Air conditioning device and method

Abstract

The invention provides an air conditioning device and method, and relates to the technical field of heating ventilation air conditioners. The air conditioning device comprises an indoor unit and an outdoor unit, the indoor unit comprises an inner machine shell, a main evaporator, an inner fan, a first refrigerating pipe and a second refrigerating pipe, the first refrigerating pipe can convey a low-temperature and low-pressure liquid refrigerant provided by the outdoor unit to the main evaporator, and the inner fan can suck external hot air into the inner machine shell; the main evaporator can absorb heat of hot air through low-temperature and low-pressure liquid refrigerants so as to convert the hot air into cold air, the cold air can enter a workshop so as to reduce the temperature in the workshop, and the low-temperature and low-pressure liquid refrigerants can be vaporized into low-temperature and low-pressure gaseous refrigerants in the process that the hot air is converted into the cold air through the main evaporator. And the second refrigerating pipe can convey the low-temperature and low-pressure gaseous refrigerant to the outdoor unit, so that the outdoor unit converts the low-temperature and low-pressure gaseous refrigerant into a low-temperature and low-pressure liquid refrigerant. Therefore, frequent disassembly and cleaning of the equipment are avoided.

Description

Technical Field

[0001] The present application relates to the field of heating, ventilation and air conditioning technology, and in particular to an air conditioning device and method. Background Art

[0002] Air conditioning refers to the process of regulating the indoor temperature, humidity, cleanliness and air flow rate, and the cooling process of refrigeration equipment is a typical air conditioning process. Usually, the refrigeration equipment will suck in the indoor air, then cool the sucked air, and finally transport the cooled air back to the room, thereby achieving the purpose of lowering the indoor temperature. In the related art, for a workshop where mechanical processing is carried out, since the temperature inside is very high, refrigeration equipment is needed to reduce the temperature inside the workshop. However, the air in the workshop is often mixed with pollutants such as graphite, iron powder, oil, dust, etc. These pollutants will enter the refrigeration equipment during the process of the refrigeration equipment sucking in the air in the workshop, and adhere to the evaporator, filter and other components in the refrigeration equipment. If things go on like this for a long time, the evaporator will be blocked and the refrigeration equipment will not be able to work properly. Therefore, it is necessary to frequently disassemble and clean the refrigeration equipment manually or by hiring a professional cleaning company, and after the cleaning is completed, it is necessary to reinstall the equipment, which is a very large project and requires a lot of manpower and material resources. In addition, during the process of disassembling and cleaning the refrigeration equipment, the temperature in the workshop will be very high, so work and production have to be stopped, which not only reduces production efficiency but also increases production costs. Moreover, during the cleaning process, the pollutants attached to the evaporator, filter and other components can easily enter the human body with human breathing, seriously endangering human health. Summary of the invention

[0003] The present application provides an air conditioning device and method, aiming to solve the problem in the related art that refrigeration equipment used to reduce the temperature in a workshop needs to be frequently disassembled and cleaned.

[0004] In order to solve the above-mentioned drawbacks existing in the related technology, the first aspect of the present application provides an air conditioning device, which includes an indoor unit and an outdoor unit. The outdoor unit is used to be installed on the outer wall of a building. The building has an equipment room and a workshop located next to the equipment room. The equipment room and the workshop are separated by a wall. The equipment room has a ventilation window connected to the outside of the building. The indoor unit is arranged in the equipment room and close to the wall. Specifically, the indoor unit includes an inner casing, a main evaporator, an inner fan, an air duct, a first refrigerant pipe and a second refrigerant pipe. The main evaporator is arranged in the inner casing and is located above the inner casing. An air supply port connected to the interior is opened on the outer wall of the inner casing close to the wall, and the air supply port corresponds to the main evaporator. A through hole connecting the workshop and the equipment room is opened on the wall. One end of the air duct is connected to the air supply port, and the other end is connected to the through hole. The inner fan is arranged in the inner casing and is located below the inner casing. An air inlet connected to the interior is opened on the outer wall of the inner casing away from the wall, and the air inlet corresponds to the inner fan. The first refrigerant pipe and the second refrigerant pipe are both arranged in the inner casing. One end of the first refrigerant pipe is connected to the main evaporator, and the other end passes through the inner casing and is connected to the outdoor unit. One end of the second refrigerant pipe is connected to the main evaporator, and the other end passes through the inner casing and is connected to the outdoor unit. Furthermore, the first refrigeration pipe is used to transport the low-temperature and low-pressure liquid refrigerant provided by the outdoor unit to the main evaporator; the internal fan is used to suck the hot air from the outside into the inner casing through the air inlet, and make the hot air flow to the main evaporator; the main evaporator is used to use the low-temperature and low-pressure liquid refrigerant to absorb the heat of the hot air to convert the hot air into cold air, and vaporize the low-temperature and low-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant; the cold air is used to enter the workshop through the air supply port, the wind tube and the through hole in sequence; the second refrigeration pipe is used to transport the low-temperature and low-pressure gaseous refrigerant to the outdoor unit; the outdoor unit is used to convert the low-temperature and low-pressure gaseous refrigerant into a low-temperature and low-pressure liquid refrigerant.

[0005] In some implementations, the indoor unit further includes a water receiving pan, a water delivery pipe and a water tank. The water receiving pan, the water delivery pipe and the water tank are all arranged in the inner housing. The water receiving pan is located below the main evaporator, the water tank is located below the indoor fan, and the water receiving pan and the water tank are connected through the water delivery pipe. Specifically, the water receiving pan is used to receive the condensed water dripping from the main evaporator in the process of converting hot air into cold air; the water delivery pipe is used to transport the condensed water in the water receiving pan to the water tank; and the water tank is used to store the condensed water.

[0006] In some implementations, the indoor unit further includes a filter, which is disposed on the water delivery pipe and is used to filter the condensed water flowing from the water receiving tray to the water tank.

[0007] In some implementations, the indoor unit further includes a drain pipe, a drain hole connected to the interior is opened on the outer wall of the water tank, the drain hole is located above the water tank, the drain pipe is arranged in the inner casing, one end of the drain pipe is connected to the drain hole, and the other end passes through the inner casing. Specifically, the drain pipe is used to discharge excess condensed water in the water tank to the outside of the inner casing when the water level of the condensed water in the water tank exceeds the drain hole.

[0008] In some implementations, the indoor unit further includes an auxiliary evaporator, a circulating water pump, a water supply pipe, and a water return pipe disposed in the inner casing. The auxiliary evaporator is located between the inner fan and the air inlet. One end of the water supply pipe is connected to the water tank, and the other end is connected to the auxiliary evaporator through the circulating water pump. The two ends of the water return pipe are respectively connected to the water tank and the auxiliary evaporator. Specifically, the circulating water pump is used to pump the condensed water in the water tank to the auxiliary evaporator through the water supply pipe; the auxiliary evaporator is used to absorb the heat of the hot air with the condensed water before the hot air flows to the main evaporator; the water return pipe is used to transport the condensed water after absorbing heat in the auxiliary evaporator back to the water tank.

[0009] In some implementation schemes, the indoor unit also includes a controller, a heat exchange tube, a first heat transfer tube, a second heat transfer tube, a temperature detector, a first electric valve, and a second electric valve that are communicatively connected to the controller. The temperature detector and the heat exchange tube are arranged in a water tank and immersed in condensed water. The first heat transfer tube and the second heat transfer tube are both arranged in the water tank. One end of the first heat transfer tube is connected to the heat exchange tube, and the other end passes through the water tank and is connected to the first refrigeration tube. One end of the second heat transfer tube is connected to the heat exchange tube, and the other end passes through the water tank and is connected to the second refrigeration tube. The first electric valve is arranged on the first heat transfer tube, and the second electric valve is arranged on the second heat transfer tube. Specifically, the temperature detector is used to detect the water temperature of the condensed water in the water tank in real time; the controller is used to: determine whether the water temperature of the condensed water in the water tank is greater than a preset temperature threshold, and control the first electric valve and the second electric valve to be opened when the water temperature of the condensed water in the water tank is greater than the preset temperature threshold, so that the heat of the condensed water in the water tank is transferred to the low-temperature and low-pressure liquid refrigerant in the first refrigeration tube in sequence through the heat exchange tube and the first heat transfer tube, and the heat of the condensed water in the water tank is transferred to the low-temperature and low-pressure gaseous refrigerant in the second refrigeration tube in sequence through the heat exchange tube and the second heat transfer tube to reduce the water temperature; when the water temperature of the condensed water in the water tank is reduced to less than or equal to the preset temperature threshold, the first electric valve and the second electric valve are controlled to be closed.

[0010] In some implementations, the indoor unit further includes a filter, which is disposed in the inner casing and between the auxiliary evaporator and the air inlet, and is used to filter the hot air entering the inner casing.

[0011] In some implementation schemes, a maintenance window connected to the interior is opened on the outer wall of the inner casing away from the wall, the maintenance window corresponds to the main evaporator, and a cover plate is rotatably arranged in the maintenance window.

[0012] In some implementations, a heat-insulating layer is provided on the inner surface of the cover plate, the outer surface of the air cylinder, and the outer surface of the water tank.

[0013] In some implementations, an air inlet grille is provided in the air inlet.

[0014] In some implementation schemes, a sewage outlet connected to the interior is opened on the outer wall of the inner casing, and the sewage outlet is located at the bottom end of the inner casing.

[0015] In some implementation schemes, the outdoor unit includes an outer casing, a compressor, a condenser and a throttle. The outer casing is used to be arranged on the outer wall of the building. The compressor, the condenser and the throttle are all arranged in the outer casing. The compressor, the condenser and the throttle are connected in sequence. The throttle is connected to the main evaporator through the first refrigeration pipe, and the compressor is connected to the main evaporator through the second refrigeration pipe. Specifically, the compressor is used to compress the low-temperature and low-pressure gaseous refrigerant transported through the second refrigeration pipe into a high-temperature and high-pressure gaseous refrigerant and transport it to the condenser; the condenser is used to liquefy the high-temperature and high-pressure gaseous refrigerant into a medium-temperature and high-pressure liquid refrigerant and transport it to the throttle; the throttle is used to convert the medium-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure liquid refrigerant, and transport the low-temperature and low-pressure liquid refrigerant to the main evaporator through the first refrigeration pipe.

[0016] In some implementations, an air inlet and an air outlet connected to the interior are provided on the outer wall of the outer casing, the air inlet and the air outlet are respectively located on opposite sides of the outer casing, the air inlet is opposite to the air outlet, and the condenser is located between the air inlet and the air outlet, and the outdoor unit further includes an external fan, which is arranged in the outer casing and located between the air inlet and the condenser. Specifically, the external fan is used to draw outside air into the outer casing from the air inlet, and to make the air entering the outer casing flow through the condenser and flow out from the air outlet; the condenser is specifically used to dissipate the heat of the high-temperature and high-pressure gaseous refrigerant into the outside air, so as to liquefy the high-temperature and high-pressure gaseous refrigerant into medium-temperature and high-pressure liquid refrigerant.

[0017] In some implementations, an air outlet grille is provided in the air outlet.

[0018] In some implementation schemes, two handles are provided on the outer wall of the outer housing, and the two handles are respectively located on two opposite sides of the outer housing.

[0019] The second aspect of the present application provides an air conditioning method, which is applied to the air conditioning device provided in the first aspect of the present application, and the air conditioning method includes: a first refrigeration pipe transports the low-temperature and low-pressure liquid refrigerant provided by the outdoor unit to the main evaporator; the internal fan sucks the hot air from the outside into the inner casing from the air inlet, and makes the hot air flow to the main evaporator; the main evaporator uses the low-temperature and low-pressure liquid refrigerant to absorb the heat of the hot air to convert the hot air into cold air, so that the cold air enters the workshop through the air supply port, the air duct and the through hole in turn, and vaporizes the low-temperature and low-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant; the second refrigeration pipe transports the low-temperature and low-pressure gaseous refrigerant to the outdoor unit, so that the outdoor unit converts the low-temperature and low-pressure gaseous refrigerant into a low-temperature and low-pressure liquid refrigerant.

[0020] The air conditioning device provided in the first aspect of the present application is composed of an indoor unit and an outdoor unit. The outdoor unit is arranged on the outer wall of a building. The building has an equipment room and a workshop located next to the equipment room. The equipment room has a ventilation window connected to the outside of the building. The equipment room and the workshop are separated by a wall. The indoor unit is arranged in the equipment room and close to the wall. The indoor unit includes an inner casing, a main evaporator, an inner fan, a wind tube, a first refrigeration pipe and a second refrigeration pipe. The main evaporator is arranged in the inner casing and located at the top. An air supply port connected to the interior is opened on the outer wall of the inner casing close to the wall. The air supply outlet corresponds to the main evaporator, and a through hole connecting the workshop and the equipment room is opened on the wall. One end of the air duct is connected to the air supply outlet, and the other end is connected to the through hole. The internal fan is arranged in the inner casing and is located at the bottom. An air inlet connected to the interior is opened on the outer wall of the inner casing away from the wall. The air inlet corresponds to the internal fan. The first refrigeration pipe and the second refrigeration pipe are both arranged in the inner casing. One end of the first refrigeration pipe is connected to the main evaporator, and the other end passes through the inner casing and is connected to the outdoor unit. One end of the second refrigeration pipe is connected to the main evaporator, and the other end passes through the inner casing and is connected to the outdoor unit. In actual applications, the first refrigerant pipe can transport the low-temperature and low-pressure liquid refrigerant provided by the outdoor unit to the main evaporator. The internal fan can suck the hot air from the outside into the inner casing through the air inlet and make the hot air flow to the main evaporator. The main evaporator can use the low-temperature and low-pressure liquid refrigerant to absorb the heat of the hot air to convert the hot air into cold air. The cold air will enter the workshop through the air supply port, wind pipe and through hole in turn to reduce the temperature in the workshop. In the process of the main evaporator converting the hot air into cold air, the low-temperature and low-pressure liquid refrigerant will vaporize into low-temperature and low-pressure gaseous refrigerant. The second refrigerant pipe can transport the low-temperature and low-pressure gaseous refrigerant to the outdoor unit so that the outdoor unit can convert the low-temperature and low-pressure gaseous refrigerant into low-temperature and low-pressure liquid refrigerant, and the cycle will continue. It can be seen from this that when the present application cools the workshop, it will not suck the air in the workshop into the inner casing, but will suck the hot air from the outside (i.e., fresh air) into the inner casing. Then, pollutants such as graphite, iron powder, oil stains, dust, etc. in the workshop will not enter the inner casing, and the main evaporator and internal fan in the inner casing will not be attached to these pollutants. In this way, frequent disassembly and cleaning can be avoided, which greatly reduces the workload and loss of manpower and material resources during equipment maintenance, which can not only improve production efficiency and cost, but also ensure the health of personnel.

[0021] The air conditioning method provided in the second aspect of the present application is implemented based on the air conditioning device provided in the first aspect of the present application, so it has all the advantages of the air conditioning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the related technologies or the embodiments of the present application, the drawings required for use in the description of the related technologies or the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, not all embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of an air conditioning device provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of an indoor unit provided in an embodiment of the present application;

[0025] Figure 3 A side view of an indoor unit provided in an embodiment of the present application;

[0026] Figure 4 Provided in the embodiments of this application Figure 2 A partial enlarged view of the middle A;

[0027] Figure 5 A schematic diagram of the structure of an outdoor unit provided in an embodiment of the present application;

[0028] Figure 6 A side view of an outdoor unit provided in an embodiment of the present application;

[0029] Figure 7 A schematic flow chart of an air conditioning method provided in an embodiment of the present application.

[0030] The symbols in the above drawings represent:

[0031] 100-indoor unit, 200-outdoor unit, 101-inner casing, 102-main evaporator, 103-inner fan, 104-air duct, 105-first refrigeration pipe, 106-second refrigeration pipe, 107-water tray, 108-water pipe, 109-water tank, 110-filter, 111-auxiliary evaporator, 112-circulating water pump, 113-water pipe, 114-return pipe, 115-controller, 116-heat exchange Tube, 117-first heat transfer tube, 118-second heat transfer tube, 119-temperature detector, 120-first electric valve, 121-second electric valve, 122-filter, 1011-air supply port, 1012-air inlet, 1013-maintenance window, 1014-drain outlet, 1091-drain hole, 201-outer casing, 202-hand buckle, 203-junction box, 2011-air inlet, 2012-air outlet. DETAILED DESCRIPTION

[0032] In the related art, for a workshop where mechanical processing is carried out, the air therein is often mixed with pollutants such as graphite, iron powder, oil, dust, etc. These pollutants will enter the refrigeration equipment during the process of the refrigeration equipment sucking in the air in the workshop, and adhere to the evaporator, filter and other components in the refrigeration equipment. In the long run, the evaporator will be blocked and the refrigeration equipment will not be able to work normally. Therefore, it is necessary to frequently disassemble and clean the refrigeration equipment manually or by hiring a professional cleaning company, and after the cleaning is completed, it is necessary to install the equipment, which is a very large project and requires a lot of manpower and material resources; in addition, during the process of disassembling and cleaning the refrigeration equipment, the temperature in the workshop will be very high, so that work has to be stopped, which not only reduces production efficiency, but also increases production costs. Moreover, the pollutants attached to the evaporator, filter and other components during the cleaning process are not easy to collect. These pollutants will enter the human body with human breathing, which is not conducive to human health. In view of this, the present application proposes an air conditioning device and method in the following embodiments to solve the above-mentioned drawbacks existing in the related art.

[0033] In order to make the purpose, technical solutions and advantages of the present application more obvious and easy to understand, the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. It should be understood that the embodiments of the present application described below are only used to explain the present application and are not used to limit the present application, that is, based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0034] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 It is a structural diagram of an air conditioning device. Figure 2 This is the structural diagram of the indoor unit. Figure 3This embodiment provides an air conditioning device, including an indoor unit 100 and an outdoor unit 200, the outdoor unit 200 is used to be installed on the outer wall of a building, the building has an equipment room and a workshop located next to the equipment room, the equipment room and the workshop are separated by a wall, the indoor unit 100 is arranged in the equipment room and close to the wall, the equipment room has a ventilation window connected to the outside of the building, the ventilation window can ensure the connectivity between the equipment room and the outside of the building, and facilitate the fresh air outside the building to flow into the equipment room at any time. Specifically, the indoor unit 100 includes an inner casing 101, a main evaporator 102, an inner fan 103, an air duct 104, a first refrigeration pipe 105 and a second refrigeration pipe 106. The main evaporator 102 is arranged in the inner casing 101 and is located above the inner casing 101. An air supply port 1011 connected to the interior is opened on the outer wall of the inner casing 101 close to the wall. The air supply port 1011 corresponds to the main evaporator 102. A through hole connecting the workshop and the equipment room is opened on the wall. The air duct 104 is located between the inner casing 101 and the wall. One end of the air duct 104 is connected to the air supply port 1011 and the other end is connected to the air supply port 1011. The inner fan 103 is connected to the through hole, and is arranged in the inner casing 101 and is located below the inner casing 101. An air inlet 1012 communicating with the interior is provided on the outer wall of the inner casing 101 away from the wall, and the air inlet 1012 corresponds to the inner fan 103. The first refrigeration pipe 105 and the second refrigeration pipe 106 are both arranged in the inner casing 101. One end of the first refrigeration pipe 105 is connected to the main evaporator 102, and the other end passes through the inner casing 101 and is connected to the outdoor unit 200. One end of the second refrigeration pipe 106 is connected to the main evaporator 102, and the other end passes through the inner casing 101 and is connected to the outdoor unit 200. Preferably, the air cylinder 104 is configured to be detachable and retractable, and has higher flexibility.

[0035] In this embodiment, the first refrigeration pipe 105 is used to transport the low-temperature and low-pressure liquid refrigerant provided by the outdoor unit 200 to the main evaporator 102; the internal fan 103 is used to suck the hot air from the outside into the inner casing 101 through the air inlet 1012, and make the hot air flow to the main evaporator 102; the main evaporator 102 is used to use the low-temperature and low-pressure liquid refrigerant to absorb the heat of the hot air to convert the hot air into cold air, and vaporize the low-temperature and low-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant; the cold air is used to enter the workshop through the air supply port 1011, the air duct 104 and the through hole in sequence; the second refrigeration pipe 106 is used to transport the low-temperature and low-pressure gaseous refrigerant to the outdoor unit 200; the outdoor unit 200 is used to convert the low-temperature and low-pressure gaseous refrigerant into a low-temperature and low-pressure liquid refrigerant. That is to say, in the actual air conditioning process, the first refrigerant pipe 105 can transport the low-temperature and low-pressure liquid refrigerant provided by the outdoor unit 200 to the main evaporator 102, and the internal fan 103 can suck the hot air from the outside into the inner casing 101 through the air inlet 1012 and make the hot air flow to the main evaporator 102. The main evaporator 102 can use the low-temperature and low-pressure liquid refrigerant to absorb the heat of the hot air to convert the hot air into cold air. The cold air will enter the workshop through the air supply port 1011, the air duct 104 and the through hole in turn to reduce the temperature in the workshop. In the process of the main evaporator 102 converting the hot air into cold air, the low-temperature and low-pressure liquid refrigerant will vaporize into a low-temperature and low-pressure gaseous refrigerant. The second refrigerant pipe 106 can transport the low-temperature and low-pressure gaseous refrigerant to the outdoor unit 200. The outdoor unit 200 can first convert the low-temperature and low-pressure gaseous refrigerant into a low-temperature and low-pressure liquid refrigerant, and then transport the low-temperature and low-pressure liquid refrigerant to the main evaporator 102 through the first refrigerant pipe 105. Such a cycle can achieve continuous cooling of the workshop. It is not difficult to see from the above air conditioning process that the air supply port 1011 is set in the same direction as the main evaporator 102, but the setting direction of both is opposite to the internal fan 103, which is convenient for inhaling fresh air and facilitating installation and maintenance.

[0036] In this embodiment, an insulation layer is provided on the outer surface of the air duct 104. The insulation layer can be made of any material with insulation function commonly used in the art, such as rubber and plastic insulation wool, glass wool, rock wool, polyurethane foam insulation material, polystyrene foam board (EPS and XPS), phenolic foam insulation material, etc., which can be selected according to actual needs, and this embodiment does not make a sole limitation on this. An air inlet grille is provided in the air inlet 1012. The air inlet grille is a mesh structure composed of a group of parallel bars, wooden bars, metal bars or plastic bars, etc., so that the hot air from the outside can be drawn into the inner casing 101 by the inner fan 103, and dust from the outside can be prevented from entering the inner casing 101 to the greatest extent. The main evaporator 102 can be any evaporator commonly used in the art, such as a coil evaporator, a plate evaporator, a shell and tube evaporator, etc., which can be selected according to actual needs, and this embodiment does not make a sole limitation on this. In addition, the internal fan 103 of this embodiment is composed of components such as an impeller and a motor. Since the technology of fans in this field is very mature, this embodiment does not elaborate on the structure and working principle of the internal fan 103.

[0037] In this embodiment, when controlling the operation of the main evaporator 102, the internal fan 103, etc., manual control or automatic control, or even a combination of manual control and automatic control, can be used. The specific selection can be based on actual needs, and this embodiment does not make a sole limitation on this. Preferably, in order to improve the intelligence and automation of the air conditioning device, the operation of the main evaporator 102, the internal fan 103, etc. is controlled in an automatic manner. Of course, it is not limited to the main evaporator 102 and the internal fan 103. For the auxiliary evaporator 111, the circulating water pump 112, the compressor, the condenser, the throttle, the first electric valve 120, the second electric valve 121, etc. described below, their operations are also controlled in an automatic manner. Based on this, when the automatic control method is adopted, the indoor unit 100 includes, in addition to the structure given above, a controller 115. The main evaporator 102, the indoor fan 103, the auxiliary evaporator 111, the circulating water pump 112, the compressor, the condenser, the throttle, the first electric valve 120 and the second electric valve 121 are all communicatively connected to the controller 115 so that the operation of these components can be controlled by the controller 115; illustratively, temperature sensors can be installed at different positions in the inner casing 101, and the controller 115 can compare the temperature sensed by each temperature sensor with a preset temperature value, and control these components according to the comparison result, so as to finally achieve the purpose of making the temperature in the workshop meet the expected requirements.

[0038] In addition, it should be noted that the controller 115 of this embodiment can be set on the inner wall of the inner housing 101, or on the outer wall of the inner housing 101, or even need not be set on the indoor unit 100, which can be selected according to actual needs, and this embodiment does not make a sole limitation on this. It should also be noted that the controller 115 of this embodiment can adopt any device commonly used in the art with control and data processing and analysis functions, such as a small computer, a microcontroller such as a single-chip microcomputer, an industrial control computer (IPC), a programmable logic controller (PLC), a distributed control system (DCS), etc., which can be selected according to actual needs, and this embodiment does not make a sole limitation on this. Preferably, a touch screen can be set on the outer wall of the inner housing 101 away from the wall, and the touch screen is connected to the controller 115 for communication. The controller 115 can display all parameters during the operation of the air conditioning device on the touch screen, and the staff can also issue control instructions to the controller 115 through the touch screen, such as issuing a power-on instruction, a power-off instruction, and an adjustment instruction for the temperature in the workshop.

[0039] As can be seen from the above, when the present embodiment is cooling the workshop, the air in the workshop will not be sucked into the inner casing 101, but the hot air from the outside (i.e., fresh air) will be sucked into the inner casing 101, so that pollutants such as graphite, iron powder, oil, dust, etc. in the workshop will not enter the inner casing 101, and the main evaporator 102, the inner fan 103, etc. in the inner casing 101 will not be attached to these pollutants, so that frequent disassembly and cleaning can be avoided, which greatly reduces the workload and loss of manpower and material resources during equipment maintenance, which can not only improve production efficiency and cost, but also ensure the health of personnel. In addition, in the process of cooling the workshop, the air conditioning device of the present embodiment can continuously deliver fresh air to the workshop, which is very rich in oxygen, and the staff will not feel uncomfortable working in the workshop for a long time.

[0040] In some embodiments, see Figures 1 to 3In addition to the above-mentioned structure, the indoor unit 100 also includes a water receiving pan 107, a water delivery pipe 108 and a water tank 109. The water receiving pan 107, the water delivery pipe 108 and the water tank 109 are all arranged in the inner casing 101. The water receiving pan 107 is located below the main evaporator 102, and the water tank 109 is located below the indoor fan 103. The water receiving pan 107 and the water tank 109 are connected through the water delivery pipe 108. Specifically, the water receiving pan 107 is used to receive the condensed water dripping from the main evaporator 102 in the process of converting hot air into cold air; the water delivery pipe 108 is used to transport the condensed water in the water receiving pan 107 to the water tank 109; and the water tank 109 is used to store the condensed water. Preferably, the water tank 109 is made of stainless steel, and an insulation layer is provided on the outer surface of the water tank 109. The insulation layer can be made of any material with insulation function commonly used in the field, such as rubber-plastic insulation wool, glass wool, rock wool, polyurethane foam insulation material, polystyrene foam board (EPS and XPS), phenolic foam insulation material, etc. The specific selection can be based on actual needs, and this application does not make the sole limitation to this.

[0041] It is understandable that when the hot air passes through the main evaporator 102, since the main evaporator 102 contains a low-temperature and low-pressure liquid refrigerant, the surface temperature of the main evaporator 102 is very low, generally lower than the dew point temperature of the hot air, so that the water vapor in the hot air undergoes a phase change when it is cooled and changes from a gaseous state to a liquid state, and then condenses into small water droplets (i.e., condensed water) on the surface of the main evaporator 102. These small water droplets will gradually gather and grow larger, and eventually drip from the main evaporator 102 under the action of gravity. Therefore, the present application is provided with a water receiving tray 107, a water delivery pipe 108 and a water tank 109, and the water receiving tray 107 is used to receive the condensed water dripping from the main evaporator 102, and the condensed water in the water receiving tray 107 is transported to the water tank 109 through the water delivery pipe 108 for storage, so that the condensed water dripping from the main evaporator 102 can be prevented from damaging other components in the inner casing 101 (such as the inner fan 103, etc.).

[0042] As one or more embodiments thereof, the indoor unit 100 further includes a drain pipe, a drain hole 1091 communicating with the interior is provided on the outer wall of the water tank 109, the drain hole 1091 is located above the water tank 109, the drain pipe is disposed in the inner casing 101, one end of the drain pipe is connected to the drain hole 1091, and the other end passes through the inner casing 101. Specifically, the drain pipe is used to discharge excess condensed water in the water tank 109 to the outside of the inner casing 101 when the water level of the condensed water in the water tank 109 exceeds the drain hole 1091.

[0043] It is understandable that although the water tank 109 can store the condensed water dripping from the main evaporator 102, the capacity of the water tank 109 is limited. As the air conditioning device continues to work, the condensed water inside the water tank 109 will increase. If some measures are not designed for the water tank 109 to automatically discharge the condensed water, it is necessary to manually and regularly handle the condensed water in the water tank 109, which is very troublesome. Therefore, the present application opens a drain hole 1091 above the water tank 109, and connects the drain hole 1091 to the outside of the inner casing 101 through a drain pipe. When the water level of the condensed water in the water tank 109 rises to the drain hole 1091, the excess condensed water in the water tank 109 will flow to the outside of the inner casing 101 through the drain hole 1091 and the drain pipe, thereby realizing the automatic discharge of the condensed water in the water tank 109 when there is too much condensed water. In this way, there is no need to manually and regularly handle the condensed water in the water tank 109, which reduces the workload of the staff. Preferably, the distance between the drainage hole 1091 and the top of the water tank 109 is one tenth of the height of the water tank 109 .

[0044] As one or more embodiments thereof, the indoor unit 100 further includes an auxiliary evaporator 111, a circulating water pump 112, a water supply pipe 113, and a water return pipe 114 disposed in the inner housing 101. The auxiliary evaporator 111 is located between the indoor fan 103 and the air inlet 1012. One end of the water supply pipe 113 is connected to the water tank 109, and the other end is connected to the auxiliary evaporator 111 through the circulating water pump 112. Both ends of the water return pipe 114 are respectively connected to the water tank 109 and the auxiliary evaporator 111. Specifically, the circulating water pump 112 is used to pump the condensed water in the water tank 109 to the auxiliary evaporator 111 through the water supply pipe 113; the auxiliary evaporator 111 is used to absorb the heat of the hot air using the condensed water before the hot air flows to the main evaporator 102; and the water return pipe 114 is used to transport the condensed water after absorbing heat in the auxiliary evaporator 111 back to the water tank 109.

[0045] That is to say, in the actual air conditioning process, the present application can effectively utilize the condensed water stored in the water tank 109, that is, by setting a circulating water pump 112, a water supply pipe 113 and a return pipe 114, the circulation flow of the condensed water between the water tank 109 and the auxiliary evaporator 111 is realized. Since the auxiliary evaporator 111 is located between the inner fan 103 and the air inlet 1012, the hot air entering the inner casing 101 from the air inlet 1012 is bound to flow through the auxiliary evaporator 111 first, and then flow through the main The auxiliary evaporator 111 is used for the hot air flow through the auxiliary evaporator 102, and in the process of the hot air flowing through the auxiliary evaporator 111, since the temperature of the condensed water inside the auxiliary evaporator 111 is relatively low, the heat of the hot air will be absorbed by the condensed water in the auxiliary evaporator 111, thereby realizing the pre-cooling of the hot air before the hot air flows to the main evaporator 102, which can greatly reduce the time for the subsequent main evaporator 102 to reduce the hot air to the target temperature, thereby achieving the purpose of energy saving; illustratively, the auxiliary evaporator 111 can reduce the temperature of the hot air to below 30°C.

[0046] In addition, it should be noted that the auxiliary evaporator 111 can adopt any evaporator commonly used in the art, such as a coil evaporator, a plate evaporator, a shell and tube evaporator, etc., which can be selected according to actual needs, and this application does not make a sole limitation on this. It should also be noted that the circulating water pump 112 of this application is composed of components such as an impeller, a motor, a pump casing, a pump shaft, a bearing and a coupling. Since the technology of the circulating water pump 112 in this art is relatively mature, this application does not elaborate on the structure and working principle of the circulating water pump 112. Preferably, since it is necessary to use the condensed water in the water tank 109 to pre-cool the hot air, the cleanliness of the condensed water in the water tank 109 should be ensured, so a filter 110, such as a Y-type filter, can be set on the water pipe 108 to filter the condensed water flowing from the water receiving tray 107 to the water tank 109 through the filter 110, thereby ensuring the cleanliness of the condensed water in the water tank 109.

[0047] In one or more embodiments, please combine Figure 4 , Figure 4 yes Figure 2In the partial enlarged view of the center A, the indoor unit 100 further includes a heat exchange tube 116, a first heat transfer tube 117, a second heat transfer tube 118, a temperature detector 119, a first electric valve 120, and a second electric valve 121 which are communicatively connected to the controller 115. The temperature detector 119 and the heat exchange tube 116 are arranged in the water tank 109 and immersed in the condensed water. The first heat transfer tube 117 and the second heat transfer tube 118 are arranged in the water tank 109. One end of the first heat transfer tube 117 is connected to the heat exchange tube 116, and the other end passes through the water tank 109 and is connected to the first refrigeration tube 105. One end of the second heat transfer tube 118 is connected to the heat exchange tube 116, and the other end passes through the water tank 109 and is connected to the second refrigeration tube 106. The first electric valve 120 and the second electric valve 121 are respectively arranged on the first heat transfer tube 117 and the second heat transfer tube 118. Specifically, the temperature detector 119 is used to detect the water temperature of the condensed water in the water tank 109 in real time. The controller 115 is used to: determine whether the water temperature of the condensed water in the water tank 109 is greater than the preset temperature threshold, and control the first electric valve 120 and the second electric valve 121 to open when the water temperature of the condensed water in the water tank 109 is greater than the preset temperature threshold, so that the heat of the condensed water in the water tank 109 is transferred to the low-temperature and low-pressure liquid refrigerant in the first refrigeration pipe 105 through the heat exchange pipe 116 and the first heat transfer pipe 117 in turn, and the heat of the condensed water in the water tank 109 is transferred to the low-temperature and low-pressure gaseous refrigerant in the second refrigeration pipe 106 through the heat exchange pipe 116 and the second heat transfer pipe 118 in turn to reduce the water temperature; when the water temperature of the condensed water in the water tank 109 is reduced to less than or equal to the preset temperature threshold, the first electric valve 120 and the second electric valve 121 are controlled to close. Preferably, the heat exchange pipe 116 is stacked with multiple layers of annular copper pipes, and the heat exchange effect is better.

[0048] It is understandable that in the actual air conditioning process, the condensed water in the water tank 109 will be continuously transported to the auxiliary evaporator 111 by the circulating water pump 112 and absorb the heat of the hot air, and the condensed water after absorbing heat will flow back to the water tank 109 from the auxiliary evaporator 111. As time goes by, the water temperature of the condensed water in the water tank 109 will become higher and higher. If the water temperature rises to a temperature higher than the temperature of the hot air, the condensed water cannot be used to pre-cool the hot air. Therefore, the present application designs an automatic cooling measure for the condensed water in the water tank 109. The temperature detector 119 in the water tank 109 can detect the water temperature of the condensed water in the water tank 109 in real time and transmit it to the controller 115. When the controller 115 determines that the water temperature of the condensed water in the water tank 109 is higher than the preset temperature threshold, it means that the water temperature of the condensed water in the water tank 109 is higher than the temperature of the hot air. Then the controller 115 will control the first electric valve 120 and the second electric valve 121 to open, so that the first heat transfer pipe 117 and the second heat transfer pipe 118 are both connected. Since the temperatures of the low-temperature and low-pressure liquid refrigerant in the first refrigeration pipe 105 and the low-temperature and low-pressure gaseous refrigerant in the second refrigeration pipe 106 are very low, it can be known from the principle of heat transfer that heat will be transferred from the object with high temperature (i.e., the condensed water in the water tank 109) to the object with low temperature. The low-temperature and low-pressure liquid refrigerant in the first refrigeration tube 105 and the low-temperature and low-pressure gaseous refrigerant in the second refrigeration tube 106 are transferred, thereby lowering the water temperature of the condensed water in the water tank 109. When the water temperature of the condensed water in the water tank 109 is reduced to less than or equal to the preset temperature threshold, it means that the water temperature of the condensed water in the water tank 109 is lower than the temperature of the hot air. At this time, the controller 115 will control the first electric valve 120 and the second electric valve 121 to be closed, until the water temperature of the condensed water in the water tank 109 is greater than the preset temperature threshold again, the controller 115 will control the first electric valve 120 and the second electric valve 121 to be opened again, and the cycle will continue. In this way, it can be ensured that the water temperature of the condensed water in the water tank 109 is always lower than the temperature of the hot air, thereby avoiding the situation where the hot air cannot be pre-cooled.

[0049] In some embodiments, see Figures 1 to 3 In addition to the structure given above, the indoor unit 100 also includes a filter 122, which is arranged in the inner casing 101 and between the auxiliary evaporator 111 and the air inlet 1012, and is used to filter the hot air entering the inner casing 101. That is to say, in the actual air conditioning process, the hot air entering the inner casing 101 from the air inlet 1012 will first flow through the filter 122, and then reach the auxiliary evaporator 111 for pre-cooling. In the process of hot air flowing through the filter 122, the filter 122 can filter out dust particles, hair, fibers, etc. carried by the hot air, thereby preventing them from entering the inner casing 101 and entering the workshop through the inner casing 101.

[0050] In some embodiments, see Figures 1 to 3 A maintenance window 1013 connected to the interior is provided on the outer wall of the inner casing 101 away from the wall. The maintenance window 1013 corresponds to the main evaporator 102. A cover plate is rotatably provided in the maintenance window 1013. The maintenance window 1013 can be opened / closed by rotating the cover plate. In other words, when the main evaporator 102 needs to be cleaned, the cover plate can be rotated to open the maintenance window 1013, and the main evaporator 102 can be cleaned through the maintenance window 1013 without disassembling the inner casing 101, which is very convenient. Preferably, an insulation layer is provided on the inner surface of the cover plate. The insulation layer can be made of any material with insulation function commonly used in the art, such as rubber and plastic insulation wool, glass wool, rock wool, polyurethane foam insulation material, polystyrene foam board (EPS and XPS), phenolic foam insulation material, etc. The specific material can be selected according to actual needs, and this application does not make a sole limitation on this. In addition, a drain port 1014 connected to the interior can be opened on the outer wall of the inner casing 101. The drain port 1014 can be located at the bottom of the inner casing 101. When the main evaporator 102 is cleaned through the maintenance window 1013, the dirty water after cleaning can be discharged to the outside of the inner casing 101 through the drain port 1014.

[0051] In some embodiments, see Figure 5 and Figure 6 , Figure 5 This is the structural diagram of the outdoor unit. Figure 6 The outdoor unit 200 includes an outer casing 201, a junction box 203, a compressor, a condenser, and a throttle. The outer casing 201 is used to be arranged on the outer wall of a building. The compressor, the condenser, and the throttle are all arranged in the outer casing 201. The compressor, the condenser, and the throttle are connected in sequence. The throttle is connected to the main evaporator 102 through the first refrigeration pipe 105, and the compressor is connected to the main evaporator 102 through the second refrigeration pipe 106. The junction box 203 is used to establish a communication connection between the compressor, the condenser, the throttle, etc. and the controller 115. Specifically, the compressor is used to compress the low-temperature and low-pressure gaseous refrigerant transported through the second refrigeration pipe 106 into a high-temperature and high-pressure gaseous refrigerant and transport it to the condenser; the condenser is used to liquefy the high-temperature and high-pressure gaseous refrigerant into a medium-temperature and high-pressure liquid refrigerant and transport it to the throttle; the throttle is used to convert the medium-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure liquid refrigerant, and transport the low-temperature and low-pressure liquid refrigerant to the main evaporator 102 through the first refrigeration pipe 105.

[0052] As one or more embodiments, an air inlet 2011 and an air outlet 2012 communicating with the interior are provided on the outer wall of the outer casing 201, the air inlet 2011 and the air outlet 2012 are respectively located on opposite sides of the outer casing 201, the air inlet 2011 and the air outlet 2012 are opposite, the condenser is located between the air inlet 2011 and the air outlet 2012, and the outdoor unit 200 further includes an external fan, which is arranged in the outer casing 201 and located between the air inlet 2011 and the condenser. Specifically, the external fan is used to suck the outside air into the outer casing 201 from the air inlet 2011, and make the air entering the outer casing 201 flow through the condenser and flow out from the air outlet 2012; the condenser is specifically used to dissipate the heat of the high-temperature and high-pressure gaseous refrigerant into the outside air, so as to liquefy the high-temperature and high-pressure gaseous refrigerant into the medium-temperature and high-pressure liquid refrigerant. Preferably, an air outlet grille is provided in the air outlet 2012, and the air outlet grille is a mesh structure composed of a group of parallel bars, wooden bars, metal bars or plastic bars, etc., so that the external air can be circulated in the outer casing 201, and the external dust can be prevented from entering the outer casing 201 to the greatest extent. In addition, two hand buckles 202 can be provided on the outer wall of the outer casing 201, and the two hand buckles 202 are respectively located on the opposite sides of the outer casing 201. When the outdoor unit 200 needs to be disassembled, the staff can move the outdoor unit 200 through the hand buckles 202. It should be noted that the structure and working principle of the outdoor unit 200 are the same as those of the outdoor unit of the split air conditioner, so this application does not make too much description on the structure and working principle of the outdoor unit 200.

[0053] See also Figure 7 , Figure 7 : is a flow chart of an air conditioning method. This embodiment provides an air conditioning method, which is applied in the air conditioning device described above, that is, the air conditioning method is implemented based on the air conditioning device described above, and the air conditioning method includes steps 701 to 704 (abbreviated as S701 to S704), namely: S701, the first refrigerant pipe delivers the low-temperature and low-pressure liquid refrigerant provided by the outdoor unit to the main evaporator; S702, the internal fan sucks the hot air from the outside into the inner casing from the air inlet and makes the hot air flow to the main evaporator; S703, the main evaporator uses the low-temperature and low-pressure liquid refrigerant to absorb the heat of the hot air to convert the hot air into cold air, so that the cold air enters the workshop through the air supply port, the air duct and the through hole in turn, and vaporizes the low-temperature and low-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant; S704, the second refrigerant pipe delivers the low-temperature and low-pressure gaseous refrigerant to the outdoor unit so that the outdoor unit converts the low-temperature and low-pressure gaseous refrigerant into a low-temperature and low-pressure liquid refrigerant. It should be noted that, for any incomplete description of the air conditioning method, please refer to the previous description of the air conditioning device, and this embodiment will not be elaborated here.

[0054] The above embodiments are only preferred implementations of the present application, and they are not the only limitations on air conditioning devices and related methods; in this regard, those skilled in the art can flexibly set them according to the actual application scenarios based on the above embodiments. It can be understood that through the implementation of the above embodiments of the present application, an air conditioning device is formed by using an indoor unit 100 and an outdoor unit 200, and the outdoor unit 200 is arranged on the outer wall of a building. The building has an equipment room and a workshop located next to the equipment. The equipment room has a ventilation window connected to the outside of the building. The equipment room and the workshop are separated by a wall. The indoor unit 100 is arranged in the equipment room and close to the wall. The indoor unit 100 includes an inner casing 101, a main evaporator 102, an inner fan 103, an air duct 104, a first refrigeration pipe 105 and a second refrigeration pipe 106. The main evaporator 102 is arranged in the inner casing 101 and is located at the top. An air supply port 1011 connected to the interior is provided on the outer wall of the inner casing 101 close to the wall. The air supply port 1011 is connected to the inner casing 101. Corresponding to the main evaporator 102, a through hole connecting the workshop and the equipment room is opened on the wall, one end of the air duct 104 is connected to the air supply port 1011, and the other end is connected to the through hole, the internal fan 103 is arranged in the inner casing 101 and is located at the bottom, and an air inlet 1012 connected to the interior is opened on the outer wall of the inner casing 101 away from the wall, and the air inlet 1012 corresponds to the internal fan 103, the first refrigerant pipe 105 and the second refrigerant pipe 106 are both arranged in the inner casing 101, one end of the first refrigerant pipe 105 is connected to the main evaporator 102, and the other end passes through the inner casing 101 and is connected to the outdoor unit 200, one end of the second refrigerant pipe 106 is connected to the main evaporator 102, and the other end passes through the inner casing 101 and is connected to the outdoor unit 200. In the actual air conditioning process, the first refrigerant pipe 105 can transport the low-temperature and low-pressure liquid refrigerant provided by the outdoor unit 200 to the main evaporator 102, and the internal fan 103 can suck the hot air from the outside into the inner casing 101 through the air inlet 1012 and make the hot air flow to the main evaporator 102. The main evaporator 102 can use the low-temperature and low-pressure liquid refrigerant to absorb the heat of the hot air to convert the hot air into cold air. The cold air will enter the workshop through the air supply port 1011, the air duct 104 and the through hole in turn to reduce the temperature in the workshop. In the process of the main evaporator 102 converting the hot air into cold air, the low-temperature and low-pressure liquid refrigerant will vaporize into a low-temperature and low-pressure gaseous refrigerant. The second refrigerant pipe 106 can transport the low-temperature and low-pressure gaseous refrigerant to the outdoor unit 200, so that the outdoor unit 200 can convert the low-temperature and low-pressure gaseous refrigerant into a low-temperature and low-pressure liquid refrigerant. Such a cycle can achieve continuous cooling in the workshop.It can be seen that when the present application cools the workshop, the air in the workshop will not be sucked into the inner casing 101, but the hot air from the outside (i.e., fresh air) will be sucked into the inner casing 101. Then, pollutants such as graphite, iron powder, oil, dust, etc. in the workshop will not enter the inner casing 101, and the main evaporator 102, the internal fan 103, etc. in the inner casing 101 will not be attached with these pollutants. In this way, frequent disassembly and cleaning can be avoided, which greatly reduces the workload and loss of manpower and material resources during equipment maintenance, which can not only improve production efficiency and cost, but also ensure the health of personnel.

[0055] It should be noted that the several embodiments shown in the present application above are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can refer to each other. It should also be noted that in the text description of the present application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is such an actual relationship or order between these entities or operations. Further, the terms "include", "comprise" or any other corresponding variants are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only these elements, but also other elements that are not explicitly listed, or may also include elements inherent to such a process, method, article or device; and, in the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] In addition, by implementing the several embodiments shown above in the present application, professionals and technicians in this field can implement or use the present application. For the several embodiments shown above in the present application, various modifications will be obvious to professionals and technicians in this field, and the general principles defined in the present application can be implemented in other embodiments not shown without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the several embodiments shown above, but will conform to the widest range consistent with the principles and novel features disclosed in the present application.

Claims

1. An air conditioning device, comprising an indoor unit and an outdoor unit, wherein the outdoor unit is arranged on an outer wall of a building, characterized in that: The building has an equipment room and a workshop located next to the equipment room. The equipment room is separated from the workshop by a wall. The equipment room has a ventilation window connected to the outside of the building. The indoor unit is arranged in the equipment room and close to the wall. The indoor unit includes an inner casing, a main evaporator, an inner fan, a wind pipe, a first refrigeration pipe and a second refrigeration pipe. The main evaporator is arranged in the inner casing and located above the inner casing. An air supply port connected to the interior is opened on the outer wall of the inner casing close to the wall. The air supply port corresponds to the main evaporator. The wall is provided with a ventilation window connecting the workshop and the indoor unit. A through hole between the equipment, one end of the air duct is connected to the air supply port, and the other end is connected to the through hole, the internal fan is arranged in the internal casing and is located below the internal casing, an air inlet connected to the interior is opened on the outer wall of the internal casing away from the wall, and the air inlet corresponds to the internal fan, the first refrigeration pipe and the second refrigeration pipe are both arranged in the internal casing, one end of the first refrigeration pipe is connected to the main evaporator, and the other end passes through the internal casing and is connected to the outdoor unit, and one end of the second refrigeration pipe is connected to the main evaporator, and the other end passes through the internal casing and is connected to the outdoor unit; The first refrigeration pipe is used to transport the low-temperature and low-pressure liquid refrigerant provided by the outdoor unit to the main evaporator; the internal fan is used to suck the hot air from the outside into the inner casing through the air inlet, and make the hot air flow to the main evaporator; the main evaporator is used to use the low-temperature and low-pressure liquid refrigerant to absorb the heat of the hot air to convert the hot air into cold air, and vaporize the low-temperature and low-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant; The cold air is used to enter the workshop through the air supply port, the air duct and the through hole in sequence; the second refrigeration pipe is used to transport the low-temperature and low-pressure gaseous refrigerant to the outdoor unit; the outdoor unit is used to convert the low-temperature and low-pressure gaseous refrigerant into the low-temperature and low-pressure liquid refrigerant.

2. The air conditioning device according to claim 1, characterized in that: The indoor unit further comprises a water receiving pan, a water delivery pipe and a water tank, wherein the water receiving pan, the water delivery pipe and the water tank are all arranged in the inner casing, the water receiving pan is located below the main evaporator, the water tank is located below the indoor fan, and the water receiving pan and the water tank are connected through the water delivery pipe; The water receiving pan is used to receive the condensed water dripping from the main evaporator during the process of converting the hot air into the cold air; the water pipe is used to transport the condensed water in the water receiving pan to the water tank; and the water tank is used to store the condensed water.

3. The air conditioning device according to claim 2, characterized in that: The indoor unit further includes a filter, which is disposed on the water delivery pipe and is used to filter the condensed water flowing from the water receiving tray to the water tank.

4. The air conditioning device according to claim 2, characterized in that: The indoor unit further includes a drain pipe, a drain hole communicating with the interior is opened on the outer wall of the water tank, the drain hole is located above the water tank, the drain pipe is arranged in the inner casing, one end of the drain pipe is connected to the drain hole, and the other end passes through the inner casing; The drain pipe is used to discharge the excess condensed water in the water tank to the outside of the inner casing when the water level of the condensed water in the water tank exceeds the drain hole.

5. The air conditioning device according to claim 2, characterized in that: The indoor unit further comprises an auxiliary evaporator, a circulating water pump, a water supply pipe and a water return pipe arranged in the inner casing, the auxiliary evaporator is located between the indoor fan and the air inlet, one end of the water supply pipe is connected to the water tank, and the other end is connected to the auxiliary evaporator through the circulating water pump, and both ends of the water return pipe are connected to the water tank and the auxiliary evaporator respectively; The circulating water pump is used to pump the condensed water in the water tank to the auxiliary evaporator through the water supply pipe; the auxiliary evaporator is used to absorb the heat of the hot air using the condensed water before the hot air flows to the main evaporator; the return water pipe is used to transport the condensed water after absorbing heat in the auxiliary evaporator back to the water tank.

6. The air conditioning device according to claim 5, characterized in that: The indoor unit further includes a controller, a heat exchange tube, a first heat transfer tube, a second heat transfer tube, a temperature detector connected to the controller, a first electric valve, and a second electric valve. The temperature detector and the heat exchange tube are both arranged in the water tank and immersed in the condensed water. The first heat transfer tube and the second heat transfer tube are both arranged in the water tank. One end of the first heat transfer tube is connected to the heat exchange tube, and the other end passes through the water tank and is connected to the first refrigeration tube. One end of the second heat transfer tube is connected to the heat exchange tube, and the other end passes through the water tank and is connected to the second refrigeration tube. The first electric valve is arranged on the first heat transfer tube, and the second electric valve is arranged on the second heat transfer tube. The temperature detector is used to detect the water temperature of the condensed water in the water tank in real time; The controller is used to: determine whether the water temperature is greater than a preset temperature threshold, and control the first electric valve and the second electric valve to open when the water temperature is greater than the preset temperature threshold, so that the heat of the condensed water in the water tank is transferred to the low-temperature and low-pressure liquid refrigerant in the first refrigeration tube through the heat exchange tube and the first heat transfer tube in sequence, and the heat of the condensed water in the water tank is transferred to the low-temperature and low-pressure gaseous refrigerant in the second refrigeration tube through the heat exchange tube and the second heat transfer tube in sequence, so as to reduce the water temperature; When the water temperature drops to less than or equal to the preset temperature threshold, the first electric valve and the second electric valve are controlled to be closed.

7. The air conditioning device according to claim 2, characterized in that: A maintenance window communicating with the interior is provided on the outer wall of the inner casing away from the wall, the maintenance window corresponds to the main evaporator, and a cover plate is rotatably arranged in the maintenance window.

8. The air conditioning device according to claim 1, characterized in that: The outdoor unit comprises an outer casing, a compressor, a condenser and a throttle, wherein the outer casing is used to be arranged on the outer wall, the compressor, the condenser and the throttle are all arranged in the outer casing, the compressor, the condenser and the throttle are connected in sequence, the throttle is connected to the main evaporator through the first refrigeration pipe, and the compressor is connected to the main evaporator through the second refrigeration pipe; The compressor is used to compress the low-temperature and low-pressure gaseous refrigerant transported through the second refrigeration pipe into a high-temperature and high-pressure gaseous refrigerant and transport it to the condenser; the condenser is used to liquefy the high-temperature and high-pressure gaseous refrigerant into a medium-temperature and high-pressure liquid refrigerant and transport it to the throttle; the throttle is used to convert the medium-temperature and high-pressure liquid refrigerant into the low-temperature and low-pressure liquid refrigerant, and transport it to the main evaporator through the first refrigeration pipe.

9. The air conditioning device according to claim 8, characterized in that: An air inlet and an air outlet communicating with the interior are provided on the outer wall of the outer casing, the air inlet and the air outlet are respectively located on opposite sides of the outer casing, the air inlet is opposite to the air outlet, the condenser is located between the air inlet and the air outlet, and the outdoor unit further includes an external fan, which is arranged in the outer casing and located between the air inlet and the condenser; The external fan is used to suck the outside air into the outer casing from the air inlet, and make the air entering the outer casing flow through the condenser and flow out from the air outlet; the condenser is specifically used to dissipate the heat of the high-temperature and high-pressure gaseous refrigerant to the outside air, so as to liquefy the high-temperature and high-pressure gaseous refrigerant into the medium-temperature and high-pressure liquid refrigerant.

10. An air conditioning method, characterized in that: The air conditioning device according to any one of claims 1 to 9 comprises: The first refrigerant pipe delivers the low-temperature and low-pressure liquid refrigerant provided by the outdoor unit to the main evaporator; The internal fan draws hot air from the outside into the inner casing through the air inlet, and makes the hot air flow toward the main evaporator; The main evaporator uses the low-temperature and low-pressure liquid refrigerant to absorb the heat of the hot air to convert the hot air into cold air, so that the cold air enters the workshop through the air supply port, the air cylinder and the through hole in sequence, and vaporizes the low-temperature and low-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant; The second refrigeration pipe transports the low-temperature and low-pressure gaseous refrigerant to the outdoor unit so that the outdoor unit converts the low-temperature and low-pressure gaseous refrigerant into the low-temperature and low-pressure liquid refrigerant.

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