CN105091258A - Air conditioner and cooling control method thereof - Google Patents
Air conditioner and cooling control method thereof Download PDFInfo
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- CN105091258A CN105091258A CN201410223239.5A CN201410223239A CN105091258A CN 105091258 A CN105091258 A CN 105091258A CN 201410223239 A CN201410223239 A CN 201410223239A CN 105091258 A CN105091258 A CN 105091258A
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Abstract
The invention discloses an air conditioner and a cooling control method thereof. The air conditioner comprises a compressor, control valve components, an outdoor heat exchanger, a first throttling element, an auxiliary heat exchanger, an electric control box, an electric control heat exchanger, a first temperature detector, a second temperature detector and a third temperature detector, wherein a first refrigerant channel of the auxiliary heat exchanger is connected with the first throttling element, and a second refrigerant channel of the auxiliary heat exchanger is connected with the first throttling element through the second throttling element; the three temperature detectors are connected with an electric control module; the first temperature detector is used for detecting the electric control temperature of the electric control module; the second temperature detector and the third temperature detector are respectively used for detecting the dry-bulb temperature and the wet-bulb temperature of the internal environment of the electric control box; and the electric control module controls the opening degree of the second throttling element according to detection results of the three temperature detectors. According to the air conditioner provided by the embodiment of the invention, the phenomenon of short circuit of the electric control module, caused by production of condensed water in the electric control box during temperature reduction of the electric control module, is avoided.
Description
Technical field
The present invention relates to a kind of electrical equipment manufacturing technology field, especially relate to a kind of air-conditioner and cooling control method thereof.
Background technology
Nowadays convertible frequency air-conditioner uses more and more extensive, and the electronic control module more complicated corresponding with frequency-changeable compressor, the heat radiation of electronic control module is the problem comparing in the industry concern always.The mode of general employing fin heat radiation, also has and adopts refrigerant pipe and electronic control module to fit the mode of forced cooling.Fin heat radiation needs larger fin headspace, and the wind field of air-conditioning has considerable influence to radiating effect.And although the effect of refrigerant pipe cooling cooling is better, may causes when refrigerant pipe temperature is too low producing condensed water in electric-controlled box, have the risk of short circuit.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.
For this reason, one object of the present invention is to propose a kind of air-conditioner, prevents from producing condensed water in electric-controlled box and causing electronic control module short circuit.
Another object of the present invention is the cooling control method proposing a kind of above-mentioned air-conditioner.
According to the air-conditioner of the embodiment of the present invention, comprising: compressor, described compressor has exhaust outlet and gas returning port; Control valve assembly, described control valve assembly comprises first to fourth interface, one of them conducting in described first interface and described second interface and described 3rd interface, another conducting in described 4th interface and described second interface and described 3rd interface, described first interface is connected with described gas returning port with described exhaust outlet respectively with described 4th interface; Outdoor heat exchanger, one end of described outdoor heat exchanger is connected with described second interface; First throttle element, one end of described first throttle element is connected with the other end of described outdoor heat exchanger; Auxiliary heat exchanger, described auxiliary heat exchanger has the first refrigerant passage and the second refrigerant passage, the first end of described first refrigerant passage is connected with the other end of described first throttle element, the first end of described second refrigerant passage is connected by the other end of second section fluid element with described first throttle element, and the second end of described second refrigerant passage is connected with described gas returning port; Electric-controlled box, is provided with electronic control module in described electric-controlled box, and described electronic control module is electrically connected with described compressor and described second section fluid element; Automatically controlled heat exchanger, the contiguous described electric-controlled box of described automatically controlled heat exchanger is arranged to carry out heat exchange with described electronic control module, and described automatically controlled heat exchanger has the 3rd refrigerant passage, and one end of described 3rd refrigerant passage is connected with the second end of described first refrigerant passage; First to the 3rd temperature-detecting device, described first to the 3rd temperature-detecting device is connected with described electronic control module respectively, described first temperature-detecting device is for detecting the automatically controlled temperature of described electronic control module, described second temperature-detecting device and described 3rd temperature-detecting device are respectively used to the dry-bulb temperature and the wet-bulb temperature that detect described electric-controlled box environment, and wherein said electronic control module controls the aperture of described second section fluid element according to the testing result of the described first to the 3rd temperature-detecting device.
According to the air-conditioner of the embodiment of the present invention, by being provided with auxiliary heat exchanger, second section fluid element, first temperature-detecting device, second temperature-detecting device and the 3rd temperature-detecting device, thus electronic control module can control the aperture of second section fluid element according to the testing result of the first to the 3rd temperature-detecting device, thus control the exothermic temperature of automatically controlled heat exchanger, the temperature of electronic control module can be controlled in the scope of setting, ensure that and prevent from producing condensed water in electric-controlled box while lowering the temperature to electronic control module and cause electronic control module short circuit, improve the reliability of electronic control module, improve the service life of the element in electric-controlled box.
In addition, air-conditioner according to the above embodiment of the present invention can also have following additional technical characteristic:
In further embodiment of the present invention, air-conditioner also comprises the first control valve and the second control valve, described first control valve is connected between the second end of described first refrigerant passage and one end of described 3rd refrigerant passage, described second control valve is in parallel with described first control valve and described automatically controlled heat exchanger, and described electronic control module and described first control valve are connected with described second control valve the running status to control described first control valve and described second control valve according to the testing result of the described first to the 3rd temperature-detecting device.Thus can prevent from further producing condensed water in electric-controlled box and causing electronic control module short circuit.
Particularly, described first control valve and described second control valve are respectively magnetic valve.
In further embodiment of the present invention, air-conditioner also comprises gas-liquid separator, and described gas-liquid separator has entrance and import, and described entrance is connected with the second end of described second refrigerant passage with described 4th interface, and described outlet is connected with described gas returning port.Thus compressor can be avoided to occur liquid hit phenomenon.
Preferably, described control valve assembly is cross valve.
Alternatively, described first throttle element is electric expansion valve, and described second section fluid element is electric expansion valve.
In further embodiment of the present invention, air-conditioner also comprises check valve, and the arrival end of described check valve is connected with the other end of described 3rd refrigerant passage, and described second control valve is in parallel with described check valve.Thus improve the reliability of air-conditioner, avoid when the second control valve is opened and the first control valve is closed, refrigerant flows in the 3rd refrigerant passage.
According to the cooling control method of the air-conditioner of the embodiment of the present invention, described air-conditioner comprises auxiliary heat exchanger, first throttle element and second section fluid element, described first throttle element is connected with the first refrigerant passage of described auxiliary heat exchanger, described second section fluid element is connected between the second refrigerant passage of described first throttle element and described auxiliary heat exchanger, described cooling control method comprises the steps: S1: the automatically controlled temperature T1 detecting electronic control module, detects dry-bulb temperature T2 and the wet-bulb temperature T3 of electric-controlled box environment; S2: calculate air dew point temperature T4 according to described dry-bulb temperature T2 and wet-bulb temperature T3, compares air dew point temperature T4, described automatically controlled temperature T1 and electronic control module setting threshold temperature Ts; S3: as T4 < T1 < TS, second section fluid element aperture remains unchanged; As T1 >=TS, second section fluid element aperture opens △ P; As T1≤T4, second section fluid element aperture closes △ P.
According to the cooling control method of the air-conditioner of the embodiment of the present invention, the temperature of electronic control module can be controlled flexibly in the scope of setting, while to electronic control module cooling, prevent electronic control module from producing condensed water short circuit, improve the reliability of electronic control module, promote the service life of components and parts in electric-controlled box.
Further, in step s3, as T1 >=Ts, after the aperture of the described second section fluid element state opened to maximum Pmax continues very first time T, air-conditioner is shut down and alarm and protection; When the state of T1≤T4 continues, second section fluid element aperture closes △ P, until close completely.
In further embodiment of the present invention, described air-conditioner also comprises the first control valve and the second control valve, described first control valve is connected between one end of the second end of described first refrigerant passage and the 3rd refrigerant passage of automatically controlled heat exchanger, and described second control valve is in parallel with described first control valve and described automatically controlled heat exchanger.
Further, also comprise the steps: in step S3 that open the first control valve, close the second control valve, second section fluid element aperture remains unchanged as T4 < T1 < TS; As T1 >=TS, open the first control valve, close the second control valve, second section fluid element aperture opens △ P; As T1≤T4, open the second control valve, close the first control valve, second section fluid element aperture closes △ P.
Further, as T1 >=Ts, after the aperture of the described second section fluid element state opened to maximum Pmax continues very first time T, air-conditioner is shut down and alarm and protection; When the state of T1≤T4 continues, second section fluid element aperture closes △ P, until close completely.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of air-conditioner according to an embodiment of the invention;
Fig. 2 is the schematic diagram of air-conditioner in accordance with another embodiment of the present invention;
Fig. 3 is the flow chart of the refrigeration control method of air-conditioner according to the specific embodiment of the invention;
Fig. 4 is the dry-bulb temperature of electric-controlled box environment, the relation schematic diagram between wet bulb and dew-point temperature.
Reference numeral:
Air-conditioner 100,
Compressor 1, exhaust outlet a, gas returning port b,
Control valve assembly 2, first interface c, the second interface d, the 3rd interface e, the 4th interface f,
Outdoor heat exchanger 3,
First throttle element 4,
Auxiliary heat exchanger 5, first refrigerant passage 50, second refrigerant passage 51,
Electric-controlled box 6,
Automatically controlled heat exchanger 7, the 3rd refrigerant passage 70,
First temperature-detecting device 8, second temperature-detecting device 9, the 3rd temperature-detecting device 10, first control valve 11, second control valve 12, gas-liquid separator 13, entrance g, outlet h,
Second section fluid element 14, check valve 15, high-pressure stop valve 16, low-pressure shutoff valve 17
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
Below with reference to Fig. 1-Fig. 4, the air-conditioner 100 according to the embodiment of the present invention is described, wherein air-conditioner 100 is air conditioner, air-conditioner 100 has refrigeration mode and heating mode, particularly, air-conditioner 100 comprises indoor set and off-premises station, off-premises station comprises high-pressure stop valve 16 and low-pressure shutoff valve 17, and off-premises station is assembled by the element that high-pressure stop valve 16 is corresponding on indoor set with low-pressure shutoff valve 17 with the assembling completed between off-premises station and indoor set, and indoor set comprises the elements such as indoor heat exchanger.
As depicted in figs. 1 and 2, according to the air-conditioner 100 of the embodiment of the present invention, comprising: compressor 1, control valve assembly 2, outdoor heat exchanger 3, first throttle element 4, auxiliary heat exchanger 5, electric-controlled box 6, automatically controlled heat exchanger 7, first temperature-detecting device 8, second temperature-detecting device 9 and the 3rd temperature-detecting device 10.
Compressor 1 has exhaust outlet a and gas returning port b, it should be noted that, the structure of compressor 1 and operation principle etc. are known by those skilled in the art, are just not described in detail here.
Control valve assembly 2 comprises first interface c, the second interface d, the 3rd interface e and the 4th interface f, one of them conducting in first interface c and the second interface d and the 3rd interface e, another conducting in 4th interface f and the second interface d and the 3rd interface e, first interface c is connected with gas returning port b with exhaust outlet a respectively with the 4th interface f.3rd interface e is connected with the indoor heat exchanger in indoor set.When air-conditioner 100 is in refrigeration mode, first interface c and the second interface d conducting and the 3rd interface e and the 4th interface f conducting.When air-conditioner 100 is in heating mode, first interface c and the 3rd interface e conducting and the second interface d and the 4th interface f conducting.
In examples more of the present invention, as shown in Figure 1, control valve assembly 2 is cross valve.In other examples of the present invention, control valve assembly 2 comprises the first pipeline to the 4th pipeline, first pipeline joins end to end successively to the 4th pipeline, first pipeline is in series with the first magnetic valve, second pipe is in series with the second magnetic valve, 3rd pipeline is in series with the 3rd magnetic valve, 4th pipeline is in series with the 4th magnetic valve, the junction of the first pipeline and second pipe limits first interface c, the junction of the first pipeline and the 4th pipeline limits the second interface d, the junction of the 4th pipeline and the 3rd pipeline limits the 4th interface f, the junction of the 3rd pipeline and second pipe limits the 3rd interface e, first magnetic valve and the 3rd magnetic valve are opened simultaneously or close, second magnetic valve and the 4th magnetic valve are opened simultaneously or close.
One end of outdoor heat exchanger 3 is connected with the second interface d.One end of first throttle element 4 is connected with the other end of outdoor heat exchanger 3.Alternatively, first throttle element 4 is electric expansion valve.Wherein, it should be noted that, first throttle element 4 does not play reducing pressure by regulating flow when refrigeration mode, use of only circulating, and first throttle element 4 just plays the effect of reducing pressure by regulating flow when heating mode.Auxiliary heat exchanger 5 has the first refrigerant passage 50 and the second refrigerant passage 51, the first end of the first refrigerant passage 50 is connected with the other end of first throttle element 4, the first end of the second refrigerant passage 51 is connected with the other end of first throttle element 4 by second section fluid element 14, second end of the second refrigerant passage 51 is connected with gas returning port b, wherein second section fluid element 14 has the effect of reducing pressure by regulating flow and adjust flux, the refrigerant in the first refrigerant passage 50 and the second refrigerant passage 51 is made to have temperature difference by the reducing pressure by regulating flow effect of second section fluid element 14, the refrigerant in the first refrigerant passage 50 and the second refrigerant passage 51 is made to carry out heat exchange.Preferably, second section fluid element 14 is electric expansion valve.Certainly be worth understanding, it can also be the combination of capillary and magnetic valve that the structure of second section fluid element 14 is not limited thereto such as second section fluid element 14, and the effect making second section fluid element 14 not only have reducing pressure by regulating flow also has the effect of adjust flux.
Be provided with electronic control module (scheming not shown) in electric-controlled box 6, electronic control module is electrically connected with compressor 1 and second section fluid element 14.The contiguous electric-controlled box 6 of automatically controlled heat exchanger 7 arranges to carry out heat exchange with electronic control module, automatically controlled heat exchanger 7 has the 3rd refrigerant passage 70, one end of 3rd refrigerant passage 70 is connected with the second end of the first refrigerant passage 50, and the second end of the 3rd refrigerant passage 70 is connected with the indoor heat exchanger in indoor set.
First to the 3rd temperature-detecting device 8-10 is connected with electronic control module respectively, first temperature-detecting device 8 is for detecting the automatically controlled temperature of electronic control module, second temperature-detecting device 9 and the 3rd temperature-detecting device 10 are respectively used to the dry-bulb temperature and the wet-bulb temperature that detect electric-controlled box 6 environment, and wherein electronic control module controls the aperture of second section fluid element 14 according to the testing result of the first to the 3rd temperature-detecting device 8-10.Preferably, the first temperature-detecting device 8, second temperature-detecting device 9 and the 3rd temperature-detecting device 10 are respectively temperature sensor.
Specifically, air-conditioner 100 refrigerating operaton and when needing to carry out radiating and cooling to electronic control module, second section fluid element 14 opens certain aperture.The refrigerant of discharging from compressor 1 enters into outdoor heat exchanger 3 through control valve assembly 2, the refrigerant that heat exchanger 3 is discharged outdoor is divided into two parts after first throttle element 4, part refrigerant enters in the first refrigerant passage 50 of auxiliary heat exchanger 5, another part refrigerant enters in the second refrigerant passage 51 of auxiliary heat exchanger 5 after the reducing pressure by regulating flow of second section fluid element 14, refrigerant in refrigerant in second refrigerant passage 51 and the first refrigerant passage 50 carries out heat exchange, refrigerant heat release cooling in first refrigerant passage 50, refrigerant evaporation heat absorption in second refrigerant passage 51.Refrigerant in first refrigerant passage 50 enters in the 3rd refrigerant passage 70 of automatically controlled heat exchanger 7.Refrigerant in second refrigerant passage 51 is got back in compressor 1.
Enter into refrigerant in the 3rd refrigerant passage 70 of automatically controlled heat exchanger 7 and electronic control module carries out heat exchange to reduce the temperature of electronic control module.Because the refrigerant now entered in the 3rd refrigerant passage 70 is the liquid refrigerants of lowering the temperature through auxiliary heat exchanger 5, the coefficient of heat transfer is high, good effect of heat exchange, can play good cooling effect in automatically controlled heat exchanger 7.
Wherein, what be worth understanding is, when the aperture by controlling second section fluid element 14 makes the flow of the refrigerant entered in the second refrigerant passage 51 become large, then the cooling effect of the refrigerant in the first refrigerant passage 50 is become large, the temperature of the refrigerant in the 3rd refrigerant passage 70 can be lowered into, thus the radiating effect of automatically controlled heat exchanger 7 can be improved.When the aperture by controlling second section fluid element 14 makes the flow of the refrigerant entered in the second refrigerant passage 51 diminish, then the cooling effect of the refrigerant in the first refrigerant passage 50 is diminished, make the temperature of the refrigerant entered in the 3rd refrigerant passage 70 higher, thus the radiating effect of automatically controlled heat exchanger 7 can be reduced.Therefore when the temperature of electronic control module is lower, the aperture of second section fluid element 14 can be reduced to reduce the radiating effect of automatically controlled heat exchanger 7, when the temperature of electronic control module is higher, can by increasing the aperture of second section fluid element 14 to improve the radiating effect of automatically controlled heat exchanger 7.
Carrying out in temperature-fall period to electronic control module thus, first temperature-detecting device 8 detects the automatically controlled temperature T1 of electronic control module, second temperature-detecting device 9 detects the dry-bulb temperature T2 of electric-controlled box 6 environment, 3rd temperature-detecting device 10 detects the wet-bulb temperature T3 of electric-controlled box 6 environment, the air dew point temperature T4 in electric-controlled box 6 can be calculated according to dry-bulb temperature T2 and wet-bulb temperature T3, electronic control module is according to automatically controlled temperature T1, dry-bulb temperature T2 and wet-bulb temperature T3 controls the aperture of second section fluid element 14 to control the flow of the refrigerant entered in the second refrigerant passage 51, namely electronic control module controls the aperture of second section fluid element 14 according to the temperature conditions of self, to adjust the cooling-down effect of automatically controlled heat exchanger 7 pairs of electronic control module, thus avoid the temperature due to automatically controlled heat exchanger 7 too low and cause producing condensed water in electric-controlled box 6.
In concrete examples more of the present invention, the air dew point temperature T4 in electric-controlled box 6 is calculated according to dry-bulb temperature T2 and wet-bulb temperature T3, automatically controlled temperature T1, air dew point temperature T4 and electronic control module setting threshold temperature Ts is compared simultaneously, as T4 < T1 < TS, second section fluid element 14 aperture remains unchanged; As T1 >=TS, second section fluid element 14 aperture opens △ P; As T1≤T4, second section fluid element 14 aperture closes △ P, causes producing condensed water in electric-controlled box 6 to ensure to avoid the temperature due to automatically controlled heat exchanger 7 too low.Wherein, electronic control module setting threshold temperature Ts is the value set according to the actual conditions of electronic control module.What be certainly worth understanding is, air-conditioner 100 according to the embodiment of the present invention can adopt other determination methods, as long as according to automatically controlled temperature T1, dry-bulb temperature T2, wet-bulb temperature T3, electronic control module can judge that the state of temperature of self is to control the aperture of second section fluid element 14 to avoid occurring in electric-controlled box 6 situation of condensed water.
Simultaneously it is also to be appreciated that the computational methods etc. of the air dew point temperature T4 calculated in electric-controlled box 6 according to dry-bulb temperature T2 and wet-bulb temperature T3 are known by those skilled in the art, be just not described in detail here.Such as shown in Figure 4, can calculate the humidity in electric-controlled box 6 according to wet-bulb temperature T3, the relation now between the humidity of electric-controlled box 6 environment, dew-point temperature, dry-bulb temperature as shown in Figure 4.Wherein, the computational methods of the humidity of electric-controlled box 6 environment are calculated according to wet-bulb temperature T3 known by those skilled in the art.
According to the air-conditioner 100 of the embodiment of the present invention, by being provided with auxiliary heat exchanger 5, second section fluid element 14, first temperature-detecting device 8, second temperature-detecting device 9 and the 3rd temperature-detecting device 10, thus electronic control module can control the aperture of second section fluid element 14 according to the testing result of the first to the 3rd temperature-detecting device 8-10, thus control the exothermic temperature of automatically controlled heat exchanger 7, the temperature of electronic control module can be controlled in the scope of setting, ensure that and while lowering the temperature to electronic control module, prevent generation condensed water in electric-controlled box 6 and cause electronic control module short circuit, improve the reliability of electronic control module, improve the service life of the element in electric-controlled box 6.
Describe according to the air-conditioner 100 of the present invention's specific embodiment and the cooling control method of air-conditioner 100 below with reference to Fig. 1, control valve assembly 2 is cross valve.
As shown in Figure 1, air-conditioner 100 comprises compressor 1, cross valve 2, outdoor heat exchanger 3, first throttle element 4, auxiliary heat exchanger 5, electric-controlled box 6, automatically controlled heat exchanger 7, first temperature-detecting device 8, second temperature-detecting device 9, the 3rd temperature-detecting device 10 and gas-liquid separator 13.
Gas-liquid separator 13 has entrance g and outlet h, outlet h is connected with the gas returning port b of compressor 1, gas-liquid separator 13 has the effect of gas-liquid separation, and the refrigerant entered in gas-liquid separator 13 carries out gas-liquid separation, and the gaseous coolant separated is expelled back in compressor 1 from outlet h.Thus compressor 1 can be avoided to occur liquid hit phenomenon by being provided with gas-liquid separator 13.
The first interface c of cross valve 2 is connected with the exhaust outlet a of compressor 1, and the second interface d is connected with the first end of outdoor heat exchanger 3, and the 3rd interface e is connected with low-pressure shutoff valve 17, and the 4th interface f is connected with the entrance g of gas-liquid separator 13.
Second end of outdoor heat exchanger 3 is connected with the first end of first throttle element 4, second end of first throttle element 4 is connected with the first end of the first refrigerant passage 50 of auxiliary heat exchanger 5, the first end of the second refrigerant passage 51 of auxiliary heat exchanger 5 is connected with the second end of first throttle element 4 by second section fluid element 14, and second end of the second refrigerant passage 51 of auxiliary heat exchanger 5 is connected with the entrance g of gas-liquid separator 13.
Second end of the first refrigerant passage 50 of auxiliary heat exchanger 5 is connected with the first end of the 3rd refrigerant passage 70 of automatically controlled heat exchanger 7, and the second end of the 3rd refrigerant passage 70 is connected with high-pressure stop valve 16.
First temperature-detecting device 8 is arranged in electronic control module, detects the temperature T1 of electronic control module in real time.Second temperature-detecting device 9 and the 3rd temperature-detecting device 10 are arranged in the cavity of electric-controlled box 6, detect the dry-bulb temperature in the cavity of electric-controlled box 6 and wet-bulb temperature in real time.
The temperature that first temperature-detecting device 8 detects is T1, and the temperature that the second temperature-detecting device 9 detects is T2, and the temperature that the 3rd temperature-detecting device 10 detects is T3, can calculate air dew point temperature T4 by T2 and T3.
During air-conditioner 100 running refrigerating pattern, second section fluid element 14 opens certain aperture, the part refrigerant of discharging from first throttle element 4 is incorporated in second section fluid element 14 and carries out throttling cooling, refrigerant is evaporation endothermic in the second refrigerant passage 51, and refrigerant is heat release cooling in the first refrigerant passage 50.The refrigerant of discharging from the first refrigerant passage 50 flows through automatically controlled heat exchanger 7, and because the refrigerant of discharging from the first refrigerant passage 50 is the liquid refrigerants through cooling, the coefficient of heat transfer is high, good effect of heat exchange, therefore can play good cooling effect in automatically controlled heat exchanger 7.Second section fluid element 14 controls its aperture size according to T1 temperature, specific as follows:
1) as T4 < T1 < TS, second section fluid element 14 aperture remains unchanged;
2) as T1 >=TS, second section fluid element 14 aperture opens △ P;
3) as T1≤T4, second section fluid element 14 aperture closes △ P.
Wherein, as T1 >=Ts, after the aperture of second section fluid element 14 state opened to maximum Pmax continues very first time T, air-conditioner is shut down and alarm and protection; When the state of T1≤T4 continues, second section fluid element 14 aperture closes △ P, until close completely.
According to the air-conditioner 100 of the embodiment of the present invention, the temperature of electronic control module can be controlled flexibly in the scope of setting, while to electronic control module cooling, prevent electronic control module from producing condensed water short circuit, improve the reliability of electronic control module, promote the service life of components and parts in electric-controlled box 6.
Describe according to the air-conditioner 100 of another specific embodiment of the present invention and the cooling control method of air-conditioner 100 below with reference to Fig. 2, wherein control valve assembly 2 is cross valve.
In this embodiment, be not both with the embodiment shown in Fig. 1, air-conditioner 100 also comprises the first control valve 11 and the second control valve 12, first control valve 11 is connected between the second end of the first refrigerant passage 50 and one end of the 3rd refrigerant passage 70, second control valve 12 is in parallel with the first control valve 11 and automatically controlled heat exchanger 7, and electronic control module and the first control valve 11 are connected with the second control valve 12 running status to control the first control valve 11 and the second control valve 12 according to the testing result of the first to the 3rd temperature-detecting device 8-10.Wherein, first control valve 11 has opening and closed condition, second control valve 12 has opening and closed condition, the running status controlling the first control valve 11 refers to control first control valve 11 and opens or closes, and the running status controlling the second control valve 12 refers to control second control valve 12 and opens or closes.Particularly, the first control valve 11 and the second control valve 12 are respectively magnetic valve.
The arrival end of check valve 15 is connected with the other end of the 3rd refrigerant passage 70, and the second control valve 12 is in parallel with check valve 15, in other words, between the other end that check valve 15 is connected on the 3rd refrigerant passage 70 and high-pressure stop valve 16, and the second control valve 12 is in parallel with check valve 15, first control valve 11 and automatically controlled heat exchanger 7.
During air-conditioner 100 running refrigerating pattern, second section fluid element 14 opens certain aperture, the part refrigerant of discharging from first throttle element 4 is incorporated in second section fluid element 14 and carries out throttling cooling, refrigerant is evaporation endothermic in the second refrigerant passage 51, and refrigerant is heat release cooling in the first refrigerant passage 50.When the first control valve 11 is opened, the refrigerant of discharging from the first refrigerant passage 50 flows through automatically controlled heat exchanger 7, and because the refrigerant of discharging from the first refrigerant passage 50 is the liquid refrigerants through cooling, the coefficient of heat transfer is high, good effect of heat exchange, therefore good cooling effect can be played in automatically controlled heat exchanger 7.The rate-determining steps of electric control module controls first control valve 11 and the second control valve 12 is as follows simultaneously:
1) as T1 >=TS, open the first control valve 11, close the second control valve 12, refrigerant flows through the first control valve 11, automatically controlled heat exchanger 7 and check valve 15, and force cooling electronic control module, second section fluid element 14 aperture opens △ P.
2) as T1≤T4, open the second control valve 12, close the first control valve 11, refrigerant directly by the second control valve 12 to indoor set, now stops the cooling effect of automatically controlled heat exchanger 7, and second section fluid element 14 aperture closes △ P.
3) as T4 < T1 < TS, close the second control valve 12, open the first control valve 11, second section fluid element 14 aperture remains unchanged.
Wherein, as T1 >=Ts, after the aperture of second section fluid element 14 state opened to maximum Pmax continues very first time T, air-conditioner is shut down and alarm and protection; When the state of T1≤T4 continues, second section fluid element 14 aperture closes △ P, until close completely.Wherein, T specifically sets according to actual conditions the very first time.
According to the air-conditioner 100 of the embodiment of the present invention, the temperature of electronic control module can be controlled flexibly in the scope of setting, while to electronic control module cooling, prevent electronic control module from producing condensed water short circuit, improve the reliability of electronic control module, promote the service life of components and parts in electric-controlled box 6.
Below with reference to Fig. 3, the cooling control method according to the air-conditioner of the embodiment of the present invention is described.
Cooling control method according to the air-conditioner of the embodiment of the present invention comprises the steps:
S1: the automatically controlled temperature T1 detecting electronic control module, detect dry-bulb temperature T2 and the wet-bulb temperature T3 of electric-controlled box environment;
S2: calculate air dew point temperature T4 according to dry-bulb temperature T2 and wet-bulb temperature T3, compares air dew point temperature T4, automatically controlled temperature T1 and electronic control module setting threshold temperature Ts;
S3: as T4 < T1 < TS, second section fluid element aperture remains unchanged;
As T1 >=TS, second section fluid element aperture opens △ P;
As T1≤T4, second section fluid element aperture closes △ P.
Wherein be worth understanding, △ P can carry out concrete restriction according to different valve bodies, and such as, in an example of the present invention, △ P is 16P when the valve body of second section fluid element is 480P, is 32P when valve body is 2000P.Simultaneously aforesaid operations interval time is △ T, △ T can be two minutes or other times section.Wherein △ T refers to the duration of each action in step S3 the operating interval time, get back in step S2 after operating interval time △ T, namely after operating interval time △ T, electronic control module calculates air dew point temperature T4 according to dry-bulb temperature T2 and wet-bulb temperature T3 again, and is compared by air dew point temperature T4, automatically controlled temperature T1 and electronic control module setting threshold temperature Ts.
According to the cooling control method of the air-conditioner of the embodiment of the present invention, the temperature of electronic control module can be controlled flexibly in the scope of setting, while to electronic control module cooling, prevent electronic control module from producing condensed water short circuit, improve the reliability of electronic control module, promote the service life of components and parts in electric-controlled box.
In further embodiment of the present invention, also comprise the steps: in step S3
As T4 < T1 < TS, close the second control valve, open the first control valve, second section fluid element aperture remains unchanged;
As T1 >=TS, open the first control valve, close the second control valve, second section fluid element aperture opens △ P;
As T1≤T4, open the second control valve, close the first control valve, second section fluid element aperture closes △ P.Thus electronic control module can be avoided further to produce condensed water short circuit.
Wherein, as T1 >=Ts, after the aperture of the second section fluid element state opened to maximum Pmax continues very first time T, air-conditioner is shut down and alarm and protection; When the state of T1≤T4 continues, second section fluid element aperture closes △ P, until close completely.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (12)
1. an air-conditioner, is characterized in that, comprising:
Compressor, described compressor has exhaust outlet and gas returning port;
Control valve assembly, described control valve assembly comprises first to fourth interface, one of them conducting in described first interface and described second interface and described 3rd interface, another conducting in described 4th interface and described second interface and described 3rd interface, described first interface is connected with described gas returning port with described exhaust outlet respectively with described 4th interface;
Outdoor heat exchanger, one end of described outdoor heat exchanger is connected with described second interface;
First throttle element, one end of described first throttle element is connected with the other end of described outdoor heat exchanger;
Auxiliary heat exchanger, described auxiliary heat exchanger has the first refrigerant passage and the second refrigerant passage, the first end of described first refrigerant passage is connected with the other end of described first throttle element, the first end of described second refrigerant passage is connected by the other end of second section fluid element with described first throttle element, and the second end of described second refrigerant passage is connected with described gas returning port;
Electric-controlled box, is provided with electronic control module in described electric-controlled box, and described electronic control module is electrically connected with described compressor and described second section fluid element;
Automatically controlled heat exchanger, the contiguous described electric-controlled box of described automatically controlled heat exchanger is arranged to carry out heat exchange with described electronic control module, and described automatically controlled heat exchanger has the 3rd refrigerant passage, and one end of described 3rd refrigerant passage is connected with the second end of described first refrigerant passage;
First to the 3rd temperature-detecting device, described first to the 3rd temperature-detecting device is connected with described electronic control module respectively, described first temperature-detecting device is for detecting the automatically controlled temperature of described electronic control module, described second temperature-detecting device and described 3rd temperature-detecting device are respectively used to the dry-bulb temperature and the wet-bulb temperature that detect described electric-controlled box environment, and wherein said electronic control module controls the aperture of described second section fluid element according to the testing result of the described first to the 3rd temperature-detecting device.
2. air-conditioner according to claim 1, it is characterized in that, also comprise the first control valve and the second control valve, described first control valve is connected between the second end of described first refrigerant passage and one end of described 3rd refrigerant passage, described second control valve is in parallel with described first control valve and described automatically controlled heat exchanger, and described electronic control module and described first control valve are connected with described second control valve the running status to control described first control valve and described second control valve according to the testing result of the described first to the 3rd temperature-detecting device.
3. air-conditioner according to claim 2, is characterized in that, described first control valve and described second control valve are respectively magnetic valve.
4. air-conditioner according to claim 1, it is characterized in that, also comprise gas-liquid separator, described gas-liquid separator has entrance and import, described entrance is connected with the second end of described second refrigerant passage with described 4th interface, and described outlet is connected with described gas returning port.
5. air-conditioner according to claim 1, is characterized in that, described control valve assembly is cross valve.
6. air-conditioner according to claim 1, is characterized in that, described first throttle element is electric expansion valve, and described second section fluid element is electric expansion valve.
7. air-conditioner according to claim 2, is characterized in that, also comprises check valve, and the arrival end of described check valve is connected with the other end of described 3rd refrigerant passage, and described second control valve is in parallel with described check valve.
8. the cooling control method of an air-conditioner, it is characterized in that, described air-conditioner comprises auxiliary heat exchanger, first throttle element and second section fluid element, described first throttle element is connected with the first refrigerant passage of described auxiliary heat exchanger, described second section fluid element is connected between the second refrigerant passage of described first throttle element and described auxiliary heat exchanger, and described cooling control method comprises the steps:
S1: the automatically controlled temperature T1 detecting electronic control module, detect dry-bulb temperature T2 and the wet-bulb temperature T3 of electric-controlled box environment;
S2: calculate air dew point temperature T4 according to described dry-bulb temperature T2 and wet-bulb temperature T3, compares air dew point temperature T4, described automatically controlled temperature T1 and electronic control module setting threshold temperature Ts;
S3: as T4 < T1 < TS, second section fluid element aperture remains unchanged;
As T1 >=TS, second section fluid element aperture opens △ P;
As T1≤T4, second section fluid element aperture closes △ P.
9. the cooling control method of air-conditioner according to claim 8, is characterized in that, in step s3, as T1 >=Ts, after the aperture of the described second section fluid element state opened to maximum Pmax continues very first time T, air-conditioner is shut down and alarm and protection; When the state of T1≤T4 continues, second section fluid element aperture closes △ P, until close completely.
10. the cooling control method of air-conditioner according to claim 8, it is characterized in that, described air-conditioner also comprises the first control valve and the second control valve, described first control valve is connected between one end of the second end of described first refrigerant passage and the 3rd refrigerant passage of automatically controlled heat exchanger, and described second control valve is in parallel with described first control valve and described automatically controlled heat exchanger.
The cooling control method of 11. air-conditioners according to claim 10, is characterized in that, also comprise the steps: in step S3
As T4 < T1 < TS, open the first control valve, close the second control valve, second section fluid element aperture remains unchanged;
As T1 >=TS, open the first control valve, close the second control valve, second section fluid element aperture opens △ P;
As T1≤T4, open the second control valve, close the first control valve, second section fluid element aperture closes △ P.
The cooling control method of 12. air-conditioners according to claim 11, is characterized in that, as T1 >=Ts, after the aperture of the described second section fluid element state opened to maximum Pmax continues very first time T, air-conditioner is shut down and alarm and protection; When the state of T1≤T4 continues, second section fluid element aperture closes △ P, until close completely.
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