An integrated air handling unit

Abstract

The present invention belongs to the field of smart environment technology, and specifically relates to an integrated air handling unit, including a cooling unit and a dehumidification and temperature control unit; the dehumidification and temperature control unit includes a first shell and tube heat exchanger, a first compressor, a first surface cooler, and a second surface cooler; the cooling unit includes a second compressor, a second shell and tube heat exchanger, and a third shell and tube heat exchanger. The integrated air handling unit of the present invention can meet the needs of cooling and dehumidification and heating and dehumidification, and at the same time realize the transfer of heat generated by refrigeration in the tunnel for recycling and reuse.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent environment, and in particular relates to an integrated air handling unit. Background Art

[0002] Tunnel / cave environments are common scenes for military use, combat readiness, and civil defense. Ordinary tunnels are characterized by high humidity and constant temperature throughout the year. Tunnels / caves that are divided into areas and equipped with equipment and personnel also have the following characteristics: some areas are densely populated with personnel and equipment, and have the characteristics of high temperature and high humidity due to the high heat generated by a large number of equipment and personnel; some areas have fewer personnel and equipment, and the temperature is below the comfort temperature, with the characteristics of high humidity and low temperature all year round. In order to ensure the normal operation of equipment in all areas of the tunnel and to ensure that personnel can be placed in a comfortable space, the tunnel / cave environment has the requirements of both cooling and dehumidification as well as heating and dehumidification.

[0003] In addition, whether it is used for military, combat readiness or civil defense, concealment is one of the factors that must be considered. The traditional cooling method through the outdoor unit, that is, the selection of the air-cooled module, requires heat dissipation in an open space. These outdoor units are difficult to hide outdoors and are exposed to temperature detection equipment, so they are not suitable for tunnel / cave scenes. In addition, due to the reserved size restrictions of the tunnel / cave environment, the size of the refrigeration system and the air handling system must meet the restrictions of the reserved space in the tunnel. Therefore, it is not difficult to see that the air handling system used in the tunnel / cave environment mainly has the following points: 1. It has the needs of cooling and dehumidification and heating and dehumidification at the same time; 2. The heat generated by refrigeration needs to be transferred in the tunnel; 3. The size of the equipment is limited. There are currently no products on the market that meet all three requirements at the same time. Summary of the invention

[0004] In order to solve the above problems, the present invention aims to provide an integrated air handling unit that can meet the needs of cooling and dehumidification and heating and dehumidification, and at the same time can transfer the heat generated by refrigeration in the tunnel and realize recycling and reuse.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: an integrated air handling unit, including a cooling unit and a dehumidification and temperature control unit;

[0006] The dehumidification and temperature control unit includes a first shell and tube heat exchanger, a first compressor, a first surface cooler and a second surface cooler. The first compressor, the first shell and tube heat exchanger and the first surface cooler are connected end to end to form a refrigerant circuit. The water inlet of the first shell and tube heat exchanger is connected to a water reservoir through a water pump, the water outlet of the first shell and tube heat exchanger is connected to the water inlet of the second surface cooler, and the water outlet of the second surface cooler is connected to the water reservoir; the air in the tunnel / cave passes through the return air outlet of the air handling unit, passes through the first surface cooler and the second surface cooler in sequence, and is then sent out from the air supply outlet;

[0007] The cooling unit includes a second compressor, a second shell and tube heat exchanger and a third shell and tube heat exchanger. The second compressor, the second shell and tube heat exchanger and the third shell and tube heat exchanger are connected end to end to form a refrigerant circuit. The water outlet of the second shell and tube heat exchanger is connected to the water inlet of the cooling water pipe between the equipment through a water pump, and the water inlet of the second shell and tube heat exchanger is connected to the water outlet of the cooling water pipe between the equipment; the water inlet of the third shell and tube heat exchanger is connected to the water reservoir through a water pump, and the water outlet of the third shell and tube heat exchanger is connected to the water inlet of the second surface cooler.

[0008] Furthermore, the air handling unit includes a shell, the shell includes a left shell and a right shell, the left shell includes an upper shell and a lower shell, the cooling unit is arranged in the right shell, the first compressor and the first shell and tube heat exchanger are placed in the lower shell, and the first surface cooler and the second surface cooler are placed in the upper shell.

[0009] Furthermore, the return air port and the supply air port are respectively arranged at two ends of the upper shell, the first surface cooler and the second surface cooler are sequentially arranged on the air duct from the return air port to the supply air port, and a blower is arranged on the supply air port.

[0010] Furthermore, a fresh air inlet and an exhaust outlet are also provided on the upper shell body, the exhaust outlet is connected to the return air inlet and the outside, the fresh air inlet is connected to the outside, and an exhaust fan is provided on the exhaust outlet.

[0011] Furthermore, the air handling unit also includes a control unit, which includes a controller, a cooling control unit and a dehumidification and temperature control unit, and the cooling control unit and the dehumidification and temperature control unit are electrically connected to the controller respectively.

[0012] Furthermore, the dehumidification and temperature control control unit includes a first temperature sensor arranged at the return air outlet, a second temperature sensor arranged at the rear end of the first condenser, a third temperature sensor arranged at the air supply outlet, a first solenoid valve arranged at the water inlet of the second condenser, and the first compressor. The first temperature sensor, the second temperature sensor, the third temperature sensor, the first solenoid valve and the first compressor are electrically connected to the controller respectively.

[0013] Furthermore, the cooling control unit includes a fourth temperature sensor and the second compressor arranged at the water inlet end of the second shell and tube heat exchanger, and the fourth temperature sensor and the second compressor are electrically connected to the controller respectively.

[0014] Furthermore, an air filter is provided on the fresh air outlet.

[0015] Furthermore, the air filter is a plate-type primary filter.

[0016] Furthermore, the controller is a PLC controller.

[0017] The integrated air handling unit of the present invention is adapted to local conditions and uses the water in the water storage tank to cool the refrigerant, thereby achieving the goal of no outdoor unit and ensuring the concealment of the tunnel / cave; then the water used in the heat exchange between the dehumidification and temperature control unit and the cooling unit is recycled and reused, and the air after temperature reduction / heating and dehumidification is reheated to provide the tunnel / cave with air of suitable temperature, thereby achieving the goal of transferring the heat generated by refrigeration within the tunnel for reuse, which is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the functional module structure of the present invention;

[0019] Figure 2 is a front view of the shell;

[0020] Figure 3 is a top view of the shell;

[0021] Figure 4 It is a schematic diagram of the module structure of the control unit;

[0022] In the above figure: 1-positioner body; 101-first shell and tube heat exchanger; 102-first compressor; 103-first surface cooler; 104-second surface cooler; 105-return air outlet; 106-air supply outlet; 107-fresh air outlet; 108-exhaust outlet; 109-air supply fan; 110-exhaust fan; 111-first solenoid valve; 2-cooling unit; 201-second compressor; 202-second shell and tube heat exchanger; 203-third shell and tube heat exchanger; 3-shell; 301-right shell; 302-upper shell; 303-lower shell. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] In the existing technology, tunnel / cave environments have the following requirements: 1. The need for both cooling and dehumidification; 2. The heat generated by refrigeration needs to be transferred within the tunnel; 3. The size of the equipment is limited. Currently, there is no product on the market that meets all three requirements at the same time.

[0025] In order to solve the above problems, the present invention provides an integrated air handling unit, such as Figure 1 As shown, it includes a dehumidification and temperature control unit 1 and a cooling unit 2.

[0026] Specifically, Figure 1 As shown, the dehumidification and temperature control unit 1 includes a first shell and tube heat exchanger 101, a first compressor 102, a first surface cooler 103 and a second surface cooler 104. The first compressor 102, the first shell and tube heat exchanger 101 and the first surface cooler 103 are connected end to end to form a refrigerant circuit. The water inlet of the first shell and tube heat exchanger 101 is connected to the water reservoir through a water pump, the water outlet of the first shell and tube heat exchanger 101 is connected to the water inlet of the second surface cooler 104, and the water outlet of the second surface cooler 104 is connected to the water reservoir; the air in the tunnel / cave passes through the return air outlet 105 of the air handling unit, passes through the first surface cooler 103 and the second surface cooler 104 in sequence, and is then sent out from the supply air outlet 106.

[0027] The dehumidification and temperature control unit 1 is mainly used to heat up / down the air in the tunnel / cave for dehumidification and then heat it to a suitable temperature, wherein the first cooler 103 is used to heat up / down the air in the tunnel / cave for dehumidification, and the second cooler 104 is used to reheat the air after heating / cooling and dehumidification. Among the first compressor 102, the first shell and tube heat exchanger 101 and the first cooler 103 that constitute the refrigerant circuit, the first shell and tube heat exchanger 101 is equivalent to the condenser in a conventional air conditioning unit, and the first cooler 103 is equivalent to the evaporator. Different from the conventional air-cooled heat exchange method, the present invention is adapted to local conditions and uses the water in the tunnel / cave water tank to exchange heat with the refrigerant. The water in the water tank is heated after passing through the first shell and tube heat exchanger 101, enters the second cooler 104, and then reheats the air in the tunnel / cave after heating / cooling and dehumidification, and at the same time realizes heat transfer and recycling.

[0028] Specifically, Figure 1 As shown, the cooling unit 2 includes a second compressor 201, a second shell and tube heat exchanger 202 and a third shell and tube heat exchanger 203. The second compressor 201, the second shell and tube heat exchanger 202 and the third shell and tube heat exchanger 203 are connected end to end to form a refrigerant circuit. The water outlet of the second shell and tube heat exchanger 202 is connected to the water inlet of the cooling water pipe between the equipment through a water pump, and the water inlet of the second shell and tube heat exchanger 202 is connected to the water outlet of the cooling water pipe between the equipment; the water inlet of the third shell and tube heat exchanger 203 is connected to the water reservoir through a water pump, and the water outlet of the third shell and tube heat exchanger 203 is connected to the water inlet of the second surface cooler 104.

[0029] The cooling unit 2 is mainly used to cool down the equipment room where a large number of equipment and personnel gather in the tunnel / cave through water cooling, and mainly provides cooling water of 7°C-12°C for the equipment room. Among the second compressor 201, the second shell and tube heat exchanger 202 and the third shell and tube heat exchanger 203 that constitute the refrigerant circuit, the second shell and tube heat exchanger 202 is equivalent to the evaporator in the conventional air-conditioning unit, which is used to provide cooling water of 7°C-12°C to the equipment room, and the third shell and tube heat exchanger 203 is equivalent to the condenser in the conventional air-conditioning unit. Like the first shell and tube heat exchanger 101 in the dehumidification and temperature control unit 1, heat exchange is performed through the water in the water reservoir. The water after heat exchange enters the second surface cooler 104 to heat the dehumidified air, realizing heat reuse.

[0030] The integrated air handling unit of the present invention, first of all, adapts to local conditions and uses the water in the water storage tank to cool the refrigerant, realizes the absence of an outdoor unit, and ensures the concealment of the tunnel / cave; then, the water used in the heat exchange between the dehumidification and temperature control unit 1 and the cooling unit 2 is recycled and reused, and the air after heating / cooling and dehumidification is reheated to provide the tunnel / cave with air of suitable temperature, thereby realizing the transfer and reuse of the heat generated by refrigeration in the tunnel, which is energy-saving and environmentally friendly.

[0031] Due to the limitation of the size of the tunnel / cave, the dehumidification and temperature control unit 1 and the cooling unit 2 are assembled together and arranged in the housing 3, such as Figure 2 As shown, the air handling unit includes a shell 3, which includes a left shell and a right shell 301, and the left shell includes an upper shell 302 and a lower shell 303. A partition is arranged in the shell 3 to divide the inside of the shell 3 into separate spaces, namely the right shell 301 and the upper shell 302 and the lower shell 303 of the left shell. The cooling unit 2 is arranged in the right shell 301, and the dehumidification and temperature control unit 1 is arranged in the left shell. Specifically, the first compressor 102 and the first shell and tube heat exchanger 101 are located in the lower shell 303, and the first cooler 103 and the second cooler 104 are located in the upper shell 302.

[0032] like Figure 2 As shown, the return air port 105 and the air supply port 106 are respectively arranged at the two ends of the upper shell 302, and the Figure 1 As shown, the first cooler 103 and the second cooler 104 are sequentially arranged on the air duct from the return air port 105 to the air supply port 106, and the air supply port 106 is provided with a blower 109. The high-humidity air in the tunnel / cave enters the air handling unit through the return air port 105, and then is heated / cooled and dehumidified by the first cooler 103, and then is heated by the second cooler 104 and then sent to the tunnel / cave through the air supply port.

[0033] Furthermore, if Figure 2As shown, the upper shell 302 is also provided with a fresh air inlet 107 and an exhaust air outlet 108. Figure 1 The exhaust port 108 is connected to the return air port and the outside world, and is used to discharge some of the dirty air in the tunnel / cave. The fresh air port 107 is connected to the outside world, and is used to introduce fresh air from the outside into the tunnel / cave. In order to ensure the cleanliness of the air entering the tunnel / cave, an air filter is provided on the fresh air port 107, and a plate-type primary filter can be selected; the exhaust port 108 is provided with an exhaust fan 110.

[0034] In order to realize automatic control, the air handling unit also includes a control unit, which includes a controller, a cooling control unit and a dehumidification and temperature control unit. Specifically, the controller adopts a PLC controller, wherein the cooling control unit and the dehumidification and temperature control unit are electrically connected to the controller respectively.

[0035] Specifically, the dehumidification and temperature control unit includes a first temperature sensor arranged at the return air outlet 105, which is used to measure the temperature of the return air in the tunnel / cave; a second temperature sensor arranged at the rear end of the first cooler 103, which is used to measure the temperature of the gas after being heated / cooled and dehumidified, wherein the front and back of the first cooler 103 are in terms of the flow direction of the gas, the front of the first cooler 103 is called the front end of the first cooler 103, and the rear end of the first cooler 103 is called the rear end of the first cooler 103 after passing through the first cooler 103; a third temperature sensor arranged at the air supply outlet 106, which is used to measure the temperature of the air heated by the second cooler 104; a first solenoid valve arranged at the water inlet of the second cooler 104, the first solenoid valve 111 is used to adjust the speed of the water flow entering the second cooler 104; and a first compressor 102, at least one first compressor 102 is arranged, such as Figure 1 In the embodiment shown, four first compressors 102 are provided, and correspondingly, four groups of first shell and tube heat exchangers 101 are also provided; the first temperature sensor, the second temperature sensor, the third temperature sensor, the first solenoid valve and the first compressor are electrically connected to the controller respectively. The controller collects the temperature of the air at different positions through the first temperature sensor, the second temperature sensor and the third temperature sensor, and then maintains a suitable temperature in the tunnel / cave by adjusting the speed of the water flow entering the second surface cooler 104 and controlling the number of the first compressors 102 working.

[0036] Specifically, the cooling control unit includes a fourth temperature sensor disposed at the water inlet end of the second shell and tube heat exchanger 202, which is used to measure the temperature of the return water from the cooling water pipe between the equipment, and can evaluate whether the provided cooling water can meet the cooling requirements of the equipment room; and a second compressor 201, at least one second compressor 201 is provided. Figure 1In the embodiment of the present invention, two first compressors 102 are provided; the fourth temperature sensor and the second compressor 201 are electrically connected to the controller respectively. The cooling control unit collects the temperature of the return water of the cooling water pipe in the equipment room and controls the number of the first compressors 102 working to cool down the equipment in the equipment room so as to keep the equipment room at a suitable temperature.

[0037] By setting up automatic adjustment of the PLC controller, the air handling unit's needs for air heating / cooling and dehumidification in tunnels / caves, as well as the cooling needs between equipment are met. The integrated setting also meets the size requirements of the tunnels / caves and the needs of tunnel / cave scenes.

[0038] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. An integrated air handling unit, It is characterized in that Including cooling unit and dehumidification and temperature control unit; The dehumidification and temperature control unit includes a first shell and tube heat exchanger, a first compressor, a first surface cooler and a second surface cooler. The first compressor, the first shell and tube heat exchanger and the first surface cooler are connected end to end to form a refrigerant circuit. The water inlet of the first shell and tube heat exchanger is connected to a water reservoir through a water pump, the water outlet of the first shell and tube heat exchanger is connected to the water inlet of the second surface cooler, and the water outlet of the second surface cooler is connected to the water reservoir; the air in the tunnel / cave passes through the return air outlet of the air handling unit, passes through the first surface cooler and the second surface cooler in sequence, and is then sent out from the air supply outlet; The cooling unit includes a second compressor, a second shell and tube heat exchanger and a third shell and tube heat exchanger. The second compressor, the second shell and tube heat exchanger and the third shell and tube heat exchanger are connected end to end to form a refrigerant circuit. The water outlet of the second shell and tube heat exchanger is connected to the water inlet of the equipment room cooling water pipe through a water pump, and the water inlet of the second shell and tube heat exchanger is connected to the water outlet of the equipment room cooling water pipe; the water inlet of the third shell and tube heat exchanger is connected to the water reservoir through a water pump, and the water outlet of the third shell and tube heat exchanger is connected to the water inlet of the second surface cooler; The air handling unit further comprises a control unit, the control unit comprising a controller, a cooling control unit and a dehumidification and temperature control unit, the cooling control unit and the dehumidification and temperature control unit are electrically connected to the controller respectively; The dehumidification temperature control unit includes a first temperature sensor arranged at the return air outlet, a second temperature sensor arranged at the rear end of the first surface cooler, a third temperature sensor arranged at the air supply outlet, a first solenoid valve arranged at the water inlet of the second surface cooler and the first compressor, and the first temperature sensor, the second temperature sensor, the third temperature sensor, the first solenoid valve and the first compressor are electrically connected to the controller respectively; The cooling control unit includes a fourth temperature sensor and the second compressor arranged at the water inlet end of the second shell and tube heat exchanger, and the fourth temperature sensor and the second compressor are electrically connected to the controller respectively.

2. The integrated air handling unit according to claim 1, It is characterized in that The air handling unit includes a shell, which includes a left shell and a right shell, the left shell includes an upper shell and a lower shell, the cooling unit is arranged in the right shell, the first compressor and the first shell and tube heat exchanger are placed in the lower shell, and the first surface cooler and the second surface cooler are placed in the upper shell.

3. The integrated air handling unit according to claim 2, It is characterized in that The return air port and the supply air port are respectively arranged at two ends of the upper shell, the first surface cooler and the second surface cooler are sequentially arranged on the air duct from the return air port to the supply air port, and the supply air port is provided with a blower.

4. The integrated air handling unit according to claim 3, It is characterized in that The upper shell body is also provided with a fresh air inlet and an exhaust air outlet. The exhaust air outlet is connected to the return air inlet and the outside world. The fresh air inlet is connected to the outside world. An exhaust fan is provided on the exhaust air outlet.

5. The integrated air handling unit according to claim 4, It is characterized in that An air filter is arranged on the fresh air outlet.

6. The integrated air handling unit according to claim 5, It is characterized in that The air filter is a plate-type primary filter.

7. The integrated air handling unit according to claim 6, It is characterized in that The controller is a PLC controller.

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