Differential pressure interlocking energy-saving device suitable for indoor air conditioner

Abstract

The utility model provides a differential pressure interlocking energy-saving device suitable for an indoor air conditioner, which comprises an air handling unit, a fresh air section arranged at the front end of the air handling unit, an air return section arranged above the air handling unit and an air supply section arranged at the rear end of the air handling unit, working equipment communicated with the exhaust pipe is arranged indoors, the working equipment is communicated with an energy-saving unit, the energy-saving unit comprises an electric closed valve and a variable air volume electric valve which are arranged on the exhaust pipe, the electric closed valve is electrically connected with the working equipment, and the variable air volume electric valve is electrically connected with a pressure difference interlocking device arranged indoors. According to the air conditioning system, frequent changes of the air supply and return volume and the cold and heat source consumption of the air conditioning system caused by opening and closing of the working equipment can be avoided, and the energy-saving effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a differential pressure interlock energy-saving device suitable for indoor air conditioner, and is applied to the field of energy-saving air conditioner. BACKGROUND

[0002] The air conditioning secondary return air system is an air treatment system, which mixes part of indoor return air with outdoor fresh air, and then sends the mixed air into the indoor again after treatment, so as to achieve the purpose of energy saving and maintaining indoor air quality. This system is widely used in large buildings such as office buildings, shopping malls, hospitals and hotels.

[0003] The existing indoor working equipment is prone to cause unstable pressure difference in the indoor when starting, and when the pressure difference in the indoor is unstable, the air supply amount of the air supply section will change frequently and the cold and heat source consumption amount will change frequently, which will cause the air handling unit to work frequently and cause energy waste. In order to solve the above problems, the utility model designs a differential pressure interlock energy-saving device suitable for indoor air conditioner. UTILITY MODEL CONTENTS

[0004] The utility model provides a differential pressure interlock energy-saving device suitable for indoor air conditioner, which can effectively solve the above problems.

[0005] The utility model is implemented as follows:

[0006] A differential pressure interlock energy-saving device suitable for indoor air conditioner, comprising an air handling unit, a fresh air section arranged at the front end of the air handling unit, a return air section arranged above the air handling unit, and an air supply section arranged at the rear end of the air handling unit, wherein the return air section comprises an exhaust pipe connected to the indoor, and the indoor comprises working equipment connected to the exhaust pipe,

[0007] The working equipment is connected to an energy-saving unit, the energy-saving unit comprises an electric sealing valve arranged on the exhaust pipe and a variable air volume electric valve, the electric sealing valve is electrically connected to the working equipment, the variable air volume electric valve is electrically connected to a differential pressure interlock device arranged in the indoor, the electric sealing valve is used to control the start / stop of the working equipment, the variable air volume electric valve is used to adjust the air volume of the exhaust pipe, and the differential pressure interlock device is used to monitor the pressure difference between the indoor and the atmosphere.

[0008] As a further improvement, the differential pressure interlock device comprises a controller and a differential pressure sensor arranged in the indoor, and the controller is electrically connected to the differential pressure sensor.

[0009] As a further improvement, the air handling unit comprises a first filter, a second filter, a first cooler, a second cooler, a fan, a heater, a humidifier and a third filter arranged in sequence, and the air handling unit is used to treat the mixed air.

[0010] As a further improvement, the exhaust duct is communicated with a first return air passage and a second return air passage, the first return air passage and the second return air passage are communicated with the air handling unit, the first return air passage is arranged between the first filter and the second filter, the second return air passage is arranged between the first cooler and the second cooler, and the first return air passage and the second return air passage are used for providing indoor return air.

[0011] As a further improvement, the ratio D1 between the return air volume of the return air section and the supply air volume of the supply air section is 30-40% during the first return air, and the ratio D2 between the return air volume of the return air section and the supply air volume of the supply air section is 60-70% during the second return air.

[0012] As a further improvement, the return air volume ratio D3 between the first return air passage and the exhaust duct is 10-15%.

[0013] The beneficial effects of the present application are as follows: the pressure difference interlocking device of the variable air volume electric valve on the exhaust duct and the indoor can realize accurate control of the pressure difference between the indoor and the atmosphere, through real-time monitoring and feedback control, the system can automatically adjust the exhaust volume, maintain the set pressure difference value, and the variable air volume electric valve and the electric closed valve on the exhaust duct can keep the room supply air volume unchanged when the equipment is opened and closed, thereby avoiding frequent changes of the air conditioning system supply and return air volume and the cold and heat source consumption caused by the opening and closing of the working equipment, causing the instability of the air conditioning system, and the air handling unit needs to work frequently at this time, causing energy waste, and the energy-saving effect can be effectively achieved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 is a structural schematic diagram provided by the embodiments of the present application.

[0016] Figure 2 is an energy-saving unit flow schematic diagram provided by the embodiments of the present application.

[0017] The following is the identification of the drawings:

[0018] 10, air handling unit; 11, first filter; 111, condensate drain; 12, second filter; 13, first cooler; 131, first temperature sensor; 14, second cooler; 141, second temperature sensor; 15, fan; 151, automatic frequency converter; 16, heater; 161, third temperature sensor; 162, steam condensate collection; 163, trap; 17, humidifier; 18, third filter;

[0019] 20, fresh air section;

[0020] 30, return air section; 31, exhaust duct; 32, first return air passage; 33, second return air passage;

[0021] 40, supply air section;

[0022] 50, working equipment;

[0023] 60, energy saving unit; 61, electric shut-off valve; 62, variable air volume electric valve; 63, differential pressure interlock; 631, controller; 632, differential pressure sensor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only to represent selected embodiments of the present application.

[0025] In the description of the present application, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] Referring to Figure 1 As shown in the figure, a clean air conditioning secondary return air energy saving system comprises:

[0027] The air handling unit 10 comprises a first filter 11, a second filter 12, a first cooler 13, a second cooler 14, a fan 15, a heater 16, a humidifier 17, and a third filter 18 arranged in sequence, and is used for treating mixed air;

[0028] An outdoor air section 20 is arranged at the front end of the air handling unit 10, and is used for providing outdoor fresh air;

[0029] A return air section 30 is arranged above the air handling unit 10, and comprises an exhaust duct 31, a first return air passage 32 and a second return air passage 33 which are in communication with the exhaust duct 31, the first return air passage 32 and the second return air passage 33 are in communication with the air handling unit 10, the first return air passage 32 is arranged between the first filter 11 and the second filter 12, the second return air passage 33 is arranged between the first cooler 13 and the second cooler 14, and the first return air passage 32 and the second return air passage 33 are used for providing indoor return air;

[0030] A supply air section 40 is arranged at the rear end of the air handling unit 10, and is used for supplying the treated mixed air into an indoor space, the indoor space comprises a working device 50 which is in communication with the exhaust duct 31, the working device 50 is in communication with an energy saving unit 60, and the energy saving unit 60 is in communication with the air handling unit 10, and the working device 50 is used for providing a working environment for a user; Figure 2As shown, the energy saving unit 60 includes an electrically controlled valve 61 and a variable air volume electric valve 62 arranged on the exhaust air pipe 31, the electrically controlled valve 61 is electrically connected with the working equipment 50, the variable air volume electric valve 62 is electrically connected with a pressure difference interlock device arranged in the room, the electrically controlled valve 61 is used to control the start / stop of the working equipment 50, the valve of the electrically controlled valve 61 is opened when the equipment is started, and the valve of the electrically controlled valve 61 is closed when the equipment is stopped, the variable air volume electric valve 62 is used to adjust the air volume of the exhaust air pipe 31, the pressure difference interlock device is used to monitor the pressure difference between the room and the atmosphere, the pressure difference interlock device 63 includes a controller 631 and a pressure difference sensor 632 arranged in the room, the controller 631 is electrically connected with the pressure difference sensor 632, the pressure difference sensor 632 is used to monitor the pressure difference between the room and the atmosphere, the controller 631 is used to receive the signal of the pressure difference sensor and control the opening and closing degree of the variable air volume electric valve 62 to achieve the effect of adjusting the air volume, by using the variable air volume electric valve 62 on the exhaust air pipe 31 and the pressure difference interlock device 63 in the room, the pressure difference between the room and the atmosphere can be accurately controlled, through real-time monitoring and feedback control, the system can automatically adjust the exhaust air volume to maintain the set pressure difference value, by using the variable air volume electric valve 62 and the electrically controlled valve 61 on the exhaust air pipe 31, the room air supply volume does not change when the equipment is started and stopped, thereby avoiding the frequent change of the air supply and return air volume of the air conditioning system and the frequent change of the cold and heat source consumption caused by the start and stop of the working equipment, which causes the waste of energy and achieves the effect of energy saving.

[0031] The ratio D1 between the return air volume of the return air section 30 and the supply air volume of the supply air section 40 is 30-40% when the return air is returned for the first time, and the ratio D2 between the return air volume of the return air section 30 and the supply air volume of the supply air section 40 is 60-70% when the return air is returned for the second time, in this embodiment, the ratio D1 between the return air volume of the return air section 30 and the supply air volume of the supply air section 40 is 30% when the return air is returned for the first time, and the ratio D2 between the return air volume of the return air section 30 and the supply air volume of the supply air section 40 is 65% when the return air is returned for the second time, the setting of the supply air ratio can effectively reduce the energy consumption by 15%.

[0032] The ratio D3 between the return air volume of the first return air passage 32 and the exhaust air pipe 31 is 10-15%, in this embodiment, the ratio D3 between the return air volume of the first return air passage 32 and the exhaust air pipe 31 is 15%, that is, 15% of the return air volume flows into the air handling unit 10 from the first return air passage 32, and 85% of the return air volume flows into the air handling unit 10 from the second return air passage 32, the advantage of this setting is that a large amount of return air is arranged between the first cooler 13 and the second cooler 14, the processing time of the first cooler 13 is reduced, and thus the energy consumption is reduced.

[0033] The first cooler 13 is connected with a plurality of first temperature sensors 131, and the second cooler 14 is connected with a plurality of second temperature sensors 141; in the embodiment, the number of the first temperature sensors 131 and the second temperature sensors 141 is two; since a part of the return air enters the first return air passage 32 and another part of the return air enters the second return air passage 33, so that the return air temperature in the two passages is different, therefore, the temperature sensors 131 are additionally arranged to more accurately control the air conditioning temperature; the heater 16 is provided with a third temperature sensor 161; since the air after the return air is mixed with the fresh air and then is heated, the air temperature at the heater 16 changes little, therefore, it is unnecessary to additionally arrange too many temperature sensors, and the cost is effectively saved.

[0034] The first cooler 13 and the second cooler 14 are connected with a condensate water discharge pipeline 132 below, the condensate water discharge pipeline 132 is connected to a floor drain; the heater 16 and the humidifier 17 are connected with a steam condensate water collection pipeline below, the steam condensate water collection pipeline 162 is provided with a trap 163; the trap 163 is usually installed in a pipeline of a steam heating system or an air conditioning system to ensure that the condensate water can be smoothly discharged, and the efficiency reduction or equipment damage caused by water accumulation is avoided; the fan 15 is electrically connected with an automatic frequency converter 151, and the automatic frequency converter 151 is used for controlling the electronic equipment of the motor rotating speed and the torque.

[0035] The above only describes the preferred embodiments of the present application and is not used to limit the present application; for the person skilled in the art, the present application can have various changes and variations; any modification, equivalent replacement, improvement and the like within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A differential pressure interlock energy saving device suitable for indoor air conditioning, comprising an air handling unit (10), a fresh air section (20) arranged at the front end of the air handling unit (10), a return air section (30) arranged above the air handling unit (10), and a supply air section (40) arranged at the rear end of the air handling unit (10), wherein the return air section (30) comprises an exhaust air pipe (31) communicating with an indoor space, and the indoor space comprises a working device (50) communicating with the exhaust air pipe (31), characterized in that the working device (50) is connected to an energy saving unit (60), the energy saving unit (60) comprises an electrically operated airtight valve (61) arranged on the exhaust air pipe (31) and a variable air volume electric valve (62), the electrically operated airtight valve (61) is electrically connected to the working device (50), the variable air volume electric valve (62) is electrically connected to a differential pressure interlock device arranged in the indoor space, the electrically operated airtight valve (61) is used to control the start / stop of the working device (50), the variable air volume electric valve (62) is used to adjust the air volume of the exhaust air pipe (31), and the differential pressure interlock device is used to monitor the differential pressure between the indoor space and the atmosphere. The differential pressure interlock device (63) comprises a controller (631) and a differential pressure sensor (632) arranged in the indoor space, and the controller (631) is electrically connected to the differential pressure sensor (632).

2. The differential pressure interlock energy saving device for indoor air conditioner according to claim 1, characterized in that, The air handling unit (10) comprises a first filter (11), a second filter (12), a first cooler (13), a second cooler (14), a fan (15), a heater (16), a humidifier (17), and a third filter (18) arranged in sequence, and the air handling unit (10) is used to process mixed air.

3. The differential pressure interlock energy saving device for indoor air conditioner according to claim 2, characterized in that, The exhaust air pipe (31) is connected to a first return air passage (32) and a second return air passage (33), the first return air passage (32) and the second return air passage (33) communicate with the air handling unit (10), the first return air passage (32) is arranged between the first filter (11) and the second filter (12), the second return air passage (33) is arranged between the first cooler (13) and the second cooler (14), and the first return air passage (32) and the second return air passage (33) are used to provide indoor return air.

4. The differential pressure interlock energy saving device for indoor air conditioner according to claim 3, characterized in that, The ratio D1 between the return air volume of the return air section (30) and the supply air volume of the supply air section (40) is 30-40% during the first return air, and the ratio D2 between the return air volume of the return air section (30) and the supply air volume of the supply air section (40) is 60-70% during the second return air.

5. The differential pressure interlock energy saving device for indoor air conditioner according to claim 4, characterized in that, The return air volume ratio D3 between the first return air passage (32) and the exhaust air pipe (31) is 10-15%.

6. The differential pressure interlock energy saving device for indoor air conditioner according to claim 5, characterized in that, ​

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