One-for-one air conditioning system

Abstract

The present invention discloses a one-for-one air conditioning system, including two refrigeration systems, one of which is used as a main refrigeration system and the other as a backup refrigeration system, the evaporators in the two refrigeration systems are coupled together to form a coupling structure, and the coupling structure as a whole is equipped with two centrifugal fans; it also includes a control unit and two dampers, the air outlets of the two centrifugal fans are respectively connected to one end of the two dampers, the other ends of the two dampers are connected to one end of two loads in a one-to-one correspondence, and the other ends of the two loads are connected to the coupling structure through pipelines; the control unit is respectively connected to the compressors, axial flow fans, electronic expansion valves in the two refrigeration systems, and the two centrifugal fans and two dampers. The present invention has a simple structure, is easy to manufacture, has low cost, high efficiency, is easy to install, has a low failure rate, high reliability, and is easy to maintain, and realizes one-for-one air conditioning.

Description

Technical Field

[0001] The invention relates to the field of air conditioning equipment, in particular to a one-for-one-standby air conditioning system. Background Art

[0002] Special equipment is equipped with special air conditioners, which have functions such as cooling and heating, and provide a good temperature and humidity environment for special equipment. Since special equipment not only generates a large amount of heat and has large wind resistance, but also requires reliable operation around the clock, in order to work reliably around the clock, special equipment adopts a one-in-one-standby mode. Therefore, the air conditioning device that adjusts the temperature and humidity environment for special equipment is also required to be one-in-one-standby. Based on this one-in-one-standby temperature and humidity adjustment requirement for the enclosed heating space of special equipment, how to achieve cooling of any group of special equipment with one-in-one-standby regardless of which group of refrigeration systems is turned on. New requirements are put forward for the air conditioning system. The air conditioning system adopts steam compression to achieve refrigeration, electric heating for heating, and air supply through the air duct to adjust the temperature and humidity of the one-in-one-standby load. Usually when a refrigeration system is turned on, the air supply passes through two loads, one for use and one for backup. When passing through the working load, the temperature and humidity of the load are adjusted. When passing through the backup load, no heat exchange occurs because the load itself does not work and generate heat. Since the air passes through two loads, the air supply resistance increases and the return air temperature is lower, resulting in the air conditioning device requiring the air supply fan to have a high air pressure and a large air volume. In addition, the shared load will also increase. Therefore, the above method has defects such as high noise, high cooling cost, and high power consumption. Summary of the invention

[0003] The object of the present invention is to provide a one-for-one air conditioning system to solve the problems of high noise, high refrigeration cost and high power consumption in the prior art one-for-one air conditioning equipment.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A one-for-use and one-for-standby air conditioning system comprises two refrigeration systems, each of which is respectively composed of a compressor, a condenser equipped with an axial flow fan, a liquid storage device, a filter, an electronic expansion valve, an evaporator, and a gas-liquid separator, and is characterized in that: one of the two refrigeration systems is used as a main refrigeration system and the other is used as a standby refrigeration system, the evaporators in the two refrigeration systems are coupled together to form a coupling structure, the air outlet side of the evaporator of the first refrigeration system in the coupling structure leads to the air inlet side of the evaporator of the second refrigeration system, the coupling structure is equipped with two centrifugal fans as a whole, and the air inlets of the two centrifugal fans lead to the air outlet side of the evaporator of the second refrigeration system in the coupling structure;

[0006] It also includes a control unit and two dampers, wherein the air outlet of one centrifugal fan is connected to one end of the first damper and one end of the second damper respectively, and the air outlet of the other centrifugal fan is also connected to one end of the first damper and one end of the second damper respectively, the other end of the first damper is connected to one end of a load, and the other end of the second damper is connected to one end of another load, and the other ends of the two loads are connected to the air inlet side of the evaporator of the first refrigeration system in the coupling structure through a pipeline;

[0007] The control unit is respectively connected to the compressors, axial flow fans, electronic expansion valves, two centrifugal fans and two dampers in the two refrigeration systems. The control unit switches and controls the operation of the main and standby refrigeration systems, and switches and controls the two centrifugal fans to provide cold air. At the same time, the control unit controls the opening of the dampers corresponding to the working loads to direct the cold air to the working loads.

[0008] The one-for-one air conditioning system is characterized in that: in each refrigeration system, the outlet end of the compressor is connected to one end of the condenser through a pipeline, the other end of the condenser is connected to the liquid reservoir through a pipeline, the liquid reservoir is connected to one end of the filter through a pipeline, the other end of the filter is connected to the inlet end of the electronic expansion valve through a pipeline, the outlet end of the electronic expansion valve is connected to one end of the evaporator through a pipeline, the other end of the evaporator is connected to the inlet end of the gas-liquid separator through a pipeline, and the outlet end of the gas-liquid separator A is connected to the inlet end of the compressor through a pipeline, thereby forming a refrigerant circulation loop in the refrigeration system.

[0009] The one-in-one-standby air conditioning system is characterized in that it also includes a protection system, which includes a temperature sensor and two low-pressure protectors. The temperature sensor is arranged on the air inlet side of the evaporator of the first refrigeration system in the coupling structure formed by the evaporators in the two refrigeration systems, and the air inlet temperature signal of the coupling structure is detected by the temperature sensor; one of the low-pressure protectors is bypassed and connected to the pipeline between the gas-liquid separator and the compressor in the first refrigeration system, and the other low-pressure protector is bypassed and connected to the pipeline between the gas-liquid separator and the compressor in the second refrigeration system; the temperature sensor and the low-pressure protector are respectively electrically connected to the control unit, and the control unit receives the signals of the temperature sensor and the low-pressure protector.

[0010] The one-for-one-standby air conditioning system is characterized in that it also includes two fluorine filling nozzles, and the two fluorine filling nozzles are connected to the pipelines between the gas-liquid separators and the compressors in the two refrigeration systems in a one-to-one correspondence and bypass manner.

[0011] The one-in-one-standby air conditioning system is characterized in that an electric heating tube is provided in the coupling structure, the electric heating tube is embedded between the two evaporators in the coupling structure, and the control unit is control-connected to the electric heating tube.

[0012] The present invention has a simple structure, is easy to manufacture, has low cost, high efficiency, low power consumption, low noise, is easy to install, has a low failure rate, high reliability, is easy to maintain, and can efficiently achieve air conditioning. In addition, it can effectively protect the refrigeration system, is safe and reliable, and saves energy. Compared with the prior art, the present invention also has the following advantages:

[0013] (1) The main and standby systems are completely independent and have no single point effect;

[0014] (2) The main and standby systems can switch automatically;

[0015] (3) The air volume and energy of the main and standby systems are adjustable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, the one-for-one air conditioning device includes a refrigeration system A, a refrigeration system B, a condensing ventilation system, an air supply system, and an electric control system, wherein:

[0019] Refrigeration system A includes compressor A1, condenser A2, liquid reservoir A3, filter A4, electronic expansion valve A5, evaporator A6, and gas-liquid separator A7. The outlet of compressor A1 is connected to one end of condenser A2 through a pipeline, the other end of condenser A2 is connected to the inside of liquid reservoir A3 through a pipeline, the inside of liquid reservoir A3 is also connected to one end of filter A4 through a pipeline, the other end of filter A4 is connected to the inlet of electronic expansion valve A5 through a pipeline, the outlet of electronic expansion valve A5 is connected to one end of evaporator A6 through a pipeline, the other end of evaporator A6 is connected to the inlet of gas-liquid separator A7 through a pipeline, the outlet of gas-liquid separator A7 is connected to the inlet of compressor A1 through a pipeline, thus forming a refrigerant circulation loop in refrigeration system A. Condenser A1 and evaporator A6 realize heat exchange between refrigeration circulation loops of refrigeration system A.

[0020] Refrigeration system B includes compressor B8, condenser B9, liquid storage tank 10, filter B11, electronic expansion valve B12, evaporator B13, and gas-liquid separator B14. The outlet of compressor B8 is connected to one end of condenser B9 through a pipeline, and the other end of condenser B9 is connected to the inside of liquid storage tank B10 through a pipeline. The inside of liquid storage tank B10 is also connected to one end of filter B11 through a pipeline, and the other end of filter B11 is connected to the inlet of electronic expansion valve B12 through a pipeline. The outlet of electronic expansion valve B12 is connected to one end of evaporator B13 through a pipeline, and the other end of evaporator B13 is connected to the inlet of gas-liquid separator B14 through a pipeline. The outlet of gas-liquid separator B14 is connected to the inlet of compressor B8 through a pipeline, thereby forming a refrigerant circulation loop in refrigeration system B. Condenser B9 and evaporator B13 realize heat exchange between refrigeration circulation loops of refrigeration system B.

[0021] The condensing ventilation system includes an axial flow fan A15 for condenser A2 in refrigeration system A and an axial flow fan B16 for condenser B9 in refrigeration system B.

[0022] The air supply system includes a coupling structure formed by coupling evaporator A6 and evaporator B13. In the coupling structure, the air outlet side of evaporator A6 faces the air inlet side of evaporator B13. The coupling structure is equipped with centrifugal fans A18 and B19 as a whole. The air inlets of centrifugal fans A18 and B19 are both facing the air outlet side of evaporator B13.

[0023] The damper A20, damper B21, load A22, load B23, air duct, etc. constitute an air supply circuit. The evaporator A6, evaporator B13, load A22, and load B23 realize heat exchange of the air supply system. The air outlet of the centrifugal fan A18 is connected to one end of the damper A20 and damper B21 through the air duct, and the outlet air of the centrifugal fan B19 is also connected to one end of the damper A20 and damper B21 through the air duct. The other end of the damper A20 is connected to one end of the load A22 through the air duct, and the other end of the damper B21 is connected to one end of the load B23 through the air duct. The other ends of the load A22 and the load B23 are connected to the air inlet side of the evaporator A6 in the coupling structure. The control unit can control the air flowing out of the load to exchange heat with the evaporator A6 in the coupling structure and then return to the load through the centrifugal fan A18, so as to adjust the temperature and humidity of the load A22 and the load B23. The control unit can also control the air flowing out of the load to exchange heat with the evaporator B13 of the coupling structure and then return to the load through the centrifugal fan B19, so as to adjust the temperature and humidity of the load A22 and the load B23. The control unit adjusts the temperature and humidity of the working load by controlling the corresponding damper A20 of the load A22 during operation and the corresponding damper B21 of the load B23 during operation.

[0024] The electric control system includes a power supply and a control unit 24 , wherein the power supply is connected to the compressor A1 , the compressor B8 , the axial flow fan A15 , the axial flow fan B16 , the centrifugal fan A18 and the centrifugal fan B19 through the control unit 24 .

[0025] The evaporator A6 and the evaporator B13 are coupled together, and the electric heating tube 17 is embedded in the coupled evaporators.

[0026] The fluorine filling nozzle A25 in the refrigeration system A is connected to the pipeline between the gas-liquid separator A7 and the compressor A1 through a bypass.

[0027] The fluorine filling nozzle B26 in the refrigeration system B is bypassed and connected to the pipeline between the gas-liquid separator B14 and the compressor B8.

[0028] The protection system includes a temperature sensor 27, a low-pressure protector A28, and a low-pressure protector B29, wherein the temperature sensor 26 is arranged at the air inlet of the coupled evaporator A6 and the evaporator B13, i.e., the air inlet side of the evaporator A6, to monitor the air inlet temperature of the evaporator. The low-pressure protector A28 is connected to the pipeline between the gas-liquid separator A7 and the compressor A1 through a bypass, and the low-pressure protector B29 is connected to the pipeline between the gas-liquid separator B14 and the compressor B8 through a bypass.

[0029] The temperature sensor 27, the low pressure protector A28, and the low pressure protector B29 are respectively connected to the control unit 24. The control unit 24 controls the power supply to the compressors A1 and B8 in the refrigeration systems A and B based on the signals of the temperature sensor 27 and the low pressure protectors A28 and B29.

[0030] In the present invention:

[0031] The evaporator A6 and the evaporator B13 are coupled together, and the electric heating tube 17 is embedded in the coupled evaporators. The centrifugal fans A18 and B19 are used together.

[0032] The fluorine filling nozzle A25 is connected to the pipeline between the gas-liquid separator A7 and the compressor A1 through a bypass.

[0033] The fluorine filling nozzle B26 is connected to the pipeline between the gas-liquid separator B14 and the compressor B8 through a bypass.

[0034] A temperature sensor 26 is provided at the air inlet after the evaporator A6 and the evaporator B13 are coupled.

[0035] A low-pressure protector A28 is provided between the gas-liquid separator A7 and the compressor A1, and a low-pressure protector B29 is provided between the gas-liquid separator B14 and the compressor B8.

[0036] The damper A20 and the corresponding load A22 are opened synchronously, and the damper B21 and the corresponding load B23 are opened synchronously.

[0037] The control unit can output a 0-10V control signal to the electronic expansion valve A5 and the electronic expansion valve B12.

[0038] After the air conditioner is powered on, it enters full automatic operation and automatically selects the working mode of the air conditioner according to the temperature difference; the corresponding working mode can be selected through the mode button.

[0039] When load A22 (or load B23) is working, the control unit controls the corresponding damper A20 (or damper B21) to open, and at this time, refrigeration system A or refrigeration system B is turned on.

[0040] When the refrigeration system A is working, the compressor A1 compresses the refrigerant into high-temperature and high-pressure gas, which enters the condenser A2 for heat exchange with the forced convection air and is cooled into liquid. It enters the liquid storage A3 through the filter A4 and the electronic expansion valve A5. After throttling, it becomes low-temperature and low-pressure refrigerant liquid. It enters the evaporator A6 for heat exchange and becomes gas. It passes through the gas-liquid separator A7 and enters the compressor A1 again. This cycle repeats. At the same time, the axial flow fan A15 and the centrifugal fan A18 (or the centrifugal fan B19) work continuously to force convection heat exchange to achieve refrigeration.

[0041] When the refrigeration system B is working, the compressor B8 compresses the refrigerant into high-temperature and high-pressure gas, which enters the condenser B9 to exchange heat with the forced convection air and is then cooled into liquid and enters the liquid storage tank B10. After passing through the filter B11, it enters the electronic expansion valve B12 and becomes a low-temperature and low-pressure refrigerant liquid after throttling. After entering the evaporator B13 for heat exchange, it becomes gas, passes through the gas-liquid separator B14, and enters the compressor B8 again. This cycle repeats. At the same time, the axial flow fan B16 and the centrifugal fan A18 (or the centrifugal fan B19) continuously work to force convection heat exchange to achieve refrigeration.

[0042] When heating, the electric heating tube 17 works, and the centrifugal fan A18 (or centrifugal fan B19) works continuously to force convection heat exchange to achieve heating.

[0043] When the centrifugal fan A18 is working, the air from the centrifugal fan A18 enters the damper A20 (or damper B21) through the air duct, and then enters the centrifugal fan A18 again after heat exchange with the working load A22 (or load B23) and the coupled evaporator through the air duct, so as to adjust the temperature and humidity of the working load A22 (or load B23).

[0044] When the centrifugal fan B19 is working, the air from the centrifugal fan B19 enters the damper A20 (or damper B21) through the air duct, and then enters the centrifugal fan A19 again after heat exchange with the working load A22 (or load B23) and the coupled evaporator through the air duct, so as to adjust the temperature and humidity of the working load A22 (or load B23).

[0045] The temperature sensor 27 monitors the temperature (T) of the indoor return air of the air conditioning equipment in real time and feeds it back to the control unit 24. The control unit 24 automatically compares the return air temperature with the set temperature (T0). When the return air temperature reaches the set temperature, the compressor A1 (or compressor B8) stops working, the refrigeration system A (refrigeration system B) stops working, and the centrifugal fan A18 (or centrifugal fan B19) continues to work for ventilation. When the return air pressure in the refrigeration system is low, the low pressure protector A28 (or low pressure protector B29) is activated, and the compressor A1 (or compressor B8) stops working.

[0046] When T≥T0+4°C, a 10V control signal is output to the electronic expansion valve A5 (or electronic expansion valve B12).

[0047] When T0+4℃>T≥T0+2℃, an 8V control signal is output to the electronic expansion valve A5 (or electronic expansion valve B12).

[0048] When T0+2℃>T≥T0, a 6V control signal is output to the electronic expansion valve A5 (or electronic expansion valve B12).

[0049] When T0>T≥T0-1℃, a 3V control signal is output to the electronic expansion valve A5 (or electronic expansion valve B12).

[0050] The embodiments described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. One-for-one air conditioning system, including two refrigeration systems, each refrigeration system is composed of a compressor, a condenser equipped with an axial flow fan, a liquid storage tank, a filter, an electronic expansion valve, an evaporator, and a gas-liquid separator, and is characterized by: One of the two refrigeration systems is used as a main refrigeration system and the other is used as a standby refrigeration system. The evaporators in the two refrigeration systems are coupled together to form a coupling structure. The air outlet side of the evaporator of the first refrigeration system in the coupling structure leads to the air inlet side of the evaporator of the second refrigeration system. The coupling structure is equipped with two centrifugal fans as a whole. The air inlets of the two centrifugal fans lead to the air outlet side of the evaporator of the second refrigeration system in the coupling structure. It also includes a control unit and two air doors. The air outlet of one centrifugal fan is connected to one end of the first air door and one end of the second air door respectively, and the air outlet of the other centrifugal fan is also connected to one end of the first air door and one end of the second air door respectively. One end of the two dampers is connected, the other end of the first damper is connected to one end of a load, the other end of the second damper is connected to one end of another load, and the other ends of the two loads are connected to the air inlet side of the evaporator of the first refrigeration system in the coupling structure through a pipeline; the control unit is respectively connected to the compressor, axial flow fan, electronic expansion valve, two centrifugal fans and two dampers in the two refrigeration systems, and the control unit switches and controls the main and standby refrigeration systems to work, and switches and controls the two centrifugal fans to provide cold air, and at the same time, the control unit controls the damper corresponding to the working load to open so that the cold air is directed to the working load; The one-in-use-one-standby air conditioning system further includes a protection system, which includes a temperature sensor and two low-pressure protectors. The temperature sensor is arranged on the air inlet side of the evaporator of the first refrigeration system in the coupling structure formed by the evaporators in the two refrigeration systems, and the temperature sensor detects the air inlet temperature signal of the coupling structure; one of the low-pressure protectors is bypassed and connected to the pipeline between the gas-liquid separator and the compressor in the first refrigeration system, and the other low-pressure protector is bypassed and connected to the pipeline between the gas-liquid separator and the compressor in the second refrigeration system; the temperature sensor and the low-pressure protector are electrically connected to the control unit respectively, and the control unit receives the signals of the temperature sensor and the low-pressure protector; An electric heating tube is arranged in the coupling structure, and the electric heating tube is embedded between two evaporators in the coupling structure, and a control unit is control-connected with the electric heating tube.

2. The one-for-one-standby air conditioning system according to claim 1, characterized in that: In each refrigeration system, the outlet end of the compressor is connected to one end of the condenser through a pipeline, the other end of the condenser is connected to the liquid reservoir through a pipeline, the liquid reservoir is connected to one end of the filter through a pipeline, the other end of the filter is connected to the inlet end of the electronic expansion valve through a pipeline, the outlet end of the electronic expansion valve is connected to one end of the evaporator through a pipeline, the other end of the evaporator is connected to the inlet end of the gas-liquid separator through a pipeline, and the outlet end of the gas-liquid separator A is connected to the inlet end of the compressor through a pipeline, thereby forming a refrigerant circulation loop in the refrigeration system.

3. The one-for-one-standby air conditioning system according to claim 1, characterized in that: It also includes two fluorine filling nozzles, which are connected to the pipelines between the gas-liquid separators and the compressors in the two refrigeration systems in a one-to-one correspondence and bypass manner.

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