CN104457047B

CN104457047B - Operation of air conditioning systems

Info

Publication number: CN104457047B
Application number: CN201410736096.8A
Authority: CN
Inventors: 刘雄; 杨艳芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-29
Filing date: 2014-11-29
Publication date: 2017-11-24
Anticipated expiration: 2034-11-29
Also published as: CN104457047A

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, second throttle body, the 3rd throttle mechanism, the first check valve and the second check 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 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, cost is cheap, can realize in the process of running dual temperature cooling or (and) heat supply, be avoided that delay of the refrigerant in heat exchanger, reduce cold-producing medium stream dynamic resistance.

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 in 01 month 2013 disclosed in 02 day, the patent of invention of Application No. 201210381271.7 with And in disclosed in 25 days December in 2013, the claims 1 to 3 of the patent of invention of Application No. 201310422163.4 carries respectively A kind of operation of air conditioning systems scheme is gone out, its system forms difference as shown in Figure 4,5, 6 (i.e.：Patent of invention 201210381271.7 the Figure of description 1 to 3 with 201310422163.4).It was found from foregoing invention patent specification：Fig. 4, 5th, 6 (i.e.：The Figure of description 1 to 3 of patent of invention 201210381271.7 and 201310422163.4) scheme that is respectively shown in Available for the thermostatic and humidistatic air conditioning unit group of processing air, for the annual occasion for having refrigeration, heating and dehumidification.

It was found from Fig. 4, Fig. 5 and foregoing invention patent specification：When scheme shown in Fig. 4, Fig. 5 is in refrigerated dehumidification and sky When being worked under gas reheat function, the 3rd heat exchanger 8 uses as condenser, and for the reheating of air, and reheating amount needs to lead to Overregulate the 3rd throttle mechanism 7 to be controlled, it is well known that when the 3rd throttle mechanism 7 turns down, refrigerant circulation mistake can be increased Resistance in journey, causes compressor power consumption to increase, and on the other hand when the 3rd throttle mechanism 7 turns down, also results in a part of system Cryogen liquid holdup causes circulating mass of refrigerant to change in the 3rd heat exchanger 8, and air conditioner refrigerating can be set under serious conditions Standby normal operation adversely affects, and in order to overcome this influence, certainly will increase the charging amount of refrigerant again.

In addition, also known from Fig. 4, Fig. 5 and foregoing invention patent specification：When scheme shown in Fig. 4, Fig. 5 is independent During the three times work of scheme of refrigerating function, the second heat exchanger 4 and the 3rd heat exchanger 8 can only be entered using same evaporating temperature to air Row cooling or dehumidifying；And air can not be cooled down or dehumidified using different evaporating temperatures, i.e., in air conditioner unit, Second heat exchanger 4 is first cooled down or dehumidified to air using higher evaporating temperature, and then the 3rd heat exchanger 8 is again using relatively low Evaporating temperature air is further cooled down or dehumidified, to reach the purpose of energy-conservation.

The problem of similar, there is also it was found from foregoing invention patent specification in scheme shown in Fig. 6：When shown in Fig. 6 When scheme works under refrigerated dehumidification and air reheat function, First Heat Exchanger 3 uses as condenser, for air again Heat, and reheating amount needs to be controlled by adjusting first throttle mechanism 5, therefore, when first throttle mechanism 5 turns down, The resistance in refrigerant circulating process can be increased, cause compressor power consumption to increase, on the other hand when first throttle mechanism 5 turns down When, also result in a part of refrigerant liquid and be trapped in First Heat Exchanger 3, cause circulating mass of refrigerant to change, it is right The normal operation of operation of air conditioning systems adversely affects.Scheme shown in Fig. 6 in the work of scheme three times of separate refrigeration function, The heat exchanger 4 of First Heat Exchanger 3 and second also can only be cooled down or dehumidified to air using same evaporating temperature；And it can not use Different evaporating temperatures is cooled down or dehumidified to air, and the energy consumption for causing air to cool down or dehumidify is larger.

The content of the invention

It is an object of the invention to provide one kind can reduce compressor power consumption in the course of the work, avoid refrigerant liquid from changing Be detained in hot device, and can simultaneously using two different evaporating temperatures or (and) condensation temperature is operated, and simple in construction Operation of air conditioning systems.

The problem of in order to overcome above-mentioned technology to exist, the technical scheme that the present invention solves technical problem are：

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), second throttle body (6), Three throttle mechanisms (7), the first check valve (21) and the second check valve (22), it is characterized in that：The operation of air conditioning systems also includes the Two compression mechanisms (2)；The low pressure node (73) of first four-way valve (70) passes through the 65th pipeline (65) and described second The low pressure node (83) of four-way valve (80) is connected, and the high voltage nodes (71) of first four-way valve (70) pass sequentially through the 60th pipe Road (60), the second compression mechanism (2) port of export, the second compression mechanism (2) arrival end, the 68th pipeline (68) and described first The 65th pipeline (65) between the low pressure node (73) of four-way valve (70) and the low pressure node (83) of the second four-way valve (80) It is connected, the high voltage nodes (81) of second four-way valve (80) pass sequentially through the 62nd pipeline (62), the first compression mechanism (1) The port of export, the first compression mechanism (1) arrival end, the 63rd pipeline (63) the also low pressure node with first four-way valve (70) (73) the 65th pipeline (65) between the low pressure node (83) of the second four-way valve (80) is connected, second four-way valve Any one commutation node (84) in (80) two commutation nodes 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 pipe Road (64) is connected with any one commutation node (74) in described (70) two commutation nodes of first four-way valve, and the described 2nd 4 Another commutation node (82) of port valve (80) passes sequentially through the 66th pipeline (66), the first check valve (21) arrival end, the One check valve (21) port of export, the 69th pipeline (69) are connected with the 64th pipeline (64), first four-way valve (70) Another commutation node (72) pass sequentially through the 61st pipeline (61), the second check valve (22) arrival end, the second check valve (22) port of export, the 59th pipeline (59) are connected with the 67th pipeline (67), and one end of second heat exchanger (4) is successively By second throttle body (6), the 52nd pipeline (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) it Between the 58th pipeline (58) be connected, the other end of second heat exchanger (4) by the 51st pipeline (51) with it is described The 65th pipeline between the low pressure node (73) of first four-way valve (70) and the low pressure node (83) of the second four-way valve (80) (65) it 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), second throttle body (6), Three throttle mechanisms (7), the first check valve (21) and the second check valve (22), it is characterized in that：The operation of air conditioning systems also includes the Two compression mechanisms (2)；The low pressure node (73) of first four-way valve (70) passes through the 65th pipeline (65) and described second The low pressure node (83) of four-way valve (80) is connected, and the high voltage nodes (71) of first four-way valve (70) pass sequentially through the 60th pipe Road (60), the second compression mechanism (2) port of export, the second compression mechanism (2) arrival end, the 68th pipeline (68) and described first The 65th pipeline (65) between the low pressure node (73) of four-way valve (70) and the low pressure node (83) of the second four-way valve (80) It is connected, the high voltage nodes (81) of second four-way valve (80) pass sequentially through the 62nd pipeline (62), the first compression mechanism (1) The port of export, the first compression mechanism (1) arrival end, the 63rd pipeline (63) the also low pressure node with first four-way valve (70) (73) the 65th pipeline (65) between the low pressure node (83) of the second four-way valve (80) is connected, second four-way valve Any one commutation node (84) in (80) two commutation nodes 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 pipe Road (64) is connected with any one commutation node (74) in described (70) two commutation nodes of first four-way valve, and the described 2nd 4 Another commutation node (82) of port valve (80) passes sequentially through the 66th pipeline (66), the first check valve (21) arrival end, the One check valve (21) port of export, the 69th pipeline (69) are connected with the 64th pipeline (64), first four-way valve (70) Another commutation node (72) pass sequentially through the 61st pipeline (61), the second check valve (22) arrival end, the second check valve (22) port of export, the 59th pipeline (59) are connected with the 67th pipeline (67), and one end of second heat exchanger (4) is successively By second throttle body (6), the 52nd pipeline (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) it Between the 58th pipeline (58) be connected, the other end of second heat exchanger (4) passes through the 51st pipeline (51) and the 6th 13 pipelines (63) are connected.

3rd, 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), second throttle body (6), Three throttle mechanisms (7), the first check valve (21) and the second check valve (22), it is characterized in that：The operation of air conditioning systems also includes the Two compression mechanisms (2)；The low pressure node (73) of first four-way valve (70) passes through the 65th pipeline (65) and described second The low pressure node (83) of four-way valve (80) is connected, and the high voltage nodes (71) of first four-way valve (70) pass sequentially through the 60th pipe Road (60), the second compression mechanism (2) port of export, the second compression mechanism (2) arrival end, the 68th pipeline (68) and described first The 65th pipeline (65) between the low pressure node (73) of four-way valve (70) and the low pressure node (83) of the second four-way valve (80) It is connected, the high voltage nodes (81) of second four-way valve (80) pass sequentially through the 62nd pipeline (62), the first compression mechanism (1) The port of export, the first compression mechanism (1) arrival end, the 63rd pipeline (63) the also low pressure node with first four-way valve (70) (73) the 65th pipeline (65) between the low pressure node (83) of the second four-way valve (80) is connected, second four-way valve Any one commutation node (84) in (80) two commutation nodes 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 pipe Road (64) is connected with any one commutation node (74) in described (70) two commutation nodes of first four-way valve, and the described 2nd 4 Another commutation node (82) of port valve (80) passes sequentially through the 66th pipeline (66), the first check valve (21) arrival end, the One check valve (21) port of export, the 69th pipeline (69) are connected with the 64th pipeline (64), first four-way valve (70) Another commutation node (72) pass sequentially through the 61st pipeline (61), the second check valve (22) arrival end, the second check valve (22) port of export, the 59th pipeline (59) are connected with the 67th pipeline (67), and one end of second heat exchanger (4) is successively By second throttle body (6), the 52nd pipeline (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) it Between the 58th pipeline (58) be connected, the other end of second heat exchanger (4) passes through the 51st pipeline (51) and the 6th 18 pipelines (68) are connected.

4th, 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), second throttle body (6), Three throttle mechanisms (7) and the first check valve (21), 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 Mechanism (1) arrival end, the 63rd pipeline (63) the also low pressure node (73) and the second four-way with first four-way valve (70) The 65th pipeline (65) between the low pressure node (83) of valve (80) is connected, described (80) two commutation nodes of second four-way valve In any one commutation node (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 described first Any one commutation node (74) in the commutation nodes of four-way valve (70) two is connected, second four-way valve (80) another Commutation node (82) passes sequentially through the 66th pipeline (66), the first check valve (21) arrival end, the first check valve (21) outlet End, the 69th pipeline (69) are connected with the 64th pipeline (64), another commutation node of first four-way valve (70) (72) pass sequentially through the 61st pipeline (61), the second heat exchanger (4), second throttle body (6), the 52nd pipeline (52) with The 58th pipeline (58) between the first throttle mechanism (5) and the 3rd throttle mechanism (7) is connected.

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

1. delay of the refrigerant in heat exchanger operationally, can be avoided, compressor power consumption can be reduced；

2. can simultaneously using two different evaporating temperatures or (and) condensation temperature is operated；

It is 3. simple in construction；

4. the present invention is applied to industrial and civilian operation of air conditioning systems, especially suitable for there is different temperatures to need to cold and hot amount The occasion asked.

Brief description of the drawings

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

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

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

Fig. 4 is prior art construction schematic diagram；

Fig. 5 is prior art construction schematic diagram；

Fig. 6 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 is a kind of the temperature of air, humidity while the air conditioner refrigerating that is controlled to be set It is standby, there is the occasion of refrigeration, heating and dehumidification for whole year.Whole equipment includes consisting of part：First compression mechanism 1st, the second compression mechanism 2, the first four-way valve 70, the second four-way valve 80, first throttle mechanism 5, second throttle body 6, Section three Flow mechanism 7, First Heat Exchanger 3, the second heat exchanger 4, the 3rd heat exchanger 8, the first check valve 21 and the second check valve 22；First segment It is all electric expansion valve to flow mechanism 5, second throttle body 6, the 3rd throttle mechanism 7.

Second heat exchanger 4, the 3rd heat exchanger 8 are arranged in same air conditioner unit 10, and along the flow direction of air, 3rd heat exchanger 8 is in the downwind side of the second heat exchanger 4；There are two temperature-detecting devices, its set-up mode is：Along the stream of air Dynamic direction, the first temperature-detecting device 31 are arranged at the inlet side of the second heat exchanger 4, empty for detecting the entrance of the second heat exchanger 4 Gas dry-bulb temperature, second temperature detection means 32 are also disposed on the inlet side of the second heat exchanger 4, for detecting the second heat exchanger 4 Intake air wet-bulb temperature.Air handled by air conditioner unit 10 is indoor circulation air.

The operation of air conditioning systems is in annual running, it is possible to achieve multiple functions.During work, First Heat Exchanger 3 is Heat source side heat exchanger, summer and spring and autumn distribute caused condensation heat in refrigeration or dehumidification process as condenser, to environment, Winter as evaporator, absorbs heat, for heating air from environment；Second heat exchanger 4 is in air conditioner unit 10 Cooler, it is possible to achieve the cooling or dehumidifying of air；3rd heat exchanger 8 is heater or cooling in air conditioner unit 10 Device, during as heater, it is possible to achieve the heating of air or reheating, wind pushing temperature is controlled, during as cooler, it is possible to achieve empty The cooling or dehumidifying of gas.Workflow difference under each function is as described below.

(1) separate refrigeration function

During work, the high voltage nodes 71 of the first four-way valve 70 communicate with the first four-way valve 70 commutation node 74, the first four-way valve 70 commutation nodes 72 communicate 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 Commutation node 82 communicates, and the second four-way valve 80 commutation node 84 communicates with the low pressure node 83 of the second four-way valve 80.

Scheme one：First compression mechanism 1 does not work, the normal work of the second compression mechanism 2；In air conditioner unit 10, Second heat exchanger 4 works, and the 3rd heat exchanger 8 does not work.

Under this scheme, condensation heat caused by refrigeration all by First Heat Exchanger 3 be discharged into environment (outdoor air or Cooling water or soil etc.), air is cooled down the second heat exchanger 4 or cool-down dehumidification.

During work, the standard-sized sheet of first throttle mechanism 5, the normal work of second throttle body 6, the 3rd throttle mechanism 7 closes.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, successively by the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 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 51st pipe Road 51, the 65th pipeline 65, the 68th pipeline 68, the arrival end of the second compression mechanism 2 is returned to, into the second compression mechanism 2 Compressed, complete one cycle.

Scheme two：First compression mechanism 1 does not work, the normal work of the second compression mechanism 2；In air conditioner unit 10, Second heat exchanger 4 does not work, the normal work of the 3rd heat exchanger 8.

Under this scheme, condensation heat caused by refrigeration all by First Heat Exchanger 3 be discharged into environment (outdoor air or Cooling water or soil etc.), air is cooled down the 3rd heat exchanger 8 or cool-down dehumidification.

During work, the standard-sized sheet of first throttle mechanism 5, second throttle body 6 is closed, the normal work of the 3rd throttle mechanism 7.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, successively by the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 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 67, the second four-way valve 80 commutation nodes 84, the low pressure node 83 of the second four-way valve 80, the 65th pipeline 65, the 68th pipeline 68, return to the second pressure The arrival end of contracting mechanism 2, compressed into the second compression mechanism 2, complete one cycle.

Scheme three：First compression mechanism 1 does not work, the normal work of the second compression mechanism 2；In air conditioner unit 10, Second heat exchanger 4, the 3rd heat exchanger 8 all work.

Under this scheme, condensation heat caused by refrigeration all by First Heat Exchanger 3 be discharged into environment (outdoor air or Cooling water or soil etc.), the second heat exchanger 4, air is cooled down the 3rd heat exchanger 8 or cool-down dehumidification.

During work, the standard-sized sheet of first throttle mechanism 5, second throttle body 6, the normal work of the 3rd throttle mechanism 7.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, successively by the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 commutation node 74, the 64th pipeline 64, First Heat Exchanger 3, first Throttle mechanism 5, it is divided into two-way into the 58th pipeline 58；The first via throttles by the 52nd pipeline 52, second successively Mechanism 6, the second heat exchanger 4, the 51st pipeline 51, into the 65th pipeline 65；Second tunnel is successively by the 58th pipe Road 58, the 3rd throttle mechanism 7, the 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 commutation node 84, the second four-way The low pressure node 83 of valve 80, also into the 65th pipeline 65；Two-way is after the mixing of the 65th pipeline 65, by the 68th pipe Road 68, the arrival end of the second compression mechanism 2 is returned to, compressed into the second compression mechanism 2, complete one cycle.

Scheme four：First compression mechanism 1, the second compression mechanism 2 all normal works；In air conditioner unit 10, second Heat exchanger 4 works, and the 3rd heat exchanger 8 does not work.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64；Second tunnel After the 63rd pipeline 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively By the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 82, the 66th pipeline 66th, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way mixes in the 64th pipeline 64 Afterwards, then successively by First Heat Exchanger 3, first throttle mechanism 5, the 58th pipeline 58, the throttling of the 52nd pipeline 52, second Mechanism 6, the second heat exchanger 4, the 51st pipeline 51, are divided into two-way into the 65th pipeline 65；Enter two once more Compression mechanism is compressed, and completes one cycle.

Scheme five：First compression mechanism 1, the second compression mechanism 2 all normal works；In air conditioner unit 10, second Heat exchanger 4 does not work, the normal work of the 3rd heat exchanger 8.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64；Second tunnel After the 63rd pipeline 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively By the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 82, the 66th pipeline 66th, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way mixes in the 64th pipeline 64 Afterwards, then successively by First Heat Exchanger 3, first throttle mechanism 5, the 58th pipeline 58, the heat exchange of the 3rd throttle mechanism the 7, the 3rd Device 8, the 67th pipeline 67, the second four-way valve 80 commutation node 84, the low pressure node 83 of the second four-way valve 80, into the 65th Pipeline 65 is divided into two-way, is compressed once more into two compressor structures, completes one cycle.

Scheme six：First compression mechanism 1, the second compression mechanism 2 all normal works；In air conditioner unit 10, second Heat exchanger 4, the 3rd heat exchanger 8 also all work.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64；Second tunnel After the 63rd pipeline 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively By the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 82, the 66th pipeline 66th, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way mixes in the 64th pipeline 64 Afterwards, then successively by First Heat Exchanger 3, first throttle mechanism 5, it is divided into two-way again into the 58th pipeline 58；The first via Successively by the 52nd pipeline 52, second throttle body 6, the second heat exchanger 4, the 51st pipeline 51, into the 65th Pipeline 65；Second tunnel successively by the 58th pipeline 58, the 3rd throttle mechanism 7, the 3rd heat exchanger 8, the 67th pipeline 67, Second four-way valve 80 commutation node 84, the low pressure node 83 of the second four-way valve 80, also into the 65th pipeline 65；Two-way is the 6th After 15 pipelines 65 are mixed, it is divided into two-way once more, respectively enters two compressor structures and compressed, completes one cycle.

(2) refrigerated dehumidification and air reheat function

Under this function, the second heat exchanger 4 carries out cool-down dehumidification to air, and condensation heat caused by dehumidifying is a part of to be utilized First Heat Exchanger 3 is discharged into environment, and another part is used for the reheating of air in the 3rd heat exchanger 8.

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 compression Mechanism 1, the second compression mechanism 2 all normal works.

During work, the high voltage nodes 71 of the first four-way valve 70 communicate with the first four-way valve 70 commutation node 74, the first four-way valve 70 commutation nodes 72 communicate 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 Commutation node 84 communicates, and the second four-way valve 80 commutation node 82 communicates 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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, the 64th pipeline 64, First Heat Exchanger 3rd, first throttle mechanism 5, into the 58th pipeline 58；Second tunnel is after the 63rd pipeline 63, into the first compressor Structure 1 is compressed, after the discharge of the port of export of the first compression mechanism 1, successively by the 62nd pipeline 62, the high pressure of the second four-way valve 80 Node 81, the second four-way valve 80 commutation node 84, the 67th pipeline 67, the 3rd heat exchanger 8, the 3rd throttle mechanism 7, also enter 58th pipeline 58；Two-way is after the mixing of the 58th pipeline 58, then passes through the 52nd pipeline 52, second throttling machine successively Structure 6, the second heat exchanger 4, the 51st pipeline 51, are divided into two-way into the 65th pipeline 65；Two are respectively enterd once more Compressor structure is compressed, and completes one cycle.

In the course of work, the control strategy of the intake air dry-bulb temperature of air conditioner unit 10 is：Controller 30 is according to setting The entrance of the second heat exchanger 4 that the fixed intake air dry-bulb temperature of air conditioner unit 10 and the first temperature-detecting device 31 is detected The actual dry-bulb temperature of air, the refrigerant output flow of the first compression mechanism 1 is controlled, realized empty to the entrance of air conditioner unit 10 The control of gas dry-bulb temperature.

When the first compression mechanism 1 is frequency-changeable compressor, in the course of work, the intake air dry bulb temperature of air conditioner unit 10 The control strategy of degree is：Controller 30 is according to the intake air dry-bulb temperature of air conditioner unit 10 of setting and the first temperature detection The actual dry-bulb temperature of the intake air of the second heat exchanger 4 that device 31 is detected, the working frequency of the first compression mechanism 1 is controlled, it is real Now to the control of the intake air dry-bulb temperature of air conditioner unit 10.Specifically control process is：When the first temperature-detecting device Air conditioner unit 10 intake air dry bulb of the 31 actual dry-bulb temperatures of the intake air of the second heat exchanger 4 detected less than setting During temperature, increase the working frequency of the first compression mechanism 1；When the second heat exchanger 4 that the first temperature-detecting device 31 is detected enters When the actual dry-bulb temperature of mouth air is higher than the 10 intake air dry-bulb temperature of air conditioner unit set, reduce the first compression mechanism 1 working frequency.

In the course of work, the control strategy of the intake air wet-bulb temperature of air conditioner unit 10 is：Controller 30 is according to setting The entrance of the second heat exchanger 4 that the fixed intake air wet-bulb temperature of air conditioner unit 10 and second temperature detection means 32 are detected The actual wet-bulb temperature of air, the refrigerant output flow of the second compression mechanism 2 is controlled, realized empty to the entrance of air conditioner unit 10 The control of gas wet-bulb temperature.

When the second compression mechanism 2 is frequency-changeable compressor, in the course of work, the intake air wet bulb temperature of air conditioner unit 10 The control strategy of degree is：Controller 30 detects according to the intake air wet-bulb temperature of air conditioner unit 10 and second temperature of setting The actual wet-bulb temperature of the intake air of the second heat exchanger 4 that device 32 is detected, the working frequency of the second compression mechanism 2 is controlled, it is real Now to the control of the intake air wet-bulb temperature of air conditioner unit 10.Specifically control process is：When second temperature detection means Air conditioner unit 10 intake air wet bulb of the 32 actual wet-bulb temperature of the intake air of the second heat exchanger 4 detected less than setting During temperature, reduce the working frequency of the second compression mechanism 2；When the second heat exchanger 4 that second temperature detection means 32 is detected enters When the actual wet-bulb temperature of mouth air is higher than the 10 intake air wet-bulb temperature of air conditioner unit set, increase the second compression mechanism 2 working frequency.

(3) winter air heating function

Under this function, the draw heat from environment of First Heat Exchanger 3, the heat drawn, used in the 3rd heat exchanger 8 In the heating of air, the second heat exchanger 4 does not work.

During work, the high voltage nodes 71 of the first four-way valve 70 communicate with the first four-way valve 70 commutation node 72, the first four-way valve 70 commutation nodes 74 communicate 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 Commutation node 84 communicates, and the second four-way valve 80 commutation node 82 communicates with the low pressure node 83 of the second four-way valve 80.

Scheme one：The normal work of first compression mechanism 1, the second compression mechanism 2 do not work.

During work, the normal work of first throttle mechanism 5, second throttle body 6 is closed, the standard-sized sheet of the 3rd throttle mechanism 7.

Its workflow is：Refrigerant is after the discharge of the port of export of the first compression mechanism 1, successively by the 62nd pipeline 62nd, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 84, the 67th pipeline 67, the 3rd heat exchanger 8, 3rd throttle mechanism 7, the 58th pipeline 58, first throttle mechanism 5, First Heat Exchanger 3, the 64th pipeline the 64, the 1st Port valve 70 commutates node 74, the low pressure node 73 of the first four-way valve 70, the 65th pipeline 65, the 63rd pipeline 63, returns to the The arrival end of one compression mechanism 1, compressed into the first compression mechanism 1, complete one cycle.

Scheme two：First compression mechanism 1, the second compression mechanism 2 all normal works.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 72, the 61st pipeline 61, the second check valve 22 arrival ends, the port of export of the second check valve 22, the 59th pipeline 59, into the 67th pipeline 67；Second tunnel passes through the 6th After 13 pipelines 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively by the 6th 12 pipelines 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 84, also into the 67th pipeline 67；Two-way is managed after the mixing of the 67th pipeline 67, then successively by the 3rd heat exchanger 8, the 3rd throttle mechanism the 7, the 58th Road 58, first throttle mechanism 5, First Heat Exchanger 3, the 64th pipeline 64, the first four-way valve 70 commutation node 74, the first four-way The low pressure node 73 of valve 70, is divided into two-way into the 65th pipeline 65；Two compressor structures are respectively enterd once more to be compressed, Complete one cycle.

(4) winter dehumidifying and heating function

In this function, the draw heat from environment of First Heat Exchanger 3, the second heat exchanger 4 carries out cool-down dehumidification to air, Condensation heat caused by dehumidifying and the heat drawn from environment, the heating of air to be all used in the 3rd heat exchanger 8.

During work, first throttle mechanism 5, the normal work of second throttle body 6, the standard-sized sheet of the 3rd throttle mechanism 7.

Its workflow is：Refrigerant is after the discharge of the port of export of the first compression mechanism 1, successively by the 62nd pipeline 62nd, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 84, the 67th pipeline 67, the 3rd heat exchanger 8, 3rd throttle mechanism 7, it is divided into two-way into the 58th pipeline 58；The first via is changed by first throttle mechanism 5, first successively Hot device 3, the 64th pipeline 64, the first four-way valve 70 commutation node 74, the low pressure node 73 of the first four-way valve 70, into the 60th Five pipelines 65；Second tunnel is successively by the 52nd pipeline 52, second throttle body 6, the second heat exchanger 4, the 51st pipeline 51, also into the 65th pipeline 65；Two-way enters after the mixing of the 65th pipeline 65, then by the 63rd pipeline 63 First compression mechanism 1 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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 72, the 61st pipeline 61, the second check valve 22 arrival ends, the port of export of the second check valve 22, the 59th pipeline 59, into the 67th pipeline 67；Second tunnel passes through the 6th After 13 pipelines 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively by the 6th 12 pipelines 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 84, also into the 67th pipeline 67；Two-way is after the mixing of the 67th pipeline 67, then passes through the 3rd heat exchanger 8, the 3rd throttle mechanism 7 successively, into the 50th Eight pipelines 58 are divided into two-way again；The first via successively by first throttle mechanism 5, First Heat Exchanger 3, the 64th pipeline 64, First four-way valve 70 commutation node 74, the low pressure node 73 of the first four-way valve 70, into the 65th pipeline 65；Second tunnel passes through successively The 52nd pipeline 52, second throttle body 6, the second heat exchanger 4, the 51st pipeline 51 are crossed, also into the 65th pipeline 65；Two-way is divided into two-way, respectively enters two compressor structures again and compressed again after the mixing of the 65th pipeline 65, complete Into one cycle.

(5) winter frost removing function

Under this function, the first compression mechanism 1 does not work, the normal work of the second compression mechanism 2；In air conditioner unit 10 In, the second heat exchanger 4 works, and the 3rd heat exchanger 8 does not work；Second heat exchanger 4 is inhaled from the air in air conditioner unit 10 Heat, the heat absorbed are used for the defrosting of First Heat Exchanger 3.

During work, the standard-sized sheet of first throttle mechanism 5, the normal work of second throttle body 6, the 3rd throttle mechanism 7 closes.Its work It is identical with the scheme one of the present embodiment separate refrigeration function to make flow.

In scheme shown in Fig. 1, the connection scheme of the second heat exchanger 4 in systems is：The one end of second heat exchanger 4 leads to successively The 58th pipe crossed between second throttle body 6, the 52nd pipeline 52 and the throttle mechanism 7 of first throttle mechanism 5 and the 3rd Road 58 is connected, and the other end of the second heat exchanger 4 passes through the 51st pipeline 51 and the low pressure node 73 and the 2nd 4 of the first four-way valve 70 The 65th pipeline 65 between the low pressure node 83 of port valve 80 is connected.

In addition to such scheme, the second heat exchanger 4 also has two following connection schemes in systems：

1) one end of the second heat exchanger 4 passes sequentially through second throttle body 6, the 52nd pipeline 52 and first throttle mechanism 5 And the 3rd the 58th pipeline 58 between throttle mechanism 7 is connected, the other end of the second heat exchanger 4 by the 51st pipeline 51 with 63rd pipeline 63 is connected.

2) one end of the second heat exchanger 4 passes sequentially through second throttle body 6, the 52nd pipeline 52 and first throttle mechanism 5 And the 3rd the 58th pipeline 58 between throttle mechanism 7 is connected, the other end of the second heat exchanger 4 by the 51st pipeline 51 with 68th pipeline 68 is connected.

Embodiment 2

As shown in Fig. 2 the present embodiment is also that a kind of the temperature of air, humidity while the air conditioner refrigerating that is controlled can be set It is standby, there is the occasion of refrigeration, heating and dehumidification for whole year.The difference of scheme shown in Fig. 2 and scheme shown in Fig. 1 is：No Second check valve 22, while the connection scheme of the second heat exchanger 4 in systems is different.

Whole equipment shown in Fig. 2 includes consisting of part：First compression mechanism 1, the second compression mechanism the 2, the 1st Port valve 70, the second four-way valve 80, first throttle mechanism 5, second throttle body 6, the 3rd throttle mechanism 7, First Heat Exchanger 3, Two heat exchangers 4, the 3rd heat exchanger 8, the first check valve 21.First throttle mechanism 5, second throttle body 6, the 3rd throttle mechanism 7 All it is electric expansion valve.

The operation of air conditioning systems is in annual running, it is possible to achieve multiple functions.During work, First Heat Exchanger 3 is Heat source side heat exchanger, summer and spring and autumn distribute caused condensation heat in refrigeration or dehumidification process as condenser, to environment, Winter as evaporator, absorbs heat, for heating air from environment.

Second heat exchanger 4 is cooler or heater in air conditioner unit 10, during as cooler, summer or transition Season can realize the cooling or dehumidifying of air；During as heater, winter can realize the heating of air.

3rd heat exchanger 8 is heater or cooler in air conditioner unit 10, during as heater, it is possible to achieve empty The heating of gas or reheating, wind pushing temperature is controlled, during as cooler, it is possible to achieve the cooling or dehumidifying of air.Under each function Workflow difference is as described below.

(1) separate refrigeration function

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, successively by the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 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 61st pipe Road 61, the first four-way valve 70 commutation node 72, the low pressure node 73 of the first four-way valve 70, the 65th pipeline the 65, the 68th pipe Road 68, the arrival end of the second compression mechanism 2 is returned to, compressed into the second compression mechanism 2, complete one cycle.

Scheme two：First compression mechanism 1 does not work, the normal work of the second compression mechanism 2；In air conditioner unit 10, Second heat exchanger 4 does not work, and the 3rd heat exchanger 8 works.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, successively by the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 commutation node 74, the 64th pipeline 64, First Heat Exchanger 3, first Throttle mechanism 5, it is divided into two-way into the 58th pipeline 58；The first via throttles by the 52nd pipeline 52, second successively Mechanism 6, the second heat exchanger 4, the 61st pipeline 61, the first four-way valve 70 commutation node 72, the low pressure node of the first four-way valve 70 73, into the 65th pipeline 65；Second tunnel successively by the 58th pipeline 58, the 3rd throttle mechanism 7, the 3rd heat exchanger 8, 67th pipeline 67, the second four-way valve 80 commutation node 84, the low pressure node 83 of the second four-way valve 80, also into the 65th pipe Road 65；Two-way, by the 68th pipeline 68, returns to the arrival end of the second compression mechanism 2, entered after the mixing of the 65th pipeline 65 Enter the second compression mechanism 2 to be compressed, complete 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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64；Second tunnel After the 63rd pipeline 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively By the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 82, the 66th pipeline 66th, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way mixes in the 64th pipeline 64 Afterwards, then successively by First Heat Exchanger 3, first throttle mechanism 5, the 58th pipeline 58, the throttling of the 52nd pipeline 52, second Mechanism 6, the second heat exchanger 4, the 61st pipeline 61, the first four-way valve 70 commutation node 72, the low pressure node of the first four-way valve 70 73, it is divided into two-way into the 65th pipeline 65；Respectively enter two compressor structures once more to be compressed, completion once follows Ring.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64；Second tunnel After the 63rd pipeline 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively By the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 82, the 66th pipeline 66th, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way mixes in the 64th pipeline 64 Afterwards, then successively by First Heat Exchanger 3, first throttle mechanism 5, the 58th pipeline 58, the heat exchange of the 3rd throttle mechanism the 7, the 3rd Device 8, the 67th pipeline 67, the second four-way valve 80 commutation node 84, the low pressure node 83 of the second four-way valve 80, into the 65th Pipeline 65 is divided into two-way, respectively enters two compressor structures once more and is compressed, and completes one cycle.

Under this scheme, condensation heat caused by refrigeration all by First Heat Exchanger 3 be discharged into environment (outdoor air or Cooling water or soil etc.), the second heat exchanger 4, air is cooled down the 3rd heat exchanger 8 or cool-down dehumidification.,

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64；Second tunnel After the 63rd pipeline 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively By the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 82, the 66th pipeline 66th, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way mixes in the 64th pipeline 64 Afterwards, then successively by First Heat Exchanger 3, first throttle mechanism 5, it is divided into two-way again into the 58th pipeline 58；The first via Successively by the 52nd pipeline 52, second throttle body 6, the second heat exchanger 4, the 61st pipeline 61, the first four-way valve 70 Commutate node 72, the low pressure node 73 of the first four-way valve 70, into the 65th pipeline 65；Second tunnel is successively by the 58th pipe Road 58, the 3rd throttle mechanism 7, the 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 commutation node 84, the second four-way The low pressure node 83 of valve 80, also into the 65th pipeline 65；Two-way is distinguished once more after the 65th pipeline 65 is mixed Compressed into two compressor structures, complete one cycle.

(2) refrigerated dehumidification and air reheat function

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 compression Mechanism 1, the second compression mechanism 2 all normal works.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, the 64th pipeline 64, First Heat Exchanger 3rd, first throttle mechanism 5, into the 58th pipeline 58；Second tunnel is after the 63rd pipeline 63, into the first compressor Structure 1 is compressed, after the discharge of the port of export of the first compression mechanism 1, successively by the 62nd pipeline 62, the high pressure of the second four-way valve 80 Node 81, the second four-way valve 80 commutation node 84, the 67th pipeline 67, the 3rd heat exchanger 8, the 3rd throttle mechanism 7, also enter 58th pipeline 58；Two-way is after the mixing of the 58th pipeline 58, then passes through the 52nd pipeline 52, second throttling machine successively Structure 6, the second heat exchanger 4, the 61st pipeline 61, the first four-way valve 70 commutation node 72, the low pressure node 73 of the first four-way valve 70, It is divided into two-way into the 65th pipeline 65；Two compressor structures are respectively enterd once more to be compressed, and complete one cycle.

In the course of work, under this function, the regulation control of air conditioner unit 10 intake air dry-bulb temperature, wet-bulb temperature Method of the system strategy with embodiment 1 under this function is identical.

(3) winter air heating 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, First Heat Exchanger 3 is used for the draw heat from environment, and the second heat exchanger 4 is used to heat for air.

During work, the normal work of first throttle mechanism 5, the standard-sized sheet of second throttle body 6, the 3rd throttle mechanism 7 closes.

During work, the high voltage nodes 71 of the first four-way valve 70 communicate with the first four-way valve 70 commutation node 72, the first four-way valve 70 commutation nodes 74 communicate 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 Commutation node 82 communicates, and the second four-way valve 80 commutation node 84 communicates 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, successively by the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 commutation node 72, the 61st pipeline 61, the second heat exchanger 4, second Throttle mechanism 6, the 52nd pipeline 52, the 58th pipeline 58, first throttle mechanism 5, First Heat Exchanger the 3, the 64th are managed Road 64, the first four-way valve 70 commutation node 74, the low pressure node 73 of the first four-way valve 70, the 65th pipeline the 65, the 68th pipe Road 68, the arrival end of the second compression mechanism 2 is returned to, is compressed into the second compression mechanism 2, complete one cycle.

Scheme two：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 works.

Under this scheme, the draw heat from environment of First Heat Exchanger 3, the heat drawn, in the second heat exchanger 4, It is used for the heating of air in three heat exchangers 8.

During work, the normal work of first throttle mechanism 5, second throttle body 6, the 3rd throttle mechanism 7 all standard-sized sheets.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 72, the 61st pipeline 61, the second heat exchanger 4th, second throttle body 6, the 52nd pipeline 52, into the 58th pipeline 58；Second tunnel after the 63rd pipeline 63, Compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively by the 62nd pipeline 62, the The high voltage nodes 81 of two four-way valve 80, the second four-way valve 80 commutation node 84, the 67th pipeline 67, the 3rd heat exchanger 8, Section three Mechanism 7 is flowed, also into the 58th pipeline 58；Two-way is after the mixing of the 58th pipeline 58, then passes through first throttle machine successively Structure 5, First Heat Exchanger 3, the 64th pipeline 64, the first four-way valve 70 commutation node 74, the low pressure node 73 of the first four-way valve 70, It is divided into two-way into the 65th pipeline 65；Two compressors are respectively enterd once more to be compressed, and complete one action circulation.

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 works.

Under this scheme, the draw heat from environment of First Heat Exchanger 3, the second heat exchanger 4, the 3rd heat exchanger 8 are in difference Condensation temperature under work, heat air.I.e.：Second heat exchanger 4 is first using relatively low condensation temperature to air conditioner unit 10 Intake air heated；Then, the 3rd heat exchanger 8 is continued to from the second heat exchanger 4 using higher condensation temperature again Air heated.So as to improve the operating efficiency of the present invention, reach the purpose of energy-conservation.

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 for controlling The pressure at expulsion of first compression mechanism 1.

During work, the high voltage nodes 71 of the first four-way valve 70 communicate with the first four-way valve 70 commutation node 72, the first four-way valve 70 commutation nodes 74 communicate 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 Commutation node 84 communicates, and the second four-way valve 80 commutation node 82 communicates with the low pressure node 83 of the second four-way valve 80.Its workflow It is identical with the scheme two of the present embodiment winter heating function.

In the course of work of this programme, the first compression mechanism 1, the second compression mechanism 2 can use variable conpacitance compressor, Air themperature point of the method to the 3rd heat exchanger 8, the downwind side of the second heat exchanger 4 of refrigerant flow is exported by changing compressor It is not controlled.Specifically, when the first compression mechanism 1, the second compression mechanism 2 are frequency-changeable compressors, the second compression mechanism 2 The air dry-bulb temperature of the downwind side of the second heat exchanger 4 is controlled by the method for changing its working frequency；First compressor Structure 1 is controlled by changing the method for its working frequency to the air dry-bulb temperature of the downwind side of the 3rd heat exchanger 8.

In the course of work, the 3rd throttle mechanism 7 is used for the pressure at expulsion for controlling the first compression mechanism 1, its specific control Method is as follows：In the desired downwind side air themperature of 3rd heat exchanger 8 (i.e.：The setting value of controller setting) on the basis of, add A upper heat transfer temperature difference, as saturation temperature value corresponding to the desired pressure at expulsion of first compression mechanism 1, according to the saturation temperature Value determines 1 desired pressure at expulsion of the first compression mechanism, and during work, controller passes through the valve for adjusting the 3rd throttle mechanism 7 Aperture, it is desired value by the actual pressure at expulsion control of the first compression mechanism 1.Specifically adjusting method is：When the first compressor The actual pressure at expulsion of structure 1 is more than desired value, and when exceeding allowed band, then the valve opening of the 3rd throttle mechanism 7 of increase；When The actual pressure at expulsion of first compression mechanism 1 is less than desired value, and when exceeding allowed band, then the 3rd throttle mechanism 7 of reduction Valve opening；When the deviation between the first compression mechanism 1 actual pressure at expulsion and desired value is in allowed band, then keep The valve opening of 3rd throttle mechanism 7 is constant.

(4) winter frost removing function

Embodiment 3

As shown in figure 3, the present embodiment is a kind of operation of air conditioning systems with double evaporating temperatures and condensation temperature, for complete There are refrigeration and the occasion of heating demands in year.Whole equipment includes consisting of part：First compression mechanism 1, the second compression mechanism 2nd, the first four-way valve 70, the second four-way valve 80, first throttle mechanism 5, second throttle body 6, the 3rd throttle mechanism 7, first are changed Hot device 3, the second heat exchanger 4, the 3rd heat exchanger 8, the first check valve 21 and flow direction control valve 40；First throttle mechanism 5, second saves Flow mechanism 6, the 3rd throttle mechanism 7 is all electric expansion valve.Operation of air conditioning systems shown in the present embodiment Fig. 3 is on system composition Difference with operation of air conditioning systems shown in the Fig. 2 of embodiment 2 is：On the basis of operation of air conditioning systems shown in the Fig. 2 of embodiment 2, Fig. 3 Add a flow direction control valve 40 in shown operation of air conditioning systems, the set-up mode in the system of flow direction control valve 40 is：Stream It is arranged on to control valve 40 on the 65th pipeline 65, and the one end of flow direction control valve 40 is connected with the 63rd pipeline 63, flow direction The other end of control valve 40 is connected with the 68th pipeline 68.

During work, the First Heat Exchanger 3 in operation of air conditioning systems shown in Fig. 3 is heat source side heat exchanger, summer and spring and autumn During as condenser, caused condensation heat in process of refrigerastion is distributed to environment, winter as evaporator, absorbs heat from environment Amount, the heating for user.

Second heat exchanger 4 and the 3rd heat exchanger 8 be all user side heat exchanger, summer and spring and autumn as evaporator when, use In to user's cooling, winter as condenser, for being heated for user.

Workflow difference under each function is as described below.

(1) refrigerating function

Scheme one：First compression mechanism 1 does not work, the normal work of the second compression mechanism 2；Flow direction control valve 40 is opened；The One heat exchanger 3, the second heat exchanger 4 work, and the 3rd heat exchanger 8 does not work.

Under this scheme, condensation heat caused by refrigeration 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.

Scheme two：First compression mechanism 1 does not work, the normal work of the second compression mechanism 2；Flow direction control valve 40 is opened；The Two heat exchangers 4 do not work, and First Heat Exchanger 3, the 3rd heat exchanger 8 work.

Under this scheme, condensation heat caused by refrigeration all by First Heat Exchanger 3 be discharged into environment (outdoor air or Cooling water or soil etc.), the 3rd heat exchanger 8 freezes for user.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, successively by the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 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 67, the second four-way valve 80 commutation nodes 84, the low pressure node 83 of the second four-way valve 80, the 65th pipeline 65, flow direction control valve 40, the 68th pipeline 68, the arrival end of the second compression mechanism 2 is returned to, is compressed into the second compression mechanism 2, completes one cycle.

Scheme three：First compression mechanism 1 does not work, the normal work of the second compression mechanism 2；Flow direction control valve 40 is opened；The One heat exchanger 3, the second heat exchanger 4, the 3rd heat exchanger 8 all work.

Under this scheme, condensation heat caused by refrigeration all by First Heat Exchanger 3 be discharged into environment (outdoor air or Cooling water or soil etc.), the second heat exchanger 4, the 3rd heat exchanger 8 work under same evaporating temperature, freeze for user.

Its workflow is：Refrigerant from the port of export of the second compression mechanism 2 discharge after, successively by the 60th pipeline 60, The high voltage nodes 71 of first four-way valve 70, the first four-way valve 70 commutation node 74, the 64th pipeline 64, First Heat Exchanger 3, first Throttle mechanism 5, it is divided into two-way into the 58th pipeline 58；The first via throttles by the 52nd pipeline 52, second successively Mechanism 6, the second heat exchanger 4, the 61st pipeline 61, the first four-way valve 70 commutation node 72, the low pressure node of the first four-way valve 70 73, into the 65th pipeline 65；Second tunnel successively by the 58th pipeline 58, the 3rd throttle mechanism 7, the 3rd heat exchanger 8, 67th pipeline 67, the second four-way valve 80 commutation node 84, the low pressure node 83 of the second four-way valve 80, the 65th pipeline 65, Flow direction control valve 40, after being mixed with first via refrigerant；Pass through the 68th pipeline 68 again, return to the entrance of the second compression mechanism 2 End, is compressed into the second compression mechanism 2, completes one cycle.

Scheme four：First compression mechanism 1, the second compression mechanism 2 all normal works；Flow direction control valve 40 is opened；First changes Hot device 3, the second heat exchanger 4 work, and the 3rd heat exchanger 8 does not work.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64；Second tunnel After the 63rd pipeline 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively By the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 82, the 66th pipeline 66th, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way mixes in the 64th pipeline 64 Afterwards, then successively by First Heat Exchanger 3, first throttle mechanism 5, the 58th pipeline 58, the throttling of the 52nd pipeline 52, second Mechanism 6, the second heat exchanger 4, the 61st pipeline 61, the first four-way valve 70 commutation node 72, the low pressure node of the first four-way valve 70 73, it is divided into two-way into the 65th pipeline 65；The first via passes through the 68th pipeline 68, is returned to the second compression mechanism 2 Arrival end；Second tunnel by flow direction control valve 40, the 63rd pipeline 63, is returned to the arrival end of the first compression mechanism 1 successively；Again The secondary two compressor structures that respectively enter are compressed, and complete one cycle.

Scheme five：First compression mechanism 1, the second compression mechanism 2 all normal works；Flow direction control valve 40 is opened；Second changes Hot device 4 does not work, First Heat Exchanger 3, the normal work of the 3rd heat exchanger 8.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64；Second tunnel After the 63rd pipeline 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively By the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 82, the 66th pipeline 66th, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way mixes in the 64th pipeline 64 Afterwards, then successively by First Heat Exchanger 3, first throttle mechanism 5, the 58th pipeline 58, the heat exchange of the 3rd throttle mechanism the 7, the 3rd Device 8, the 67th pipeline 67, the second four-way valve 80 commutation node 84, the low pressure node 83 of the second four-way valve 80, into the 65th Pipeline 65 is divided into two-way；The first via by flow direction control valve 40, the 68th pipeline 68, is returned to the second compression mechanism successively 2 arrival ends；The 63rd pipeline 63 is passed through on second tunnel, is returned to the arrival end of the first compression mechanism 1；It is again introduced into two compressors Structure is compressed, and completes one cycle.

Scheme six：First compression mechanism 1, the second compression mechanism 2 all normal works；Flow direction control valve 40 is opened；First changes Hot device 3, the second heat exchanger 4, the 3rd heat exchanger 8 all work.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64；Second tunnel After the 63rd pipeline 63, compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively By the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node 82, the 66th pipeline 66th, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way mixes in the 64th pipeline 64 Afterwards, then successively by First Heat Exchanger 3, first throttle mechanism 5, it is divided into two-way again into the 58th pipeline 58；The first via Successively by the 52nd pipeline 52, second throttle body 6, the second heat exchanger 4, the 61st pipeline 61, the first four-way valve 70 Commutate node 72, the low pressure node 73 of the first four-way valve 70, into the 65th pipeline 65；Second tunnel is successively by the 58th pipe Road 58, the 3rd throttle mechanism 7, the 3rd heat exchanger 8, the 67th pipeline 67, the second four-way valve 80 commutation node 84, the second four-way The low pressure node 83 of valve 80, also into the 65th pipeline 65；After being mixed in the 65th pipeline 65 via flow direction control valve 40, It is divided into two-way once more, the first via passes through the 68th pipeline 68, is returned to the arrival end of the second compression mechanism 2；Second tunnel passes through The 63rd pipeline 63 is crossed, is returned to the arrival end of the first compression mechanism 1；It is again introduced into two compressor structures to be compressed, completes one Secondary circulation.

Scheme seven：First compression mechanism 1, the second compression mechanism 2 all normal works；Flow direction control valve 40 is closed；First changes Hot device 3, the second heat exchanger 4, the 3rd heat exchanger 8 all work.

Under this scheme, condensation heat caused by refrigeration all by First Heat Exchanger 3 be discharged into environment (outdoor air or Cooling water or soil etc.), the second heat exchanger 4, the 3rd heat exchanger 8 work under different evaporating temperatures, freeze for user；Example Such as：In the air-conditioning system of independent temperature-humidity control, the second heat exchanger 4 is used to produce high temperature chilled water, for meeting air-conditioned room Between sensible heat demand, the 3rd heat exchanger 8 be used for produce low temperature chilled water, for meeting the dehumidification of fresh air.

Its workflow is：Flow direction control valve 40 is closed during due to work, via the low pressure node 73 of the first four-way valve 70, the The low pressure node 83 of two four-way valve 80 enters the refrigerant of the 65th pipeline 65, is divided into independent two-way；The first via is by the After 68 pipelines 68, compressed into the second compression mechanism 2, after the discharge of the port of export of the second compression mechanism 2, successively by the 60 pipelines 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 74, into the 64th pipeline 64； Second tunnel is compressed after the 63rd pipeline 63 into the first compression mechanism 1, is discharged from the port of export of the first compression mechanism 1 Afterwards, successively by the 62nd pipeline 62, the high voltage nodes 81 of the second four-way valve 80, the second four-way valve 80 commutation node the 82, the 6th 16 pipelines 66, the first check valve 21, the 69th pipeline 69, also into the 64th pipeline 64；Two-way is in the 64th pipe After road 64 mixes, then it is divided into two again into the 58th pipeline 58 by First Heat Exchanger 3, first throttle mechanism 5 successively Road；The first via is successively by the 52nd pipeline 52, second throttle body 6, the second heat exchanger 4, the 61st pipeline 61, first The commutation of four-way valve 70 node 72, the low pressure node 73 of the first four-way valve 70, the 65th pipeline 65, the 68th pipeline 68, are returned again To the arrival end of the second compression mechanism 2；Second tunnel successively by the 58th pipeline 58, the 3rd throttle mechanism 7, the 3rd heat exchanger 8, 67th pipeline 67, the second four-way valve 80 commutation node 84, the low pressure node 83 of the second four-way valve 80, the 65th pipeline 65, 63rd pipeline 63, it is returned to the arrival end of the first compression mechanism 1；Two-way refrigerant respectively enters two compressor structures once more Compressed, complete one cycle.

(2) winter heating function

Under this scheme, First Heat Exchanger 3 is used for the draw heat from environment, and the second heat exchanger 4 is used to heat for user.

Scheme two：First compression mechanism 1, the second compression mechanism 2 all normal works；Flow direction control valve 40 is opened；First changes Hot device 3, the second heat exchanger 4, the 3rd heat exchanger 8 all work.

Under this scheme, the draw heat from environment of First Heat Exchanger 3, the second heat exchanger 4, the 3rd heat exchanger 8 are same Work under condensation temperature, heated for user.

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, successively by the 60th pipe Road 60, the high voltage nodes 71 of the first four-way valve 70, the first four-way valve 70 commutation node 72, the 61st pipeline 61, the second heat exchanger 4th, second throttle body 6, the 52nd pipeline 52, into the 58th pipeline 58；Second tunnel after the 63rd pipeline 63, Compressed into the first compression mechanism 1, after the discharge of the port of export of the first compression mechanism 1, successively by the 62nd pipeline 62, the The high voltage nodes 81 of two four-way valve 80, the second four-way valve 80 commutation node 84, the 67th pipeline 67, the 3rd heat exchanger 8, Section three Mechanism 7 is flowed, also into the 58th pipeline 58；Two-way is after the mixing of the 58th pipeline 58, then passes through first throttle machine successively Structure 5, First Heat Exchanger 3, the 64th pipeline 64, the first four-way valve 70 commutation node 74, the low pressure node 73 of the first four-way valve 70, It is divided into two-way into the 65th pipeline 65；The first via passes through the 68th pipeline 68, is returned to the entrance of the second compression mechanism 2 End；Second tunnel by flow direction control valve 40, the 63rd pipeline 63, is returned to the arrival end of the first compression mechanism 1 successively；Respectively again It is secondary to be compressed into two compressor structures, complete one cycle.

Scheme three：First compression mechanism 1, the second compression mechanism 2 all normal works；Flow direction control valve 40 is opened；First changes Hot device 3, the second heat exchanger 4, the 3rd heat exchanger 8 all work.

Under this scheme, the draw heat from environment of First Heat Exchanger 3, the second heat exchanger 4, the 3rd heat exchanger 8 are in difference Condensation temperature under work, for user heat.Such as：Second heat exchanger 4 is used to produce low-temperature water heating, and the 3rd heat exchanger 8 is used for Produce high-temperature-hot-water.

In the course of work of this programme, the first compression mechanism 1, the second compression mechanism 2 can use variable conpacitance compressor, The method that refrigerant flow is exported by changing compressor is respectively controlled to the temperature of height warm water.Specifically, when When first compression mechanism 1, the second compression mechanism 2 are frequency-changeable compressors, the second compression mechanism 2 is by changing the side of its working frequency The low-temperature water heating temperature that method exports to the second heat exchanger 4 is controlled；First compression mechanism 1 is by changing the side of its working frequency The high-temperature-hot-water temperature that method exports to the 3rd heat exchanger 8 is controlled.

In the course of work, the 3rd throttle mechanism 7 is used for the pressure at expulsion for controlling the first compression mechanism 1, its specific control Method is as follows：High-temperature-hot-water temperature is exported in desired 3rd heat exchanger 8 (i.e.：The setting value of controller setting) on the basis of, Plus a heat transfer temperature difference, as saturation temperature value corresponding to the desired pressure at expulsion of first compression mechanism 1, according to the saturation temperature Angle value determines 1 desired pressure at expulsion of the first compression mechanism, and during work, controller passes through the valve for adjusting the 3rd throttle mechanism 7 Door aperture, it is desired value by the actual pressure at expulsion control of the first compression mechanism 1.Specifically adjusting method is：When the first compression The actual pressure at expulsion of mechanism 1 is more than desired value, and when exceeding allowed band, then the valve opening of the 3rd throttle mechanism 7 of increase； When the actual pressure at expulsion of the first compression mechanism 1 is less than desired value, and exceedes allowed band, then reduce the 3rd throttle mechanism 7 Valve opening；When the deviation between the first compression mechanism 1 actual pressure at expulsion and desired value is in allowed band, then protect The valve opening for holding the 3rd throttle mechanism 7 is constant.

(3) winter frost removing function

Under this function, the second heat exchanger 4 absorbs heat at user, the defrost for First Heat Exchanger 3.

During work, the first compression mechanism 1 does not work, the normal work of the second compression mechanism 2；Flow direction control valve 40 is opened；The One heat exchanger 3, the second heat exchanger 4 work, and the 3rd heat exchanger 8 does not work.The standard-sized sheet of first throttle mechanism 5, second throttle body 6 is just Often work, the 3rd throttle mechanism 7 are closed.Under this function, its workflow and the phase of scheme one under the present embodiment refrigerating function Together.

Installation method of the flow direction control valve 40 in scheme shown in the Fig. 3 of embodiment 3 and effect at work are also suitable In the Fig. 1 of embodiment 1.When increasing a flow direction control valve 40 in scheme shown in the Fig. 1 of embodiment 1, now, flow direction control valve 40 Specific mounting means in scheme shown in Fig. 1 is：Flow direction control valve 40 is arranged on the 65th pipeline 65, and traffic organising The one end of valve 40 is connected with the 63rd pipeline 63, the other end of flow direction control valve 40 and the 68th pipeline 68 and the 51st pipeline 51 are connected.

For scheme shown in the Fig. 1 of embodiment 1, when it is in the six times work of scheme of separate refrigeration function, and flow direction control valve During 40 closing, as shown in figure 1, in air conditioner unit 10, difference can be respectively adopted in the second heat exchanger 4, the 3rd heat exchanger 8 Evaporating temperature be operated；I.e.：Second heat exchanger 4 is first empty to the entrance of air conditioner unit 10 using higher evaporating temperature Gas is cooled down and dehumidified；Then, the 3rd heat exchanger 8 is continued to from the second heat exchanger 4 using relatively low evaporating temperature again Air is cooled down and dehumidified.So as to improve the operating efficiency of the present invention, reach the purpose of energy-conservation.

Mounting means and method of work and effect of the flow direction control valve 40 in scheme shown in the Fig. 1 of embodiment 1 are also applied for The change programme of scheme shown in Fig. 1 described in embodiment 1.

Installation method of the flow direction control valve 40 in scheme shown in the Fig. 3 of embodiment 3 and effect at work are equally Suitable for scheme shown in the Fig. 2 of embodiment 2.Now, specific mounting means of the flow direction control valve 40 in scheme shown in Fig. 2 is：Stream It is arranged on to control valve 40 on the 65th pipeline 65, and the one end of flow direction control valve 40 is connected with the 63rd pipeline 63, flow direction The other end of control valve 40 is connected with the 68th pipeline 68.

For scheme shown in the Fig. 2 of embodiment 2, when it is in the six times work of scheme of separate refrigeration function, and flow direction control valve During 40 closing, as shown in Fig. 2 in air conditioner unit 10, different steamings is respectively adopted in the second heat exchanger 4, the 3rd heat exchanger 8 Hair temperature is operated；I.e.：Second heat exchanger 4 is first entered using higher evaporating temperature to the intake air of air conditioner unit 10 Row cooling and dehumidifying；Then, the 3rd heat exchanger 8 is continued to the air from the second heat exchanger 4 using relatively low evaporating temperature again Cooled down and dehumidified.So as to improve the operating efficiency of the present invention, reach the purpose of energy-conservation.

In addition, flow direction control valve 40 also has following mounting means in scheme shown in the Fig. 1 of embodiment 1, i.e.,：Traffic organising Valve 40 is arranged on the 65th pipeline 65, and the one end of flow direction control valve 40 and the 63rd pipeline 63 and the 51st pipeline 51 It is connected, the other end of flow direction control valve 40 is connected with the 68th pipeline 68.Under this scheme, when scheme shown in Fig. 1 is removed in the winter time Worked under wet and heating function, and when flow direction control valve 40 is closed, the first compression mechanism 1 can be by changing the side of its working frequency Method, the wet-bulb temperature of air handled by air conditioner unit 10 is controlled, the second compression mechanism 2 can be by changing its work The method of frequency, the dry-bulb temperature of air handled by air conditioner unit 10 is controlled.Refrigerant work under this scheme Make flow and scheme shown in the Fig. 1 of embodiment 1 dehumidify in the winter time and heating function under workflow it is essentially identical, unique difference It is：On the 65th pipeline 65, because flow direction control valve 40 is closed, therefore the 65th pipeline 65 be divided into it is separate Two parts.When being worked under other functions of this scheme, flow direction control valve 40 is in opening.Flow direction control valve 40 is being implemented Mounting means described above in scheme shown in the Fig. 1 of example 1, it is also applied for the change side of scheme shown in Fig. 1 described in embodiment 1 Case.

Embodiment 4

Scheme shown in the Fig. 1 of embodiment 1 has following further improvement project in actual use：Increase by one in systems Individual liquid reservoir 50.The connected mode of liquid reservoir 50 in systems is：A liquid reservoir 50 is provided with the 58th pipeline 58, the The one end of one 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 reservoir Device 50 is 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 Pipeline 58 is connected with liquid reservoir 50；The one end of second throttle body 6 is connected with the second heat exchanger 4, and the other end of second throttle body 6 leads to The 52nd pipeline 52 is crossed with the pipeline 58 of liquid reservoir 50 or the 58th to be connected.

The connection method of the above-described liquid reservoir 50 of the present embodiment in systems, suitable for all embodiments of the present invention The scheme.

On the basis of embodiment 4, all embodiments of the present invention can be made by increasing the 4th throttle mechanism 9 It is further to improve, now, the 4th throttle mechanism 9 in system (i.e.：The present invention air conditioner refrigerating it is standby) in connection method have with Lower 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.2) one end of the 4th throttle mechanism 9 is connected with liquid reservoir 50, the other end of the 4th throttle mechanism 9 and second The intermediate fill gas mouth of compression mechanism 2 is connected.3) one end of the 4th throttle mechanism 9 is connected with liquid reservoir 50, and the 4th throttle mechanism 9 is another End is connected with the 65th pipeline 65.4) one end of the 4th throttle mechanism 9 is connected with liquid reservoir 50, the other end of the 4th throttle mechanism 9 It is connected with the 63rd pipeline 63.5) one end of the 4th throttle mechanism 9 is connected with liquid reservoir 50, the other end of the 4th throttle mechanism 9 with 68th pipeline 68 is connected.

It is any one in first check valve 21, the second check valve 22 in the scheme of the above-mentioned all embodiments of the present invention Individual check valve can use magnetic valve, have turn-off function throttle mechanism (such as：Electric expansion valve) or Flow-rate adjustment machine Any one replacement in structure.Flow direction control valve 40 can use magnetic valve, or other Flow-rate adjustment machines with turn-off function Structure.

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 (such as：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 form；Separately Outside, the first compression mechanism 1, the second compression mechanism 2 can also be an at least variable conpacitance compressor and an at least 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 as refrigeration During agent-air heat exchanger, generally use 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 (such as：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 Heat exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (6), Section three Mechanism (7), the first check valve (21) and the second check valve (22) are flowed, it is characterized in that：The operation of air conditioning systems also includes the second pressure Contracting mechanism (2)；The low pressure node (73) of first four-way valve (70) passes through the 65th pipeline (65) and second four-way The low pressure node (83) of valve (80) 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) and the described 1st The 65th pipeline (65) phase between the low pressure node (73) of port valve (70) and the low pressure node (83) of the second four-way valve (80) Even, the high voltage nodes (81) of second four-way valve (80) pass sequentially through the 62nd pipeline (62), the first compression mechanism (1) goes out Mouthful end, the first compression mechanism (1) arrival end, the 63rd pipeline (63) the also low pressure node with first four-way valve (70) (73) the 65th pipeline (65) between the low pressure node (83) of the second four-way valve (80) is connected, second four-way valve Any one commutation node (84) in (80) two commutation nodes 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 pipe Road (64) is connected with any one commutation node (74) in described (70) two commutation nodes of first four-way valve, and the described 2nd 4 Another commutation node (82) of port valve (80) passes sequentially through the 66th pipeline (66), the first check valve (21) arrival end, the One check valve (21) port of export, the 69th pipeline (69) are connected with the 64th pipeline (64), first four-way valve (70) Another commutation node (72) pass sequentially through the 61st pipeline (61), the second check valve (22) arrival end, the second check valve (22) port of export, the 59th pipeline (59) are connected with the 67th pipeline (67), and one end of second heat exchanger (4) is successively By second throttle body (6), the 52nd pipeline (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) it Between the 58th pipeline (58) be connected, the other end of second heat exchanger (4) by the 51st pipeline (51) with it is described The 65th pipeline between the low pressure node (73) of first four-way valve (70) and the low pressure node (83) of the second four-way valve (80) (65) it is connected.

2. 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), second throttle body (6), Section three Mechanism (7), the first check valve (21) and the second check valve (22) are flowed, it is characterized in that：The operation of air conditioning systems also includes the second pressure Contracting mechanism (2)；The low pressure node (73) of first four-way valve (70) passes through the 65th pipeline (65) and second four-way The low pressure node (83) of valve (80) 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) and the described 1st The 65th pipeline (65) phase between the low pressure node (73) of port valve (70) and the low pressure node (83) of the second four-way valve (80) Even, the high voltage nodes (81) of second four-way valve (80) pass sequentially through the 62nd pipeline (62), the first compression mechanism (1) goes out Mouthful end, the first compression mechanism (1) arrival end, the 63rd pipeline (63) the also low pressure node with first four-way valve (70) (73) the 65th pipeline (65) between the low pressure node (83) of the second four-way valve (80) is connected, second four-way valve Any one commutation node (84) in (80) two commutation nodes 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 pipe Road (64) is connected with any one commutation node (74) in described (70) two commutation nodes of first four-way valve, and the described 2nd 4 Another commutation node (82) of port valve (80) passes sequentially through the 66th pipeline (66), the first check valve (21) arrival end, the One check valve (21) port of export, the 69th pipeline (69) are connected with the 64th pipeline (64), first four-way valve (70) Another commutation node (72) pass sequentially through the 61st pipeline (61), the second check valve (22) arrival end, the second check valve (22) port of export, the 59th pipeline (59) are connected with the 67th pipeline (67), and one end of second heat exchanger (4) is successively By second throttle body (6), the 52nd pipeline (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) it Between the 58th pipeline (58) be connected, the other end of second heat exchanger (4) passes through the 51st pipeline (51) and the 6th 13 pipelines (63) are connected.

3. 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), second throttle body (6), Section three Mechanism (7), the first check valve (21) and the second check valve (22) are flowed, it is characterized in that：The operation of air conditioning systems also includes the second pressure Contracting mechanism (2)；The low pressure node (73) of first four-way valve (70) passes through the 65th pipeline (65) and second four-way The low pressure node (83) of valve (80) 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) and the described 1st The 65th pipeline (65) phase between the low pressure node (73) of port valve (70) and the low pressure node (83) of the second four-way valve (80) Even, the high voltage nodes (81) of second four-way valve (80) pass sequentially through the 62nd pipeline (62), the first compression mechanism (1) goes out Mouthful end, the first compression mechanism (1) arrival end, the 63rd pipeline (63) the also low pressure node with first four-way valve (70) (73) the 65th pipeline (65) between the low pressure node (83) of the second four-way valve (80) is connected, second four-way valve Any one commutation node (84) in (80) two commutation nodes 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 pipe Road (64) is connected with any one commutation node (74) in described (70) two commutation nodes of first four-way valve, and the described 2nd 4 Another commutation node (82) of port valve (80) passes sequentially through the 66th pipeline (66), the first check valve (21) arrival end, the One check valve (21) port of export, the 69th pipeline (69) are connected with the 64th pipeline (64), first four-way valve (70) Another commutation node (72) pass sequentially through the 61st pipeline (61), the second check valve (22) arrival end, the second check valve (22) port of export, the 59th pipeline (59) are connected with the 67th pipeline (67), and one end of second heat exchanger (4) is successively By second throttle body (6), the 52nd pipeline (52) and the first throttle mechanism (5) and the 3rd throttle mechanism (7) it Between the 58th pipeline (58) be connected, the other end of second heat exchanger (4) passes through the 51st pipeline (51) and the 6th 18 pipelines (68) are connected.

4. the operation of air conditioning systems according to any claim in claims 1 to 3 a, it is characterised in that flow direction control valve (40) it is arranged on the 65th pipeline (65), and the flow direction control valve (40) one end is connected with the 63rd pipeline (63), Flow direction control valve (40) other end is connected with the 68th pipeline (68) and the 51st pipeline (51).

5. the operation of air conditioning systems according to any claim in claims 1 to 3 a, it is characterised in that flow direction control valve (40) it is arranged on the 65th pipeline (65), and the flow direction control valve (40) one end and the 63rd pipeline (63) and the 5th 11 pipelines (51) are connected, and flow direction control valve (40) other end is connected with the 68th pipeline (68).

6. 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), second throttle body (6), Section three Mechanism (7) and the first check valve (21) are flowed, 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) arrival end, the 63rd pipeline (63) the also low pressure node (73) and the second four-way valve with first four-way valve (70) (80) the 65th pipeline (65) between low pressure node (83) is connected, in described (80) two commutation nodes of second four-way valve Any one commutation node (84) pass sequentially through the 67th pipeline (67), the 3rd heat exchanger (8), the 3rd throttle mechanism (7), 58th pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), the 64th pipeline (64) and first four-way Any one commutation node (74) in (70) two commutation nodes of valve is connected, another commutation of second four-way valve (80) Node (82) passes sequentially through the 66th pipeline (66), the first check valve (21) arrival end, the first check valve (21) port of export, 69 pipelines (69) are connected with the 64th pipeline (64), first four-way valve (70) another commutation node (72) according to It is secondary to pass through the 61st pipeline (61), the second heat exchanger (4), second throttle body (6), the 52nd pipeline (52) and described the The 58th pipeline (58) between one throttle mechanism (5) and the 3rd throttle mechanism (7) is connected.

7. operation of air conditioning systems according to claim 6 a, it is characterised in that flow direction control valve (40) is arranged on the 60th On five pipelines (65), and the flow direction control valve (40) one end is connected with the 63rd pipeline (63), the flow direction control valve (40) other end is connected with the 68th pipeline (68).

8. according to the operation of air conditioning systems described in any claim in claim 1,2,3,6, it is characterised in that described first Any one in compression mechanism (1) and the second compression mechanism (2) is variable conpacitance compressor.

9. operation of air conditioning systems according to claim 4, it is characterised in that described flow direction control valve (40) is magnetic valve.

10. operation of air conditioning systems according to claim 5, it is characterised in that described flow direction control valve (40) is electromagnetism Valve.

11. operation of air conditioning systems according to claim 7, it is characterised in that described flow direction control valve (40) is electromagnetism Valve.