CN102538273B - Vapor-injected air-conditioning system, vapor-injected air-conditioning control method and air-conditioner - Google Patents

Vapor-injected air-conditioning system, vapor-injected air-conditioning control method and air-conditioner Download PDF

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CN102538273B
CN102538273B CN 201210029854 CN201210029854A CN102538273B CN 102538273 B CN102538273 B CN 102538273B CN 201210029854 CN201210029854 CN 201210029854 CN 201210029854 A CN201210029854 A CN 201210029854A CN 102538273 B CN102538273 B CN 102538273B
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valve
flash vessel
compressor
refrigerant
refrigerant pipe
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CN102538273A (en
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刘金涛
郑学利
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Hisense Shandong Air Conditioning Co Ltd
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Hisense Shandong Air Conditioning Co Ltd
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Abstract

The invention provides a vapor-injected air-conditioning system, a vapor-injected air-conditioning control method and an air-conditioner, which can solve the problems of incapability of refrigerant flow adjustment, complex structure, poor refrigerating/heating effect and the like of the prior art. The technical scheme includes that the vapor-injected air-conditioning system comprises a compressor, a controller, a four-way valve, a condenser, an evaporator, a flash evaporator, an electromagnetic valve and refrigerant pipes. Two refrigerant pipe connector ends of the flash evaporator are arranged at the refrigerant pipes between the evaporator and the condenser and connected with the refrigerant pipes on the respective side, a refrigerant outlet at one end of the flash evaporator is connected with the compressor through one refrigerant pipe provided with a one-way valve and the electromagnetic valve, and an electronic expansion valve is arranged on the refrigerant pipe arranged between the condenser and the flash evaporator. A vapor-injected flow control system is simplified, cost is reduced, refrigerant flow control of the system is optimized by using the electronic expansion valve for controlling, and refrigerating and heating performances are improved.

Description

Tonifying Qi increases enthalpy air-conditioning system and control method and air-conditioner
Technical field
The invention belongs to the air conditioning and refrigeration field of engineering technology, specifically, relate to a kind of tonifying Qi that adopts electric expansion valve dynamically to adjust flow and increase the enthalpy air-conditioning system.
Background technology
Existing tonifying Qi increases the air-conditioning system of enthalpy, all adopts capillary to carry out throttling, and tonifying Qi and restriction separation structure complexity can't realize dynamic refrigerant flow adjusting, and cost is high, and heating effect still can not be given full play to.
Fig. 1 is the air-conditioning system that a kind of tonifying Qi of form increases enthalpy, and referring to Fig. 1, this technical scheme flow process is:
When kind of refrigeration cycle, the magnetic valve A9 in system and magnetic valve B18 are closed condition.The kind of refrigeration cycle flow process: compressor 1 is discharged the HTHP cold media gas, enter condenser 6 after cross valve 5, become subcooled liquid after cooling, enter indoor evaporator 19 through check valve A8 and capillary A12, become low-temp low-pressure gas, through cross valve 5, gas-liquid separator 2, get back to compressor 1, after compressor 1 compression, become high temperature and high pressure gas, with this reciprocation cycle.
While heating, magnetic valve B18 opens, and magnetic valve A9 is according to outdoor temperature situation switch.Heat circulation process: the HTHP cold media gas that compressor 1 is discharged, enter indoor evaporator 19 through cross valve 5, become subcooled liquid after evaporimeter 19 is cooling, subcooled liquid enters flash vessel 14 after capillary D16 throttling, in flash vessel 14, partially liq becomes gas and enters compressor 1 through check valve C17 and magnetic valve B18, remaining liquid enters capillary B11 and capillary C10(when outdoor temperature is high through check valve B13, magnetic valve A9 opens, cold-producing medium passes through capillary B11 and capillary C10 simultaneously, when outdoor temperature is too low, magnetic valve A9 closes, cold-producing medium only passes through capillary B11), through the laggard external condenser 6 of entering the room of capillary-compensated, after condenser 6 evaporations become low-temp low-pressure gas, enter compressor 1 through cross valve 5 and gas-liquid separator 2, with magnetic valve B18 to the gas that becomes HTHP after the gas of compressor 1 compressed machine 1 compression together, with this, circulate.
The deficiency that the prior art exists is, 1, by Fig. 1 and above-mentioned two kinds of flow processs circulation, can be found out, this air-conditioning system need to configure 4 groups of capillaries, 3 check valves, 2 magnetic valves, the system architecture complexity, the cyclic process controlling unit is many, and adopts capillary-compensated, can't carry out the cold medium flux adjusting, cooling system/heating effect is poor, and Energy Efficiency Ratio is low, and system cost is high.During 2, due to kind of refrigeration cycle, refrigerant does not enter flash vessel, thereby needs polygamy to put a circuits, configures two circuits complex structures, and can not in kind of refrigeration cycle, carry out the control of refrigerant dynamic adjustments, is difficult to improve systematic function.
Summary of the invention
The invention provides a kind of tonifying Qi and increase enthalpy air-conditioning system and control method and air-conditioner, what it can solve that prior art exists can't carry out the problems such as cold medium flux adjusting, complex structure, refrigerating/heating weak effect.
The objective of the invention is in order to improve cooling system, heating effect, adopt electric expansion valve to carry out dynamic refrigerant flow adjusting, both simplified refrigerant control system, reduce costs, improved again the cooling or heating effect of system.
In order to reach the purpose solved the problems of the technologies described above, technical scheme of the present invention is, a kind of tonifying Qi increases the enthalpy air-conditioning system, comprise compressor, controller, cross valve, condenser, evaporimeter, flash vessel, magnetic valve and refrigerant pipe, described flash vessel has three refrigerant pipe interfaces, wherein, a refrigerant pipe interface arranges ?described flash vessel one end, this refrigerant pipe interface is refrigerant exit, other two refrigerant pipe interfaces are set up in parallel the other end at described flash vessel, two refrigerant pipe interface end of described flash vessel are arranged on the refrigerant pipeline place between described evaporimeter and described condenser, two refrigerant pipe interfaces connect respectively the refrigerant pipe of a side separately, the refrigerant exit of described flash vessel one end is connected with compressor by refrigerant pipe, be provided with the first check valve and described magnetic valve on this refrigerant pipe, the conducting direction of described the first check valve is the direction of flash vessel towards compressor, be provided with electric expansion valve on the refrigerant pipe between described condenser and described flash vessel.
The present invention also has following supplementary technology scheme:
Be provided with capillary and the second check valve on refrigerant pipe between described flash vessel and described evaporimeter, described capillary is in parallel with described the second check valve, and during refrigerating state, described the second check valve is conducting.
Two refrigerant pipe interfaces arranged side by side of described flash vessel are arranged on described flash vessel bottom, and another refrigerant pipe interface is arranged on described flash vessel top.
When kind of refrigeration cycle, refrigerant advances from one of them refrigerant interface of described flash vessel bottom, from another refrigerant interface, goes out; Heating circulation time, refrigerant advances from one of them refrigerant pipe interface of described flash vessel bottom, and from bottom, another refrigerant interface and top refrigerant interface go out.
The long tubular of described flash vessel, its volume scope is the 0.35-0.65 liter.
Be provided with high-voltage switch gear on the blast pipe between described cross valve and described compressor, be provided with low tension switch on the air intake duct between described cross valve and described compressor, described condenser and described evaporimeter middle part are equipped with temperature sensor, on described compressor suction duct and blast pipe, are equipped with temperature sensor.
A kind of tonifying Qi increases the control method of enthalpy air-conditioning system, during kind of refrigeration cycle, determine a target super heat value according to chamber, internal and external environment temperature, the difference of described compressor air suction temperature-evaporimeter middle part temperature of take is actual super heat value, if actual super heat value is greater than the target super heat value, described electric expansion valve is driven valve and is controlled, if actual super heat value is less than the target super heat value, described electric expansion valve is closed to valve and controls;
Heat circulation time, determine a target super heat value according to chamber, internal and external environment temperature, compressor air suction temperature-condenser middle part the temperature gap of take is actual super heat value, if actual super heat value is greater than the target super heat value, described electric expansion valve is driven valve and is controlled, if actual super heat value is less than the target super heat value, described electric expansion valve is closed to valve and controlled.
Described target super heat value, when excessive discharge temperature, reduces described target super heat value, if delivery temperature is too low, increases the target super heat value, and described delivery temperature scope is 65-90 ℃.
A kind of air-conditioner, include the technical scheme that above-mentioned tonifying Qi increases the enthalpy air-conditioning system.
A kind of air-conditioner, include the technical scheme that above-mentioned tonifying Qi increases enthalpy Air-condition system control method.
Refrigerating/heating circulation of the present invention is as follows: during kind of refrigeration cycle, compressor start, the HTHP cold media gas enters condenser by cross valve, become subcooled liquid after cold air, subcooled liquid is through the electric expansion valve throttling, enter flash vessel, due to magnetic valve in closed condition, refrigerant enters indoor evaporator from the outlet outflow of flash vessel through check valve, refrigerant becomes low-temp low-pressure gas after the indoor evaporator evaporation, gas is got back to compressor after cross valve and gas-liquid separator, compressor becomes the gas of HTHP to enter condenser the gas compression of low-temp low-pressure again, with this, circulate.During freezing, closed electromagnetic valve, electric expansion valve is regulated aperture automatically according to the degree of superheat and compressor air-discharging.
Heat circulation time, compressor start, high temperature and high pressure gas enters indoor evaporator by cross valve, after evaporator cools, become subcooled liquid, enter flash vessel after capillary-compensated, in flash vessel, part liquid becomes gas and directly enters compressor through check valve and magnetic valve, all the other liquid flow out from flash vessel, the process electric expansion valve is the laggard external condenser of entering the room of throttling again, become low-temp low-pressure gas in the condenser evaporation, low-temp low-pressure gas is through cross valve and gas-liquid separator is laggard enters compressor, the gas that compressor is compressed into low-temp low-pressure gas HTHP together with the gas that enters press from flash vessel enters indoor evaporator, with this, circulate.During heating, magnetic valve is opened control according to outdoor environment temperature and system pressure, electric current, delivery temperature situation.
From technical scheme of the present invention, can find out, the present invention adopts flash vessel is configured on the refrigerant pipeline between condenser and evaporimeter, make the refrigerant flash vessel of all can flowing through when the refrigerating/heating state, and adopted electric expansion valve, and capillary and the second check valve.Thereby can carry out the dynamic flow adjusting by electric expansion valve, and the refrigerating/heating performance is improved, and saves a circuits and respective one-way valve and magnetic valve, and structure is obviously simplified, cost.
The present invention compared with prior art has the following advantages and good effect:
1, adopt the electric expansion valve throttling, according to the operation of air conditioner situation, the dynamic debugging system cold medium flux, operation of air conditioner is in optimum state, safe and efficient energy-conservation.And prior art adopts capillary-compensated, cold medium flux is uncontrollable.
2, flash vessel goes out mode under advancing under adopting, and this mode can guarantee that, when refrigeration, cold-producing medium can arrive indoor set through flash evaporation smoothly, compared with prior art, without independent refrigeration throttle circuit is set, both simple flow reduced costs, and can realize again the dynamic adjustments of cold-producing medium.
Visible, the present invention has simplified tonifying Qi and has increased the enthalpy flow control system, has reduced cost, adopts electronic expansion valve controls simultaneously, and the refrigerant flow control of optimization system has improved and heated and refrigeration performance.Adopt air-conditioning system of the present invention, can realize that the variable-flow of cold-producing medium is controlled, can be for the multi-connected machine system.
The accompanying drawing explanation
Fig. 1 is the air-conditioning system figure that the tonifying Qi of existing a kind of form increases enthalpy,
1, compressor; 2, gas-liquid separator; 3, low tension switch; 4, high-voltage switch gear; 5, cross valve; 6, condenser; 7, filter A; 8, check valve A; 9, magnetic valve A; 10, capillary C; 11, capillary B; 12, capillary A; 13, check valve B; 14, flash vessel; 15, filter B; 16, capillary D; 17, check valve C; 18, magnetic valve B; 19, evaporimeter; 20, stop valve A; 21, stop valve B; 22, refrigerant pipeline;
Fig. 2 is the air-conditioning system figure that tonifying Qi of the present invention increases enthalpy;
1, compressor; 2, gas-liquid separator; 3, low tension switch; 4, high-voltage switch gear; 5, cross valve; 6, condenser; 6-1, condenser middle part temperature sensor; 7, filter A; 8, electric expansion valve; 9, flash vessel; 10, the first check valve; 11, magnetic valve; 12, capillary; 13, the second check valve; 14, filter B; 15, evaporimeter; 15-1, evaporimeter middle part temperature sensor; 16, stop valve A; 17, stop valve B; 18, refrigerant pipe; 19, compressor suction duct temperature sensor; 20, compressor exhaust pipe temperature sensor.
Fig. 2-1st, the flash vessel front view in air-conditioning system of the present invention;
Fig. 2-2nd, the upward view of Fig. 2-1;
Fig. 2-3rd, the refrigerant flash vessel schematic diagram of flowing through during kind of refrigeration cycle;
Fig. 2-4th, heat the circulation time refrigerant flash vessel schematic diagram of flowing through;
9, flash vessel; 9-1, refrigerant exit; 9-2, refrigerant pipe interface; 9-3, refrigerant pipe interface; 18-1, condenser side refrigerant pipe; 18-2, vaporizer side refrigerant pipe.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Referring to Fig. 2, increase the existing problem of enthalpy air-conditioning system in order to solve existing tonifying Qi, the present invention improves system, concrete technical scheme is: described tonifying Qi increases the enthalpy air-conditioning system and comprises compressor 1, controller (not shown in Fig. 2), cross valve 5, condenser 6, evaporimeter 15, flash vessel 9, magnetic valve 11 and refrigerant pipe 18.Referring to Fig. 2-1, Fig. 2-2, Fig. 2-3 and Fig. 2-4, described flash vessel 9 has three refrigerant pipe interfaces, a refrigerant pipe interface 9-1 is arranged on described flash vessel upper end, and this refrigerant pipe interface is refrigerant exit, and other two refrigerant pipe interface 9-2,9-3 are set up in parallel the lower end at described flash vessel 9.
2 refrigerant pipe interface 9-2,9-3 are import/exports of refrigerant, and when kind of refrigeration cycle, refrigerant pipe interface 9-2 is the refrigerant import, and refrigerant pipe interface 9-3 is refrigerant exit, referring to Fig. 2-3; Heating circulation time, refrigerant pipe interface 9-3 is the refrigerant import, and refrigerant pipe interface 9-2 is refrigerant exit, referring to Fig. 2-4.Two refrigerant pipe interface end of described flash vessel 9 lower ends are arranged on the refrigerant pipeline place between described evaporimeter 15 and described condenser 6, two refrigerant pipe interface 9-2,9-3 connect respectively the refrigerant pipe of a side separately, as refrigerant interface 9-2 connects refrigerant pipe 18-1, refrigerant interface 9-3 connects refrigerant pipe 18-2.The refrigerant exit 9-1 of described flash vessel 9 upper ends is connected with compressor 1 by refrigerant pipe, be provided with the first check valve 10 and described magnetic valve 11 on this refrigerant pipe, the conducting direction of described the first check valve 10 is the direction of flash vessel 9 towards compressor 1, on the refrigerant pipe between described condenser and described flash vessel, is provided with electric expansion valve 8.Be provided with capillary 12 and the second check valve 13 on refrigerant pipe between described flash vessel 9 and described evaporimeter 15, described capillary 12 is in parallel with described the second check valve 13, and during refrigerating state, described the second check valve 13 is conducting, while heating state, described the second check valve 13 not conductings.
The long tubular of described flash vessel 9, the volume scope of its cavity is the 0.35-0.65 liter.In the present embodiment, described flash vessel 9 volumes are 0.5 liter, referring to Fig. 2-1, Fig. 2-2, Fig. 2-3 and Fig. 2-4.
Be provided with high-voltage switch gear 4 on the blast pipe between described cross valve 5 and described compressor 1, on the air intake duct between described cross valve 5 and described compressor 1, be provided with low tension switch 3.
In order effectively dynamically to control cold medium flux, make the measurement temperature accurate, described condenser 6 middle parts are provided with temperature sensor 6-1, and described evaporimeter 15 middle parts are provided with temperature sensor 15-1.Be equipped with temperature sensor 19,20 on described compressor 1 air intake duct and blast pipe.
Referring to Fig. 2, during kind of refrigeration cycle, compressor 1 starts, the HTHP cold media gas enters condenser 6 by cross valve 5, become subcooled liquid after condensation, subcooled liquid is through electric expansion valve 8 throttlings, enter flash vessel 9 from refrigerant pipe 18-1 through the refrigerant import 9-2 of flash vessel 9, due to magnetic valve 11 in closed condition, the upper end closed of flash vessel 9 namely, referring to Fig. 2-3, refrigerant can only flow out from the outlet 9-3 of flash vessel 9, enter indoor evaporator 15 through check valve 13, refrigerant becomes low-temp low-pressure gas after indoor evaporator 15 evaporations, gas is got back to compressor 1 after cross valve 5 and gas-liquid separator 2, compressor 1 becomes the gas of HTHP to enter condenser 6 gas compression of low-temp low-pressure again, with this, circulate.During freezing, magnetic valve 11 cuts out, and electric expansion valve 8 is regulated aperture automatically according to the degree of superheat and compressor air-discharging.
Heat circulation time, compressor 1 starts, high temperature and high pressure gas enters indoor evaporator 15 by cross valve 5, after evaporimeter 15 is cooling, become subcooled liquid, after capillary 12 throttlings, enter flash vessel 9 through refrigerant pipe 18-2 and flash vessel inlet tube 9-3, due to magnetic valve 11 in opening state, in flash vessel 9, part liquid flows out from the refrigerant exit 9-1 on flash vessel 9 tops, become gas and directly enter compressor 1 through check valve 10 and magnetic valve 11, all the other liquid flow out to refrigerant pipe 18-1 from the outlet 9-2 of flash vessel 9, referring to Fig. 2-4, refrigerant passes through the electric expansion valve 8 laggard external condenser 6 of entering the room of throttling again again, become low-temp low-pressure gas in condenser 6 evaporations, low-temp low-pressure gas enters compressor 1 after cross valve 5 and gas-liquid separator 2, the gas that compressor 1 is compressed into low-temp low-pressure gas HTHP together with the gas that enters compressor 1 from flash vessel 9 enters indoor evaporator 15, with this, circulate.During heating, magnetic valve 11 is opened control according to outdoor environment temperature and system pressure, electric current, delivery temperature situation.
Dynamic throttling of the present invention is controlled (electric expansion valve 8 is controlled): described air-conditioner is when kind of refrigeration cycle, controller receives indoor environment temperature value and the outdoor environment temperature value collected for detection of the indoor and outdoor environment temperature sensor, and then determines a target super heat value according to chamber, internal and external environment temperature; Then receive respectively the compressor air suction temperature and the evaporimeter middle part temperature that are installed on the suction temperature sensor 19 at compressor suction duct place and are installed on the middle part temperature sensor 15-1 collection output at evaporimeter middle part, the difference of described compressor air suction temperature and evaporimeter middle part temperature is compared as actual super heat value and described target super heat value, if actual super heat value is greater than the target super heat value, described electric expansion valve 8 is opened to the valve operation; If actual super heat value is less than the target super heat value, described electric expansion valve 8 is closed to the valve operation.The target super heat value, when excessive discharge temperature, reduces the target super heat value, if delivery temperature is too low, increases the target super heat value.
While heating, determine a target super heat value according to chamber, internal and external environment temperature, the compressor 1 suction temperature value-condenser 6 middle part temperature gaps of take are actual super heat value, if actual super heat value is greater than the target super heat value, electric expansion valve 8 is driven valve and is controlled, and increases open degree, and electric expansion valve 8 is closed valve control on the contrary, turn down open degree, and then dynamically control cold medium flux.The target super heat value, when excessive discharge temperature, reduces the target super heat value, if delivery temperature is too low, increases the target super heat value.While heating, electric expansion valve 8 under different outdoor environment temperatures, aperture scope difference.
The delivery temperature scope of described compressor is 65-90 ℃.
By the dynamic adjustments of electric expansion valve 8, can reach the purpose that actual super heat value is identical with the target super heat value, thereby improve air-conditioning heating and refrigeration performance and Energy Efficiency Ratio.
Visible, air-conditioning system of the present invention is simple in structure, and cost is low, and can dynamically control cold-producing medium, thereby has improved Performance for Air Conditioning Systems.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.All technical solution of the present invention contents that do not break away from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.

Claims (7)

1. a tonifying Qi increases the enthalpy air-conditioning system, comprise compressor, controller, cross valve, condenser, evaporimeter, flash vessel, magnetic valve, and refrigerant pipe, described flash vessel has three refrigerant pipe interfaces, wherein, a refrigerant pipe interface is arranged on described flash vessel one end, this refrigerant pipe interface is refrigerant exit, other two refrigerant pipe interfaces are set up in parallel the other end at described flash vessel, it is characterized in that: two refrigerant pipe interface end of described flash vessel are arranged on the refrigerant pipeline place between described evaporimeter and described condenser, two refrigerant pipe interfaces connect respectively the refrigerant pipe of a side separately, the refrigerant exit of described flash vessel one end is connected with compressor by refrigerant pipe, be provided with the first check valve and described magnetic valve on this refrigerant pipe, the conducting direction of described the first check valve is the direction of flash vessel towards compressor, be provided with electric expansion valve on the refrigerant pipe between described condenser and described flash vessel, be provided with capillary and the second check valve on refrigerant pipe between described flash vessel and described evaporimeter, described capillary is in parallel with described the second check valve, during refrigerating state, described the second check valve is conducting ,two refrigerant pipe interfaces arranged side by side of described flash vessel are arranged on described flash vessel bottom, and another refrigerant pipe interface is arranged on described flash vessel top,
During kind of refrigeration cycle, compressor start, the HTHP cold media gas enters condenser by cross valve, become subcooled liquid after condensation, subcooled liquid is through the electric expansion valve throttling, enter flash vessel from refrigerant pipe through the refrigerant import of flash vessel, magnetic valve is in closed condition, the upper end closed of flash vessel namely, refrigerant can only flow out from the outlet of flash vessel, enter indoor evaporator through check valve, refrigerant becomes low-temp low-pressure gas after the indoor evaporator evaporation, gas is got back to compressor after cross valve and gas-liquid separator, compressor becomes the gas of HTHP to enter condenser the gas compression of low-temp low-pressure again, with this, circulate, during freezing, closed electromagnetic valve, electric expansion valve is regulated aperture automatically according to the degree of superheat and compressor air-discharging,
Heat circulation time, compressor start, high temperature and high pressure gas enters indoor evaporator by cross valve, after evaporator cools, become subcooled liquid, after capillary-compensated, enter flash vessel through refrigerant pipe and flash vessel inlet tube, magnetic valve is in opening state, in flash vessel, part liquid flows out from the refrigerant exit on flash vessel top, become gas and directly enter compressor through check valve and magnetic valve, all the other liquid flow out to refrigerant pipe from the outlet of flash vessel, refrigerant passes through the electric expansion valve laggard external condenser of entering the room of throttling again again, become low-temp low-pressure gas in the condenser evaporation, low-temp low-pressure gas is through cross valve and gas-liquid separator is laggard enters compressor, the gas that compressor is compressed into low-temp low-pressure gas HTHP together with the gas that enters compressor from flash vessel enters indoor evaporator, with this, circulate, during heating, magnetic valve is according to outdoor environment temperature and system pressure, electric current, the delivery temperature situation is opened control.
2. a kind of tonifying Qi according to claim 1 increases the enthalpy air-conditioning system, it is characterized in that: the long tubular of described flash vessel, its volume scope is the 0.35-0.65 liter.
3. a kind of tonifying Qi according to claim 1 and 2 increases the enthalpy air-conditioning system, it is characterized in that: on the blast pipe between described cross valve and described compressor, be provided with high-voltage switch gear, be provided with low tension switch on the air intake duct between described cross valve and described compressor, described condenser and described evaporimeter middle part are equipped with temperature sensor, on described compressor suction duct and blast pipe, are equipped with temperature sensor.
4. the described tonifying Qi of claim 1 increases the control method of enthalpy air-conditioning system, it is characterized in that: during kind of refrigeration cycle, determine a target super heat value according to chamber, internal and external environment temperature, the difference of compressor air suction temperature-evaporimeter middle part temperature of take is actual super heat value, if actual super heat value is greater than the target super heat value, described electric expansion valve is driven valve and is controlled, if actual super heat value is less than the target super heat value, described electric expansion valve is closed to valve and controls;
Heat circulation time, determine a target super heat value according to chamber, internal and external environment temperature, compressor air suction temperature-condenser middle part the temperature gap of take is actual super heat value, if actual super heat value is greater than the target super heat value, described electric expansion valve is driven valve and is controlled, if actual super heat value is less than the target super heat value, described electric expansion valve is closed to valve and controlled.
5. method according to claim 4, it is characterized in that: described target super heat value, when excessive discharge temperature, reduces described target super heat value, if delivery temperature is too low, increases the target super heat value, and described delivery temperature scope is 65-90 ℃.
6. an air-conditioner, is characterized in that: include the described a kind of tonifying Qi of any one claim in claim 1-3 and increase the enthalpy air-conditioning system.
7. an air-conditioner is characterized in that: include the control method that the described tonifying Qi of any one claim in claim 4-5 increases the enthalpy air-conditioning system.
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