CN102003749A - Air conditioner - Google Patents
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- CN102003749A CN102003749A CN2010102680035A CN201010268003A CN102003749A CN 102003749 A CN102003749 A CN 102003749A CN 2010102680035 A CN2010102680035 A CN 2010102680035A CN 201010268003 A CN201010268003 A CN 201010268003A CN 102003749 A CN102003749 A CN 102003749A
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Abstract
The present invention relates to an air conditioner in which a plurality of outdoor units are connected by three inter-unit pipelines, in which a part of the outdoor units is constituted inexpensively so as to reduce the price of the entire device. The air conditioner comprises a triple-pipeline type first outdoor unit 2 connected to three inter-unit pipelines 5 made up of a high-pressure gas pipe 7, a low-pressure gas pipe 6, and a fluid pipe 8 and a second outdoor unit 3 connected by two pipelines of a gas pipe 35 and a fluid pipe 36 are provided, in which a fluid pipe 36 of this second outdoor unit 3 is connected to the fluid pipe 8, while a gas pipe 35 of the second outdoor unit is selectively connected to the high-pressure gas pipe 7 or the low-pressure gas pipe 6 using a valve-element kit 50 having a four-way valve 51.
Description
Technical field
The present invention relates to a kind of conditioner, this conditioner has outdoor unit and Duo Tai indoor unit, can make many indoor units carry out cooling operation or warming operation simultaneously, perhaps mixes and implements described warming operation and cooling operation.
Background technology
Usually, known have a kind ofly outdoor unit be connected with the Duo Tai indoor unit and make described many indoor units carry out the conditioner of the liquid pipe of cooling operation or warming operation and tracheae interconnection system (below, be called two pipe arrangement formulas) by pipe arrangement between two root units that constitute by liquid pipe and tracheae.In addition, in recent years, proposition has and a kind ofly outdoor unit is connected with the Duo Tai indoor unit and makes described many indoor units carry out cooling operation or warming operation simultaneously or mix to implement described cooling operation and the conditioner (with reference to patent documentation 1) of low pressure tracheae, high-pressure air pipe and the liquid pipe interconnection system of warming operation (below, be called three pipe arrangement formulas) by pipe arrangement between three root units that are made of low pressure tracheae, high-pressure air pipe and liquid pipe.
No. 2804527 communiques of [patent documentation 1] Japan Patent
Yet, in the conditioner of three pipe arrangement formulas of this kind, there is following trend: possess many outdoor units, realize the miniaturization of each outdoor unit, and, realize the raising of the running efficiency of various operation of air conditioner according to the platform number of the outdoor unit of air-conditioning load adjustment running.
Yet, the outdoor unit that uses in the conditioner of three pipe arrangement formulas possesses compressor, outdoor heat exchanger and outdoor expansion valve usually, one end of outdoor heat exchanger is selected a ground and is connected with refrigerant suction pipe branch with the cold-producing medium bleed pipe of compressor, on this cold-producing medium bleed pipe, be connected with high-pressure air pipe, on refrigerant suction pipe, be connected with the low pressure tracheae, be connected with the liquid pipe at the other end of outdoor heat exchanger.Therefore, the outdoor unit of three pipe arrangement formulas is compared with the outdoor unit of two pipe arrangement formulas, and the structure of the equipment that pipe arrangement connects or the processing of pipe arrangement are miscellaneous, and development cost or manufacturing cost rise, therefore in the structure of the outdoor unit that possesses many three pipe arrangement formulas, there is the problem of price rising.
Summary of the invention
Therefore, the present invention proposes in order to solve above-mentioned problem, its purpose is to provide in a kind of conditioner that connects many outdoor units between three root units on the pipe arrangement, constitutes a part of outdoor unit at an easy rate and conditioner that the price of implement device integral body reduces.
To achieve these goals, the invention provides a kind of conditioner, possesses first compressor, first outdoor unit of first outdoor heat exchanger and first outdoor expansion valve is connected by pipe arrangement between the unit with many indoor units that possess indoor heat exchanger, one end of described first outdoor heat exchanger is selected a ground and is connected with refrigerant suction pipe branch with the cold-producing medium bleed pipe of first compressor, pipe arrangement comprises the high-pressure air pipe that is connected to described cold-producing medium bleed pipe between described unit, be connected to the low pressure tracheae of described refrigerant suction pipe, be connected to the liquid pipe of the other end of described first outdoor heat exchanger, one end of indoor heat exchanger is selected a ground and described high-pressure air pipe and is connected with described low pressure tracheae branch, the other end of indoor heat exchanger is connected with described liquid pipe via the liquid branch pipe, described conditioner can make many described indoor units carry out cooling operation or warming operation simultaneously, perhaps mix and implement described cooling operation and warming operation, described conditioner is characterised in that, possess and have second compressor, second outdoor heat exchanger and second outdoor expansion valve and second outdoor unit that is connected by these two pipe arrangements of tracheae and liquid pipe, the liquid pipe of pipe arrangement between the liquid pipe of described second outdoor unit and described unit is connected, and uses valve body external member that the high-pressure air pipe of pipe arrangement between the tracheae of described second outdoor unit and described unit or low pressure tracheae are selected one to be connected with flow channel switching valve.
According to this structure, because valve body external member that can be by having flow channel switching valve is connected pipe arrangement between second outdoor unit of so-called two pipe arrangement formulas and three root units, therefore can use second outdoor unit of two existing pipe arrangement formulas to constitute the outdoor unit of a part that is connected with the conditioner of three pipe arrangement formulas at an easy rate, thereby can reduce the price of conditioner integral body.
In addition, based on said structure, also can constitute, described valve body external member possesses unidirectional cross valve as described flow channel switching valve, first mouthful at this cross valve is connected with described tracheae, be connected with described low pressure tracheae at second mouthful, be connected with described high-pressure air pipe, close four-hole or be connected with described low pressure tracheae via capillary at this four-hole at the 3rd mouthful.According to this structure, can establish this simple structure of cross valve with folder and the high-pressure air pipe of pipe arrangement between the tracheae of second outdoor unit and unit or low pressure tracheae are selected one be connected, thereby the outdoor unit of so-called two pipe arrangement formulas can be connected with the conditioner of three pipe arrangement formulas.
In addition, also can constitute, described valve body external member is arranged on the structure in the outside of the framework of described second outdoor unit.According to this structure, therefore the outdoor unit that can use two existing pipe arrangement formulas under the situation that does not change matched tube structure can simplify the structure of the conditioner of three pipe arrangement formulas as second outdoor unit.
In addition, also can constitute, the ability of described first compressor possesses the ability of half at least of whole compressors that conditioner possesses.According to this structure, for example when changes in temperature mix the load balance that refrigeration load in the running and heating load be 50%: 50%, can use first outdoor unit that possesses first compressor to carry out operation of air conditioner, increase and during the load balance change, second outdoor unit can bear the unnecessary load of refrigeration load or heating load at refrigeration load or heating load.Therefore, no matter changes in temperature mix refrigeration load in the running and how the load balance of heating load changes, and can both realize the operation of air conditioner under this load balance.
In addition, also can constitute, described first outdoor unit possesses many described first outdoor heat exchangers that are set up in parallel, one end of each first outdoor heat exchanger is connected with described cold-producing medium bleed pipe and described refrigerant suction pipe via cold-producing medium bleed pipe branched pipe and refrigerant suction pipe branched pipe respectively, is respectively equipped with electromagnetic opening and closing valve on described cold-producing medium bleed pipe branched pipe and refrigerant suction pipe branched pipe.According to this structure, can be according to the refrigeration load in the changes in temperature mixing running and the load balance of heating load, control the action of each electromagnetic opening and closing valve and change the number of first outdoor heat exchanger that uses in the operation of air conditioner, therefore by suitably changing the number of this first outdoor heat exchanger, can realize the raising of the running efficiency in the operation of air conditioner.
In addition, also can constitute, one end of described indoor heat exchanger is connected with described high-pressure air pipe and described low pressure tracheae via gases at high pressure branched pipe and low-pressure gas branched pipe respectively, is respectively equipped with electromagnetic opening and closing valve on described gases at high pressure branched pipe and low-pressure gas branched pipe.
According to the present invention, because valve body external member that can be by having flow channel switching valve is connected pipe arrangement between the outdoor unit of so-called two pipe arrangement formulas and three root units, therefore can use the outdoor unit of two existing pipe arrangement formulas to constitute the outdoor unit of a part that is connected with the conditioner of three pipe arrangement formulas at an easy rate, thereby can reduce the price of conditioner integral body.
Description of drawings
Fig. 1 is the loop diagram that flows that an embodiment of conditioner of the present invention is shown and this conditioner is shown the cold-producing medium when carrying out cooling operation.
Fig. 2 is the loop diagram that flows of the cold-producing medium when conditioner being shown carrying out warming operation.
Fig. 3 is that conditioner is shown is the loop diagram that flows that main body is carried out the cold-producing medium of changes in temperature when mixing running with the refrigeration.
Fig. 4 is the loop diagram that flows that is illustrated in the cold-producing medium when using first outdoor heat exchanger as condenser among Fig. 3.
Fig. 5 is that conditioner is shown is the loop diagram that flows that main body is carried out the cold-producing medium of changes in temperature when mixing running with the heating.
Fig. 6 is the loop diagram that flows that is illustrated in the cold-producing medium when using first outdoor heat exchanger as evaporimeter among Fig. 5.
Symbol description:
1 conditioner
2 first outdoor units
3 second outdoor units
4A～4D indoor unit
Pipe arrangement between Unit 5
6 low pressure tracheaes
7 high-pressure air pipes
8 liquid pipes
20 first compressors
21 first outdoor heat exchangers
22 first expansion valves
30 second compressors
31 cross valves
32 second outdoor heat exchangers
33 second expansion valves
35 tracheaes
36 liquid pipes
50 valve body external members
51 cross valves (flow channel switching valve)
52 casings
53 capillaries
The specific embodiment
Below, with reference to accompanying drawing, one embodiment of the present invention is described.
Fig. 1 is the loop diagram that an embodiment of conditioner of the present invention is shown.The outdoor unit that this conditioner 1 possesses three pipe arrangement formulas is first outdoor unit 2; The outdoor unit of two pipe arrangement formulas i.e. second outdoor unit 3; Many (for example 4) indoor unit 4A, 4B, 4C, 4D.Pipe arrangement 5 between described first outdoor unit 2 and second outdoor unit 3 and unit that indoor unit 4A～4D is connected is comprised low pressure tracheae 6, high-pressure air pipe 7, liquid pipe 8, conditioner 1 can make indoor unit 4A～4D carry out cooling operation or warming operation simultaneously, perhaps mixes and implements described cooling operation and warming operation.
In addition, in indoor unit 4A, dispose the gateway temperature or the temperature sensor (omitting diagram) of room temperature and the pressure sensor (omitting diagram) of the refrigerant pressure in the detection indoor heat exchanger 10A etc. that detect indoor heat exchanger 10A, in addition, also possesses the testing result of importing described each sensor and the Indoor Control Device (omitting diagram) of carrying out the control of this indoor unit 4A.In addition, indoor unit 4B～4D and indoor unit 4A are roughly the same structure, therefore the same symbol of same section mark are represented, and are omitted explanation.
First outdoor unit 2 possesses: first compressor of ability changeable type (DC converter compressor) 20; Many (in the present embodiment being two) first outdoor heat exchangers 21,21 that are connected in parallel with this first compressor 20; First expansion valve 22,22; Accommodate the first module casing (framework) 23 of above-mentioned parts, in this first module casing 23, be provided with respectively low pressure tracheae auxiliary valve 23A, high-pressure air pipe auxiliary valve 23B and the first liquid pipe auxiliary valve 23C that low pressure tracheae 6, high-pressure air pipe 7 and liquid pipe 8 with pipe arrangement 5 between the equipment in the first module casing 23 and unit are connected.
In this structure, the ability of first compressor 20 possesses the ability of half at least of whole compressors that conditioner 1 possessed.Thus, when for example under refrigeration load and heating load are 50%: 50% load balance, carrying out changes in temperature and mixing running, only use first outdoor unit 2 that possesses first compressor 20, just can carry out refrigeration and the warming operation of each indoor unit 4A～4D.And, increase at refrigeration load or heating load, for example load balance being changed to refrigeration load and heating load is 60%: 40% o'clock, second outdoor unit 3 can bear unnecessary refrigeration load.Therefore, no matter changes in temperature mix the refrigeration load of the indoor unit 4A～4D in the running and how the load balance of heating load changes, and also can realize the operation of air conditioner under this load balance.
Suction inlet at first compressor 20 is connected with refrigerant suction pipe 24, and this refrigerant suction pipe 24 is branched off into two, and a side cold-producing medium sucks branched pipe 24A and is connected with low pressure tracheae 6 via low pressure tracheae auxiliary valve 23A.And the opposing party's cold-producing medium sucks branched pipe 24B and then is branched off into two, is connected with first outdoor heat exchanger 21 via low-pressure side open and close valve (electromagnetic opening and closing valve) 25 respectively.
In addition, be connected with cold-producing medium bleed pipe 26 at the ejiction opening of first compressor 20, these cold-producing medium bleed pipe 26 logical check-valves 27 are branched off into two.One side's cold-producing medium ejection branched pipe 26A is connected with high-pressure air pipe 7 via high-pressure air pipe auxiliary valve 23B.And the opposing party's cold-producing medium sprays branched pipe 26B and then is branched off into two, is connected with first outdoor heat exchanger 21 via high-pressure side open and close valve (electromagnetic opening and closing valve) 28 respectively.Described low-pressure side open and close valve 25 and high-pressure side open and close valve 28 are controlled so as to the either party and optionally open, and change the transfer valve that optionally is communicated with the either party of the refrigerant suction pipe 24 of first compressor 20 or cold-producing medium bleed pipe 26 into as the end-grain cutting with first outdoor heat exchanger 21 and work.
The other end at first outdoor heat exchanger 21 is connected with liquid pipe in the first module (liquid pipe) 29, and liquid pipe 29 is connected with liquid pipe 8 via first expansion valve 22 and the first liquid pipe auxiliary valve 23C in this first module.
The temperature sensor (omission illustrates) that in first outdoor unit 2, disposes respectively each pressure sensor (omitting diagram) that the refrigerant pressure in suction pressure, ejection pressure or each first outdoor heat exchanger 21,21 to first compressor 20 detects and the gateway temperature or the outer temperature degree of each first outdoor heat exchanger 21,21 detected etc., in addition, also possesses the testing result of importing described each sensor and the first outdoor control device (omitting diagram) that carries out the control of first outdoor unit 2.
Second outdoor unit 3 possess the ability changeable type second compressor (DC converter compressor) 30, cross valve 31, second outdoor heat exchanger 32, second expansion valve 33, accommodate second unit box 34 of above-mentioned parts, in this second unit box 34, be provided with the tracheae auxiliary valve 34A, the second liquid pipe auxiliary valve 34B that respectively the equipment in second unit box 34 are connected with tracheae 35 and liquid pipe 36 these two pipe arrangements.Second outdoor unit 3 is the outdoor units that can carry out existing two pipe arrangement formulas (two paths) of cooling operation or warming operation by switching cross valve 31.
The cold-producing medium bleed pipe 37 of second compressor 30 is connected with cross valve 31 via check-valves 38, on this cross valve 31 via the unit in tracheae 39 be connected with an end of second outdoor heat exchanger 32.The other end at this second outdoor heat exchanger 32 is connected with liquid pipe 40 in Unit second.Liquid pipe 40 is connected with the second liquid pipe auxiliary valve 34B via second expansion valve 33 in this Unit second.On this second liquid pipe auxiliary valve 34B, be connected with liquid pipe 36.
On the other hand, the refrigerant suction pipe 41 of second compressor 30 is connected with cross valve 31, on this cross valve 31 via the unit in tracheae 42 be connected with tracheae auxiliary valve 34A.On this tracheae auxiliary valve 34A, be connected with tracheae 35.
In addition, the temperature sensor (omission illustrates) that on second outdoor unit 3, disposes respectively each pressure sensor (omitting diagram) that the refrigerant pressure in suction pressure, ejection pressure or second outdoor heat exchanger 32 to second compressor 30 detects and the gateway temperature or the outer temperature degree of second outdoor heat exchanger 32 detected etc., in addition, also possesses the testing result of importing described each sensor and the second outdoor control device (omitting diagram) that carries out the control of second outdoor unit 3.
In the present embodiment, first outdoor unit 2 plays a role as main frame, the first outdoor control device of this first outdoor unit 2 is based on indicating via the user who omits illustrated remote control input, communicate by letter with the second outdoor control device or each Indoor Control Device, and carry out the running control of this conditioner 1 integral body.
Yet,, therefore can't be directly pipe arrangement 5 between two pipe arrangements and three root units be connected because second outdoor unit 3 possesses two tracheae 35 and liquid pipes 36 that extend from second unit box 34.Therefore, in this structure, conditioner 1 possesses the high-pressure air pipe 7 or the low pressure tracheae 6 of pipe arrangement 5 between the tracheae 35 that will extend from second outdoor unit 3 and unit and selects a valve body external member 50 that is connected.This valve body external member 50 possesses the unidirectional cross valve 51 and the casing 52 of accommodating this cross valve 51 as flow channel switching valve, is formed with the connector that is connected with above-mentioned tracheae 35, high-pressure air pipe 7 and low pressure tracheae 6 respectively on this casing 52.And the liquid pipe 8 of pipe arrangement 5 is connected between the liquid pipe 36 that extends from second unit box 34 and unit.
Valve body external member 50 is to be used for the outdoor unit of the two existing pipe arrangement formulas special-purpose external member that promptly pipe arrangement 5 is connected between second outdoor unit 3 and unit is provided with a deck valve body external member 50 to one second outdoor unit 3.Thus, by using valve body external member 50, pipe arrangement 5 between second outdoor unit 3 of two existing pipe arrangement formulas and unit can be connected, the outdoor unit that therefore can replace three pipe arrangement formulas of matched tube structure complexity and high price, and adopt the outdoor unit of the outdoor unit of cheap two existing pipe arrangement formulas, thereby can reduce the price of conditioner 1 integral body as a part that is connected with the conditioner 1 of three pipe arrangement formulas.
In addition, valve body external member 50 is configured in the outside of second unit box 34 of second outdoor unit 3.Thus, can under the situation that does not change matched tube structure, second outdoor unit 3 of two existing pipe arrangement formulas be used in the conditioner 1 of three pipe arrangement formulas, therefore can simplify the structure of conditioner 1.
On the cross valve 51 of valve body external member 50, be provided with four mouth A～D, be connected with tracheae 35 at first mouthful of A, be connected with low pressure tracheae 6, be connected with high-pressure air pipe 7 at the 3rd mouthful of C at second mouthful of B, be connected with capillary 53 at four-hole D, the other end of this capillary 53 is connected with low pressure tracheae 6.
In the present embodiment, when second outdoor unit 3 stopped, the mobile of cold-producing medium in the refrigerant piping that is connected with this second outdoor unit 3 (high-pressure air pipe 7 of pipe arrangement 5, low pressure tracheae 6 and tracheae 35 between the unit) stopped.Therefore, for prevent cold-producing medium in refrigerant piping amass into, and connect low pressure tracheaes 6 via capillary 53 at this four-hole D.In addition, also can low pressure tracheae 6 be connected with four-hole D via capillary 53 and only by airtight four-hole D such as sealing bolts.
The cross valve 51 of valve body external member 50 is by the second outdoor control device control action of second outdoor unit 3.
Next, the running action of this conditioner 1 is described.
When making whole indoor unit 4A～4D carry out cooling operation simultaneously, high-pressure air pipe 7 becomes dormant state.In this case, as shown in Figure 1, in first outdoor unit 2, open high-pressure side open and close valve 28 and close low-pressure side open and close valve 25, and, in second outdoor unit 3, cross valve 31 is switched to the ejection cold-producing medium of second compressor 30 position to the cooling operation of second outdoor heat exchanger, 32 guiding.And, in whole indoor unit 4A～4D, close first open and close valve 15A～15D, open second open and close valve 16A～16D.And in valve body external member 50, cross valve 51 is switched to first switching position that first mouthful of A and second mouthful of B and the 3rd mouthful of C and four-hole D are communicated with respectively.
Thus, flow to cold-producing medium bleed pipe 26, the opposing party's cold-producing medium ejection branched pipe 26B, high-pressure side open and close valve 28, first outdoor heat exchanger 21 successively from the cold-producing medium of first compressor, 20 ejections, in this first outdoor heat exchanger 21 behind the condensation liquefaction, by liquid pipe 29 in the first module, flow into the liquid pipe 8 of pipe arrangement 5 between the unit.On the other hand, flow to cold-producing medium bleed pipe 37, cross valve 31, second outdoor heat exchanger 32 successively from the cold-producing medium of second compressor, 30 ejections, in this second outdoor heat exchanger 32 behind the condensation liquefaction, by liquid pipe 36, flow into the liquid pipe 8 of pipe arrangement 5 between the unit, and in this liquid pipe 8, collaborate with the cold-producing medium that flows out from first outdoor unit 2.
The flowing liquid cold-producing medium is assigned to indoor expansion valve 11A～11D of each indoor unit 4A～4D in liquid pipe 8, and is depressurized at this.Then, post-decompression cold-producing medium flows into low-pressure gas pipe 6 by second open and close valve 16A～16D, low-pressure gas branched pipe 14A～14D respectively, and be assigned as two strands in this low-pressure gas pipe 6 evaporate gasification in each indoor heat exchanger 10A～10D after.
One side's cold-producing medium flows into first outdoor unit 2, is inhaled into first compressor 20 by refrigerant suction pipe 24.The opposing party's cold-producing medium flows into second outdoor unit 3 by cross valve 51, the tracheae 35 of valve body external member 50, is inhaled into second compressor 30 by cross valve 31, refrigerant suction pipe 41.So, simultaneously whole indoor unit 4A～4D is freezed by each the indoor heat exchanger 10A～10D that plays a role as evaporimeter.
When making whole indoor unit 4A～4D carry out warming operation simultaneously, low pressure tracheae 6 becomes dormant state.In this case, as shown in Figure 2, in first outdoor unit 2, close high-pressure side open and close valve 28 and open low-pressure side open and close valve 25, and in second outdoor unit 3, cross valve 31 is switched to the ejection cold-producing medium of second compressor 30 position to the warming operation of tracheae 35 guiding.And, in whole indoor unit 4A～4D, open first open and close valve 15A～15D, close second open and close valve 16A～16D.And in valve body external member 50, cross valve 51 is switched to second switching position that first mouthful of A and the 3rd mouthful of C and second mouthful of B and four-hole D are communicated with respectively.
Thus, flow into the high-pressure air pipe 7 of pipe arrangement 5 between the unit by cold-producing medium bleed pipe 26, a side's cold-producing medium ejection branched pipe 26A from the cold-producing medium of first compressor, 20 ejections.On the other hand, flow into the high-pressure air pipe 7 of pipe arrangement 5 between the unit from the cold-producing medium of second compressor, 30 ejections by the cross valve 51 of tracheae 42, tracheae 35 and valve body external member 50 in cold-producing medium bleed pipe 37, cross valve 31, the unit, and in this high-pressure air pipe 7, collaborate with the cold-producing medium that flows out from first outdoor unit 2.
After the gas refrigerant that flows in high-pressure air pipe 7 is assigned to gases at high pressure branched pipe 13A～13D of each indoor unit 4A～4D, flow to first open and close valve 15A～15D, indoor heat exchanger 10A～10D, in this liquefaction that is condensed respectively.Liquid refrigerant after this liquefaction flows liquid-in pipe 8 via liquid branch pipe 18A～18D, and is assigned as two strands in this liquid pipe 8.
One side's cold-producing medium flows into first outdoor unit 2, distributes to each first expansion valve 22,22, and is depressurized at this.Then, post-decompression cold-producing medium is inhaled into first compressor 20 by low-pressure side open and close valve 25,25, refrigerant suction pipe 24 evaporate gasification in each first outdoor heat exchanger 21,21 after.And the opposing party's cold-producing medium flows into second outdoor unit 3 by liquid pipe 36, by 33 decompressions of second expansion valve.Then, post-decompression cold-producing medium is inhaled into second compressor 30 by cross valve 31, refrigerant suction pipe 41 evaporate gasification in second outdoor heat exchanger 32 after.So, simultaneously whole indoor unit 4A～4D are heated by each the indoor heat exchanger 10A～10D that plays a role as condenser.
Making indoor unit 4A～4D is that main body is carried out changes in temperature when mixing running with the refrigeration, for example, makes indoor unit 4A～4C carry out cooling operation and when making indoor unit 4D carry out warming operation, all uses low pressure tracheae 6, high-pressure air pipe 7 and liquid pipe 8.
In this case, as shown in Figure 3, in first outdoor unit 2, high-pressure side open and close valve 28 and low-pressure side open and close valve 25 all are closed, and cold-producing medium does not flow to first outdoor heat exchanger 21,21.This be because, first outdoor unit 2 bear with indoor unit 4D in indoor unit 4A～4C of balancing each other of heating load in refrigeration load, second outdoor unit 3 bears remaining refrigeration load, and forms kind of refrigeration cycle.
In addition, in second outdoor unit 3, cross valve 31 is switched to the ejection cold-producing medium of second compressor 30 position to the cooling operation of second outdoor heat exchanger, 32 guiding.And, in indoor unit 4A～4C, close first open and close valve 15A～15C, open second open and close valve 16A～16C, and in indoor unit 4D, open the first open and close valve 15D, close the second open and close valve 16D.And in valve body external member 50, cross valve 51 is switched to first switching position that first mouthful of A and second mouthful of B and the 3rd mouthful of C and four-hole D are communicated with respectively.
Thus, flow into indoor unit 4D from the cold-producing medium of first compressor 20 ejection cold-producing medium ejection branched pipe 26A, the high-pressure air pipe 7 by cold-producing medium bleed pipe 26, a side.The cold-producing medium that flows into this indoor unit 4D flows to indoor heat exchanger 10D by gases at high pressure branched pipe 13D, the first open and close valve 15D.After this is condensed liquefaction, via liquid branch pipe 18D stream liquid-in pipe 8.
On the other hand, flow to cold-producing medium bleed pipe 37, cross valve 31, second outdoor heat exchanger 32 successively from the cold-producing medium of second compressor, 30 ejections, in this second outdoor heat exchanger 32, be condensed liquefaction after, by liquid pipe 36, flow into the liquid pipe 8 of pipe arrangement 5 between the unit, and in this liquid pipe 8, collaborate with the cold-producing medium that flows out from first outdoor unit 2.
After the flowing liquid cold-producing medium is assigned to indoor expansion valve 11A～11C of each indoor unit 4A～4C in liquid pipe 8, be depressurized at this.Then, post-decompression cold-producing medium evaporates gasification in each indoor heat exchanger 10A～10C after,, flow into low pressure tracheae 6, and in this low pressure tracheae 6, be assigned as two strands respectively by second open and close valve 16A～16C, low-pressure gas branched pipe 14A～14C.
One side's cold-producing medium flows into first outdoor unit 2, by refrigerant suction pipe 24, is inhaled into first compressor 20.And the opposing party's cold-producing medium flows into second outdoor unit 3 by cross valve 51, the tracheae 35 of valve body external member 50, by cross valve 31, refrigerant suction pipe 41, is inhaled into second compressor 30.So, respectively indoor unit 4A～4C is freezed, indoor unit 4D is heated by other indoor heat exchangers 10D that plays a role as condenser by the indoor heat exchanger 10A～10C that plays a role as evaporimeter.
In this structure, second outdoor unit 3 is connected via pipe arrangement 5 between valve body external member 50 and unit, thus by second outdoor heat exchanger, the 32 condensed cold-producing mediums of second outdoor unit 3 with collaborate in liquid pipe 8 by the condensed cold-producing medium of indoor heat exchanger 10D.Therefore, when carrying out changes in temperature mixing running, can set condensing pressure (condensation temperature) respectively alone by the indoor heat exchanger 10D and second outdoor heat exchanger 32 that play a role as condenser, when therefore for example outer temperature degree is low like that in the winter time, the condensing pressure of second outdoor heat exchanger 32 can be suppressed for to be lower than the condensing pressure of indoor heat exchanger 10D, thereby can realize the minimizing of the acting amount (consumed power) of second compressor 30.
In addition, increase and second outdoor heat exchanger 32 of second outdoor unit 3 can't supply with the time at the refrigeration load of indoor unit 4A～4C, as shown in Figure 4, open a side's of first outdoor unit 2 high-pressure side open and close valve 28, will be from the part of the cold-producing medium of first compressor 20 ejection to 21 guiding of first outdoor heat exchanger, thus this first outdoor heat exchanger 21 is played a role as condenser.
In this structure, first outdoor unit 2 possesses two first outdoor heat exchangers 21,21 that are set up in parallel, can make cold-producing medium distribute to each first outdoor heat exchanger 21,21 and flow, therefore by the refrigeration load in the changes in temperature mixing running and the load balance of heating load, can control the action of high-pressure side open and close valve 28 and low-pressure side open and close valve 25 and change the number of first outdoor heat exchanger 21,21 that uses in the operation of air conditioner, thereby can realize the raising of the running efficiency in the operation of air conditioner.
Making indoor unit 4A～4D is that main body is carried out changes in temperature when mixing running with the heating, for example, makes indoor unit 4A carry out cooling operation and when making indoor unit 4B～4D carry out warming operation, all uses low pressure tracheae 6, high-pressure air pipe 7 and liquid pipe 8.
In this case, as shown in Figure 5, in first outdoor unit 2, high-pressure side open and close valve 28 and low-pressure side open and close valve 25 all are closed, and cold-producing medium does not flow to first outdoor heat exchanger 21,21.
In addition, in second outdoor unit 3, cross valve 31 is switched to the ejection cold-producing medium of second compressor 30 position to the warming operation of tracheae 35 guiding.And, in indoor unit 4A, close the first open and close valve 15A, open the second open and close valve 16A, and, in indoor unit 4B～4D, open first open and close valve 15B～15D, close second open and close valve 16B～16D.And in valve body external member 50, cross valve 51 is switched to second switching position that first mouthful of A and the 3rd mouthful of C and second mouthful of B and four-hole D are communicated with respectively.
Thus, flow into the high-pressure air pipe 7 of pipe arrangement 5 between the unit by cold-producing medium bleed pipe 26, a side's cold-producing medium ejection branched pipe 26A from the cold-producing medium of first compressor, 20 ejections.On the other hand, flow into the high-pressure air pipe 7 of pipe arrangement 5 between the unit from the cold-producing medium of second compressor, 30 ejections by the cross valve 51 of tracheae 42, tracheae 35 and valve body external member 50 in cold-producing medium bleed pipe 37, cross valve 31, the unit, and in this high-pressure air pipe 7, collaborate with the cold-producing medium that flows out from first outdoor unit 2.
After the gas refrigerant that flows in high-pressure air pipe 7 is assigned to gases at high pressure branched pipe 13B～13D of each indoor unit 4B～4D, flow to first open and close valve 15B～15D, indoor heat exchanger 10B～10D, in this liquefaction that is condensed respectively.Liquid refrigerant after this liquefaction flows liquid-in pipe 8 via liquid branch pipe 18B～18D.
A part that flows into the liquid refrigerant of this liquid pipe 8 flows into indoor unit 4A, and by the indoor expansion valve 11A decompression of this indoor unit 4A, this post-decompression cold-producing medium evaporates gasification in indoor heat exchanger 10A.Then, the gas refrigerant after the evaporation gasification flows into first outdoor unit 2 by the second open and close valve 16A, low-pressure gas branched pipe 14A, low pressure tracheae 6, is inhaled into first compressor 20 by refrigerant suction pipe 24.
On the other hand, all the other of the liquid refrigerant of stream liquid-in pipe 8 flow into second outdoor unit 3 by liquid pipe 36, by 33 decompressions of second expansion valve.And post-decompression cold-producing medium is inhaled into second compressor 30 by cross valve 31, refrigerant suction pipe 41 evaporate gasification in second outdoor heat exchanger 32 after.So, indoor unit 4A is freezed, indoor unit 4B～4D is heated respectively by other indoor heat exchangers 10B～10D that plays a role as condenser by the indoor heat exchanger 10A that plays a role as evaporimeter.
In this structure, second outdoor unit 3 is connected via pipe arrangement 5 between valve body external member 50 and unit, therefore can will be guided by the indoor heat exchanger 10A of the part of the condensed cold-producing medium of each indoor heat exchanger 10B～10D of each indoor unit 4B～4D to indoor unit 4A, and with second outdoor heat exchanger 32 guiding of remaining cold-producing medium to second outdoor unit 3.Therefore, when carrying out changes in temperature mixing running, can set evaporating pressure (evaporating temperature) respectively alone by the indoor heat exchanger 10A and second outdoor heat exchanger 32 that play a role as evaporimeter.When therefore for example outer temperature degree is low like that in the winter time, compare with the evaporating temperature of second outdoor heat exchanger 32 that descends along with this outer temperature degree, the evaporating temperature of indoor heat exchanger 10D can be set at the suitable temperature higher than the evaporating temperature of this second outdoor heat exchanger 32.Thus, can prevent in the past that the evaporating temperature of indoor heat exchanger 10D like that is subjected to outer gas Temperature Influence and situation about descending, so not need to be used to the mechanism that prevents that this indoor heat exchanger 10D from freezing.
In addition, increase and second outdoor heat exchanger 32 of second outdoor unit 3 can't supply with the time at the heating load of indoor unit 4B～4D, as shown in Figure 6, open the low-pressure side open and close valve 25 of first outdoor unit 2, the part of the cold-producing medium that will flow in liquid pipe 8 is to the guiding of first outdoor heat exchanger 21, thereby this first outdoor heat exchanger 21 is played a role as evaporimeter.
In this structure, first outdoor unit 2 possesses two first outdoor heat exchangers 21,21 that are set up in parallel, can make cold-producing medium distribute to each first outdoor heat exchanger 21,21 and flow, therefore by the refrigeration load in the changes in temperature mixing running and the load balance of heating load, can control the action of high-pressure side open and close valve 28 and low-pressure side open and close valve 25 and change the number of first outdoor heat exchanger 21,21 that uses in the operation of air conditioner, thereby can realize the raising of the running efficiency in the operation of air conditioner.
More than, according to present embodiment, conditioner 1 comprises: first outdoor unit 2 of three pipe arrangement formulas, this first outdoor unit 2 possesses first compressor 20, first outdoor heat exchanger 21 and first outdoor expansion valve 22, and with three root units that constitute by high-pressure air pipe 7, low pressure tracheae 6, liquid pipe 8 between pipe arrangement 5 be connected; Many indoor unit 4A～4D, these many indoor unit 4A～4D possess indoor heat exchanger 10A～10D, conditioner 1 can make described indoor unit 4A～4D carry out cooling operation or warming operation simultaneously, perhaps mix and implement described cooling operation and warming operation, described conditioner 1 is characterised in that, possess and have second compressor 30, second outdoor heat exchanger 32 and second outdoor expansion valve 33 and second outdoor unit 3 that connects by tracheae 35 and liquid pipe 36 these two pipe arrangements, the liquid pipe 8 of pipe arrangement 5 between the liquid pipe 36 of second outdoor unit 3 and unit is connected, and using valve body external member 50 with cross valve 51 that the high-pressure air pipe 7 of pipe arrangement 5 between the tracheae 35 of second outdoor unit 3 and unit or low pressure tracheae 6 are selected one is connected, therefore pipe arrangement 5 between second outdoor unit 3 of so-called two pipe arrangement formulas and three root units can be connected, therefore can use second outdoor unit 3 of two existing pipe arrangement formulas constitute at an easy rate with described three root units between the outdoor unit of the part that is connected of pipe arrangement 5, thereby can reduce the price of conditioner 1 integral body.
In addition, according to present embodiment, valve body external member 50 possesses unidirectional cross valve 51, first mouthful of A at this cross valve 51 is connected with tracheae 35, be connected with low pressure tracheae 6 at second mouthful of B, be connected with high-pressure air pipe 7 at the 3rd mouthful of C, be connected with low pressure tracheae 6 at four-hole D via capillary 53, therefore, establish cross valve 51 these simple structures with folder and the high-pressure air pipe 7 of pipe arrangement 5 between the tracheae 35 of second outdoor unit 3 and unit or low pressure tracheae 6 can be selected one and be connected, thereby the outdoor unit 3 of so-called two pipe arrangement formulas can be connected with the conditioner 1 of three pipe arrangement formulas.
In addition, according to present embodiment, valve body external member 50 is arranged on the outside of second unit box 34 of second outdoor unit 3, therefore, therefore the outdoor unit that can use two existing pipe arrangement formulas under the situation that does not change matched tube structure can simplify the structure of the conditioner 1 of three pipe arrangement formulas as second outdoor unit 3.
In addition, according to present embodiment, the ability of first compressor 20 possesses the ability of half at least of whole compressors that conditioner 1 possessed, therefore when changes in temperature mix the load balance that refrigeration load in the running and heating load be 50%: 50%, can use first outdoor unit 2 that possesses first compressor 20 to carry out operation of air conditioner, increase and during the load balance change, second outdoor unit 3 can bear the unnecessary load of refrigeration load or heating load at refrigeration load or heating load.Therefore, no matter changes in temperature mix refrigeration load in the running and how the load balance of heating load changes, and can both realize the operation of air conditioner under this load balance.
In addition, according to present embodiment, first outdoor unit 2 possesses many first outdoor heat exchangers 21 that are set up in parallel, each first outdoor heat exchanger 21, an end of 21 is connected with cold-producing medium bleed pipe 26 and refrigerant suction pipe 24 via cold-producing medium bleed pipe branched pipe 26B and refrigerant suction pipe branched pipe 24B respectively, on described cold-producing medium bleed pipe branched pipe 26B and refrigerant suction pipe branched pipe 24B, high-pressure side open and close valve 28 and low-pressure side open and close valve 25 are set respectively, therefore can be according to the refrigeration load in the changes in temperature mixing running and the load balance of heating load, control the action of high-pressure side open and close valve 28 and low-pressure side open and close valve 25 and change first outdoor heat exchanger 21 that uses in the operation of air conditioner, 21 number, therefore by suitably changing this first outdoor heat exchanger 21,21 number can be realized the raising of the running efficiency in the operation of air conditioner.
In addition, the end of indoor heat exchanger 10A～10D is connected with high-pressure air pipe 7 and low pressure tracheae 6 via gases at high pressure branched pipe 13A～13D and low-pressure gas branched pipe 14A～14D respectively, and on described gases at high pressure branched pipe 13A～13D and low-pressure gas branched pipe 14A～14D, the first open and close valve 15A is set respectively, the second open and close valve 16A, therefore pass through the described first open and close valve 15A, the second open and close valve 16A carries out open and close controlling, indoor heat exchanger 10A～10D is played a role as evaporimeter or condenser, thereby the changes in temperature that can realize indoor unit 4A～4D simply mix running.
More than, based on above-mentioned embodiment the present invention has been described, but the present invention is not limited thereto.Valve body external member 50 forms the structure of cross valve 51 as flow channel switching valve is set, but is not limited thereto, and also can form the formation of a plurality of electromagnetic opening and closing valves of combination.
Claims (6)
1. conditioner, possesses first compressor, first outdoor unit of first outdoor heat exchanger and first outdoor expansion valve is connected by pipe arrangement between the unit with many indoor units that possess indoor heat exchanger, one end of described first outdoor heat exchanger is selected a ground and is connected with refrigerant suction pipe branch with the cold-producing medium bleed pipe of first compressor, pipe arrangement comprises the high-pressure air pipe that is connected to described cold-producing medium bleed pipe between described unit, be connected to the low pressure tracheae of described refrigerant suction pipe, be connected to the liquid pipe of the other end of described first outdoor heat exchanger, one end of indoor heat exchanger is selected a ground and described high-pressure air pipe and is connected with described low pressure tracheae branch, the other end of indoor heat exchanger is connected with described liquid pipe via the liquid branch pipe, described conditioner can make many described indoor units carry out cooling operation or warming operation simultaneously, perhaps mix and implement described cooling operation and warming operation
Described conditioner is characterised in that,
Possess and have second compressor, second outdoor heat exchanger and second outdoor expansion valve and second outdoor unit that is connected by these two pipe arrangements of tracheae and liquid pipe, the liquid pipe of pipe arrangement between the liquid pipe of described second outdoor unit and described unit is connected, and uses valve body external member that the high-pressure air pipe of pipe arrangement between the tracheae of described second outdoor unit and described unit or low pressure tracheae are selected one to be connected with flow channel switching valve.
2. conditioner according to claim 1 is characterized in that,
Described valve body external member possesses unidirectional cross valve as described flow channel switching valve, first mouthful at this cross valve is connected with described tracheae, be connected with described low pressure tracheae at second mouthful, be connected with described high-pressure air pipe at the 3rd mouthful, close four-hole or be connected with described low pressure tracheae via capillary at this four-hole.
3. conditioner according to claim 1 and 2 is characterized in that,
Described valve body external member is arranged on the outside of the framework of described second outdoor unit.
4. according to each described conditioner in the claim 1～3, it is characterized in that,
The ability of described first compressor possesses the ability of half at least of whole compressors that conditioner possesses.
5. according to each described conditioner in the claim 1～4, it is characterized in that,
Described first outdoor unit possesses many described first outdoor heat exchangers that are set up in parallel, one end of each first outdoor heat exchanger is connected with described cold-producing medium bleed pipe and described refrigerant suction pipe via cold-producing medium bleed pipe branched pipe and refrigerant suction pipe branched pipe respectively, is respectively equipped with electromagnetic opening and closing valve on described cold-producing medium bleed pipe branched pipe and refrigerant suction pipe branched pipe.
6. according to each described conditioner in the claim 1～5, it is characterized in that,
One end of described indoor heat exchanger is connected with described high-pressure air pipe and described low pressure tracheae via gases at high pressure branched pipe and low-pressure gas branched pipe respectively, is respectively equipped with electromagnetic opening and closing valve on described gases at high pressure branched pipe and low-pressure gas branched pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009198536A JP5283587B2 (en) | 2009-08-28 | 2009-08-28 | Air conditioner |
| JP2009-198536 | 2009-08-28 |
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| CN102003749A true CN102003749A (en) | 2011-04-06 |
| CN102003749B CN102003749B (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010268003 Expired - Fee Related CN102003749B (en) | 2009-08-28 | 2010-08-27 | Air conditioner |
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| CN (1) | CN102003749B (en) |
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Also Published As
| Publication number | Publication date |
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| JP2011047621A (en) | 2011-03-10 |
| JP5283587B2 (en) | 2013-09-04 |
| CN102003749B (en) | 2013-01-30 |
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