Energy-saving intelligent water boiler

Abstract

An energy-saving intelligent water boiler relates to the technical field of water boiler equipment, a layered water inlet control valve is provided with a U-shaped purified water inlet pipe, the top of the purified water inlet pipe is of a U-shaped structure, an L-shaped heat exchange water tank is arranged below a water outlet of the U-shaped end, the bottom of the L-shaped heat exchange water tank is fixed at the inner bottom of a water tank, and an electric heating pipe is located above the L-shaped heat exchange water tank. A temperature detection probe is arranged above the electric heating pipe, a liquid level detection probe set is further arranged on one side of the L-shaped heat exchange water cylinder, a heat dissipation air channel is arranged on one side between the shell and the water tank, and heat dissipation shutter holes are formed in the position, located on a back plate of the shell, above the heat dissipation air channel. A plurality of groups of liquid level probes are matched with a layered water inlet control system, so that the water inlet amount can be accurately controlled, laminar stepping heating is carried out, a water inlet pipe is suspended above a preheating exchange system, the backflow condition of water in a water tank is effectively avoided, meanwhile, a chimney effect unpowered natural wind heat dissipation structure is adopted, the heat dissipation performance of elements in equipment is effectively improved, and the service life of the equipment is prolonged. And the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to an energy-saving intelligent water boiler, and relates to the technical field of water boiler equipment. Background Art

[0002] Water boiling machines are commonly used household appliances in daily life. Using water boiling machines can conveniently obtain boiled cold water or hot water, bringing convenience to people's daily life.

[0003] The traditional water boiler heats the water in the water tank uniformly through electric heating. When the water volume decreases, water is added and heated to the set temperature again. There are cases of yin and yang water and thousand-boiling water. In addition, the heating is slow, the water outlet temperature is not accurate enough, and the heat energy loss is large. In order to solve the problems existing in the traditional water boiler, some existing water boilers adopt a more intelligent heating structure, which can heat the incoming water in some areas. The heated purified water can be directly drunk, and the new water can be heated after adding water, thereby avoiding repeated heating and boiling of the heated water. However, the temperature detection of the heated water in the existing heating structure is relatively inaccurate, and there is a problem of adding new water. The temperature of the old water after heating is insufficient, resulting in inaccurate water outlet temperature. At the same time, the water inlet pipe of the existing water boiler is mostly a connecting pipe, and the water inlet pipe and the exchange preheated water pipe are a connecting structure. Under special circumstances, a siphon phenomenon will occur, causing the water in the water tank to flow back to the outside, posing a safety hazard. In addition, the heat dissipation of the existing water boiler mostly adopts a side wall heat dissipation structure, and heat is dissipated through multiple heat dissipation holes or louver holes. However, the method of only setting heat dissipation holes cannot dissipate heat more quickly, which has a certain impact on the service life of the components. Therefore, a new energy-saving intelligent water boiler is proposed to solve the problems existing in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide an energy-saving intelligent water boiler in view of the defects or shortcomings in the prior art. Through multiple groups of liquid level probes and a stratified water inlet control system, the water inlet amount can be accurately controlled, and laminar step heating can be performed. The water inlet pipe is suspended above the preheating exchange system to effectively avoid the backflow of water in the water tank. At the same time, a chimney effect unpowered natural wind heat dissipation structure is adopted to effectively improve the heat dissipation performance of the components in the equipment and extend the service life.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it comprises a shell 1 and a water tank 2, the water tank 2 is arranged in the shell 1, a stratified water inlet control valve 6 is arranged on one side of the bottom of the water tank 2, a U-shaped clean water inlet pipe 8 is arranged on the stratified water inlet control valve 6, the top of the clean water inlet pipe 8 is a U-shaped structure, and the U-shaped end is located at the top of the water tank 2, an L-shaped heat exchange water cylinder 7 is arranged below the water outlet of the U-shaped end, the bottom of the L-shaped heat exchange water cylinder 7 is fixed to the bottom of the water tank 2, an electric heating pipe 5 is fixedly arranged on one side of the bottom of the water tank 2, the electric heating pipe 5 is located above the L-shaped heat exchange water cylinder 7 and is fixed to the water tank 2 through a fixing plate 17, and a temperature detection probe 4 is arranged above the electric heating pipe 5, a liquid level detection probe group 10 is also arranged on one side of the L-shaped heat exchange water cylinder 7, a heat dissipation duct 11 is arranged on one side between the shell 1 and the water tank 2, and a heat dissipation louver hole 15 is arranged above the heat dissipation duct 11 at the back plate of the shell 1.

[0006] Furthermore, the top opening of the L-shaped heat exchange water cylinder 7 is larger than the U-shaped end opening of the U-shaped purified water inlet pipe 8, and the distance between the two openings is 5 mm.

[0007] Furthermore, the electric heating tubes 5 are arranged in a plurality of groups side by side, and the ends of the electric heating tubes 5 are close to the vertical ends of the L-shaped heat exchange water cylinders 7 .

[0008] Furthermore, the parallel end outlet end of the bottom of the L-shaped heat exchange water cylinder 7 is provided with an inclined opening, and the inclined opening is arranged downward. Meanwhile, the parallel end opening of the bottom of the L-shaped heat exchange water cylinder 7 is located at the center position of the bottom of the water tank 2 .

[0009] Furthermore, there is a heat-insulating layer 3 between the water tank 2 and the shell 1 , and the heat-insulating layer 3 is filled with a high-density polyurethane foam layer.

[0010] Furthermore, the liquid level detection probe group 10 includes a high-position probe 10-1, a middle-position probe 10-2, and a low-position probe 10-3. The high-position probe 10-1 is close to the top water inlet of the L-shaped heat exchange water cylinder 7, the depth of the middle-position probe 10-2 is 1.2 times the depth of the high-position probe 10-1, and the bottom of the low-position probe 10-3 is flush with the temperature detection probe 4.

[0011] Furthermore, a recovery water tank 19 is provided at the bottom of the water tank 2 , and an overflow recovery pipe 9 is provided at one side of the L-shaped heat exchange water cylinder 7 , and the overflow recovery pipe 9 passes through the water tank 2 and is connected to the bottom recovery water tank 19 .

[0012] Furthermore, a temperature control system 12 is disposed on the top of the shell 1 . The temperature control system 12 is electrically connected to the temperature detection probe 4 . The control panel end of the temperature control system 12 is located on the surface of the shell 1 .

[0013] Furthermore, an electronic control system 16 is provided at the bottom of the water tank 2, and a power switch 14 is provided on the side wall of the shell 1. The power switch 14 is electrically connected to the electronic control system 16, and the electronic control system 16 is electrically connected to the electric heating tube 5, the stratified water inlet control valve 6, and the liquid level detection probe group 10.

[0014] Furthermore, a drain pipe 13 is provided at the bottom of the water tank 2 , and the drain pipe 13 runs through the shell 1 .

[0015] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: through multiple groups of liquid level probes and a stratified water inlet control system, the water inlet volume can be accurately controlled, and laminar step heating can be performed, and the water inlet pipe is suspended above the preheating exchange system to effectively avoid water backflow in the water tank. At the same time, the chimney effect unpowered natural wind heat dissipation structure is adopted to effectively improve the heat dissipation performance of the components in the equipment and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 yes Figure 1 Side view of

[0019] Figure 3 yes Figure 1 Bottom view of

[0020] Figure 4 It is a schematic diagram of the installation position of the L-shaped heat exchange water cylinder 7 in the utility model;

[0021] Figure 5 yes Figure 4 Side view of

[0022] Figure 6 It is a schematic diagram of the installation position of the liquid level detection probe group 10 in the utility model;

[0023] Figure 7 It is a schematic diagram of the connection relationship between the U-shaped purified water inlet pipe 8 and the stratified water inlet control valve 6 in the utility model;

[0024] Figure 8 It is a schematic diagram of the structure of the thermal insulation layer 3 in the utility model;

[0025] Fig. 9 It is a schematic diagram of the installation position of the overflow water recovery pipe 9 and the recovery water tank 19 in the utility model;

[0026] Fig.10 It is a schematic diagram of the heat dissipation state of the utility model.

[0027] Explanation of the accompanying drawings: shell 1, water tank 2, insulation layer 3, temperature detection probe 4, electric heating tube 5, stratified water inlet control valve 6, L-shaped heat exchange water cylinder 7, U-shaped clean water inlet pipe 8, overflow recovery pipe 9, liquid level detection probe group 10, heat dissipation air duct 11, temperature control system 12, drain pipe 13, power switch 14, heat dissipation louver 15, electronic control system 16, fixing plate 17, water inlet 18, recovery water tank 19, high-position probe 10-1, middle-position probe 10-2, low-position probe 10-3. DETAILED DESCRIPTION

[0028] See also Figure 1-10 As shown, the technical solution adopted in this specific implementation is: it includes a shell 1 and a water tank 2, the water tank 2 is arranged in the shell 1, and there is a heat preservation layer 3 between the water tank 2 and the shell 1, and a high-density polyurethane foam layer is filled in the heat preservation layer 3. In this embodiment, a double-layer metal plate structure is used as the shell and the water tank. At the same time, through foaming, it is evenly and densely distributed between the water tank and the outer shell body to play a heat preservation role. The polyurethane heat preservation material has the advantages of light weight, low thermal conductivity, good heat resistance, aging resistance, easy adhesion with other substrates, and no droplets generated during combustion. It can better stabilize the equipment structure while doing a good job of heat preservation and heat insulation. At the same time, the point foaming insulation method is used to reduce the conduction of heat energy. The polyurethane heat preservation layer between the two metal plates forms physical heat insulation, which effectively reduces the conduction of heat energy and greatly reduces the loss of water temperature, thereby obtaining a better heat preservation effect.

[0029] More specifically, a stratified water inlet control valve 6 is provided at one side of the bottom of the water tank 2. The stratified water inlet control valve mainly has two ports, one of which is a water inlet 18 connected to an external clean water inlet pipe. A U-shaped clean water inlet pipe 8 is provided on the stratified water inlet control valve 6. The U-shaped clean water inlet pipe is connected to the second port of the stratified water inlet control valve. The stratified water inlet control valve can effectively control the clean water flow rate and perform stratified rapid heating.

[0030] In the present embodiment, the top of the clean water inlet pipe 8 is a U-shaped structure, and the U-shaped end is located at the top of the water tank 2. An L-shaped heat exchange water cylinder 7 is arranged below the water outlet of the U-shaped end. The bottom of the L-shaped heat exchange water cylinder 7 is fixed to the bottom of the water tank 2. Traditional water inlet structures are mostly direct-connected. When the bottom water inlet end is repaired, due to the pressure and height difference, a siphon phenomenon will occur, and the hot water in the water tank will be sucked out and discharged to the outside, which poses a safety hazard. Therefore, the top of the clean water inlet pipe is designed to be a U-shaped structure, and the water outlet of the U-shaped end is located above the water inlet at the top of the L-shaped heat exchange water cylinder. The top opening of the L-shaped heat exchange water cylinder 7 is larger than the U-shaped end opening of the U-shaped clean water inlet pipe 8, and the distance between the two openings is 5mm, which ensures that the clean water can completely enter the L-shaped heat exchange water cylinder when inletting, and because they are not connected, there will be no siphon phenomenon, which greatly improves the safety of use.

[0031] An electric heating tube 5 is fixedly arranged on one side of the bottom of the water tank 2. The electric heating tube 5 is located above the L-shaped heat exchange water cylinder 7 and is fixed to the water tank 2 through a fixing plate 17. A temperature detection probe 4 is arranged above the electric heating tube 5. Several groups of the electric heating tubes 5 are arranged side by side, and the ends of the electric heating tubes 5 are close to the vertical ends of the L-shaped heat exchange water cylinder 7. To ensure that the electric heating tubes can heat in all directions, different numbers of electric heating tubes are arranged according to water tanks of different specifications. The length of the electric heating tubes is limited to not contacting the vertical ends of the L-shaped heat exchange water cylinders. At the same time, the electric heating tubes are made of 316 stainless steel anti-scaling integrated type, the body is stamped and formed, and water and electricity are separated. Multiple groups of electric heating tubes avoid the existence of heating blind spots, and the heating is more uniform and efficient, ensuring that the water outlet is at the best water temperature;

[0032] The temperature detection probe is set above the electric heating tube. When the water level is above the temperature detection probe, heating starts and the cold water layer is heated. Low water level heating can boil the cold water layer as quickly as possible to achieve rapid water use. At the same time, the water temperature is still detected when the water level rises. If the water temperature is lower than the set temperature, it is heated again to achieve heat preservation.

[0033] A liquid level detection probe group 10 is also provided on one side of the L-shaped heat exchange water cylinder 7. The liquid level detection probe group 10 includes a high-level probe 10-1, a middle-level probe 10-2, and a low-level probe 10-3. The high-level probe 10-1 is close to the water inlet at the top of the L-shaped heat exchange water cylinder 7, the depth of the middle-level probe 10-2 is 1.2 times the depth of the high-level probe 10-1, and the bottom of the low-level probe 10-3 is flush with the temperature detection probe 4. By setting three liquid level probes, high, medium and low water level detection is performed. Among them, the high and medium liquid level probes are close to each other. When the high-level probe detects that the water level line is reached, it sends a stop water addition signal to prevent water leakage. The middle-level probe not only serves as an early warning, but also allows the user to clearly understand the water storage situation in the water tank. The low-level probe is the water replenishment signal sending end and is the judgment position for cold water heating. When the cold water level When it reaches the low-level probe, a heating signal will be triggered. The low-level probe is flush with the temperature detection probe to achieve accurate water level judgment and heating. If the water level is lower than the probe position, it will not be heated. The electric heating tube will be turned on only when the water level is higher than the low-level probe, and the start and stop of the electric heating tube are intelligently controlled by the temperature detection probe. Due to the laminar stepping heating principle, the water layer that does not pass the temperature detection probe is one layer. After one layer is heated, water is replenished and the water layer moves up. During the upward movement of the water layer, the temperature is reduced due to contact with cold water. At this time, the temperature detection probe detects the temperature change and starts the electric heating tube again to make up the temperature. The water is heated in a layered step-by-layer manner. One layer is boiled and then heated. The water moves up layer by layer, and intermittent supplementary heating is performed during the rising water level. In this way, not only a small amount of water can be heated, but also the overall water temperature in the water tank can be ensured.

[0034] A heat dissipation duct 11 is arranged on one side between the shell 1 and the water tank 2, and a heat dissipation louver hole 15 is arranged on the back plate of the shell 1 above the heat dissipation duct 11. In the present embodiment, the heat dissipation louver hole is arranged on the upper back side of the shell. At the same time, an air inlet hole is also opened at the bottom of the shell 1. The principle of hot air rising to drive the air flow is utilized, and a certain suction force is generated when the external air flows through the heat dissipation louver hole. The hot air enters through the bottom of the heat dissipation duct and is discharged from the top through the heat dissipation louver hole, thereby achieving the purpose of quickly dissipating the heat of the electrical components and effectively extending the service life of the equipment. It should be noted that the heat dissipation duct needs to be set higher than the position of each component to ensure that the heat generated by the component can enter through the duct to obtain the best heat dissipation effect.

[0035] To be more specific, the outlet end of the parallel end of the bottom of the L-shaped heat exchange water cylinder 7 is provided with an inclined opening, and the inclined opening is arranged downward. At the same time, the opening of the parallel end of the bottom of the L-shaped heat exchange water cylinder 7 is located at the center position of the bottom of the water tank 2. In this embodiment, the water outlet port of the L-shaped heat exchange water cylinder is arranged at the center position and is arranged to be a downward inclined opening structure. The cold water discharged therefrom will not directly contact the upper hot water. At the same time, due to the radial middle water inlet, a laminar flow effect is formed, thereby avoiding direct mixing of cold water and boiling water, and avoiding the yin and yang water situation.

[0036] To be more specific, a recovery water tank 19 is provided at the bottom of the water tank 2, and an overflow recovery pipe 9 is provided on one side of the L-shaped heat exchange water cylinder 7. The overflow recovery pipe 9 runs through the water tank 2 and is connected with the bottom recovery water tank 19. By setting the overflow recovery pipe, not only can the excess water be discharged in time in case of an accident, but it is also an important structure for heat exchange. When the water vapor in the water tank enters from the overflow recovery pipe, it is close to the L-shaped heat exchange water cylinder and heat exchange occurs, so the cold water in the L-shaped heat exchange water cylinder is preheated, thereby utilizing the waste heat to achieve the purpose of energy saving, and the waste water enters the bottom recovery water tank and is discharged to the external recovery equipment.

[0037] To be more specific, a temperature control system 12 is provided on the top of the shell 1, and the temperature control system 12 is electrically connected to the temperature detection probe 4. The control panel end of the temperature control system 12 is located on the surface of the shell 1. The temperature control system controls the heating behavior, can conveniently set the temperature, and cooperates with the temperature detection probe to heat. When the temperature has not reached the set temperature, heating control is performed, and insulation is performed after the set temperature is reached.

[0038] To be more specific, an electric control system 16 is provided at the bottom of the water tank 2, and a power switch 14 is provided on the side wall of the shell 1. The power switch 14 is electrically connected to the electric control system 16, and the electric control system 16 is electrically connected to the electric heating tube 5, the stratified water inlet control valve 6, and the liquid level detection probe group 10. In this embodiment, the electric control system is connected to the electric heating tube and the liquid level detection probe group, and is also connected to the temperature control system. According to the detection results of the liquid level detection probe group and the temperature detection probe, the water addition and heating are comprehensively controlled, and the control is more intelligent and accurate.

[0039] To be more specific, a drain pipe 13 is also provided at the bottom of the water tank 2. The drain pipe 13 runs through the shell 1. The corners of the water tank are arranged in an arc structure, and a drain pipe is arranged at the bottom to facilitate the subsequent drainage of the water tank and cleaning of the dirt inside.

[0040] The working principle of the utility model is as follows: after the required temperature is set by the temperature control system 12, the stratified water inlet control valve 6 controls the clean water to enter the U-shaped clean water inlet pipe 8 from the water inlet 18 and enter the L-shaped heat exchange water cylinder 7. No heat exchange occurs during the first use, but heat exchange will occur during subsequent circulation. The cold water is preheated and discharged from the inclined opening at the bottom of the L-shaped heat exchange water cylinder 7. When the water level reaches the position of the low-level probe 10-3, a start heating signal is sent to the electric control system 16 to start the electric heating tube 5 for heating and stop water inlet. Since the electric heating tube 5 is close to the position of the L-shaped heat exchange water cylinder 7, the bottom water can be quickly heated. After reaching the set temperature, the heating is stopped and water is replenished again. Similarly, the newly replenished cold water is heated. Since water is added radially on one side, a laminar flow effect will be formed. The upper hot water gradually rises, and the temperature detection probe 4 maintains the detection state during the rising process. When the rising boiling water temperature is slightly reduced, the electric heating tube 5 will be started again to heat to the original set temperature. When the temperature reaches the set temperature again Stop heating. When the original boiling water overflows the temperature detection probe 4, stop heating. At this time, the newly added cold water reaches the low-level probe 10-3 position again, and a new layer of cold water is heated. In this layered step-by-step heating method, one layer is boiled and then heated, and the water is moved up layer by layer. In the process of rising water level, intermittent supplementary heating is performed. In this way, not only a small amount of water can be heated, but also the overall water temperature in the water tank 2 can be ensured. Therefore, the drinking water used by the user each time is a single boiled clean water. In the heating and temperature rising process, steam and overflow water can be recovered from the overflow recovery pipe 9, and heat exchange is performed with the L-shaped heat exchange water cylinder 7 during the downstream process from the overflow recovery pipe 9 to preheat the cold water, thereby achieving energy-saving effect. At the same time, when the equipment is working, the heat emitted by the component is dissipated in an unpowered manner. When the outside air flows, due to the principle of chimney effect, the hot air in the equipment is sucked out by the external flowing air through the heat dissipation duct 11, thereby achieving the effect of unpowered heat dissipation, ensuring that the component works under relatively low temperature conditions and extending the service life.

[0041] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. An energy-saving intelligent water boiler, comprising a housing (1) and a water tank (2), wherein the water tank (2) is arranged in the housing (1), and is characterized in that: A stratified water inlet control valve (6) is provided on one side of the bottom of the water tank (2), a U-shaped clean water inlet pipe (8) is provided on the stratified water inlet control valve (6), the top of the clean water inlet pipe (8) is a U-shaped structure, and the U-shaped end is located at the top of the water tank (2), an L-shaped heat exchange water cylinder (7) is provided below the water outlet of the U-shaped end, the bottom of the L-shaped heat exchange water cylinder (7) is fixed to the bottom of the water tank (2), and an electric heating pipe (5) is fixedly provided on one side of the bottom of the water tank (2). The heat pipe (5) is located above the L-shaped heat exchange water cylinder (7) and is fixed to the water tank (2) via a fixing plate (17). A temperature detection probe (4) is arranged above the electric heating pipe (5). A liquid level detection probe group (10) is also arranged on one side of the L-shaped heat exchange water cylinder (7). A heat dissipation duct (11) is arranged on one side between the housing (1) and the water tank (2). A heat dissipation louver hole (15) is arranged above the heat dissipation duct (11) and on the back plate of the housing (1).

2. The energy-saving intelligent water boiler according to claim 1, characterized in that: The top opening of the L-shaped heat exchange water cylinder (7) is larger than the U-shaped end opening of the U-shaped purified water inlet pipe (8), and the distance between the two openings is 5 mm.

3. The energy-saving intelligent water boiler according to claim 1, characterized in that: The electric heating tubes (5) are arranged in a plurality of groups side by side, and the ends of the electric heating tubes (5) are close to the vertical ends of the L-shaped heat exchange water cylinders (7).

4. The energy-saving intelligent water boiler according to claim 1, characterized in that: The parallel end outlet end of the bottom of the L-shaped heat exchange water cylinder (7) is provided with an inclined opening, and the inclined opening is arranged downward. Meanwhile, the parallel end opening of the bottom of the L-shaped heat exchange water cylinder (7) is located at the center of the bottom of the water tank (2).

5. The energy-saving intelligent water boiler according to claim 1, characterized in that: A heat-insulating layer (3) is provided between the water tank (2) and the shell (1), and a high-density polyurethane foam layer is filled in the heat-insulating layer (3).

6. The energy-saving intelligent water boiler according to claim 1, characterized in that: The liquid level detection probe group (10) comprises a high-position probe (10-1), a middle-position probe (10-2), and a low-position probe (10-3); the high-position probe (10-1) is close to the water inlet at the top of the L-shaped heat exchange water cylinder (7); the depth of the middle-position probe (10-2) is 1.2 times the depth of the high-position probe (10-1); and the bottom of the low-position probe (10-3) is flush with the temperature detection probe (4).

7. The energy-saving intelligent water boiler according to claim 1, characterized in that: A recovery water tank (19) is arranged at the bottom of the water tank (2), and an overflow recovery pipe (9) is arranged on one side of the L-shaped heat exchange water cylinder (7). The overflow recovery pipe (9) runs through the water tank (2) and is connected to the bottom recovery water tank (19).

8. The energy-saving intelligent water boiler according to claim 1, characterized in that: A temperature control system (12) is arranged on the top of the shell (1), the temperature control system (12) is electrically connected to the temperature detection probe (4), and a control panel end of the temperature control system (12) is located on the surface of the shell (1).

9. The energy-saving intelligent water boiler according to claim 1, characterized in that: An electric control system (16) is arranged at the bottom of the water tank (2), and a power switch (14) is arranged on the side wall of the shell (1); the power switch (14) is electrically connected to the electric control system (16), and the electric control system (16) is electrically connected to the electric heating pipe (5), the stratified water inlet control valve (6), and the liquid level detection probe group (10).

10. The energy-saving intelligent water boiler according to claim 1, characterized in that: A drainage pipe (13) is also provided at the bottom of the water tank (2), and the drainage pipe (13) runs through the shell (1).

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