Patent Description:
The heat pump dishwasher includes a washing cavity and an installation cavity. The washing cavity is used for holding the tableware to be washed, and the installation cavity is used for holding the electrical elements. Heat transmission usually occurs when the heat pump dishwasher operates, and the water vapor of the air in the installation cavity will be liquefied into the condensed water during the heat transmission. Thus, when a lot of condensed water gathers in the installation cavity, the installation cavity will rust or the operation of the electrical components will be affected, resulting in a potential safety hazard. <CIT> relates generally to a dishwasher, with a housing, a tub arranged in the housing and with a heat pump. <CIT> relates generally to a refrigeration unit used for cooling the merchandiser and to the resultant air-flow distribution in the merchandiser required to maximize cooling efficiency. <CIT> relates generally to a heat pump dishwasher, ensuring the heat exchange requirements of an evaporator surface. <CIT> relates generally to a drain water evaporator for use in refrigerators, low-temperature showcases. <CIT> relates generally to a household refrigeration appliance, with a condenser to be arranged in a refrigerant circuit of the refrigeration appliance as a heat source and with an evaporation container formed on the condenser for receiving the defrost water. <CIT> relates generally to a showcase in which the control of a condenser fan that also serves to evaporate drain water is improved and the arrangement of components in a machine room is improved. <CIT> relates generally to a household refrigeration appliance, with an evaporation tray and a voltage-carrying cable which can be placed in an air space above the evaporation tray, a support grid extends above a water level of the evaporation tray in order to prevent contact of the cable with the water. <CIT> relates generally to a heat pump dishwasher, aiming to solve the problem in the existing technology that when a lot of condensed water gathers in the installation cavity, the installation cavity will rust or the operation of the electrical components will be affected, resulting in a potential safety hazard. <CIT> relates generally to a heat pump type dish washing machine, which adopts a heat pump system to heat washing water, and comprises an evaporator, a collecting container arranged at the bottom of the evaporator and used for collecting condensate water of the evaporator, and a heating module used for raising the ambient temperature around the evaporator. <CIT> relates generally to a heat pump type dish washing machine and a control method thereof. <CIT> relates generally to a heat pump dish washing machine, wherein the dish washing machine can absorb heat of the energy storage medium for heating washing water in the dish washing machine, and energy consumption is greatly lowered. <CIT> relates generally to a heat pump type dishwasher and a control method thereof, wherein the condensate water evaporation device is arranged and made of hydrophilic materials, the bottom of the evaporator is in contact with the water collecting device to absorb water, the loose hydrophilic materials can increase the evaporation area of water, the evaporation speed is increased, and a water pump is omitted. <CIT> relates generally to a heat pump type dish-washing machine and a control method thereof, wherein the heat pump system is only provided with two heat exchangers including the evaporator and the condenser, the dehumidification and drying effects are achieved in the drying stage, the structural arrangement is simple, and the size of the containing space is greatly reduced. <CIT> relates generally to a dishwasher having a heat pump capable of shorten the heating time of washing water to suppress washing time from being prolonged. <CIT> relates generally to a dishwasher of the heat pump type enabling heating the washing water.

In the following, each of the described methods, apparatuses, embodiments, examples, and aspects, which do not fully correspond to the invention as defined in the claims is thus not according to the invention and is, as well as the whole following description, present for illustration purposes only or to highlight specific aspects or features of the claims. Embodiments not falling under the scope of the claims should be interpreted as examples useful for understanding the invention. The main objective of the present application is to provide a heat pump dishwasher, aiming to solve the problem in the existing technology that when a lot of condensed water gathers in the installation cavity, the installation cavity will rust or the operation of the electrical components will be affected, resulting in a potential safety hazard.

In order to solve the above objective, the present application provides a heat pump dishwasher including a chassis and a heat pump system.

A liquid collecting groove is provided at an upper side of the chassis.

The heat pump system includes an evaporator and a compressor, both the evaporator and the compressor are installed at the chassis, and the compressor is installed at the liquid collecting groove.

In an embodiment, a supporting member is provided at a bottom of the liquid collecting groove, and the supporting member is configured to support the compressor to make the compressor spaced apart from the bottom of the liquid collecting groove.

In an embodiment, a distance between the compressor and the bottom of the liquid collecting groove is L1, and L1 is greater than <NUM> and is not greater than <NUM>.

According to the invention, the chassis includes a liquid storage box, the liquid storage box includes a box body with an opening facing upward and a cover body for covering the opening, the cover body is partially concave to form the liquid collecting groove, the evaporator is installed inside the box body, the compressor is located outside the box body, and heat transfer fluid is stored in the box body.

In an embodiment, an initial liquid level of the heat transfer fluid in the box body is not higher than a lowest point of the cover body.

In an embodiment, an overflow port is provided at the liquid storage box, and the overflow port is higher than a lowest point of the cover body.

In an embodiment, the overflow port is provided at a side wall surface of the box body.

In an embodiment, the heat pump dishwasher further includes a washing box body, and at least part of the washing box body is supported by an upper end surface of the cover body.

In an embodiment, a sealing ring is provided between a lower end surface of the cover body and the box body.

In an embodiment, the washing box body is installed at the upper end surface of the cover body through an installation structure, the installation structure includes a supporting portion extending upward from the cover body, and an upper end of the supporting portion is configured to abut against the washing box body, to allow an installation gap formed between the washing box body and the cover body, and the compressor is located in the installation gap.

In an embodiment, the installation structure further includes a connection portion extending vertically, and both ends of the connection portion are respectively connected to a side wall of the washing box body and the supporting portion.

In an embodiment, a guiding structure is provided between the washing box body and the supporting portion. The guiding structure includes a guiding portion extending vertically and a matching portion matched with the guiding portion. One of the guiding portion and the matching portion is provided at the washing box body, and the other one of the guiding portion and the matching portion is provided at the supporting portion.

In an embodiment, the guiding portion is a guiding column, and the matching portion is a guiding hole matched with the guiding portion.

In an embodiment, a bottom of the washing box body is provided with a drainage groove, the heat pump dishwasher further includes a washing system, and the washing system includes a water inlet flow path provided in the installation gap, a water inlet of the water inlet flow path communicates with the drainage groove, a water outlet of the water inlet flow path communicates with a spray arm provided in the washing box body, and a circulation water pump is provided at the water inlet flow path.

The heat pump system further includes a condenser provided at the water inlet flow path, the condenser includes a water inlet pipe, the water inlet pipe includes a condensate water inlet and a condensate water outlet, the condensate water inlet is lower than the condensation water outlet, and the condenser is located between the drainage groove and the circulation water pump.

A bottom of the drainage groove is lower than the condensation water inlet, and the condensation water outlet is lower than a circulation water inlet of the circulation water pump.

In an embodiment, the washing system further includes a drainage flow path provided at the installation gap, a drainage pump is provided at the drainage flow path, a drainage inlet of the drainage flow path communicates with the drainage groove, the drainage inlet is lower than the condensation water inlet, and the drainage outlet of the drainage flow path communicates with a drainage pipe.

In the present application, the heat pump dishwasher includes a chassis and a heat pump system, and a liquid collecting groove is provided at an upper side of the chassis. The heat pump system includes an evaporator and a compressor, both the evaporator and the compressor are installed at the chassis, and the compressor is installed at the liquid collecting groove. Not only the condensed water can be collected, but also the condensed water in the liquid collecting groove will be evaporated due to the heat released by the compressor during the operation process, which can avoid that the condensation water exists in the liquid collecting groove for a long time to cause the corrosion of the liquid collecting groove and affect the operation of electrical components. In addition, heat is absorbed during the evaporation process of the condensed water, which can take away the heat of the compressor and cool the compressor.

To illustrate the technical solutions according to the embodiments of the present application or the related art more clearly, the accompanying drawings for describing the embodiments or the related art are introduced briefly in the following. As will be apparent, the accompanying drawings in the following description show only some embodiments of the present application. Persons skilled in the art can derive other drawings from the structures of the accompanying drawings without creative efforts.

The realization of the objective, functional characteristics, and advantages of the present application are further described with reference to the accompanying drawings.

The technical solutions of the embodiments of the present application will be described clearly in the following with reference to the accompanying drawings of the embodiments of the present application. It is obvious that the embodiments described are only some rather than all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of the present application.

It should be noted that all the directional indications (such as up, down, left, right, front, rear. ) in the embodiments of the present application are only used to explain the relative positional relationship, movement, or the like of the components in a certain posture (as shown in the drawings). If the specific posture changes, the directional indication will change accordingly.

Besides, the descriptions associated with, e.g., "first" and "second," in the present application are merely for descriptive purposes, and cannot be understood as indicating or suggesting relative importance or impliedly indicating the number of the indicated technical feature. Therefore, the feature associated with "first" or "second" can expressly or impliedly include at least one such feature. In addition, the meaning of "and/or" in the whole text includes three parallel solutions. Taking "A and/or B" as an example, it includes solution A, solution B, or solutions in which A and B are satisfied at the same time. Besides, the technical solutions of the various embodiments can be combined with each other, but the combinations must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist, nor does it fall within the scope of the present application.

The heat pump dishwasher includes a washing cavity and an installation cavity. The washing cavity is used for holding the tableware to be washed, and the installation cavity is used for holding the electrical elements. Heat transmission usually occurs when the heat pump dishwasher operates, and the water vapor of the air in the installation cavity will be liquefied into the condensed water during the heat transmission. Thus, when a lot of condensed water gathers in the installation cavity, the installation cavity will rust or the operation of the electrical components will be affected, resulting in a potential safety hazard.

In view of this, the present invention provides a heat pump dishwasher, aiming to solve the problem in the existing technology that when a lot of condensed water gathers in the installation cavity, the installation cavity will rust or the operation of the electrical components will be affected, resulting in a potential safety hazard. <FIG> are structural schematic views of a heat pump dishwasher according to embodiments of the present application.

As shown in <FIG>, the heat pump dishwasher <NUM> of the present invention includes a chassis <NUM> and a heat pump system. A liquid collecting groove a is provided at an upper side of the chassis <NUM>. The heat pump system includes an evaporator <NUM> and a compressor <NUM>. The evaporator <NUM> and the compressor <NUM> are installed at the chassis <NUM>, and the compressor <NUM> is installed at a position corresponding to the liquid collecting groove a.

In this application, since the evaporator <NUM> is at a low temperature when the heat pump system operates, the evaporator <NUM> is used as a cold source. The evaporator <NUM> is installed at the chassis <NUM>, so that the cold energy of the evaporator <NUM> will be transmitted to the chassis <NUM> during the heat transmission process. In this case, the surface temperature of the chassis <NUM> will decrease, and condensed water will be generated when the surface of the chassis <NUM> contacts with air. The condensed water condensed at the upper side of the chassis <NUM> can gather in the liquid collecting groove a, and the condensed water in the liquid collecting groove a can be evaporated due to the heat released by the compressor <NUM> installed at the liquid collecting groove a during the operation process, which can not only collect the condensed water, but also can avoid that the condensation water exists in the liquid collecting groove a for a long time to cause the corrosion of the liquid collecting groove a and affect the operation of electrical components. In addition, heat is absorbed during the evaporation process of the condensed water, which can take away the heat of the compressor <NUM> and cool the compressor <NUM>.

As shown in <FIG>, in an embodiment of the present application, a supporting member is provided at a bottom of the liquid collecting groove a, and the supporting member is configured to support the compressor <NUM> to make the compressor <NUM> spaced apart from the bottom of the liquid collecting groove a. In this way, a dead angle, that is located in the contact position between the compressor <NUM> and the bottom of the liquid collecting groove a and caused by the direct contact between the compressor <NUM> and the bottom of the liquid collecting groove a, can be avoided. This dead angle may not only make it inconvenient to clean the contact position between the compressor <NUM> and the bottom of the liquid collecting groove a, but also make it inconvenient to disassemble and assemble the compressor <NUM> when the compressor <NUM> needs to be repaired. Further, this dead angle will cause the bottom of the liquid collecting groove a and the bottom of the compressor <NUM> to have a risk of corrosion after a long period of use.

It should be noted that there are many ways to install the compressor <NUM> at the liquid collecting groove a. For example, the compressor <NUM> may be provided with an installation seat, and the installation seat may be connected with the bottom of the liquid collecting groove a through a buckle structure, a threaded connection structure, etc., which is not be limiting in the present application.

As shown in <FIG> and <FIG>, in this embodiment, the supporting member includes a plurality of protruding columns <NUM> protruding from the bottom of the liquid collecting groove a, and the plurality of protruding columns <NUM> support the compressor <NUM>, so that there is a gap between the compressor <NUM> and the bottom of the liquid collecting groove a. In addition, the compressor <NUM> is installed at the plurality of protruding columns <NUM> through the threaded connection structure, which may not only realize the installation of the compressor <NUM>, but also make the compressor <NUM> detachably connected to the cover body <NUM>. In this way, it is easy to maintain and clean the compressor <NUM>, the operation is easy, and the connection is firm.

It should be noted that, considering that the compressor <NUM> will vibrate during operation, the supporting member is made of the elastic material, and the elastic deformation of the elastic material can offset the vibration of the compressor <NUM> with good effect. Specifically, the supporting material of the supporting member may be rubber, silica gel, etc., which is not limiting in this application.

Since the way of removing the condensed water is to remove the condensed water gathering in the liquid collecting groove a via heat generated in the operation of the compressor <NUM>, the distance between the compressor <NUM> and the bottom of the liquid collecting groove a cannot be too far, otherwise the condensed water in the liquid collecting groove a cannot be completely removed. Therefore, the distance between the compressor <NUM> and the bottom of the liquid collecting groove a is defined to be L1, and L1 is greater than <NUM> and not greater than <NUM>. Within this range, heat generated in the operation of the compressor <NUM> can completely evaporate the condensed water in the liquid collecting groove a, thereby improving the service life of the heat pump dishwasher <NUM>, and facilitating the installation of the compressor <NUM>.

In the current process of absorbing the cooling energy of the evaporator <NUM> through air cooling, there is a problem of noise. Therefore, as shown in <FIG> and <FIG>, according to the present invention, the chassis <NUM> includes a liquid storage box <NUM>, and the liquid storage box <NUM> includes a box body <NUM> with an opening facing upwards and a cover body <NUM> for covering the opening. The cover body <NUM> is partially concave to form the liquid collecting groove a, and the evaporator <NUM> is installed inside the box body <NUM>. The compressor <NUM> is located outside the box body <NUM>, and the box body <NUM> stores heat transfer fluid, so that heat transfer between the evaporator <NUM> in the box body <NUM> and the heat transfer fluid stored in the box body <NUM> can be realized via the natural flow of the heat transfer fluid. Therefore, the evaporator <NUM> can transmit the generated cold energy to the heat transfer fluid without parts such as fans or water pumps, and there is almost no noise in the working process, and the effect is good.

Moreover, since both the evaporator <NUM> and the heat transfer fluid are provided in the box body <NUM>, the heat pump dishwasher <NUM> has a compact structure, and the volume of the heat pump dishwasher <NUM> is reduced. In addition, since the evaporator <NUM> and the compressor <NUM> are respectively provided on both sides of the cover body <NUM>, the cold energy released by the evaporator <NUM> is first transmitted to the heat transfer fluid, and the cold energy in addition to the part stored in the heat transfer fluid will be transmitted to the liquid storage box <NUM>. Since the cover body <NUM> of the liquid storage box <NUM> is provided with electrical elements, to prevent the large amount of condensed water accumulated on the cover body <NUM> from overflowing, affecting the operation of the electrical elements and even causing safety hazards, the condensed water on the cover body <NUM> is accumulated in the liquid collecting groove a, and the condensed water in the liquid collecting groove a will be removed via the heat released by the compressor <NUM>. In addition, heat is absorbed during the evaporation process of the condensed water, so that the heat of the compressor <NUM> can be better taken away, and the temperature of the compressor <NUM> can be lowered. Since the liquid storage box is provided on the chassis <NUM>, the height of the heat pump dishwasher <NUM> decreases, the weight of the chassis <NUM> of the heat pump dishwasher <NUM> increases, and the center of gravity of the heat pump dishwasher <NUM> decreases, which will increase the structural stability of the heat pump dishwasher <NUM>.

It should be noted that, in this embodiment, the heat transfer fluid is used to absorb the cooling energy released by the evaporator, that is, to transfer heat with the evaporator. Since there are many types of heat transfer fluid, the heat transfer fluid in this application is preferably liquid at normal temperature (generally <NUM>-<NUM>) and solid at low temperature (generally below <NUM>). That is, the heat transfer fluid will undergo a phase change during the process of absorbing the cooling energy of the evaporator, and the process of changing from liquid to solid absorbs a lot of cooling energy of the evaporator <NUM>. Specifically, the heat transfer fluid can be a mixture composed of inorganic salt, water, coagulant, stabilizer and thickener, and can also be an aqueous solution of inorganic salt, water, etc. When the heat transfer fluid is water, the heat transfer fluid inlet of the box body <NUM> may communicate with the water supply device for adding water to the box body <NUM>, so that the heat transfer fluid outlet of the box body <NUM> communicates with the drain pump for drainage.

Further, as shown in <FIG>, the side wall of the liquid collecting groove a is inclined, so that the condensed water generated from the condensation of water vapor in the air can flow to the bottom of the liquid collecting groove a along the side wall, and then may gather at the bottom of the liquid collecting groove a, so that the condensed water can be evaporated and removed via the heat of the compressor <NUM>.

Specifically, the initial liquid level of the heat transfer fluid stored in the box body <NUM> is not higher than the lowest point of the cover body <NUM>. Considering that the phase will change in the process that the heat transfer fluid absorbs the cooling energy released by the evaporator <NUM>, that is, the heat transfer fluid will change from liquid to solid, leading the volume to expand, the initial liquid level of the heat transfer fluid is not higher than the lowest point of the cover body <NUM>, so that a gap will exist between the liquid level of the heat transfer fluid and the cover body <NUM>, which allows a space for volume expansion during the phase change process and avoids deformation of the box body <NUM> due to volume expansion.

As shown in <FIG> and <FIG>, the liquid storage box <NUM> is provided with an overflow port <NUM>, so that the box body <NUM> communicates with the outside atmosphere. Since the volume of the heat transfer fluid will change after the phase changes, when the volume reduces, the external air enters the box body <NUM> via the overflow port <NUM> to form a balance of internal and external air pressure. When the volume expands, its solid state expands to the surroundings, which will squeeze the box body <NUM>, and the excess air in the box body <NUM> will be discharged via the overflow port <NUM>, thus, a balance of internal and external air pressure will form to avoid deformation of the liquid storage box <NUM>. The overflow port <NUM> is higher than the lowest point of the cover body <NUM>, which also avoids excessive overflow of the heat transfer fluid and effects on the subsequent use.

Specifically, as shown in <FIG> and <FIG>, in the embodiment of the present application, the overflow port <NUM> is provided at the side wall of the box body <NUM>, so that when the heat transfer fluid stored in the box body <NUM> overflows, the heat transfer fluid can directly overflow to the outside of the heat pump dishwasher <NUM>, which is convenient for cleaning and avoids potential safety hazards.

As shown in <FIG> and <FIG>, the heat pump dishwasher <NUM> also includes a washing box body <NUM>, and at least part of the washing box body <NUM> is supported by an upper end surface of the cover body <NUM>. In this way, the washing box body <NUM> will press the cover body <NUM> and the box body <NUM> tightly, so that the weight carried by the cover body <NUM> is evenly distributed around the box body, and there is a uniform seal between the box body <NUM> and the cover body <NUM>. Thus, when the heat transfer fluid is stored in the box body <NUM>, leakage of the heat transfer fluid can be effectively prevented.

Further, to improve the sealing between the cover body <NUM> and the box body <NUM>, as shown in <FIG>, a sealing ring <NUM> is provided between the lower end surface of the cover body <NUM> and the box body <NUM>. Since the washing box body <NUM> is supported by the cover body <NUM>, the sealing ring <NUM> can better seal the gap between the lower end surface of the cover body <NUM> and the box body <NUM>, which can improve the sealing between the cover body <NUM> and the box body <NUM> and prevent the heat transfer fluid from overflowing, and the effect is good.

Specifically, as shown in <FIG> and <FIG>, the washing box body <NUM> is installed at the upper end surface of the cover body <NUM> through an installation structure, and the installation structure includes a supporting portion <NUM> extending upward from the cover body <NUM>. The upper end of the supporting portion <NUM> abuts against the washing box body <NUM> to allow an installation gap formed between the washing box body <NUM> and the cover body <NUM>, and the compressor <NUM> is located in the installation gap b, which can realize the installation of the compressor <NUM>, so that the heat pump dishwasher <NUM> has a compact structure.

It should be noted that there are many ways to install the washing box body <NUM> at the upper end surface of the cover body <NUM>. For example, an installation protrusion and an installation groove matched with the installation protrusion can be provided between the washing box body <NUM> and the cover body <NUM>. The installation protrusion extends along the periphery of the cover body <NUM>. In this way, the installation protrusion is matched with the installation groove, and the installation protrusion is locked and fixed in the installation groove through the threaded structure, so that an installation gap b is formed between the washing box body <NUM> and the cover body <NUM>. The compressor <NUM> is located in the installation gap b, which not only may realize the installation of the compressor <NUM>, but also may make the heat pump dishwasher <NUM> have a compact structure.

Further, as shown in <FIG> and <FIG>, the supporting portion <NUM> extends along the periphery of the cover body <NUM>, so that when the washing box body <NUM> is supported by the supporting portion <NUM>, the pressure on the cover body <NUM> from the washing box body <NUM> is evenly distributed on the periphery of the cover body <NUM> to improve the sealing effect.

To fix the washing box body <NUM> to the cover body <NUM>, as shown in <FIG> and <FIG>, the installation structure further includes a connection portion <NUM>, and the connection portion <NUM> extends vertically. One end of the connection portion <NUM> is connected to the side wall of the washing box body <NUM>, and the other end of the connection portion <NUM> is connected to the supporting portion <NUM>, so that the washing box body <NUM> is connected and fixed to the cover body <NUM>, and the structure is easy for installation.

To avoid misalignment when the washing box body <NUM> is installed at the cover body <NUM>, as shown in <FIG>, a guiding structure is provided between the washing box body <NUM> and the supporting portion <NUM>. The guiding structure includes a guiding portion <NUM> extending vertically and a matching portion <NUM> matched with the guiding portion <NUM>. One of the guiding portion <NUM> and the matching portion <NUM> is provided at the washing box body <NUM>, and the other one of the guiding portion <NUM> and the matching portion <NUM> is provided at the supporting portion <NUM>. The guiding portion <NUM> and the matching portion <NUM> are in a matching installation, to guide the installation of the washing box body <NUM>, so that the washing box body <NUM> can be accurately installed at the cover body <NUM>, which is easy to operate.

There are many types of guiding portion <NUM> and matching portion <NUM>. For example, the guiding portion <NUM> and the matching portion <NUM> can be set as a guiding groove and a guiding protrusion matched with the guiding groove. In an embodiment of the present application, the guiding portion <NUM> is a guiding column, and the matching portion <NUM> is a guiding hole matched with the guiding portion <NUM>. The guiding column and the guiding hole are in a matching installation, which can guide and support the washing box body <NUM>, to make the installation of the washing box body <NUM> stable.

Specifically, the bottom of the washing box body <NUM> is provided with a drainage groove <NUM>. As shown in <FIG>, the heat pump dishwasher <NUM> further includes a washing system, and the washing system includes a water inlet flow path provided in the installation gap b. A water inlet c1 of the water inlet flow path c communicates with the drainage groove <NUM>, and a water outlet c2 of the water inlet flow path c communicates with a spray arm <NUM> provided in the washing box body <NUM>. A circulation water pump <NUM> is provided at the water inlet flow path c. The heat pump system further includes a condenser <NUM> provided at the water inlet flow path c, and the condenser <NUM> includes a water inlet pipe. The water inlet pipe includes a condensate water inlet <NUM> and a condensate water outlet <NUM>, and the condensate water inlet <NUM> is lower than the condensation water outlet <NUM>. The condenser <NUM> is located between the drainage groove <NUM> and the circulation water pump <NUM>. In this way, when the spray arm <NUM> is required to spay water to the washing box body <NUM>, the washing water will first enter the washing box body <NUM>, and fills the drainage groove <NUM>. Then the water in the drainage groove <NUM> will flow along the water inlet flow path c and pass through the condenser <NUM> and the circulation water pump <NUM> in turn. After that, the washing water is heated by the condenser <NUM>, and then the washing water is pumped into the spray arm <NUM> by the circulation water pump <NUM> to wash the tableware in the washing box body <NUM>. Since the bottom of the drainage groove <NUM> is lower than the condensation water inlet <NUM> of the condenser <NUM> and the condensation water outlet <NUM> of the condenser <NUM> is lower than a circulation water inlet <NUM> of the circulation water pump <NUM> (as shown in <FIG>), the condenser <NUM> can be filled with water to avoid air in the condenser <NUM>. In addition, even if there is air in the condenser <NUM>, the air can be discharged through the circulation water pump <NUM> and the spray arm <NUM>, and the effect is good.

It should be noted that, in the above embodiments, the driving force is increased by the circulation water pump <NUM>, and the washing water after washing the tableware is re-transmitted to the water inlet flow path c, which not only can form a washing water circulation loop, but also can realize the cyclic utilization of the washing water and save water. The circulation water pump <NUM> is provided in the installation gap b, and the structural layout of the water inlet flow path c is compact, which can reduce the volume of the heat pump dishwasher <NUM> to a certain extent.

Further, after finishing the washing process, the washing water needs to be completely discharged. The washing system further includes a drainage flow path d provided in the installation gap b, and a drainage pump <NUM> is provided at the drainage flow path d. A drainage inlet d1 of the drainage flow path d communicates with the drainage groove <NUM>, so that the washing water can enter the drainage flow path d under the gravity, and the washing water in the drainage groove <NUM> after finishing the washing process can be completely discharged. The discharged washing water will flow into the drainage pump <NUM>, and the washing water will be quickly discharged by the drainage pump <NUM>. In addition, since the drainage inlet d1 of the drainage flow path d is lower than the condensation water inlet <NUM> of the condenser <NUM>, after finishing the washing process, the washing water in the condenser <NUM> can also flow back to the drainage groove <NUM>, and will be discharged through the drainage pipe communicating with the drain outlet d2 of the drainage flow path d, to completely discharge the washing water and prevent the washing water remained in the condenser <NUM> from affecting the next use.

Specifically, as shown in <FIG>, the evaporator <NUM> includes an evaporator core pipe <NUM>, and at least part of the evaporator core pipe <NUM> is submerged in the heat transfer fluid. The evaporator core pipe <NUM> is distributed in the box body <NUM>, which not only can increase the contact area between the evaporator core pipe <NUM> and the heat transfer fluid, but also can improve the efficiency of cooling transfer.

Further, the evaporator <NUM> includes two evaporator core pipes <NUM>, and the two evaporator core pipes <NUM> are bent back and forth. A first end of the evaporator core pipe <NUM> communicates with a first end of the other evaporator core pipe <NUM>, to form a refrigerant inlet 2111a. A second end of the evaporator core pipe <NUM> communicates with a second end of the other evaporator core pipe <NUM>, to form the refrigerant outlet 2111b. In this way, the time for the refrigerant contacting with the heat transfer fluid during the flowing process can be increased, and the transmitting efficiency of the cooling energy can be improved. The evaporator core pipe <NUM> is further provided with a heat transfer fins <NUM>, which increases the contact area between the heat transfer liquid and the evaporator <NUM>, and further improves the transmitting efficiency of the cooling energy. The heat pump system further includes a refrigerant circulation flow path <NUM>. Both the refrigerant outlet 2111b and the refrigerant inlet 2111a communicate with the refrigerant flow path, to realize the refrigerant circulation.

To reduce the volume of the heat pump dishwasher <NUM>, the evaporator <NUM> is shaped as a plate, so that most part of the evaporator <NUM> can be submerged in the heat transfer fluid, and the volume of the liquid storage box <NUM> and the amount of required heat transfer fluid can be reduced to a certain extent. In this way, not only the height of the dishwasher <NUM> can be reduced and the weight of the bottom of the dishwasher <NUM> can be increased, but also the center of gravity of the dishwasher <NUM> can be reduced and the structural stability of the dishwasher <NUM> can be increased, thereby saving the cost.

As shown in <FIG> and <FIG>, the heat pump system further includes a throttling device <NUM>. The throttling device <NUM> is located in the installation gap b, and the compressor <NUM>, the condenser <NUM>, the evaporator <NUM> and the throttling device <NUM> are provided at the refrigerant circulation flow path <NUM>. When the heat pump system operates, the compressor <NUM> is used as the driving device to promote the refrigerant circulation in the refrigerant circulation flow path <NUM>. The condenser <NUM> at the hot end of the compressor <NUM> heats the water at the water inlet flow path c, thereby increasing the decontamination ability of the washing water. The evaporator <NUM> will transmit the cold energy to the heat transfer fluid in the box body <NUM>, and provides a compact structure for the heat pump dishwasher <NUM> described above.

Considering that when the heat transfer fluid absorbs the cooling energy released by the evaporator <NUM>, a phase change of the heat transfer fluid will occur, and the heat transfer fluid will change from liquid to solid. When the heat transfer fluid around the evaporator <NUM> is solid, the efficiency of the heat transfer fluid absorbing the cooling energy of the evaporator <NUM> will greatly be reduced. To solve this problem, as shown in <FIG>, the heat pump dishwasher <NUM> further includes a heating assembly <NUM>, and the heating assembly <NUM> is provided at a position corresponding to the box body <NUM>. The heating assembly <NUM> is used to heat the box body <NUM>, so that the heat transfer liquid in the solid state after absorbing the cold energy can absorb heat and restore to the liquid state, which is convenient for the heat pump dishwasher <NUM> to operate and absorb the cold energy of the evaporator <NUM>.

Claim 1:
A heat pump dishwasher (<NUM>) comprising:
a chassis (<NUM>), and
a heat pump system comprising an evaporator (<NUM>) and a compressor (<NUM>), wherein both the evaporator (<NUM>) and the compressor (<NUM>) are installed at the chassis (<NUM>), and
characterised in that a liquid collecting groove (a) is provided at an upper side of the chassis (<NUM>), the compressor (<NUM>) is installed at the liquid collecting groove (a), and the chassis (<NUM>) comprises a liquid storage box (<NUM>), the liquid storage box (<NUM>) comprises a box body (<NUM>) with an opening facing upward and a cover body (<NUM>) for covering the opening, the cover body (<NUM>) is partially concave to form the liquid collecting groove (a), the evaporator (<NUM>) is installed inside the box body (<NUM>), the compressor (<NUM>) is located outside the box body (<NUM>), and heat transfer fluid is stored in the box body (<NUM>).