Heat pump type constant temperature and humidity unit

Abstract

The utility model discloses a heat pump type constant temperature and humidity unit which comprises a compressor, a four-way valve, an outdoor air heat exchanger, an indoor air heat exchanger and a gas-liquid separator, the outdoor air heat exchanger, the indoor air heat exchanger and the gas-liquid separator are connected, an indoor dehumidification heat exchanger is communicated with a liquid storage device, and an expansion valve is arranged between the indoor dehumidification heat exchanger and the liquid storage device. Bypass exhaust gas of the compressor is communicated with the indoor air reheater through a pipeline, and the control adjusting mechanism is used for switching the flow direction of a refrigerant. When the air conditioner is used, the flow direction distribution, summer air heating and winter air dehumidification of refrigerants can be switched through the control and adjustment mechanism used for switching the flow direction of the refrigerating machine, and in summer, compression condensation heat of a refrigerating system is adopted to achieve a reheating function to replace or partially replace an electric heater; the constant-temperature and constant-humidity unit is matched with the four-way valve in winter, the four-way valve operates reversely to achieve heating of the heat pump, an electric heater is replaced or partially replaced, and meanwhile the constant-temperature and constant-humidity unit has the dehumidification capacity in winter which a common constant-temperature and constant-humidity unit does not have.

Description

Technical Field

[0001] This utility model relates to the field of heat pump unit technology, specifically a heat pump type constant temperature and humidity unit. Background Technology

[0002] A constant temperature and humidity unit is a device specifically designed to maintain stable temperature and humidity within a specific environment. It is widely used in places with strict environmental requirements, such as laboratories, hospitals, electronics manufacturing workshops, museums, and archives. Its main function is to regulate the temperature and humidity of the air to ensure that the climate conditions within a set space are maintained within a preset standard range.

[0003] Current temperature and humidity control units use cooling and dehumidification methods in summer, followed by electric heating to maintain indoor relative humidity. The same method applies during transitional seasons. In winter, electric heating is used for heating, and an electric humidifier is used for humidification. This consumes high-grade electricity year-round, which does not meet energy-saving requirements. Furthermore, existing ordinary temperature and humidity control air conditioners cannot meet dehumidification needs in winter. Therefore, we propose a heat pump type temperature and humidity control unit. Utility Model Content

[0004] The purpose of this invention is to provide a heat pump type constant temperature and humidity unit to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heat pump type constant temperature and humidity unit, including a compressor, an indoor dehumidifier heat exchanger, an indoor air heat exchanger, an indoor air reheater, and an outdoor air heat exchanger. The indoor dehumidifier heat exchanger, the indoor air heat exchanger, and the indoor air reheater are sequentially arranged at the air inlet of the unit. The output end of the compressor is connected to a four-way valve, and the other end of the four-way valve is connected to the outdoor air heat exchanger, the indoor air heat exchanger, and a gas-liquid separator, respectively. One end of the outdoor air heat exchanger is connected to a liquid receiver, which is used to receive liquid refrigerant from the outdoor air heat exchanger. The indoor dehumidifier heat exchanger is connected to the liquid receiver, and an expansion valve is provided between the indoor dehumidifier heat exchanger and the liquid receiver. The bypass exhaust of the compressor is connected to the indoor air reheater through a pipe. One end of the circuit of the four-way valve is connected to the gas-liquid separator, and the output end of the gas-liquid separator is connected to the compressor. The unit also includes a control and adjustment mechanism for switching the refrigerant flow direction.

[0006] Furthermore, the control adjustment mechanism includes a first solenoid valve, a third solenoid valve, and a second solenoid valve. The first solenoid valve is disposed between the liquid receiver and the expansion valve. One end of the second solenoid valve is connected to the exhaust side of the compressor, and the other end of the second solenoid valve is connected to the indoor air reheater. One end of the third solenoid valve is connected to the expansion valve, and the other end of the third solenoid valve is connected to the indoor dehumidification heat exchanger.

[0007] Furthermore, it also includes an auxiliary electric heater, a humidifier, a fan, and an air outlet mechanism. The air outlet mechanism is installed at the air outlet position of the unit, and a fan is provided on one side of the air outlet mechanism. The auxiliary electric heater and the humidifier are arranged in sequence between the indoor air reheater and the fan.

[0008] Furthermore, the air outlet mechanism includes a mounting frame, an air outlet duct, a barrier net, a barrier net cleaning mechanism, and a positioning mechanism. Multiple sets of air outlet ducts are installed through the mounting frame. A barrier net is fixedly installed inside the air outlet duct. A barrier net cleaning mechanism for cleaning dust inside the barrier net is slidably connected to the mounting frame. A positioning mechanism for positioning the barrier net cleaning mechanism is provided on the mounting frame.

[0009] Furthermore, the barrier net cleaning mechanism includes a limiting sleeve, a sliding rod, a first connecting frame, and a pushing film. Two sets of limiting sleeves are fixedly installed at the bottom of the mounting frame. A sliding rod is slidably connected inside the limiting sleeve. A first connecting frame is fixedly installed at the bottom of the sliding rod. Multiple sets of pushing films corresponding to the gaps in the barrier net are fixedly installed at the top of the first connecting frame.

[0010] Furthermore, the positioning mechanism includes a second connecting frame, a connecting shaft, a clearance groove, and a positioning pad. The second connecting frame is fixedly installed on the top of the slide rod. An elliptical clearance groove is opened through the second connecting frame. A connecting shaft is fixedly installed on the top of the mounting frame at the position corresponding to the clearance groove. An elliptical positioning pad that fits against the bottom of the second connecting frame is rotatably connected to the outside of the connecting shaft.

[0011] Compared with the prior art, the present invention has the following beneficial effects: When in use, the present invention can switch the refrigerant flow distribution, summer air heating and winter air dehumidification through the control and adjustment mechanism for switching the flow direction of the refrigeration unit. In summer, the reheat function is achieved by using the compression condensation heat of the refrigeration system to replace or partially replace the electric heater. In winter, it works in conjunction with the four-way valve, and the reverse operation of the four-way valve is used to achieve heat pump heating, replacing or partially replacing the electric heater. At the same time, it has the dehumidification capacity in winter that ordinary constant temperature and humidity units do not have. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the system principle of this utility model;

[0013] Figure 2 This is a first perspective structural schematic diagram of the air outlet mechanism of this utility model;

[0014] Figure 3 This is a second perspective view of the air outlet mechanism of this utility model.

[0015] In the diagram: 1 Compressor, 2 Gas-liquid separator, 3 Indoor dehumidifier heat exchanger, 4 Indoor air heat exchanger, 5 Indoor air reheater, 6 Auxiliary electric heater, 7 Humidifier, 8 Fan, 9 Air outlet mechanism, 10 Outdoor air heat exchanger, 11 Four-way valve, 12 Liquid receiver, 13 First solenoid valve, 14 Third solenoid valve, 15 Second solenoid valve, 16 Mounting bracket, 17 Air outlet duct, 18 Barrier mesh, 19 Barrier mesh cleaning mechanism, 20 Positioning mechanism, 21 Limiting sleeve, 22 Slide rod, 23 First connecting bracket, 24 Pushing film, 25 Second connecting bracket, 26 Connecting shaft, 27 Clearance groove, 28 Positioning gasket. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1This utility model provides a technical solution: a heat pump type constant temperature and humidity unit, including a compressor 1, an indoor dehumidifier heat exchanger 3, an indoor air heat exchanger 4, an indoor air reheater 5, and an outdoor air heat exchanger 10. The indoor dehumidifier heat exchanger 3, indoor air heat exchanger 4, and indoor air reheater 5 are sequentially arranged at the air inlet of the unit. The output end of the compressor 1 is connected to a four-way valve 11, and the other end of the four-way valve 11 is connected to the outdoor air heat exchanger 10, the indoor air heat exchanger 4, and a gas-liquid separator 2, respectively. One end of the outdoor air heat exchanger 10 is connected to a liquid receiver 12, which receives liquid refrigerant from the outdoor air heat exchanger 10. The indoor dehumidifier heat exchanger 3 is connected to the liquid receiver 12, and an expansion valve is provided between the indoor dehumidifier heat exchanger 3 and the liquid receiver 12. The bypass exhaust of the compressor 1 is discharged through a pipe and reheated with the indoor air. The refrigerant 5 is connected, and one end of the circuit of the four-way valve 11 is connected to the gas-liquid separator 2. The output end of the gas-liquid separator 2 is connected to the compressor 1 to ensure that the refrigerant returning to the compressor is in a gaseous state, preventing liquid from entering the compressor and causing damage. It also includes a control and adjustment mechanism for switching the refrigerant flow direction. The flow direction control and adjustment mechanism is used to control the refrigerant flow direction distribution, summer air heating, and winter air dehumidification. The control and adjustment mechanism includes a first solenoid valve 13, a third solenoid valve 14, and a second solenoid valve 15. The first solenoid valve 13 is located between the liquid receiver 12 and the expansion valve. One end of the second solenoid valve 15 is connected to the exhaust side of the compressor 1, and the other end of the second solenoid valve 15 is connected to the indoor air reheater 5. One end of the third solenoid valve 14 is connected to the expansion valve, and the other end of the third solenoid valve 14 is connected to the indoor dehumidification heat exchanger 3.

[0018] The first solenoid valve 13 is normally open.

[0019] When cooling mode is required in summer, the refrigerant is compressed from compressor 1 into a high-temperature, high-pressure gas. Then, the four-way valve 11 guides the high-temperature, high-pressure gas into the outdoor air heat exchanger 10. At this time, the outdoor air heat exchanger 10 can be used as a condenser. The refrigerant releases heat to the outside air in the outdoor air heat exchanger 10, changing from a gaseous state to a liquid state. The liquid receiver 12 at this time stores the liquid refrigerant from the outdoor air heat exchanger 10 and ensures that there is an appropriate amount of refrigerant circulating in the system. The expansion valve then reduces the pressure and temperature of the refrigerant, enabling it to effectively absorb heat in the indoor air heat exchanger 4. At this time, the indoor air heat exchanger 4 is used as an evaporator. The low-temperature, low-pressure refrigerant absorbs heat from the indoor air here, achieving a cooling effect.

[0020] And when the function needs time to reheat:

[0021] If it is necessary to reheat the cooled air, the second solenoid valve 15 opens, allowing a portion of the compressor 1 exhaust to bypass into the indoor air reheater 5. The refrigerant returns to the gas-liquid separator 2 through the four-way valve 11. At this time, the gas-liquid separator 2 can ensure that the refrigerant returning to the compressor 1 is in a gaseous state, preventing liquid from entering the compressor 1 and causing damage, thus completing the entire refrigeration cycle.

[0022] And when heating mode is needed in winter;

[0023] The refrigerant is compressed into a high-temperature, high-pressure gas from the compressor 1. At this time, the four-way valve 11 changes the flow direction, guiding the high-temperature, high-pressure gas directly into the indoor air heat exchanger 4. The indoor air heat exchanger 4 is used as a condenser, and the refrigerant releases heat to the indoor air to achieve a heating effect. The expansion valve can reduce the pressure and temperature of the refrigerant.

[0024] When dehumidification is required, the third solenoid valve 14 opens, allowing some refrigerant to flow to the indoor dehumidification heat exchanger 3. This first cools and dehumidifies the air entering the unit. At this time, the outdoor air heat exchanger 10 acts as an evaporator. The low-temperature, low-pressure refrigerant absorbs heat from the outside air and transforms into a gaseous state. Subsequently, the refrigerant returns to the gas-liquid separator 2 through the four-way valve 11. The gas-liquid separator 2 ensures that the refrigerant returning to the compressor is in a gaseous state, preventing liquid from entering the compressor 1 and causing damage. This completes the entire heating cycle. The four-way valve 11 is used to switch the flow direction of the refrigerant, realizing the conversion between cooling and heating modes.

[0025] The second solenoid valve 15 controls whether the indoor air reheater 5 is activated, which is suitable for situations where the outlet air temperature needs to be adjusted in summer.

[0026] The third solenoid valve 14 controls whether the indoor dehumidifier heat exchanger 3 is activated, which is suitable for situations where dehumidification is required in winter.

[0027] This cycle demonstrates how the same system can be used to efficiently provide cooling, heating, and humidity control functions in different seasons.

[0028] Please see Figure 1 It also includes an auxiliary electric heater 6, a humidifier 7, a fan 8, and an air outlet mechanism 9. The air outlet mechanism 9 is installed at the air outlet position of the unit. A fan 8 is provided on one side of the air outlet mechanism 9. The auxiliary electric heater 6 and the humidifier 7 are arranged in sequence between the indoor air reheater 5 and the fan 8.

[0029] In some cases, even if the air temperature after refrigerant circulation fails to reach the target temperature, the auxiliary electric heater 6 can further heat the air. The humidifier 7 increases the moisture content of the air by converting water into fine droplets or steam. The fan 8 is responsible for driving airflow, completing the temperature and humidity regulation process, and sending the treated air into the room.

[0030] Please see Figure 2 and Figure 3 The air outlet mechanism 9 includes a mounting frame 16, an air outlet duct 17, a barrier net 18, a barrier net cleaning mechanism 19, and a positioning mechanism 20. Multiple sets of air outlet ducts 17 are installed through the mounting frame 16. A barrier net 18 is fixedly installed inside the air outlet duct 17. A barrier net cleaning mechanism 19 for cleaning dust inside the barrier net 18 is slidably connected to the mounting frame 16. A positioning mechanism 20 for positioning the barrier net cleaning mechanism 19 is provided on the mounting frame 16. The barrier net cleaning mechanism 19 includes a limiting sleeve 21, a sliding rod 22, a first connecting frame 23, and a pushing film 24. Two sets of limiting sleeves 21 are fixedly installed at the bottom of the mounting frame 16. A sliding rod 22 is slidably connected inside the limiting sleeve 21. A first connecting frame 23 is fixedly installed at the bottom of the sliding rod 22. Multiple sets of pushing films 24 corresponding to the gaps in the barrier net 18 are fixedly installed at the top of the first connecting frame 23.

[0031] The air outlet duct 17 can be easily connected with the fan 8 to output the treated air, and the barrier net 18 can prevent large impurities from entering the unit. When the barrier net 18 needs to be cleaned, the slide bar 22 is pulled, so that the slide bar 22, the first connecting frame 23 and the pusher film 24 move upward along the gap of the barrier net 18, so that the dust in the gap of the barrier net 18 can be pushed out and cleaned by the pusher film 24.

[0032] Please see Figure 2 and Figure 3 The positioning mechanism 20 includes a second connecting frame 25, a connecting shaft 26, a clearance groove 27, and a positioning pad 28. The second connecting frame 25 is fixedly installed on the top of the slide rod 22. An elliptical clearance groove 27 is provided through the second connecting frame 25. The connecting shaft 26 is fixedly installed on the top of the mounting frame 16 at the position corresponding to the clearance groove 27. An elliptical positioning pad 28 that fits against the bottom of the second connecting frame 25 is rotatably connected to the outside of the connecting shaft 26.

[0033] After the push film 24 is pulled upward, the clearance groove 27 on the second connecting frame 25 allows the connecting shaft 26 and the elliptical positioning pad 28 to pass through and move to the bottom of the second connecting frame 25. Then, the positioning pad 28 is rotated so that the elliptical positioning pad 28 is misaligned with the elliptical clearance groove 27. This allows the positioning pad 28 to overlap the bottom of the second connecting frame 25, thus enabling the second connecting frame 25 to complete the positioning and locking of the push film 24, which facilitates the cleaning of the gaps in the barrier net 18.

[0034] When in use, the first solenoid valve 13 is set to the normally open state.

[0035] When cooling mode is required in summer, the refrigerant is compressed from compressor 1 into a high-temperature, high-pressure gas. Then, four-way valve 11 guides the high-temperature, high-pressure gas into outdoor air heat exchanger 10. At this time, outdoor air heat exchanger 10 can be used as a condenser. The refrigerant releases heat to the outside air in outdoor air heat exchanger 10, changing from a gaseous state to a liquid state. Meanwhile, the liquid receiver 12 stores the liquid refrigerant from outdoor air heat exchanger 10, ensuring an appropriate amount of refrigerant circulating in the system. The expansion valve then reduces the pressure and temperature of the refrigerant, enabling it to effectively exchange heat with the indoor air. The refrigerant absorbs heat in refrigerant 4, which acts as an evaporator. The low-temperature, low-pressure refrigerant absorbs heat from the indoor air, achieving a cooling effect. When a reheat function is needed: if reheating of the cooled air is required, the second solenoid valve 15 opens, allowing a portion of the compressor 1 exhaust to bypass into the indoor air reheater 5. The refrigerant returns to the gas-liquid separator 2 via the four-way valve 11. The gas-liquid separator 2 ensures that only gaseous refrigerant returns to the compressor 1, preventing liquid from entering and damaging it, thus completing the entire refrigeration cycle. In winter, when heating mode is needed: the refrigerant is compressed from the compressor 1 into a high-temperature, high-pressure gas. The four-way valve 11 changes the flow direction, guiding the high-temperature, high-pressure gas directly into the indoor air refrigerant 4. The indoor air refrigerant 4 then acts as a condenser, releasing heat to the indoor air, achieving a heating effect. The expansion valve reduces the refrigerant pressure and temperature. When dehumidification is required, the third solenoid valve 14 opens, allowing some refrigerant to flow to the indoor dehumidifying heat exchanger 3. This first cools and dehumidifies the air entering the unit. At this time, the outdoor air heat exchanger 10 acts as an evaporator. The low-temperature, low-pressure refrigerant absorbs heat from the outside air and transforms into a gaseous state. Subsequently, the refrigerant returns to the gas-liquid separator 2 through the four-way valve 11. The gas-liquid separator 2 ensures that the refrigerant returning to the compressor is in a gaseous state, preventing liquid from entering the compressor 1 and causing damage. This completes the entire heating cycle. The four-way valve 11 is used to switch the flow of refrigerant, enabling the conversion between cooling and heating modes. The second solenoid valve 15 controls whether the indoor air reheater 5 is activated, which is suitable for situations where the outlet air temperature needs to be adjusted in summer. The third solenoid valve 14 controls whether the indoor dehumidifying heat exchanger 3 is activated, which is suitable for situations where dehumidification is required in winter.This cyclical process demonstrates how the same system can efficiently provide cooling, heating, and humidity control functions in different seasons. The air outlet duct 17 can be easily connected to the fan 8 to output the treated air, and the baffle 18 can prevent large impurities from entering the unit. When it is necessary to clean the baffle 18, pull the slide bar 22, which moves the slide bar 22, the first connecting bracket 23, and the pusher plate 24 upwards along the gaps in the baffle 18. The pusher plate 24 can then be used to clean the gaps in the baffle 18. Dust is pushed out and cleaned. After the pusher film 24 is pulled up, the clearance groove 27 on the second connecting frame 25 allows the connecting shaft 26 and the elliptical positioning pad 28 to pass through and move to the bottom of the second connecting frame 25. Then, the positioning pad 28 is rotated so that the elliptical positioning pad 28 is misaligned with the elliptical clearance groove 27. This allows the positioning pad 28 to overlap the bottom of the second connecting frame 25, thus enabling the second connecting frame 25 to complete the positioning and locking of the pusher film 24, which makes it convenient to clean the gaps in the barrier net 18.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat pump type constant temperature and humidity unit, comprising a compressor (1), an indoor dehumidifying heat exchanger (3), an indoor air heat exchanger (4), an indoor air reheater (5), and an outdoor air heat exchanger (10), characterized in that: The unit's air inlet is sequentially equipped with an indoor dehumidifying heat exchanger (3), an indoor air heat exchanger (4), and an indoor air reheater (5). The output end of the compressor (1) is connected to a four-way valve (11), the other end of which is connected to an outdoor air heat exchanger (10), an indoor air heat exchanger (4), and a gas-liquid separator (2). One end of the outdoor air heat exchanger (10) is connected to a liquid receiver (12), which is used to receive air from the outdoor air heat exchanger. The liquid refrigerant of the heater (10), the indoor dehumidifying heat exchanger (3) is connected to the liquid receiver (12), an expansion valve is provided between the indoor dehumidifying heat exchanger (3) and the liquid receiver (12), the bypass exhaust of the compressor (1) is connected to the indoor air reheater (5) through a pipe, one end of the circuit of the four-way valve (11) is connected to the gas-liquid separator (2), the output end of the gas-liquid separator (2) is connected to the compressor (1), and a control adjustment mechanism for switching the refrigerant flow direction is also included.

2. The heat pump type constant temperature and humidity unit according to claim 1, characterized in that: The control and adjustment mechanism includes a first solenoid valve (13), a third solenoid valve (14), and a second solenoid valve (15). The first solenoid valve (13) is located between the liquid receiver (12) and the expansion valve. One end of the second solenoid valve (15) is connected to the exhaust side of the compressor (1), and the other end of the second solenoid valve (15) is connected to the indoor air reheater (5). One end of the third solenoid valve (14) is connected to the expansion valve, and the other end of the third solenoid valve (14) is connected to the indoor dehumidification heat exchanger (3).

3. A heat pump type constant temperature and humidity unit according to claim 2, characterized in that: It also includes an auxiliary electric heater (6), a humidifier (7), a fan (8) and an air outlet mechanism (9). The air outlet mechanism (9) is installed at the air outlet of the unit. A fan (8) is provided on one side of the air outlet mechanism (9). The auxiliary electric heater (6) and the humidifier (7) are arranged in sequence between the indoor air reheater (5) and the fan (8).

4. A heat pump type constant temperature and humidity unit according to claim 3, characterized in that: The air outlet mechanism (9) includes a mounting frame (16), an air outlet pipe (17), a barrier net (18), a barrier net cleaning mechanism (19), and a positioning mechanism (20). Multiple sets of air outlet pipes (17) are installed through the mounting frame (16). A barrier net (18) is fixedly installed inside the air outlet pipe (17). A barrier net cleaning mechanism (19) for cleaning dust inside the barrier net (18) is slidably connected to the mounting frame (16). A positioning mechanism (20) for positioning the barrier net cleaning mechanism (19) is provided on the mounting frame (16).

5. A heat pump type constant temperature and humidity unit according to claim 4, characterized in that: The barrier net cleaning mechanism (19) includes a limiting sleeve (21), a sliding rod (22), a first connecting frame (23), and a pushing film (24). Two sets of limiting sleeves (21) are fixedly installed at the bottom of the mounting frame (16). The sliding rod (22) is slidably connected inside the limiting sleeve (21). The first connecting frame (23) is fixedly installed at the bottom of the sliding rod (22). Multiple sets of pushing films (24) corresponding to the gap positions of the barrier net (18) are fixedly installed at the top of the first connecting frame (23).

6. A heat pump type constant temperature and humidity unit according to claim 5, characterized in that: The positioning mechanism (20) includes a second connecting frame (25), a connecting shaft (26), a clearance groove (27), and a positioning pad (28). The second connecting frame (25) is fixedly installed on the top of the slide rod (22). An elliptical clearance groove (27) is opened through the second connecting frame (25). The connecting shaft (26) is fixedly installed on the top of the mounting frame (16) at the position corresponding to the clearance groove (27). An elliptical positioning pad (28) that fits against the bottom of the second connecting frame (25) is rotatably connected to the outside of the connecting shaft (26).

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