Control structure for preventing water return of blanket body

Abstract

The utility model discloses a blanket body backwater prevention control structure which comprises a machine shell and double water tanks, the independent double water tanks are installed in the machine shell, and the double water tanks comprise an upper water tank used for storing water and supplementing water and a lower water tank located below the upper water tank and used for conducting water circulation with a blanket body. A control structure for preventing the blanket body from returning water is arranged between the upper water tank and the lower water tank. According to the utility model, the water tank design is adopted, cold and hot circulation is only carried out in the lower water tank, and the upper water tank is only used for supplementing water to the lower water tank and the blanket body; hot water is not in direct contact with a user, and scalding is avoided; the lower water tank where the evaporator is located can be as small as possible, and heating and cooling water amount is reduced to reduce power consumption and initial heating and cooling time; a control structure for preventing the blanket body from returning water is arranged between the upper water tank and the lower water tank, so that the blanket body is prevented from expanding and shrinking under the influence of pressure of the pump set after the host is shut down, and water is prevented from flowing back to the water tanks from the return water circulating pipe set and overflowing.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature control equipment, in particular to a control structure for preventing the blanket body from returning water. Background Technique

[0002] The water heating blanket, also known as the hydrothermal blanket, is a new generation of water circulation heating electric blanket and an upgraded product of the ordinary electric blanket. Its advantages are safety, and it has a certain promoting effect on improving sleep quality and eliminating fatigue. It is an improved product based on the various drawbacks and insecurity of the electric blanket, and uses the principle of water and electricity isolation to achieve many advantages such as safety, constant temperature, no electromagnetic radiation, and no induced voltage.

[0003] In the existing related technologies, the host makes the water in the blanket body circulate hot and cold. Generally, there are two technical directions for the water blanket. One is that (PVC or TPU) pipes are arranged in an S shape on the blanket body. This method has a lower cost, the expansion coefficient of the pipes is small, and the water volume can be well inhibited, but it is difficult to conduct heat evenly and the material is relatively hard, resulting in a poor tactile sensation. The other is the high-frequency pressing blanket body. The width and uniformity of the water path of this process can be well controlled. The blanket body fabric is relatively thin and has a good tactile sensation. It is formed by pressing two pieces of fabric with a mold. The disadvantage is that because the blanket body using the high-frequency pressing process has a uniform water distribution, but the material has a stretching coefficient, and the water path will have a slight expansion under the influence of the water pump pressure. And in some product usage scenarios, the host is placed horizontally below the blanket body. Within a few minutes after shutdown, the blanket body loses the acting force of the water pump, and due to gravity and material contraction, the water in the blanket body will also flow towards the host water tank, resulting in water overflowing from the water injection port. Content of the Utility Model

[0004] The purpose of the utility model is to provide a control structure for preventing the blanket body from returning water, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A control structure for preventing the blanket body from returning water is applied to a warm and cold blanket with a cold and hot constant temperature control device. The warm and cold blanket with a cold and hot constant temperature control device includes:

[0007] A machine shell, in which an independent double water tank and a pump group are installed. The double water tank includes an upper water tank for storing and replenishing water and a lower water tank located below the upper water tank and used for water circulation with the blanket body;

[0008] A refrigeration and heating device, the refrigeration and heating device includes a heating component and a heat exchange component. The heating component includes a plurality of PTC heating modules located at the lower end of the lower water tank, and the heat exchange component includes an evaporator placed in the lower water tank;

[0009] The heat exchange component exchanges heat between the gaseous refrigerant and the water in the lower water tank via the evaporator to reduce the water temperature to produce cold water.

[0010] The small cycle formed by the pump group and the PTC forms multiple independent temperature zones for independently compensating heat for the cold water, so as to accurately control the temperature for users with different heating and cooling requirements. The temperature zones are correspondingly connected to the blanket temperature zones of the blanket body. The cold water enters the blanket temperature zones after passing through the temperature zones.

[0011] A structure for preventing the blanket body from returning water is provided between the upper water tank and the lower water tank.

[0012] An exhaust structure is provided between the upper water tank and the lower water tank.

[0013] Furthermore, the multiple PTC heating modules at least include PTC heating module I and PTC heating module II. The lower water tank is connected to the pump group located inside the casing. The pump group at least includes pump I and pump II. Pump I and pump II are respectively connected to PTC heating module I and PTC heating module II through water delivery pipe I and water delivery pipe II.

[0014] PTC heating module I and PTC heating module II are respectively connected to the water outlet pipe group. The water outlet pipe group is connected to the blanket body. The blanket body is connected to the respective temperature zones in the lower water tank through the return water circulation pipe group.

[0015] Furthermore, the water outlet pipe group includes inner water outlet pipe I, inner water outlet pipe II, outer water outlet pipe I, and outer water outlet pipe II. The return water circulation pipe group includes inner circulation pipe I, inner circulation pipe II, outer circulation pipe I, and outer circulation pipe II.

[0016] One ends of inner water outlet pipe I and inner water outlet pipe II are respectively connected to PTC heating module I and PTC heating module II, and the other ends are connected to the pipe joints installed on the casing.

[0017] One ends of outer water outlet pipe I and outer water outlet pipe II are connected to the pipe joints, and the other ends are connected to the blanket body.

[0018] One ends of inner circulation pipe I and inner circulation pipe II are connected to the lower water tank, and the other ends are connected to the pipe joints.

[0019] One ends of outer circulation pipe I and outer circulation pipe II are connected to the pipe joints, and the other ends are connected to the blanket body.

[0020] Furthermore, the structure for preventing the blanket body from returning water includes pump III and a water delivery pipe. Pump III is connected to the upper water tank. One end of the water delivery pipe is connected to pump III, and the other end is connected to the lower water tank. A one-way valve is provided on the water delivery pipe.

[0021] Further, the exhaust structure includes an exhaust pipe I and a normally closed solenoid valve located on the exhaust pipe I. One end of the exhaust pipe I is connected to the upper water tank, and the other end is connected to the lower water tank.

[0022] Further, the heat exchange assembly further includes a compressor, a condenser, a filter, and a gas-liquid separator disposed within the housing. The compressor and the condenser are connected by an exhaust pipe II. One end of the filter is connected to the condenser, and the other end is connected to the evaporator through a throttling device. One end of the gas-liquid separator is connected to the compressor, and the other end is connected to the evaporator through a liquid return pipe.

[0023] Further, a heat dissipation assembly for dissipating heat from the device is installed within the housing. A support box for sound insulation surrounds the lower water tank. The support box is disposed on the condenser, and the bottom of the support box has a diversion hole. The heat dissipation assembly is close to the condenser.

[0024] Further, the number of temperature zones of the blanket is the same as the number of zones. The temperature zones of the blanket at least include temperature zone I and temperature zone II. An interface I and an interface II are respectively installed in temperature zone I and temperature zone II. The interface I is connected to the outlet water outer pipe I and the circulation outer pipe I. The interface II is connected to the outlet water outer pipe II and the circulation outer pipe II.

[0025] Further, the upper and lower sides of the evaporator are tightly abutted against the partition I on the upper and lower inner walls of the lower water tank. The middle of the evaporator has a partition II for support.

[0026] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0027] In the present utility model, with the design of the water tank, the cold and hot circulation only occurs in the lower water tank, and the upper water tank is only used to supply water to the lower water tank and the blanket; this prevents hot water from directly contacting the user and avoids scalding; the lower water tank where the evaporator is located can be made as small as possible, reducing the amount of water for heating and cooling to reduce power consumption and the initial heating and cooling time; there is a control structure for preventing the blanket from returning water between the upper water tank and the lower water tank, avoiding the blanket from expanding and contracting under the influence of the pump group pressure after the main engine is shut down, and preventing water from surging back into the water tank through the return water circulation pipe group, resulting in overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present utility model.

[0029] Figure 2 is a schematic diagram of the present utility model with a part of the housing removed.

[0030] Figure 3 is the present utility model Figure 2 from another perspective.

[0031] Figure 4 is the present utility model Figure 2Schematic diagram after removing the support box.

[0032] Figure 5 For the present utility model Figure 4 Schematic diagram after removing the lower water tank.

[0033] Figure 6 Schematic diagram of installing spacer II on the evaporator of the present utility model.

[0034] Figure 7 For the present utility model Figure 2 Schematic diagram after removing the heat dissipation component and part of the condenser.

[0035] Figure 8 For the present utility model Figure 2 Cross-sectional view at A-A of the present utility model.

[0036] Figure 9 Schematic diagram of the internal structure of the blanket body of the present utility model.

[0037] In the figure: 1 - machine shell, 2 - double water tank, 3 - upper water tank, 4 - lower water tank, 5 - blanket body backwater prevention control structure, 6 - pump III, 7 - check valve, 8 - water supply pipe, 9 - exhaust structure, 10 - exhaust pipe I, 11 - normally closed solenoid valve, 12 - support box, 13 - diversion hole, 14 - spacer I, 15 - PTC heating module I, 16 - evaporator, 17 - pump I, 18 - pump II, 19 - PTC heating module II, 20 - water delivery pipe I, 21 - water delivery pipe II, 22 - inner water outlet pipe I, 23 - inner water outlet pipe II, 24 - outer water outlet pipe I, 25 - outer water pipe II, 26 - circulating outer pipe I, 27 - circulating outer pipe II, 28 - circulating inner pipe I, 29 - circulating inner pipe II, 30 - heat exchange component, 31 - compressor, 32 - exhaust pipe II, 33 - condenser, 34 - filter, 35 - throttling device, 36 - liquid return pipe, 37 - gas-liquid separator, 38 - heat dissipation component, 39 - blanket body, 40 - upper layer, 41 - bottom layer, 42 - middle layer, 43 - interface I, 44 - interface II, 45 - elastic binding band, 46 - control board, 47 - temperature zone II, 48 - concave handle, 49 - heat dissipation grid, 50 - power cord, 51 - heating component, 52 - pipe joint, 53 - temperature zone I, 54 - water filling port cover, 55 - heat dissipation copper pipe, 56 - spacer II, 57 - anti-slip pad, 58 - silicone rubber ring, 59 - sponge layer. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0039] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper end", "lower end", "inside", "outside", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "sheathed with", "socketed", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] Please refer to Figures 1 to 9 , the present utility model provides a technical solution:

[0042] A heating and cooling blanket with a heating and cooling constant temperature control device, comprising:

[0043] A housing 1, in which an independent double water tank 2 is installed. The double water tank 2 includes an upper water tank 3 for storing and replenishing water and a lower water tank 4 located below the upper water tank 3 for replenishing water to the blanket body 39;

[0044] A refrigeration and heating device, the refrigeration and heating device includes a heating component 51 and a heat exchange component 30. The heating component 51 includes a plurality of PTC heating modules located at the lower end of the lower water tank 4. In this embodiment, taking two PTC heating modules as an example for illustration, they are PTC heating module I 15 and PTC heating module II 19 respectively. The heat exchange component 30 includes an evaporator 16 placed in the lower water tank 4;

[0045] The heat exchange component 30 exchanges heat with the water in the lower water tank 4 through the evaporator 16 to reduce the water temperature to form cold water;

[0046] The cold water is independently compensated for heating through PTC heating module I 15 and PTC heating module II 19 respectively to form two independent temperature zones, and then is correspondingly connected to the blanket temperature zones of the blanket body 39.

[0047] Specifically, the lower water tank 4 is communicated with the pump set located in the machine case 1. The number of pump sets is the same as that of PTC heating modules. The pump set at least includes pump I 17 and pump II 18. The pump I 17 and pump II 18 are respectively connected to the PTC heating module I 15 and PTC heating module II 19 through a water delivery pipe I 20 and a water delivery pipe II 21;

[0048] The PTC heating module I 15 and the PTC heating module II 19 are respectively connected to a water outlet pipe group. The water outlet pipe group is connected to the blanket body 39. The blanket body 39 is connected to the lower water tank 4 through a water circulation return pipe group.

[0049] Specifically, as Figure 3 shown, the water outlet pipe group includes a water outlet inner pipe I 22, a water outlet inner pipe II 23, a water outlet outer pipe I 24, and a water outlet outer pipe II 25. The water circulation return pipe group includes a circulation inner pipe I 28, a circulation inner pipe II 29, a circulation outer pipe I 26, and a circulation outer pipe II 27;

[0050] One ends of the water outlet inner pipe I 22 and the water outlet inner pipe II 23 are respectively connected to the PTC heating module I 15 and the PTC heating module II 19, and the other ends are connected to a pipe joint 52 installed on the machine case 1;

[0051] One ends of the water outlet outer pipe I 24 and the water outlet outer pipe II 25 are connected to the pipe joint 52, and the other ends are connected to the blanket body 39;

[0052] One ends of the circulation inner pipe I 28 and the circulation inner pipe II 29 are connected to the lower water tank 4, and the other ends are connected to the pipe joint 52;

[0053] One ends of the circulation outer pipe I 26 and the circulation outer pipe II 27 are connected to the pipe joint 52, and the other ends are connected to the blanket body 39.

[0054] The blanket body 39 has non - communicating temperature zones. The number of temperature zones is the same as that of the PTC heating modules or pump sets. The temperature zones at least include a temperature zone I 53 and a temperature zone II 47. The temperature zone I 53 and the temperature zone II 47 are respectively installed with an interface I 43 and an interface II 44. The interface I 43 is connected to the water outlet outer pipe I 24 and the circulation outer pipe I 26, and the interface II 44 is connected to the water outlet outer pipe II 25 and the circulation outer pipe II 27.

[0055] In the present utility model, the heating is achieved through the pump set. In this embodiment: the pump I 17 and the pump II 18 divert the normal - temperature water in the lower water tank 4 into the PTC heating module I 15 and the PTC heating module II 19 to play a heating role, and then enter the blanket body 39 through the water pipe group and return to the lower water tank 4 through the water circulation return pipe group for circulating heat exchange.

[0056] Specifically, taking the example that pump I 17 diverts the normal temperature water in the lower water tank 4 to the PTC heating module I 15, then sends it into the temperature zone of the blanket body 39, and then circulates back into the lower water tank 4, the circulation process of pump II 18 will not be elaborated further:

[0057] When pump I 17 diverts water through the water delivery pipe I 20 to the PTC heating module I 15 for heating, and then sends the water outlet inner pipe I 22 to the pipe joint 52. The pipe joint 52 has a sufficient number of independent joint ports. The water outlet outer pipe I 24 is connected to the pipe joint 52. In this way, the heated water is sent into the temperature zone I 53 through the water outlet outer pipe I 24, and then sent into the circulation inner pipe I 28 connected to the pipe joint 52 through the ring outer pipe I 26, and finally re-diverted into the lower water tank 4.

[0058] In the present utility model, multiple small water circuits formed by PTC heating modules and pumps form multiple independent temperature zones.

[0059] In the present utility model, there is a control structure 5 for preventing the blanket body 39 from returning water between the upper water tank 3 and the lower water tank 4; there is an exhaust structure 9 between the upper water tank 3 and the lower water tank 4.

[0060] Specifically, the control structure 5 for preventing the blanket body 39 from returning water includes a pump III 6 and a water delivery pipe 8. The pump III 6 is communicated with the upper water tank 3. One end of the water delivery pipe 8 is connected to the pump III 6, and the other end is connected to the lower water tank 4. A one-way valve 7 is provided on the water delivery pipe 8.

[0061] Specifically, the exhaust structure 9 includes an exhaust pipe I 10 and a normally closed solenoid valve 11 located on the exhaust pipe I 10. One end of the exhaust pipe I 10 is connected to the upper water tank 3, and the other end is connected to the lower water tank 4.

[0062] With the design of the double water tank 2, the cold and hot circulation only takes place in the lower water tank 4, and the upper water tank 3 is only used to supply water to the lower water tank 4 and the blanket body 39. The advantages of doing so are as follows:

[0063] 1. The hot water does not come into direct contact with the user, avoiding scalding;

[0064] 2. The heat exchange water tank where the evaporator 16 is located (i.e., the aforementioned lower water tank 4) can be made as small as possible, reducing the amount of heating and cooling water to reduce power consumption and the initial temperature rise and fall time;

[0065] 3. For the two water tanks: there is a control structure for preventing the blanket from returning water between the upper water tank 3 and the lower water tank 4, avoiding the blanket body 39 from expanding and contracting under the pressure of the pump group (i.e., the aforementioned pump I 17 and pump II 18) after the main machine is shut down, and the water will rush back into the water tank from the return water circulation pipe group, resulting in overflow.

[0066] There are generally two technical directions for the water blanket 39. One is that the (PVC or TPU) tube is arranged in an S shape on the blanket body 39. This method has a lower cost, the expansion coefficient of the tube is small, and the water volume can be well suppressed. However, it is difficult to conduct heat evenly and the material is relatively hard, resulting in a poor sense of touch. The other is the high-frequency welded blanket body. The width and uniformity of the water channels in this process can be well controlled. The fabric of the blanket body is relatively thin and has a good sense of touch. It is formed by pressing two pieces of fabric with a mold. The disadvantage is that because the blanket body uses the high-frequency welding process, the water distribution on the blanket body is uniform, but the material has a stretching coefficient. Affected by the pump pressure, the water channels will expand slightly. And in some product usage scenarios, the main unit is placed horizontally below the blanket body. Within a few minutes after shutdown, the blanket body loses the acting force of the water pump. Affected by gravity and material shrinkage, the water in the blanket body will also flow towards the main unit water tank, resulting in water overflowing from the water injection port.

[0067] To solve the problem that the high-frequency welded blanket body is prone to water overflow from the water injection port within a few minutes after shutdown. When the blanket body loses the acting force of the water pump, affected by gravity and material shrinkage, the water in the blanket body will also flow towards the main unit water tank. The present utility model is as Figure 2 shown. It is designed with upper and lower double water tanks 2. The upper water tank 3 is used for storing and replenishing water. The lower water tank 4 is internally provided with an evaporator 16. The evaporator 16 is in the shape of a serpentine coil or a spiral structure. The cold and heat circulation both takes place in the lower water tank 4. The pump group pumps the cold / hot water in the lower water tank 4 to the blanket body 39, and the blanket body 39 returns to the lower water tank 4 through the return water circulation pipe group. The upper water tank 3 and the lower water tank 4 are connected by two pipelines. One is the water supply pipe 8. There is a one-way valve 7 on the water supply pipe 8, and the water supply pipe 8 is connected to a pump III 6. This pipeline can only transport water from the pump III 6 to the lower water tank 4 and cannot be reversed. The other is the exhaust pipe I 10, which is connected with a normally closed solenoid valve 11 in the middle and is controlled by software. The solenoid valve only opens when the pump III 6 is turned on. Water flows from the upper water tank 3 to the lower water tank 4. Since the lower water tank 4 is a sealed body, air needs to be discharged so that water can enter. Controlled by software, in the heating mode, the pipelines (return water circulation pipe group) of the blanket body 39 and the lower water tank 4 expand due to heat. At this time, the solenoid valve needs to be opened regularly for a few seconds to exhaust and decompress the lower water tank 4 to prevent excessive pressure in the blanket body 39 and the lower water tank 4 from causing water leakage.

[0068] As Figure 3 shown, two copper tubes are led out from the evaporator 16, slightly penetrating outside the lower water tank 4, and tightly sealed by two silicone rubber rings 58 to achieve sealing with the lower water tank 4. The two led-out copper tubes are used for welding with a throttling device 35 (the throttling device is preferably a capillary tube) and a liquid return pipe 26.

[0069] Specifically, the heat exchange assembly 30 further includes a compressor 31, a condenser 33, a filter 34, and a gas-liquid separator 37 disposed in the housing 1. The compressor 31 and the condenser 33 are connected by an exhaust pipe II 32. One end of the filter 34 is connected to the condenser 33, and the other end is connected to the evaporator 16 through a throttling device 35. One end of the gas-liquid separator 37 is connected to the compressor 31, and the other end is connected to the evaporator 16 through a liquid return pipe 36.

[0070] In the present utility model, a compressor 31 is disposed in the housing 1. With the compression refrigeration technology and in cooperation with the blanket body 39, a heating and cooling blanket product that can refrigerate and heat is achieved.

[0071] Specifically, a heat dissipation assembly 38 for dissipating heat from the device is installed in the housing 1. A support box 12 for sound insulation is disposed outside the lower water tank 4. The support box 12 is placed on the condenser 33, and the bottom of the support box 12 has a diversion hole 13. The heat dissipation assembly 38 is close to the condenser 33.

[0072] Specifically, the upper and lower sides of the evaporator 16 are tightly abutted against the partition (foamed silica gel) sheet I 14 on the upper and lower inner walls of the lower water tank 4, and the middle of the evaporator 16 has a partition (foamed silica gel) sheet II 56 as a support.

[0073] The support box 12 is made of a foam member and has the following functions:

[0074] Support the lower water tank 4 and improve the supportability;

[0075] Keep the lower water tank 4 warm;

[0076] Sound insulation for the pump group (pump I 17 and pump II 18), which has a significant effect in the heating mode;

[0077] Collect the condensed water generated by the water collecting tank (lower water tank 4).

[0078] Fix the evaporator in the lower water tank 4 by sandwiching it with two partition sheets I 14.

[0079] Divert the condensed water to the lower condenser 33 through several diversion holes 13 at the bottom of the foam member for auxiliary cooling and consumption.

[0080] Such as Figure 4 、 Figure 5 and Figure 7As shown, the heat dissipation component 38 preferentially uses fan cooling. The condenser 33 is close to the fan, and a part of the bottom of the support box 12 is placed on the fan, and a part is placed on the condenser 33, and the diversion holes 13 are aligned with the condenser 33. As is known from the prior art, the condenser 33 uses multiple layers of heat sinks stacked layer by layer, and then the heat dissipation copper tubes 55 penetrate through the stacked heat sinks. Therefore, when the condensed water drips through the diversion holes 13 and flows down along the heat sinks (a small amount drips on the copper tubes), it is used to dissipate heat from the condenser 33, which not only consumes the condensed water but also prevents excessive accumulation from overflowing from the support box 12. A spacer II 56 is placed in the middle of the evaporator 16, which can not only serve as a support to improve the support for the evaporator 16 but also avoid the vibration of the evaporator 16 during refrigeration and heating, thus ensuring more stable operation.

[0081] The present utility model has a unique dual-zone temperature control technology for refrigeration: Since the variable of the refrigeration system is 1 and the evaporator 16 is also one, how to divide a lower water tank 4 into multiple temperature zones (or temperature regions). In this embodiment, there are two temperature zones, that is, two temperature zones corresponding to the PTC heating module I 15 (or pump I 17) and the PTC heating module II 19 (or pump II 18), which are two blanket temperature zones of the blanket 39: The temperature zone I 53 and the temperature zone II 47 are connected correspondingly to perform refrigeration temperature control. Our method is to use the spacer II 56 to partition two regions in the coil first: As Figure 6 shown, that is, the region on the left side of the spacer II 56 is correspondingly connected to the pump I 17 in the pump group, and the region on the right side of the spacer II 56 is correspondingly connected to the pump II 18 in the pump group. This is how the two regions are partitioned. If the number of pump groups (and PTC heating modules) increases correspondingly, the number of temperature zones will also increase correspondingly.

[0082] Of course, it should be noted that the spacer II 56 is not necessarily present. The number of temperature zones is determined by the specific number of PTC heating modules (and pump groups), that is, there are as many independent PTC heating modules (and pumps). Each pump is connected to the lower water tank 4, resulting in each pump being non-communicating with each other. In this way, each PTC heating module (and pump) will correspond to a certain number of temperature zones, and then the water in the lower water tank 4 will be pumped to the respective corresponding PTC heating modules for heating and then sent to the corresponding blanket temperature zones on the blanket 39.

[0083] The evaporator 16 is installed in the water tank. Due to the pump group and the PTC heating module, it is naturally divided into multiple (two) independent temperature zones. Then, through software calculation to control the speed adjustment of the pump group and the heating compensation of the PTC heating module, the temperatures of the two blanket temperature zones of the blanket 39 are controlled to be the same as the temperatures set by the user.

[0084] The heat exchange component 30, as a refrigeration system, has the following working sequence:

[0085] The exhaust pipe II 32, the high-temperature and high-pressure gaseous refrigerant output from the compressor 31 enters the condenser 33 through the exhaust pipe II 32 and comes out in a low-temperature and high-pressure state. After passing through the filter 34, it reaches the throttling device 35 (capillary tube). The refrigerant passing through the capillary tube becomes in a low-temperature and low-pressure state and comes to the evaporator 16 to exchange heat with the liquid in the lower water tank 4, thereby achieving refrigeration. After coming out, it reaches the liquid return pipe 36 and then enters the gas-liquid separator 37 inside the compressor 31. Thus, it is a cycle process.

[0086] As Figure 1 and Figure 9 shown, the blanket body 39 is used on the bed. The blanket body 39 includes an upper layer 40, a bottom layer 41, and an intermediate layer 42. The upper layer 40 is made of Lyocell fabric laminated with a TPU film. The bottom layer 41 is a polyester pongee fabric laminated with a PU-coated cloth and drip-molded with transparent silica gel for anti-slip. There are also elastic straps 45 at the four corners of the bottom to help the blanket body 39 better fix to the corners of the mattress. The intermediate layer 42 is a water channel layer. The periphery of the blanket body 39 is tightly sewn and fixed with a binding cloth.

[0087] The water channel layer is composed of two pieces of peach skin fleece with brushed surfaces welded together by a high-frequency welding process to form two pieces of fabric and form water channels. The interface I 43 and interface II 44 of the water channel layer serve as inlets and outlets and are designed with water nozzle ports. The water nozzle ports are sandwiched between two layers of PVC and welded and sealed. The water nozzle ports are respectively connected to the water outlet pipe group and the return water circulation pipe group.

[0088] There is a sponge layer 59 between the bottom layer 41 and the intermediate layer 42. The sponge thickness is 2 cm for temperature insulation, which can increase the body feeling comfort and prevent the cold air from spreading downward. The peach skin fleece with brushed surface has higher softness.

[0089] In the refrigeration mode, if the air humidity is high and the temperature difference between the environment and the blanket body 39 is large, condensed water is very likely to be generated on the surface of the water channel layer of the blanket body. To solve this problem, we design to completely isolate the water channel layer from the external air of the blanket body 39. Therefore, the upper and lower surface fabrics of the blanket body need to be laminated with TPU and PU films to isolate water vapor, keep the water channel layer dry, reduce the phenomenon of the blanket body getting moldy and stinking, and the user experience is better.

[0090] There is also a pure PVC welding solution on the market. This material will soften when heated. When the water channel bears the pressure from the main pump of the host, the water channel of the blanket body will expand, and there will be the following problems. The PVC water channel laminated with peach skin fleece with brushed surface has better anti-deformation, stronger burst resistance and tensile resistance, is more stable, and will have better improvement for the following three problems.

[0091] Problem 1: The pipeline will be very thick, and the body feeling when lying on it is not good;

[0092] Problem 2: The required water volume will increase, and the requirements for heating and cooling capacity will increase, affecting the heating and cooling speed;

[0093] Problem 3: When the host is shut down, the work done by the water pump disappears, and the host will have a strong backwater pressure. If the host does not have a structure to prevent backwater, the water will overflow from the water tank opening.

[0094] The high-frequency device has upper and lower molds. The fabric is placed in the center and the required water channels and shapes are pressed out through the patterns on the molds, thereby forming the blanket body 39.

[0095] In the present utility model, the number of temperature zones of the blanket body 39 corresponds to and is the same as that of the lower water tank 4, and they are correspondingly connected. As Figure 9 shown, here, taking the example of having two temperature zones, they are the non-connecting temperature zone I 53 and temperature zone II 47. The temperature zone I 53 is connected to the outlet outer pipe I 24 of the outlet pipe group and the circulation outer pipe I 26 of the return water circulation pipe group through the interface I 43, so as to realize the connection with one of the two temperature zones of the lower water tank 4. Similarly, the temperature zone II 47 is connected to the outlet outer pipe II 25 of the outlet pipe group and the circulation outer pipe II 27 of the return water circulation pipe group through the interface II 44, so as to realize the connection with the other one of the two temperature zones of the lower water tank 4.

[0096] For the present utility model, the parts not described are the prior art.

[0097] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A control structure for preventing the blanket from backwater, characterized in that, Comprising: A casing (1), within which an independent double water tank (2) is installed. The double water tank (2) includes an upper water tank (3) for storing and replenishing water and a lower water tank (4) located below the upper water tank (3) for replenishing water to the blanket body (39). There is a control structure (5) for preventing the blanket body (39) from backflow between the upper water tank (3) and the lower water tank (4). The control structure (5) for preventing the blanket body (39) from backflow includes a pump III (6) and a water delivery pipe (8). The pump III (6) is communicated with the upper water tank (3). One end of the water delivery pipe (8) is connected to the pump III (6), and the other end is connected to the lower water tank (4). A one-way valve (7) is provided on the water delivery pipe (8).

2. The anti-backwater control structure of a blanket body according to claim 1, characterized in that, There is an exhaust structure (9) between the upper water tank (3) and the lower water tank (4).

3. The anti-backwater control structure for a blanket body according to claim 2, characterized in that, The exhaust structure (9) includes an exhaust pipe I (10) and a normally closed solenoid valve (11) located on the exhaust pipe I (10). One end of the exhaust pipe I (10) is connected to the upper water tank (3), and the other end is connected to the lower water tank (4).

4. The anti-backwater control structure for a blanket body according to claim 1, characterized in that, An evaporator (16) is provided within the lower water tank (4).

5. The anti-backwater control structure of a blanket body according to claim 4, characterized in that, The upper and lower sides of the evaporator (16) are tightly abutted against the spacer I (14) on the upper and lower inner walls of the lower water tank (4), and a spacer II (56) as a support is provided in the middle of the evaporator.

6. The anti-backwater control structure for a blanket body according to claim 4, characterized in that, The evaporator (16) is in the shape of a serpentine coil or a spiral structure.

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