CN210624990U

CN210624990U - Cold-warm type heat recovery system

Info

Publication number: CN210624990U
Application number: CN201920584882.9U
Authority: CN
Inventors: 韩本强; 薛怒涛; 罗应文
Original assignee: Dongguan Kinfit Air Conditioning Co ltd; Guangzhou Join Electronic & Technological Co ltd
Current assignee: Dongguan Kinfit Air Conditioning Co ltd; Guangzhou Join Electronic & Technological Co ltd
Priority date: 2019-01-18
Filing date: 2019-04-26
Publication date: 2020-05-26
Anticipated expiration: 2029-04-26

Abstract

The utility model provides a cooling and heating type heat recovery system, which comprises an indoor heat exchanger, a four-way valve, a compressor module, a heat recovery heat exchanger, a first PWM flow control valve, a second PWM flow control valve, an outdoor heat exchanger and a plurality of pipelines, wherein a connecting end of the indoor heat exchanger is connected with an E port of the four-way valve through a pipeline, an S port of the four-way valve is connected with an input end of the compressor module through a pipeline, an output end of the compressor module is connected with a D port of the four-way valve through a pipeline, the pipeline connected with the C port of the four-way valve is divided into two pipelines, the first PWM flow control valve, the heat recovery heat exchanger and a first check, and the other pipeline is sequentially provided with a second PWM flow control valve, an outdoor heat exchanger, a second check valve, a first drying filter and a first expansion valve which are connected with the second check valve in parallel. The system has obvious energy-saving effect, replaces the existing electric heating mode, and reduces the energy consumption and the use cost.

Description

Cold-warm type heat recovery system

Technical Field

The utility model relates to an air conditioning equipment, in particular to cold and warm type heat recovery system.

Background

The conventional air cabinet system generally comprises an air inlet section, a filtering section, an evaporation cooling section, an overhaul section, an electric heating section, a steam humidifying section and a fan air outlet section. The air inlet section is used for connecting an air inlet pipe; the filtering section is used for installing a filter to ensure the cleanliness of filtered air; the evaporation cooling section is used for cooling and dehumidifying the passing air by an evaporator of the refrigerating system; the electric heating section is used for heating air; the steam humidifying section is used for humidifying air; the air outlet section of the fan is used for connecting an air supply pipeline; the air supply of the air cabinet can ensure constant temperature and humidity. However, the conventional wind cabinet system has disadvantages in that: after passing through the evaporation and temperature reduction section, the air is heated through the electric heating section, so that the energy consumption is high by using electric heating, and the use cost is high.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a cold and warm type heat recovery system, this cold and warm type heat recovery system have energy-concerving and environment-protective and the lower advantage of use cost.

The utility model relates to a technical solution:

a cooling and heating type heat recovery system comprises an indoor heat exchanger, a four-way valve, a compressor module, a heat recovery heat exchanger, a first PWM flow control valve, a second PWM flow control valve, an outdoor heat exchanger and a plurality of pipelines, wherein the four-way valve is provided with four ports which are respectively an E port, a D port, a C port and an S port, a connecting end of the indoor heat exchanger is connected with the E port of the four-way valve through the pipeline, the S port of the four-way valve is connected with an input end of the compressor module through the pipeline, an output end of the compressor module is connected with the D port of the four-way valve through the pipeline, the pipeline connected with the C port of the four-way valve is divided into two paths, the first PWM flow control valve, the heat recovery heat exchanger and a first check valve are sequentially arranged on one path of pipeline, the second PWM flow control valve, the outdoor heat exchanger, the second check valve, a first, the pipeline that second check valve connects out and the pipeline that first check valve connects out connect to the reservoir in parallel, and the reservoir is connected to indoor heat exchanger again behind the pipeline connection third check valve, and parallelly connected second drier-filter and the second expansion valve of being provided with on the third check valve.

Furthermore, a gas-liquid separator is arranged on a pipeline connecting the S port of the four-way valve and the compressor module.

Furthermore, a low-pressure switch and an air suction temperature monitoring device are sequentially arranged on a pipeline connected with the gas-liquid separator and the compressor module.

Furthermore, the compressor module comprises a digital compressor, a fixed-frequency compressor and an oil separator, a PWM (pulse-width modulation) regulating valve is connected between an input end pipeline of the digital compressor and a regulating chamber of the digital compressor through a pipeline, an output end of the digital compressor and an output end of the fixed-frequency compressor are connected to an input end of the oil separator in parallel through a pipeline, and an output end of the oil separator is connected with a D port of the four-way valve through a pipeline.

Furthermore, a one-way valve is connected to the pipeline at the output end of the digital compressor.

Further, the digital compressor and the fixed-frequency compressor are respectively connected with the oil separator through pipelines.

Furthermore, a high-pressure switch and an exhaust temperature monitoring device are arranged on a pipeline connecting the output ends of the digital compressor and the fixed-frequency compressor with the oil separator.

Furthermore, the compressor module is a digital compressor, or a plurality of digital compressors are used in parallel, or a digital compressor is used in parallel with a plurality of fixed-frequency compressors, or a plurality of fixed-frequency compressors are used in parallel, or a variable-capacity compressor is used in parallel with a fixed-frequency compressor.

Further, the indoor heat exchanger and the heat recovery heat exchanger adopt fin type heat exchangers or micro-channel heat exchangers.

Further, the outdoor heat exchanger adopts a fin type heat exchanger, a micro-channel heat exchanger or a water-cooling heat exchanger.

Through the cooperation of first PWM flow control valve and second PWM flow control valve, the adjustment comes control heat recovery heat exchanger to the heat input through the air through heat recovery heat exchanger's refrigerant quantity, and make full use of retrieves the heat of discharging to atmospheric and heats the air of process, need not electric heating, and energy-conserving effect is very showing, has effectively replaced current electric heating mode, has reduced energy consumption and use cost.

Drawings

Fig. 1 is a schematic view of the pipe connection structure of the cooling and heating type heat recovery system of the present invention.

Detailed Description

The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the drawings in the embodiment of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.

Referring to fig. 1, the present invention provides a cooling and heating type heat recovery system, which includes an indoor heat exchanger 1, a four-way valve 2, a compressor module 3, a heat recovery heat exchanger 4, a first PWM flow control valve 5, a second PWM flow control valve 6, an outdoor heat exchanger 7, and a plurality of pipes 8, wherein the four-way valve 2 has four ports, which are respectively an E port, a D port, a C port, and an S port, a connection end of the indoor heat exchanger 1 is connected to the E port of the four-way valve 2 through the pipe 8, the S port of the four-way valve 2 is connected to an input end of the compressor module 3 through the pipe 8, an output end of the compressor module 3 is connected to the D port of the four-way valve 2 through the pipe 8, the pipe 8 connected to the C port of the four-way valve 2 is divided into two paths, the first PWM flow control valve 5, the other pipeline 8 is sequentially provided with a second PWM flow control valve 6, an outdoor heat exchanger 7, a second check valve 71, a first drying filter 72 and a first expansion valve 73 which are connected with the second check valve 71 in parallel, the pipeline 8 connected with the second check valve 71 and the pipeline 8 connected with the first check valve 41 are connected with a liquid storage device 74 in parallel, the liquid storage device 74 is connected with a third check valve 75 through the pipeline 8 and then connected with the indoor heat exchanger 1, and the third check valve 75 is provided with a second drying filter 76 and a second expansion valve 77 in parallel.

A pipeline 8, which is connected with the compressor module 3, of the S port of the four-way valve 2 is provided with a gas-liquid separator 9, and the gas-liquid separator 9 is used for separating gas and liquid of refrigerant of the compressor, so that the refrigerant liquid is prevented from entering the compressor, and the compressor is prevented from being subjected to liquid impact and damaged.

A low-pressure switch 10 and an air suction temperature monitoring device 11 are sequentially arranged on a pipeline 8 connecting a gas-liquid separator 9 and a compressor module 3, when the pressure of the low-pressure side of the refrigeration system is lower than the protection pressure (namely the designed disconnection pressure of the low-pressure switch), the low-pressure switch is disconnected, a signal is sent to a controller, the system is protected to stop, and an alarm signal is sent out at the same time; the suction temperature monitoring device 11 is used to measure the temperature of the suction gas of the compressor (i.e. the return temperature) for monitoring whether the system is operating normally, and in the system throttled by the electronic expansion valve, the suction temperature is also used to measure the suction superheat of the refrigerant, and the opening degree of the electronic expansion valve is controlled by the suction superheat.

In this embodiment, the compressor module 3 includes a digital compressor 31, a fixed-frequency compressor 32 and an oil separator 33, and a PWM regulating valve 34 is connected between the input end pipe 8 of the digital compressor 31 and the regulating chamber of the digital compressor 31 through the pipe 8 for regulating the capacity of the digital compressor 31; the output end of the digital compressor 31 and the output end of the fixed-frequency compressor 32 are connected in parallel to the input end of the oil separator 33 through the pipeline 8, and the output end of the oil separator 33 is connected with the D port of the four-way valve 2 through the pipeline 8.

The output end pipeline 8 of the digital compressor 31 is connected with a one-way valve 37, so that the digital compressor can prevent the high-pressure gas on the exhaust side from flowing back to the exhaust port of the digital compressor 31 when the adjustment is unloaded.

A high-pressure switch 35 and an exhaust temperature monitoring device 36 are arranged on the pipeline 8 connecting the output ends of the digital compressor 31 and the fixed-frequency compressor 32 with the oil separator 33, when the pressure of the high-pressure side of the refrigeration system is higher than the protection pressure (namely the disconnection pressure designed by the high-pressure switch), the high-pressure switch is disconnected, a signal is sent to the controller, the system is protected to stop, and an alarm signal is given at the same time; the exhaust temperature monitoring device 36 is used for measuring the exhaust temperature of the digital compressor 31 and the fixed-frequency compressor 32, preventing the exhaust temperature from being too high (actually preventing the motor inside the compressor from being damaged due to too high temperature), sending a signal to the controller when the exhaust temperature is too high, protecting the system and stopping the system, and simultaneously giving an alarm signal.

The digital compressor 31 and the fixed-frequency compressor 32 are respectively connected with the oil separator 33 through the pipeline 8 to separate compressor refrigeration oil (i.e. compressor lubricating oil) discharged along with the refrigerant, and the compressor refrigeration oil is sent back to the digital compressor 31 and the fixed-frequency compressor 32 again to prevent the compressor from being damaged due to oil shortage.

According to the actual use requirement, the compressor module 3 can be one digital compressor 31, or a plurality of digital compressors 31 connected in parallel, or one digital compressor 31 connected in parallel with a plurality of fixed frequency compressors 32, or only a plurality of fixed frequency compressors 32 connected in parallel, or a variable capacity compressor connected in parallel with the fixed frequency compressors 32.

The indoor heat exchanger 1, the heat recovery heat exchanger 4 and the outdoor heat exchanger 7 can all adopt fin type heat exchangers or micro-channel heat exchangers. The outdoor heat exchanger 7 may also be a water-cooled heat exchanger.

During cooling, the refrigerant flows in the direction of the dotted arrow shown in fig. 1, thereby forming a refrigeration cycle.

When refrigeration is needed, the four-way valve 2 is not electrified, the four-way valve 2 is in a state that an E port is communicated with an S port, and a D port is communicated with a C port, refrigerant is compressed by the compressor module 3 and converted into high-temperature and high-pressure gas, the high-temperature and high-pressure gas passes through the D port of the four-way valve 2 and is discharged from the C port in two paths, one path of the gas is discharged to the liquid storage device 74 through the first PWM flow control valve 5, the heat recovery heat exchanger 4 and the first check valve 41, the other path of the gas is discharged to the liquid storage device 74 through the second PWM flow control valve 6, the outdoor heat exchanger 7 (condenser) and the second check valve 71, the gas is discharged from the liquid storage device 74 to the indoor heat exchanger 1 (evaporator) through the second drying filter 76 and the second expansion valve 77, the gas is changed into low-temperature and low-pressure gas after the, thus forming a refrigeration cycle.

Through the cooperation of first PWM flow control valve 5 and second PWM flow control valve 6, the adjustment comes control heat recovery heat exchanger 4 to the heat input through the air through the refrigerant quantity of heat recovery heat exchanger 4, and make full use of retrieves the heat of discharging to atmospheric and heats the air of process, need not electric heating, and energy-conserving effect is very showing, has effectively replaced current electric heating mode, has reduced energy consumption and use cost.

During heating, the refrigerant flows in the direction of the solid arrow shown in fig. 1, forming a heating cycle.

When heating, the four-way valve 2 is powered on, the D port and the E port of the four-way valve 2 are communicated, the C port and the S port are communicated, refrigerant is compressed by the compressor module 3 and is converted into high-temperature and high-pressure gas, the high-temperature and high-pressure gas passes through the D port of the four-way valve 2 and is discharged from the E port, enters the indoor heat exchanger 1 (condenser), is converted into medium-temperature and high-pressure liquid after being cooled and released by the condenser, and returns to the compressor module 3 after sequentially passing through the third check valve 75, the liquid storage device 74, the first drying filter 72, the first expansion valve 73, the outdoor heat exchanger 7, the second PWM flow control valve 6, the C port.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transformation that the content of the specification does, or directly or indirectly use in other related technical fields, all including in the same way the patent protection scope of the present invention.

Claims

1. The utility model provides a cold-warm type heat recovery system, a serial communication port, including indoor heat exchanger (1), cross valve (2), compressor module (3), heat recovery heat exchanger (4), first PWM flow control valve (5), second PWM flow control valve (6), outdoor heat exchanger (7) and a plurality of pipeline (8), cross valve (2) have four ports, be the E port respectively, the D port, C port and S port, a connection end of indoor heat exchanger (1) passes through pipeline (8) and is connected with the E port of cross valve (2), the S port of cross valve (2) passes through pipeline (8) and is connected with the input of compressor module (3), the output of compressor module (3) passes through pipeline (8) and is connected with the D port of cross valve (2), pipeline (8) that the C port of cross valve (2) is connected divide into two, pipeline (8) are provided with first PWM flow control valve (5) in proper order on one way pipeline (8), The heat recovery heat exchanger comprises a heat recovery heat exchanger (4) and a first check valve (41), a second PWM flow control valve (6), an outdoor heat exchanger (7), a second check valve (71), a first drying filter (72) and a first expansion valve (73) which are arranged in parallel with the second check valve (71) are sequentially arranged on the other pipeline (8), the pipeline (8) connected out of the second check valve (71) and the pipeline (8) connected out of the first check valve (41) are connected in parallel to a liquid storage device (74), the liquid storage device (74) is connected with a third check valve (75) through the pipeline (8) and then connected to the indoor heat exchanger (1), and a second drying filter (76) and a second expansion valve (77) are arranged in parallel on the third check valve (75).

2. A cooling-heating type heat recovery system according to claim 1, wherein a gas-liquid separator (9) is provided on a pipe (8) connecting an S port of the four-way valve (2) and the compressor module (3).

3. A cooling and heating type heat recovery system according to claim 2, wherein the pipeline (8) connecting the gas-liquid separator (9) and the compressor module (3) is provided with a low-pressure switch (10) and a suction temperature monitoring device (11) in sequence.

4. The cooling and heating type heat recovery system according to claim 1, wherein the compressor module (3) comprises a digital compressor (31), a fixed frequency compressor (32) and an oil separator (33), a PWM regulating valve (34) is connected between an input end pipeline (8) of the digital compressor (31) and a regulating chamber of the digital compressor (31) through a pipeline (8), an output end of the digital compressor (31) and an output end of the fixed frequency compressor (32) are connected in parallel to an input end of the oil separator (33) through a pipeline (8), and an output end of the oil separator (33) is connected with a D port of the four-way valve (2) through a pipeline (8).

5. A heating and cooling type heat recovery system as claimed in claim 4, wherein a check valve (37) is connected to the output side pipe (8) of the digital compressor (31).

6. A heating and cooling type heat recovery system as claimed in claim 4, wherein the digital compressor (31) and the fixed frequency compressor (32) are connected to the oil separator (33) through pipes (8), respectively.

7. A heating and cooling type heat recovery system as claimed in claim 4, wherein the pipeline (8) connecting the output ends of the digital compressor (31) and the fixed frequency compressor (32) with the oil separator (33) is provided with a high pressure switch (35) and an exhaust temperature monitoring device (36).

8. The heating and cooling type heat recovery system according to claim 4, wherein the compressor module (3) is a digital compressor (31), or a plurality of digital compressors (31) are used in parallel, or a digital compressor (31) is used in parallel with a plurality of fixed frequency compressors (32), or a plurality of fixed frequency compressors (32) are used in parallel, or a variable capacity compressor is used in parallel with a fixed frequency compressor (32).

9. A heating and cooling type heat recovery system as claimed in claim 1, wherein the indoor heat exchanger (1) and the heat recovery heat exchanger (4) employ a fin type heat exchanger or a micro-channel heat exchanger.

10. A heating and cooling type heat recovery system according to claim 1, wherein the outdoor heat exchanger (7) employs a fin heat exchanger, a micro-channel heat exchanger or a water-cooled heat exchanger.