TW500897B - Double-return recirculation system for air conditioner and method for controlling same - Google Patents

Abstract

Disclosed is a double-return recirculation system for an air conditioner, comprising: an evaporator, a compressor, a condenser, and an expanding valve that are connected in series. The first bypass circuitry bypasses the compressor and connects to the upstream of an inlet and the downstream of an outlet of the compressor. At where the first bypass circuitry connects to the upstream of the inlet of the compressor is provided with the first three-way valve to form a compressor bypass return. The second bypass circuitry bypasses the expanding valve and connects to the upstream of an inlet and the downstream of an outlet of the expanding valve. At where the second bypass circuitry connects to the upstream of the inlet of the expanding valve is provided with the second three-way valve and along the second bypass circuitry is connected to a pump in series to form an expanding valve bypass return. When the ambient temperature is above the room temperature, the air conditioner uses the refrigerating circuitry formed by the serially connected evaporator, compressor, condenser, and expanding valve. When ambient temperature is beneath the room temperature, the air conditioner uses the circulation returns serially connected by the evaporator, compressor bypass turn, condenser, and expanding valve bypass return such that the air conditioner is able to operate under low ambient temperature.

Description

500897 V. Description of the invention (1) [Field of the invention] The present invention relates to a dual-loop circulation system of an air conditioner and a control method thereof, and more particularly to a refrigeration cycle when the ambient temperature is higher than room temperature, and When the ambient temperature is lower than room temperature, the air conditioner uses a pumping circuit to enable the air conditioner to operate under room temperature conditions. [Background of the Invention] The air conditioner is used to meet the needs of human life and industry. Most of the equipment for adjusting the ambient temperature, humidity, and cleanliness currently use refrigeration cycle systems or hot pump circulation systems. Φ " The conventional air conditioner uses a refrigeration cycle system. Please refer to the first figure, which is a schematic diagram of the refrigeration cycle system of a conventional air conditioner. The refrigeration cycle system is composed of an evaporator (1 0 A), a Compressor (20 A), a condenser (30 A) and an expansion valve (40 A), use a refrigerant to absorb the heat of the cooling space (50 A) in the evaporator (10 A) Then, the refrigerant flows through the compressor (20 A) and is compressed into high-temperature and high-pressure refrigerant gas, and then exhausts the heat to the outside through the condenser (30 A), and then the refrigerant passes through the expansion valve (40 A) to a low pressure. The low-temperature refrigerant flows back to the cooling space (50 A) to absorb heat, and the refrigerant flows repeatedly to reduce the temperature of the $ cooling space (50 A). However, because the air conditioner is in a low temperature environment, it often causes trips and constant The phenomenon of opening and stopping is very difficult to control the ambient temperature, and makes the temperature of the cooling space (50 A) unstable. The current solution for the industry is to change the heat pump circulation system, which is a cold room that uses an evaporator to absorb heat and cool the space when the ambient temperature is high.

juuoy / V. Explanation of the invention (2) The cycle is bad, and the warm room cycle to the warm room cycle. Therefore, the invention will usually be produced. It is proposed that [the purpose of the invention, the invention is often not easy, [when the total ambient temperature of the invention is low Cut, but when the ambient temperature 'prone to open and in order to solve the above-mentioned empty trip and do not disconnect and solve the problem. The main purpose is to de-jump the machine and keep it open and to make it air-cooled.] To achieve the above-mentioned purpose, the present invention includes a refrigeration cycle and a condenser to heat up in the space by heating at 120 ° C to 25 ° C. Air-conditioner switch-off phenomenon. In the case of low temperature, the machine is easy to stop and consumes a lot of power. This second problem is that the machine is stopped in a low temperature environment, and the temperature is not stable. The circuit system includes an evaporator and an inflation valve circuit. The compressor is bypassed and the pipeline is bypassed to form a valve and connected to the circuit and the expansion valve. The second bypass pipe serves as the ambient temperature condenser and the expansion circuit. When the bypass is connected to the inlet end of the bypass compression and expansion valve of the compressor in series with a valve higher than the room temperature valve, and a compressor is connected to the inlet end of the compressor circuit, a pump is connected in front of the inlet end of the circuit. The air-bypass air-by-air bypass bypass machine and the cold-bypass compressor loop machine circuit include a connection between the first inlet end and the outlet end, and a second bypass port end. The double-return bad circuit 'is provided with a condenser, before expansion, and a connection point. A shape-adjusting machine mining loop circuit is used as a bypass expansion evaporator, and when the refrigeration circuit valve of the environmental circuit is connected in series, With a bypass expansion bypass line, while the first first three-way valve bypasses the second bypass pipe expansion valve, and the expansion valve circuit, the compressor, the cold temperature is lower than the room

Υ〇897 Five 'invention description

At warm time, the air conditioner can also be operated by using the evaporator and the pump connected in series with the expansion valve circuit, so as to solve the problem of tripping and non-disconnecting and stopping easily when it is empty, and to make the cooling space [detailed description of the invention 】 T-pass the compressor circuit, condenser, bypass circuit, so that the empty 5 weeks machine in low temperature conditions to adjust the machine in a low temperature environment, it is a common phenomenon, the environmental temperature control is very low temperature up and down problems. Please refer to [second figure], the schematic diagram of the ring system, in which the air compressor, the compressor (2 0 B), and the condenser B) are connected in series by pipes to form a refrigerating cycle circulation system. 2 1) and a bypass compressor circuit (2 1) are connected by a first compressor (2 0 B) and connected to the pressure and the outlet end, and the front side of the first bypass pipe 0B) It is provided to control the evaporator (10B) in 20B) or the first bypass line (path (41) is connected by a second bypass line 4 0B) and is connected to the expansion valve (4, and A working flow in a second third condenser (300B) or a second bypass line (42) of the second bypass line (42 at the front end of the inlet end is a double circuit of the air conditioner of the present invention. The cycle machine includes an evaporator (100B) (300B), an expansion valve (40 loop circuit, the dual circulation circuit of the air conditioner of the present invention, which includes a bypass dust expansion valve circuit (41), and the bypass A bypass line (2 2) bypasses the inlet front line (2 2) of the shrinking machine (2 0 B) and the compressor (2 a first three-way valve (23), the working flow used Pass the compressor (2 2). The bypass expansion valve old path (4 2) bypasses the expansion valve (0B) before the inlet end and the outlet end) and the expansion valve (4 〇B) the valve (4 3), for controlling the body to pass through the condenser (30 Β), wherein the second bypass line (4

500897 V. Description of the invention (4) 2) There is a Lipu (4 4) on it to force the internal circulation to lift out the heat source inside the system. Referring to the second figure again, when the outdoor temperature is higher than the indoor temperature, the compressor (2 0 B) starts to operate, and the first three-way valve (2 3) makes the evaporator (1 0 B) and the compressor ( 2 0 B) is a passage, the first bypass line (2 2) is closed, and the second three-way valve (4 3) makes the condenser (3 0 B) and the expansion valve (4 0 B) a passage. , The second bypass line (4 2) is closed. Therefore, the air conditioner uses a refrigeration cycle formed by an evaporator (1 0 B), a compressor (2 0 B), a condenser (3 0 B), and an expansion valve (4 0 B) to cool the space (5 0 B). Temperature drop. When the outdoor temperature drops below a set temperature, for example, at night or on a rainy day, when the temperature sensed by the air-conditioning system is lower than the set value, the compressor (20 B) stops operating, and the first three-way valve ( 2 3) Make the evaporator (1 0 B) and the first bypass line (2 2) a passage, the passage of the compressor (2 0 B) is closed, and the second three-way valve (4 3 ) Make the path between the condenser (30 B) and the pump (4 4), and close the path of the expansion valve (40 B), so that the refrigerant is pumped from the second bypass line (4 2) through the pump (4 4) It is transferred into the evaporator (1 0 B) for pumping circulation. Therefore, at this time, the internal pressure of the evaporator (10 B) and the condenser (30 B) are very close, all relying on the temperature difference between indoor and outdoor at that time and the density difference of the refrigerant to form a two-phase inside the air conditioner If the change process is too slow, the pump (4 4) can be started. The pump (4 4) will force the internal circulation to lift out the heat source inside the system, so that the heat pipe principle (Thermos i phon) Through the indoor 500897 V. Description of the invention (5) " " --- The hydraulic resistance value and saturation temperature difference on the outdoor circuit are used for heat exchange work. On the other hand, use the pump (4 4) to force the internal circulation Assisted 'to achieve heat exchange in low temperature environments. Therefore, the dual-circuit circulation system of the air conditioner of the present invention can start the compressor to perform a refrigeration cycle when the outdoor temperature is higher than the indoor temperature, and when the outdoor temperature is lower than the indoor temperature when it is rainy or rainy, it can be started instead. Since the pump circuit has two loops, the power value of the compressor is generally 1 0 5 0 W based on the cooling capacity of 1 ton. Switching to the pump system power value is about i QQ w, which can save about 10 Therefore, the double-loop circulation system can meet the demand for power saving. Please refer to [the third figure], which is a flowchart of the control method of the dual-circuit circulation system of the air conditioner according to the present invention, wherein the control method of the dual-circuit circulation system is to control the air conditioner according to the temperature difference between the indoor temperature and the outdoor temperature. Operating pole: type 'to save operating current, the steps include: A. First set the temperature difference of the compaction machine (60) and set the temperature difference of the pump (6 minus the sum. Phase} machine small} degree 5 tones Or 3 temperature, 6 air temperature, 6 temperature, C constant, etc. The value of the C room will differ by 6 degrees. The temperature and temperature of the external temperature machine will be fixed indoor contraction, and the room pressure will be 1-^. Operation of 6 types of machines}, value 6 triple shrink 2) The difference C is pressure 6 4 temperature value transfer (6 difference openable degree C, temperature type, temperature value when the mold is in the differential system transfer room Temperature, temperature, and temperature. The measured value of the difference is based on the small-scale thermometer. The difference between the temperature and the difference is reduced. The temperature difference between the temperature and the difference is BC. Below 'only four pictures] Machine temperature difference 7 1) 2 hours to adjust the machine to pump the time), the time between the machine pressure, only clear The change and value are related to the pump and the field (pressure of the 69 machine 8), that is, the operating mode is shown by the heat, the value curve value setting, the temperature difference between the heating pipe and the heating pipe, so the air temperature difference shrinking machine is modified to the scope of the present invention. V. Description of the invention (6) The temperature difference value is between the pressure mode (6 8); when the heat pipe operation (6 7) is started, the pump runs the pump circulation circuit; please refer to the machine and pump conditions [Figure, where the compression pump temperature difference curve ((7 2) is between 0 ~ 7 1) value, so empty time, temperature difference value difference curve (7: 0 and 3 ~ 7 small 0) value, so air conditioning However, the above can be used to limit the scope of this issue to the same scope. When the temperature difference between the pumps, the starting pump running difference is greater than or equal to the pump temperature difference). The compressor operating mode shrinks the compressor to perform a refrigeration cycle; in order to start the pump of the air conditioner, its mode (69) is based on the principle of not starting the compression tube to perform the heat exchange work. The relationship between the temperature difference and the operating mode (70) is set to 0 ° c and 4 ° C. When the temperature difference curve is greater than the pump temperature difference curve (rotation mode (A); between 2 and 3 hours) The value of the curve (7 1) and the compressor pumping operation mode (B) of the compressor temperature regulator is smaller than the compressor temperature difference curve (7-rotation mode (C). It is only a preferred embodiment of the Ming, if not, that is, the application according to the invention Patent white should still be covered by the invention patent

500897 Brief description of the drawings [Illustration] The first picture is the freezing of the conventional air conditioner. The second picture is the double of the air conditioner of the present invention. The third picture is the double return of the air conditioner of the present invention. The fourth figure, the temperature difference value and the operation mode [Illustration of the drawing number] Evaporator ........ Compressor ............. Bypass compressor circuit · · · · · · First bypass line ···························· 1 ······························· Bypass expansion valve circuit · · · · · · Second bypass line · · · · · · Second three way valve ····· Cooling Space ... Set compressor temperature difference value..Setting Lipu temperature difference value..Measure indoor temperature .. · · · Measure the difference in nose temperature ........ Schematic diagram of the ring system. Road circulation system diagram. The control method flow of the circulatory system is a diagram.

0 A, 1 〇 B

0 A, 2 0 B 1 4 2 3

0 A, 3 0 B

0 A, 4 0 B 1 2 3 4 0 A, 5 0 B ❿ 0 1 2 3 4

500897 on page 11 The diagram simply explains that the temperature difference is greater than the compressor temperature difference ... 6 5 The temperature difference is less than the Lipu temperature difference ... 6 6 Compressor operation mode ... 67 Pump operation mode ... 6 8 Heat pipe operation mode ... 6 9 Compressor temperature difference curve ... 70 Pump temperature difference curve ... 71 Temperature difference change curve ... 72

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Claims (1)

500897 6. Scope of patent application 1. A dual-circuit circulation system for an air conditioner, comprising an evaporator, a compressor, a condenser, and an expansion valve connected in series to form a refrigeration cycle; it is characterized by: A first bypass line is connected behind the outlet end, and a first tee is provided at the connection point between the first luxury bypass line and the inlet end of the compressor to form a bypass compressor circuit; and the expansion valve; A second bypass line is connected to the front of the inlet end and the rear of the outlet end, and a second three-way valve is provided at the connection between the second bypass line and the inlet end of the expansion valve, and the second bypass line is connected to the second bypass line. A pump is connected in series to form a bypass expansion valve circuit. When the ambient temperature is higher than room temperature, the air conditioner uses a refrigeration cycle circuit in which an evaporator, compressor, condenser, and expansion valve are connected in series. When the temperature is high, the air conditioner adopts a circulation circuit in which the evaporator, the bypass compressor circuit, the condenser, and the bypass expansion valve circulation circuit are connected in series, so that the air conditioner can operate under low temperature conditions. 2. A control method of a dual-loop circulation system of an air conditioner, which controls the operation mode of the air conditioner according to the temperature difference between the indoor temperature and the outdoor temperature, so as to save operating current. The steps include: (a) setting the temperature difference of the compressor And pump temperature difference; (b) measuring indoor temperature and outdoor temperature; (c) subtracting indoor temperature from outdoor temperature to obtain a temperature difference; (d) when the temperature difference is equal to or less than the compressor temperature difference, start the compressor Operating mode; (e) starting the pump operating mode when the temperature difference is between the compressor temperature difference and the pump temperature difference; and Page 13 500897 6. Scope of patent application (f) When the temperature difference is greater than or equal to the pump temperature difference, start the heat pipe operation mode. Page 14