CN104501461A

CN104501461A - Heat pump device

Info

Publication number: CN104501461A
Application number: CN201510017013.4A
Authority: CN
Inventors: 刘雄; 杨艳芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-01-06
Filing date: 2015-01-06
Publication date: 2015-04-08

Abstract

The invention discloses a heat pump device which comprises a first compression mechanism, a second compression mechanism, a first four-way valve, a second four-way valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first throttle mechanism, a second throttle mechanism, a fourth one-way valve, a fifth one-way valve and a compression mechanism communicating pipe. A high-pressure node of the second four-way valve is connected with a low-pressure node of the second four-way valve through a sixty-second pipe, the output end of the first compression mechanism, the inlet end of the first compression mechanism and a sixty-third pipe in sequence, and a second reversing node of the second four-way valve is connected with a second reversing node of the first four-way valve through a sixty-seventh pipe, the third heat exchanger, the second throttle mechanism, a fifty-eighth pipe, the first throttle mechanism, the first heat exchanger and a sixth-fourth pipe in sequence. The heat pump device is simple in structure, reliable in work, low in cost and capable of achieving heat supply and defrosting while eat absorption is carried out at the same time in an environment in winter, and oil return of the compression mechanisms is simple and reliable.

Description

Heat-pump apparatus

Technical field

The present invention relates to a kind of heat-pump apparatus, belong to refrigeration technology field.

Background technology

Present invention applicant disclosed on 06 20th, 2012, application number be 201110355046.1 patent of invention propose a kind of operation of air conditioning systems scheme, its system composition respectively as Fig. 6.

Description (that is: the description of patent of invention 201110355046.1) from this patent of invention: this operation of air conditioning systems has First Heat Exchanger 3, second heat exchanger 6, 3rd heat exchanger 8 is totally three groups of heat exchangers, wherein the 3rd heat exchanger 8 can only play the part of the role of condenser usually, and First Heat Exchanger 3, second heat exchanger 6 can play the part of the dual role of condenser and evaporimeter respectively, therefore when the 3rd heat exchanger 8 is hot-water heaters, for the production of hot water, and First Heat Exchanger 3, second heat exchanger 6 is all outdoor air heat exchanger, during for absorbing heat in air outdoor, operation of air conditioning systems shown in Fig. 6 just constitutes the air source heat pump equipment that one has two groups of outdoor heat exchangers, for the production of work such as hot water, its workflow can see description " 0036 " section of this patent of invention, this air source heat pump equipment compared with the heat-pump apparatus of regular air source advantageously: when winter works, can while utilizing the 3rd heat exchanger 8 to carry out heat supply (as produced hot water), defrost is carried out to First Heat Exchanger 3 or the second heat exchanger 6, i.e. draw heat in air outdoor, heat supply simultaneously and defrost.The course of work is in which case divided into following two kinds of situations;

1) utilize First Heat Exchanger 3 to absorb heat in air outdoor, the heat drawn, a part carries out heat supply by the 3rd heat exchanger 8, and another part carries out defrost to the second heat exchanger 6; Its workflow is see description " 0033 " section of patent of invention 201110355046.1.

2) utilize the second heat exchanger 6 to absorb heat in air outdoor, the heat drawn, a part carries out heat supply by the 3rd heat exchanger 8, and another part carries out defrost to First Heat Exchanger 3; Its workflow is see description " 0045 " section of patent of invention 201110355046.1.

But scheme shown in Fig. 6 form above-mentioned there is the air source heat pump equipment of two groups of outdoor heat exchangers time, in the course of work of heat supply and defrost at the same time, also there is following defect:

1), when compressing mechanism 1 is a constant speed compressor, in the course of work of heat supply and defrost at the same time, the condition of work of the heat exchanger of draw heat in air outdoor can be made to worsen, accelerate the process of its frosting.Because scheme shown in Fig. 6 in the winter time normal heat supply time, utilize First Heat Exchanger 3, second heat exchanger 6 simultaneously draw heat in air outdoor, the heat drawn by the 3rd heat exchanger 8 for heat supply (as produce hot water), and at the same time heat supply and defrost time, utilize First Heat Exchanger 3 or the second heat exchanger 6 draw heat in air outdoor, for heat supply and defrost; Due to less during the normal heat supply of area ratio now as the heat exchanger of draw heat in evaporimeter outdoor air, therefore when compressing mechanism 1 is a constant speed compressor, as everyone knows, in as evaporimeter outdoor air draw heat heat exchanger in, the evaporating temperature of the heat exchanger that area is less must reduce, therefore can accelerate its frosting process, its condition of work is more worsened.

2) when compressing mechanism 1 is a frequency-changeable compressor, based on above-mentioned reason, at the same time in heat supply and the defrost course of work, in order to avoid the condition of work as the heat exchanger of draw heat in evaporimeter outdoor air worsens, accelerate its frosting process, must by changing the method for compressor operating frequency, control the evaporating temperature of the heat exchanger of draw heat in air outdoor, this will inevitably cause the control system of air source heat pump equipment more complicated.

3) when the compressor bank that compressing mechanism 1 is made up of at least two constant speed compressors, in the course of work of heat supply and defrost at the same time, only open a constant speed compressor, the deterioration of the heat exchanger condition of work of draw heat in air outdoor can be avoided to a certain extent, but it is well-known equally, the compressor bank of parallel operation, must have point balancing of oil-balancing system guarantee lubricating oil between each compressor, cause the refrigerant system of air source heat pump equipment more complicated.

Similar situation, be also present in by heating and ventilating equipment limited company of Guangdong CHIGO on December 17th, 2014 obtain the authorization, the patent No. is in the utility model patent of 201420488957.0, as shown in Figure 7.In scheme shown in Fig. 7 except there is the above-described defect of scheme shown in Fig. 6, also there is following defect: because scheme employs three threeway flow direction convertings be made up of cross valve shown in Fig. 7, therefore structure is more complicated on the one hand, this threeway flow direction converting job insecurity be made up of cross valve on the other hand, fault rate is high.

Summary of the invention

The object of this invention is to provide one to be at least made up of two compressor structures, structure is simple, has heat supply simultaneously and defrosting function, and the heat-pump apparatus that the oil return of each compressor structure is simple and reliable.

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

1, a kind of heat-pump apparatus, comprise the first compressing mechanism (1), the first cross valve (70), the second cross valve (80), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), the 4th check valve (24), the 5th check valve (25), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), compressing mechanism communicating pipe (66), the high voltage nodes (81) of described second cross valve (80) is successively by the 62 pipeline (62), first compressing mechanism (1) port of export, first compressing mechanism (1) arrival end, 63 pipeline (63) is connected with the low pressure node (83) of described second cross valve (80), second commutation node (84) of described second cross valve (80) is successively by the 67 pipeline (67), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 64 pipeline (64) and second of described first cross valve (70) node (74) that commutates is connected, first commutation node (82) of described second cross valve (80) is successively by the 51 pipeline (51), 4th check valve (24) arrival end, 4th check valve (24) port of export, 5th check valve (25) port of export, 5th check valve (25) arrival end, be connected with first of described first cross valve (70) node (72) that commutates, the high voltage nodes (71) of described first cross valve (70) is successively by the 60 pipeline (60), second compressing mechanism (2) port of export, second compressing mechanism (2) arrival end, 68 pipeline (68) is connected with the low pressure node (73) of described first cross valve (70), one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), the other end of described second heat exchanger (4) is connected with the pipeline between described 4th check valve (24) port of export and the 5th check valve (25) port of export by the 61 pipeline (61), described compressing mechanism communicating pipe (66) one end is connected with the 62 pipeline (62), described compressing mechanism communicating pipe (66) other end is connected with the 60 pipeline (60).

2, a kind of heat-pump apparatus, comprise the first compressing mechanism (1), the second cross valve (80), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), the 4th check valve (24), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), compressing mechanism communicating pipe (66), the high voltage nodes (81) of described second cross valve (80) is successively by the 62 pipeline (62), first compressing mechanism (1) port of export, first compressing mechanism (1) arrival end, 63 pipeline (63) is connected with the low pressure node (83) of described second cross valve (80), second commutation node (84) of described second cross valve (80) is successively by the 67 pipeline (67), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 68 pipeline (68), second compressing mechanism (2) arrival end, second compressing mechanism (2) port of export, 60 pipeline (60), 4th check valve (24) port of export, 4th check valve (24) arrival end, 51 pipeline (51), be connected with first of described second cross valve (80) node (82) that commutates, one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), the other end of described second heat exchanger (4) is connected with described 60 pipeline (60) by the 61 pipeline (61), described compressing mechanism communicating pipe (66) one end is connected with the 62 pipeline (62), described compressing mechanism communicating pipe (66) other end is connected with the 60 pipeline (60) or the 61 pipeline (61).

3, a kind of heat-pump apparatus, comprise the first compressing mechanism (1), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), the first three-way flow to switching mechanism (90), the second three-way flow to switching mechanism (100), described first three-way flow often opens node (91) successively by the 67 pipeline (67) to switching mechanism (90), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 64 pipeline (64) is often opened node (101) with described second three-way flow to switching mechanism (100) and is connected, described second three-way flow is connected to switching mechanism (90) high voltage nodes (92) with described first three-way flow to switching mechanism (100) high voltage nodes (102) by the 51 pipeline (51), described first three-way flow passes through the 63 pipeline (63) successively to switching mechanism (90) low pressure node (93), first compressing mechanism (1) arrival end, first compressing mechanism (1) port of export, 62 pipeline (62), be connected with the 51 pipeline (51), described second three-way flow, is connected with the 51 pipeline (51) or the 62 pipeline (62) to switching mechanism (100) low pressure node (103) successively by the 68 pipeline (68), the second compressing mechanism (2) arrival end, the second compressing mechanism (2) port of export, the 60 pipeline (60), one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), and the other end of described second heat exchanger (4) is connected with any pipeline among the 51 pipeline (51), the 60 pipeline (60) or the 62 pipeline (62) three by the 61 pipeline (61).

4, a kind of heat-pump apparatus, comprise the first compressing mechanism (1), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), the first three-way flow to switching mechanism (90), the second three-way flow to switching mechanism (100), described first three-way flow often opens node (91) successively by the 67 pipeline (67) to switching mechanism (90), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 64 pipeline (64) is often opened node (101) with described second three-way flow to switching mechanism (100) and is connected, described second three-way flow is connected to switching mechanism (90) high voltage nodes (92) with described first three-way flow to switching mechanism (100) high voltage nodes (102) by the 51 pipeline (51), described second three-way flow, is connected with the 51 pipeline (51) to switching mechanism (100) low pressure node (103) successively by the 68 pipeline (68), the second compressing mechanism (2) arrival end, the second compressing mechanism (2) port of export, the 60 pipeline (60), described first three-way flow, is connected with the 60 pipeline (60) to switching mechanism (90) low pressure node (93) successively by the 63 pipeline (63), the first compressing mechanism (1) arrival end, the first compressing mechanism (1) port of export, the 62 pipeline (62), one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), and the other end of described second heat exchanger (4) is connected with any pipeline among the 51 pipeline (51), the 60 pipeline (60) or the 62 pipeline (62) three by the 61 pipeline (61).

5, a kind of heat-pump apparatus, comprise the first compressing mechanism (1), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), the first three-way flow to switching mechanism (90), described first three-way flow often opens node (91) successively by the 67 pipeline (67) to switching mechanism (90), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 68 pipeline (68), second compressing mechanism (2) arrival end, second compressing mechanism (2) port of export, 60 pipeline (60), 51 pipeline (51) is connected to switching mechanism (90) high voltage nodes (92) with described first three-way flow, described first three-way flow passes through the 63 pipeline (63) successively to switching mechanism (90) low pressure node (93), first compressing mechanism (1) arrival end, first compressing mechanism (1) port of export, 62 pipeline (62), be connected with the 51 pipeline (51) or the 60 pipeline (60), one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), and the other end of described second heat exchanger (4) is connected with any pipeline among the 51 pipeline (51), the 60 pipeline (60) or the 62 pipeline (62) three by the 61 pipeline (61).

Compared with prior art, its beneficial effect is in the present invention:

1., when running in the winter time, there is heat supply simultaneously and defrosting function;

2., in the course of work, the oil return of each compressor structure is simple and reliable;

3. overall structure is simple;

4. the present invention is applicable to industry and civilian heat-pump apparatus, is specially adapted to the occasion using air as low-temperature heat source.

Accompanying drawing explanation

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

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

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

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

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

Fig. 6 is prior art structural representation;

Fig. 7 is prior art structural representation.

Detailed description of the invention

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

Embodiment 1

As shown in Figure 1, the present embodiment is a kind of heat-pump apparatus with heat supply simultaneously and defrosting function, for there being the occasion of heat demand the whole year.Whole equipment comprises following part: the first compressing mechanism 1, second compressing mechanism 2, first cross valve 70, second cross valve 80, first throttle mechanism 5, second throttle body 7, First Heat Exchanger 3, second heat exchanger 4, the 3rd heat exchanger 8, the 4th check valve 24 and the 5th check valve 25.First throttle mechanism 5, second throttle body 7 are all electric expansion valve.

During work, First Heat Exchanger 3, the 3rd heat exchanger 8 are all heat source side heat exchangers, as evaporimeter, from surrounding air, absorb heat, during defrost in winter, and also can as condenser; Second heat exchanger 4 is hot water heat exchangers, for the production of domestic hot-water.

Workflow under each function is as described below respectively.

(1) hot water function is produced

Scheme one: the first compressing mechanism 1 does not work, and the second compressing mechanism 2 normally works; First Heat Exchanger 3, second heat exchanger 4 works, and the 3rd heat exchanger 8 does not work.

Under this scheme, First Heat Exchanger 3 is draw heat in air outdoor, and the second heat exchanger 4 is for the production of domestic hot-water.

During work, first throttle mechanism 5 normally works, and second throttle body 7 is closed.First cross valve 70 high voltage nodes 71 and the first cross valve 70 first node 72 that commutates communicates, and the first cross valve 70 second node 74 that commutates communicates with the first cross valve 70 low pressure node 73.Second cross valve 80 high voltage nodes 81 and the second cross valve 80 first node 82 that commutates communicates, and the second cross valve 80 second node 84 that commutates communicates with the second cross valve 80 low pressure node 83.

Its workflow is: cold-producing medium enters the 60 pipeline 60 and is divided into two-way after discharging from second compressing mechanism 2 port of export; The first via through first commutation of cross valve 70 high voltage nodes 71, first cross valve 70 first node 72, the 5th check valve 25 arrival end, the 5th check valve 25 port of export, enters the 61 pipeline 61 successively; Second tunnel through the 66 pipeline the 66, the 62 pipeline 62, second cross valve 80 high voltage nodes 81, second cross valve 80 first commutation node the 82, the 51 pipeline 51, the 4th check valve 24 arrival end, the 4th check valve 24 port of export, also enters the 61 pipeline 61 successively; Two-way is after the 61 pipeline 61 mixes, successively through the second heat exchanger the 4, the 52 pipeline the 52, the 58 pipeline 58, first throttle mechanism 5, First Heat Exchanger the 3, the 64 pipeline 64, first cross valve 70 second commutation node 74, first cross valve 70 low pressure node the 73, the 68 pipeline 68, get back to the second compressing mechanism 2 arrival end, enter the second compressing mechanism 2 to be compressed, complete and once circulate.

Scheme two: the first compressing mechanism 1 normally works, and the second compressing mechanism 2 does not work; First Heat Exchanger 3 does not work, and the second heat exchanger 4, the 3rd heat exchanger 8 normally work.

Under this scheme, the 3rd heat exchanger 8 is draw heat in air outdoor, and the second heat exchanger 4 is for the production of domestic hot-water.

During work, first throttle mechanism 5 closes, and second throttle body 7 normally works.

First cross valve 70 high voltage nodes 71 and the first cross valve 70 first node 72 that commutates communicates, and the first cross valve 70 second node 74 that commutates communicates with the first cross valve 70 low pressure node 73.Second cross valve 80 high voltage nodes 81 and the second cross valve 80 first node 82 that commutates communicates, and the second cross valve 80 second node 84 that commutates communicates with the second cross valve 80 low pressure node 83.

Its workflow is: cold-producing medium enters the 62 pipeline 62 and is divided into two-way after discharging from first compressing mechanism 1 port of export; The first via through the 66 commutation of pipeline the 66, the 60 pipeline 60, first cross valve 70 high voltage nodes 71, first cross valve 70 first node 72, the 5th check valve 25 arrival end, the 5th check valve 25 port of export, enters the 61 pipeline 61 successively; Second tunnel through the second cross valve 80 high voltage nodes 81, second cross valve 80 first commutation node the 82, the 51 pipeline 51, the 4th check valve 24 arrival end, the 4th check valve 24 port of export, also enters the 61 pipeline 61 successively; Two-way is after the 61 pipeline 61 mixes, successively through the second heat exchanger the 4, the 52 pipeline the 52, the 58 pipeline 58, second throttle body 7, the 3rd heat exchanger the 8, the 67 pipeline 67, second cross valve 80 second commutation node 84, second cross valve 80 low pressure node the 83, the 63 pipeline 63, get back to the first compressing mechanism 1 arrival end, enter the first compressing mechanism 1 to be compressed, complete and once circulate.

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

Under this scheme, First Heat Exchanger 3 and the 3rd heat exchanger 8 be draw heat in air outdoor, and the second heat exchanger 4 is for the production of domestic hot-water.

During work, first throttle mechanism 5, second throttle body 7 all normally work.

Its workflow is: the refrigerant liquid entering the 58 pipeline 58 is divided into two-way; The first via through second throttle body 7, the 3rd heat exchanger the 8, the 67 pipeline 67, second cross valve 80 second commutation node 84, second cross valve 80 low pressure node the 83, the 63 pipeline 63, first compressing mechanism 1 arrival end, first compressing mechanism 1 port of export, the 62 pipeline 62, second cross valve 80 high voltage nodes 81, second cross valve 80 first commutation node the 82, the 51 pipeline 51, the 4th check valve 24 arrival end, the 4th check valve 24 port of export, enters the 61 pipeline 61 successively; Second tunnel through first throttle mechanism 5, First Heat Exchanger the 3, the 64 pipeline 64, first cross valve 70 second commutation node 74, first cross valve 70 low pressure node the 73, the 68 pipeline 68, second compressing mechanism 2 arrival end, second compressing mechanism 2 port of export, the 60 commutation of pipeline 60, first cross valve 70 high voltage nodes 71, first cross valve 70 first node 72, the 5th check valve 25 arrival end, the 5th check valve 25 port of export, also enters the 61 pipeline 61 successively; Two-way, after the 61 pipeline 61 mixes, successively through the second heat exchanger the 4, the 52 pipeline 52, enters the 58 pipeline 58 and is divided into two-way, complete and once circulate.

(2) heat supply simultaneously in winter and defrost function

1) defrosting of First Heat Exchanger 3

In this kind of defrosting situation, the first compressing mechanism 1 normally works, and the second compressing mechanism 2 does not work; First Heat Exchanger 3, second heat exchanger 4, the 3rd heat exchanger 8 all normally work.

In this kind of defrosting situation, the 3rd heat exchanger 8 draw heat from surrounding air, the heat drawn, a part is used for the defrost of First Heat Exchanger 3; Another part is used for the second heat exchanger 4 productive life hot water.

During work, first throttle mechanism 5, second throttle body 7 normally work; First throttle mechanism 5 for controlling the refrigerant flow by First Heat Exchanger 3, thus controls the heat of defrost; Second throttle body 7 is for the throttling of refrigerant liquid.

During work, the first cross valve 70 high voltage nodes 71 and the first cross valve 70 second node 74 that commutates communicates, and the first cross valve 70 first node 72 that commutates communicates with the first cross valve 70 low pressure node 73.Second cross valve 80 high voltage nodes 81 and the second cross valve 80 first node 82 that commutates communicates, and the second cross valve 80 second node 84 that commutates communicates with the second cross valve 80 low pressure node 83.

Its workflow is: cold-producing medium enters the 62 pipeline 62 and is divided into two-way after discharging from first compressing mechanism 1 port of export; The first via through the 66 pipeline the 66, the 60 pipeline 60, first cross valve 70 high voltage nodes 71, first cross valve 70 second commutation node the 74, the 64 pipeline 64, First Heat Exchanger 3, first throttle mechanism 5, enters the 58 pipeline 58 successively; Second tunnel through the second cross valve 80 high voltage nodes 81, second cross valve 80 first commutation node the 82, the 51 pipeline 51, the 4th check valve 24 arrival end, the 4th check valve 24 port of export, the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline 52, also enters the 58 pipeline 58 successively; Two-way is after the 58 pipeline 58 mixes, successively through second throttle body 7, the 3rd heat exchanger the 8, the 67 pipeline 67, second cross valve 80 second commutation node 84, second cross valve 80 low pressure node the 83, the 63 pipeline 63, get back to the first compressing mechanism 1 arrival end, enter the first compressing mechanism 1 to be compressed, complete and once circulate.

The defrosting of (2) the 3rd heat exchangers 8

In this kind of defrosting situation, the second compressing mechanism 2 normally works, and the first compressing mechanism 1 does not work; First Heat Exchanger 3, second heat exchanger 4, the 3rd heat exchanger 8 all normally work.

In this kind of defrosting situation, First Heat Exchanger 3 draw heat from surrounding air, the heat drawn, a part is used for the defrost of the 3rd heat exchanger 8; Another part is used for the second heat exchanger 4 productive life hot water.

During work, first throttle mechanism 5, second throttle body 7 all normally work; Second throttle body 7 for controlling the refrigerant flow by the 3rd heat exchanger 8, thus controls the heat of defrost; First throttle mechanism 5 is for the throttling of refrigerant liquid.

During work, the first cross valve 70 high voltage nodes 71 and the first cross valve 70 first node 72 that commutates communicates, and the first cross valve 70 second node 74 that commutates communicates with the first cross valve 70 low pressure node 73.Second cross valve 80 high voltage nodes 81 and the second cross valve 80 second node 84 that commutates communicates, and the second cross valve 80 first node 82 that commutates communicates with the second cross valve 80 low pressure node 83.

Its workflow is: cold-producing medium enters the 60 pipeline 60 and is divided into two-way after discharging from second compressing mechanism 2 port of export; The first via through the first commutation of cross valve 70 high voltage nodes 71, first cross valve 70 first node 72, the 5th check valve 25 arrival end, the 5th check valve 25 port of export, the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline 52, enters the 58 pipeline 58 successively; Second tunnel through the 66 pipeline the 66, the 62 pipeline 62, second cross valve 80 high voltage nodes 81, second cross valve 80 second commutation node the 84, the 67 pipeline 67, the 3rd heat exchanger 8, second throttle body 7, also enters the 58 pipeline 58 successively; Two-way is after the 58 pipeline 58 mixes, successively through first throttle mechanism 5, First Heat Exchanger the 3, the 64 pipeline 64, first cross valve 70 second commutation node 74, first cross valve 70 low pressure node the 73, the 68 pipeline 68, get back to the second compressing mechanism 2 arrival end, enter the second compressing mechanism 2 to be compressed, complete and once circulate.

From the above-described course of work of scheme shown in Fig. 1: during work, after the lubricating oil entering the second heat exchanger 4 along with compressing mechanism exhaust enters refrigerant liquid, return two compressor structures via First Heat Exchanger 3, the 3rd heat exchanger 8 respectively along with refrigerant liquid respectively again; The capacity of compressing mechanism is large, and the refrigerant flow returning compressing mechanism via heat exchanger is also larger, corresponding adjoint that lubricants capacity also can be more; In addition, oil eliminator can be set respectively at the port of export of two compressor structures, also return line can be set respectively at the entrance end of two compressor structures, therefore can ensure that the lubricating oil entering refrigerant system along with the exhaust of two compressor structures respectively returns again every compressor structure, therefore the oil return of compressing mechanism is simple and reliable.

Embodiment 2

As shown in Figure 2, the present embodiment is also a kind of heat-pump apparatus with heat supply simultaneously and defrosting function, for there being the occasion of heat demand the whole year.The difference of scheme shown in scheme with Fig. 1 shown in Fig. 2 is: compared with scheme shown in Fig. 1, and scheme shown in Fig. 2 does not have the first cross valve 70 and the 5th check valve 25 in systems in which.During work, the 3rd heat exchanger 8 is using outdoor air as low-temperature heat source; First Heat Exchanger 3 is using surface water, underground water or soil etc. as low-temperature heat source; In the course of work, the heat drawn from above-mentioned two low-temperature heat sources, by the second heat exchanger 4 to user's heat supply (as: productive life hot water).

Workflow under each function is as described below respectively.

(1) hot water function is produced

Under this scheme, First Heat Exchanger 3 is draw heat from the environment such as surface water, underground water or soil, and the second heat exchanger 4 is for the production of domestic hot-water.

During work, first throttle mechanism 5 normally works, and second throttle body 7 is closed.Second cross valve 80 high voltage nodes 81 and the second cross valve 80 first node 82 that commutates communicates, and the second cross valve 80 second node 84 that commutates communicates with the second cross valve 80 low pressure node 83.

Its workflow is: cold-producing medium enters the 60 pipeline 60 and is divided into two-way after discharging from second compressing mechanism 2 port of export; The first via directly enters the 61 pipeline 61; Second tunnel through the 66 pipeline the 66, the 62 pipeline 62, second cross valve 80 high voltage nodes 81, second cross valve 80 first commutation node the 82, the 51 pipeline 51, the 4th check valve 24 arrival end, the 4th check valve 24 port of export, also enters the 61 pipeline 61 successively; Two-way is after the 61 pipeline 61 mixes, successively through the second heat exchanger the 4, the 52 pipeline the 52, the 58 pipeline 58, first throttle mechanism 5, First Heat Exchanger the 3, the 68 pipeline 68, get back to the second compressing mechanism 2 arrival end, enter the second compressing mechanism 2 to be compressed, complete and once circulate.

During work, first throttle mechanism 5 closes, and second throttle body 7 normally works.Second cross valve 80 high voltage nodes 81 and the second cross valve 80 first node 82 that commutates communicates, and the second cross valve 80 second node 84 that commutates communicates with the second cross valve 80 low pressure node 83.

Its workflow is: cold-producing medium enters the 62 pipeline 62 and is divided into two-way after discharging from first compressing mechanism 1 port of export; The first via through the 66 pipeline the 66, the 60 pipeline 60, enters the 61 pipeline 61 successively; Second tunnel through the second cross valve 80 high voltage nodes 81, second cross valve 80 first commutation node the 82, the 51 pipeline 51, the 4th check valve 24 arrival end, the 4th check valve 24 port of export, also enters the 61 pipeline 61 successively; Two-way is after the 61 pipeline 61 mixes, successively through the second heat exchanger the 4, the 52 pipeline the 52, the 58 pipeline 58, second throttle body 7, the 3rd heat exchanger the 8, the 67 pipeline 67, second cross valve 80 second commutation node 84, second cross valve 80 low pressure node the 83, the 63 pipeline 63, get back to the first compressing mechanism 1 arrival end, enter the first compressing mechanism 1 to be compressed, complete and once circulate.

Under this scheme, First Heat Exchanger 3 is draw heat from the environment such as surface water, underground water or soil, and the 3rd heat exchanger 8 is draw heat in air outdoor; Second heat exchanger 4 is for the production of domestic hot-water.

During work, first throttle mechanism 5, second throttle body 7 all normally work.Second cross valve 80 high voltage nodes 81 and the second cross valve 80 first node 82 that commutates communicates, and the second cross valve 80 second node 84 that commutates communicates with the second cross valve 80 low pressure node 83.

Its workflow is: the refrigerant liquid entering the 58 pipeline 58 is divided into two-way; The first via through second throttle body 7, the 3rd heat exchanger the 8, the 67 pipeline 67, second cross valve 80 second commutation node 84, second cross valve 80 low pressure node the 83, the 63 pipeline 63, first compressing mechanism 1 arrival end, first compressing mechanism 1 port of export, the 62 pipeline 62, second cross valve 80 high voltage nodes 81, second cross valve 80 first commutation node the 82, the 51 pipeline 51, the 4th check valve 24 arrival end, the 4th check valve 24 port of export, enters the 61 pipeline 61 successively; Second tunnel through first throttle mechanism 5, First Heat Exchanger the 3, the 68 pipeline 68, second compressing mechanism 2 arrival end, second compressing mechanism 2 port of export, the 60 pipeline 60, also enters the 61 pipeline 61 successively; Two-way, after the 61 pipeline 61 mixes, successively through the second heat exchanger the 4, the 52 pipeline 52, enters the 58 pipeline 58 and is divided into two-way, complete and once circulate.

(2) heat supply simultaneously in winter and defrost function

Winter, when working, due to draw heat in the 3rd heat exchanger 8 outdoor air, therefore needs regular defrosting.In this kind of defrosting situation, the second compressing mechanism 2 normally works, and the first compressing mechanism 1 does not work; First Heat Exchanger 3, second heat exchanger 4, the 3rd heat exchanger 8 all normally work.

During work, First Heat Exchanger 3 is draw heat from the environment such as surface water, underground water or soil, the heat drawn, and a part is used for the defrost of the 3rd heat exchanger 8; Another part is used for the second heat exchanger 4 productive life hot water.

During work, first throttle mechanism 5, second throttle body 7 normally work; Second throttle body 7 for controlling the refrigerant flow by the 3rd heat exchanger 8, thus controls the heat of defrost; First throttle mechanism 5 is for the throttling of refrigerant liquid.

During work, the second cross valve 80 high voltage nodes 81 and the second cross valve 80 second node 84 that commutates communicates, and the second cross valve 80 first node 82 that commutates communicates with the second cross valve 80 low pressure node 83.

Its workflow is: cold-producing medium enters the 60 pipeline 60 and is divided into two-way after discharging from second compressing mechanism 2 port of export; The first via through the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline 52, enters the 58 pipeline 58 successively; Second tunnel through the 66 pipeline the 66, the 62 pipeline 62, second cross valve 80 high voltage nodes 81, second cross valve 80 second commutation node the 84, the 67 pipeline 67, the 3rd heat exchanger 8, second throttle body 7, also enters the 58 pipeline 58 successively; Two-way, after the 58 pipeline 58 mixes, successively through first throttle mechanism 5, First Heat Exchanger the 3, the 68 pipeline 68, is got back to the second compressing mechanism 2 arrival end, is entered the second compressing mechanism 2 and compressed, complete and once circulate.

Embodiment 3

As shown in Figure 3, the present embodiment is also a kind of heat-pump apparatus with heat supply simultaneously and defrosting function, for there being the occasion of heat demand the whole year, such as: productive life hot water.Whole equipment comprises following part: the first compressing mechanism 1, second compressing mechanism 2, first three-way flow to switching mechanism 90, second three-way flow to switching mechanism 100, first throttle mechanism 5, second throttle body 7, First Heat Exchanger 3, second heat exchanger 4, the 3rd heat exchanger 8.First throttle mechanism 5, second throttle body 7 are all electric expansion valve.

First three-way flow has three connected nodes to switching mechanism 90, that is: the first three-way flow often opens node 91 to switching mechanism 90, and the first three-way flow is to switching mechanism 90 low pressure node 93, first three-way flow to switching mechanism 90 high voltage nodes 92.

Second three-way flow also has three connected nodes to switching mechanism 100, that is: the second three-way flow often opens node 101 to switching mechanism 100, and the second three-way flow is to switching mechanism 100 low pressure node 103, second three-way flow to switching mechanism 100 high voltage nodes 102.

Workflow under each function is as described below respectively.

(1) hot water function is produced

During work, first throttle mechanism 5 normally works, and second throttle body 7 is closed.First three-way flow is often opened node 91 to switching mechanism 90 and is communicated with to switching mechanism 90 low pressure node 93 with the first three-way flow.Second three-way flow is often opened node 101 to switching mechanism 100 and is communicated with to switching mechanism 100 low pressure node 103 with the second three-way flow.

Its workflow is: after cold-producing medium is discharged from second compressing mechanism 2 port of export, node 101, second three-way flow is often opened to switching mechanism 100 low pressure node the 103, the 68 pipeline 68 to switching mechanism 100 successively through the 60 pipeline the 60, the 51 pipeline the 51, the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline the 52, the 58 pipeline 58, first throttle mechanism 5, First Heat Exchanger the 3, the 64 pipeline 64, second three-way flow, get back to the second compressing mechanism 2 arrival end, enter the second compressing mechanism 2 to be compressed, complete and once circulate.

During work, first throttle mechanism 5 closes, and second throttle body 7 normally works.First three-way flow is often opened node 91 to switching mechanism 90 and is communicated with to switching mechanism 90 low pressure node 93 with the first three-way flow.Second three-way flow is often opened node 101 to switching mechanism 100 and is communicated with to switching mechanism 100 low pressure node 103 with the second three-way flow.

Its workflow is: after cold-producing medium is discharged from first compressing mechanism 1 port of export, node 91, first three-way flow is often opened to switching mechanism 90 low pressure node the 93, the 63 pipeline 63 to switching mechanism 90 successively through the 62 pipeline the 62, the 51 pipeline the 51, the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline the 52, the 58 pipeline 58, second throttle body 7, the 3rd heat exchanger the 8, the 67 pipeline 67, first three-way flow, get back to the first compressing mechanism 1 arrival end, enter the first compressing mechanism 1 to be compressed, complete and once circulate.

During work, first throttle mechanism 5, second throttle body 7 all normally work.First three-way flow is often opened node 91 to switching mechanism 90 and is communicated with to switching mechanism 90 low pressure node 93 with the first three-way flow.Second three-way flow is often opened node 101 to switching mechanism 100 and is communicated with to switching mechanism 100 low pressure node 103 with the second three-way flow.

Its workflow is: the refrigerant liquid entering the 58 pipeline 58 is divided into two-way; The first via often opens node 91, first three-way flow to switching mechanism 90 low pressure node the 93, the 63 pipeline 63, first compressing mechanism 1 arrival end, first compressing mechanism 1 port of export, the 62 pipeline 62 through second throttle body 7, the 3rd heat exchanger the 8, the 67 pipeline 67, first three-way flow to switching mechanism 90 successively, enters the 51 pipeline 51; Node 101, second three-way flow is often opened to switching mechanism 100 low pressure node the 103, the 68 pipeline 68, second compressing mechanism 2 arrival end, second compressing mechanism 2 port of export, the 60 pipeline 60 through first throttle mechanism 5, First Heat Exchanger the 3, the 64 pipeline 64, second three-way flow to switching mechanism 100 successively in second tunnel, also enters the 51 pipeline 51; Two-way after the 51 pipeline 51 mixes, more successively through the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline 52, enters the 58 pipeline 58 and is divided into two-way, complete and once circulate.

(2) heat supply simultaneously in winter and defrost function

1) defrosting of First Heat Exchanger 3

During work, the first three-way flow is often opened node 91 to switching mechanism 90 and is communicated with to switching mechanism 90 low pressure node 93 with the first three-way flow.Second three-way flow is often opened node 101 to switching mechanism 100 and is communicated with to switching mechanism 100 high voltage nodes 102 with the second three-way flow.

Its workflow is: cold-producing medium enters the 51 pipeline 51 through the 62 pipeline 62, is divided into two-way after discharging from first compressing mechanism 1 port of export; The first via often opens node the 101, the 64 pipeline 64, First Heat Exchanger 3, first throttle mechanism 5 through the second three-way flow to switching mechanism 100 high voltage nodes 102, second three-way flow to switching mechanism 100 successively, enters the 58 pipeline 58; Second tunnel through the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline 52, also enters the 58 pipeline 58 successively; Two-way is after the 58 pipeline 58 mixes, node 91, first three-way flow is often opened to switching mechanism 90 low pressure node the 93, the 63 pipeline 63 to switching mechanism 90 successively through second throttle body 7, the 3rd heat exchanger the 8, the 67 pipeline 67, first three-way flow, get back to the first compressing mechanism 1 arrival end, enter the first compressing mechanism 1 to be compressed, complete and once circulate.

The defrosting of (2) the 3rd heat exchangers 8

During work, the first three-way flow is often opened node 91 to switching mechanism 90 and is communicated with to switching mechanism 90 high voltage nodes 92 with the first three-way flow.Second three-way flow is often opened node 101 to switching mechanism 100 and is communicated with to switching mechanism 100 low pressure node 103 with the second three-way flow.

Its workflow is: cold-producing medium enters the 51 pipeline 51 through the 60 pipeline 60, is divided into two-way after discharging from second compressing mechanism 2 port of export; The first via through the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline 52, enters the 58 pipeline 58 successively; Second tunnel often opens node the 91, the 67 pipeline 67, the 3rd heat exchanger 8, second throttle body 7 through the first three-way flow to switching mechanism 90 high voltage nodes 92, first three-way flow to switching mechanism 90 successively, also enters the 58 pipeline 58; Two-way is after the 58 pipeline 58 mixes, node 101, second three-way flow is often opened to switching mechanism 100 low pressure node the 103, the 68 pipeline 68 to switching mechanism 100 successively through first throttle mechanism 5, First Heat Exchanger the 3, the 64 pipeline 64, second three-way flow, get back to the second compressing mechanism 2 arrival end, enter the second compressing mechanism 2 to be compressed, complete and once circulate.

From the above-described course of work of scheme shown in Fig. 3: during work, after the lubricating oil entering the second heat exchanger 4 along with the exhaust of compressing mechanism enters refrigerant liquid, return two compressor structures via First Heat Exchanger 3, the 3rd heat exchanger 8 respectively along with refrigerant liquid respectively again; The capacity of compressing mechanism is large, and the refrigerant flow returning compressing mechanism via heat exchanger is also larger, corresponding adjoint that lubricants capacity also can be more; In addition, oil eliminator can be set respectively at the port of export of two compressor structures, return line can be set respectively at the entrance end of two compressor structures, therefore can ensure that the lubricating oil entering refrigerant system along with the exhaust of two compressor structures respectively returns again every compressor structure.

In scheme shown in the present embodiment Fig. 3, first compressing mechanism 1 port of export is connected with the 51 pipeline 51 by the 62 pipeline 62; Second compressing mechanism 2 port of export is connected with the 51 pipeline 51 by the 60 pipeline 60; And the connected mode of the second heat exchanger 4 is: second heat exchanger 4 one end is connected with the 58 pipeline 58 between first throttle mechanism 5 and second throttle body 7 by the 52 pipeline 52, the other end of the second heat exchanger 4 is by the 61 pipeline the 61 and the 51 pipeline 51; But when practical application, total following connection scheme:

1) first compressing mechanism 1 port of export is connected with the 51 pipeline 51 by the 62 pipeline 62; Second compressing mechanism 2 port of export is connected with the 51 pipeline 51 by the 60 pipeline 60; Second heat exchanger 4 one end is connected with the 58 pipeline 58 between first throttle mechanism 5 and second throttle body 7 by the 52 pipeline 52, and the other end of the second heat exchanger 4 is connected with any pipeline among the 51 pipeline the 51, the 60 pipeline the 60 or the 62 pipeline 62 three by the 61 pipeline 61.

2) first compressing mechanism 1 port of export is connected with the 51 pipeline 51 by the 62 pipeline 62; Second compressing mechanism 2 port of export is connected with the 62 pipeline 62 by the 60 pipeline 60; Second heat exchanger 4 one end is connected with the 58 pipeline 58 between first throttle mechanism 5 and second throttle body 7 by the 52 pipeline 52, and the other end of the second heat exchanger 4 is connected with any pipeline among the 51 pipeline the 51, the 60 pipeline the 60 or the 62 pipeline 62 three by the 61 pipeline 61.

3) second compressing mechanism 2 port of export is connected with the 51 pipeline 51 by the 60 pipeline 60; First compressing mechanism 1 port of export is connected with the 60 pipeline 60 by the 62 pipeline 62; Second heat exchanger 4 one end is connected with the 58 pipeline 58 between first throttle mechanism 5 and second throttle body 7 by the 52 pipeline 52, and the other end of the second heat exchanger 4 is connected with any pipeline among the 51 pipeline the 51, the 60 pipeline the 60 or the 62 pipeline 62 three by the 61 pipeline 61.

Embodiment 4

As shown in Figure 4, the present embodiment is also a kind of heat-pump apparatus with heat supply simultaneously and defrosting function, for there being the occasion of heat demand the whole year.The difference of scheme shown in scheme with Fig. 3 shown in Fig. 4 is: compared with scheme shown in Fig. 3, and scheme shown in Fig. 4 does not have the second three-way flow in systems in which to switching mechanism 100.During work, the 3rd heat exchanger 8 is using outdoor air as low-temperature heat source; First Heat Exchanger 3 is using surface water, underground water or soil etc. as low-temperature heat source; In the course of work, the heat drawn from above-mentioned two low-temperature heat sources, to user's heat supply (as: productive life hot water) in the second heat exchanger 4.

Workflow under each function is as described below respectively.

(1) hot water function is produced

During work, first throttle mechanism 5 normally works, and second throttle body 7 is closed.First three-way flow is often opened node 91 to switching mechanism 90 and is communicated with to switching mechanism 90 low pressure node 93 with the first three-way flow.

Its workflow is: after cold-producing medium is discharged from second compressing mechanism 2 port of export, successively through the 60 pipeline the 60, the 51 pipeline the 51, the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline the 52, the 58 pipeline 58, first throttle mechanism 5, First Heat Exchanger the 3, the 68 pipeline 68, get back to the second compressing mechanism 2 arrival end, enter the second compressing mechanism 2 to be compressed, complete and once circulate.

During work, first throttle mechanism 5 closes, and second throttle body 7 normally works.First three-way flow is often opened node 91 to switching mechanism 90 and is communicated with to switching mechanism 90 low pressure node 93 with the first three-way flow.

During work, first throttle mechanism 5, second throttle body 7 all normally work.First three-way flow is often opened node 91 to switching mechanism 90 and is communicated with to switching mechanism 90 low pressure node 93 with the first three-way flow.

Its workflow is: the refrigerant liquid entering the 58 pipeline 58 is divided into two-way; The first via often opens node 91, first three-way flow to switching mechanism 90 low pressure node the 93, the 63 pipeline 63, first compressing mechanism 1 arrival end, first compressing mechanism 1 port of export, the 62 pipeline 62 through second throttle body 7, the 3rd heat exchanger the 8, the 67 pipeline 67, first three-way flow to switching mechanism 90 successively, enters the 51 pipeline 51; Second tunnel through first throttle mechanism 5, First Heat Exchanger the 3, the 68 pipeline 68, second compressing mechanism 2 arrival end, second compressing mechanism 2 port of export, the 60 pipeline 60, also enters the 51 pipeline 51 successively; Two-way after the 51 pipeline 51 mixes, more successively through the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline 52, enters the 58 pipeline 58 and is divided into two-way, complete and once circulate.

(2) heat supply simultaneously in winter and defrost function

During work, the first three-way flow is often opened node 91 to switching mechanism 90 and is communicated with to switching mechanism 90 high voltage nodes 92 with the first three-way flow.

Its workflow is: cold-producing medium enters the 51 pipeline 51 through the 60 pipeline 60, is divided into two-way after discharging from second compressing mechanism 2 port of export; The first via through the 61 pipeline 61, second heat exchanger the 4, the 52 pipeline 52, enters the 58 pipeline 58 successively; Second tunnel often opens node the 91, the 67 pipeline 67, the 3rd heat exchanger 8, second throttle body 7 through the first three-way flow to switching mechanism 90 high voltage nodes 92, first three-way flow to switching mechanism 90 successively, also enters the 58 pipeline 58; Two-way after the 58 pipeline 58 mixes, more successively through first throttle mechanism 5, First Heat Exchanger the 3, the 68 pipeline 68, gets back to the second compressing mechanism 2 arrival end, enters the second compressing mechanism 2 and is compressed, complete and once circulate.

In scheme shown in the present embodiment Fig. 4, first compressing mechanism 1 port of export is connected with the 51 pipeline 51 by the 62 pipeline 62; And the connected mode of the second heat exchanger 4 is: second heat exchanger 4 one end is connected with the 58 pipeline 58 between first throttle mechanism 5 and second throttle body 7 by the 52 pipeline 52, the other end of the second heat exchanger 4 is by the 61 pipeline the 61 and the 51 pipeline 51; But when practical application, total following connection scheme:

1) first compressing mechanism 1 port of export is connected with the 51 pipeline 51 by the 62 pipeline 62; Second heat exchanger 4 one end is connected with the 58 pipeline 58 between first throttle mechanism 5 and second throttle body 7 by the 52 pipeline 52, and the other end of the second heat exchanger 4 is connected with any pipeline among the 51 pipeline the 51, the 60 pipeline the 60 or the 62 pipeline 62 three by the 61 pipeline 61.

2) first compressing mechanism 1 port of export is connected with the 60 pipeline 60 by the 62 pipeline 62; Second heat exchanger 4 one end is connected with the 58 pipeline 58 between first throttle mechanism 5 and second throttle body 7 by the 52 pipeline 52, and the other end of the second heat exchanger 4 is connected with any pipeline among the 51 pipeline the 51, the 60 pipeline the 60 or the 62 pipeline 62 three by the 61 pipeline 61.

Embodiment 5

As shown in Figure 5, the present embodiment is also a kind of heat-pump apparatus with heat supply simultaneously and defrosting function, for there being the occasion of heat demand the whole year.Scheme shown in Fig. 5 is the further improvement to scheme shown in Fig. 1.

At heat-pump apparatus shown in Fig. 1 in practical work process, in order to avoid back flow of refrigerant enters compressing mechanism, a check valve can be set respectively at the exhaust outlet of the first compressing mechanism 1, second compressing mechanism 2, as shown in Figure 5; Now, the connected mode of the first check valve 21, second check valve 22 in scheme shown in Fig. 5 is: the first check valve 21 arrival end is connected with first compressing mechanism 1 port of export, and first check valve 21 port of export is connected with the 62 pipeline 62.Second check valve 22 arrival end is connected with second compressing mechanism 2 port of export, and second check valve 22 port of export is connected with the 60 pipeline 60.

As described in Example 1, in the winter course of work, when defrost is carried out to First Heat Exchanger 3, be the refrigerant flow controlling by First Heat Exchanger 3 by first throttle mechanism 5, thus control the heat of defrost, when first throttle mechanism 5 is electric expansion valves, control system of the present invention certainly will be made complicated, therefore in order to make control system of the present invention simplify, as shown in Figure 5, in parallel first capillary 31 and the 6th check valve 26 at the import and export two ends of first throttle mechanism 5; Therefore, when carrying out defrost to First Heat Exchanger 3, first throttle mechanism 5 closes, and by the refrigerant flow of the first capillary 31 restricted passage First Heat Exchanger 3, thus controls the heat of defrost, simplifies control system of the present invention.

As shown in Figure 5, now, the connected mode of the first capillary 31 and the 6th check valve 26 (that is: in heat-pump apparatus of the present invention) is in systems in which: the 6th check valve 26 port of export is connected with the 58 pipeline the 58 or the 52 pipeline 52, and the 6th check valve 26 arrival end is connected with the pipeline between first throttle mechanism 5 and First Heat Exchanger 3 by the first capillary 31.When first throttle mechanism 5 is unidirectional heating power expansion valves, also above-mentioned method can be adopted.

Similar, as described in Example 1, in the winter course of work, when defrost is carried out to the 3rd heat exchanger 8, be the refrigerant flow controlling by the 3rd heat exchanger 8 by second throttle body 7, thus control the heat of defrost, when second throttle body 7 is electric expansion valves, also control system of the present invention certainly will be made complicated, therefore as shown in Figure 5, also can second capillary 32 in parallel and the 7th check valve 27 at the import and export two ends of second throttle body 7; When carrying out defrost to the 3rd heat exchanger 8, second throttle body 7 is closed, and by the refrigerant flow of the second capillary 32 restricted passage the 3rd heat exchanger 8, thus controls the heat of defrost, simplifies control system of the present invention.

As shown in Figure 5, now, the connected mode of the second capillary 32 and the 7th check valve 27 (that is: in heat-pump apparatus of the present invention) is in systems in which: the 7th check valve 27 port of export is connected with the 58 pipeline the 58 or the 52 pipeline 52, and the 7th check valve 27 arrival end is connected with the pipeline between second throttle body 7 and the 3rd heat exchanger 8 by the second capillary 32.When first throttle mechanism 5, second throttle body 7 are unidirectional heating power expansion valves, also above-mentioned method can be adopted.

Scheme shown in Fig. 5 also can realize all functions of scheme shown in Fig. 1.Scheme shown in the present embodiment Fig. 5 is also applicable to scheme described in all embodiments of the present invention.

Embodiment 6

For scheme shown in embodiment 1 Fig. 1, by adding a liquid reservoir 50 in systems in which, can be improved further.Now, liquid reservoir 50 connected mode is in systems in which: on the 58 pipeline 58, be provided with a liquid reservoir 50, and first throttle mechanism 5 one end is connected with First Heat Exchanger 3, and first throttle mechanism 5 other end is connected with liquid reservoir 50 by the 58 pipeline 58; Second throttle body 7 one end is connected with the 3rd heat exchanger 8, and second throttle body 7 other end is also connected with liquid reservoir 50 by the 58 pipeline 58; Second heat exchanger 4 one end is connected with the 61 pipeline 61, and second heat exchanger 4 other end is connected with liquid reservoir the 50 or the 58 pipeline 58 by the 52 pipeline 52.The method of attachment in systems in which of the above-described liquid reservoir 50 of the present embodiment, is also applicable to scheme described in all embodiments of the present invention.

In the scheme of the above-mentioned all embodiments of the present invention, any one check valve in described first check valve 21, second check valve 22, the 4th check valve 24, the 5th check valve 25, the 6th check valve 26, the 7th check valve 27 can both adopt magnetic valve, any one in have the throttle mechanism of turn-off function (such as: electric expansion valve) or flow control device substitutes.

In the scheme of the above-mentioned all embodiments of the present invention, the while of any one or two in first compressing mechanism 1, second compressing mechanism 2, can adopt in following compressor any one: screw compressor, helical-lobe compressor, rolling rotor compressor, sliding-vane compressor, rotary blade type compressor, centrifugal compressor, digital scroll compressor; The while of any one or two in first compressing mechanism 1, second compressing mechanism 2, also can be variable conpacitance compressor (such as: frequency-changeable compressor, digital scroll compressor), or constant speed compressor.In the scheme of the above-mentioned all embodiments of the present invention, the compressor bank that the first compressing mechanism 1, second compressing mechanism 2 can also be made up of at least two variable conpacitance compressors, or the compressor bank be made up of at least two constant speed compressors; In addition, the first compressing mechanism 1, second compressing mechanism 2 compressor bank that also can be made up of at least one variable conpacitance compressor and at least one constant speed compressor.

In the scheme of the above-mentioned all embodiments of the present invention, any one in First Heat Exchanger 3, second heat exchanger 4 or the 3rd heat exchanger 8, except can being refrigerant-air heat exchanger, also can be the heat exchanger of cold-producing medium-water-to-water heat exchanger or other kind; During as cold-producing medium-water-to-water heat exchanger, can adopt in volumetric heat exchanger, plate type heat exchanger, shell and tube exchanger or double pipe heat exchanger any one.When any one in First Heat Exchanger 3, second heat exchanger 4 or the 3rd heat exchanger 8 is as refrigerant-air heat exchanger, usual employing finned heat exchanger, the fin of described finned heat exchanger is generally aluminum or aluminum alloy material, and the occasion special at some also uses copper material.

In the scheme of the above-mentioned all embodiments of the present invention, in first throttle mechanism 5, second throttle body 7 one, even all throttle mechanisms can both adopt the throttle mechanism (such as: electric expansion valve) with turn-off function substitute.

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

Claims

1. a heat-pump apparatus, comprise the first compressing mechanism (1), the first cross valve (70), the second cross valve (80), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), the 4th check valve (24), the 5th check valve (25), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), compressing mechanism communicating pipe (66), the high voltage nodes (81) of described second cross valve (80) is successively by the 62 pipeline (62), first compressing mechanism (1) port of export, first compressing mechanism (1) arrival end, 63 pipeline (63) is connected with the low pressure node (83) of described second cross valve (80), second commutation node (84) of described second cross valve (80) is successively by the 67 pipeline (67), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 64 pipeline (64) and second of described first cross valve (70) node (74) that commutates is connected, first commutation node (82) of described second cross valve (80) is successively by the 51 pipeline (51), 4th check valve (24) arrival end, 4th check valve (24) port of export, 5th check valve (25) port of export, 5th check valve (25) arrival end, be connected with first of described first cross valve (70) node (72) that commutates, the high voltage nodes (71) of described first cross valve (70) is successively by the 60 pipeline (60), second compressing mechanism (2) port of export, second compressing mechanism (2) arrival end, 68 pipeline (68) is connected with the low pressure node (73) of described first cross valve (70), one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), the other end of described second heat exchanger (4) is connected with the pipeline between described 4th check valve (24) port of export and the 5th check valve (25) port of export by the 61 pipeline (61), described compressing mechanism communicating pipe (66) one end is connected with the 62 pipeline (62), described compressing mechanism communicating pipe (66) other end is connected with the 60 pipeline (60).

2. a heat-pump apparatus, comprise the first compressing mechanism (1), the second cross valve (80), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), the 4th check valve (24), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), compressing mechanism communicating pipe (66), the high voltage nodes (81) of described second cross valve (80) is successively by the 62 pipeline (62), first compressing mechanism (1) port of export, first compressing mechanism (1) arrival end, 63 pipeline (63) is connected with the low pressure node (83) of described second cross valve (80), second commutation node (84) of described second cross valve (80) is successively by the 67 pipeline (67), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 68 pipeline (68), second compressing mechanism (2) arrival end, second compressing mechanism (2) port of export, 60 pipeline (60), 4th check valve (24) port of export, 4th check valve (24) arrival end, 51 pipeline (51), be connected with first of described second cross valve (80) node (82) that commutates, one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), the other end of described second heat exchanger (4) is connected with described 60 pipeline (60) by the 61 pipeline (61), described compressing mechanism communicating pipe (66) one end is connected with the 62 pipeline (62), described compressing mechanism communicating pipe (66) other end is connected with the 60 pipeline (60) or the 61 pipeline (61).

3. a heat-pump apparatus, comprise the first compressing mechanism (1), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), the first three-way flow to switching mechanism (90), the second three-way flow to switching mechanism (100), described first three-way flow often opens node (91) successively by the 67 pipeline (67) to switching mechanism (90), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 64 pipeline (64) is often opened node (101) with described second three-way flow to switching mechanism (100) and is connected, described second three-way flow is connected to switching mechanism (90) high voltage nodes (92) with described first three-way flow to switching mechanism (100) high voltage nodes (102) by the 51 pipeline (51), described first three-way flow passes through the 63 pipeline (63) successively to switching mechanism (90) low pressure node (93), first compressing mechanism (1) arrival end, first compressing mechanism (1) port of export, 62 pipeline (62), be connected with the 51 pipeline (51), described second three-way flow, is connected with the 51 pipeline (51) or the 62 pipeline (62) to switching mechanism (100) low pressure node (103) successively by the 68 pipeline (68), the second compressing mechanism (2) arrival end, the second compressing mechanism (2) port of export, the 60 pipeline (60), one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), and the other end of described second heat exchanger (4) is connected with any pipeline among the 51 pipeline (51), the 60 pipeline (60) or the 62 pipeline (62) three by the 61 pipeline (61).

4. a heat-pump apparatus, comprise the first compressing mechanism (1), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), the first three-way flow to switching mechanism (90), the second three-way flow to switching mechanism (100), described first three-way flow often opens node (91) successively by the 67 pipeline (67) to switching mechanism (90), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 64 pipeline (64) is often opened node (101) with described second three-way flow to switching mechanism (100) and is connected, described second three-way flow is connected to switching mechanism (90) high voltage nodes (92) with described first three-way flow to switching mechanism (100) high voltage nodes (102) by the 51 pipeline (51), described second three-way flow, is connected with the 51 pipeline (51) to switching mechanism (100) low pressure node (103) successively by the 68 pipeline (68), the second compressing mechanism (2) arrival end, the second compressing mechanism (2) port of export, the 60 pipeline (60), described first three-way flow, is connected with the 60 pipeline (60) to switching mechanism (90) low pressure node (93) successively by the 63 pipeline (63), the first compressing mechanism (1) arrival end, the first compressing mechanism (1) port of export, the 62 pipeline (62), one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), and the other end of described second heat exchanger (4) is connected with any pipeline among the 51 pipeline (51), the 60 pipeline (60) or the 62 pipeline (62) three by the 61 pipeline (61).

5. a heat-pump apparatus, comprise the first compressing mechanism (1), First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (8), first throttle mechanism (5), second throttle body (7), it is characterized in that: this heat-pump apparatus also comprises the second compressing mechanism (2), the first three-way flow to switching mechanism (90), described first three-way flow often opens node (91) successively by the 67 pipeline (67) to switching mechanism (90), 3rd heat exchanger (8), second throttle body (7), 58 pipeline (58), first throttle mechanism (5), First Heat Exchanger (3), 68 pipeline (68), second compressing mechanism (2) arrival end, second compressing mechanism (2) port of export, 60 pipeline (60), 51 pipeline (51) is connected to switching mechanism (90) high voltage nodes (92) with described first three-way flow, described first three-way flow passes through the 63 pipeline (63) successively to switching mechanism (90) low pressure node (93), first compressing mechanism (1) arrival end, first compressing mechanism (1) port of export, 62 pipeline (62), be connected with the 51 pipeline (51) or the 60 pipeline (60), one end of described second heat exchanger (4) is connected with the 58 pipeline (58) between described first throttle mechanism (5) and second throttle body (7) by the 52 pipeline (52), and the other end of described second heat exchanger (4) is connected with any pipeline among the 51 pipeline (51), the 60 pipeline (60) or the 62 pipeline (62) three by the 61 pipeline (61).

6. the heat-pump apparatus according to claim arbitrary in claim 1 to 5, any one that it is characterized in that in described first throttle mechanism (5), second throttle body (7) is electric expansion valve.

7. the heat-pump apparatus according to claim arbitrary in claim 1 to 5, it is characterized in that one first check valve (21) arrival end is connected with described first compressing mechanism (1) port of export, described first check valve (21) port of export is connected with the 62 pipeline (62).

8. the heat-pump apparatus according to claim arbitrary in claim 1 to 5, it is characterized in that one second check valve (22) arrival end is connected with described second compressing mechanism (2) port of export, described second check valve (22) port of export is connected with the 60 pipeline (60).

9. the heat-pump apparatus according to claim arbitrary in claim 1 to 5, it is characterized in that one the 7th check valve (27) port of export is connected with the 58 pipeline (58) or the 52 pipeline (52), described 7th check valve (27) arrival end is connected with the pipeline between described second throttle body (7) and the 3rd heat exchanger (8) by the second capillary (32).

10. according to the heat-pump apparatus in claim 1,3,4 described in arbitrary claim, it is characterized in that one the 6th check valve (26) port of export is connected with the 58 pipeline (58) or the 52 pipeline (52), described 6th check valve (26) arrival end is connected with the pipeline between described first throttle mechanism (5) and First Heat Exchanger (3) by the first capillary (31).