TW565676B - System for controlling starting of air conditioner and control method thereof - Google Patents

Abstract

Disclosed herein is a system for controlling the starting of an air conditioner. The air conditioner of the present invention includes a compressor controlled in a pulse width modulation manner according to a duty control signal, an electronic expansion valve for expanding refrigerant compressed in the compressor, a high pressure conduit connecting the exit side of the compressor and the inlet side of the electronic expansion valve, a low pressure conduit connecting the exit side of the electronic expansion valve and the inlet side of the compressor, a bypass conduit connected at its first end to the high pressure conduit and at its second end to the low pressure conduit, and a flow rate regulating valve mounted on the bypass conduit for regulating a flow rate of fluid flowing through the bypass conduit. A control unit controls the compressor during the starting of the compressor in such a way that the electronic expansion valve is opened, the flow rate regulating valve is opened and a duty control signal shorter than a duty control signal for a normal operation is generated. The bypass conduit may be a vent bypass conduit connecting the receiver and the upstream side of the accumulator, or a hot gas bypass conduit connecting a high pressure conduit situated between the compressor and the condenser and the accumulator. The flow rate regulating valve is a vent valve mounted on the vent conduit, or a hot gas valve mounted on the hot gas bypass conduit.

Description

565676 A7 B7 V. Description of the invention (1) The present invention relates to an air conditioner, and more particularly, to a system and a control method for controlling the startup of an air conditioner using a pulse width modulation compressor.

[Knowledge Technology I] As the scale of buildings becomes larger and larger, consumers ’demand for multi-air conditioners is increasing. With this multi-air conditioner system, multiple indoor units (indoor unit) is connected to a single outdoor unit. Because the distance between the outdoor unit and the indoor unit in such multiple air conditioners is quite large, the long refrigerant conduits are used to connect between the indoor unit and the outdoor unit. In addition to the need to fill more refrigerant in these cold agent tubes, the refrigerant may enter the compressor during the startup of the air conditioner. More specifically, 'when the power supplied to any house saponin is interrupted during the operation of the air conditioner, the possibility that the cooling beam agent enters the compressor will increase. If the remote controller is not used, if the power of the unit in the house is interrupted improperly during operation, based on the _electronic expansion valve (electronic expansion valve) supplied to the unit in the house The power system is cut off, and the electronic expansion valve will not be closed for this reason. Therefore, in a non-evaporated state, the high-pressure liquid cold inside the refrigerant conduit located between the condenser and the electronic expansion valve; the east agent is passed through the electronic expansion valve and the evaporator. Into the compressor. The above phenomenon will continue to reach the high-pressure side and the low-pressure side, ------------ 1 (Please read the precautions on the back before filling this page)

Order ---- ^ ---- Line II Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Moderate Rule Paper Size A4 S) A N (c

565676 V. Description of the invention (2) At this time, the liquid refrigerant entering the compressor will be mutually mixed with the oil contained in the compressor. The oil concentration in the compressor is because The dilution effect of the liquid cooling bundle agent is reduced, so that the lubrication effect between the friction elements in the compressor is deteriorated, and the compressor is damaged. In addition, a large cooling capacity is required for the multi-air conditioner, and the required cooling capacity is also changed frequently in the case where the units in each room are frequently turned on / off. In order to meet the above demand ', a variable rotation number compressor with a large and variable load is used in this multi-air conditioner. The load of the variable speed compressor can be appropriately adjusted according to the change of the required cooling amount. The method is to change the load applied to a motor (m.o.) by an inverter control method. t〇r), so that the speed of the motor can be controlled. However, since the rotation of the motor in the conventional variable speed compressor must be directly controlled according to the required amount of cooling, so that the motor cannot effectively respond to the required response and accuracy (precisi On) to control the number of revolutions. In addition, as the number of revolutions of the motor changes frequently, vibration and noise are generated, which will reduce the life span (Hfe span) of the motor and the compressor and reduce the overall mechanical reliability. Furthermore, the necessary circuit device of the variable revolution type compressor is an expensive device with a complicated structure, and the variable revolution type compressor can change the frequency of the current applied to the motor by a large power consumption. The performance of the variable speed compressor will be significantly lower than that of a general compressor. More special ------------- 1 (Please read the notes on the back before filling this page)

Order ----------- Line J Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 6 565676 A7

V. The description of the invention (3) is that 'in the variable revolution type compressor, the commercial AC power input must be converted into DC power first, and the DC power is converted into converters by converters. The AC power with the required frequency will make the structure of the circuit device of the variable speed compressor quite complicated, and noise will be generated frequently in the circuit device. In addition, the variable-revolution-type compressor with large load has problems such as difficulty in controlling the compressor, low efficiency of the compressor, too large size of the compressor, and high cost of the compressor. The machine is not suitable for operations with large loads. Generally speaking, operations under heavy load conditions are mostly performed by using two or more compressors, and in this example, the variable revolution type compressor and a standard compressor are used at the same time. Among them, The motor used in the standard compressor is rotated at a constant speed. When multiple compressors are used, the overall size of the outdoor unit increases, which makes it more difficult than the operation of the outdoor unit. Related to a pulse width modulated compressor is disclosed in U.S. Patent No. 6,047,557 and Japanese Unexamined Patent Publication No. Hei 8-334094. The compressors used in these cold cooling systems include a plurality of freezing compartments or refrigerating compartments, and the above-mentioned design is used to shorten the piping in the refrigeration system. Among them, the refrigerant conduits between the compressor and the evaporator have a relatively short distance. As long as the air-conditioning system in the building must use long pipelines, and the control environment between these air-conditioning systems and the refrigeration system, this paper standard applies to China National Standard (CNS) A4 specification (21〇X 297 public love ) (Please read the notes on the back before filling out this page) t Order—l · ---- line · Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

t (Please read the precautions on the back before filling out this page) Order ----------- Line J Printed by the Consumer Consumption Cooperative of the Intellectual Property Bureau of the Ministry of Economy 565676 A7 I --------- --- 5. The description of the invention (4) is also different, so these compressors cannot be used in the air-conditioning systems of these buildings. In addition to the control system and control method for the pulse wave I width modulation compressor in the air conditioner in the conventional technology, how to quickly and safely perform the air conditioner through a control system and control method To start the job. In view of this, the purpose of the air conditioner start-up control system and control method of the present invention is to improve the conventional technology described above, and use the control system and control method to quickly and safely start the air conditioner. The present invention uses a pulse width modulation compressor in the air conditioner start-up control system and control method thereof. The purpose is to prevent the refrigerant from entering the air conditioner during the startup operation of the air conditioner by using the pulse width modulation compressor. Compressor. In order to achieve the above object, the present invention provides a system for controlling the startup of an air conditioner. The air conditioner startup control system includes a compressor that is controlled by a pulse width according to a work control signal. Modulation method; an electronic expansion valve, which is used to expand the refrigerant compressed in the compressor; a high-pressure conduit, which is connected to the outlet side of the compressor and the electronic expansion valve Inlet side; a low-pressure conduit connected between the outlet side of the electronic expansion valve and the inlet side of the compressor; a bypass conduit having a first end and a second end, the first One end is connected to the high-pressure duct, and the second end is connected to the low-pressure duct; a first rate control valve, the flow rate adjustment valve is disposed on the bypass duct, and the flow rate adjustment valve is used for Adjust the flow rate of the fluid flowing through the bypass duct; and a control unit, the control sheet I____ 8 This paper size is applicable to the Chinese National Standard (CNS) A4 specification ⑵G χNuo Chu Chu 5. Invention Explanation (5) The element is used to control the electronic expansion valve, the flow rate regulating valve, and the compressor during the startup operation of one of the compressors, and the flow rate regulating valve system is in a closed state during the startup operation. The flow rate regulating valve is in an open state, the compressor is controlled by a working control signal, and the working control signal is shorter than a working control signal of a normal operation. In addition, the invention also provides a system for controlling the startup of an air conditioner. The air conditioner startup control system includes a compressor that is controlled by a pulse width modulation method according to a working control signal. An electronic expansion valve, which is used to expand the refrigerant compressed in the compressor; a high-pressure conduit, which is connected to the outlet side of the compressor and the inlet side of the electronic expansion valve A low-pressure conduit connected between the outlet side of the electronic expansion valve and the inlet side of the compressor; a bypass conduit having a first end portion and a first end portion, the first end The system is connected to the high-pressure pipe, and the second end is connected to the low-pressure pipe; the first rate control valve, the flow rate adjustment valve is disposed on the bypass pipe, and the flow rate adjustment valve is used to regulate The flow rate of the fluid through the bypass duct; and a control unit for controlling the flow rate regulating valve, the electronic expansion valve, the pressure during the start-up operation of one of the compressors The compressor is controlled so as to prevent refrigerant from entering the compressor. Furthermore, the present invention provides a method for controlling the start-up of an air conditioner. The control method includes the following steps: according to a working control signal to determine whether to output a starting signal to a pulse-width modulation method controlled by x output. The following one I shrink; and when the start signal is input, the electronic 9 paper size is closed χ 297 mm) 565676 A7 B7 _ V. Description of the invention (6) When the expansion valve is opened and the flow rate adjustment is turned on The valve operation is performed for the compressor for a predetermined time. The flow rate adjustment valve is disposed above the bypass duct, and the bypass duct is connected to the outlet side and the inlet side of the compressor. Brief description of the enclosure type. The first diagram is a cycle diagram showing a control system for controlling the starting of an air conditioner according to the present invention, and the second diagram is a pulse width of the air conditioner. A sectional view of a pulse-width modulated compressor in a loading state; Figure 2b shows the pulse-width modulated compressor in the air conditioner in an unloading state Section 3; Figure 3 is a diagram showing the relationship between the loaded state, the unloaded state, and the discharge of a refrigerant during the operation period of the compressor shown in Figures 2a and 2b; FIG. 4 is a block diagram showing a control system for controlling the startup of an air conditioner according to the present invention; and FIG. 5 is a diagram showing a control system for controlling an air conditioner according to the present invention ( A flowchart of a control method for starting the air conditioner). DESCRIPTION OF SYMBOLS 1 ~ Air conditioner; 10 ~ Pressure accumulator; 11 ~ Collector; 12 ~ Ventilation bypass duct; 13 ~ Ventilation valve; 14 ~ Hot gas bypass duct; 10 This paper size applies to Chinese National Standard (CNS) A4 Specifications (21〇X 297) ------------ 1 (Please read the precautions on the back before filling this page)

Order ----, ---- Line II Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 565676 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 16 ~ Hot gas valve; 18 ~ Inlet; 2 ~ Compressor; 21 ~ Motor; 23 ~ compression chamber; 25 ~ bypass duct; 27 ~ outdoor control unit; 29 ~ indoor control unit; 30 ~ temperature detection unit; 32 ~ indoor communication circuit unit; 34 ~ condenser temperature sensor; 5 ~ house heat exchanger; 7 ~ low pressure duct; 9 ~ house unit. A7 B7 V. Description of the invention (7) 15 ~ liquid bypass conduit; 17 ~ liquid valve; 19 ~ outlet; 20 ~ housing; 22 ~ rotatable scroll; 24 ~ stationary scroll; 26 ~ PWM valve; 28 ~ outdoor communication circuit unit 3 ~ outdoor heat exchanger; 31 ~ temperature setting unit; 33 ~ compressor temperature sensor 4 ~ electronic expansion valve; 6 ~ high pressure conduit; 8 ~ outdoor unit; the embodiment is to make the present invention The foregoing objects, features, and advantages can be more clearly understood, and a preferred embodiment is hereinafter described in detail with reference to the accompanying drawings. In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is given below in conjunction with the accompanying drawings for detailed description as follows. Fig. 1 is a diagram of a system cycle for controlling the starting of an air conditioner 1. The air conditioner 1 of the present invention includes a compressor, a condenser 3, and a plurality of electronic expansions 11. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) --- ----------------- Order --------- line! (Please read the Zhuyin on the back? Matters before filling out this page) 565676 A7

V. Description of the invention (8) The valve (electronic expansion valve) 4 and the plurality of evaporators (5), the above-mentioned before and after devices are connected by a plurality of refrigerating conduits to form a closed type cooling Beam circuit (closed refrigerating circuit). One of the refrigerant conduits used to connect the outflow side of the compressor 2 to the inflow side of the electronic expansion valve is a high pressure conduit. 6, the high-pressure pipe 6 can guide the high-pressure refrigerant discharged from the compressor 2; used to connect the outflow side of the electronic expansion valve 4 to one of the inflow side of the compressor 2; The agent conduit is a low pressure conduit 7 through which the low-pressure refrigerant expanded through the electronic expansion valve 4 is guided. The condenser 3 is located above the high-pressure duct 6 and the evaporator 5. When the compressor 2 is in an operating state, the refrigerant flows in solid arrow directions. In addition, the air conditioner 1 includes an outdoor unit 8 and a plurality of indoor units 9, wherein the outdoor unit § is mainly composed of the compressor 2 and the condenser 3. In addition, the outdoor unit 8 further includes an accumulator 10 and a receiver 11, wherein the accumulator 10 is disposed upstream of the low-pressure pipe 7 of the compressor 2, and the collector The device u is disposed downstream of the high-pressure duct 6 of the condenser 3. The function of the pressure accumulator 10 is to collect and evaporate the liquid refrigerant that has not been evaporated, and to allow the evaporated refrigerant to flow to the compressor 2. If the refrigerant in the evaporator 5 has not completely evaporated, the refrigerant entering the pressure accumulator 10 will be liquid and gas ------------- 鼋 (Please read the note on the back first咅? Please fill out this page again)

Order ----- 1 '---- Line II Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 12 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 565676 A7 B7 V. Description of the invention (9) Blending cold; East agent. After the liquid cold rolling agent is evaporated by the storage H), a gaseous cooling agent (coolant agent gas Dorajialiu) can be allowed to enter the compressor 2. In order to achieve the above purpose, the cooling agent agent tube The inlet and outlet ends are preferably placed on top of the accumulator 10 (portion). If the refrigerant in the condenser 3 is not completely condensed, the cold that enters the collector 11 is made into a liquid-gas mixed cold head. The purpose of this collector is to separate the liquid refrigerant from the gaseous refrigerant ', so that only the liquid refrigerant in the liquid-gas mixed cold wire can be discharged. In order to achieve this purpose, the cooler located inside the collector u; the person and outlet end of the east agent duct preferably extend to the lower portion of the collector U. A vent bypass conduit 12 connects the collector 11 to the upstream of the low-pressure conduit 7 of the pressure accumulator 10, so that the gaseous refrigerant collected in the collector n can be carried out. Bypass drainage. The inlet end of the ventilation bypass duct 12 is located on the top of the collector u, so that only the gaseous refrigerant can enter the ventilation bypass duct 12. A vent valve 13 is provided on the ventilation bypass duct 12. The vent valve 13 is used to control the im »speed of the gaseous frozen BM bypassed by drainage. The double dotted arrows indicate the flow direction of the gas separation and refrigerant in the ventilation bypass duct 12. Part of the position of the south pressure conduit 6 extending from the collector 11 is through the pressure accumulator 10, so that the refrigerant having a relatively high temperature can be passed through the high pressure conduit 6 to the pressure accumulator 10. Liquid paper with low temperature is suitable for ffl Chinese National Standard (CNS) A4 specification (210 X 297)

5. Description of the invention (10) The refrigerant is evaporated. In order to effectively vaporize the liquid refrigerant, a part of the structure of the low-pressure pipe 7 in the pressure accumulator 10 has a u-shaped portion, and the part of the high-pressure pipe 6 that will pass through the pressure accumulator 10 The structure is positioned inside the low-pressure duct 7-1; In addition, the outdoor unit 8 further includes a hot gas bypass duct (gas bypass c0ndiiit) 14 and a liquid bypass duct (liquid to egg "ccmduit) 15, wherein the hot gas bypass duct 14 is used to place the hot gas bypass duct 14 The high-pressure pipe 6 between the compressors 2 and 4 and the condenser 3 is partially connected to the pressure accumulator 10, and the liquid bypass pipe 15 is used to connect downstream of the collector 11 and the pressure accumulator 10 Upstream. A hot gas valve (6) is provided on the hot gas bypass pipe (14), and the hot gas valve (16) is used to control the flow rate of the hot gas that is bypassed, and is located next to the hot gas. There is no liquid valve (HqUid vaive) i7 on the through pipe 14. The liquid valve 17 is used to control the flow rate of the liquid refrigerant that is bypassed. Therefore, when the hot gas valve 16 is open, the compression is performed by the compression The part discharged by the machine 2 is hot gas and moves along the hot gas bypass conduit 14 in the direction of the dotted arrow in the first figure; when the liquid valve 17 is open, the The part of the liquid refrigerant discharged from the collector 11 is The double-pointed arrow in Fig. 1 moves along the liquid bypass duct 15. The above-mentioned plural indoor units 9 are arranged in parallel, and each of the indoor units 9 includes an electronic expansion valve 4 and an evaporation. 5. Therefore, multiple indoor units 9 are connected to the outdoor unit 8 and each house 565676 printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (ll) The capacity and shape of the internal unit 9 can be completely Consistently or by other methods. Each compressor 2 shown in Figures 2a and 2b is a variable load that can be controlled by a pulse width modulation method Variable capacity compressors. The compressor 2 includes a casing 20, a motor 21, a rotating scroll 22, and a stationary scroll. 24. An inlet 18 and an outlet 19 are formed in the casing 20, the motor 21 is disposed in the casing 20, and the rotatable scroll 22 is formed by the motor. Turning power of 21 It rotates, and a compression chamber 23 is defined by the stationary scroll 24 and the rotatable scroll 22 at the same time. A bypass duct 25 is attached to the casing 20, and The bypass conduit 25 connects a position above the stationary scroll 24 to the inlet 18, and a PWM valve (Pulse Width Modulated Valve) 26 is mounted on the bypass conduit 25, wherein the PWM valve 26 is a solenoid valve. In Fig. 2a, the PWM valve 26 is in the closed state, the bypass duct 25 is closed by the PWM valve 26, and the refrigerant is discharged by the compressor 2 system. This state is called a "loading state", in which the compressor 2 is operated with a load of 100%. In FIG. 2b, the PWM valve 26 is in an ON state, and the bypass duct 25 is opened by the PWM valve 26. At this time, the compressor 2 does not discharge the refrigerant. This state is called the "unloading state", in which the compressor 2 is 0% 15 paper standards that apply the Chinese National Standard (CNS) A4 specification (210 X 297 meals) I- ----------- r --------- ^ i ^ w— (Please read the notes on the back before filling in this page) 565676 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Invention description (12) The operation is performed under the load. Whether under load or under load, power is supplied to the compressor 2 and the motor 21 is rotated at a constant speed. When When the power supply to the compressor 2 is stopped, the motor 21 is stopped, and the compressor 2 is also stopped. The compressor 2 in FIG. 3 is performed in a periodic manner under a loaded and unloaded state. Operation, in which the load and non-load time are changed according to the required cooling capacity. Under the load state, since the compressor 2 is for discharging refrigerant, the temperature of the evaporator 5 will be at Continuous decrease during load time; under non-load condition Since the compressor 2 does not discharge the refrigerant, the temperature of the evaporator 5 will continue to increase during the load time. In Figure 3, the hatched portions indicate the amount of cold air emitted and are used to The signals for controlling the load and non-load time are called duty control signals. It can be known in the preferred embodiment of the present invention that the load and non-load time are based on the total cooling required by the compressor 2 The load of the compressor 2 is changed according to this method, for example, each cycle period is maintained at 20 minutes. Fig. 4 shows how to control the startup of an air conditioner according to the present invention. The block diagram of the control system. The outdoor unit 8 in the figure includes an outdoor control unit 27. The outdoor control unit 27 is connected to the compressor 2 and the PWM valve 26. The outdoor control unit 27 is used to transmit and receive related signals. In addition, the outdoor control unit 27 is connected to an outdoor communication circuit unit (outdoor communication circuit unit) unit) 28, so through this outdoor communication 16 paper sizes are applicable to China National Standard (CNS) A4 specifications (210 X 297 public love) -------------------- Order " ---- * ----- line (please read the precautions on the back before filling this page) 565676 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of Invention (13) Circuit The unit 28 transmits and receives related signals, and if necessary, the outdoor control unit 27 can be connected to the ventilation valve 13, the hot gas valve 16 and the liquid valve 17, so that the outdoor control unit 27 can be used to Controls the operation of these valves. Each of the indoor unit 9 series includes an indoor control unit 29, an indoor control unit 30, a temperature detecting unit 30, and a temperature setting unit 31, which are connected to the indoor control unit 29. Input port, and the electronic expansion valve 4 is connected to the output port of the indoor control unit 29. The temperature detecting unit 30 is a temperature sensor. The temperature detecting unit 30 is used to sense the indoor temperature of a room in the air conditioner. Each indoor unit 9 series includes an indoor communication circuit unit 32, wherein the indoor communication circuit unit 32 is connected to an indoor control unit 29 and the outdoor unit 8, so that it can be borrowed The indoor communication circuit unit 32 transmits and receives related signals. The functions of the outdoor communication circuit unit 28 and the indoor communication circuit unit 32 are for transmitting and receiving data in a wired or wireless manner. The operation of the compressor 2 of the present invention is divided into a normal operation and a starting operation. After power is applied to the compressor 2 and the start-up operation of the compressor 2 is completed, the normal operation designates the compressor 2 to operate according to a required cooling amount transmitted by the indoor unit 9. When a starting signal is transmitted to the compressor 2, the starting operation will start the compressor 2. 17 This paper size is applicable to the Chinese National Standard (CNS) A4 specification ⑵〇x 297 issued) '-------------------------- line (please read the notes on the back before filling out this page) 565676 Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printing A7 B7 V. Description of the invention (14) Operation. In the normal operation mode, the indoor control unit 29 is used to receive signals from the temperature detection unit 30 and the temperature setting unit 31, and the indoor control unit 29 is based on the indoor temperature and a preset temperature (Preset temperature) difference to calculate the required cooling amount of the unit 9 in the house. In addition, each indoor control unit 29 has its own cooling unit information (information), so that based on the difference between an actual temperature and a preset temperature, each indoor control unit 29 in its own house The cooling amount of the unit is used to calculate the required cooling amount of the unit 9 in each house. The required cooling amount of each indoor unit 9 calculated in the above manner is transmitted to the outdoor control unit 27 via the outdoor communication circuit unit 28 and the indoor communication circuit unit 32. The total required cooling capacity calculated by the outdoor control unit 27 is the sum of the required cooling capacities of all the indoor units 9. The compressor 2 is operated interactively between the load time and the non-load time, wherein the load time and the non-load time are determined by the total required cooling capacity. / V Please refer to FIG. 5. In FIG. 5, a description is given of a pressure balancing process performed before a starting operation and the starting operation. First, the outdoor control unit 27 determines whether or not to stop the compressor 2 (S101). If the compressor 2 is stopped, the electronic expansion valve 4 and the air valve 13 are fully opened (S102 and S103). At this time, it is determined by whether 30 seconds have passed (S104). If 30 seconds have passed, 18 paper sizes are applicable to China National Standard (CNS) A4 (21〇X 297 public love) -------------------- Order- ------- Line (Please read the precautions on the back before filling this page) 565676 A7 B7 V. Description of the invention (15) The hot gas valve 16 (S104) can be opened. Subsequently, after the opening of the hot gas valve 16 is completed, it is determined at this time by whether or not 2 minutes have elapsed (S105, 3 minutes after the electronic expansion valve 4 and the vent valve 13 are opened). Alas. If 2 minutes and 30 seconds have elapsed, the expansion valve 4, the vent valve 13, and the hot gas valve 16 can be closed for the electronic expansion (§106). As for the reason why the 3-minute pressure equalization procedure is performed: the high and low pressures are balanced during the cycle, so as to reduce the starting load at the beginning of the start. It can be known from this embodiment that the balance between the high and low pressures in the circulation process needs to be continued for 3 minutes, but for specific systems, there is a corresponding equilibrium time. A description will be given below regarding the start-up operation which is operated under the control of the outdoor control unit 27. First, a decision is made as to whether or not one of the compressor 2 start signals is input (s108). If the start signal has been input, the compressor 2 series is in operation, and the bank member, the expansion I 4 series is in, and the leg system is in the on state (S109). After the setting, the period of the work control signal used to control the compressor 2 in this embodiment is smaller than the period of the work control signal under normal operation. The reason is that if the compressor 2 is under normal operation, When the operation is performed periodically, the pressu ^ fluctuation will increase, which will reduce the reliability of the compressor 2 and increase the difficulty of safe starting of the compressor 2. In addition, when the normal operation period has a longer non-load time, the compressor 2 needs to take a longer time to start; when it has a longer load time, in addition to the pressure drop of the paper Standards are applicable to China National Standard (CNS) A4 specifications ⑵Q x 297 public love) ----------------- ^ — 0 (Please read the precautions on the back before filling this page) 565676 A7

(Please read the precautions on the back before filling this page) In addition to the increase in pressure drop, the liquid is cold; the agent will also flow from the accumulator to the compressor 2. If the load time is determined with a relatively small value, and the compressor 2 is frequently operated under load, this will enable the start-up operation of the compressor 2 to be completed quickly and safely. In this embodiment, the cycle of the start-up operation is 20-80% of the cycle under the normal operation, and the cycle of the start-up operation is preferably 50% of the cycle under the normal operation. For the reason that the minimum limit of the start-up cycle is set to 20% ... The load time and non-load time are set for the second time, and the degree of reduction of the minimum limit is limited. For the reason that the maximum limit of the start-up cycle is set to 80% ... If the maximum limit of the start-up cycle exceeds, the cycle reduction method will hardly achieve any effect. Therefore, when the period of the normal operation is 20 seconds, the period of the start operation is 2-16 seconds, and 10 seconds is more preferable. During the start-up operation of the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the compressor was operated under a modulation of 20-50%. Among them, 20% of the modulation indicates the operating system of the compressor. Interact between two-second loading time and two-second unloading time of 8 seconds. A modulation of 50% indicates that the operation of the compressor is five-second loading time. loading time) and five-second unloading time. However, the period of the start-up operation mentioned above is preferably 50% of the period under the normal operation. In this example, the load time and non-load time of the compressor's start-up operation. The paper size is suitable for financial ® ® Home Standard (CNS) A4 specification (21G X 297 public love). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 565676 A7 ---------— B7___ V. Description of Invention (17) The ratio between ^ is 7: 3. The reason why the start-up operation uses 50% modulation at most is because the start-up operation is not a normal operation, so it will limit the increase in modulation, and because the start-up and rotation (low: emploture starting) is started at a low temperature. The increase in modulation under ompem) will result in a considerable pressure drop, which will cause a reduction in the reliability of the compressor. ^ During the first-stage start-up operation, the reason for the electronic expansion valve 4 miw and the color house is to avoid the liquid condensate contained in the collector Ti, the evaporator 5 and passing through the condenser 3. (Hquid refrigerant) flows into the accumulator in one operation, or flows into the compressor 2 in subsequent operations. In addition, since all the electronic expansion valves 4 are closed, the low-pressure condensing system located between the evaporator 5 and the compressor 2 can flow into the compressor 2 quickly after the startup is completed quickly. And, the compressor 2 performs compression and discharge operations. When all the electronic expansion valves 4 are closed and the operation of the compressor 2 is performed, the pressure value of the refrigerant between each of the electronic expansion valves and the compressor 2 will be greatly reduced, and the circulation of the refrigerant will be greatly reduced. The operation cannot be carried out smoothly ', which will cause the compressor 2 to overheat. In order to solve the above problem, it is possible to open more than one Zhao 5 if appropriate. Open the reference gas and valve 1 so that the outlet side of the compressor 2 is connected to the pressure accumulator one by one) one: '.... ........................ 10 of the upstream positions The low-pressure pipe 7 is such that part of the hot gas can enter the pressure accumulator 10. In addition to avoiding an excessive drop in the pressure of the condensate in the pressure accumulator 10, the compressor 2 can also be used in a normal manner. 21 This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 public love) ^ w > Μ -------- ^ —------- (Please read the precautions on the back before (Fill in this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 565676 A7 B7_ V. Description of the invention (18) Operation under the conditions. In addition, when all electronic expansion valves 4 are closed, the circulation of the condensate will be affected, so that the condensate condensed in the condenser 3 cannot flow into the collector 11 quickly. Therefore, when the gas V in the collector 11 is opened by the opening of the vent valve 1β, the condensate is discharged to the low-pressure side, and the liquid is in a liquid state. The refrigerant can then be allowed to flow into the collector 11. When the degree of overheating of the refrigerant sucked by the compressor 2 is high and liquid refrigerant needs to be replenished, the liquid valve 17 must be opened. In step 108, the operation is continued for about 1-5 minutes, of which 1 minute is preferred. At this time, it can be determined by whether the operation in step 108 has exceeded 1 minute (S109). If step 108 has exceeded 1 minute, the start operation is stopped at this time; if step 108 does not exceed 1 minute, the start operation is continued. In addition to determining the start time of the start operation, in addition to the target value of the start operation, the start time of the start operation must be able to quickly start a cooling operation. When safe start-up is the main consideration, this allows the start-up operation to be performed in a sufficient amount of time. Therefore, under the above-mentioned operating conditions, the safe operation or the cooling operation is performed in a delayed manner. Although the start-up operation time is 1 minute in this embodiment, if the safe operation is continued and the cooling operation is slightly delayed, the start-up operation time may be 5 minutes. Industrial Applicability 22 This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) One ----------- • -Packing -------- Order --- (Please read the precautions on the back before filling this page) # 565676 A7 B7 V. Description of the invention (i 9) Based on the above information, the present invention discloses a control system and a control method for starting an air conditioner. The system adopts -pulse width modulation, and can control its electronic expansion valve, the hot gas valve and the ventilation ~, so that the startup operation of the air conditioner can be completed under fast and safe conditions 4 In addition, under the action of the air conditioner start-up control system and control method of the present invention, the compressor will not cause the phenomenon of inflow of condensate in the operating state. (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 3 2 This paper size applies to China National Standard (CNS) A4 (210 X 297 cm)

Claims (1)

565676 patent application method; 1. An air conditioner start-up control system, including a compressor, which is controlled by a pulse width electronic swell valve according to a working control signal, and is used for the compressor. The compressed refrigerant is expanded; the pressure guide is connected to the outlet side of the compressor and the inlet side of the electronic expansion chamber; the low pressure guide is connected to the outlet side of the electronic expansion valve and the inlet side of the compressor; The A-side communication guide has a first end and a second end, and the first end is connected to the high-pressure duct. The H-end is connected to the low-pressure duct. -The flow rate regulator is provided on the bypass duct. Above, the flow rate regulating valve is used to regulate the flow rate of the fluid flowing through the bypass duct; and the printing-control unit of the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is used to start the compressor. The electronic expansion valve, the flow rate regulating valve, and the shrinking machine are controlled, and the flow rate regulating valve system is in a closed state, the flow rate regulating valve system is in an open state, and the compressor is subject to the start operation. To - health for the control signal, the control signal line work shorter than - normal operation - A control signal for health. 2. The air conditioner start-up control system as described in item 1 of the scope of the application for patent, first including pressure storage, the pressure accumulator is arranged above / middle the low-pressure duct. The Haifang Tongdao official system is used to connect to one of the high-pressure ducts. Radon = conducting f, 'the high-pressure duct is located between the pressure _' the condenser and „h, and the flow rate regulating valve system is A hot gas valve, the hot gas valve 565676, the consumer co-operatives of the Intellectual Property Bureau of the Ministry of Economic Affairs engraved C8 ~~~ --D8. The scope of patent application is set on the hot gas bypass duct. 矣 3. The start-up control system of the air conditioner as described in item 1: includes a pressure accumulator and a collector, the pressure accumulator is disposed on the low-pressure duct, and the collector is disposed on the condenser On one of the upstream high-pressure guides, the bypass duct is a ventilation bypass duct connected to the collector and the accumulator—the upstream side, and the flow rate regulating valve is a vent valve. The ventilation valve is arranged on the ventilation bypass duct. 4. The working control signal system for starting the operation of one of the compressors in the air-conditioner startup control system 22 described in item 1 of the scope of patent application. There is a cycle. The cycle of the work control signal is relative. 20 ~ 80% of the cycle of one working control signal of the compressor under a normal operation. ^ 5. The air conditioner start-up control system according to item 1 of the scope of patent application, wherein one of the compressors The ratio between one load time and one non-load time under start-up operation is 2: 8-5: 5. ^ 6 · The air-conditioner start-up control system described in item 1 of the scope of patent application, wherein the start-up operation system It lasts for M minutes. Remaining 7. The start-up control system of the air conditioner as described in item 1 of the patent application scope, during the start-up operation of the compressor, the cycle of the work control signal is 4-16 Seconds 8. A start-up control system for an air conditioner, comprising: ^ a compressor, which is controlled by a pulse width modulation method in accordance with a work control signal; an electronic expansion valve, which is used to perform refrigerant compression on the compressor; Swell; it an in fn I fl II— I n I n — ^ i fn VI n II— order --------- line- (please read the precautions on the back before filling in this page) ⑽676 6. The scope of the patent application is a high-pressure conduit connected to the outlet side of the compressor and the inlet side of the electronic expansion valve;-a low-pressure conduit connected to the outlet side of the electronic expansion valve and the inlet side of the compressor; -Bypass conduit 'has a first end and a second end, the first end is connected to the high pressure conduit', the second end is connected to the low pressure guide ^ first rate control valve, and is provided on the bypass Above the duct, the flow rate adjusting valve is used to adjust the flow rate of the fluid flowing through the bypass duct; and—a control unit is used for the flow rate adjusting valve, the The electronic expansion valve and the compressor are controlled so as to prevent refrigerant from entering the compressor. 9. A start-up control method for an air wither, comprising the following steps: determining whether to input a start-up signal to a compressor controlled by a pulse-width modulation method according to the-work control signal; and when inputting The start signal is operated for a predetermined time when the electronic expansion room is closed and the flow rate adjustment valve is opened. The flow rate adjustment valve is disposed above the bypass duct, and the The bypass duct is connected to the outlet side and the inlet side of the compressor. , ⑺ · The air conditioner startup control method as described in item 9 of the scope of patent application, wherein in the operation step of the compressor, the compressor is operated by having a work control signal having a period of one cycle, the The period of the work control = number is less than-the week of one of the work control signals under normal operation. 26 The paper size applies to the Chinese National Standard (CNS) A4 specification (21 × x297 mm). (Fill in this page) Order ----- 、 ----- line Κ! 565676 ^ Applying the patent scope method, Γ 中 如 巾 料 ㈣_9 _mentioned in the "machine start-up control party // 中", the operation steps in the compressor are performed by having a cycle of one working control signal for the compressor ° Under normal operation, the period of the work control signal is 20 watts, and the ratio between the load time of the towel control rhyme 9_ 敎 ㈡ and the control side is 2: 8-5: 5 to complete and load between , Non == as described in Zhonglili _ item ^ tune the machine, where the operation steps in the compressor are continuous __ 5 minutes -------- order ---,-(please first (Please read the notes on the back and fill in this page.) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs.