Gas circuit control device

Abstract

A gas circuit control device comprises a gas pump, a gas circuit electromagnetic valve set and a gas pressure sensor, the gas pump is connected with the gas circuit electromagnetic valve set, the gas circuit electromagnetic valve set comprises a three-way normally-closed valve and a two-way normally-open valve, the gas pump is connected with a gas inlet of the three-way normally-closed valve, and the gas pressure sensor is connected with a gas outlet of the two-way normally-open valve. An air inlet and an air outlet of the normally-closed valve 3 are communicated with an inlet and an outlet of equipment to be inflated, are provided with air pressure sensors for continuously detecting internal pressure in real time, are directly communicated with an air outlet of the normally-closed valve 3, and are communicated with the air inlet and the air outlet of the normally-closed valve 3; an air outlet of the normally-closed valve 3 is directly communicated with an air inlet of the normally-open valve 2, and an air outlet of the normally-open valve 2 is communicated with an exhaust port; the normally-closed valve 3, the normally-open valve 2 and the air pressure sensor are all connected with the controller. The utility model provides the gas circuit control device which can increase the inflation and deflation speed and realize pressure measurement and pressure maintaining.

Description

Technical Field

[0001] The utility model belongs to the field of gas path control and relates to a gas path control device. Background Art

[0002] The existing gas circuit control method usually controls the gas circuit shutoff through a solenoid valve, which has the technical defects of slow inflation and deflation speed and inability to measure and maintain pressure.

[0003] The air path control method is applied to airbag massage mattresses or pressure-maintaining mattresses. There are great differences in the control principles and control targets of these two types of mattresses. It is difficult to achieve the dual functions of massage and pressure maintenance with one set of devices. However, users generally have a real demand for dual functions. Users hope that the mattress not only has good comfort, but also can provide excellent massage experience.

[0004] Existing airbag control methods, such as Chinese patent application No. 202310077198.2, disclose an airbag inflation control method, device, storage medium, control device and smart bed, the method including determining the target massage mode and target force level after receiving a massage trigger command, determining the target airbag from multiple airbags according to the target massage mode, determining the target pressure value of the target airbag according to the target force level, and finally controlling the inflation of the target airbag according to the actual pressure value and the target pressure value of the target airbag. In this solution, when the smart bed is inflated, it is necessary to inflate according to the actual pressure value and target pressure value of each airbag, rather than inflating for a fixed time. For example, some airbags with high actual pressure are only inflated for 3 seconds, while other airbags are inflated for 10 seconds, etc., so that the pressure of all airbags finally reaches the target pressure, alleviating the technical problem of different airbag pressures after inflation in the current airbag inflation control technology. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the utility model provides an air circuit control device for increasing the speed of inflation and deflation and realizing pressure measurement and pressure maintenance.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A gas circuit control device comprises an air pump, an air circuit solenoid valve group and an air pressure sensor, wherein the air pump is connected to the gas circuit solenoid valve group, the gas circuit solenoid valve group comprises a 3 normally closed valve and a 2 normally open valve, the air pump is connected to the air inlet of the 3 normally closed valves, the air inlet and outlet of the 3 normally closed valves are connected to the inlet and outlet of a device to be inflated, an air pressure sensor is arranged at the air inlet and outlet of the 3 normally closed valves for real-time and continuous detection of internal pressure, the air inlet and outlet of the 3 normally closed valves are directly connected to the air outlet of the 3 normally closed valves, the air outlet of the 3 normally closed valves is directly connected to the air inlet of the 2 normally open valves, and the outlet of the 2 normally open valves is connected to the exhaust port; the 3 normally closed valves, the 2 normally open valves and the air pressure sensor are all connected to a controller.

[0008] Furthermore, the controller includes a pressure maintaining module, which is used to receive the air pressure value of the air pressure sensor, and send a stop inflation command to the air circuit solenoid valve group if the current air pressure value exceeds the preset pressure upper limit, and send a start inflation command to the air circuit solenoid valve group if the current air pressure value is lower than the preset pressure lower limit. This solution can maintain the pressure of the device to be inflated within the preset pressure range to achieve pressure maintenance.

[0009] Furthermore, when the 3 normally closed valves are powered on, the air inlet is connected to the air inlet and outlet, and when the 3 normally closed valves are powered off, the air inlet and the air inlet and outlet are closed. When the 3 normally closed valves are powered off, the air inlet of the 2 normally open valves is closed to the air outlet of the 2 normally open valves when the 2 normally open valves are powered off, and the pressure is maintained without exhaust. When the 2 normally open valves are powered on, the valves are opened, that is, the air inlet of the 2 normally open valves is connected to the air outlet of the 2 normally open valves, and exhaust is achieved through the exhaust port. This is a preferred control scheme; of course, other control methods can also be used.

[0010] Furthermore, there are two air pumps, which are arranged in parallel, and the inlets of the air pumps are both connected to the air inlet of the air circuit solenoid valve group. This is a preferred solution, which is conducive to improving the inflation speed.

[0011] The device to be inflated is an airbag, which can be implemented in various ways and can be applied to different occasions such as an airbag bed.

[0012] Preferably, the device to be inflated is an array airbag, and the array air circuit solenoid valve group forms an air circuit solenoid valve group, one air circuit solenoid valve group corresponds to one airbag in the array airbag, the inlet and outlet of the three normally closed valves are connected to the inlet and outlet of the airbag, and the inlet and outlet of the three normally closed valves are provided with air pressure sensors for real-time and continuous detection of the internal pressure of the airbag. In this scheme, the array airbag is a preferred scheme, for example, when applied to an airbag bed, the array airbag is set in the mattress to improve comfort, and the array airbag and the array air circuit solenoid valve cooperate to improve the speed of inflation and deflation; of course, other structural forms can also be used.

[0013] More preferably, when the 3 normally closed valves are powered on, the air inlet and the air inlet and outlet are connected, that is, the airbag can be inflated independently, and when the 3 normally closed valves are powered off, the air inlet and the air inlet and outlet are closed; when the 3 normally closed valves are powered off, the 2 normally open valves are powered off without exhausting gas and are in a pressure-maintaining state, and when the 2 normally open valves are powered on, the valves open to exhaust the airbag. This is a preferred control scheme, and other control methods can also be used.

[0014] The technical concept of the utility model is: single air circuit double valve control, through the air circuit connection design, all operating airflow, inflation and deflation processes do not pass through the solenoid valve core channel, effectively utilize the solenoid valve head cavity, the flow rate passing through is not affected by the traditional solenoid valve core channel, thus greatly improving the inflation and deflation speed; auxiliary air pressure sensors are arranged on each air circuit, and each air circuit can independently measure and maintain pressure.

[0015] The beneficial effects of the utility model are mainly manifested in: improving the speed of inflation and deflation, and achieving pressure measurement and pressure maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the gas path control device at an angle.

[0017] Figure 2 This is a schematic diagram of the gas path control device from another angle.

[0018] Figure 3 6 is an air circuit diagram of the air circuit solenoid valve group in the inflation and pressure-maintaining state, wherein the arrow direction is the air flow direction, 6 is the air inlet of the 3 normally closed valve 201, and 7 is the air outlet of the 2 normally open valve 202.

[0019] Figure 4 Schematic diagram of the exhaust state of the gas circuit solenoid valve group, wherein the direction of the arrow is the direction of the air flow, 6 is the air inlet of the 3 normally closed valve 201, and 7 is the air outlet of the 2 normally open valve 202. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] Reference Figure 1 to Figure 4, an air circuit control device, comprising an air pump 1, an air circuit solenoid valve group 2 and an air pressure sensor 3, wherein the air pump 1 is connected to the air circuit solenoid valve group, the air circuit solenoid valve group comprises a 3 normally closed valve 201 and a 2 normally open valve 202, the air pump 1 is connected to the air inlet 6 of the 3 normally closed valve 201, the air inlet and outlet of the 3 normally closed valve 201 are connected to the inlet and outlet of the to-be-inflated equipment 5, an air pressure sensor 3 is arranged at the air inlet and outlet of the 3 normally closed valve 201, for real-time and continuous detection of the internal pressure of the to-be-inflated equipment 5, the air inlet and outlet of the 3 normally closed valve 201 are directly connected to the air outlet of the 3 normally closed valve 201, the air outlet of the 3 normally closed valve 201 is directly connected to the air inlet of the 2 normally open valve 202, and the air outlet 7 of the 2 normally open valve 202 is connected to the exhaust port; the 3 normally closed valve 201, the 2 normally open valve 202 and the air pressure sensor 3 are all connected to the controller 4.

[0022] Furthermore, the controller includes a pressure maintaining module, which is used to receive the air pressure value of the air pressure sensor, and send a stop inflation command to the air circuit solenoid valve group if the current air pressure value exceeds the preset pressure upper limit, and send a start inflation command to the air circuit solenoid valve group if the current air pressure value is lower than the preset pressure lower limit. This solution can maintain the pressure of the device 5 to be inflated within the preset pressure range to achieve pressure maintenance.

[0023] Furthermore, when the 3 normally closed valves are powered on, the air inlet is connected to the air inlet and outlet, and when the 3 normally closed valves are powered off, the air inlet and the air inlet and outlet are disconnected. When the 3 normally closed valves are powered off, the air inlet of the 2 normally open valves is disconnected from the air outlet of the 2 normally open valves, and the pressure is maintained without exhaust. When the 2 normally open valves are powered on, the valves are opened, that is, the air inlet of the 2 normally open valves is connected to the air outlet of the 2 normally open valves, and exhaust is achieved through the exhaust port. This is a preferred control scheme, and other control methods can also be used.

[0024] Furthermore, there are two air pumps, which are arranged in parallel, and the inlets of the air pumps are both connected to the air inlet of the air circuit solenoid valve group.

[0025] The device to be inflated 5 is an airbag. The airbag here can be implemented in various different ways, and the airbag can be applied to different occasions such as an airbag bed.

[0026] Preferably, the inflatable device 5 is an array airbag, and the array air circuit solenoid valve group forms an air circuit solenoid valve group, one air circuit solenoid valve group corresponds to one airbag in the array airbag, the inlet and outlet of the 3 normally closed valves are connected to the inlet and outlet of the airbag, and the inlet and outlet of the 3 normally closed valves are provided with air pressure sensors for real-time and continuous detection of the internal pressure of the airbag. In this scheme, the array airbag is a preferred scheme, for example, when applied to an airbag bed, the array airbag is set in the mattress to improve comfort, and the array airbag and the array air circuit solenoid valve cooperate to improve the speed of inflation and deflation; of course, other structural forms can also be used.

[0027] The air circuit control device of this embodiment is applied to an airbag bed, including a bed body and a mattress. The mattress includes an array airbag (the airbag, i.e., the device to be inflated 5), an air pump 1, an air circuit solenoid valve group 2 and an air pressure sensor 3. The array air circuit solenoid valve group forms an integrated air circuit solenoid valve group. One air circuit solenoid valve group corresponds to one airbag in the array airbag. The air inlet and outlet of the 3 normally closed valves are connected to the inlet and outlet of the airbag. Air pressure sensors are arranged at the air inlet and outlet of the 3 normally closed valves for real-time and continuous detection of the internal pressure of the airbag.

[0028] More preferably, when the 3 normally closed valves are powered on, the air inlet and the air inlet and outlet are connected, that is, the airbag can be inflated independently, and when the 3 normally closed valves are powered off, the air inlet and the air inlet and outlet are closed; when the 3 normally closed valves are powered off, the 2 normally open valves are powered off without exhausting gas and are in a pressure-maintaining state, and when the 2 normally open valves are powered on, the valves open to exhaust the airbag. This is a preferred control scheme, and other control methods can also be used.

[0029] There are two air pumps, which are arranged in parallel, and the inlets of the air pumps are both connected to the air inlet of the air circuit solenoid valve group.

[0030] The bed body and the mattress are separate. Alternatively, the bed body and the mattress are integrated. The separate or integrated structure can be selected according to needs.

[0031] In the scheme of this embodiment, an air pressure sensor is connected to the mouth of the air circuit solenoid valve group leading to each airbag, which can continuously detect the internal pressure of each airbag in real time, providing a basis for precise regulation; the solenoid valve group is integratedly designed to form the air circuit solenoid valve group, and double valve control is adopted for each airbag. The front valve is a 3-normally closed valve connected to the air pump. When the power is on, the valve opens to inflate the airbag independently, and when the power is off, the airbag is connected to the rear valve; the rear valve is a 2-normally open valve connected to the airbag through the front valve. When the power is off, the rear valve does not exhaust and is in a pressure maintaining state. When the power is on, the rear valve opens to exhaust the airbag; through the above design, independent pressure measurement, independent inflation, independent deflation and independent pressure maintenance of each airbag can be achieved.

[0032] When a human body lies flat or on its side on a bed surface with an array-distributed airbag, if the human body needs to get the best comfort, assist in sleeping, etc., then the pressure value of the bed surface in contact with the human body must be equal. Therefore, an array-distributed airbag is designed for the bed surface. The airbags are inflated and deflated to maintain different hardness and softness to fit various parts of the human body, so that the height, hardness and softness of the bed surface can adapt to various postures of the human body. Secondly, as a functional physiotherapy bed, when the human body lies flat or on its side on the bed surface, the bed surface inflates and deflates the array-distributed airbags at a high speed, thereby squeezing the contact surface between the human body and the bed surface, thereby achieving a massage therapy effect.

[0033] The solution of this embodiment is not only applicable to airbag beds, but also suitable for other airbag controlled occasions such as airbag sofas and airbag chairs.

[0034] The contents described in the embodiments of this specification are merely enumerations of implementation forms of the utility model concept and are for illustrative purposes only. The protection scope of the utility model should not be considered to be limited to the specific forms described in this embodiment, and the protection scope of the utility model also extends to equivalent technical means that ordinary technicians in this field can think of based on the concept of the utility model.

Claims

1. A gas path control device, characterized in that: The device includes an air pump, an air circuit electromagnetic valve group and an air pressure sensor. The air pump is connected to the air circuit electromagnetic valve group. The air circuit electromagnetic valve group includes a 3-normally closed valve and a 2-normally open valve. The air pump is connected to the air inlet of the 3-normally closed valve. The air inlet and outlet of the 3-normally closed valve are connected to the inlet and outlet of the equipment to be inflated. Air pressure sensors are arranged at the air inlet and outlet of the 3-normally closed valve for real-time and continuous detection of internal pressure. The air inlet and outlet of the 3-normally closed valve are directly connected to the air outlet of the 3-normally closed valve, the air outlet of the 3-normally closed valve is directly connected to the air inlet of the 2-normally open valve, and the air outlet of the 2-normally open valve is connected to the exhaust port; the 3-normally closed valve, the 2-normally open valve and the air pressure sensor are all connected to a controller.

2. The gas path control device according to claim 1, characterized in that: The controller includes a pressure maintaining module for receiving the air pressure value of the air pressure sensor. If the current air pressure value exceeds the preset upper pressure limit, a stop inflation command is issued to the air circuit solenoid valve group; if the current air pressure value is lower than the preset lower pressure limit, a start inflation command is issued to the air circuit solenoid valve group.

3. The gas path control device according to claim 1 or 2, characterized in that: When the 3 normally closed valves are energized, the air inlet is connected to the air inlet and the air outlet; when the 3 normally closed valves are de-energized, the air inlet and the air inlet and the air outlet are closed; when the 3 normally closed valves are de-energized, the air inlet of the 2 normally open valves and the air outlet of the 2 normally open valves are closed when the 2 normally open valves are de-energized, and are in a non-exhaust pressure maintaining state; when the 2 normally open valves are energized, the valves are open, that is, the air inlet of the 2 normally open valves is connected to the air outlet of the 2 normally open valves, and exhaust is achieved through the exhaust port.

4. The gas path control device according to claim 1 or 2, characterized in that: There are two air pumps, which are arranged in parallel, and the inlets of the air pumps are both connected to the air inlet of the air circuit solenoid valve group.

5. The gas path control device according to claim 1 or 2, characterized in that: The device to be inflated is an airbag.

6. The gas path control device according to claim 5, characterized in that: The device to be inflated is an array airbag, and the array air circuit solenoid valve group forms an integrated air circuit solenoid valve group, one air circuit solenoid valve group corresponds to one airbag in the array airbag, the air inlet and outlet of the three normally closed valves are connected to the inlet and outlet of the airbag, and the air inlet and outlet of the three normally closed valves are provided with air pressure sensors for real-time and continuous detection of the internal pressure of the airbag.

7. The gas path control device according to claim 6, characterized in that: When the 3 normally closed valves are energized, the air inlet and the air inlet and the air outlet are connected, that is, the airbag can be inflated independently. When the 3 normally closed valves are de-energized, the air inlet and the air inlet and the air outlet are closed. When the 3 normally closed valves are de-energized, the 2 normally open valves are not exhausted and are in a pressure maintaining state when the power is off. When the 2 normally open valves are energized, the valves open to exhaust the airbag.

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