Air conditioning cabinet with heat pipes

Abstract

The utility model relates to the field of indoor temperature adjusting systems, in particular to an air conditioning system, and particularly relates to an air conditioning box with heat pipes. Which comprises an air pipe in which a pre-cooling section, a heating section and air supply equipment are respectively arranged, and is characterized by further comprising a heat pipe, two sections of the heat pipe are respectively connected with the pre-cooling section and the heating section, so that the pre-cooling section is used as an evaporation section of the heat pipe, and the heating section is used as a condensation section of the heat pipe. According to the working principle of the heat pipe, the coil pipe of the pre-cooling section of the air-conditioning box serves as the evaporation section of the heat pipe, the coil pipe of the reheating section of the air-conditioning box serves as the condensation section of the heat pipe, and therefore the repeated process that the air-conditioning box is cooled firstly and then heated in summer is reduced. Therefore, the utilization efficiency of the cold and heat sources by the air conditioning box is improved, resource waste caused by first cooling and then heating is reduced, and finally the COP of the air conditioning box is improved.

Description

Technical Field

[0001] The utility model relates to the field of indoor temperature regulation systems, especially air conditioning systems, and specifically to an air handling unit with heat pipes. Background Art

[0002] An air handling unit is an important component of an air conditioning system, mainly used to regulate the temperature, humidity, cleanliness, and air flow rate of indoor air.

[0003] In some cases, during the refrigeration and heating processes of the air handling unit, it is necessary to first lower the room temperature and then raise it. For example: 1. For energy conservation and efficiency considerations; 2. For dehumidification requirements; 3. For temperature control strategies. However, during the heating process, the air handling unit needs to generate heat. During the heating process, gaseous freon is pressurized by a compressor to become a high-temperature and high-pressure gas, and then enters the heat exchanger (condenser) of the indoor unit to release heat.

[0004] For the current air handling unit, during the heating process, the compressor needs to consume additional electrical energy to operate, and not all of the heat released by the freon in the condenser can be absorbed by the indoor air, and part of the heat will be dissipated into the environment; thus, there is a certain amount of energy loss. Summary of the Invention

[0005] The purpose of the utility model is to overcome the above defects, and propose an air handling unit with heat pipes, so as to improve the utilization efficiency of the cold and heat sources of the air handling unit, reduce resource waste, and improve the COP (Coefficient of Performance) of the air handling unit.

[0006] To achieve the above purpose, the utility model is realized as follows:

[0007] An air handling unit with heat pipes includes an air duct, in which a pre-cooling section, a heating section, and a air supply device are respectively arranged, and also includes heat pipes. Two sections of the heat pipes are respectively connected to the pre-cooling section and the heating section. In this way, the pre-cooling section serves as the evaporation section of the heat pipe, and the heating section serves as the condensation section of the heat pipe.

[0008] The above air handling unit with heat pipes further includes a primary filter section, a medium filter section, a re-cooling section, and a high-efficiency filter section that are arranged at intervals between the pre-cooling section, the heating section, and the air supply device.

[0009] The above air handling unit with heat pipes proposed by the utility model replaces the pre-cooling section and the heating section of the air handling unit with heat pipes while keeping the original structure of the air handling unit unchanged.

[0010] Its specific working principle is as follows: Fresh air section - primary filter - pre-cooling section (heat pipe evaporation section): The outdoor hot air flows through the pre-cooling section, causing the liquid in the negative pressure environment of the heat pipe to absorb heat and evaporate, flowing to the other end of the heat pipe, and the air releases heat during this process - intermediate filter - re-cooling section (directly provided with cooling capacity by the chilled water host) - heating section (heat pipe condensation section): The super-cooled air that has been dehumidified at the cold end flows through the heating section, causing the liquid evaporated from the pre-cooling section to condense from a gaseous state to a liquid state and flow back to the evaporation section of the heat pipe under the action of capillary action or gravity, and the air absorbs heat during this process.

[0011] For the above-mentioned air handling unit with heat pipes, to meet the temperature requirements of winter air conditioning, the heat pipe air handling unit needs to add a re-heating section, which directly provides heat by the unit. The re-heating section is arranged behind the heating section, and the air flow entering the air duct flows through the heating section and the re-heating section in sequence.

[0012] Furthermore, for the above-mentioned air handling unit with heat pipes, the heat pipes are separately arranged outside the air duct. The two ends of the heat pipes enter the air duct and are connected to the pre-cooling section and the heating section, and an adiabatic section is arranged between the evaporation section and the condensation section of the heat pipes.

[0013] Furthermore, for the above-mentioned air handling unit with heat pipes, the air supply device refers to a fan.

[0014] Furthermore, for the above-mentioned air handling unit with heat pipes, the air duct includes an outdoor fresh air inlet and an indoor return air inlet, and the air duct also includes an air outlet leading to the indoor area.

[0015] Furthermore, for the above-mentioned air handling unit with heat pipes, the air handling unit with heat pipes is characterized in that: Pre-cooling section: realized by the evaporation section of the heat pipe; Heating section: realized by the condensation section of the heat pipe; The primary, intermediate, and high-efficiency filtration sections can all be completed by bag dust removal and electrostatic dust removal; Re-cooling section: realized by cooling with low-temperature water in the air conditioning cooling coil.

[0016] The utility model utilizes the working principle of the heat pipe, taking the coil in the pre-cooling section of the air handling unit as the evaporation section of the heat pipe and the coil in the re-heating section of the air handling unit as the condensation section of the heat pipe, thereby reducing the repeated process of first cooling and then heating in summer for the air handling unit. In this way, the utilization efficiency of the cold and heat sources of the air handling unit is improved, the waste of resources for first cooling and then heating is reduced, and finally the COP of the air handling unit is increased. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the air handling unit with heat pipes shown in the present invention. Detailed Description of the Preferred Embodiment

[0018] The following further illustrates the present invention through specific embodiments.

[0019] As Figure 1, An air handling unit with heat pipes, comprising an air duct. An initial filter section, a pre-cooling section, a medium-efficiency filter section, a re-cooling section, a heating section, a re-heating section, a high-efficiency filter section and a fan are sequentially arranged at the air inlet of the air duct. It also includes heat pipes which are separately arranged outside the air duct. Both ends of the heat pipes enter the air duct and are connected to the pre-cooling section and the heating section. Heat insulation materials are wrapped on the surfaces of the heat pipes.

[0020] The working principles of each part of the above air handling unit are as follows:

[0021] 1. Fresh air from the outside and the return air from the room are mixed at the air inlet of the air duct and flow to the subsequent parts.

[0022] 2. Initial filter: Initially filter dust and impurities.

[0023] 3. Pre-cooling section: Pre-cool the air to cool down the outside air.

[0024] 4. Medium-efficiency filter: Filter dust and impurities again.

[0025] 5. Re-cooling section: Cool the air again to make the water vapor in the air condense, thereby reducing the enthalpy moisture content of the air.

[0026] 6. Heating section: Due to dehumidification in summer, in order to achieve the appropriate humidity, the temperature of the air is lower than the required temperature. Ensure that the supply air temperature heats the air. At the same time, in winter, it also heats the cold outside air.

[0027] 7. High-efficiency filter: Filter dust and impurities in the air again to achieve a certain cleanliness level.

[0028] 8. Fan section: Provide power for the air handling unit and send the air to the room.

[0029] The specific working principle of the above air handling unit is: Fresh air section - Initial filter - Pre-cooling section (heat pipe evaporation section): The outdoor hot air flows through the pre-cooling section to make the liquid in the heat pipe under negative pressure absorb heat and evaporate and flow to the other end of the heat pipe. The air releases heat in this process - Medium-efficiency filter - Re-cooling section (directly provided with cold by the chilled water host) - Heating section (heat pipe condensation section): The cold air that has been dehumidified at the cold end flows through the heating section to make the liquid evaporated from the pre-cooling section condense from gas to liquid and flow back to the evaporation section of the heat pipe under the action of capillary action or gravity. The air absorbs heat in this process.

[0030] In the above air handling unit, the mentioned heat pipes include a pipe shell, a wick and end caps. After evacuating the inside of the pipe to a negative pressure of 1.3×(10 - 1 to 10 - 4) Pa, an appropriate amount of working liquid is filled, and the capillary porous material of the wick that adheres to the inner wall of the pipe is filled with liquid and then sealed.

[0031] The principle of the above heat pipe is as follows: one end is the evaporation section (heating section), and the other end is the condensation section (cooling section). An adiabatic section can be arranged between the two sections according to application requirements. When one end of the heat pipe is heated, the liquid in the capillary core evaporates and vaporizes. The vapor flows to the other end under a small pressure difference and releases heat to condense into a liquid. The liquid then flows back to the evaporation section along the porous material by the action of capillary force. This cycle continues continuously, and heat is transferred from one end of the heat pipe to the other end.

[0032] In the process of the heat pipe achieving the above heat transfer, the following six interrelated main processes are included:

[0033] 1. Heat is transferred from the heat source through the heat pipe wall and the wick filled with the working liquid to the (liquid-vapor) interface.

[0034] 2. The liquid evaporates at the (liquid-vapor) interface in the evaporation section.

[0035] 3. The vapor in the vapor chamber flows from the evaporation section to the condensation section.

[0036] 4. The vapor condenses at the vapor-liquid interface in the condensation section.

[0037] 5. Heat is transferred from the (vapor-liquid) interface through the wick, liquid, and pipe wall to the cold source.

[0038] 6. Due to capillary action in the wick, the condensed working liquid flows back to the evaporation section.

[0039] It can be seen from the above embodiments that the utility model utilizes the working principle of the heat pipe, taking the coil in the pre-cooling section of the air handling unit as the evaporation section of the heat pipe and the coil in the reheating section of the air handling unit as the condensation section of the heat pipe, thereby reducing the repeated process of first cooling and then heating the air handling unit in summer.

Claims

1. An air handling unit with heat pipes, comprising an air duct, in which a pre-cooling section, a heating section and a air supply device are respectively arranged, and characterized in that: It further includes a heat pipe, with two ends of the heat pipe respectively connected to the pre-cooling section and the heating section. In this way, the pre-cooling section serves as the evaporation section of the heat pipe, and the heating section serves as the condensation section of the heat pipe.

2. The air conditioner box with a heat pipe according to claim 1, characterized in that: It further includes a reheating section, which is arranged behind the heating section, and the air flow entering the air duct flows through the heating section and the reheating section in sequence.

3. The air conditioning box with a heat pipe according to claim 1 or 2, characterized in that: It further includes a primary filter section, a medium filter section, a re-cooling section and a high-efficiency filter section which are arranged at intervals between the pre-cooling section, the heating section and the air supply device.

4. The air handling unit with heat pipes according to claim 1, characterized in that: The heat pipe is separately arranged outside the air duct, and both ends of the heat pipe enter the air duct and are connected to the pre-cooling section and the heating section. An adiabatic section is arranged between the evaporation section and the condensation section of the heat pipe.

5. The air handling unit with heat pipes according to claim 1, characterized in that: The air supply device refers to a fan.

6. The air conditioning box with a heat pipe according to claim 1, characterized in that: The air duct includes an outdoor fresh air input port and an indoor return air input port, and the air duct further includes an air outlet leading to the interior of the room.

7. The air handling unit with a heat pipe according to claim 1 or 2, characterized in that: Pre-cooling section: realized by the evaporation section of the heat pipe; heating section: realized by the condensation section of the heat pipe; primary, medium and high filter sections can all be completed by bag dust removal and electrostatic dust removal; re-cooling section: realized by cooling with low-temperature water of the air-conditioning cold coil.

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