharge of contracting mechanism 2, the 60th pipeline 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 are sequentially passed through First commutation node 72, the 51st pipeline 51, also into the 61st pipeline 61；Two-way refrigerant is in the 61st pipeline 61 After mixing, the second heat exchanger 4 is entered back into, one cycle is so far completed.

Embodiment 5

As shown in fig. 6, the present embodiment is also a kind of operation of air conditioning systems with two heat source side heat exchangers, for whole year There is the occasion of heat demand, for example：Production and living hot water.Compared with scheme shown in the Fig. 4 of embodiment 3, scheme is in system shown in Fig. 6 In add the 4th check valve 24, the 5th check valve 25.As shown in fig. 6, now, the 4th check valve the 24, the 5th is single It is to the connected mode of valve 25 in systems：The arrival end of 4th check valve 24 passes through the 51st pipeline 51 and the second four-way valve 80 First commutation node 82 be connected, the port of export of the 4th check valve 24 simultaneously with the 61st pipeline 61 and the port of export of the 5th check valve 25 It is connected, the arrival end of the 5th check valve 25 is connected with the first four-way valve 70 first commutation node 72.

4th check valve 24, connected mode of the 5th check valve 25 in system shown in Figure 6 are also applied for the reality of the present invention Apply scheme shown in the Fig. 5 of example 4.

The operation of air conditioning systems can equally be well implemented as user's heat supply in annual running.During work, the first heat exchange Device 3, the 3rd heat exchanger 8 are all heat source side heat exchangers, and as evaporator, heat is absorbed from environment；Second heat exchanger 4 is user Side heat exchanger, is user's heat supply, for example as condenser：Production and living hot water.

Workflow difference under each function is as described below.

(1) heat-production functions

Its workflow is：Refrigerant sequentially passes through the 62nd pipeline after the discharge of the port of export of the first compression mechanism 1 62nd, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 first commutation node 82, the 51st pipeline the 51, the 4th are unidirectional The arrival end of valve 24, the port of export of the 4th check valve 24, the 61st pipeline 61, the second heat exchanger 4, the 3rd check valve the 23, the 50th Two pipelines 52, the 58th pipeline 58, the 3rd throttle mechanism 7, the 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 Second commutation node 84, the low pressure node 83 of the second four-way valve 80, the 65th pipeline 65, the 63rd pipeline 63, return to first The arrival end of compression mechanism 1, is compressed into the first compression mechanism 1, completes one cycle.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, sequentially pass through the 60th pipeline 60, It is the high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 first commutation node 72, the arrival end of the 5th check valve 25, the 5th unidirectional The port of export of valve 25, the 61st pipeline 61, the second heat exchanger 4, the 3rd check valve 23, the 52nd pipeline the 52, the 58th pipe Road 58, first throttle mechanism 5, First Heat Exchanger 3, the 64th pipeline 64, the first four-way valve 70 second commutation node 74, first The low pressure node 73 of four-way valve 70, the 65th pipeline 65, the 68th pipeline 68, return to the arrival end of the second compression mechanism 2, enter Second compression mechanism 2 is compressed, and completes one cycle.

Its workflow is：Refrigerant into the 65th pipeline 65 is divided into two-way；The first via passes through the 68th After pipeline 68, compressed into the second compression mechanism 2, after the discharge of the port of export of the second compression mechanism 2, sequentially pass through the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 first commutation node 72, the arrival end of the 5th check valve 25, the The port of export of five check valve 25, into the 61st pipeline 61；Second tunnel is after the 63rd pipeline 63, into the first compressor Structure 1 is compressed, and after the discharge of the port of export of the first compression mechanism 1, sequentially passes through the 62nd pipeline 62, the high pressure of the second four-way valve 80 It is node 81, the second four-way valve 80 first commutation node 82, the 51st pipeline 51, the arrival end of the 4th check valve 24, the 4th unidirectional The port of export of valve 24, also into the 61st pipeline 61；Two-way sequentially passes through the second heat exchanger after the mixing of the 61st pipeline 61 4th, the 3rd check valve 23, the 52nd pipeline 52, are divided into two-way into the 58th pipeline 58；The first via sequentially passes through the 3rd Throttle mechanism 7, the 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 second commutation node 84, the second four-way valve 80 Low pressure node 83, into the 65th pipeline 65；Second tunnel sequentially passes through first throttle mechanism 5, First Heat Exchanger the 3, the 60th Four pipelines 64, the first four-way valve 70 second commutation node 74, the low pressure node 73 of the first four-way valve 70, also into the 65th pipeline 65；Two-way is divided into two-way again after the mixing of the 65th pipeline 65；The first via passes through the 63rd pipeline 63, is returned to the The arrival end of one compression mechanism 1；The 68th pipeline 68 is passed through on second tunnel, is returned to the arrival end of the second compression mechanism 2, so far completes One cycle.

(2) winter frost removing function

1) defrosting of First Heat Exchanger 3

During work, the standard-sized sheet of first throttle mechanism 5, the normal work of the 3rd throttle mechanism 7.The high voltage nodes 71 of first four-way valve 70 Communicated with the first four-way valve 70 second commutation node 74, the low pressure of 72 and first four-way valve of the first four-way valve 70 first commutation node 70 Node 73 is communicated.The high voltage nodes 81 of second four-way valve 80 are communicated with the second four-way valve 80 first commutation node 82, the second four-way valve 80 second commutation nodes 84 are communicated with the low pressure node 83 of the second four-way valve 80.

In this course of work, the difference with scheme shown in the Fig. 4 of embodiment 3 is：During work, due to the 4th check valve 24, The non-return effect of 5th check valve 25, during defrosting, the second heat exchanger 4 still maintains a higher pressure.

2) defrosting of the 3rd heat exchanger 8

During work, the normal work of first throttle mechanism 5, the standard-sized sheet of the 3rd throttle mechanism 7.The high voltage nodes 71 of first four-way valve 70 Communicated with the first four-way valve 70 first commutation node 72, the low pressure of 74 and first four-way valve of the first four-way valve 70 second commutation node 70 Node 73 is communicated.The high voltage nodes 81 of second four-way valve 80 are communicated with the second four-way valve 80 second commutation node 84, the second four-way valve 80 first commutation nodes 82 are communicated with the low pressure node 83 of the second four-way valve 80.

In this course of work, the difference with scheme shown in the Fig. 4 of embodiment 3 is：During work, due to the 4th check valve 24, The non-return effect of 5th check valve 25, during defrosting, the second heat exchanger 4 also maintains a higher pressure.

Scheme shown in Fig. 7 is the improvement project of scheme shown in Fig. 6, compared with scheme shown in Fig. 6, in scheme shown in Fig. 7, The 3rd check valve 23 is not provided with, the second heat exchanger 4 is directly to be connected by the 52nd pipeline 52 with the 58th pipeline 58. Scheme shown in Fig. 7 can also realize that the institute of scheme shown in Fig. 6 is functional, and workflow when realizing identical is identical.

In the scheme of the above-mentioned all embodiments of the present invention, first check valve 21, the second check valve 22, the 3rd check valve 23rd, any one check valve in the 4th check valve 24, the 5th check valve 25 can be using magnetic valve, with turn-off function Throttle mechanism is (for example：Electric expansion valve) or flow control device in any one replacement.Second flow direction control valve 42 can be with Using magnetic valve, or other flow control devices with turn-off function.

Any one in the scheme of the above-mentioned all embodiments of the present invention, in the first compression mechanism 1, the second compression mechanism 2 Or two simultaneously, can use following compressor in any one：Screw compressor, helical-lobe compressor, rolling rotor-type Compressor, sliding-vane compressor, rotary blade type compressor, centrifugal compressor, digital scroll compressor；First compression mechanism 1, second Any one or two in compression mechanism 2 it is also possible to be variable conpacitance compressor (for example：Frequency-changeable compressor, digital vortex Compressor), or constant speed compressor.

In the scheme of the above-mentioned all embodiments of the present invention, the first compression mechanism 1, the second compression mechanism 2 can also be by extremely The compressor set of few two variable conpacitance compressors composition, or by compressor set that at least two constant speed compressors are constituted；Separately Outside, the first compression mechanism 1, the second compression mechanism 2 can also be at least one variable conpacitance compressor and at least one constant speed compression The compressor set of machine composition.

In the scheme of the above-mentioned all embodiments of the present invention, in First Heat Exchanger 3, the second heat exchanger 4 or the 3rd heat exchanger 8 Any one is in addition to it can be refrigerant-air heat exchanger or refrigerant-water- to-water heat exchanger or other species are changed Hot device；During as refrigerant-water- to-water heat exchanger, volumetric heat exchanger, plate type heat exchanger, shell and tube exchanger or bushing type can be used Any one in heat exchanger.Any one in First Heat Exchanger 3, the second heat exchanger 4 or the 3rd heat exchanger 8 is used as refrigeration During agent-air heat exchanger, generally using finned heat exchanger, the fin of the finned heat exchanger is generally aluminum or aluminum alloy material Matter, copper material is also used in some special occasions.

In the scheme of the above-mentioned all embodiments of the present invention, first throttle mechanism 5, second throttle body 6, the 3rd throttle mechanism 7th, one or more, even all throttle mechanisms in the 4th throttle mechanism 9 can use the throttling with turn-off function Mechanism is (for example：Electric expansion valve) substituted.

In the scheme of the above-mentioned all embodiments of the present invention, described all pipelines are all copper pipes.

Claims

1. a kind of operation of air conditioning systems, including the first compression mechanism (1), the first four-way valve (70), the second four-way valve (80), first It is heat exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), the 3rd throttle mechanism (7), first-class To control valve (41), it is characterized in that：The operation of air conditioning systems also includes the second compression mechanism (2)；First four-way valve (70) Low pressure node (73) be connected by the 65th pipeline (65) with the low pressure node (83) of second four-way valve (80), it is described The high voltage nodes (71) of first four-way valve (70) pass sequentially through the 60th pipeline (60), the second compression mechanism (2) port of export, second Compression mechanism (2) arrival end, the 68th pipeline (68) and the low pressure node (73) and the two or four of first four-way valve (70) The 65th pipeline (65) between the low pressure node (83) of port valve (80) is connected, the high voltage nodes of second four-way valve (80) (81) the 62nd pipeline (62), the first compression mechanism (1) port of export, the first compression mechanism (1) arrival end, the 6th are passed sequentially through The low pressure node (73) and the low pressure node of the second four-way valve (80) of 13 pipelines (63) also with first four-way valve (70) (83) the 65th pipeline (65) between is connected, and the second commutation node (84) of second four-way valve (80) passes sequentially through the 67 pipelines (67), the 3rd heat exchanger (8), the 3rd throttle mechanism (7), the 58th pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), the 64th pipeline (64) are connected with the second commutation node (74) of first four-way valve (70), First commutation node (82) of second four-way valve (80) passes through the 51st pipeline (51) and first four-way valve (70) First commutation node (72) be connected, one end of second heat exchanger (4) passes sequentially through the first flow direction control valve (41), the 5th The 58th pipeline (58) between 12 pipelines (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) is connected, The other end of second heat exchanger (4) is saved by the first commutation of the 61st pipeline (61) and first four-way valve (70) The 51st pipeline (51) between point (72) and the first commutation node (82) of the second four-way valve (80) is connected.

2. operation of air conditioning systems according to claim 1, it is characterised in that first flow direction control valve (41) is by second Throttle mechanism (6) is substituted.

3. operation of air conditioning systems according to claim 1, it is characterised in that first flow direction control valve (41) is by the 3rd Check valve (23) is substituted, and the 3rd check valve (23) port of export is connected with the 52nd pipeline (52), the 3rd check valve (23) Arrival end is connected with the second heat exchanger (4).

4. operation of air conditioning systems according to claim 1, it is characterised in that set on the 51st pipeline (51) There are the 4th check valve (24) and the 5th check valve (25), the 4th check valve (24) arrival end passes through the 51st pipeline (51) Be connected with the first of the second four-way valve (80) the commutation node (82), the 4th check valve (24) port of export is while with the described 5th Check valve (25) port of export and the 61st pipeline (61) are connected, the 5th check valve (25) port of export and the second four-way valve (80) the first commutation node (82) is connected.

5. a kind of operation of air conditioning systems, including the first compression mechanism (1), the first four-way valve (70), the second four-way valve (80), first Heat exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), the 3rd throttle mechanism (7), the 4th list To valve (24) and the 5th check valve (25), it is characterized in that：The operation of air conditioning systems also includes the second compression mechanism (2)；Described The low pressure node (73) of one four-way valve (70) passes through the 65th pipeline (65) and the low pressure node of second four-way valve (80) (83) it is connected, the high voltage nodes (71) of first four-way valve (70) pass sequentially through the 60th pipeline (60), the second compression mechanism (2) port of export, the second compression mechanism (2) arrival end, the 68th pipeline (68) and the low pressure section of first four-way valve (70) The 65th pipeline (65) between point (73) and the low pressure node (83) of the second four-way valve (80) is connected, second four-way valve (80) high voltage nodes (81) pass sequentially through the 62nd pipeline (62), the first compression mechanism (1) port of export, the first compression mechanism (1) the low pressure node (73) and the second four-way valve of arrival end, the 63rd pipeline (63) also with first four-way valve (70) (80) the 65th pipeline (65) between low pressure node (83) is connected, the second commutation node of second four-way valve (80) (84) pass sequentially through the 67th pipeline (67), the 3rd heat exchanger (8), the 3rd throttle mechanism (7), the 58th pipeline (58), First throttle mechanism (5), First Heat Exchanger (3), the 64th pipeline (64) and the second commutation of first four-way valve (70) Node (74) is connected, and the first commutation node (82) of second four-way valve (80) passes sequentially through the 51st pipeline (51), the Four check valves (24) arrival end, the 4th check valve (24) port of export, the 5th check valve (25) port of export, the 5th check valve (25) enter Mouthful end is connected with the first of first four-way valve (70) node (72) that commutates, and one end of second heat exchanger (4) passes through the The 58th pipeline (58) phase between 52 pipelines (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) Even, the other end of second heat exchanger (4) by the 61st pipeline (61) and the 4th check valve (24) port of export and Pipeline between 5th check valve (25) port of export is connected.

6. the operation of air conditioning systems according to any claim in claim 1 and 5, it is characterised in that one first check valve (21) arrival end is connected with the first compression mechanism (1) port of export, the first check valve (21) port of export and the 62nd pipeline (62) it is connected, one second check valve (22) arrival end is connected with the second compression mechanism (2) port of export, second check valve (22) The port of export is connected with the 60th pipeline (60).

7. the operation of air conditioning systems according to any claim in claim 1 and 5, it is characterised in that one second flow direction control Valve (42) processed is arranged on the 65th pipeline, and the second flow direction control valve (42) one end is connected with the 63rd pipeline, and second Flow direction control valve (42) other end is connected with the 68th pipeline.

8. the operation of air conditioning systems according to any claim in claim 1 and 5, it is characterised in that described first segment Any one flowed in mechanism (5), the 3rd throttle mechanism (7) is electric expansion valve.

9. operation of air conditioning systems according to claim 2, it is characterised in that described second throttle body (6) is that electronics is swollen Swollen valve.

10. operation of air conditioning systems according to claim 7, it is characterised in that described the second flow direction control valve (42) is electricity Magnet valve.