Energy-saving laboratory ventilation and air conditioning system

Abstract

The utility model discloses an energy -saving laboratory ventilation air conditioning system, including containing energy recovery condenser and energy recovery evaporimeter's working medium circulating unit, energy recovery condenser is connected between indoor and outdoor and is used for the air of outdoor with the working medium in working medium circulating unit heat exchange after being introduced into indoor, and energy recovery evaporimeter is connected between indoor and outdoor and is used for the air of indoor with the working medium in working medium circulating unit heat exchange after being exported to outdoor, compared with prior art, through energy recovery condenser and energy recovery evaporimeter to recycle and utilize the cold quantity or heat in the exhaust air exported from indoor to outdoor and act on the fresh air drawn into indoor, reduce energy consumption, to reduce the use expense.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to an energy-saving laboratory ventilation and air conditioning system. Background Technology

[0002] In laboratory ventilation systems, due to the large air exchange volume and continuous operation required by the experimental environment, independent fresh air conditioners and exhaust fans are usually used to handle indoor air ventilation. This method requires directly exhausting the indoor air, which has been treated for temperature and humidity, to the outside, while simultaneously treating the outdoor fresh air to the required state before sending it into the room. This process results in extremely high energy consumption due to the large and continuous air exchange volume, and is extremely inefficient, leading to very high operating costs in the long run. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an energy-saving laboratory ventilation and air conditioning system to solve the problem of high energy consumption and high operating costs caused by the existing combination of fresh air conditioners and exhaust fans for laboratory ventilation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an energy-saving laboratory ventilation and air conditioning system, comprising a working fluid circulation unit containing an energy recovery condenser and an energy recovery evaporator. The energy recovery condenser is connected between the indoor and outdoor environments and is used to exchange heat between outdoor air and the working fluid in the working fluid circulation unit before introducing it into the indoor environment. The energy recovery evaporator is connected between the indoor and outdoor environments and is used to exchange heat between indoor air and the working fluid in the working fluid circulation unit before exporting it to the outdoor environment.

[0005] Compared with the prior art, the present invention has the following beneficial effects:

[0006] This energy-saving laboratory ventilation and air conditioning system operates as follows: In cooling mode, the energy recovery condenser functions as a condenser, recovering the cold energy from the exhaust air drawn from indoors to outdoors and applying it to the working fluid in the working fluid circulation unit. The evaporator functions as an evaporator, using the working fluid in the working fluid circulation unit to cool the fresh air introduced from outdoors to indoors. In heating mode, the energy recovery condenser functions as an evaporator, recovering the heat from the exhaust air drawn from indoors to outdoors and applying it to the working fluid in the working fluid circulation unit. The evaporator functions as a condenser, using the working fluid in the working fluid circulation unit to heat the fresh air introduced from outdoors to indoors. This allows for the recovery and utilization of the cold or heat energy from the exhaust air drawn from indoors to outdoors, reducing energy consumption and lowering operating costs. Attached Figure Description

[0007] Figure 1 This is a process flow diagram of an embodiment of the present invention under refrigeration conditions;

[0008] Figure 2 This is a process flow diagram of an embodiment of the present invention under heating conditions.

[0009] The reference numerals in the accompanying drawings include: compressor 1, four-way valve 2, energy recovery condenser 3, condenser fins 31, exhaust fan 32, throttle valve 4, energy recovery evaporator 5, evaporator fins 51, fresh air unit 52, fresh air duct 6, exhaust duct 7, electric regulating valve 8, room 9, indoor temperature detector 10, and outdoor temperature detector 11. Detailed Implementation

[0010] The present invention will be further described in detail below through specific embodiments:

[0011] like Figure 1 and Figure 2 As shown in the figure, this utility model embodiment proposes an energy-saving laboratory ventilation and air conditioning system, including a working fluid circulation unit containing an energy recovery condenser 3 and an energy recovery evaporator 5. The energy recovery condenser 3 is connected between the indoor and outdoor environments and is used to exchange heat between the outdoor air and the working fluid in the working fluid circulation unit before introducing it into the indoor environment. The energy recovery evaporator 5 is connected between the indoor and outdoor environments and is used to exchange heat between the indoor air and the working fluid in the working fluid circulation unit before exporting it to the outdoor environment.

[0012] This energy-saving laboratory ventilation and air conditioning system operates under the following conditions: (e.g., cooling mode) Figure 1 The energy recovery condenser 3 is used as a condenser to recover the cooling energy in the exhaust air from indoors to outdoors and apply it to the working fluid in the working fluid circulation unit. The energy recovery evaporator 5 is used as an evaporator to cool the fresh air introduced from outdoors to indoors using the working fluid in the working fluid circulation unit. In heating mode (e.g.) Figure 2 The energy recovery condenser 3 is used as an evaporator to recover the heat from the exhaust air exported from indoors to outdoors and apply it to the working fluid in the working fluid circulation unit. The energy recovery evaporator 5 is used as a condenser to heat the fresh air introduced from outdoors to indoors using the working fluid in the working fluid circulation unit. This allows for the recovery and utilization of the cold or heat in the exhaust air exported from indoors to outdoors, reducing energy consumption and lowering operating costs.

[0013] In this embodiment, the working fluid circulation unit further includes a four-way valve 2, a compressor 1, and a throttle valve 4. The exhaust port of the compressor 1 is connected to the inlet of the energy recovery condenser 3 through the first interface of the four-way valve 2. The outlet of the energy recovery condenser 3 is connected to the inlet of the throttle valve 4. The outlet of the throttle valve 4 is connected to the inlet of the energy recovery evaporator 5. The outlet of the energy recovery evaporator 5 is connected to the suction port of the compressor 1 through the second interface of the four-way valve 2. The third and fourth interfaces of the four-way valve 2 are used to switch the functions of the energy recovery condenser 3 and the energy recovery evaporator 5 in cooling mode and heating mode, respectively.

[0014] In cooling conditions (summer) (such as) Figure 1 ):

[0015] The four-way valve 2 switches the flow direction of the working fluid (refrigerant) as follows:

[0016] The working fluid flows sequentially from compressor 1, four-way valve 2, energy recovery condenser 3 (condensation releases heat, heats exhaust air), throttling valve 4, energy recovery evaporator 5 (evaporation absorbs heat, cools fresh air), four-way valve 2, and compressor 1.

[0017] At this time, the energy recovery condenser 3 is used as a condenser. The condenser fins 31 in the energy recovery condenser 3 recover the cooling energy in the exhaust air that is discharged from the room to the outside by the exhaust fan 32 in the energy recovery condenser 3. This cooling energy acts on the circulating working fluid to cool the working fluid. The energy recovery evaporator 5 is used as an evaporator. The cooled working fluid acts on the evaporator fins 51 in the energy recovery evaporator 5 to cool the evaporator fins 51. The evaporator fins 51 then cool the fresh air introduced from the outside to the room by the fresh air fan 52 in the energy recovery evaporator 5.

[0018] In heating mode (winter) (such as) Figure 2 ):

[0019] The four-way valve 2 switches the flow direction of the working fluid (refrigerant) as follows:

[0020] The working fluid flows sequentially from compressor 1, four-way valve 2, energy recovery evaporator 5 (condensation releases heat and heats fresh air), expansion valve 4, energy recovery condenser 3 (evaporation absorbs heat and cools exhaust air), four-way valve 2, and compressor 1.

[0021] At this time, the energy recovery condenser 3 is used as an evaporator. The condenser fins 31 in the energy recovery condenser 3 recover the heat from the exhaust air that is discharged from the room to the outside by the exhaust fan 32 in the energy recovery condenser 3. This heat acts on the circulating working fluid to heat the working fluid. The energy recovery evaporator 5 is used as a condenser. The heated working fluid acts on the evaporator fins 51 in the energy recovery evaporator 5 to heat the evaporator fins 51. The evaporator fins 51 then heat the fresh air introduced from the outside to the room by the fresh air fan 52 in the energy recovery evaporator 5.

[0022] like Figure 1 and Figure 2 As shown, according to another embodiment of the present invention, the energy-saving laboratory ventilation and air conditioning system wherein the energy recovery condenser 3 is connected to the indoor unit via an exhaust duct 7, the energy recovery evaporator 5 is connected to the indoor unit via a fresh air duct 6, the fresh air duct 6 is provided with a fresh air branch pipe connected to the outdoor unit, and a regulating valve is provided on the fresh air duct.

[0023] In use: the fresh air fan 52 in the energy recovery evaporator 5 provides power to draw fresh outdoor air into the energy recovery evaporator 5 for heat exchange, and then introduces it into the room through the fresh air duct 6. The indoor air is drawn into the exhaust duct 7 by the exhaust fan 32 in the energy recovery condenser 3, then enters the energy recovery condenser 3 for heat exchange, and then is discharged to the outside.

[0024] When the outdoor temperature is suitable (e.g., 25℃), the opening of the regulating valve can be increased, and the fresh air branch pipe can directly introduce suitable outdoor air into the room, reducing the airflow through the energy recovery evaporator 5 to reduce the energy consumption of the fresh air unit 52. When the outdoor temperature is extreme (e.g., 43℃), the opening of the regulating valve can be reduced or closed, allowing more outdoor air to flow through the energy recovery evaporator 5 for energy recovery, so as to achieve the goal of relatively lower energy consumption of this energy-saving laboratory ventilation and air conditioning system.

[0025] Based on the above solution:

[0026] The energy-saving laboratory ventilation and air conditioning system also includes a control unit, an indoor temperature detector 10 installed indoors, and an outdoor temperature detector 11 installed outdoors. Both the indoor temperature detector 10 and the outdoor temperature detector 11 are connected to the control unit, and the control unit is also connected to a regulating valve.

[0027] In this embodiment, the signals of the indoor temperature detected by the indoor temperature detector 10 and the outdoor temperature detected by the outdoor temperature detector 11 are fed back to the control unit. The control unit calculates the difference between the indoor temperature and the outdoor temperature. The larger the difference, the smaller the opening of the control valve. At this time, more outdoor air flows through the energy recovery evaporator 5 to recover energy, so as to achieve the purpose of relatively lower energy consumption of this energy-saving laboratory ventilation and air conditioning system.

[0028] The indoor temperature detector 10 and the outdoor temperature detector 11 are both temperature sensors, the control unit is an existing controller that can achieve the above functions, and the regulating valve is an electric regulating valve 8.

[0029] This energy-saving laboratory ventilation and air conditioning system utilizes the energy recovery condenser 3 or energy recovery evaporator 5 to recover and reuse the cold or heat contained in the indoor exhaust air that was originally directly discharged to the outside, and uses it to cool or heat the fresh air, thus significantly reducing the energy consumption of fresh air treatment.

[0030] It should be noted that: the indoor space refers to the space inside room 9, and the outdoor space refers to the space outside room 9.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An energy saving laboratory ventilation and air conditioning system, characterized by, It includes a working fluid circulation unit containing an energy recovery condenser and an energy recovery evaporator. The energy recovery condenser is connected between the indoor and outdoor environments and is used to exchange heat between outdoor air and the working fluid in the working fluid circulation unit before introducing it into the indoor environment. The energy recovery evaporator is connected between the indoor and outdoor environments and is used to exchange heat between indoor air and the working fluid in the working fluid circulation unit before exporting it to the outdoor environment.

2. The energy-saving laboratory ventilation and air conditioning system according to claim 1, characterized in that, The working fluid circulation unit also includes a four-way valve, a compressor, and a throttle valve. The compressor's exhaust port is connected to the inlet of the energy recovery condenser through the first interface of the four-way valve. The outlet of the energy recovery condenser is connected to the inlet of the throttle valve, and the outlet of the throttle valve is connected to the inlet of the energy recovery evaporator. The outlet of the energy recovery evaporator is connected to the compressor's suction port through the second interface of the four-way valve. The third and fourth interfaces of the four-way valve are used to switch the functions of the energy recovery condenser and the energy recovery evaporator in cooling mode and heating mode, respectively.

3. The energy-saving laboratory ventilation and air conditioning system according to claim 1 or 2, characterized in that, The energy recovery evaporator is connected to the indoor unit via a fresh air duct. The fresh air duct is equipped with a branch pipe that connects to the outdoor unit, and a regulating valve is installed on the fresh air duct.

4. The energy-saving laboratory ventilation and air conditioning system according to claim 3, characterized in that, It also includes a control unit, an indoor temperature sensor installed indoors, and an outdoor temperature sensor installed outdoors. Both the indoor and outdoor temperature sensors are connected to the control unit, which is also connected to a regulating valve.

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