Air conditioning system for medical bed

Abstract

The invention discloses an air conditioning system for a medical bed, which comprises a refrigerant circulation subsystem and a cooling liquid circulation subsystem which are arranged outside the medical bed, and further comprises a plurality of air cooling units, and the refrigerant in the refrigerant circulation subsystem exchanges heat with the cooling liquid in the cooling liquid circulation subsystem; each cooling unit is arranged in a breathable mattress of the medical bed; each cooling unit comprises a circulating water pump, a fan, a heat exchanger and a one-way valve; cooling liquid from the cooling liquid circulation subsystem is input into the circulating water pump in each cooling unit, the cooling liquid sequentially flows through the heat exchanger and the one-way valve and then returns to the cooling liquid circulation subsystem, air passing through the heat exchanger is formed by the fan and exchanges heat with the cooling liquid, and the cooled and dehumidified air is sent to the holes in the surface of the breathable mattress by the fan. According to the invention, the sweating probability of a patient and the bedsore occurrence probability of the patient can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical equipment air conditioning, in particular to a medical bed air conditioning system. BACKGROUND

[0002] At present, hospitals and health institutions have a large number of medical beds in use, most of which are composed of simple bed frames and breathable mattresses. The comfort of patients lying on the medical beds is not high, especially for patients who are paralyzed or cannot move freely. When lying on the medical bed in summer, it is difficult for the body to dissipate heat due to long-term contact with the breathable mattress, resulting in a higher temperature at the contact between the body and the breathable mattress. The patient's body is prone to heavy sweating at the contact with the breathable mattress, and the body surface is prone to bacterial growth, which is not conducive to the patient's health recovery. In addition, the patient's body is prone to bedsores unless the medical staff frequently turns the patient over. Therefore, there is an urgent need to develop an additional device for ordinary medical beds to solve the problem of sweating and bedsores of immobile patients caused by existing medical beds. SUMMARY

[0003] The present application provides a medical bed air conditioning system to solve the problem of sweating and bedsores of immobile patients existing in the prior art medical beds.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A medical bed air conditioning system, comprising a refrigerant circulation subsystem and a cooling liquid circulation subsystem arranged outside the medical bed, the refrigerant in the refrigerant circulation subsystem and the cooling liquid in the cooling liquid circulation subsystem are subjected to heat exchange, so that the cooling liquid in the cooling liquid circulation subsystem is cooled, and the system further comprises a plurality of cold air units, each cold air unit is arranged in the breathable mattress of the medical bed; each cold air unit comprises a circulating water pump, a fan, a heat exchanger, and a check valve; the circulating water pump in each cold air unit respectively inputs the cooled cooling liquid from the cooling liquid circulation subsystem, and the cooling liquid is sequentially flowed through the heat exchanger and the check valve by the circulating water pump and then sent back to the cooling liquid circulation subsystem; the fan in each cold air unit forms air that passes through the heat exchanger, the air is subjected to heat exchange with the cooling liquid flowed through the heat exchanger to be cooled, and the dry air after cooling and dehumidification is sent to the holes on the surface of the breathable mattress by the fan.

[0005] Further, the refrigerant circulation subsystem comprises a compressor (1), a condenser (3) with a condensing fan (2), a liquid accumulator (4), a filter (5), a thermal expansion valve (6), and an evaporator (7), wherein the evaporator (7) is a plate heat exchanger having a refrigerant flow channel and a cooling liquid flow channel; the refrigerant output by the compressor (1) sequentially passes through the condenser (3), the liquid accumulator (4), the filter (5), the thermal expansion valve (6), and the refrigerant flow channel in the evaporator (7) and then returns to the compressor (1), thereby forming a refrigerant circulation.

[0006] Furthermore, the coolant circulation subsystem includes a water tank (13), a water pump (9), and a coolant flow channel for the evaporator (7) in the refrigerant circulation subsystem. The water pump (9) transports the coolant in the water tank (13) to the coolant flow channel of the evaporator (7). After passing through the coolant flow channel of the evaporator (7), the coolant returns to the water tank (13), thereby forming a coolant circulation. The water tank (13) is also connected to the circulating water pump in each air-cooled unit, and the circulating water pump in each air-cooled unit draws coolant from the water tank (13).

[0007] Furthermore, it also includes a controller (12) and an auxiliary temperature sensor and a flow switch (11). The flow switch (11) is used to collect the flow rate of coolant from the coolant channel of the evaporator (7) to the water tank (13) in the coolant circulation subsystem. The temperature sensor is used to collect the temperature of coolant from the water tank (13) to the water pump (9) in the coolant circulation subsystem. The flow switch (11) and the temperature sensor are respectively electrically connected to the controller (12) for signal transmission. The controller (12) is electrically connected to the compressor (1) in the refrigerant circulation subsystem for control.

[0008] This invention is integrated into a medical bed, which can provide a cool environment for patients who are paralyzed or unable to move freely while lying on the medical bed in hot weather, reducing the chances of patients sweating and developing bedsores. Attached Figure Description

[0009] Figure 1 This is a structural diagram of an embodiment of the present invention.

[0010] Figure 2 This is a schematic diagram of the integrated structure of a single air-cooling unit in a breathable mattress of a medical bed, as described in an embodiment of the present invention. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] like Figure 1 As shown, this embodiment discloses an air conditioning system for a medical bed, including a refrigerant circulation subsystem, a coolant circulation subsystem, and several air cooling units integrated into the breathable mattress of the medical bed.

[0013] The refrigerant circulation subsystem is arranged outside the breathable mattress of the medical bed, and comprises a compressor 1, a condenser 3 provided with a condensing fan 2, a liquid accumulator 4, a filter 5, a thermal expansion valve 6, and an evaporator 7. The evaporator 7 is a plate heat exchanger, and has a refrigerant flow channel and a cooling liquid flow channel. The refrigerant outlet of the compressor 1 is connected to one end of the condenser 3 through a pipeline, the other end of the condenser 3 is connected to the inlet of the liquid accumulator 4 through a pipeline, the outlet of the liquid accumulator 4 is connected to the inlet of the dry filter 5 through a pipeline, the outlet of the dry filter 5 is connected to the inlet of the thermal expansion valve 6 through a pipeline, the outlet of the thermal expansion valve 6 is connected to one end of the refrigerant flow channel of the evaporator 7 through a pipeline, and the other end of the refrigerant flow channel of the evaporator 7 is connected to the refrigerant return inlet of the compressor 1 through a pipeline.

[0014] In the refrigerant circulation subsystem, the compressor 1 compresses the refrigerant into high-temperature and high-pressure gas and delivers the refrigerant to the condenser 3. The refrigerant is cooled into high-pressure liquid in the condenser 3 (the heat is taken away by the wind blown by the condensing fan 2), and the high-pressure refrigerant liquid sequentially flows through the liquid accumulator 4, is filtered through the filter 5, is throttled and depressurized through the thermal expansion valve 6 (throttling device), and then flows into the refrigerant flow channel of the evaporator 7 (plate heat exchanger). The low-pressure liquid refrigerant evaporates and absorbs heat in the refrigerant flow channel of the evaporator 7, so that the cooling liquid flowing through the cooling liquid flow channel of the evaporator 7 is cooled. The refrigerant in the refrigerant flow channel of the evaporator 7 absorbs heat and evaporates to form refrigerant gas, which is then sucked into the compressor 1 again. Thus, a refrigeration cycle is formed, and the cooling liquid flowing through the cooling liquid flow channel of the evaporator 7 is continuously cooled. The refrigerant used is R134a refrigerant.

[0015] The cooling liquid circulation subsystem is arranged outside the breathable mattress of the medical bed, and comprises a water pump 9, a filter 10, a water tank 13, and the cooling liquid flow channel of the evaporator 7 in the refrigerant circulation subsystem. The water tank 13 stores cooling liquid. The outlet of the water tank 13 is connected to the inlet of the filter 10 through a pipeline, the outlet of the filter 10 is connected to the inlet of the water pump 9 through a pipeline, the outlet of the water pump 9 is connected to one end of the cooling liquid flow channel of the evaporator 7 through a pipeline 8, and the other end of the cooling liquid flow channel of the evaporator 7 is connected to the inlet of the water tank 13 through a pipeline.

[0016] In the cooling liquid circulation subsystem, the water pump 9 extracts cooling liquid from the water tank 13 and delivers the cooling liquid to the cooling liquid flow channel of the evaporator 7 (plate heat exchanger). The cooling liquid exchanges heat with the refrigerant in the evaporator 7, and is cooled by the heat absorption of the refrigerant. The cooling liquid cooled by absorbing heat is finally returned to the water tank 13 from the cooling liquid flow channel of the evaporator 7, and thus a cooling liquid circulation is formed. The hot cooling liquid in the water tank 13 is continuously delivered to the evaporator 7 (plate heat exchanger) to be cooled. The filter 10 is installed at the inlet of the water pump 9, and can filter impurities in the cooling liquid.

[0017] Several cold air units are arranged in the air-permeable mattress of the medical bed. As shown in the drawings, a plurality of cavities are arranged in the air-permeable mattress 26 of the medical bed, and each cavity corresponds to a different position of the human body, such as the back position, the waist position, and the leg position. The surface of the air-permeable mattress 26 is provided with a plurality of groups of through holes corresponding to the position of each cavity region, and the lower end of each through hole is connected to the corresponding cavity region, and the upper end of each through hole is connected to the upper side of the air-permeable mattress 26. Figure 2

[0018] Each cold air unit includes a circulating water pump, a high-pressure fan, a heat exchanger, and a one-way valve. In each cold air unit, the inlet of the circulating water pump is connected to another outlet of the water tank 13 in the cooling liquid circulation subsystem through a pipeline, the outlet of the circulating water pump is connected to one end of the heat exchanger through a pipeline, the other end of the heat exchanger is connected to the inlet of the one-way valve through a pipeline, and the outlet of the one-way valve is connected to another inlet of the water tank 13 through a pipeline.

[0019] As shown in the drawings, in each cold air unit, the circulating water pump is arranged on one side of the bottom of the cavity of the air-permeable mattress 26 of the medical bed, the one-way valve is arranged on the other side of the cavity of the air-permeable mattress of the medical bed, and the heat exchanger and the high-pressure fan are arranged in the cavity of the air-permeable mattress 26, wherein the heat exchanger is located below the high-pressure fan, the windward side of the heat exchanger faces downward to the lower area of the cavity of the air-permeable mattress, the outflow side of the heat exchanger faces the inflow side of the high-pressure fan, and the outflow side of the high-pressure fan faces upward to the lower end of each through hole on the surface of the air-permeable mattress corresponding to the cavity of the air-permeable mattress. Figure 2

[0020] In each cold air unit, the circulating water pump extracts the cooled cooling liquid from the water tank 13 of the cooling liquid circulation subsystem, and the cooling liquid flows through the heat exchanger and the one-way valve in sequence and then returns to the water tank 13 of the cooling liquid circulation subsystem through the circulating water pump. In each cold air unit, the high-pressure fan forms air, and the air exchanges heat with the cooling liquid flowing through the heat exchanger when the air passes through the heat exchanger, thereby cooling the air, and finally the high-pressure fan sends the cooled and dehumidified air to the holes on the surface of the air-permeable mattress 26.

[0021] This embodiment takes three groups of cold air units as an example for illustration, which are the back cold air unit, the waist cold air unit, and the leg cold air unit. The back cold air unit is arranged in the cavity corresponding to the back position of the air-permeable mattress 26, the waist cold air unit is arranged in the cavity corresponding to the waist position of the air-permeable mattress 26, and the leg cold air unit is arranged in the cavity corresponding to the leg position of the air-permeable mattress 26.

[0022] ​​The back cooling fan unit comprises a back circulating water pump 14, a back heat exchanger 16 (copper pipe sleeve fin type), a back high-pressure fan 15, and a back one-way valve 17. The back circulating water pump 14 draws low-temperature coolant from the water tank 13, and the low-temperature coolant flows through the back heat exchanger 16 to exchange heat with the air blown by the back high-pressure fan 15, so as to cool and dehumidify the air. The cool and dry air is blown to the back of the patient through the through holes of the air-permeable mattress 26, so as to dry and cool the skin of the back of the patient. When the air blown by the back high-pressure fan 15 passes through the through holes of the air-permeable mattress, the through holes shrink under the effect of thermal expansion and contraction, so that the wind speed is further increased, and the back of the patient can be blown and massaged.

[0023] The waist cooling fan unit comprises a waist circulating water pump 18, a waist heat exchanger 20 (copper pipe sleeve fin type), a waist high-pressure fan 19, and a waist one-way valve 21. The waist circulating water pump 18 draws low-temperature coolant from the water tank 13, and the low-temperature coolant flows through the waist heat exchanger 20 to exchange heat with the air blown by the waist high-pressure fan 19, so as to cool and dehumidify the air. The cool and dry air is blown to the waist of the patient through the through holes of the air-permeable mattress 26, so as to dry and cool the skin of the waist of the patient. When the air blown by the waist high-pressure fan 19 passes through the through holes of the air-permeable mattress 26, the through holes shrink under the effect of thermal expansion and contraction, so that the wind speed is further increased, and the waist of the patient can be blown and massaged.

[0024] The leg cooling fan unit comprises a leg circulating water pump 22, a leg heat exchanger 24 (copper pipe sleeve fin type), a leg high-pressure fan 23, and a leg one-way valve 25. The leg circulating water pump 22 draws low-temperature coolant from the water tank 13, and the low-temperature coolant flows through the leg heat exchanger 24 to exchange heat with the air blown by the leg high-pressure fan 23, so as to cool and dehumidify the air. The cool and dry air is blown to the legs of the patient through the through holes of the air-permeable mattress 26, so as to dry and cool the skin of the legs of the patient. When the air blown by the leg high-pressure fan 23 passes through the through holes of the air-permeable mattress 26, the through holes shrink under the effect of thermal expansion and contraction, so that the wind speed is further increased, and the legs of the patient can be blown and massaged.

[0025] The air-permeable mattress 26 applied in the embodiment can massage the body of the patient lying on the medical bed when the whole system is working.

[0026] The embodiment further comprises a controller 12 and an auxiliary temperature sensor and a flow switch 11. The flow switch 11 is used to collect the flow of the coolant flowing from the evaporator 7 to the water tank 13 in the coolant circulation subsystem. The temperature sensor is used to collect the temperature of the coolant flowing from the water tank 13 to the water pump 9 in the coolant circulation subsystem. The flow switch 11 and the temperature sensor are respectively electrically connected to the controller 12 for signal transmission. The controller 12 is electrically connected to the compressor 1 in the refrigerant circulation subsystem and the water pump 9 in the coolant circulation subsystem for control.

[0027] The flow switch 11 is installed on the pipeline between the outlet of the evaporator 7 and the inlet of the water tank 13. When the flow switch 11 detects that the flow of the cooling liquid flowing through meets the set threshold, the controller 12 determines that the working condition of the refrigerant circulation subsystem is met, thereby avoiding the damage of the cooling equipment caused by the false working of the refrigerant circulation subsystem when no cooling liquid flows through the evaporator 7.

[0028] The temperature sensor is installed on the outer surface of the water pipe before the water pump 9, and can sense the water temperature at the inlet of the water pump 9. When the temperature sensed by the temperature sensor at the inlet of the water pump 9 is higher than the set threshold, the controller 12 determines that the working condition of the cooling liquid circulation subsystem is met, and controls the refrigerant circulation subsystem and the cooling liquid circulation subsystem to work at the same time when the working condition of the refrigerant circulation subsystem is determined to be met, so as to continuously cool the water in the water tank 13 until the temperature of the water in the water tank 13 is reduced to the temperature set by the controller 12.

[0029] The preferred embodiments of the present application are described in detail above in combination with the drawings, and the examples described in the present application are only used to describe the preferred embodiments of the present application, and do not limit the concept and scope of the present application. In the above specific embodiments, each specific technical feature described above can be combined in any appropriate manner without contradiction, and such combination should also be considered as the disclosure of the present disclosure as long as it does not deviate from the concept of the present application. In order to avoid unnecessary repetition, the present application does not further describe various possible combinations.

[0030] The present application is not limited to the specific details described in the above embodiments, and various modifications and improvements of the technical solutions of the present application made by those skilled in the art within the scope of the technical concept of the present application and without departing from the design concept of the present application should fall within the protection scope of the present application. The technical content of the present application claimed for protection has been fully recorded in the claims.

Claims

1. A medical bed air conditioning system comprising a refrigerant circulating subsystem provided outside a medical bed, a coolant circulating subsystem, and a heat exchanger for exchanging heat between refrigerant in the refrigerant circulating subsystem and coolant in the coolant circulating subsystem to cool the coolant in the coolant circulating subsystem, characterized in that, The cold air unit is arranged in the air-permeable mattress of the medical bed, and comprises a circulating water pump, a fan, a heat exchanger, and a check valve.

2. The medical bed air conditioning system according to claim 1, wherein The refrigerant circulation subsystem comprises a compressor (1), a condenser (3) with a condenser fan (2), a liquid accumulator (4), a filter (5), a thermal expansion valve (6), and an evaporator (7). The evaporator (7) is a plate heat exchanger, which has a refrigerant flow channel and a cooling liquid flow channel. The refrigerant output by the compressor (1) sequentially passes through the condenser (3), the liquid accumulator (4), the filter (5), the thermal expansion valve (6), and the refrigerant flow channel of the evaporator (7), and then returns to the compressor (1), thereby forming a refrigerant circulation.

3. The medical bed air conditioning system according to claim 2, wherein The cooling liquid circulation subsystem comprises a water tank (13), a water pump (9), and the cooling liquid flow channel of the evaporator (7) in the refrigerant circulation subsystem. The water pump (9) delivers the cooling liquid in the water tank (13) to the cooling liquid flow channel of the evaporator (7), and the cooling liquid returns to the water tank (13) after passing through the cooling liquid flow channel of the evaporator (7), thereby forming a cooling liquid circulation. The water tank (13) is also connected to the circulating water pumps in the cold air units, and the circulating water pumps in the cold air units draw the cooling liquid from the water tank (13).

4. The medical bed air conditioning system according to claim 3, wherein The controller (12) and the temperature sensor and the flow switch (11) are also included. The flow switch (11) is used to collect the flow of the cooling liquid flowing from the cooling liquid flow channel of the evaporator (7) to the water tank (13) in the cooling liquid circulation subsystem. The temperature sensor attached to the controller is used to collect the temperature of the cooling liquid flowing from the water tank (13) to the water pump (9) in the cooling liquid circulation subsystem. The flow switch (11) and the temperature sensor are respectively electrically connected to the controller (12) for signal transmission. The controller (12) is electrically connected to the compressor (1) in the refrigerant circulation subsystem.

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