Variable-frequency constant-temperature constant-humidity air conditioning unit capable of realizing precooling, preheating and reheating

Abstract

The utility model discloses a variable frequency constant temperature and humidity air conditioning unit capable of realizing precooling, preheating and reheating, which comprises an air conditioning unit and a heat exchange pipe, one side of the air conditioning unit is fixedly connected with a shell, the heat exchange pipe is arranged on the inner side of the shell, the variable frequency constant temperature and humidity air conditioning unit further comprises an air inlet pipe, an air outlet pipe, a guide pipe and a temperature sensor, the air inlet pipe and the air outlet pipe communicate with the air inlet end and the air outlet end of the heat exchange pipe correspondingly, the air inlet pipe horizontally penetrates through and is fixedly installed on the upper portion of one side of the shell, and the temperature sensor can detect the temperature of air guided into the air outlet pipe by the heat exchange pipe. A corresponding controller can control the first electromagnetic valve to be closed and open the second electromagnetic valve at the same time, and unqualified preheated air can be guided into the heat exchange pipe again through the air inlet end of the heat exchange pipe through the guide pipe for reheating operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioning units, and in particular relates to a variable frequency constant temperature and humidity air conditioning unit capable of realizing precooling, preheating and reheating. Background Art

[0002] At present, the "cooling and dehumidification-auxiliary heating" method is widely used in constant temperature and humidity air-conditioning units to adjust the temperature and humidity of the air. Cooling and dehumidification are to make the supplied air meet the humidity requirements, and auxiliary heating is to make the supplied air meet the temperature requirements.

[0003] After searching, the publication number is CN213983785U, which discloses a three-pipe DC variable frequency constant temperature and humidity air-conditioning unit, including an outdoor unit, an indoor unit, a common pipe for hot and cold air, a hot air pipe, and a liquid pipe; the outdoor unit includes a first port, a second port and a third port; the indoor unit includes a fourth port, a fifth port and a sixth port; the first port is connected to the fourth port through the common pipe for hot and cold air; the indoor unit and the outdoor unit are connected by three pipes, namely, the common pipe for hot and cold air, the hot air pipe, and the liquid pipe, which can reduce operating costs, utilize the heat of the air-conditioning unit system for heat recovery, and improve energy utilization.

[0004] In the process of realizing the utility model, the inventors found that there are at least the following problems in the prior art that have not been solved: in the above case, during use, the heat of the air-conditioning unit system is only recovered for preheating, but it cannot ensure that the preheated air meets the standards and cannot be reheated.

[0005] Therefore, a variable frequency constant temperature and humidity air conditioning unit capable of precooling, preheating and reheating is proposed to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a variable frequency constant temperature and humidity air conditioning unit capable of realizing precooling, preheating and reheating, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a variable frequency constant temperature and humidity air-conditioning unit capable of pre-cooling, preheating and reheating, comprising an air-conditioning unit and a heat exchange tube, one side of the air-conditioning unit is fixedly connected to a shell, the heat exchange tube is placed on the inner side of the shell, and also comprises an air inlet pipe, an air outlet pipe, a duct and a temperature sensor, the heat exchange tube is serpentine, the air inlet pipe and the air outlet pipe are respectively connected to the air inlet end and the air outlet end of the heat exchange tube, the air inlet pipe horizontally penetrates and is fixedly installed on the upper side of one side of the shell, the air outlet end of the duct is connected to the heat exchange tube and is close to the air inlet pipe, the air inlet end of the duct is connected to the air outlet pipe, the temperature sensor is fixedly connected to the inside of the air outlet pipe, the inside of the air inlet pipe is rotatably connected to an adjustment plate, and the adjustment plate matches the size of the air inlet pipe.

[0008] As a preferred implementation, a first solenoid valve is disposed inside the air outlet duct, and the temperature sensor is placed between the air inlet end of the duct and the first solenoid valve.

[0009] As a preferred embodiment, a second solenoid valve is provided inside the conduit, a one-way valve is provided inside the heat exchange tube, and the one-way valve is placed between the air outlet end of the conduit and the air inlet pipe.

[0010] As a preferred embodiment, a connecting rod vertically penetrates and is fixedly installed in the middle of the adjustment plate, a servo motor is fixedly connected to the upper surface of the air inlet pipe, and the shaft end of the servo motor is fixedly connected to the top end of the connecting rod.

[0011] As a preferred embodiment, a semiconductor refrigeration plate is penetrated and fixedly installed on the top inner wall of the shell, and an electric heating pipe is fixedly connected to the bottom inner wall of the shell.

[0012] As a preferred implementation, the cold end of the semiconductor refrigeration plate is placed on the inner side of the shell, and the hot end of the semiconductor refrigeration plate is placed on the outer side of the shell.

[0013] As a preferred implementation, a protective frame is fixedly connected to the upper surface of the shell, and a hair dryer is fixedly connected to the upper end of the inner side of the protective frame.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model can pre-cool and pre-heat the air in the heat exchange tube through the combination of semiconductor refrigeration sheet and electric heating tube, and can detect the air temperature introduced into the air outlet pipe by the heat exchange tube through the temperature sensor. When the air preheating fails to meet the standard, the corresponding controller can control the first solenoid valve to close and open the second solenoid valve at the same time, and the air that fails to meet the preheating standard can be re-introduced into the heat exchange tube through the air inlet end of the heat exchange tube for reheating operation. The one-way valve is arranged inside the air inlet end of the heat exchange tube, which can prevent the air in the duct from being discharged through the air inlet pipe.

[0016] According to the utility model, when the temperature sensor detects that the temperature of the preheated air in the heat exchange tube does not meet the standard, the corresponding controller can control the operation of the servo motor, and drive the adjustment plate to rotate in the air inlet pipe through the connecting rod, thereby controlling the air intake volume in the air inlet pipe and further improving the preheating effect of the air in the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model structure;

[0018] Figure 2 It is a schematic diagram of the interior of the shell of the utility model structure;

[0019] Figure 3 This is a schematic diagram of part A of the structure of the utility model.

[0020] In the figure: 1. air conditioning unit; 11. shell; 12. heat exchange tube; 13. air inlet pipe; 14. air outlet pipe; 15. guide tube; 16. temperature sensor; 17. first solenoid valve; 18. second solenoid valve; 2. adjustment plate; 21. connecting rod; 22. servo motor; 23. one-way valve; 3. semiconductor refrigeration plate; 31. electric heating tube; 32. protective frame; 33. hair dryer. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] The following examples are used to illustrate the present invention, but cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0023] See also Figure 1-3 The utility model provides a variable frequency constant temperature and humidity air conditioning unit 1 which can realize precooling, preheating and reheating, including an air conditioning unit 1 and a heat exchange tube 12. A shell 11 is fixedly connected to one side of the air conditioning unit 1. The heat exchange tube 12 is placed on the inner side of the shell 11. It also includes an air inlet pipe 13, an air outlet pipe 14, a conduit 15 and a temperature sensor 16. The air inlet pipe 13 and the air outlet pipe 14 are respectively connected to the air inlet end and the air outlet end of the heat exchange tube 12. The air inlet pipe 13 horizontally penetrates and is fixedly installed above one side of the shell 11. The air outlet end of the conduit 15 is connected to the heat exchange tube 12 and is close to the air inlet pipe 13. The air inlet end of the conduit 15 is connected to the air outlet pipe 14. The temperature sensor 16 is fixedly connected to the inside of the air outlet pipe 14. A semiconductor refrigeration sheet 3 is penetrated and fixedly installed on the top inner wall of the shell 11. The cold end of the semiconductor refrigeration sheet 3 is placed on the inner side of the shell 11. The bottom inner wall of the shell 11 is fixedly connected to an electric heating tube 31. The heat exchange tube 12 is serpentine.

[0024] The outside air can be introduced into the heat exchange tube 12 through the air inlet pipe 13. When the air needs to be pre-cooled, the semiconductor refrigeration plate 3 is controlled by the corresponding controller to work, so as to reduce the temperature in the shell 11 and further pre-cool the air in the heat exchange tube 12. The serpentine shape of the heat exchange tube 12 can improve the heat exchange effect of the air in the heat exchange tube 12. When the air needs to be preheated, the electric heating tube 31 is controlled by the corresponding controller to work, so as to increase the temperature in the shell 11 and preheat the air in the heat exchange tube 12. The pre-cooled and preheated air is introduced into the air-conditioning unit 1 through the air outlet pipe 14. The temperature sensor 16 is arranged inside the air outlet pipe 14 to detect the temperature of the air introduced into the air outlet pipe 14 by the heat exchange tube 12.

[0025] For details, see Figure 1-2 A first solenoid valve 17 is disposed inside the air outlet pipe 14, and a temperature sensor 16 is placed between the air inlet end of the conduit 15 and the first solenoid valve 17, a second solenoid valve 18 is disposed inside the conduit 15, and a one-way valve 23 is disposed inside the heat exchange tube 12, and the one-way valve 23 is placed between the air outlet end of the conduit 15 and the air inlet pipe 13;

[0026] When the air preheating fails to meet the standard, the corresponding controller can control the first solenoid valve 17 to close and open the second solenoid valve 18 at the same time. The air that fails to be preheated can be reintroduced into the heat exchange tube 12 through the air inlet end of the heat exchange tube 12 for reheating. A one-way valve 23 is arranged inside the air inlet end of the heat exchange tube 12 to prevent the air in the duct 15 from being discharged through the air inlet pipe 13.

[0027] For further information, see Figure 1-3 The inside of the air inlet pipe 13 is rotatably connected with an adjustment plate 2, the adjustment plate 2 matches the size of the air inlet pipe 13, a connecting rod 21 is vertically penetrated and fixedly installed in the middle of the adjustment plate 2, a servo motor 22 is fixedly connected to the upper surface of the air inlet pipe 13, and the shaft end of the servo motor 22 is fixedly connected to the top of the connecting rod 21;

[0028] When the temperature sensor 16 detects that the temperature of the preheated air in the heat exchange tube 12 does not meet the standard, the corresponding controller can control the servo motor 22 to work, and can drive the adjustment plate 2 to rotate in the air inlet pipe 13 through the connecting rod 21, thereby controlling the air intake volume in the air inlet pipe 13 and further improving the preheating effect of the air in the heat exchange tube 12.

[0029] It is worth noting that see Figure 1-2 The hot end of the semiconductor cooling sheet 3 is placed on the outside of the housing 11, a protective frame 32 is fixedly connected to the upper surface of the housing 11, and a blower 33 is fixedly connected to the upper end of the inner side of the protective frame 32;

[0030] The protective frame 32 above the shell 11 can protect the hot end of the semiconductor refrigeration plate 3. When the semiconductor refrigeration plate 3 is working, the corresponding controller controls the blower 33 to blow air, which can blow air to dissipate the heat of the hot end of the semiconductor refrigeration plate 3, further improving the cooling effect of the semiconductor refrigeration plate 3.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable frequency constant temperature and humidity air conditioning unit (1) capable of achieving precooling, preheating and reheating, comprising an air conditioning unit (1) and a heat exchange tube (12), wherein one side of the air conditioning unit (1) is fixedly connected to a shell (11), and the heat exchange tube (12) is placed inside the shell (11), and is characterized in that: The heat exchange tube (12) is serpentine-shaped, the air inlet tube (13) and the air outlet tube (14) are respectively connected to the air inlet end and the air outlet end of the heat exchange tube (12), the air inlet tube (13) is horizontally penetrated and fixedly installed above one side of the shell (11), the air outlet end of the duct (15) is connected to the heat exchange tube (12) and is close to the air inlet tube (13), the air inlet end of the duct (15) is connected to the air outlet tube (14), the temperature sensor (16) is fixedly connected to the inside of the air outlet tube (14), and the inside of the air inlet tube (13) is rotatably connected to an adjustment plate (2), and the size of the adjustment plate (2) matches that of the air inlet tube (13).

2. The variable frequency constant temperature and humidity air conditioning unit (1) capable of precooling, preheating and reheating according to claim 1, characterized in that: A first electromagnetic valve (17) is provided inside the air outlet pipe (14), and the temperature sensor (16) is placed between the air inlet end of the conduit (15) and the first electromagnetic valve (17).

3. The variable frequency constant temperature and humidity air conditioning unit (1) capable of precooling, preheating and reheating according to claim 1, characterized in that: A second solenoid valve (18) is disposed inside the conduit (15), a one-way valve (23) is disposed inside the heat exchange tube (12), and the one-way valve (23) is placed between the air outlet end of the conduit (15) and the air inlet pipe (13).

4. The variable frequency constant temperature and humidity air conditioning unit (1) capable of precooling, preheating and reheating according to claim 1, characterized in that: A connecting rod (21) is vertically penetrated and fixedly installed in the middle of the adjustment plate (2), a servo motor (22) is fixedly connected to the upper surface of the air inlet pipe (13), and the shaft end of the servo motor (22) is fixedly connected to the top end of the connecting rod (21).

5. The variable frequency constant temperature and humidity air conditioning unit (1) capable of precooling, preheating and reheating according to claim 1, characterized in that: A semiconductor refrigeration plate (3) is passed through and fixedly mounted on the top inner wall of the shell (11), and an electric heating pipe (31) is fixedly connected to the bottom inner wall of the shell (11).

6. The variable frequency constant temperature and humidity air conditioning unit (1) capable of precooling, preheating and reheating according to claim 5, characterized in that: The cold end of the semiconductor refrigeration sheet (3) is placed on the inner side of the shell (11), and the hot end of the semiconductor refrigeration sheet (3) is placed on the outer side of the shell (11).

7. The variable frequency constant temperature and humidity air conditioning unit (1) capable of precooling, preheating and reheating according to claim 1, characterized in that: A protective frame (32) is fixedly connected to the upper surface of the housing (11), and a hair dryer (33) is fixedly connected to the upper end of the inner side of the protective frame (32).

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